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You searched for: Subject acetates Remove constraint Subject: acetates Subject term acetates Remove constraint Subject term: acetates Subject term acetic acid Remove constraint Subject term: acetic acid
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1. A Fenton-like System (Cu(II)/H₂O₂) for the Preparation of Cellulose Nanocrystals with a Slightly Modified Surface

Author:
Mikhail A. Torlopov; Ilia S. Martakov; Vasily I. Mikhaylov; Yevgeny A. Golubev; Petr A. Sitnikov; Elena V. Udoratina
Source:
Industrial & engineering chemistry process design and development 2019 v.58 no.44 pp. 20282-20290
ISSN:
1520-5045
Subject:
X-ray diffraction; acetates; acetic acid; atomic force microscopy; cellulose; chemical analysis; coagulation; copper; copper nanoparticles; cryo-electron microscopy; crystal structure; distillates; hydrogen peroxide; light scattering; moieties; nanocrystals; photometry; potassium chloride; process design; spectroscopy; thermal stability; thermogravimetry
Abstract:
... A preparation process of cellulose nanocrystals using a Fenton-like system was presented. Rod-shaped cellulose nanocrystals were isolated after treatment in the H₂O₂/acetic acid/2–6 mol % copper acetate system. The morphology and sizes of rod-shaped particles were determined by AFM (atomic force microscopy) and cryo-EM (cryo-electron microscopy). X-ray diffraction proves that the prepared particle ...
DOI:
10.1021/acs.iecr.9b03226

2. A Gene Encoding Phosphatidylethanolamine N-Methyltransferase from Acetobacter aceti and Some Properties of its Disruptant

Author:
Takashi HANADA; Yasuhiro KASHIMA; Akihiko KOSUGI; Yukimichi KOIZUMI; Fujiharu YANAGIDA; Shigezo UDAKA
Source:
Bioscience, biotechnology, and biochemistry 2001 v.65 no.12 pp. 2741-2748
ISSN:
1347-6947
Subject:
Acetobacter (subgen. Acetobacter) aceti; DNA libraries; Escherichia coli; Rhodobacter sphaeroides; Southern blotting; acetates; acetic acid; acid tolerance; alleles; biochemical pathways; biosynthesis; biotechnology; culture media; ethanol; eukaryotic cells; methylation; molecular weight; mutants; phosphatidylcholines; phosphatidylethanolamine N-methyltransferase; phosphatidylethanolamines; plasmids; polypeptides
Abstract:
... Phosphatidylcholine (PC) is a major component of membranes not only in eukaryotes, but also in several bacteria, including Acetobacter. To identify the PC biosynthetic pathway and its role in Acetobacter sp., we have studied Acetobacter aceti IFO3283, which is characterized by high ethanol oxidizing ability and high resistance to acetic acid. The pmt gene of A. aceti, encoding phosphatidylethanola ...
DOI:
10.1271/bbb.65.2741

3. A Technological Solution to Modulate the Aroma Profile during Beer Fermentation

Author:
Lorenzo Guerrini; Giulia Angeloni; Piernicola Masella; Luca Calamai; Alessandro Parenti
Source:
Food and bioprocess technology 2018 v.11 no.6 pp. 1259-1266
ISSN:
1935-5130
Subject:
acetates; acetic acid; active ingredients; beers; ethanol; fermentation; fermenters; flavor; gas chromatography-mass spectrometry; headspace analysis; odors; solid phase microextraction; wines
Abstract:
... During the production of fermented alcoholic beverages, such as wine or beer, the loss of aroma active compounds (AACs) has a significant impact on the overall product aroma. This paper presents the results of an experimental technique in which a condenser was placed on the top of the fermenter in order to reduce such losses. AAC concentrations in beers produced in this way were compared with a co ...
DOI:
10.1007/s11947-018-2099-0

4. A Thin‐layer Chromatography Method for the Identification of Three Different Olibanum Resins (Boswellia serrata, Boswellia papyrifera and Boswellia carterii, respectively, Boswellia sacra)

Author:
Michael Paul; Gerit Brüning; Jochen Bergmann; Johann Jauch
Source:
Phytochemical analysis 2012 v.23 no.2 pp. 184-189
ISSN:
0958-0344
Subject:
Boswellia serrata; acetates; acetic acid; biomarkers; biosynthesis; chromatography; dyes; ethers; mass spectrometry; methanol; nuclear magnetic resonance spectroscopy; oxides; pentane; resins; type collections
Abstract:
... INTRODUCTION: Resins of the genus Boswellia are currently an interesting topic for pharmaceutical research since several pharmacological activities (e.g. anti‐inflammatory, anti‐microbial, anti‐tumour) are reported for extracts and compounds isolated from them. Unambiguous identification of these resins, by simple and convenient analytical methods, has so far not clearly been verified. OBJECTIVE: ...
DOI:
10.1002/pca.1341
PubMed:
21858880

5. A combination of low‐temperature reactive and extractive distillation for methoxy‐2‐propyl acetate synthesis and separation process: simulations and experiments

Author:
Baohe Wang; Xinlei Cai; Liang Lu; Jing Ma
Source:
Journal of chemical technology and biotechnology 2019 v.94 no.10 pp. 3292-3304
ISSN:
0268-2575
Subject:
1-propanol; acetates; acetic acid; batch systems; catalysts; catalytic activity; cation exchange resins; chemical equilibrium; cyclohexanes; distillation; esterification; temperature; thermal stability; thermodynamic models
Abstract:
... BACKGROUND: Esterification of methoxy propanol (MP) and acetic acid (HAC) to methoxy‐2‐propyl acetate (MPA) is a typical reversible reaction. The yield of MPA is low owing to the limitation of chemical equilibrium. In the present study, with the goal of increasing the reaction conversion and preventing the NKC‐9 cation exchange resin catalyst from deactivation at high temperature, a process combin ...
DOI:
10.1002/jctb.6140

6. A comparison of different synthesis routes for starch acetates and the resulting mechanical properties

Author:
Volkert, Bert; Lehmann, Andre; Greco, Tonino; Nejad, Mehdi Hassan
Source:
Carbohydrate polymers 2010 v.79 no.3 pp. 571-577
ISSN:
0144-8617
Subject:
acetates; synthesis; thermoplastics; mechanical properties; extrusion; crystal structure; potato starch; corn starch; esterification; acetylation; acetic acid; sodium hydroxide; potassium carbonate
Abstract:
... Starch acetate based on a sustainable native polymer can be used as a thermoplastic substance to produce e.g. commodity material. This work investigates the influence of the synthesis routes and starch species on the mechanical properties of starch acetate with 20 w% triacetin as a plasticizer after thermoplastic processing. For better comparison, acetic acid anhydride was used both as a reactant ...
DOI:
10.1016/j.carbpol.2009.09.005

7. A facile and rapid room-temperature route to hierarchical bismuth oxyhalide solid solutions with composition-dependent photocatalytic activity

Author:
Juan Zhang; Qiaofeng Han; Junwu Zhu; Xin Wang
Source:
Journal of colloid and interface science 2016 v.477 pp. 25-33
ISSN:
0021-9797
Subject:
acetates; acetic acid; ambient temperature; bismuth; irradiation; photocatalysis; photolysis; potassium bromide; potassium chloride; rhodamines; solid solutions; titanium dioxide
Abstract:
... The unique nanosheet-based flower-like BiOCl1−xBrx (x=0–1) hierarchical solid solutions have been prepared by the reaction of Bi2O3 and KCl/KBr in mixed solution of glacial acetic acid (HAc) and H2O in dozens of minutes under ambient conditions. During the preparation process, the intermediate bismuth oxide acetate (CH3COOBiO) plays a key role in the formation of BiOCl1−xBrx solid solutions in suc ...
DOI:
10.1016/j.jcis.2016.05.027

8. A highly sensitive and rapid LC-MS/MS method for quantification of bexarotene in mouse plasma and brain tissue: Application to mice pharmacokinetic study

Author:
Huimei Fu; Lijuan Chu; He Jiao; Longyi Lin; Youping Liu; Guoliang Chen; Libo Zou; Xin Wang; Xin Di
Source:
Journal of chromatography 2022 v.1189 pp. 123025
ISSN:
1570-0232
Subject:
Alzheimer disease; acetates; acetic acid; antineoplastic agents; brain; electrospray ionization mass spectrometry; half life; liquid chromatography; methanol; mice; pH; pharmacokinetics; rapid methods; skin neoplasms; tandem mass spectrometry
Abstract:
... Emerging evidence has suggested that bexarotene, a nearly 20-year-old skin cancer drug, may be a potential drug candidate to treat Alzheimer's disease (AD) and other neurodegenerative disorders. As described in this study, a highly sensitive and rapid method, using liquid chromatography–tandem mass spectrometry (LC–MS/MS) to determine bexarotene in mouse plasma and brain tissue, was established an ...
DOI:
10.1016/j.jchromb.2021.123025

9. A laboratory-scale model cocoa fermentation using dried, unfermented beans and artificial pulp can simulate the microbial and chemical changes of on-farm cocoa fermentation

Author:
Andrew H. Lee; Andrew P. Neilson; Sean F. O’Keefe; Jactone Arogo Ogejo; Haibo Huang; Monica Ponder; Hyun Sik S. Chu; Qing Jin; Guillaume Pilot; Amanda C. Stewart
Source:
European food research & technology 2019 v.245 no.2 pp. 511-519
ISSN:
1438-2377
Subject:
Acetobacter pasteurianus; Acetobacter tropicalis; Lactobacillus fermentum; Lactobacillus plantarum; Saccharomyces cerevisiae; acetates; acetic acid; acetoin; aeration; astringency; bitterness; chocolate; cocoa beans; fermentation; food research; microorganisms; models; pH; phenylethyl alcohol; polyphenols; pulp; sugars; temperature; volatile compounds
Abstract:
... Cocoa fermentation is an essential step for chocolate production whereby flavor potential is generated and bitterness and astringency are moderated. To facilitate fermentation research in laboratories geographically distant from cocoa-growing regions, and to simplify and control the fermentation system, a laboratory fermentation model system was developed. The model system consisted of dried unfer ...
DOI:
10.1007/s00217-018-3171-8

10. A new kinetic model for simultaneous interesterification and esterification reactions from methyl acetate and highly acidic oil

Author:
L.N. Brondani; J.S. Ribeiro; F. Castilhos
Source:
Renewable energy 2020 v.156 pp. 579-590
ISSN:
0960-1481
Subject:
acetates; acetic acid; algorithms; aluminum oxide; catalysts; chemical equilibrium; endothermy; esterification; fatty acid methyl esters; glycerol; kinetics; oils; renewable energy sources
Abstract:
... This work presents the development of a kinetic model for simultaneous reactions of esterification and interesterification from macaw oil and methyl acetate using γ-alumina as the heterogeneous catalyst. Experimental data varied between 225 °C and 300 °C, catalyst concentration of 2 wt%, 5 wt%, and 10 wt% and molar ratio (methyl acetate: Oil) of 10:1, 20:1 and 40:1. Arrhenius kinetic parameters we ...
DOI:
10.1016/j.renene.2020.04.063

11. A new process for producing calcium acetate from vegetable wastes for use as an environmentally friendly deicer

Author:
Jin, Fangming; Zhang, Guangyi; Jin, Yujia; Watanabe, Yosiyuki; Kishita, Atsushi; Enomoto, Heiji
Source:
Bioresource technology 2010 v.101 no.19 pp. 7299-7306
ISSN:
0960-8524
Subject:
acetates; acetic acid; magnesium; vegetables; wastes
Abstract:
... A new process for producing calcium acetate, a non-corrosive deicer, is proposed. The process consists of a two-step continuous-flow hydrothermal conversion of vegetable wastes into acetic acid and the production of calcium acetate, followed by the separation and condensation of the product. The experiments for acetic acid production showed that there were almost no significant differences in acet ...
DOI:
10.1016/j.biortech.2010.04.081
PubMed:
20483594

12. A novel low pH fermentation process for the production of acetate and propylene glycol from carbohydrate wastes

Author:
Sathyanarayanan S. Veeravalli; Alexander P. Mathews
Source:
Enzyme and microbial technology 2019 v.120 pp. 8-15
ISSN:
0141-0229
Subject:
Lactobacillus buchneri; Lactobacillus plantarum; acetates; acetic acid; aircraft; anaerobic conditions; coculture; deicing agents; fermentation; lactose; pH; propylene glycol; resins; value-added products; wastes; whey powder
Abstract:
... A novel low pH fermentation process was studied for the conversion of lactose using Lactobacillus plantarum and Lactobacillus buchneri under anoxic conditions in single co-culture, and two-stage sequential fermentations. This is aimed at producing acetate and propylene glycol (PG) as environmentally benign substitutes for currently used road and aircraft deicing chemicals. The results indicate tha ...
DOI:
10.1016/j.enzmictec.2018.09.006

13. A novel method to analyze the degree of acetylation in biopolymers

Author:
T. Zweckmair; M. Becker; K. Ahn; H. Hettegger; P. Kosma; T. Rosenau; A. Potthast
Source:
Journal of chromatography 2014 v.1372 pp. 212-220
ISSN:
0021-9673
Subject:
acetates; acetic acid; acetylation; biopolymers; cellulose; detection limit; gas chromatography-mass spectrometry; hemicellulose; liquids; moieties; solid phase microextraction
Abstract:
... A novel approach to measure the degree of acetylation in biopolymers applying a combination of Zemplén-deacetylation by sodium methanolate and GC–MS methodology is introduced. The development focuses on very low limits of detection to cover also samples with extremely low degrees of acetylation which hitherto eluded accurate determination. Free acetic acid or inorganic acetates, often present in b ...
DOI:
10.1016/j.chroma.2014.10.082

14. A novel solid acid catalyst synthesized from ZnAl₂O₄ spinel and its application in the esterification of acetic acid and n-butyl alcohol

Author:
An-Qi Wang; Xiu-Ling Wu; Jun-Xia Wang; Hui Pan; Xiao-Yun Tian; Yu-Lin Xing
Source:
RSC advances 2015 v.5 no.25 pp. 19652-19658
ISSN:
2046-2069
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; X-ray photoelectron spectroscopy; acetates; acetic acid; acidity; ammonia; butanol; catalysts; catalytic activity; crystal structure; desorption; esterification; nitrogen; porous media; scanning electron microscopy; sol-gel processing; temperature
Abstract:
... A new spinel-style S₂O₈²⁻/ZnAl₂O₄ solid acid catalyst was prepared by sol–gel method. The catalytic performance was evaluated by the esterification of n-butyl acetate. The structure, morphology and acidity of the samples were characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), Field emission scanning electron microscopy (FE-SEM), N₂ physisorption, X-ray photo ...
DOI:
10.1039/c4ra15941a

15. A rapid, low-cost flocculation technology for enhanced microalgae harvesting

Author:
Arun Kumar Mehta; Saikat Chakraborty
Source:
Bioresource technology reports 2021 v.16 pp. 100856
ISSN:
2589-014X
Subject:
acetates; acetic acid; alum; ammonium chloride; biomass; carbon dioxide; commercialization; flocculation; gravity; hydrochloric acid; hydrogen; hydrolysis; microalgae; pH
Abstract:
... A rapid, low-cost, scalable flocculation technology, using either potash alum (for culture pH < 8.5), or potash alum with hydrochloric acid (for culture pH > 8.5), is employed to harvest algal biomass in less than thirty minutes. The gaseous CO₂ (0.04–5%) and acetic acid glacial added during mixotrophic cultivation produce hydrogen and acetate ions that react with hydrolysed potash alum to form ch ...
DOI:
10.1016/j.biteb.2021.100856

16. A simple and economical spectrofluorimetric alternative for Al routine analysis in seafood

Author:
José A. López-López; Carlos Borrego-Corchado; Manuel P. Mánuel; Estrella Espada-Bellido
Source:
Talanta 2018 v.182 pp. 210-217
ISSN:
0039-9140
Subject:
Bivalvia; acetates; acetic acid; aluminum; cans; color; cost effectiveness; ethanol; experimental design; fluorescence; food quality; hydroxybenzaldehyde; pH; quality control; seafoods
Abstract:
... A simple and economical spectrofluorimetric alternative for aluminium determination in bivalve mollusks based on the fluorescent blue-green colour complex between Al(III) and salicylaldehyde picolinoylhydrazone (SAPH) has been studied. The factors that are most likely to affect were optimized with a Box-Behnken design. Optimum conditions were: pH 6.6, 0.9 mol L⁻¹ acetic acid/acetate buffer, 3.0 mm ...
DOI:
10.1016/j.talanta.2018.01.092

17. A simple and efficient method for the allylation of heteroarenes catalyzed by PdCl₂

Author:
Feng-Quan Yuan; Feng-Yi Sun; Fu-She Han
Source:
Tetrahedron 2012 v.68 no.34 pp. 6837-6842
ISSN:
0040-4020
Subject:
acetates; acetic acid; additives; catalysts; chemical reactions; chemical structure; mixing
Abstract:
... The PdCl₂-catalyzed allylation of heteroarenes is presented. Various heteroarenes including O-, N-, and S-based ones were allylated efficiently with a rich range of allylic acetates in the presence of only 2mol % of PdCl₂, without the need of bases/acids, additives, and external supporting ligands. In addition, the reactions were carried out under mild and simple conditions just by stirring the tw ...
DOI:
10.1016/j.tet.2012.06.038

18. A simple and green method for determination of ethanol in liquors by the conductivity measurement of the uncatalyzed esterification reaction

Author:
Titikan Somboon; Ratchanee Phatchana; Wimonrat Tongpoothorn; Sira Sansuk
Source:
Lebensmittel-Wissenschaft + Technologie 2022 v.154 pp. 112593
ISSN:
0023-6438
Subject:
acetates; acetic acid; dissociation; electrical conductivity; esterification; ethanol; hydrogen
Abstract:
... A simple and green procedure for quantifying the ethanol concentration based on the conductometric method and the uncatalyzed esterification reaction was demonstrated. The reaction progress between ethanol and acetic acid was followed by detecting the electrical conductivity, corresponding to the amount of hydrogen ion and acetate anion from acetic acid dissociation. By fixing the concentration of ...
DOI:
10.1016/j.lwt.2021.112593

19. A strategy for food waste-to-biofuels: Co-production of gasoline alternatives from volatile fatty acids

Author:
Juyeon Kim; Hoyoung park; Jeehoon Han; Jechan Lee
Source:
Journal of cleaner production 2022 v.348 pp. 131408
ISSN:
0959-6526
Subject:
acetates; acetic acid; anaerobic digestion; butanol; butyric acid; economics; energy efficiency; ethanol; gasoline; heat; heat exchangers; liquids; organic wastes; simulation models
Abstract:
... Volatile fatty acids (VFA), byproducts of anaerobic digestion of organic waste, have emerged as a platform molecule for the production of liquid fuels and chemicals. This study reports a co-production process that allows the conversion of VFAs into promising gasoline alternatives: acetic acid to ethanol (EtOH) via methyl acetate and butyric acid to butanol (BuOH) via methyl butyrate. The effect of ...
DOI:
10.1016/j.jclepro.2022.131408

20. A voltammetric electronic tongue as tool for water quality monitoring in wastewater treatment plants

Author:
Inmaculada Campos; Miguel Alcañiz; Daniel Aguado; Ramón Barat; José Ferrer; Luis Gil; Mouna Marrakchi; Ramón Martínez-Mañez; Juan Soto; José-Luis Vivancos
Source:
Water research 2012 v.46 no.8 pp. 2605-2614
ISSN:
0043-1354
Subject:
acetates; acetic acid; alkalinity; ammonia; biochemical oxygen demand; bioreactors; chemical oxygen demand; cobalt; copper; electrochemistry; electrodes; electronic tongue; gold; ions; least squares; monitoring; nickel; orthophosphates; prediction; stainless steel; wastewater; wastewater treatment; water quality
Abstract:
... The use of a voltammetric electronic tongue as tool for the prediction of concentration levels of certain water quality parameters from influent and effluent wastewater from a Submerged Anaerobic Membrane Bioreactor pilot plant applied to domestic wastewater treatment is proposed here. The electronic tongue consists of a set of noble (Au, Pt, Rh, Ir, and Ag) and non-noble (Ni, Co and Cu) electrode ...
DOI:
10.1016/j.watres.2012.02.029
PubMed:
22424964