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1. Bioactive compounds extraction from different lemongrass species: Strategies and deep eutectic solvents evaluation

Author:
Carlos E. B. Toazza; Fernando C. Leal; Caroline Marques; Grazielle Oliveira; Fabiane O. Farias; André L. D. Belan; Natalicio F. Leite; Marcos R. Mafra; Luciana Igarashi‐Mafra; Maria Lucia Masson
Source:
Journal of food process engineering 2022 v.45 no.5 pp. e14033
ISSN:
0145-8876
Subject:
Cymbopogon citratus; Cymbopogon flexuosus; Elionurus; acetic acid; acetone; antioxidant activity; antioxidants; citral; cosmetics; employment; ethanol; food chain; human health; magnetism; methanol; solvents; temperature; ultrasonics; wastewater
Abstract:
... Lemongrasses are known and used worldwide due to several benefits conferred to them regarding the high content of essential oils and other phenolic compounds, which are essential and nonessential compounds that occur in nature, are part of the food chain and present several benefits on human health. The obtaining of phenolic compounds from natural matrices requires the development of effective pro ...
DOI:
10.1111/jfpe.14033

2. Green products from herbal medicine wastes by subcritical water treatment

Author:
Maryam Jouyandeh; Omid Tavakoli; Reza Sarkhanpour; S. Mohammad Sajadi; Payam Zarrintaj; Navid Rabiee; Omid Akhavan; Eder C. Lima; Mohammad Reza Saeb
Source:
Journal of hazardous materials 2022 v.424 pp. 127294
ISSN:
0304-3894
Subject:
COVID-19 infection; acetic acid; acetone; aspartic acid; cellobiose; formic acid; fructose; glucose; glycolic acid; herbal medicines; hot water treatment; hydrolysis; lactic acid; medicine; subcritical water treatment; temperature; threonine; total organic carbon
Abstract:
... Herbal medicine wastes (HMWs) are byproducts of medicine factories, which are mainly landfilled for their environmental problems. Only bearing in mind the contamination and concerns caused by the COVID-19 pandemic and environmental emissions, the worth of herbal medicine wastes management and conversion to green products can be understood. In this work, subcritical water treatment was carried out ...
DOI:
10.1016/j.jhazmat.2021.127294

3. Hydrogen production from steam reforming of acetic acid over Pt–Ni bimetallic catalysts supported on ZrO2

Author:
Isabella C.A. Souza; Robinson L. Manfro; Mariana M.V.M. Souza
Source:
Biomass and bioenergy 2022 v.156 pp. 106317
ISSN:
0961-9534
Subject:
acetic acid; acetone; acidity; biofuels; biomass; catalysts; catalytic activity; crystallites; hydrogen production; steam; temperature
Abstract:
... Acetic acid, a model compound of bio-oil, was chosen to investigate the H₂ production from steam reforming reaction using Pt and Ni catalysts supported on ZrO₂. Ni crystallite sizes decreased with addition of Pt (from 23 to 15 nm), increasing the metallic dispersion (from 4.4 to 6.5%). A spillover effect was identified in bimetallic catalysts and caused a significant decrease of Ni reduction tempe ...
DOI:
10.1016/j.biombioe.2021.106317

4. Recyclable regeneration of NiO/NaF catalyst: Hydrogen evolution via steam reforming of oxygen-containing volatile organic compounds

Author:
Yan Ding; Yi Cai; Peiwen Li; Sasa Gu; Shixing Song; Jie Guan; Yuesong Shen; Yuchen Han; Weiyi He
Source:
Energy conversion and management 2022 v.258 pp. 115456
ISSN:
0196-8904
Subject:
acetic acid; acetone; activation energy; administrative management; adsorption; carbon; catalysts; catalytic activity; density functional theory; electric field; energy conversion; ethanol; ethyl acetate; formaldehyde; formic acid; hydrogen production; methanol; nickel oxide; steam; surface area; temperature; volatile organic compounds
Abstract:
... Regenerable NiO/NaF catalysts break the limitation that catalyst with low specific surface area is difficult to obtain high catalytic activity. In this paper, we investigated the feasibility and universal applicability of hydrogen evolution from different oxygen-containing volatile organic compounds (OVOCs) such as methanol, formaldehyde, formic acid, ethanol, acetic acid, acetone and ethyl acetat ...
DOI:
10.1016/j.enconman.2022.115456

5. The use of yeast‐rich kefir grain as a starter culture in bread making

Author:
Fatma Ataç; Bilge Ertekin Filiz; Zeynep B. Guzel‐Seydim
Source:
Journal of food processing and preservation 2022 v.46 no.5 pp. e15242
ISSN:
0145-8892
Subject:
Kluyveromyces marxianus; Saccharomyces cerevisiae; acetaldehyde; acetic acid; acetone; bakers yeast; breadmaking quality; ethanol; kefir; lactic acid; sourdough; sourdough bread; starter cultures
Abstract:
... To investigate the use of yeasts and lactic acid bacteria from natural kefir grain in bread making and its effects on dough and bread quality. The kefir grains were treated with different food‐based solutions to enrich the yeast content. Three kefir samples were produced with the treated grains (KAL and SIT) and the control (KEF) kefir grains (untreated). The yeasts isolated from the kefir samples ...
DOI:
10.1111/jfpp.15242

6. An antibody-free LC-MS/MS method for the quantification of intact insulin-like growth factors 1 and 2 in human plasma [Erratum: August 2021, Vol.413(21), p.5529]

Author:
Mark S. Pratt; Martijn van Faassen; Noah Remmelts; Rainer Bischoff; Ido P. Kema
Source:
Analytical and bioanalytical chemistry 2021 v.413 no.8 pp. 2035-2044
ISSN:
1618-2642
Subject:
acetic acid; acetone; acetonitrile; analytical chemistry; biomarkers; chemical species; dissociation; electrospray ionization mass spectrometry; ethanol; humans; immunoassays; quantitative analysis; reference standards; spectrometers
Abstract:
... Insulin-like growth factors 1 and 2 (IGF-1 and IGF-2) are important biomarkers in research and diagnosis of growth disorders. Quantitative analysis is performed using various ligand-binding assays or enzymatic digestion LC-MS/MS methods, whose widespread adoption is hampered by time-consuming sample preparation procedures. We present a simple and fast antibody-free LC-MS/MS method for the quantifi ...
DOI:
10.1007/s00216-021-03185-y

7. An effect blending of acetone and acetic acid as bio-oil model compound for steam reforming reaction over Ce doped LaNi0.8Fe0.2O3-based perovskite

Author:
Chenlong Liu; Plaifa Hongmanorom; Jangam Ashok; Dong Chen; Qiao Wu; Wenju Wang; Zhigang Wang
Source:
Biomass and bioenergy 2021 v.151 pp. 106177
ISSN:
0961-9534
Subject:
Fourier transform infrared spectroscopy; X-radiation; X-ray diffraction; acetic acid; acetone; adsorption; biofuels; biomass; carbon; catalysts; catalytic activity; desorption; hydrogen production; models; steam; synthesis gas; temperature
Abstract:
... Conversion of biomass tar to useful hydrogen-rich syngas will solve environmental issues related to tar emission as well as increase the overall efficiency of biomass conversion. There are various catalysts to achieve that. In this study, La₁₋ₓCeₓNi₀.₈Fe₀.₂O₃ (0 ≤ x ≤ 1) is selected, and acetic acid has been used as a biomass tar model. Fixed-bed reactor was used for this investigation, while the ...
DOI:
10.1016/j.biombioe.2021.106177

8. Antioxidant capacity of blackcurrant (Ribes nigrum L.) leaves and buds

Author:
Cs. Orbán; É. Kis; Cs. Albert; É. Molnos
Source:
Acta Universitatis Sapientiae, Alimentaria 2021 v.14 no.1 pp. 117-129
ISSN:
2066-7744
Subject:
Ribes nigrum; acetic acid; acetone; antioxidant activity; black currants; cultivars; ethanol; free radicals; harvest date; methanol
Abstract:
... The antioxidant capacity is the combined free radical scavenging effect of all antioxidant compounds found in the studied system. There is a growing need for accurate, numerical determination of this capacity (for easier comparison), so there are many analytical procedures, methods, and measurement systems available to researchers. Neither one is able to model the totality of real, naturally occur ...
DOI:
10.2478/ausal-2021-0007

9. Biochemical Properties Affecting the Nutritional Quality, Safety, and Aroma of Dry-Cured Products Manufactured from Meat of Rare Native Pig Breeds

Author:
Ewelina Węsierska; Joanna Sobolewska-Zielińska; Małgorzata Pasternak; Katarzyna Niemczyńska-Wróbel; Robert Gąsior; Krzysztof Wojtycza; Henryk Pustkowiak; Iwona Duda; Władysław Migdał
Source:
Foods 2021 v.10 no.7 pp. -
ISSN:
2304-8158
Subject:
acetic acid; acetone; arginine; cadaverine; cured meats; decarboxylation; ethanol; histamine; histidine; lactic acid; lipid peroxidation; lysine; meat; microbial activity; nutritive value; odors; oxidation; pH; phenylacetaldehyde; putrescine; swine; tryptamine; tyramine
Abstract:
... The aim of study was to compare the biochemical properties affecting the nutritional quality, safety, and aroma of dry-cured products manufactured from valuable meat of rare native pig breeds: Pulawska (Pul) and Zlotnicka Spotted (ZS). The count of lactic acid bacteria (4.4 log cfu/g) and the release of palmitic (23.1% and 25.9%), oleic (44.1% and 42.2%), and linoleic acids (8.3% and 7.8%), as wel ...
DOI:
10.3390/foods10071597

10. Characterization of a lignin-based gel responsive to aqueous binary solvents and pH

Author:
Shogo Taira; Yuriko Usukura; Mitsukuni Nishida; Kengo Shigetomi; Yasumitsu Uraki
Source:
Holzforschung 2021 v.75 no.8 pp. 765-772
ISSN:
1437-434X
Subject:
absorbents; acetic acid; acetone; ethanol; gels; hardwood; isopropyl alcohol; lignin; methanol; moieties; pH; solvents; tetrahydrofuran
Abstract:
... A lignin-based gel (AL-PE gel) was obtained from hardwood acetic acid lignin (AL) and poly(ethylene glycol) diglycidyl ether (PE) as a cross-linker at a high AL concentration, while the reaction at a lower AL concentration yielded an amphipathic derivative (am-AL-PE). The gel has been reported to swell in aqueous ethanol but shrink in pure water and ethanol. In the present work, swelling behaviors ...
DOI:
10.1515/hf-2020-0220

11. Combined UV-irradiation and pyrolysis-GC/MS approach for evaluating the deterioration behavior of ethylene vinyl acetate

Author:
Kanako Yamada; Shogo Kumagai; Toshikazu Shiratori; Tomohito Kameda; Yuko Saito; Atsushi Watanabe; Chuichi Watanabe; Norio Teramae; Toshiaki Yoshioka
Source:
Polymer degradation and stability 2021 v.190 pp. 109623
ISSN:
0141-3910
Subject:
Fourier transform infrared spectroscopy; acetaldehyde; acetic acid; acetone; anhydrides; carbon dioxide; degradation; ethylene-vinyl acetate; irradiation; lactones; pyrolysis gas chromatography; thermal stability; thermogravimetry; ultraviolet radiation
Abstract:
... Ethylene vinyl acetate (EVA), commonly used to encapsulate photovoltaic (PV) modules, deteriorates on prolonged exposure to sunlight. In this work, fresh and deteriorated EVA samples prepared by UV irradiation (500 W m⁻²) over different periods (0–168 h) are characterized by conventional elemental analysis, microscopic observations, Fourier transform infrared (FT-IR) spectroscopy, and thermogravim ...
DOI:
10.1016/j.polymdegradstab.2021.109623

12. Cross-correlations of Biogenic Volatile Organic Compounds (BVOC) emissions typify different phenological stages and stressful events in a Mediterranean Sorghum plantation

Author:
Antonio Manco; Federico Brilli; Daniela Famulari; Daniele Gasbarra; Beniamino Gioli; Luca Vitale; Paul di Tommasi; Benjamin Loubet; Carmen Arena; Vincenzo Magliulo
Source:
Agricultural and forest meteorology 2021 v.303 pp. 108380
ISSN:
0168-1923
Subject:
Sorghum bicolor subsp. drummondii; aboveground biomass; acetaldehyde; acetic acid; acetone; adults; canopy; carbon dioxide; climate change; forests; formic acid; grain sorghum; meteorology; methanol; monoterpenoids; net ecosystem exchange; phenology; plantlets; soil; volatile organic compounds; Mediterranean region; Southern European region
Abstract:
... Climate change will affect the growing season and increase the occurrence of extreme stressful events, thus altering crop phenological phases and the associated emission of biogenic volatile organic compounds (BVOC). BVOC exchange has been poorly investigated in field crops, especially in the Mediterranean area. In this study we report continuous measurements of BVOC fluxes and CO₂ net ecosystem e ...
DOI:
10.1016/j.agrformet.2021.108380

13. Dissection and immunostaining of larval salivary glands from Anopheles gambiae mosquitoes

Author:
Chiu Michelle Z.; Lannon Steven; Luchetti Marisol; Wells Michael B.; Andrew Deborah J.
Source:
Journal of visualized experiments 2021 no.175 pp. e62989
ISSN:
1940-087X
Subject:
Anopheles gambiae; Plasmodium; acetic acid; acetone; adults; blood meal; cold; disease transmission; dissection; ethanol; hybridization; larvae; malaria; proteomics; pupae; transcriptomics; vertebrates
Abstract:
... Mosquito salivary glands (SGs) are a requisite gateway organ for the transmission of insect-borne pathogens. Disease-causing agents, including viruses and the Plasmodium parasites that cause malaria, accumulate in the secretory cavities of SG cells. Here, they are poised for transmission to their vertebrate hosts during a subsequent blood meal. As adult glands form as an elaboration of larval SG d ...
DOI:
10.3791/62989

14. Efficient catalytic degradation of toluene at a readily prepared Mn-Cu catalyst: Catalytic performance and reaction pathway

Author:
Jian-Rong Li; Wan-Peng Zhang; Chang Li; Chi He
Source:
Journal of colloid and interface science 2021 v.591 pp. 396-408
ISSN:
0021-9797
Subject:
acetaldehyde; acetic acid; acetone; benzaldehyde; benzene; benzoquinones; benzyl alcohol; catalysts; catalytic activity; coprecipitation; durability; ethanol; formaldehyde; methanol; mineralization; oxidation; oxygen; phenol; temperature; toluene
Abstract:
... Fabricating of economical transitional metal oxide-based materials with satisfied low-temperature catalytic performance and application perspective is still a challenge in deep degradation of VOCs. Here, Mn-Cu bimetallic oxides were facilely prepared by one-step hydrothermal-redox method, which displayed much higher catalytic activity in toluene oxidation than those synthesized by hydrolysis-drive ...
DOI:
10.1016/j.jcis.2021.01.096

15. Full components recovery of organic matter and indium from discarded liquid crystal display panels

Author:
Yanping Wang; Ruixue Wang; Chenglong Zhang; Jingwei Wang
Source:
Journal of cleaner production 2021 v.299 pp. 126862
ISSN:
0959-6526
Subject:
acetic acid; acetone; activated carbon; flame retardants; indium; liquid crystal display; nitrogen; oils; organic matter; phosphates; pyrolysis; reducing agents; snow
Abstract:
... In the present study, organic matter and indium were fully recycled from discarded LCD panels by microwave extraction - nitrogen pyrolysis - vacuum reduction. Triphenyl phosphate, an environmentally friendly halogen-free flame retardant, was extracted from the polarizing film using microwave extraction technology. The extraction rate under optimized conditions (acetone, 55 °C, 20 min, 1:50) was 95 ...
DOI:
10.1016/j.jclepro.2021.126862

16. Kinetic and mechanistic study of the gas-phase reaction of ozone with γ-terpinene

Author:
Layal Fayad; Cécile Coeur; Thomas Fagniez; Xavier Secordel; Nicolas Houzel; Gaël Mouret
Source:
Atmospheric environment 2021 v.246 pp. 118073
ISSN:
1352-2310
Subject:
acetaldehyde; acetic acid; acetone; atmospheric pressure; cyclohexanes; environment; formaldehyde; formic acid; metrology; oxidation; ozone; ozonolysis; reaction mechanisms; relative humidity; stainless steel; France
Abstract:
... The ozone reaction of γ-terpinene (1-isopropyl-4-methyl-1,4-cyclohexadiene), a monoterperne emitted by Elm, Cypress, Waterhickory and Maple trees, has been investigated at 294 ± 2 K, atmospheric pressure and under dry conditions (relative humidity, RH < 2%) in two simulation chambers of the LPCA laboratory in Dunkerque (France): CHARME (CHamber for the Atmospheric Reactivity and the Metrology of t ...
DOI:
10.1016/j.atmosenv.2020.118073

17. Kinetic and reaction mechanism of generated by-products in a photocatalytic oxidation reactor: Model development and validation

Author:
Mojtaba Malayeri; Chang-Seo Lee; Jianjun Niu; Jiping Zhu; Fariborz Haghighat
Source:
Journal of hazardous materials 2021 v.419 pp. 126411
ISSN:
0304-3894
Subject:
acetaldehyde; acetic acid; acetone; air pollution; carbon dioxide; commercialization; ethanol; formaldehyde; human health; irradiation; mass transfer; mineralization; model validation; models; oxidation; photocatalysis; pollutants; reaction mechanisms; relative humidity; risk; silica
Abstract:
... Photocatalytic oxidation is a promising technology to control air pollution. However, the formation of hazardous by-products hinders the commercialization application of this technology. This paper reports the development of a novel by-products predictive model considering the mass transfer of the pollutant in the gas phase and kinetic reaction in the solid phase. Two challenge compounds from keto ...
DOI:
10.1016/j.jhazmat.2021.126411

18. 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

19. Long-term observations of oxygenated volatile organic compounds (OVOCs) in an urban atmosphere in southern China, 2014–2019

Author:
Shi-Yong Xia; Chuan Wang; Bo Zhu; Xue Chen; Ning Feng; Guang-He Yu; Xiao-Feng Huang
Source:
Environmental pollution 2021 v.270 pp. 116301
ISSN:
0269-7491
Subject:
acetaldehyde; acetic acid; acetone; aerosols; air pollution; biomass; dry season; formic acid; methanol; ozone; pollution control; spectroscopy; temporal variation; volatile organic compounds; wet season; China
Abstract:
... Oxygenated volatile organic compounds (OVOCs) are important precursors and intermediate products of atmospheric photochemical reactions, which can promote the formation of secondary pollutants such as ozone (O₃) and secondary organic aerosol (SOA). However, there have been few studies on the sources of and long-term variation in ambient OVOCs. This study combined sensitive, near real-time measurem ...
DOI:
10.1016/j.envpol.2020.116301

20. Mechanism and Kinetics of Acetone Conversion to Isobutene over Isolated Hf Sites Grafted to Silicalite-1 and SiO₂

Author:
Yanfei Zhang; Liang Qi; Alicia Lund; Peng Lu; Alexis T. Bell
Source:
Journal of the American Chemical Society 2021 v.143 no.22 pp. 8352-8366
ISSN:
1520-5126
Subject:
acetic acid; acetone; activation energy; active sites; adsorption; condensation reactions; hafnium; hydrogen bonding; partial pressure; reaction kinetics; ultraviolet-visible spectroscopy
Abstract:
... Isolated hafnium (Hf) sites were prepared on Silicalite-1 and SiO₂ and investigated for acetone conversion to isobutene. Characterization by IR, ¹H MAS NMR, and UV–vis spectroscopy suggests that Hf atoms are bonded to the support via three O atoms and have one hydroxyl group, i.e, (≡SiO)₃Hf–OH. In the case of Hf/Silicalite-1, Hf–OH groups hydrogen bond with adjacent Si–OH to form (≡SiO)₃Hf–OH···HO ...
DOI:
10.1021/jacs.1c01315