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1. An Esterase with Increased Acetone Tolerance from Bacillus subtilis E9 over Expressed in E. coli BL21 Using pTac Bs-est Vector

Author:
P. Soumya; Jayachandran Kochupurackal
Source:
Molecular biotechnology 2022 v.64 no.7 pp. 814-824
ISSN:
1073-6085
Subject:
Bacillus subtilis; DNA assembly; Escherichia coli; acetates; acetone; amino acids; ampicillin; biotechnology; computer simulation; esterases; genes; ligands; peptides; plasmids; recombinant proteins; replication origin; solvents
Abstract:
... Bacillus subtilis E9 was identified as a potential strain producing esterase. The gene coding esterase from B. subtilis E9 was amplified using esterase-specific primers and the sequence was translated in silico. The presence of conserved catalytic triad amino acid residues (His-Ser-Asp/Glu) confirmed the functional nature of the esterase enzyme. Docking studies conducted with modeled protein and t ...
DOI:
10.1007/s12033-022-00458-4

2. Biodegradation of diisopropyl ether, ethyl tert-butyl ether, and other fuel oxygenates by Mycolicibacterium sp. strain CH28

Author:
Ingrid Zsilinszky; Balázs Fehér; István Kiss; Attila Komóczi; Péter Gyula; Zsolt Szabó
Source:
Bioremediation journal 2022 v.26 no.2 pp. 138-149
ISSN:
1547-6529
Subject:
Hydrogenophaga; acetates; acetone; alkanes; biodegradation; bioremediation; gasoline; groundwater; isopropyl alcohol; methyl ethers; mineralization; pH
Abstract:
... Growing use of recalcitrant fuel oxygenates like methyl tert-butyl ether (MTBE), ethyl tert-butyl ether (ETBE), tert-amyl methyl ether (TAME), and diisopropyl ether (DIPE) poses serious threat to aquatic environments and drinking water sources. Mycolicibacterium sp. strain CH28 was isolated earlier as a potential degrader of DIPE. Optimal culture conditions for strain CH28 were determined to be 32 ...
DOI:
10.1080/10889868.2021.1911924

3. Earth-friendly-assessed chromatographic platforms for rapid analysis of sulfacetamide sodium and prednisolone acetate in presence of sulfanilamide impurity: Application on ophthalmic formulation and aqueous humor

Author:
Rania A. Sayed; Ahmed R. Mohamed; Wafaa S. Hassan; Manal S. Elmasry
Source:
Sustainable chemistry and pharmacy 2022 v.27 pp. 100694
ISSN:
2352-5541
Subject:
acetates; acetone; ammonia; antibiotics; bioavailability; chemical species; chloroform; densitometry; green chemistry; methanol; pH; phosphoric acid; prednisolone; rabbits; rapid methods; silica gel; sodium; sulfacetamide; sulfanilamide
Abstract:
... Sulfacetamide sodium as an antibacterial agent is co-formulated with prednisolone acetate in Phenamide-P® ophthalmic suspension to cure the ophthalmic infections correlated with inflammatory disorders. For the first time, two innovative, sensitive, specific, and robust chromatographic platforms were developed and their conditions were optimized for rapid analysis of the aforementioned drugs either ...
DOI:
10.1016/j.scp.2022.100694

4. Gas chromatographic-mass spectrometric analysis, antioxidant, antiproliferative and antibacterial activities of the essential oil of Prangospabularia

Author:
Javid A. Banday; Zubaid-ul-khazir Rather; Gulam N. Yatoo; Mohammad Asif Hajam; Sajad A. Bhat; Vichangal Pridiuldi Santhanakrishnan; Alia Farozi; Manzoor A. Rather; Shahid Rasool
Source:
Microbial pathogenesis 2022 v.166 pp. 105540
ISSN:
0882-4010
Subject:
Escherichia coli; Micrococcus; Prangos pabularia; acetates; acetone; adenocarcinoma; agar; aldehydes; antibacterial properties; antineoplastic activity; breasts; cell lines; cytotoxicity; epithelium; essential oils; free radicals; humans; lungs; oils; pathogenesis; streptomycin; sulfates; toxicity testing; uterine cervical neoplasms; India
Abstract:
... The essential oil composition of the shoot parts of Prangos pabularia, growing in Drass area of Ladakh, India, along with its antioxidant, antibacterial and anticancer activity, is reported for the first time. Gas chromatography coupled with mass spectrometry (GC-MS) revealed the presence of 31 constituents, representing 97.342% of the total essential oil. The major constituents of essential oil w ...
DOI:
10.1016/j.micpath.2022.105540

5. Revealing the mechanism of high water resistant and excellent active of CuMn oxide catalyst derived from Bimetal-Organic framework for acetone catalytic oxidation

Author:
Lei Wang; Yonggang Sun; Yinbo Zhu; Juan Zhang; Jie Ding; Jingdan Gao; Wenxin Ji; YuanYuan Li; Liqiong Wang; Yulong Ma
Source:
Journal of colloid and interface science 2022 v.622 pp. 577-590
ISSN:
0021-9797
Subject:
Fourier transform infrared spectroscopy; acetaldehyde; acetates; acetone; active oxygen species; carbon dioxide; catalysts; catalytic activity; dissociation; formates; humidity; oxidation; water vapor
Abstract:
... Environmental H₂O is an influential factor in the low-temperature catalytic oxidation of volatile organic compounds (VOCs), and it significantly impacts the reaction process and mechanism. Here, a series of rod-like Cu-Mn oxides were synthesised by pyrolysing Cu/Mn-BTC for acetone oxidation. The results confirm that the formation of multiphase interfaces have more excellent catalytic performance c ...
DOI:
10.1016/j.jcis.2022.04.155

6. Study on the inhibition kinetics parameters of esterases enzymes from the red palm Weevil Larvae

Author:
Takwa E. Ellakwa; Tarek R. Amin
Source:
Ecological Genetics and Genomics 2022 v.22 pp. 100113
ISSN:
2405-9854
Subject:
Rhynchophorus ferrugineus; acetates; acetone; activation energy; catalytic activity; centrifugation; cytosol; dissociation; ecological genetics; esterases; hydrolysis; insecticides; instars; pest control
Abstract:
... Aromatic esterases from the red palm weevil; Rynchophorus ferrugineus 5th instar larvae were partially fractionated using differential centrifugation technique to study some enzyme properties and possible use of some inorganic salts as enzyme inhibitors hoping for future use in the field of pest control. Cytosol soluble fraction contained most of esterases activity. Esterases catalysis was activat ...
DOI:
10.1016/j.egg.2022.100113

7. Terpene volatiles mediates the chemical basis of blueberry aroma and consumer acceptability

Author:
Luís Felipe V. Ferrão; Haley Sater; Paul Lyrene; Rodrigo R. Amadeu; Charles A. Sims; Denise M. Tieman; Patricio R. Munoz
Source:
Food research international 2022 v.158 pp. 111468
ISSN:
0963-9969
Subject:
acetates; acetone; blueberries; consumer acceptance; flavor; food research; fruits; humans; limonene; linalool; metabolomics; odors; p-cymene; pedigree; sensory evaluation; smell; taste; tongue; vegetables; volatile organic compounds
Abstract:
... Flavor is among the most important traits valued by consumers of fresh fruits. Human perception of flavor occurs primarily through two main sensory inputs, taste and aroma. Through retronasal olfaction, volatile organic compounds (VOCs) emitted by the fruit are able to produce the sensation of aroma which when combined with gustatory inputs from the tongue together underly our perception of the th ...
DOI:
10.1016/j.foodres.2022.111468

8. Anthelmintic, antimycobacterial, antifungal, larvicidal and cytotoxic activities of acetone leaf extracts, fractions and isolated compounds from Ptaeroxylon obliquum (Rutaceae)

Author:
Thanyani Emelton Ramadwa; Lyndy Joy McGaw; Mathew Adamu; Balungile Madikizela; Jacobus Nicolaas Eloff
Source:
Journal of ethnopharmacology 2021 v.280 pp. 114365
ISSN:
0378-8741
Subject:
Aedes aegypti; Aspergillus fumigatus; Candida albicans; Cercopithecus aethiops; Cryptococcus neoformans; Haemonchus contortus; Mycobacterium bovis; Mycobacterium tuberculosis; Rutaceae; acetates; acetone; anthelmintics; antibacterial properties; antifungal properties; cytotoxicity; eggs; fungi; humans; kidneys; larval development; larvicides; leaf extracts; leaves; liver; lupeol; medicinal plants; minimum inhibitory concentration; tetrazolium; traditional medicine; tuberculosis; South Africa
Abstract:
... Ptaeroxylon obliquum (Thunb.) Radlk, sneezewood, is a commonly used medicinal plant in South Africa for the treatment of parasitic infections in animals, tuberculosis (TB) and related symptoms, and other microbial infections.In this study anthelmintic, antifungal, antimycobacterial, larvicidal and cytotoxic activities of the acetone leaf extract of P. obliquum, solvent-solvent derived fractions of ...
DOI:
10.1016/j.jep.2021.114365

9. Chemical Composition, Allelopathic, Antioxidant, and Anti-Inflammatory Activities of Sesquiterpenes Rich Essential Oil of Cleome amblyocarpa Barratte & Murb.

Author:
Ahmed M. Abd-ElGawad; Abdelbaset M. Elgamal; Yasser A. EI-Amier; Tarik A. Mohamed; Abd El-Nasser G. El Gendy; Abdelsamed I. Elshamy
Source:
Plants 2021 v.10 no.7 pp. -
ISSN:
2223-7747
Subject:
Cleome; Dactyloctenium aegyptium; acetates; acetone; allelochemicals; allelopathy; antioxidants; ascorbic acid; chemical composition; chemometrics; essential oils; gas chromatography-mass spectrometry; germination; hydrodistillation; lipoxygenases; medicinal plants; oils; prostaglandin synthase; seedlings; sesquiterpenoids; weeds; Egypt
Abstract:
... The integration of green natural chemical resources in agricultural, industrial, and pharmaceutical applications allures researchers and scientistic worldwide. Cleome amblyocarpa has been reported as an important medicinal plant. However, its essential oil (EO) has not been well studied; therefore, the present study aimed to characterize the chemical composition of the C. amblyocarpa, collected fr ...
DOI:
10.3390/plants10071294

10. Determination of certain VOCs in paints and architectural coatings by dynamic headspace gas chromatography-mass spectrometry

Author:
Nicholas P. Alderman; Matthew Courville; Ryszard Tokarczyk
Source:
Analytical methods 2021 v.13 no.35 pp. 3894-3899
ISSN:
1759-9679
Subject:
acetates; acetone; activated carbon; carbonates; climate change; environmental protection; gas chromatography-mass spectrometry; headspace analysis; methylene chloride; propylene; quantitative analysis; Canada
Abstract:
... A quantitative method for the determination of the following VOCs: acetone, dichloromethane, dimethyl carbonate, methyl acetate, tertiary butyl acetate, chlorobenzotrifluoride (4-CBTF) and propylene carbonate in paints was developed in support of Environment and Climate Change Canada's Automotive Refinishing Product and Architectural Coatings VOC Concentration Limits regulations. These compounds a ...
DOI:
10.1039/d1ay00273b

11. Direct conversion of dimethyl ether and CO to acetone via coupling carbonylation and ketonization

Author:
Ziqiao Zhou; Hongchao Liu; Youming Ni; Fuli Wen; Zhiyang Chen; Wenliang Zhu; Zhongmin Liu
Source:
Journal of catalysis 2021 v.396 pp. 360-373
ISSN:
0021-9517
Subject:
acetates; acetone; benzene; carbon dioxide; catalytic activity; isotopes; moieties; propylene; pyrones
Abstract:
... Acetone is currently produced by large amount of propylene and benzene, and its synthesis from a cheap and non-petroleum material has not yet been reported. Here, we present a new method for acetone production, which involves the carbonylation of dimethyl ether (DME) to methyl acetate and its subsequent ketonization to acetone over pyridine-modified H-mordenite. This convenient approach offers an ...
DOI:
10.1016/j.jcat.2021.03.006

12. Enhanced Stabilities and Production Yields of MAPbBr₃ Quantum Dots and Their Applications as Stretchable and Self-Healable Color Filters

Author:
Han Sol Yang; Sung Hoon Noh; Eui Hyun Suh; Jaemin Jung; Jong Gyu Oh; Kyeong Ho Lee; Jaeyoung Jang
Source:
ACS applied materials & interfaces 2021 v.13 no.3 pp. 4374-4384
ISSN:
1944-8252
Subject:
acetates; acetone; centrifugation; color; cost effectiveness; hydrolysis; ligands; light emitting diodes; methanol; nanocrystals; photoluminescence; thermoplastics
Abstract:
... Organic–inorganic hybrid CH₃NH₃PbBr₃ (MAPbBr₃) perovskite quantum dots (PQDs) are considered as promising and cost-effective building blocks for various optoelectronic devices. However, during centrifugation for the purification of these PQDs, commonly used polar protic and aprotic non-solvents (e.g., methanol and acetone) can destroy the nanocrystal structure of MAPbBr₃ perovskites, which will si ...
DOI:
10.1021/acsami.0c19287

13. Free Volatile Compounds of Veronica austriaca ssp. jacquinii (Baumg.) Eb. Fisch. and Their Biological Activity

Author:
Marija Nazlić; Željana Fredotović; Elma Vuko; Nenad Vuletić; Ivica Ljubenkov; Dario Kremer; Renata Jurišić Grubešić; Edith Stabentheiner; Marko Randić; Valerija Dunkić
Source:
Plants 2021 v.10 no.11 pp. -
ISSN:
2223-7747
Subject:
2,2-diphenyl-1-picrylhydrazyl; Veronica; acetates; acetone; flavonoids; gas chromatography; hydrosols; mass spectrometry; methyl eugenol; oxygen radical absorbance capacity; palmitic acid; polyphenols; thymol; toxicity; trichomes
Abstract:
... The composition of free volatile compounds of essential oils (EO) and hydrosols (Hy) from four different localities of the species Veronica austriaca ssp. jacquinii (Baumg.) Eb. Fisch. were analyzed by gas chromatography coupled with mass spectrometry. In the EOs, the most abundant compounds identified were hexahydrofarnesyl acetone (23.34–52.56%), hexadecanoic acid (palmitic acid, 26.71–58.91%) a ...
DOI:
10.3390/plants10112529

14. In vitro acaricidal activity of essential oil and crude extracts of Laurus nobilis, (Lauraceae) grown in Tunisia, against arthropod ectoparasites of livestock and poultry: Hyalomma scupense and Dermanyssus gallinae

Author:
Dhouha Alimi; Azhar Hajri; Selim Jallouli; Hichem Sebai
Source:
Veterinary parasitology 2021 v.298 pp. 109507
ISSN:
0304-4017
Subject:
Dermanyssus gallinae; Hyalomma; Laurus nobilis; acaricidal properties; acetates; acetone; adults; cyclohexanes; drugs; essential oils; ethanol; females; gallic acid; larvae; linalool; livestock; mites; mortality; oils; quercetin; sabinene; ticks; toxicity; veterinary parasitology; Tunisia
Abstract:
... The current study assayed the toxicity of Laurus nobilis essential oil and crude extracts obtained using solvents of increasing polarity (cyclohexane, acetone and ethanol), on two ectoparasites of veterinary importance, i.e., Hyalomma scupense and Dermanyssus gallinae.The major components detected in bay laurel essential oil were dominated by 1.8-cineole (46.56 %), α-terpinenyl acetate (13.99 %), ...
DOI:
10.1016/j.vetpar.2021.109507

15. La‐ H‐zeolites: efficient catalysts for acetic acid ketonic decarboxylation and esterification

Author:
Gheorghiţa Mitran; Shaojiang Chen; Wenyu Huang; Dong‐Kyun Seo
Source:
Journal of chemical technology and biotechnology 2021 v.96 no.7 pp. 2022-2032
ISSN:
0268-2575
Subject:
Fourier transform infrared spectroscopy; Lewis acids; acetates; acetic acid; acetone; acidity; adsorption; ammonium; biotechnology; decarboxylation; drugs; esterification; ion exchange; land evaluation; lanthanum; pyridines; zeolites
Abstract:
... BACKGROUND: Cyclohexyl acetate and acetone are used as environmentally friendly solvents, while isobutene acts as an intermediate in the production of methacrolein, ethers, plastics and pharmaceuticals. Two La‐zeolite catalysts have been studied for converting acetic acid to cyclohexyl acetate, acetone and isobutene. RESULTS: La‐based zeolites were synthesized from Na‐nFAU zeolites by ammonium ion ...
DOI:
10.1002/jctb.6732

16. Purification of high molecular weight thermotolerant esterase from Serratia sp. and its characterization

Author:
Kamal Kumar Bhardwaj; Shweta Kishen; Akshita Mehta; Abhishek Sharma; Reena Gupta
Source:
3 Biotech 2021 v.11 no.6 pp. 308
ISSN:
2190-572X
Subject:
EDTA (chelating agent); Serratia marcescens; acetates; acetone; acetonitrile; acyl carrier protein; ammonium sulfate; cellulose; chromatography; dimethyl sulfoxide; esterases; ethanol; glycerol; half life; heat tolerance; hydrolysis; isopropyl alcohol; matrix-assisted laser desorption-ionization mass spectrometry; methanol; molecular weight; octoxynol; pH; polyacrylamide gel electrophoresis; polysorbates; sodium dodecyl sulfate; solvents
Abstract:
... In the present study, an extracellular esterase from Serratia sp. was purified 24.46 fold using an initial ammonium sulphate precipitation step (optimized concentration of 30–40%), followed by Diethylaminoethyl cellulose (DEAE-cellulose) chromatography and size exclusion Sephadex G-200 column chromatography steps. The molecular weight of the esterase using native polyacrylamide gel electrophoresis ...
DOI:
10.1007/s13205-021-02852-2

17. Species-Specific Induction of Plant Volatiles by Two Aphid Species in Apple: Real Time Measurement of Plant Emission and Attraction of Lacewings in the Wind Tunnel

Author:
Zaid Badra; Sebastian Larsson Herrera; Luca Cappellin; Franco Biasioli; Teun Dekker; Sergio Angeli; Marco Tasin
Source:
Journal of chemical ecology 2021 v.47 no.7 pp. 653-663
ISSN:
0098-0331
Subject:
Aphis pomi; Chrysoperla carnea; Dysaphis plantaginea; acetates; acetic acid; acetone; apples; benzaldehyde; butyrates; chemical ecology; linalool; methyl salicylate; odors; pests; phenylethyl alcohol; volatile compounds; wind tunnels
Abstract:
... Upon damage by herbivores, plants release herbivory-induced plant volatiles (HIPVs). To find their prey, the pest’s natural enemies need to be fine-tuned to the composition of these volatiles. Whereas standard methods can be used in the identification and quantitation of HIPVs, more recently introduced techniques such as PTR-ToF–MS provide temporal patterns of the volatile release and detect addit ...
DOI:
10.1007/s10886-021-01288-5

18. Surface modification of TiO2 with Pd nanoparticles for enhanced photocatalytic oxidation of benzene micropollutants

Author:
Dmitry Selishchev; Dmitry Svintsitskiy; Larisa Kovtunova; Evgeny Gerasimov; Alexey Gladky; Denis Kozlov
Source:
Colloids and surfaces 2021 v.612 pp. 125959
ISSN:
0927-7757
Subject:
acetates; acetone; air; benzene; byproducts; fabrics; ligands; nanocatalysts; oxidation; palladium; photocatalysis; photocatalysts; photolysis; pollutants; temperature; thermal degradation; titanium dioxide; ultraviolet radiation; vapors
Abstract:
... This paper describes a simple method for the modification of TiO₂ surface with palladium to prepare a highly active photocatalyst for oxidation of benzene micropollutants in air. The method consists of the impregnation of anatase TiO₂ with a solution of palladium (II) acetate (Pd(OAc)₂) in acetone followed by photodecomposition of Pd(OAc)₂ under UV irradiation. No additional electron donor is requ ...
DOI:
10.1016/j.colsurfa.2020.125959

19. The impact of chloride and chlorine radical on nitrite formation during vacuum UV photolysis of water

Author:
Mengqi Han; Morteza Jafarikojour; Madjid Mohseni
Source:
Science of the total environment 2021 v.760 pp. 143325
ISSN:
0048-9697
Subject:
absorption; acetates; acetone; chlorides; chlorine; environment; hydroxyl radicals; nitrates; nitrites; oxidation; photolysis
Abstract:
... The impact of chloride ion and chlorine radical on the formation of nitrite was investigated under Vacuum-UV (VUV) photolysis of nitrate contaminating water. An increase in chloride concentration reduced nitrite formation in part due to the relatively high VUV absorption of chloride. The use of various radical scavengers, such as acetate and acetone, helped delineate the specific roles of hydroxyl ...
DOI:
10.1016/j.scitotenv.2020.143325

20. Toxicity and Sublethal Effect of Farnesyl Acetate on Diamondback Moth, Plutella xylostella (L.) (Lepidoptera: Plutellidae)

Author:
Norazila Yusoff; Idris Abd Ghani; Nurul Wahida Othman; Wan Mohd Aizat; Maizom Hassan
Source:
Insects 2021 v.12 no.2 pp. -
ISSN:
2075-4450
Subject:
Brassicaceae; Plutella xylostella; acetates; acetone; chlorides; eggs; fecundity; females; oviposition; pests; pupae; pupation; sublethal effects
Abstract:
... The diamondback moth, Plutella xylostella (L.) (Lepidoptera: Plutellidae), is the most important pest of cruciferous vegetables worldwide. In this study, we evaluated the properties of selected farnesyl derivative compounds against P. xylostella. The toxicity and sublethal concentration (LC₅₀) of farnesyl acetate, farnesyl acetone, farnesyl bromide, farnesyl chloride, and hexahydrofarnesyl acetone ...
DOI:
10.3390/insects12020109

21. Volatile compounds, bacteria compositions and physicochemical properties of 10 fresh fermented rice noodles from southern China

Author:
Ai-Xia Wang; Cuiping Yi; Tianzhen Xiao; Wanyu Qin; Zhiying Chen; Yue He; Lili Wang; Liya Liu; Fengzhong Wang; Li-Tao Tong
Source:
Food research international 2021 v.150 pp. 110787
ISSN:
0963-9969
Subject:
Lactococcus; Leuconostoc; acetates; acetone; chromatography; ethanol; fermentation; flavor; food research; furans; noodles; proximate composition; rice; spectroscopy; texture; China
Abstract:
... To clarify the discrepancy in characteristic flavor and bacteria composition of 10 fresh fermented rice noodles from southern China, the volatile and bacteria composition were determined by headspace-gas chromatography ion mobility spectrometry and 16SrRNA sequencing methods. The potential relationship between volatile compounds and bacterial composition has also been further revealed using spearm ...
DOI:
10.1016/j.foodres.2021.110787

22. Volatile fatty acid production from Kraft mill foul condensate in upflow anaerobic sludge blanket reactors

Author:
Tejaswini Eregowda; Marika E. Kokko; Eldon R. Rene; Jukka Rintala; Piet N. L. Lens
Source:
Environmental technology 2021 v.42 no.16 pp. 2447-2460
ISSN:
1479-487X
Subject:
acetates; acetogens; acetone; biomass; butyrates; condensates; environmental technology; ethanol; kraft pulp; methane production; methanol; organic carbon; propionic acid; upflow anaerobic sludge blanket reactor; volatile fatty acids; wastewater
Abstract:
... The utilization of foul condensate (FC) collected from a Kraft pulp mill for the anaerobic production of volatile fatty acids (VFA) was tested in upflow anaerobic sludge blanket (UASB) reactors operated at 22, 37 and 55°C at a hydraulic retention time (HRT) of ∼75 h. The FC consisted mainly of 11370, 500 and 592 mg/L methanol, ethanol and acetone, respectively. 42–46% of the organic carbon (methan ...
DOI:
10.1080/09593330.2019.1703823

23. Carbon‑nitrogen compounds, alcohols, mercaptans, monoterpenes, acetates, aldehydes, ketones, SF6, PH3, and other fire gases in coal-mining waste heaps of Upper Silesian Coal Basin (Poland) – a re-investigation by means of in situ FTIR external database approach

Author:
Łukasz Kruszewski; Monika J. Fabiańska; Tomasz Segit; Danuta Kusy; Rafał Motyliński; Justyna Ciesielczuk; Ewa Deput
Source:
Science of the total environment 2020 v.698 pp. 134274
ISSN:
0048-9697
Subject:
Fourier transform infrared spectroscopy; United Nations Framework Convention on Climate Change; acetaldehyde; acetates; acetone; acetylene; acrolein; alcohols; aromatic hydrocarbons; basins; coal; databases; ethers; formic acid; gases; greenhouse gases; hydrogen cyanide; methane; mineralization; monoterpenoids; nitriles; probability; quantitative analysis; sulfur; sulfur hexafluoride; tetrachloroethylene; thiols; triethylamine; wastes; Poland
Abstract:
... Coal-fire gas jets emanating from waste heaps are chemically very complex and variable mixtures, as proved by our former studies. The current paper is a result of further exploration of the GASMET FTIR system via an iterative external databases search. This allowed to pinpoint a number of subsequent chemicals, both in terms of (semi)quantitative analysis and occurrence probability (fit). Some comp ...
DOI:
10.1016/j.scitotenv.2019.134274

24. Efficient isopropanol biosynthesis by engineered Escherichia coli using biologically produced acetate from syngas fermentation

Author:
Hao Yang; Can Zhang; Ningyu Lai; Bing Huang; Peng Fei; Dawei Ding; Peng Hu; Yang Gu; Hui Wu
Source:
Bioresource technology 2020 v.296 pp. 122337
ISSN:
0960-8524
Subject:
Clostridium acetobutylicum; Clostridium beijerinckii; Escherichia coli; acetates; acetone; biosynthesis; cost effectiveness; feedstocks; fermentation; isopropyl alcohol; synthesis gas
Abstract:
... The shortage of food based feedstocks is a challenge in industrial biomanufacturing. In this study, genetically modified Escherichia coli strains were used to produce isopropanol as the mainly product from acetate, a cost-effective nonfood-based substrate. The isopropanol biosynthesis pathway was constructed by combining genes from Clostridium acetobutylicum (thlA, adc), E. coli (atoDA) and Clostr ...
DOI:
10.1016/j.biortech.2019.122337

25. Enhancement of acetyl-CoA flux for photosynthetic chemical production by pyruvate dehydrogenase complex overexpression in Synechococcus elongatus PCC 7942

Author:
Yasutaka Hirokawa; Takeshi Kubo; Yuki Soma; Fumiko Saruta; Taizo Hanai
Source:
Metabolic engineering 2020 v.57 pp. 23-30
ISSN:
1096-7176
Subject:
NAD (coenzyme); Synechococcus sp. PCC 7942; acetates; acetone; acetyl coenzyme A; biochemical pathways; carbon dioxide; catalytic activity; decarboxylation; enzyme activity; fatty acids; gene overexpression; genes; genetic engineering; isoprene; isopropyl alcohol; malonyl coenzyme A; metabolites; models; photosynthesis; pyruvate dehydrogenase (lipoamide); pyruvic acid
Abstract:
... Genetic manipulation in cyanobacteria enables the direct production of valuable chemicals from carbon dioxide. However, there are still very few reports of the production of highly effective photosynthetic chemicals. Several synthetic metabolic pathways (e.g., isopropanol, acetone, isoprene, and fatty acids) have been constructed by branching from acetyl-CoA and malonyl-CoA, which are key intermed ...
DOI:
10.1016/j.ymben.2019.07.012

26. Extrusion process to enhance the pretreatment effect of ionic liquid for improving enzymatic hydrolysis of lignocellulosic biomass

Author:
Song-Yi Han; Chan-Woo Park; Takashi Endo; Fauzi Febrianto; Nam-Hun Kim; Seung-Hwan Lee
Source:
Wood science and technology 2020 v.54 no.3 pp. 599-613
ISSN:
0043-7719
Subject:
Salix gracilistyla; acetates; acetone; alcohols; biomass; cell walls; cellulose; crystal structure; dimethyl sulfoxide; enzymatic hydrolysis; extrusion; glucose; ionic liquids; lignocellulose; saccharification; temperature; water solubility; wood; xylose
Abstract:
... Extrusion process using 1-ethyl-3-methylimidazolium acetate ([EMIM]Ac) in co-solvent, dimethyl sulfoxide (DMSO), was conducted to improve the pretreatment effect on the enzymatic saccharification of pussy willow (Salix gracilistyla Miq.). The use of a twin screw extruder capable of continuous processing increased the solid loading to 50% in [EMIM]Ac and its co-solvent DMSO. The water-soluble fract ...
DOI:
10.1007/s00226-020-01170-9

27. Investigation of Atmospheric Pressure Photochemical Ionization Mass Spectra of Binary Organic Solutions without Their Separation in Dependence on the Concentration of Solutions and Analyte Vapors in Nitrogen Using the Exponential Dilution Method and a Time-of-Flight Mass Spectrometer with an Atmospheric Pressure Photochemical Ionization Ion Source

Author:
I. A. Revelsky; A. A. Sysoev; A. I. Revelsky; A. G. Adamov; S. S. Poteshin; A. S. Samokhin; M. E. Chivarzin; D. A. Chepelyansky; Yu. S. Yashin
Source:
Journal of analytical chemistry 2020 v.75 no.14 pp. 1743-1748
ISSN:
1061-9348
Subject:
acetates; acetone; analytical chemistry; atmospheric pressure; chemical species; glass; ionization; magnetism; nitrogen; photochemistry; solvents; spectrometers; temperature; vapors
Abstract:
... The study is devoted to the investigation of atmospheric pressure photochemical ionization mass spectra of binary organic solutions of a small set of the analytes (dibutyl ether, propyl acetate, amyl acetate) in the same solvent (acetone) in the vapor phase and in a nitrogen flow without their separation in dependence on the analyte concentration in the solution and in nitrogen. The study was carr ...
DOI:
10.1134/S1061934820140117

28. Metabolic rewiring of synthetic pyruvate dehydrogenase bypasses for acetone production in cyanobacteria

Author:
Hyun Jeong Lee; Jigyeong Son; Sang Jun Sim; Han Min Woo
Source:
Plant biotechnology journal 2020 v.18 no.9 pp. 1860-1868
ISSN:
1467-7644
Subject:
Synechococcus sp. PCC 7942; acetates; acetone; acetyl coenzyme A; biotechnology; carbon; carbon dioxide; enzyme activity; malonyl coenzyme A; photosynthesis; pyruvate dehydrogenase (lipoamide)
Abstract:
... Designing synthetic pathways for efficient CO₂ fixation and conversion is essential for sustainable chemical production. Here we have designed a synthetic acetate‐acetyl‐CoA/malonyl‐CoA (AAM) bypass to overcome an enzymatic activity of pyruvate dehydrogenase complex. This synthetic pathway utilizes acetate assimilation and carbon rearrangements using a methyl malonyl‐CoA carboxyltransferase. We de ...
DOI:
10.1111/pbi.13342

29. On the reversible deactivation of cobalt ferrite spinel nanoparticles applied in selective 2-propanol oxidation

Author:
Sven Anke; Tobias Falk; Georg Bendt; Ilya Sinev; Michael Hävecker; Hendrik Antoni; Ioannis Zegkinoglou; Hyosang Jeon; Axel Knop-Gericke; Robert Schlögl; Beatriz Roldan Cuenya; Stephan Schulz; Martin Muhler
Source:
Journal of catalysis 2020 v.382 pp. 57-68
ISSN:
0021-9517
Subject:
X-ray absorption spectroscopy; X-ray diffraction; X-ray photoelectron spectroscopy; acetates; acetone; carbon; carbon dioxide; carbonates; cobalt; desorption; ferrimagnetic materials; infrared spectroscopy; isopropyl alcohol; nanoparticles; nitrous oxide; oxidation; oxygen; particle size; propylene; synthesis; temperature; transmission electron microscopy
Abstract:
... CoFe₂O₄ nanoparticles (NPs) were synthesized by using a colloidal one-pot synthesis method based on the decomposition of metal acetylacetonates in the presence of oleyl amine. The characterization by X-ray diffraction, transmission electron microscopy and N₂physisorption revealed non-porous spinel phase CoFe₂O₄ NPs with an average particle size of 4 nm. The unsupported metal oxide NPs were applied ...
DOI:
10.1016/j.jcat.2019.12.007

30. Preparation of Cellulose Particles with a Hollow Structure

Author:
Taro Omura; Toyoko Suzuki; Hideto Minami
Source:
Langmuir 2020 v.36 no.46 pp. 14076-14082
ISSN:
1520-5827
Subject:
acetates; acetone; cellulose; ethanol; hexane; ionic liquids; separation; stabilizers; thermodynamics
Abstract:
... In this study, we report the preparation of hollow cellulose particles via a solvent-releasing method with the ionic liquid 1-ethyl-3-methylimidazolium acetate ([Emim]Ac). A dispersion comprising [Emim]Ac droplets with dissolved cellulose and a hexane medium containing a stabilizer was poured into a large amount of acetone (precipitant), resulting in the precipitation of cellulose and the formatio ...
DOI:
10.1021/acs.langmuir.0c02646

31. Recent advances in n-butanol and butyrate production using engineered Clostridium tyrobutyricum

Author:
Teng Bao; Jun Feng; Wenyan Jiang; Hongxin Fu; Jufang Wang; Shang-Tian Yang
Source:
World journal of microbiology & biotechnology 2020 v.36 no.9 pp. 138
ISSN:
0959-3993
Subject:
Clostridium acetobutylicum; Clostridium tyrobutyricum; Escherichia coli; acetates; acetone; aldehyde dehydrogenase; bacteria; biosynthesis; biotechnology; butanol; ethanol; fermentation; fermented foods; galactose; glucose; sucrose; xylose
Abstract:
... Acidogenic clostridia naturally producing acetic and butyric acids has attracted high interest as a novel host for butyrate and n-butanol production. Among them, Clostridium tyrobutyricum is a hyper butyrate-producing bacterium, which re-assimilates acetate for butyrate biosynthesis by butyryl-CoA/acetate CoA transferase (CoAT), rather than the phosphotransbutyrylase-butyrate kinase (PTB-BK) pathw ...
DOI:
10.1007/s11274-020-02914-2

32. Table olive polyphenols: A simultaneous determination by liquid chromatography–mass spectrometry

Author:
Rocío Moreno-González; M. Emília Juan; Joana M. Planas
Source:
Journal of chromatography 2020 v.1609 pp. 460434
ISSN:
0021-9673
Subject:
European Union; acetates; acetic acid; acetone; acetonitrile; apigenin; bioactive compounds; caffeic acid; catechol; chronic diseases; electrospray ionization mass spectrometry; functional foods; health claims; liquid chromatography; luteolin; oleuropein; olive oil; olives; p-coumaric acid; polyphenols; protective effect; quercetin; rutin; vanillic acid; verbascoside
Abstract:
... Table olives contain a wide range of polyphenols responsible for protective effects on health that have been associated with a lower prevalence of chronic diseases. A new method to identify and quantify these compounds in table olives, by means of methanol:ethanol (1:1; v/v) extraction followed by LC-ESI-MS/MS, has been developed and validated. The chromatographic column Eclipse-XDB-C18, never use ...
DOI:
10.1016/j.chroma.2019.460434

33. A Mechanistic Study of Dehydrogenation of Propane over Vanadia–Titania Catalysts

Author:
Vasily V. Kaichev; Yuriy A. Chesalov; Andrey A. Saraev; Anna M. Tsapina
Source:
Journal of physical chemistry 2019 v.123 no.32 pp. 19668-19680
ISSN:
1932-7455
Subject:
Fourier transform infrared spectroscopy; X-ray photoelectron spectroscopy; acetates; acetone; active sites; carbon dioxide; carbon monoxide; carbonates; catalysts; cations; chemical bonding; dehydrogenation; formates; gases; nanoparticles; oxidation; oxygen; propane; propylene; titanium dioxide; vanadium; vanadyl ions
Abstract:
... The oxidative and non-oxidative dehydrogenation of propane over a monolayer V₂O₅/TiO₂ catalyst was examined using in situ Fourier transform infrared spectroscopy and pseudo in situ X-ray photoelectron spectroscopy (XPS). It was found that the freshly calcined catalyst contains vanadium in the V⁵⁺ state; however, its treatment in the propane flow leads to the reduction of V⁵⁺ to V³⁺. Simultaneously ...
DOI:
10.1021/acs.jpcc.9b04991

34. Acid-Catalyzed Reactions of Isopropenyl Esters and Renewable Diols: A 100% Carbon Efficient Transesterification/Acetalization Tandem Sequence, from Batch to Continuous Flow

Author:
Davide Rigo; Giulia Fiorani; Alvise Perosa; Maurizio Selva
Source:
ACS sustainable chemistry & engineering 2019 v.7 no.23 pp. 18810-18818
ISSN:
2168-0485
Subject:
acetates; acetone; atmospheric pressure; byproducts; carbon; catalysts; catalytic activity; enols; ethylene glycol; propylene glycol; solvents; transesterification
Abstract:
... A new acid-catalyzed tandem sequence was investigated for the upgrading of renewable 1,2-diols such as propylene glycol (PG) and ethylene glycol (EG), with isopropenyl esters. For example, at 50 °C and in the presence of Amberlyst-15, the reaction of PG with nontoxic isopropenyl acetate allowed an initial irreversible monotransesterification of the diol, releasing acetone which then promoted aceta ...
DOI:
10.1021/acssuschemeng.9b03359

35. Carbon Dioxide Sequestering Ability of Bacterial Carbonic Anhydrase in a Mangrove Soil Microcosm and Its Bio-mineralization Properties

Author:
Vinod Kumar Nathan; Parvathi Ammini
Source:
Water, air, and soil pollution 2019 v.230 no.8 pp. 192
ISSN:
0049-6979
Subject:
Bacillus altitudinis; acetates; acetone; bacteria; biomineralization; calcite; calcium; carbon dioxide; carbon sequestration; carbonate dehydratase; enzyme activity; inoculum; mangrove sediments; mangrove soils; phenol; ribosomal DNA; screening; sequence analysis; soil ecology; soil sterilization; India
Abstract:
... In this study, we attempt to prospect potential bacterial isolates from mangrove sediments of Mangalavanam, Kerala, India, with positive carbonic anhydrase (CA) activity to sequester carbon dioxide by calcium precipitation process. Fifteen bacterial colonies (M1–M15) isolated were screened for their carbonic anhydrase enzyme production potential based on p-nitro phenol acetate assay. Based on the ...
DOI:
10.1007/s11270-019-4229-3

36. Co-production of solvents and organic acids in butanol fermentation by Clostridium acetobutylicum in the presence of lignin-derived phenolics

Author:
Hongzhen Luo; Panli Zheng; Fang Xie; Rongling Yang; Lina Liu; Shuo Han; Yuping Zhao; Muhammad Bilal
Source:
RSC advances 2019 v.9 no.12 pp. 6919-6927
ISSN:
2046-2069
Subject:
Clostridium acetobutylicum; acetates; acetone; biomass; biosynthesis; bottles; butanol; butyrates; ethanol; fermentation; fermenters; lignin; lignocellulose; oleic acid; solvents; vanillic acid; vanillin
Abstract:
... Co-production of solvents (butanol, acetone, and ethanol) and organic acids (butyrate and acetate) by Clostridium acetobutylicum using lignocellulosic biomass as a substrate could further enlarge the application scope of butanol fermentation. This is mainly because solvents and organic acids could be used for production of fine chemicals such as butyl butyrate, butyl oleate, etc. However, many phe ...
DOI:
10.1039/c9ra00325h

37. Diversity of floral scent of tulips

Author:
N. Oyama-Okubo; T. Tsuji
Source:
Acta horticulturae 2019 no.1237 pp. 259-268
ISSN:
0567-7572
Subject:
Citrus; Tulipa; acetates; acetone; acetophenones; anise; benzaldehyde; benzyl alcohol; cineole; color; cultivars; fatty acids; flowers; gas chromatography-mass spectrometry; limonene; linalool; methyl salicylate; odors; phenylethyl alcohol; sensory evaluation; sesquiterpenoids; smell
Abstract:
... Tulips have a variety of floral scents. Although the charm of tulip is a variety of colours and shapes, there are a few fragrant cultivars. When you smell the tulip scent well, you can feel various scents such as citrus-like, honey-like, green-like. We selected 86 cultivars of tulip that have characteristics floral odor. About 183 scent compounds ranging from terpenoids and benzenoids to fatty aci ...
DOI:
10.17660/ActaHortic.2019.1237.34

38. Effect of carboxylic acid crosslinking of cellulose membranes on nanofiltration performance in ethanol and dimethylsulfoxide

Author:
Kübra Konca; P. Zeynep Çulfaz-Emecen
Source:
Journal of membrane science 2019 v.587 pp. 117175
ISSN:
0376-7388
Subject:
acetates; acetone; artificial membranes; carboxylic acids; cellulose; crosslinking; dimethyl sulfoxide; electrostatic interactions; ethanol; gentian violet; leaves; mechanical properties; moieties; nanofiltration; solutes; solvents; sorption
Abstract:
... Cellulose membranes were fabricated via phase inversion using 1-ethyl-3-methylimidazolium acetate as solvent and acetone as volatile cosolvent. 1,2,3,4-butanetetracarboxylic acid was used to partially crosslink the hydroxyl groups of cellulose, thereby changing mechanical properties of the membranes and the interactions with solvents, ethanol and dimethyl sulfoxide, and solutes. Rejection of dyes ...
DOI:
10.1016/j.memsci.2019.117175

39. Effects of alkalinity of ionic liquids on the structure of biomass in pretreatment process

Author:
Chao Liu; Youming Li; Yi Hou
Source:
Wood science and technology 2019 v.53 no.1 pp. 177-189
ISSN:
0043-7719
Subject:
Eucalyptus; Fourier transform infrared spectroscopy; X-ray diffraction; acetates; acetone; alkalinity; biomass; crystal structure; hemicellulose; ionic liquids; lignin; phosphates; scanning electron microscopy; thermal stability; thermogravimetry
Abstract:
... Three basic ionic liquids (BILs), 1,3-dimethyl-imidazole dimethyl phosphate([MMIM][DMP]), 1-butyl-3methylimidazolium acetate([BMIM][Ac]) and 1-ethyl-3-methylimidazolium acetate([EMIM][Ac]), were applied to the pretreatment of eucalyptus biomass under microwave conditions with the decreasing alkalinity order of [EMIM][Ac] > [BMIM][Ac] > [MMIM][DMP]. The results showed that the alkalinity of ionic l ...
DOI:
10.1007/s00226-018-1066-2

40. Essential oil composition of five Nepeta species cultivated in Lithuania and evaluation of their bioactivities, toxicity and antioxidant potential of hydrodistillation residues

Author:
Renata Baranauskienė; Vilma Bendžiuvienė; Ona Ragažinskienė; Petras Rimantas Venskutonis
Source:
Food and chemical toxicology 2019 v.129 pp. 269-280
ISSN:
0278-6915
Subject:
Nepeta cataria; Nepeta nuda; Nepeta sibirica; acetates; acetone; antioxidant activity; beta-caryophyllene; cineole; citronellol; essential oils; free radical scavengers; gas chromatography-mass spectrometry; geranial; hydrodistillation; in vitro studies; toxicity; toxicology; Lithuania
Abstract:
... Essential oils of Nepeta cataria var. citriodora, N. transcaucasica, N. melissifolia, N. sibirica and N. nuda were investigated. The yields of EO were from 0.78 (N. nuda) to 5.94 (N. cataria) mg/g plant dry weight (pdw). In total, 143 compounds were identified and quantified in Nepeta plant EOs by GC-MS/FID. 4aα,7α,7aβ-Nepetalactone (NL) was dominant constituent in N. cataria and N. nuda EO (50.16 ...
DOI:
10.1016/j.fct.2019.04.039

41. Facile fabrication of sheet-on-sheet hierarchical nanostructured Sb/C composite with boosting sodium storage

Author:
Xiaofang Zhang; Feng Li; Ping Wu; Yajing Wang; Junfang Zhang; Yuxin Xie; Yinyan Zhu; Xiaoshu Zhu; Shaohua Wei; Yiming Zhou
Source:
Journal of colloid and interface science 2019 v.545 pp. 200-208
ISSN:
0021-9797
Subject:
acetates; acetone; antimony; carbon; electrochemistry; electrodes; energy; nanosheets; porosity; raw materials; sodium
Abstract:
... Rational design and facile synthesis of two-dimensional (2D) materials still remain a great challenge. Herein, a facile process was proposed to construct 2D porous hybrid nanosheets, with ultrathin antimony nanoplates (with a thickness of ca. 0.5 nm) being anchored on acetone-derived graphene-like carbon porous nanosheets, by an aldol reaction and subsequent carbothermal reduction method using ace ...
DOI:
10.1016/j.jcis.2019.03.029

42. Griseofulvin solvate solid dispersions with synergistic effect against fungal biofilms

Author:
Hisham Al-Obaidi; Radoslaw M. Kowalczyk; Rachith Kalgudi; Mohammed Gulrez Zariwala
Source:
Colloids and surfaces 2019 v.184 pp. 110540
ISSN:
0927-7765
Subject:
Fourier transform infrared spectroscopy; acetates; acetone; biofilm; chloroform; confocal laser scanning microscopy; crystallization; dispersions; enzyme activity; griseofulvin; hydrogen bonding; hyphae; keratinophilic fungi; liquids; methanol; methylcellulose; nuclear magnetic resonance spectroscopy; polyvinylpyrrolidone; silica; solubility; sorption; vapors
Abstract:
... Fungal biofilms are invariably recalcitrant to antifungal drugs and thus can cause recurrent serious infections. The aim of this work was to prepare highly effective form of the antifungal drug griseofulvin using the chloroform solvate embedded into different polymeric matrices. Based on their solid solubility, solvated (chloroform) and non-solvated (methanol and acetone) solid dispersions were pr ...
DOI:
10.1016/j.colsurfb.2019.110540

43. Integration of cell permeabilization and medium engineering for enhanced enantioselective synthesis of ethyl-S-3-hydroxy-3-phenylpropanoate (S-EHPP)

Author:
Md. Mahabubur Rahman Talukder; Puah Sze Min; Choi Won Jae
Source:
Biochemical engineering journal 2019 v.148 pp. 24-28
ISSN:
1369-703X
Subject:
Kluyveromyces marxianus var. lactis; acetates; acetone; biocatalysis; biocatalysts; enantioselective synthesis; engineering; enzymes; isopropyl alcohol; mass transfer; permeability
Abstract:
... Low permeability of microbial cells and mass transfer limitations are major problems for efficient whole-cell biocatalysis. In this work, a method for enhanced enantioselective synthesis of S-EHPP, an intermediate for antidepressant drug fluoxetine via Kluyveromyces lactis whole-cell-catalyzed reduction of ethyl benzoyl acetate (EBA) was developed by the integration of cell permeabilization and me ...
DOI:
10.1016/j.bej.2019.04.020

44. Thermotolerant lipase from Penicillium sp. section Gracilenta CBMAI 1583: Effect of carbon sources on enzyme production, biochemical properties of crude and purified enzyme and substrate specificity

Author:
Daniela Flávia M. Turati; Alex F. Almeida; Cárol C. Terrone; Juliana M.F. Nascimento; César R.F. Terrasan; Gloria Fernandez-Lorente; Benevides C. Pessela; Jose M. Guisan; Eleonora C. Carmona
Source:
Biocatalysis and agricultural biotechnology 2019 v.17 pp. 15-24
ISSN:
1878-8181
Subject:
Penicillium; acetates; acetone; agarose; ammonium chloride; carbon; carboxylic ester hydrolases; dimethyl sulfoxide; effluents; enzyme activity; enzyme kinetics; food industry; heat tolerance; hexane; hydrophobic interaction chromatography; magnesium sulfate; octoxynol; oleic acid; olive oil; pH; pharmaceutical industry; sodium chloride; solvents; substrate specificity; toluene
Abstract:
... In this study, Penicillium sp. section Gracilenta CBMAI 1583 was used to produce lipase under submerged conditions. The enzyme was purified and the biochemical properties of both the crude and purified enzymes were evaluated. Maximum lipase production (1.62 U mL−1) was obtained using olive oil 0.5% (w v−1) after 72 h of cultivation, representing a 90% increase in the lipase initially produced. The ...
DOI:
10.1016/j.bcab.2018.10.002

45. Two‐dimensional NMR analysis of Angiopteris evecta rhizome and improved extraction method for angiopteroside

Author:
Hiroshi Kamitakahara; Tomoki Okayama; Praptiwi; Andria Agusta; Yuki Tobimatsu; Toshiyuki Takano
Source:
Phytochemical analysis 2019 v.30 no.1 pp. 95-100
ISSN:
0958-0344
Subject:
Angiopteris; acetates; acetone; acid insoluble lignin; chemical constituents of plants; ethnobotany; glycosides; lignin; mass spectrometry; methanol; methylene chloride; minimum inhibitory concentration; nitrobenzenes; nuclear magnetic resonance spectroscopy; oxidation; quantum mechanics; rhizomes; solid phase extraction; sugars; surveys; thin layer chromatography; Borneo; Indonesia
Abstract:
... INTRODUCTION: The rhizome of Angiopteris evecta is of academic interest in Kalimantan, Indonesia, from an ethnobotanical perspective. Angiopteroside is a substance of pharmaceutical importance that is found in the rhizome of A. evecta. OBJECTIVE: The aims of this research are to improve the extraction method for angiopteroside from the rhizome, compared to that in a previous report, and to determi ...
DOI:
10.1002/pca.2794

46. Active Site Ensembles Enabled C–C Coupling of CO2 and CH4 for Acetone Production

Author:
Yuntao Zhao; Hua Wang; Jinyu Han; Xinli Zhu; Qingfeng Ge
Source:
Journal of physical chemistry 2018 v.122 no.17 pp. 9570-9577
ISSN:
1932-7455
Subject:
Lewis bases; acetates; acetic acid; acetone; activation energy; active sites; carbon; carbon dioxide; catalysts; density functional theory; energy; methane; moieties; oxygen; production technology; zinc
Abstract:
... The production of acetone through ketonization of acetic acid is both energy intensive and environmentally detrimental, as it emits equimolecular CO₂. Herein, a novel approach for acetone production from CO₂ and CH₄ was proposed through consecutive C–C coupling based on an extensive density functional theory computational study. To realize the consecutive C–C coupling, CeO₂-based catalyst doped wi ...
DOI:
10.1021/acs.jpcc.8b02359

47. Aniline-based catalysts as promising tools to improve analysis of carbonyl compounds through derivatization techniques: preliminary results using dansylacetamidooxyamine derivatization and LC-fluorescence

Author:
Stéphan Houdier; Justine Lévêque; Tiphaine Sabatier; Véronique Jacob; Jean-Luc Jaffrezo
Source:
Analytical and bioanalytical chemistry 2018 v.410 no.27 pp. 7031-7042
ISSN:
1618-2642
Subject:
acetates; acetone; amines; aqueous solutions; benzaldehyde; carbonyl compounds; catalysts; catalytic activity; derivatization; detection limit; formaldehyde; nitrogen; protons; reaction mechanisms; snow; snowmelt; sorbents
Abstract:
... Derivatization techniques based on α-effect amines and H⁺ catalysis are commonly used for the measurement of carbonyl compounds (CCs), whether in environmental, food, or biological samples. Here, we investigated the potential of aniline-based catalysts to improve derivatization rates of selected carbonyls by using dansylacetamidooxyamine (DNSAOA) as a reagent. Kinetic experiments were performed in ...
DOI:
10.1007/s00216-018-1304-3

48. Cellulose membranes for organic solvent nanofiltration

Author:
F.M. Sukma; P.Z. Çulfaz-Emecen
Source:
Journal of membrane science 2018 v.545 pp. 329-336
ISSN:
0376-7388
Subject:
acetates; acetone; artificial membranes; cellulose; coagulation; drying; ethanol; evaporation; gentian violet; hydrogen bonding; nanofiltration; solvents
Abstract:
... Cellulose membranes were fabricated by phase inversion from solutions of cellulose in 1-ethyl-3-methylimidazolium acetate ([EMIM]OAc) as solvent and acetone as volatile cosolvent. The rejection of Bromothymol Blue (624Da) in ethanol increased and the permeance decreased by increasing the cellulose concentration in the solution prior to coagulation, either by having more cellulose in the starting s ...
DOI:
10.1016/j.memsci.2017.09.080

49. Development and optimization of gas chromatography coupled to high resolution mass spectrometry based method for the sensitive determination of Dechlorane plus and related norbornene-based flame retardants in food of animal origin

Author:
Jekaterina Rjabova; Arturs Viksna; Dzintars Zacs
Source:
Chemosphere 2018 v.191 pp. 597-606
ISSN:
0045-6535
Subject:
acetates; acetone; animal-based foods; cyclohexanes; energy; fish products; flame retardants; gas chromatography; hexane; isomers; liver; mass spectrometry; silica gel; solid phase extraction; solvents; toluene
Abstract:
... An analytical method has been developed for the trace determination of 10 dechlorane-related compounds (DRCs) in food products by gas chromatography – high resolution mass spectrometry (GC-HRMS). The highest sensitivity of this instrumental analysis method was achieved by selection of the GC column type, optimization of the heated zones within the instrument, and adjusting the electron impact ener ...
DOI:
10.1016/j.chemosphere.2017.10.095

50. Effects of nutritional enrichment on acid production from degenerated (non-solventogenic) Clostridium acetobutylicum strain M5

Author:
Ji Eun Woo; Sang Yup Lee; Yu-Sin Jang
Source:
Han'guk Ŭngyong Saengmyŏng Hwahakhoe chi = 2018 v.61 no.4 pp. 469-472
ISSN:
1738-2203
Subject:
Clostridium acetobutylicum; acetates; acetone; batch fermentation; biomass; butanol; butyrates; culture media; genes; plasmids; solvents
Abstract:
... Clostridium acetobutylicum has been used as a microbial platform for the production of butanol, acetone, and butyrate from biomass. This study examined the effect of nutritional enrichment on the production of acetate and butyrate by C. acetobutylicum in culture, and tested whether this nutritional change could shift metabolic flux in these microbial cells. The degenerated (non-solventogenic) C. a ...
DOI:
10.1007/s13765-018-0372-6

51. Improvement of butanol production in Clostridium acetobutylicum through enhancement of NAD(P)H availability

Author:
Feng Qi; Chandresh Thakker; Fayin Zhu; Matthew Pena; Ka-Yiu San; George N. Bennett
Source:
Journal of industrial microbiology & biotechnology 2018 v.45 no.11 pp. 993-1002
ISSN:
1367-5435
Subject:
Clostridium acetobutylicum; NAD(P)H oxidase (H2O2-forming); NADP (coenzyme); acetates; acetone; butanol; butyrates; carbon; ethanol; genes; hydrogen; metabolites
Abstract:
... Clostridium acetobutylicum is a natural producer of butanol, butyrate, acetone and ethanol. The pattern of metabolites reflects the partitioning of redox equivalents between hydrogen and carbon metabolites. Here the exogenous genes of ferredoxin-NAD(P)⁺ oxidoreductase (FdNR) and trans-enoyl-coenzyme reductase (TER) are introduced to three different Clostridium acetobutylicum strains to investigate ...
DOI:
10.1007/s10295-018-2068-7

52. Influence of chloride on the 185 nm advanced oxidation process

Author:
Laith Furatian; Madjid Mohseni
Source:
Chemosphere 2018 v.199 pp. 263-268
ISSN:
0045-6535
Subject:
acetates; acetone; chlorides; chlorine; free radical scavengers; hydroxyl radicals; ionic strength; lamps; oxidation; ozone; photolysis; photons; water treatment
Abstract:
... The use of 185 nm radiation from a conventional low pressure mercury lamp generates the hydroxyl radical (OH) from the photolysis of water and offers an advanced oxidation process (AOP) for water treatment that does not require chemical addition. However, the influence of the water matrix on the process differs substantially from that of other ultraviolet and ozone based processes. In particular c ...
DOI:
10.1016/j.chemosphere.2018.01.138

53. Methylimidazolium-based ionic liquids influence the biobutanol production by solvent-producing Clostridium

Author:
Wen-Hsing Chen; Yi-Hxuan Li
Source:
International biodeterioration & biodegradation 2018 v.129 pp. 163-169
ISSN:
0964-8305
Subject:
Clostridium saccharoperbutylacetonicum; acetates; acetone; biobutanol; biomass; butanol; cell growth; chlorides; ethanol; fermentation; hormesis; hydrolysates; ionic liquids; lignocellulose; phosphates
Abstract:
... Ionic liquids (ILs) used to pretreat lignocellulosic biomass could stimulate or be detrimental to the subsequent fermentation process when the ILs retained in the biomass hydrolysate. This study aimed to investigate if the presence of the ILs including 1-allyl-3-methylimidazolium chloride ([AMIM][Cl]), 1-butyl-3-methylimidazolium chloride ([BMIM][Cl]), 1-ethyl-3-methylimidazolium chloride ([EMIM][ ...
DOI:
10.1016/j.ibiod.2018.02.007

54. Monitoring of selected skin- and breath-borne volatile organic compounds emitted from the human body using gas chromatography ion mobility spectrometry (GC-IMS)

Author:
Paweł Mochalski; Helmut Wiesenhofer; Maria Allers; Stefan Zimmermann; Andreas T. Güntner; Nicolay J. Pineau; Wolfgang Lederer; Agapios Agapiou; Christopher A. Mayhew; Veronika Ruzsanyi
Source:
Journal of chromatography 2018 v.1076 pp. 29-34
ISSN:
1570-0232
Subject:
European Union; acetates; acetic acid; acetone; acrolein; alcohols; benzaldehyde; butyrates; chemical analysis; containers; crime; detection limit; formates; gas chromatography; humans; moieties; monitoring; people; propionic acid; shipping; spectrometers; spectroscopy; statistical analysis; trucks; volatile organic compounds
Abstract:
... Human smuggling and associated cross-border crimes have evolved as a major challenge for the European Union in recent years. Of particular concern is the increasing trend of smuggling migrants hidden inside shipping containers or trucks. Therefore, there is a growing demand for portable security devices for the non-intrusive and rapid monitoring of containers to detect people hiding inside. In thi ...
DOI:
10.1016/j.jchromb.2018.01.013

55. Noninvasive wearable sensor for indirect glucometry

Author:
Gleb Zilberstein; Roman Zilberstein; Uriel Maor; Pier Giorgio Righetti
Source:
Electrophoresis 2018 v.39 no.18 pp. 2344-2350
ISSN:
0173-0835
Subject:
acetates; acetone; algorithms; blood glucose; breakfast; carbon dioxide; coatings; electrophoresis; females; films (materials); glass; glucose; graphs; heart rate; lactic acid; lunch; males; metabolites; monitoring; multivariate analysis; polymers; potassium; pressing; pyruvic acid; salts; sodium; sweat
Abstract:
... A noninvasive mini‐sensor for blood glucose concentration assessment has been developed. The monitoring is performed by gently pressing a wrist or fingertip onto the chemochromic mixture coating a thin glass or polymer film positioned on the back panel of a smart watch with PPG/HRM (photoplethysmographic/heart rate monitoring sensor). The various chemochromic components measure the absolute values ...
DOI:
10.1002/elps.201700424

56. Preparation of In(OH)3 and In2O3 Nanorods through a Novel Hydrothermal Method and the Effect of Sn Dopant on Crystal Structures

Author:
Jingchuo Wang; Fan Zhang; Yujun Wang; Guangsheng Luo
Source:
Industrial & engineering chemistry process design and development 2018 v.57 no.8 pp. 2882-2889
ISSN:
1520-5045
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; absorption; acetates; acetone; aqueous solutions; crystal structure; hot water treatment; indium; nanocrystals; nanoparticles; nanorods; pH; process design; sodium acetate; sodium hydroxide; temperature; tin
Abstract:
... Indium hydroxide (In(OH)₃) nanorods and Sn-doped indium oxyhydroxide (InOOH) nanoparticles were synthesized through the hydrothermal method in an aqueous solution. Sodium hydroxide (NaOH) was introduced to adjust the pH value, and sodium acetate (CH₃COONa) was employed as the inducer to accelerate the growth along the preferential orientation. Cubic In(OH)₃ was synthesized at pH values ranging fro ...
DOI:
10.1021/acs.iecr.7b05085

57. A detailed spectroscopic analysis of the growth of oxy-carbon species on the surface of Pt/Al2O3 during propane oxidation

Author:
Casey P. O'Brien; Ivan C. Lee
Source:
Journal of catalysis 2017 v.347 pp. 1-8
ISSN:
0021-9517
Subject:
acetates; acetone; aluminum oxide; carbon dioxide production; catalysts; combustion; gases; nanoparticles; platinum; propane; reflectance; spectral analysis; temperature
Abstract:
... The growth of oxygenated carbonaceous (oxy-carbon) species on the surface of Pt/Al2O3 during total oxidation of propane is analyzed in detail—including their composition, their location on the catalyst surface, their reactivity, and their role in the propane oxidation mechanism—by in situ diffuse reflectance infrared Fourier-transform spectroscopy (DRIFTS). Platinum nanoparticles catalyze the tran ...
DOI:
10.1016/j.jcat.2016.12.021

58. Adsorption Mechanisms of Typical Carbonyl-Containing Volatile Organic Compounds on Anatase TiO2 (001) Surface: A DFT Investigation

Author:
Yao Meijing; Ji Yuemeng; Wang Honghong; Ao Zhimin; Li Guiying; An Taicheng
Source:
The Journal of Physical Chemistry C 2017 v.121 no.25 pp. 13717-13722
ISSN:
1932-7455
Subject:
acetaldehyde; acetates; acetone; active sites; adsorption; air pollutants; air pollution; catalysts; energy; methodology; models; moieties; titanium dioxide; volatile organic compounds
Abstract:
... The carbonyl-containing compounds (CCs) are typical volatile organic compounds (VOCs) and ubiquitously present in the environment. Therefore, the adsorption structures and properties of typical CCs on the anatase TiO₂ (001) surface were investigated systematically with density functional theory (DFT) to understand their further catalytic degradation mechanisms. The adsorption mechanisms show that ...
DOI:
10.1021/acs.jpcc.7b02964

59. Antibacterial activities of the phytochemicals-characterized extracts of Callistemon viminalis, Eucalyptus camaldulensis and Conyza dioscoridis against the growth of some phytopathogenic bacteria

Author:
Mervat EL-Hefny; Nader A. Ashmawy; Mohamed Z.M. Salem; Abdelfattah Z.M. Salem
Source:
Microbial pathogenesis 2017 v.113 pp. 348-356
ISSN:
0882-4010
Subject:
Agrobacterium radiobacter; Callistemon viminalis; Conyza; Dickeya; Eucalyptus camaldulensis; Ralstonia solanacearum; acetates; acetone; aerial parts; antibacterial properties; bark; butanol; camphor; cineole; essential oils; flowers; hydroxymethylfurfural; menthol; minimum inhibitory concentration; palmitic acid; plant pathogenic bacteria; pyrogallol; shikimic acid
Abstract:
... Three bacterial isolates were isolated from infected potato tubers showing soft and brown rots like symptoms as well as one isolate from infected peach tree showing crown gall symptom. The morphological, biochemical and molecular assays proved that bacterial isolates belonging to Pectobacterium carotovorum subsp. carotovorum, Ralstonia solanacearum, Dickeya spp. and Agrobacterium tumefaciens. The ...
DOI:
10.1016/j.micpath.2017.11.004

60. Application of partially concentrated Candida rugosa lipase in the enzymatic synthesis of geranyl acetate in organic solvent

Author:
B.H. Rosa; G.S. Silva; G.J.A. Conceição; R.A. Carvalho; E. Aguiar-Oliveira; R.R. Maldonado; E.S. Kamimura
Source:
Biocatalysis and agricultural biotechnology 2017 v.12 pp. 90-95
ISSN:
1878-8181
Subject:
Candida rugosa; acetates; acetone; carboxylic ester hydrolases; flavor; freeze drying; geraniol; hexane; solvents; synthesis; vinyl acetate
Abstract:
... Esters of terpinyl alcohols are substances used for adding flavor to several products because of their organoleptic properties. The enzymatic synthesis of these substances is more eco-friendly than conventional chemical synthesis. The aim of this study was to evaluate the concentration of Candida rugosa lipase by precipitation with acetone followed by lyophilization and application of the enzyme i ...
DOI:
10.1016/j.bcab.2017.09.005

61. Biodegradation of isopropanol and acetone under denitrifying conditions by Thauera sp. TK001 for nitrate-mediated microbially enhanced oil recovery

Author:
Tekle Tafese Fida; Fatma Gassara; Gerrit Voordouw
Source:
Journal of hazardous materials 2017 v.334 pp. 68-75
ISSN:
0304-3894
Subject:
Thauera; acetates; acetone; biodegradation; bioreactors; denitrification; denitrifying bacteria; glucose; isopropyl alcohol; molasses; nitrates; oil fields; oils; solvents
Abstract:
... Amendment of reservoir fluid with injected substrates can enhance the growth and activity of microbes. The present study used isopropyl alcohol (IPA) or acetone to enhance the indigenous anaerobic nitrate-reducing bacterium Thauera sp. TK001. The strain was able to grow on IPA or acetone and nitrate. To monitor effects of strain TK001 on oil recovery, sand-packed columns containing heavy oil were ...
DOI:
10.1016/j.jhazmat.2017.03.061

62. Comparative Kinetic Monte Carlo Study of Acetic Acid Decomposition to Surface Carbon Species and Undesirable Byproducts on Pd(100) and Pd/Au(100) from Density Functional Theory-Based Calculations

Author:
Huang Yanping; Dong Xiuqin; Yu Yingzhe; Zhang Minhua
Source:
The Journal of Physical Chemistry C 2017 v.121 no.48 pp. 26733-26741
ISSN:
1932-7455
Subject:
Monte Carlo method; acetaldehyde; acetates; acetic acid; acetone; adsorption; byproducts; carbon; carbon dioxide; catalysts; decarboxylation; ethylene; gold; hydrogen; methane; methanol; methodology; palladium; vinyl acetate
Abstract:
... Acetic acid decomposition on Pd(100) and Pd/Au(100) during vinyl acetate (VA) synthesis from ethylene acetoxylation is the primary source of such undesirable byproducts as methanol (CH₃OH), acetaldehyde (CH₃CHO), ketene (CH₂CO), acetone (CH₃COCH₃), and methane (CH₄), and also one possible source of surface carbon formation, which will lead to the deactivation of the catalyst. In this work, density ...
DOI:
10.1021/acs.jpcc.7b05072

63. Critical Assessment of Using an Ionic Liquid as Entrainer via Extractive Distillation

Author:
Hung-Hsin Chen; Meng-Kai Chen; Bor-Chang Chen; I-Lung Chien
Source:
Industrial & engineering chemistry process design and development 2017 v.56 no.27 pp. 7768-7782
ISSN:
1520-5045
Subject:
acetates; acetone; boiling point; distillation; ionic liquids; isopropyl alcohol; methanol; process design; temperature
Abstract:
... Ionic liquids (ILs) have received much attention in the last two decades. One of the important applications is to use this relatively new class of compounds for the separation of azeotropic mixtures via extractive distillation. In this paper, overall extractive distillation processes of two azeotropic separation systems using a favorable ionic liquid as entrainer are rigorously developed. The opti ...
DOI:
10.1021/acs.iecr.7b01223

64. Doping-assisted low-pressure photoionization mass spectrometry for the real-time detection of lung cancer-related volatile organic compounds

Author:
Zhen Li; Ce Xu; Jinian Shu; Bo Yang; Yao Zou
Source:
Talanta 2017 v.165 pp. 98-106
ISSN:
0039-9140
Subject:
1-propanol; acetates; acetone; breath tests; calibration; ions; lung neoplasms; lungs; mass spectrometry; methylene chloride; nitrogen; relative humidity; volatile organic compounds
Abstract:
... Real-time detection of lung cancer-related volatile organic compounds (VOCs) is a promising, non-intrusive technique for lung cancer (LC) prescreening. In this study, a novel method was designed to enhance the detection selectivity and sensitivity of LC-related polar VOCs by dichloromethane (CH2Cl2) doping-assisted low-pressure photoionization mass spectrometry (LPPI-MS). Compared with conventiona ...
DOI:
10.1016/j.talanta.2016.12.039

65. Effectively enhancing acetone concentration and acetone/butanol ratio in ABE fermentation by a glucose/acetate co-substrate system incorporating with glucose limitation and C. acetobutylicum/S. cerevisiae co-culturing

Author:
Hongzhen Luo; Jingshu Zhang; Hao Wang; Rui Chen; Zhongping Shi; Xin Li; Jian Ding
Source:
Biochemical engineering journal 2017 v.118 pp. 132-142
ISSN:
1369-703X
Subject:
NAD (coenzyme); acetates; acetone; biomass; butanol; carbon; energy; fermentation; glucose
Abstract:
... A novel glucose/acetate co-substrate system incorporating with C. acetobutylicum/S. cerevisiae co-culturing and glucose limitation was proposed and applied in ABE fermentations by C. acetobutylicum. With this strategy, acetone production was enhanced while NADH dependent butanol synthesis rate was adequately restricted by glucose limitation via decreasing initial glucose concentration in the mediu ...
DOI:
10.1016/j.bej.2016.12.003

66. Electrochemical CO2 Reduction to Fuels Using Pt/CNT Catalysts Synthesized in Supercritical Medium

Author:
Jiménez Carlos; García Jesús; Camarillo Rafael; Martínez Fabiola; Rincón Jesusa
Source:
Energy & Fuels 2017 v.31 no.3 pp. 3038-3046
ISSN:
1520-5029
Subject:
acetates; acetone; carbon dioxide; carbon nanotubes; catalysts; electrochemistry; electrolytes; formic acid; fuels; gases; isopropyl alcohol; methane; methanol; nanoparticles; platinum; polymers; temperature
Abstract:
... The electrochemical reduction of CO₂ in the gas phase has been carried out in a solid polymer electrolyte type cell (25 cm² geometric area) in continuous operation mode using carbon nanotube-supported platinum catalysts (Pt/CNT). The main novelty of this work relies on the use of supercritical media (supercritical CO₂) for Pt deposition on CNT. Supercritical synthesis has allowed obtaining small P ...
DOI:
10.1021/acs.energyfuels.6b03017

67. Metabolic engineering for isopropanol production by an engineered cyanobacterium, Synechococcus elongatus PCC 7942, under photosynthetic conditions

Author:
Yasutaka Hirokawa; Yudai Dempo; Eiichiro Fukusaki; Taizo Hanai
Source:
Journal of bioscience and bioengineering 2017 v.123 no.1 pp. 39-45
ISSN:
1389-1723
Subject:
Escherichia coli; Synechococcus sp. PCC 7942; acetates; acetone; acetyl coenzyme A; anaerobic conditions; biochemical pathways; biofuels; carbon dioxide; genes; intermediate product; isopropyl alcohol; metabolic engineering; phosphates; photosynthesis
Abstract:
... Cyanobacteria engineered for production of biofuels and biochemicals from carbon dioxide represent a promising area of research in relation to a sustainable economy. Previously, we have succeeded in producing isopropanol from cellular acetyl-CoA by means of Synechococcus elongatus PCC 7942 into which a synthetic metabolic pathway was introduced. The isopropanol production by this synthetic metabol ...
DOI:
10.1016/j.jbiosc.2016.07.005

68. Natural Attenuation of Nonionic Surfactants Used in Hydraulic Fracturing Fluids: Degradation Rates, Pathways, and Mechanisms

Author:
Heyob Katie M.; Blotevogel Jens; Brooker Michael; Evans Morgan V.; Lenhart John J.; Wright Justin; Lamendella Regina; Borch Thomas; Mouser Paula J.
Source:
Environmental Science & Technology 2017 v.51 no.23 pp. 13985-13994
ISSN:
1520-5851
Subject:
Firmicutes; acetates; acetone; additives; aldehydes; anaerobic conditions; biodegradability; biodegradation; bioremediation; biotransformation; carboxylic acids; corrosion; emulsifiers; environmental fate; fermentation; glycols; hydraulic fracturing; isomers; metabolites; metagenomics; molecular weight; multigene family; natural gas; nonionic surfactants; oils; polypropylenes; prediction; propanediol dehydratase; ribosomal RNA
Abstract:
... Hydraulic fracturing fluids are injected into shales to extend fracture networks that enhance oil and natural gas production from unconventional reservoirs. Here we evaluated the biodegradability of three widely used nonionic polyglycol ether surfactants (alkyl ethoxylates (AEOs), nonylphenol ethoxylates (NPEOs), and polypropylene glycols (PPGs)) that function as weatherizers, emulsifiers, wetting ...
DOI:
10.1021/acs.est.7b01539

69. Preparation of graphene oxide–cellulose acetate nanocomposite membrane for high-flux desalination

Author:
Yexun Shi; Chang Li; Dafang He; Liming Shen; Ningzhong Bao
Source:
Journal of materials science 2017 v.52 no.22 pp. 13296-13306
ISSN:
0022-2461
Subject:
acetates; acetone; desalination; graphene; hydrophilicity; nanocomposites; porosity
Abstract:
... Graphene oxide–cellulose acetate (GO–CA) nanocomposite membranes have been successfully prepared via phase inversion method. The GO sheets were firstly well dispersed in formamide, and then the solution was mixed with acetone containing CA so as to confirm the GO sheets well dispersed in the final GO–CA nanocomposite membranes. All the GO–CA nanocomposite membranes are composed of dense skin layer ...
DOI:
10.1007/s10853-017-1403-0

70. Rapid method for the quantification of 13 Sulphonamides in milk by conventional high-performance liquid chromatography with diode array ultraviolet detection using a column packed with core-shell particles

Author:
Antonio Armentano; Simona Summa; Sonia Lo Magro; Carmen Palermo; Donatella Nardiello; Diego Centonze; Marilena Muscarella
Source:
Journal of chromatography 2017 pp. -
ISSN:
0021-9673
Subject:
acetates; acetone; acetonitrile; chloroform; diodes; drug residues; hexane; high performance liquid chromatography; maximum residue limits; methanol; milk; normal values; pH; rapid methods; raw milk; sulfonamides
Abstract:
... In the present study, a column packed with core-shell particles was used for the separation and the quantification of 13 sulphonamides in milk by conventional high-performance liquid chromatography coupled with diode array ultraviolet detection (HPLC/UV-DAD). Preliminary experiments were carried out to investigate selectivity of different stationary phases. Best results were achieved using a C18 c ...
DOI:
10.1016/j.chroma.2017.11.015

71. Semiautomatic sequential extraction of polycyclic aromatic hydrocarbons and elemental bio-accessible fraction by accelerated solvent extraction on a single particulate matter sample

Author:
Maria Luisa Astolfi; Patrizia Di Filippo; Alessandra Gentili; Silvia Canepari
Source:
Talanta 2017 pp. -
ISSN:
0039-9140
Subject:
acetates; acetone; aluminum; arsenic; cadmium; chromium; copper; cylinders; filters; iron; lead; manganese; methylene chloride; mineralization; nickel; pH; particulates; polycyclic aromatic hydrocarbons; polytetrafluoroethylene; selenium; solvents; steel; vanadium; wet digestion method; zinc
Abstract:
... We describe the optimization and validation of a sequential extractive method for the determination of the polycyclic aromatic hydrocarbons (PAHs) and elements (Al, As, Cd, Cr, Cu, Fe, Mn, Ni, Pb, Se, V and Zn) that are chemically fractionated into bio-accessible and mineralized residual fractions on a single particulate matter filter. The extraction is performed by automatic accelerated solvent e ...
DOI:
10.1016/j.talanta.2017.06.072

72. Value-additive utilization of agro-biomass: preparation of cellulose triacetate directly from rice straw as well as other cellulosic materials

Author:
Amita Sharma; Santosh Kumar Giri; K. P. Ravindranathan Kartha; Rajender S. Sangwan
Source:
RSC advances 2017 v.7 no.21 pp. 12745-12752
ISSN:
2046-2069
Subject:
acetates; organochlorine compounds; filtration; sulfonic acids; value added; acetone; pyridines; cellulose; cellulosic materials; silica; toxic substances; rice straw; biomass; cotton; neutralization; acetic acid; aromatic compounds; acetic anhydride; catalysts; methane; acetylation; biofuels; coproducts
Abstract:
... Non-forage crop residues like rice straw are among the most important and pertinent renewable biomass available for utilization for producing biofuels, specialty chemicals, aromatics etc. Recovery of cellulose from them and its processing for products are two key steps of value addition to these materials that are available in abundance. Of these, rice straw is perhaps the most recalcitrant of all ...
DOI:
10.1039/c7ra00078b

73. Acetone production with metabolically engineered strains of Acetobacterium woodii

Author:
Sabrina Hoffmeister; Marzena Gerdom; Frank R. Bengelsdorf; Sonja Linder; Sebastian Flüchter; Hatice Öztürk; Wilfried Blümke; Antje May; Ralf-Jörg Fischer; Hubert Bahl; Peter Dürre
Source:
Metabolic engineering 2016 v.36 pp. 37-47
ISSN:
1096-7176
Subject:
Acetobacterium woodii; Clostridium acetobutylicum; acetates; acetone; bacteria; biomass; bioreactors; continuous fermentation; fossils; metabolic engineering; oils; operon; petroleum; promoter regions
Abstract:
... Expected depletion of oil and fossil resources urges the development of new alternative routes for the production of bulk chemicals and fuels beyond petroleum resources. In this study, the clostridial acetone pathway was used for the formation of acetone in the acetogenic bacterium Acetobacterium woodii. The acetone production operon (APO) containing the genes thlA (encoding thiolase A), ctfA/ctfB ...
DOI:
10.1016/j.ymben.2016.03.001

74. An experimental and numerical model for the release of acetone from decomposing EVA containing aluminium, magnesium or calcium hydroxide fire retardants

Author:
Fiona Hewitt; Diana Eid Rhebat; Artur Witkowski; T. Richard Hull
Source:
Polymer degradation and stability 2016 v.127 pp. 65-78
ISSN:
0141-3910
Subject:
acetates; acetic acid; acetone; calcium hydroxide; flame retardants; kinetics; magnesium hydroxide; mathematical models; polymers; pyrolysis
Abstract:
... Recent studies have identified acetone as an unexpected pyrolysis product of EVA containing aluminium or magnesium hydroxide fire retardants. It is thought that the freshly formed, open-pored, metal oxide, a thermal decomposition product of the metal hydroxide, traps acetic acid released from EVA and catalyses its conversion to acetone. Such a ketonisation reaction is well-established but the inte ...
DOI:
10.1016/j.polymdegradstab.2016.01.007

75. Application of finite inverse gas chromatography in hypromellose acetate succinate-water-acetone systems

Author:
Sheng-Wei Chiu; Derek R. Sturm; Justin D. Moser; Ronald P. Danner
Source:
Journal of chromatography 2016 v.1466 pp. 166-172
ISSN:
0021-9673
Subject:
acetates; acetone; gas chromatography; glass transition temperature; manufacturing; models; polymers; prediction; solvents; spray drying; succinic acid; thermodynamics
Abstract:
... A modification of a GC was developed to investigate both infinitely dilute and finite concentrations of solvents in polymers. Thermodynamic properties of hypromellose acetate succinate (HPMCAS-L)-acetone-water systems are important for the optimization of spray-drying processes used in pharmaceutical manufacturing of solid dispersion formulations. These properties, at temperatures below the glass ...
DOI:
10.1016/j.chroma.2016.09.017

76. Cellulose carboxylate/tosylate mixed esters: Synthesis, properties and shaping into microspheres

Author:
Daniela C. Ferreira; Gustavo S. Bastos; Annett Pfeifer; Thomas Heinze; Omar A. El Seoud
Source:
Carbohydrate polymers 2016 v.152 pp. 79-86
ISSN:
0144-8617
Subject:
acetates; acetone; acylation; cellulose; saponification; spectroscopy; trimethylamine
Abstract:
... Cellulose carboxylate/tosylate mixed esters (Cel-Carboxy/Ts) were synthesized with constant degree of tosylation, DSTs=0.98 and variable degree of acylation, DSCarboxy; acetate, butanoate, and hexanoate. The tosylate (Cel-Ts) was prepared by reacting cellulose with tosyl chloride in presence of trimethylamine. The mixed esters were obtained by reacting Cel-Ts with carboxylic acid anhydride. The de ...
DOI:
10.1016/j.carbpol.2016.06.075

77. Changes in the metabolome of rats after exposure to arginine and N-carbamylglutamate in combination with diquat, a compound that causes oxidative stress, assessed by ¹H NMR spectroscopy

Author:
Guangmang Liu; Liang Xiao; Wei Cao; Tingting Fang; Gang Jia; Xiaoling Chen; Hua Zhao; Caimei Wu; Jing Wang
Source:
Food & function 2016 v.7 no.2 pp. 964-974
ISSN:
2042-650X
Subject:
3-hydroxybutyric acid; acetates; acetone; alanine; allantoin; alpha-ketoglutaric acid; amino acid metabolism; animal production; arginine; asparagine; body weight; citrates; citrulline; creatinine; death; diquat; energy metabolism; ethanol; growth retardation; intestinal microorganisms; lactic acid; low density lipoprotein; lysine; metabolome; metabolomics; nicotinamide; nuclear magnetic resonance spectroscopy; ornithine; oxidative stress; phenylalanine; propionic acid; pyruvic acid; rats; threonine; trigonelline; tyrosine; urea; urine; very low density lipoprotein
Abstract:
... Numerous factors can induce oxidative stress in animal production and lead to growth retardation, disease, and even death. Arginine and N-carbamylglutamate can alleviate the effects of oxidative stress. However, the systematic changes in metabolic biochemistry linked to oxidative stress and arginine and N-carbamylglutamate treatment remain largely unknown. This study aims to examine the effects of ...
DOI:
10.1039/c5fo01486g

78. Chemical Composition of the Essential Oil of Trianthema portulacastrum L. Aerial Parts and Potential Antimicrobial and Phytotoxic Activities of its Extract

Author:
A.M. Abd El-Gawad; A.G. El Gendy; A.I. Elshamy; E.A. Omer
Source:
Journal of essential oil-bearing plants 2016 v.19 no.7 pp. 1684-1692
ISSN:
0976-5026
Subject:
Brassica tournefortii; Cenchrus; Lactuca sativa; Trianthema portulacastrum; acetates; acetone; aerial parts; allelochemicals; allelopathy; antibacterial properties; antifungal properties; chemical composition; diterpenoids; essential oils; gas chromatography; germination; mass spectrometry; monoterpenoids; noxious weeds; oils; phytotoxicity; plant extracts; sesquiterpenoids
Abstract:
... The essential oil of the aerial parts of Trianthema portulacastrum L. was analyzed by gas chromatography/mass spectrometry. Fourty four compounds were identified, representing 92.27% of the oil. Terpenes represent the major constituents (72.98%) including monoterpenes (35.69%), sesquiterpenes (30.75%) and diterpene derivates (6.54%). The major chemical constituents were hexahydro-farnesyl acetone ...
DOI:
10.1080/0972060X.2016.1205523

79. Determination of Tocopherol Using Reduced Graphene Oxide-Nafion Hybrid-Modified Electrode in Pharmaceutical Capsules and Vegetable Oil Samples

Author:
Hayati Filik; Asiye Aslıhan Avan; Sevda Aydar; Şeyda Çakar
Source:
Food analytical methods 2016 v.9 no.6 pp. 1745-1753
ISSN:
1936-9751
Subject:
acetates; acetone; alpha-tocopherol; ambient temperature; analytical methods; ascorbic acid; beverages; detection limit; drug formulations; electrochemistry; electrodes; graphene; ionic liquids; nanocomposites; oxidation; vegetable oil
Abstract:
... The Nafion/graphene nanocomposite electrodes showed excellent electrochemical reactivity toward the oxidation of α-tocopherol, which permitted the highly sensitive detection of α-tocopherol. The optimal experimental conditions for the oxidation of α-tocopherol were achieved in acetone/acetate buffer solution and acetone/room temperature ionic liquid solution. The oxidation peak current of α-tocoph ...
DOI:
10.1007/s12161-015-0353-x

80. Enhancing acetone biosynthesis and acetone–butanol–ethanol fermentation performance by co-culturing Clostridium acetobutylicum/Saccharomyces cerevisiae integrated with exogenous acetate addition

Author:
Hongzhen Luo; Laibing Ge; Jingshu Zhang; Jian Ding; Rui Chen; Zhongping Shi
Source:
Bioresource technology 2016 v.200 pp. 111-120
ISSN:
0960-8524
Subject:
Clostridium acetobutylicum; NAD (coenzyme); Saccharomyces cerevisiae; acetates; acetone; amino acids; biosynthesis; butanol; fermentation; fermentation industry; glucose
Abstract:
... Acetone is the major by-product in ABE fermentations, most researches focused on increasing butanol/acetone ratio by decreasing acetone biosynthesis. However, economics of ABE fermentation industry strongly relies on evaluating acetone as a valuable platform chemical. Therefore, a novel ABE fermentation strategy focusing on bio-acetone production by co-culturing Clostridium acetobutylicum/Saccharo ...
DOI:
10.1016/j.biortech.2015.09.116

81. Fermentation and genomic analysis of acetone-uncoupled butanol production by Clostridium tetanomorphum

Author:
Fuyu Gong; Guanhui Bao; Chunhua Zhao; Yanping Zhang; Yin Li; Hongjun Dong
Source:
Applied microbiology and biotechnology 2016 v.100 no.3 pp. 1523-1529
ISSN:
0175-7598
Subject:
Clostridium tetanomorphum; acetates; acetone; butanol; butyrates; ethanol; fermentation; genes; genetic databases; genomics; pH; paraquat; sequence analysis
Abstract:
... In typical acetone–butanol–ethanol (ABE) fermentation, acetone is the main by-product (50 % of butanol mass) of butanol production, resulting in a low yield of butanol. It is known that some Clostridium tetanomorphum strains are able to produce butanol without acetone in nature. Here, we described that C. tetanomorphum strain DSM665 can produce 4.16 g/L butanol and 4.98 g/L ethanol at pH 6.0, and ...
DOI:
10.1007/s00253-015-7121-0

82. High acetone–butanol–ethanol production in pH-stat co-feeding of acetate and glucose

Author:
Ming Gao; Yukihiro Tashiro; Qunhui Wang; Kenji Sakai; Kenji Sonomoto
Source:
Journal of bioscience and bioengineering 2016 v.122 no.2 pp. 176-182
ISSN:
1389-1723
Subject:
Clostridium saccharoperbutylacetonicum; acetates; acetone; butanol; enzymes; glucose; pH; phosphates
Abstract:
... We previously reported the metabolic analysis of butanol and acetone production from exogenous acetate by ¹³C tracer experiments (Gao et al., RSC Adv., 5, 8486–8495, 2015). To clarify the influence of acetate on acetone–butanol–ethanol (ABE) production, we first performed an enzyme assay in Clostridium saccharoperbutylacetonicum N1-4. Acetate addition was found to drastically increase the activiti ...
DOI:
10.1016/j.jbiosc.2016.01.013

83. Optimization of Solketalacetin Synthesis as a Green Fuel Additive from Ketalization of Monoacetin with Acetone

Author:
Gorji Yadollah M.; Ghaziaskar Hassan S.
Source:
Industrial & Engineering Chemistry Research 2016 v.55 no.25 pp. 6904-6910
ISSN:
1520-5045
Subject:
acetates; acetic acid; acetone; catalysts; chemistry; engineering; experimental design; fuels; glycerol; response surface methodology; temperature
Abstract:
... An economical and easy to scale up method for glycerol conversion to solketalacetin (i.e., (2,2-dimethyl-1,3-dioxolan-4-yl)methyl acetate) as a valuable fuel additive is described, for the first time. Monoacetin was synthesized by reacting glycerol with acetic acid, and then solketalacetin was produced from the reaction of monoacetin with acetone using Purolite PD 206 as a catalyst. The central co ...
DOI:
10.1021/acs.iecr.6b00929

84. Preparation and characterization of acetylated starch nanoparticles as drug carrier: Ciprofloxacin as a model

Author:
Seyed Heydar Mahmoudi Najafi; Maryam Baghaie; Alireza Ashori
Source:
International journal of biological macromolecules 2016 v.87 pp. 48-54
ISSN:
0141-8130
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; acetates; acetic anhydride; acetone; acetylation; ciprofloxacin; corn starch; drug carriers; encapsulation; glucose; mixing; models; nanoparticles; scanning electron microscopy; starch granules
Abstract:
... The objective of this study was to characterize in-vitro the potential of acetylated corn starch (ACS) particles as a matrix for the delivery of ciprofloxacin (CFx). ACS was successfully synthesized and optimized by the reaction of native corn starch using acetic anhydride and acetic acid with low and high degrees of substitution (DS). The nanoprecipitation method was applied for the formation of ...
DOI:
10.1016/j.ijbiomac.2016.02.030

85. Sorption of methanol, dimethyl carbonate, methyl acetate, and acetone vapors in CTA and PTMSP: General findings from the GAB Analysis

Author:
Ondřej Vopička; Kryštof Pilnáček; Petr Číhal; Karel Friess
Source:
Journal of polymer science 2016 v.54 no.5 pp. 561-569
ISSN:
0887-6266
Subject:
acetates; acetone; cellulose; diffusivity; methanol; models; polymers; sorbates; sorption; sorption isotherms; vapors
Abstract:
... Sorption of vapors of four organic compounds in two glassy polymers, cellulose triacetate (CTA) and poly[(trimethylsilyl)propyne] (PTMSP), has been reported and analyzed in terms of Guggenheim‐Anderson‐De Boer (GAB) model. These two structurally and physicochemically different glassy polymers both independently showed that one sorption site was formed by about three monomeric units. This finding h ...
DOI:
10.1002/polb.23945

86. Application of a compact trickle-bed bioreactor to the biodegradation of pollutants from the ventillation air in a copper-ore mine

Author:
Damian Kasperczyk; Krzysztof Urbaniec
Source:
Journal of cleaner production 2015 v.87 pp. 971-976
ISSN:
0959-6526
Subject:
acetates; acetone; air; benzene; biodegradation; biofiltration; bioreactors; coculture; dimethyl disulfide; dimethyl sulfide; hydrogen sulfide; laboratory experimentation; microorganisms; pollutants; pollution load; polyethylene; styrene; thiols; volatile organic compounds; working conditions; xylene
Abstract:
... Selected results are presented of an on-going project conducted by Ekoinwentyka Ltd. with the aim to design, test and apply a compact trickle-bed bioreactor – operated in a biofiltration system with circulating salt solution – to the biodegradation of VOCs, mercaptans and H2S contained in the ventillation air in a copper-ore mine at a depth of 1000 m underground. The experiments were performed usi ...
DOI:
10.1016/j.jclepro.2014.09.009

87. Coupling Adsorption and Biological Technologies for Multicomponent and Fluctuating Volatile Organic Compounds Emissions Abatement: Laboratory-Scale Evaluation and Full-Scale Implementation

Author:
Palau Jordi; Izquierdo Marta; Marzal Paula; Martínez-Soria Vicente
Source:
Industrial & Engineering Chemistry Research 2015 v.54 no.6 pp. 1713-1722
ISSN:
1520-5045
Subject:
acetates; acetone; activated carbon; adsorption; biofilters; biofiltration; desorption; emissions; equations; solvents; volatile organic compounds; xylene
Abstract:
... The capacity of activated carbon as a buffer pretreatment combined with biotrickling filtration for volatile organic compound (VOC) removal has been studied. The adsorption capacity of commercial activated carbons for m-xylene, acetone and n-butyl acetate (typical paint solvents) was evaluated, including the response to the interchanging of adsorbed compounds and to mixtures over fluctuating inlet ...
DOI:
10.1021/ie504193s

88. Determination of 5-nitroimidazole residues in milk by capillary electrochromatography with packed C18 silica beds

Author:
Maykel Hernández-Mesa; Francisco J. Lara; Carmen Cruces-Blanco; Ana M. García-Campaña
Source:
Talanta 2015 v.144 pp. 542-550
ISSN:
0039-9140
Subject:
acetates; acetone; chromium; drugs; electric power; electrical resistance; electrochromatography; liquid-liquid extraction; milk; packaging materials; particle size; silica; solid phase extraction; solvents; temperature
Abstract:
... This work presents a novel methodology for analysing 5-nitroimidazole residues in milk samples by capillary electrochromatography using lab-made packed columns, produced by carrying out a high pressure packing procedure using acetone as driving solvent and C18 silica uncapped particles (5µm particle size) as packing material. Column frits resulted from sintering the proper stationary phase by heat ...
DOI:
10.1016/j.talanta.2015.06.049

89. Effect of yeast strain on aroma compounds in Cabernet franc icewines

Author:
Kinga Synos; A.G. Reynolds; A.J. Bowen
Source:
Lebensmittel-Wissenschaft + Technologie 2015 v.64 no.1 pp. 227-235
ISSN:
0023-6438
Subject:
Saccharomyces bayanus; Saccharomyces cerevisiae; acetates; acetone; citronellol; correlation; furfural; gas chromatography-mass spectrometry; hexanoic acid; isoamyl alcohol; linalool; nerol; odor compounds; phenylethyl alcohol; wines; yeasts; Ontario
Abstract:
... Ontario Cabernet franc icewine musts were fermented using four yeasts [V1116 (Saccharomyces cerevisiae), EC1118 (Saccharomyces bayanus), VL1 (S. cerevisiae), spontaneous (SPON)]. The objective was to quantify aroma compounds by GC-MS, and to compare their concentrations between yeast treatments. These compounds had odor activity values >1 across all yeasts: isoamyl alcohol, 2-methyl-1-butanol, eth ...
DOI:
10.1016/j.lwt.2015.05.044

90. Evaluation of three types of protein extraction methods for tetraploid black locust (Robinia pseudoacacia L.) phloem tissue proteome analysis by two-dimensional electrophoresis

Author:
Sheng Zhang; Ling-Ling Zhang; Kai-Kai Zhou; Yu-Jing Liu; Zhong Zhao
Source:
Analytical methods 2015 v.7 no.3 pp. 1008-1017
ISSN:
1759-9679
Subject:
Robinia pseudoacacia; acetates; acetone; fruits; gels; leaves; matrix-assisted laser desorption-ionization mass spectrometry; methanol; phenol; phloem; protein content; proteome; proteomics; recalcitrant species; seeds; tetraploidy; two-dimensional gel electrophoresis; woody plants
Abstract:
... Sample preparation is a decisive step in a two-dimensional gel electrophoresis (2-DE) proteome approach and is essential for good experimental results. For recalcitrant plant tissues, choosing a suitable protein extraction method is very important for follow-up research. Many articles about protein extraction methods have been published that have mainly focused on plant leaves, fruits, and seeds, ...
DOI:
10.1039/c4ay02038c

91. Improved conversion efficiencies for n-fatty acid reduction to primary alcohols by the solventogenic acetogen “Clostridium ragsdalei”

Author:
Catherine E. Isom; Mark A. Nanny; Ralph S. Tanner
Source:
Journal of industrial microbiology & biotechnology 2015 v.42 no.1 pp. 29-38
ISSN:
1367-5435
Subject:
1-propanol; Clostridium; acetates; acetone; biotechnology; butyric acid; ethanol; gas exchange; headspace analysis; hexanoic acid; industrial microbiology; isopropyl alcohol; pentanols; propionic acid; synthesis gas
Abstract:
... “Clostridium ragsdalei” is an acetogen that ferments synthesis gas (syngas, predominantly H₂:CO₂:CO) to ethanol, acetate, and cell mass. Previous research showed that C. ragsdalei could also convert propionic acid to 1-propanol and butyric acid to 1-butanol at conversion efficiencies of 72.3 and 21.0 percent, respectively. Our research showed that C. ragsdalei can also reduce pentanoic and hexanoi ...
DOI:
10.1007/s10295-014-1543-z

92. Insights into the fatty acid ester norethisterone enanthate binding to human albumin: fluorescence, circular dichroism, and docking investigations

Author:
Qing Wang; Xiangling Ma; Jiawei He; Yuanzhi Li; Hui Li
Source:
RSC advances 2015 v.5 no.55 pp. 44696-44704
ISSN:
2046-2069
Subject:
acetates; acetone; binding sites; circular dichroism spectroscopy; drugs; fatty acid esters; fluorescence; human serum albumin; molecular models; progesterone; solvents; steroid hormones
Abstract:
... Norethisterone enanthate (NET-EN) is a fatty acid ester of norethisterone. The single crystallographic data of NET-EN [a = 6.09236(14) Å, b = 12.7347(3) Å, c = 30.1234(8) Å, α = β = γ = 90°, unit-cell volume V = 2337.11 ų, Z = 4, and space group P2₁2₁2₁] were obtained by using acetone as a solvent. The interaction of NET-EN with human serum albumin (HSA) was investigated using different optical t ...
DOI:
10.1039/c5ra06844d

93. Isolation and characterization of Maclura (Maclura pomifera) extracts obtained by supercritical fluid extraction

Author:
Snežana Filip; Zoltan Djarmati; Kiril Lisichkov; Janos Csanadi; Ratko M. Jankov
Source:
Industrial crops and products 2015 v.76 pp. 995-1000
ISSN:
0926-6690
Subject:
Maclura pomifera; acetates; acetone; alcohols; antioxidants; carbon dioxide; chemical composition; chemical reactions; isoflavonoids; lupeol; nuclear magnetic resonance spectroscopy; palmitic acid; spectral analysis; supercritical fluid extraction; triacylglycerols
Abstract:
... The chemical composition of the CO2 extract of Maclura fruit (Osage orange) was analyzed. The major constituents of the CO2 extracts were triterpene alcohol esters, along with the triglycerides of C16 and C18 fatty acids. Column chromatography of the CO2 extract yielded lupeol ester of hexadecanoic acid (2), lupeol ester of 3-hydroxyhexadecanoic acid (β-hydroxy palmitic acid) (3) trace of lupeol ( ...
DOI:
10.1016/j.indcrop.2015.07.066

94. Key volatile aroma compounds of three black velvet tamarind (Dialium) fruit species

Author:
Ola Lasekan; Ng Siew See
Source:
Food chemistry 2015 v.168 pp. 561-565
ISSN:
0308-8146
Subject:
Dialium; acetates; acetone; fruits; limonene; linalool; odor compounds; odors; sensory evaluation; tamarinds
Abstract:
... Nineteen odour-active compounds were quantified in three black velvet tamarind fruit species. Calculation of the odour activity values (OAVs) of the odorants showed that differences in odour profiles of the tamarinds were mainly caused by linalool, limonene, 4-hydroxy-2,5-dimethyl-3(2H)-furanone, nonanal, and (Z)-3-hexenal. On the basis of their high OAVs, cis-linalool oxide (furanoid), geranyl ac ...
DOI:
10.1016/j.foodchem.2014.07.112

95. Metabolic analysis of butanol production from acetate in Clostridium saccharoperbutylacetonicum N1-4 using ¹³C tracer experiments

Author:
Ming Gao; Yukihiro Tashiro; Tsuyoshi Yoshida; Jin Zheng; Qunhui Wang; Kenji Sakai; Kenji Sonomoto
Source:
RSC advances 2015 v.5 no.11 pp. 8486-8495
ISSN:
2046-2069
Subject:
Clostridium saccharoperbutylacetonicum; acetates; acetone; butanol; carbon; culture media; developmental stages; fermentation; gas chromatography-mass spectrometry; glucose; glycolysis; solvents; stable isotopes
Abstract:
... During acetone–butanol–ethanol (ABE) fermentation by clostridia, acetate is reutilised for butanol production. In this study, we investigated the characteristics of ABE production from acetate and analysed the metabolism of exogenously added acetate by Clostridium saccharoperbutylacetonicum N1-4. Supplementation of 4 g L⁻¹ exogenous acetate, to media containing glucose, increased not only concentr ...
DOI:
10.1039/c4ra09571e

96. Metabolic engineering of Clostridium tyrobutyricum for n-butanol production: effects of CoA transferase

Author:
Le Yu; Jingbo Zhao; Mengmeng Xu; Jie Dong; Saju Varghese; Mingrui Yu; I-Ching Tang; Shang-Tian Yang
Source:
Applied microbiology and biotechnology 2015 v.99 no.11 pp. 4917-4930
ISSN:
0175-7598
Subject:
Clostridium acetobutylicum; Clostridium beijerinckii; Clostridium tyrobutyricum; acetates; acetone; aldehyde dehydrogenase; biosynthesis; butanol; butyrates; decarboxylation; fermentation; gene overexpression; glucose; metabolic engineering; mutants; operon; pH; plasmids
Abstract:
... The overexpression of CoA transferase (ctfAB), which catalyzes the reaction: acetate/butyrate + acetoacetyl-CoA → acetyl/butyryl-CoA + acetoacetate, was studied for its effects on acid reassimilation and butanol biosynthesis in Clostridium tyrobutyricum (Δack, adhE2). The plasmid pMTL007 was used to co-express adhE2 and ctfAB from Clostridium acetobutylicum ATCC 824. In addition, the sol operon co ...
DOI:
10.1007/s00253-015-6566-5

97. Size-exclusive and coordination-induced selective dye adsorption in a nanotubular metal–organic framework

Author:
Yi Han; Shunan Sheng; Fan Yang; Yabo Xie; Minjian Zhao; Jian-Rong Li
Source:
Journal of materials chemistry A 2015 v.3 no.24 pp. 12804-12809
ISSN:
2050-7496
Subject:
acetates; acetone; acriflavine; adsorption; cobalt; coordination polymers; methyl orange; methylene blue; porosity; solvents
Abstract:
... A new metal–organic framework, {[(CH₃)₂NH₂][Co₂NaL₂(CH₃COO)₂]·xS}ₙ (BUT-51, H₂L = 5-(pyridine-4-yl)isophthalic acid) with two types of nanotubular channels, was synthesized and used in dye adsorption. It was found that cationic dyes, including Methylene Blue (MB), Acridine Red (AR) and Acriflavine Hydrochloride (AH), can be rapidly adsorbed by BUT-51, but larger Methylene Violet (MV) and anionic M ...
DOI:
10.1039/c5ta00963d

98. The effect of yeast strain on odor active compounds in Riesling and Vidal blanc icewines

Author:
Molly Crandles; Andrew G. Reynolds; Ramsay Khairallah; Amy Bowen
Source:
Lebensmittel-Wissenschaft + Technologie 2015 v.64 no.1 pp. 243-258
ISSN:
0023-6438
Subject:
Saccharomyces bayanus; Saccharomyces cerevisiae; acetates; acetone; active ingredients; beta-ionone; cultivars; nerol; odor compounds; odors; phenylacetic acid; phenylethyl alcohol; wines; yeasts; Ontario
Abstract:
... Aroma compounds were quantified by stir bar sorptive extraction-GC/MS in Ontario Riesling and Vidal blanc (syn. Vidal) icewines fermented by different yeasts [V1116, VL1 (Saccharomyces cerevisiae), EC1118 (Saccharomyces bayanus), spontaneous (SPON)]. Yeasts led to differences in compound concentrations, and yeast-derived trends were cultivar and vintage-dependent. In Riesling, V1116 produced highe ...
DOI:
10.1016/j.lwt.2015.05.049

99. The influence of various potassium compound additions on the plasticity of a high-swelling South African coal under pyrolyzing conditions

Author:
C.A. Strydom; A.C. Collins; J.R. Bunt
Source:
Journal of analytical and applied pyrolysis 2015 v.112 pp. 221-229
ISSN:
0165-2370
Subject:
acetates; acetone; cations; coal; oxygen; plasticity; potassium; potassium carbonate; potassium chloride; potassium hydroxide; pyrolysis; temperature; thermogravimetry; vapors
Abstract:
... The influence of the anion attached to a potassium cation on the decrease of plastic properties of a high swelling vitrinite-rich medium rank B South African coal was investigated by adding potassium hydroxide (KOH), potassium carbonate (K2CO3), potassium acetate (KCH3CO2) and potassium chloride (KCl) to a partially demineralized coal sample. 5 and 10 weight percentages (determined as the amount o ...
DOI:
10.1016/j.jaap.2015.01.023

100. Thermodynamic analysis and reaction routes of steam reforming of bio-oil aqueous fraction

Author:
K.A. Resende; C.N. Ávila-Neto; R.C. Rabelo-Neto; F.B. Noronha; C.E. Hori
Source:
Renewable energy 2015 v.80 pp. 166-176
ISSN:
0960-1481
Subject:
acetates; acetic acid; acetone; biofuels; desorption; hydrogen; models; steam; temperature; thermodynamics
Abstract:
... Steam reforming of the bio-oil aqueous fraction is a potential process to produce hydrogen. Therefore, to perform a thermodynamic study of this process can be interesting to determine the most favorable operating conditions. The calculations were made using a model compound and an aqueous fraction of a specific bio-oil. The data were obtained at different temperatures and for different steam(S)/fu ...
DOI:
10.1016/j.renene.2015.01.057