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1. Pyrolysis-Gas Chromatography-Mass Spectrometry of Soil Humic Fractions: I. The Low Boiling Point Compounds

Author:
F. Martin; C. Saiz-Jimenez; A. Cert
Source:
Soil Science Society of America journal 1977 v.41 no.6 pp. 1114-1118
ISSN:
0361-5995
Subject:
Haplorthods; Hapludults; Podzols; Rhodoxeralfs; acetaldehyde; acetic acid; acetone; acetonitrile; benzene; boiling point; ethane; ethylene; fulvic acids; furfural; gas chromatography-mass spectrometry; humic acids; methane; phenol; polysaccharides; propane; propylene; proteins; pyridines; spectrometers; toluene
Abstract:
... Pyrolysis-gas chromatography-mass spectrometry studies of fulvic and humic acids from different soils: Calcic Rhodoxeralf, Typic Xerochrept, Typic Chromoxeret, Andic Hapludult, Humic Haplorthod, Typic Haplorthod and a Canadian Orthic Humo-Ferric Podzol were made. Samples were pyrolyzed at 700°C for 10 sec, and low boiling point compounds were separated in a Chromosorb 102 column. Peaks were identi ...
DOI:
10.2136/sssaj1977.03615995004100060020x

2. Olfactory response and resource utilization in Drosophila: interspecific comparisons

Author:
HOFFMANN, A.A.; PARSONS, P.A.
Source:
Biological journal of the Linnean Society 1984 v.22 no.1 pp. 43-53
ISSN:
0024-4066
Subject:
Drosophila; acetaldehyde; acetic acid; ethanol; habitats; isopropyl alcohol; longevity; methanol; propionic acid
Abstract:
... Olfactory response and resource utilization in Drosophila were compared among three domestic (D. melanogaster, D. simulans, D. immigrans) and one Australian endemic (D. lativittata) species. Olfactory response was measured in a choice type olfactometer (Fuyama, 1976). The following chemicals common in Drosophila resources were used as odourants: acetaldehyde, acetic acid, propionic acid, methanol, ...
DOI:
10.1111/j.1095-8312.1984.tb00798.x

3. Utilization and tolerance of ethanol, acetic acid and acetaldehyde vapour by Asobara persimilis, a parasitoid of Drosophila

Author:
Owen, Robin E.
Source:
Entomologia experimentalis et applicata 1985 v.39 no.2 pp. 143-147
ISSN:
0013-8703
Subject:
Asobara; Drosophila; acetaldehyde; acetic acid; ethanol; females; longevity; males; parasitoids; sexual dimorphism; toxicity; vapors
Abstract:
... The tolerance and utilization of ethanol, acetic acid and acetaldehyde vapour was investigated in Asobara persimilis (Hymenoptera: Braconidae), a parasitoid of Drosophila. No significant utilization of ethanol or acetaldehyde occurred at low concentrations (<1.5% and 0.1% respectively), however both female and male longevity was increased at concentrations of 1.0 and 1.5% acetic acid. All substanc ...
DOI:
10.1111/j.1570-7458.1985.tb03555.x

4. Single-cell protein or Rhodotorula sp. Y-38 from ethanol, acetic acid and acetaldehyde

Author:
Yech, Y.
Source:
Biotechnology letters 1996 v.18 no.4 pp. 411-416
ISSN:
0141-5492
Subject:
single cell protein; Rhodotorula; acetic acid; cell culture; acetaldehyde; amino acids; crude protein; nucleic acids; yields; ethanol
Abstract:
... Continuous cultivation of Rhodotorula sp. Y-38 was carried out on ethanol, acetic acid or acetaldehyde. At a feed concentration of 1.0% (w/v) ethanol, the cell yield of 64 g/100 g ethanol and crude protein of 52 g/100 g biomass were obtained at D=0.5 h(-1). The respective value of the content of amino acids and nucleic acids was 42.6 and 9.4 g/100 g biomass. At 2.0% (w/v) acetic acid, cell yield w ...
DOI:
10.1007/BF00143462

5. Biochemical and genetic characterization of the acetaldehyde dehydrogenase complex from Acetobacter europaeus

Author:
Thurner, C.; Vela, C.; Thony-Meyer, L.; Meile, L.; Teuber, M.
Source:
Archives of microbiology 1997 v.168 no.2 pp. 81-91
ISSN:
0302-8933
Subject:
DNA; Gluconacetobacter europaeus; Northern blotting; acetaldehyde; acetaldehyde dehydrogenase; acetic acid; aldehyde dehydrogenase; cytochrome c; glucose; heme; molecular weight; open reading frames; operon; oxidation; polyacrylamide gel electrophoresis; sequence analysis; signal peptide; transcription (genetics)
Abstract:
... The aldehyde dehydrogenase complex, which catalyzes the oxidation of acetaldehyde to acetic acid, was purified to apparent homogeneity from the membrane fraction of the industrial vinegar-producing strain Acetobacter europaeus. The determined Km for acetaldehyde was 2.1 mM. SDS-PAGE of the enzyme complex showed the presence of three different subunits with molecular masses of 79, 46, and 17 kDa, r ...
DOI:
10.1007/s002030050473
PubMed:
9238099

6. In vitro specific activities of alcohol and aldehyde dehydrogenases from two flor yeasts during controlled wine aging

Author:
Mauricio, J.C.; Moreno, J.J.; Ortega, J.M.
Source:
Journal of agricultural and food chemistry 1997 v.45 no.5 pp. 1967-1971
ISSN:
0021-8561
Subject:
Saccharomyces cerevisiae; acetaldehyde; acetic acid; alcohol dehydrogenase; aldehyde dehydrogenase; enzyme activity; ethanol; flor yeasts; isozymes; sherry; wine aging
Abstract:
... Two flor yeast strains of Saccharomyces cerevisiae (S. cerevisiae strains capensis and bayanus) which form velum on the surface of sherry wine during biological aging have been used. Aldehyde and alcohol (isoenzymes I and II) dehydrogenases were detected in vitro during the entire wine-aging process in the flor yeast strains. All enzymatic activities decreased during the first 155 days of wine agi ...
DOI:
10.1021/jf960634i

7. NADPH-dependent Reduction of Ethyl Acetoacetate Coupled with Ethanol Oxidation in Kloeckera magna

Author:
Tadashi Kometani; Yukiko Sakai; Hisae Urai; Hidefumi Yoshii; Ryuichi Matsuno
Source:
Bioscience, biotechnology, and biochemistry 1997 v.61 no.8 pp. 1370-1372
ISSN:
1347-6947
Subject:
Kloeckera; acetaldehyde; acetic acid; acetoacetic acid; aldehyde dehydrogenase; biotechnology; ethanol; glucose; oxidation; yeasts
Abstract:
... We evaluated the catalytic ability of 29 yeast strains to reduce ethyl acetoacetate (EA) in the presence of ethanol or glucose. In 18 yeast strains, the reduction in the presence of ethanol proceeded as well as in the presence of glucose. Among them, Kloeckera magna (AKU 4704) effectively catalyzed the NADPH-dependent reduction of EA in the presence of ethanol. In this reduction, 1 mol of EA was r ...
DOI:
10.1271/bbb.61.1370

8. Selective effects of sulfur dioxide and yeast starter culture addition on indigenous yeast populations and sensory characteristics of wine

Author:
Henick-Kling, T.; Edinger, W.; Daniel, P.; Monk, P.
Source:
Journal of applied microbiology 1998 v.84 no.5 pp. 865-876
ISSN:
1364-5072
Subject:
Saccharomyces cerevisiae; acetaldehyde; acetic acid; alcohols; ammonia; apples; color; fermentation; flavor; hydrogen sulfide; melons; pH; paper; pears; starter cultures; sulfur dioxide; titratable acidity; wines; yeasts
Abstract:
... Riesling musts, with or without sulfur dioxide added, were fermented either with or without the addition of yeast. Uninoculated fermentations took much longer to finish than inoculated musts. There were no significant differences in growth of non-Saccharomyces yeasts in uninoculated musts with less than 50 mg l-1 SO2 added. The starter culture was completely dominant over indigenous Saccharomyces ...
DOI:
10.1046/j.1365-2672.1998.00423.x

9. The influence of carbon dioxide on gas exchange of mungbean sprouts at aerobic and anaerobic conditions

Author:
Peppelenbos, H.W.; Brien, L.; Gorris, L.G.M.
Source:
Journal of the science of food and agriculture 1998 v.76 no.3 pp. 443-449
ISSN:
0022-5142
Subject:
bean sprouts; mung beans; gas exchange; carbon dioxide; aerobic conditions; anaerobic conditions; food packaging; controlled atmosphere storage; simulation models; oxygen; oxygen consumption; fermentation; lactic acid; ethanol; acetaldehyde; acetic acid; microbial contamination
Abstract:
... Gas-exchange models are often used to predict gas conditions inside modified atmosphere (MA) packages of fresh plant products. Current models describing CO2 production of harvested plant products do not account for an inhibition of a high partial pressure of CO2 on fermentation rates, whereas such as inhibition on plant metabolism is often found. An existing gas-exchange model was modified to incl ...
DOI:
10.1002/(SICI)1097-0010(199803)76:3<443::AID-JSFA968>3.0.CO;2-Z

10. The determination of total SO2 in grape juice. A comparison among five methods

Author:
Ferrarini, R.; Celotti, E.; Versari, A.; Galassi, S.
Source:
Food additives & contaminants 2000 v.17 no.12 pp. 973-977
ISSN:
0265-203X
Subject:
brix; polyphenols; acetic acid; food analysis; food storage; acetaldehyde; storage quality; grape juice; phosphoric acid; pH; distillation; duration; analytical methods; air flow; food safety; lactic acid
Abstract:
... The EC official method of total SO2 analysis in grape juice was modified in 1990. The main improvements concerned the amount and concentration of H3PO4 used during the distillation to recover the combined SO2 and the standardization of the distillation time at 15 min. This comparative study evaluated the total SO2 level of 12 grape juices determined by five methods, including distillation, iodimet ...
DOI:
10.1080/02652030050207756
PubMed:
11271843

11. Process control of apple winemaking by low-resolution gas-phase Fourier-transform infrared spectroscopy

Author:
Mikko Ahro; Mari Hakala; Jyrki Kauppinen; Heikki Kallio
Source:
Fresenius' journal of analytical chemistry 2001 v.371 no.4 pp. 541-549
ISSN:
0937-0633
Subject:
1-propanol; Fourier transform infrared spectroscopy; Saccharomyces cerevisiae; acetaldehyde; acetic acid; apple juice; apples; ethanol; ethyl acetate; fermentation; gas chromatography-mass spectrometry; gases; headspace analysis; juice concentrates; process control; winemaking; wines
Abstract:
... Four apple wine fermentation processes have been observed by means of direct-inlet gas-phase FTIR spectroscopy. The apple juice concentrates were each fermented by two species of Saccharomyces cerevisiae starters, and the experiment was repeated. The development of the concentrations of 1-propanol, 4-methylpyridine, acetaldehyde, acetic acid, and ethyl acetate was monitored. Two different sampling ...
DOI:
10.1007/s002160101033

12. Pyruvate decarboxylase: a key enzyme for the oxidative metabolism of lactic acid by Acetobacter pasteurianus

Author:
Raj, K.C.; Ingram, L.O.; Maupin-Furlow, J.A.
Source:
Archives of microbiology 2001 v.176 no.6 pp. 443-451
ISSN:
0302-8933
Subject:
Acetobacter pasteurianus; Escherichia coli; Zymomonas mobilis; acetaldehyde; acetic acid; aerobiosis; alcohol dehydrogenase; aldehyde dehydrogenase; amino acids; bacteria; carbon dioxide; ethanol; formaldehyde; lactic acid; mannitol; operon; pyruvate decarboxylase; pyruvic acid; transcription (genetics); yeasts
Abstract:
... Acetobacter pasteurianus, an obligately oxidative bacterium, is the first organism shown to utilize pyruvate decarboxylase (PDC) as a central enzyme for oxidative metabolism. In plants, yeast, and other bacteria, PDC functions solely as a part of the fermentative ethanol pathway. During the growth of A. pasteurianus on lactic acids, the central intermediate pyruvate is cleaved to acetaldehyde and ...
DOI:
10.1007/s002030100348
PubMed:
11734888

13. Effect of modified atmosphere composition on the metabolism of glucose by Brochothrix thermosphacta

Author:
Pin, C.; Garcia de Fernando, G.D.; Ordonez, J.A.
Source:
Applied and environmental microbiology 2002 v.68 no.9 pp. 4441-4447
ISSN:
0099-2240
Subject:
controlled atmosphere storage; carbon dioxide; oxygen; lactic acid; acetic acid; acetaldehyde; diacetyl; acetoin; ethanol; aerobic conditions; anaerobic conditions
Abstract:
... The influence of atmosphere composition on the metabolism of Brochothrix thermosphacta was studied by analyzing the consumption of glucose and the production of ethanol, acetic and lactic acids, acetaldehyde, and diacetyl-acetoin under atmospheres containing different combinations of carbon dioxide and oxygen. When glucose was metabolized under oxygen-free atmospheres, lactic acid was one of the m ...
DOI:
10.1128/AEM.68.9.4441-4447.2002
PubMed:
12200298
PubMed Central:
PMC124128

14. From the green bean to the cup of coffee: investigating coffee roasting by on-line monitoring of volatiles

Author:
Chahan Yeretzian; Alfons Jordan; Raphael Badoud; Werner Lindinger
Source:
European food research & technology 2002 v.214 no.2 pp. 92-104
ISSN:
1438-2377
Subject:
acetaldehyde; acetic acid; coffee beans; evaporation; furfural; green beans; hydrocarbons; mass spectrometry; methanol; monitoring; roasting; volatile organic compounds
Abstract:
... Volatile organic compounds (VOCs), emitted from green coffee beans, during coffee roasting and from a cup of coffee, were all analysed by proton-transfer-reaction mass spectrometry. Firstly, the headspace (HS) of green beans was investigated. Alcohols dominate the HS, but aldehydes, hydrocarbons and organic acids were also abundant. Secondly, we roasted coffee under two different conditions and mo ...
DOI:
10.1007/s00217-001-0424-7

15. Genetic changes to optimize carbon partitioning between ethanol and biosynthesis in ethanologenic Escherichia coli

Author:
Underwood, S.A.; Zhou, S.; Causey, T.B.; Yomano, L.P.; Shanmugam, K.T.; Ingram, L.O.
Source:
Applied and environmental microbiology 2002 v.68 no.12 pp. 6263-6272
ISSN:
0099-2240
Subject:
genetic transformation; genetically modified organisms; fermentation; acetic acid; Escherichia coli; pyruvic acid; xylose; nutrient availability; plasmid vectors; acetyl coenzyme A; acetaldehyde; oxidoreductases; ethanol production; acetate kinase; genetic engineering; nucleotide sequences; mutants; Zymomonas mobilis
Abstract:
... The production of ethanol from xylose by ethanologenic Escherichia coli strain KO11 was improved by adding various medium supplements (acetate, pyruvate, and acetaldehyde) that prolonged the growth phase by increasing cell yield and volumetric productivity (approximately twofold). Although added pyruvate and acetaldehyde were rapidly metabolized, the benefit of these additives continued throughout ...
DOI:
10.1128/AEM.68.12.6263-6272.2002
PubMed:
12450851
PubMed Central:
PMC134451

16. Controlled atmosphere storage of ‘Delta R2E2’ mango fruit affects production of aroma volatile compounds

Author:
H. J. D. Lalel; Zora Singh
Source:
Journal of horticultural science & biotechnology 2006 v.81 no.3 pp. 449-457
ISSN:
2380-4084
Subject:
acetaldehyde; acetic acid; air; aromatic compounds; biosynthesis; biotechnology; carbon dioxide; controlled atmosphere storage; ethanol; fermentation; fruits; horticulture; mangoes; monoterpenoids; pulp; sesquiterpenoids; storage time
Abstract:
... Uniformly mature green ‘Delta R2E2’ mangoes were stored at 13° ± 1°C in normal air (control) or in controlled atmosphere (CA) chambers containing combinations of three concentrations of O₂ (1.5%, 2% or 3%) and two levels of CO₂ (6% or 8%) to investigate the effects of CA-storage on the biosynthesis of aroma volatile compounds in ripe fruit. Fruit were removed after 24 d and 38 d of storage and rip ...
DOI:
10.1080/14620316.2006.11512087

17. Comparison of the characteristics of set type yoghurt made from ovine milk of different fat content

Author:
Kaminarides, Stelios; Stamou, Paraskeri; Massouras, Theophiles
Source:
International journal of food science & technology 2007 v.42 no.9 pp. 1019-1028
ISSN:
0950-5423
Subject:
acetaldehyde; acetic acid; acetone; citric acid; diacetyl; ewe milk; firmness; flavor; flavor compounds; galactose; high performance liquid chromatography; lactic acid; lactose; lipid content; milk; nonprotein nitrogen; pH; pyruvic acid; sheep; texture; total solids; volatile compounds; yogurt
Abstract:
... Characteristics of four types of yoghurt made from ovine milk containing 6.6%, 3.8%, 2.3%, or 0.9% fat respectively were studied. The yoghurt produced from ovine milk with high fat had the highest flavour and texture scores, fat and total solids content and firmness, but the lowest syneresis, lactic acid and galactose content. Low-fat yoghurts can be successfully produced from homogenised ovine mi ...
DOI:
10.1111/j.1365-2621.2006.01320.x

18. Degradation of ethanol plant by-products by Exophiala lecanii-corni and Saccharomyces cerevisiae in batch studies

Author:
Erica F. Pirnie-Fisker; Jennifer R. Woertz
Source:
Applied microbiology and biotechnology 2007 v.74 no.4 pp. 902-910
ISSN:
0175-7598
Subject:
Exophiala; Saccharomyces cerevisiae; acetaldehyde; acetic acid; air; carbon; emissions; energy; ethanol; ethanol production; formaldehyde; fungi; glycerol; lactic acid; methanol; plant byproducts; pollutants; public health; secondary metabolites
Abstract:
... By-product emissions from ethanol production facilities have become a public health concern. Many of these by-products are classified as hazardous air pollutants by the USEPA and current treatment methods, mainly thermal-oxidation, for these compounds are costly, energy intensive, and may produce other undesirable by-products. Degradation of these by-products by the fungi Exophiala lecanii-corni a ...
DOI:
10.1007/s00253-006-0726-6
PubMed:
17103156

19. Determination of partition coefficient of migrants in food simulants by the PRV method

Author:
Tehrany, E.A.; Mouawad, C.; Desobry, S.
Source:
Food chemistry 2007 v.105 no.4 pp. 1571-1577
ISSN:
0308-8146
Subject:
model food systems; acetic acid; headspace analysis; packaging materials migration; absorption; acetaldehyde; water; mass transfer; gas chromatography; ethanol; partition coefficients
Abstract:
... Partition coefficients of six migrants between four simulated foods (water, 10% ethanol, 3% acetic acid, 95% ethanol) and air were determined by the phase ratio variation (PRV) method using headspace analyses by gas chromatography. The migrants were ethyl acetate, methyl ethyl ketone, propyl alcohol, butyraldehyde, acetaldehyde and acetonitrile. The results showed that migrant absorption by the fo ...
DOI:
10.1016/j.foodchem.2007.01.075

20. Interaction of the 2,4-dichlorophenoxyacetic acid herbicide with soil organic matter moieties: a theoretical study

Author:
Aquino, A.J.A.; Tunega, D.; Haberhauer, G.; Gerzabek, M.H.; Lischka, H.
Source:
European journal of soil science 2007 v.58 no.4 pp. 889-899
ISSN:
1351-0754
Subject:
2,4-D; acetaldehyde; acetic acid; acid soils; anions; cations; environmental impact; humic substances; methanol; methylamine; molecular weight; organic soils; soil water
Abstract:
... The determination of the structure of humic substances from soils and natural waters is an intriguing problem in soil science. Humic substances consist of molecules covering a broad distribution of molecular size and involving different functional groups. Taking this into account, we have chosen smaller model systems with functional groups typically present in humic substances. We investigated the ...
DOI:
10.1111/j.1365-2389.2007.00928.x

21. Partition coefficient of migrants in food simulants/polymers systems

Author:
Tehrany, E.A.; Desobry, S.
Source:
Food chemistry 2007 v.101 no.4 pp. 1714-1718
ISSN:
0308-8146
Subject:
model food systems; acetic acid; acetates; packaging materials; packaging materials migration; amides; food packaging; acetaldehyde; water; polyethylene; mass transfer; ethanol
Abstract:
... Partition coefficients of six migrants (ethyl acetate, acetaldehyde, acetonitrile, methyl ethyl ketone, isopropyl acetate and butyraldehyde) were determined between four food simulants (water, 10% ethanol, 3% acetic acid and 95% ethanol) and two polymers (polyamide and polyethylene terephthalate). The results showed that partition coefficient is highly dependent on the nature of the migrant, polym ...
DOI:
10.1016/j.foodchem.2006.03.058

22. Photo-induced cold vapor generation with low molecular weight alcohol, aldehyde, or carboxylic acid for atomic fluorescence spectrometric determination of mercury

Author:
Han, Chunfang; Zheng, Chengbin; Wang, Jun; Cheng, Guanglei; Lv, Yi; Hou, Xiandeng
Source:
Analytical and bioanalytical chemistry 2007 v.388 no.4 pp. 825-830
ISSN:
1618-2642
Subject:
acetaldehyde; acetic acid; aqueous solutions; cold; detection limit; fluorescence; formaldehyde; glycerol; malonic acid; mercury; methanol; molecular weight; oxalic acid; reducing agents; ultraviolet radiation; vapors
Abstract:
... With UV irradiation, Hg²⁺ in aqueous solution can be converted into Hg⁰ cold vapor by low molecular weight alcohols, aldehydes, or carboxylic acids, e.g., methanol, formaldehyde, acetaldehyde, glycol, 1,2-propanediol, glycerol, acetic acid, oxalic acid, or malonic acid. It was found that the presence of nano-TiO₂ more or less improved the efficiency of the photo-induced chemical/cold vapor generat ...
DOI:
10.1007/s00216-006-1006-0
PubMed:
17216165

23. Response of wine yeast (Saccharomyces cerevisiae) aldehyde dehydrogenases to acetaldehyde stress during Icewine fermentation

Author:
G.M. Pigeau; D.L. Inglis
Source:
Journal of applied microbiology 2007 v.103 no.5 pp. 1576-1586
ISSN:
1364-5072
Subject:
Saccharomyces cerevisiae; acetaldehyde; acetaldehyde dehydrogenase; acetic acid; aldehyde dehydrogenase; fermentation; gene expression regulation; genes; glycerol; juices; osmotic stress; wine yeasts; wines
Abstract:
... Aims: We previously reported that the aldehyde dehydrogenase encoded by ALD3 but not ALD6 was responsible, in part, for the increased acetic acid found in Icewines based on the expression profile of these genes during fermentation. We have now completed the expression profile of the remaining yeast aldehyde dehydrogenase genes ALD2, ALD4 and ALD5 during these fermentations to determine their contr ...
DOI:
10.1111/j.1365-2672.2007.03381.x

24. Volatile organic compounds emissions in Norway spruce (Picea abies) in response to temperature changes

Author:
Filella, Iolanda; Wilkinson, Michael J.; Llusià, Joan; Hewitt, C. Nicholas; Peñuelas, Josep
Source:
Physiologia plantarum 2007 v.130 no.1 pp. 58-66
ISSN:
0031-9317
Subject:
Picea abies; acetaldehyde; acetic acid; acetone; algorithms; emissions; leaves; light intensity; methanol; methyl salicylate; monitoring; monoterpenoids; prediction; protons; saplings; spectrometers; stomatal conductance; temperature; volatile organic compounds
Abstract:
... Volatile organic compound (VOC) emissions from Norway spruce (Picea abies) saplings were monitored in response to a temperature ramp. Online measurements were made with a proton transfer reaction - mass spectrometer under controlled conditions, together with plant physiological variables. Masses corresponding to acetic acid and acetone were the most emitted VOCs. The emission rates of m137 (monote ...
DOI:
10.1111/j.1399-3054.2007.00881.x

25. Effects of ADH2 Overexpression in Saccharomyces bayanus during Alcoholic Fermentation

Author:
Maestre, Oscar; García-Martínez, Teresa; Peinado, Rafael A.; Mauricio, Juan C.
Source:
Applied and environmental microbiology 2008 v.74 no.3 pp. 702-707
ISSN:
0099-2240
Subject:
NAD (coenzyme); Saccharomyces; acetaldehyde; acetic acid; acetoin; alcohol dehydrogenase; alcoholic fermentation; bioactive properties; cell growth; ethanol; gene overexpression; genes; glucose; glycerol; glycolysis; metabolites; metabolome; redox potential; wine aging; yeasts
Abstract:
... The effect of overexpression of the gene ADH2 on metabolic and biological activity in Saccharomyces bayanus V5 during alcoholic fermentation has been evaluated. This gene is known to encode alcohol dehydrogenase II (ADH II). During the biological aging of sherry wines, where yeasts have to grow on ethanol owing to the absence of glucose, this isoenzyme plays a prominent role by converting the etha ...
DOI:
10.1128/AEM.01805-07
PubMed:
18065623
PubMed Central:
PMC2227724

26. Interannual and seasonal changes in the soil exchange rates of monoterpenes and other VOCs in a Mediterranean shrubland

Author:
Asensio, D.; Peñuelas, J.; Prieto, P.; Estiarte, M.; Filella, I.; Llusià, J.
Source:
European journal of soil science 2008 v.59 no.5 pp. 878-891
ISSN:
1351-0754
Subject:
acetaldehyde; acetates; acetic acid; acetone; drought; emissions; foliar uptake; inventories; methanol; monoterpenoids; phenology; roots; seasonal variation; shrublands; soil ecology; soil temperature; soil water; volatile organic compounds
Abstract:
... Information about soil VOC inventories and exchange rates in different soils is very scarce. Seasonality of soil VOC exchange rates is also largely unknown, despite the increasing interest in some soil volatile compounds, such as monoterpenes, because of their important role in soil ecology. We aimed to explore and quantify soil VOC exchange rates in a Mediterranean shrubland and their seasonality ...
DOI:
10.1111/j.1365-2389.2008.01057.x

27. Isolation and characterization of Oenococcus oeni from Aglianico wines

Author:
Sico, Maria Anna; Bonomo, Maria Grazia; Salzano, Giovanni
Source:
World journal of microbiology & biotechnology 2008 v.24 no.9 pp. 1829-1835
ISSN:
0959-3993
Subject:
Oenococcus oeni; acetaldehyde; acetic acid; ethanol; malolactic fermentation; polymerase chain reaction; starter cultures; sulfur dioxide; temperature; wines
Abstract:
... A technological characterization of Oenococcus oeni strains isolated from Aglianico wines was performed to select starter cultures for malolactic fermentation (MLF). One hundred and fifty six O. oeni isolates were extracted from Aglianico wines, and identified by using species-specific PCR. Malolactic activity (MLA), sulphur dioxide (SO₂) resistance, acetaldehyde metabolism and other technological ...
DOI:
10.1007/s11274-008-9677-7

28. Microbiological and biochemical profile of cv. Conservolea naturally black olives during controlled fermentation with selected strains of lactic acid bacteria

Author:
Panagou, E.Z.; Schillinger, U.; Franz, C.M.A.P.; Nychas, G.J.E.
Source:
Food microbiology 2008 v.25 no.2 pp. 348-358
ISSN:
0740-0020
Subject:
Lactobacillus plantarum; Lactobacillus pentosus; propionic acid; flavor compounds; lactic acid; fermentation; acetaldehyde; titratable acidity; citric acid; Gram-negative bacteria; volatile compounds; competitive exclusion; anaerobic conditions; yeasts; Olea europaea; ethanol; starter cultures; acetic acid; salts; methanol; lactic acid bacteria; condiments; olives; pH; Greece
Abstract:
... The effect of controlled fermentation processes on the microbial association and biochemical profile of cv. Conservolea naturally black olives processed by the traditional anaerobic method was studied. The different treatments included (a) inoculation with a commercial starter culture of Lactobacillus pentosus, (b) inoculation with a strain of Lactobacillus plantarum isolated from a fermented cass ...
DOI:
10.1016/j.fm.2007.10.005
PubMed:
18206777

29. Oenococcus oeni cells immobilized on delignified cellulosic material for malolactic fermentation of wine

Author:
Agouridis, Nikolaos; Kopsahelis, Nikolaos; Plessas, Stavros; Koutinas, Athanasios A.; Kanellaki, Maria
Source:
Bioresource technology 2008 v.99 no.18 pp. 9017-9020
ISSN:
0960-8524
Subject:
grape must; malolactic fermentation; Oenococcus oeni; immobilized cells; starter cultures; cellulosic materials; alcoholic fermentation; Saccharomyces cerevisiae; malic acid; lactic acid; acetic acid; ethanol; acetaldehyde; food composition; winemaking
Abstract:
... Oenococcus oeni ATCC 23279 cells immobilized on delignified cellulosic material (DCM) were used for malolactic fermentation (MLF). In first, eleven repeated alcoholic fermentation batches of white must of 11-12°Be initial density were performed by Saccharomyces cerevisiae cells immobilized on delignified cellulosic material at 20°C. Subsequently, the induction of MLF in the eleven taken wine batch ...
DOI:
10.1016/j.biortech.2008.04.026
PubMed:
18501594

30. The PQQ-alcohol dehydrogenase of Gluconacetobacter diazotrophicus

Author:
Gómez-Manzo, Saúl; Contreras-Zentella, Martha; González-Valdez, Alejandra; Sosa-Torres, Martha; Arreguín-Espinoza, Roberto; Escamilla-Marván, Edgardo
Source:
International journal of food microbiology 2008 v.125 no.1 pp. 71-78
ISSN:
0168-1605
Subject:
Gluconacetobacter diazotrophicus; acetaldehyde; acetic acid; acetic acid bacteria; alcohol dehydrogenase; cytochrome c; enzyme activity; ethanol; fluorescence; isoelectric point; molecular weight; nitrogen fixation; oxidation; pH; potassium; sugarcane; ultraviolet-visible spectroscopy
Abstract:
... The oxidation of ethanol to acetic acid is the most characteristic process in acetic acid bacteria.Gluconacetobacter diazotrophicus is rather unique among the acetic acid bacteria as it carries out nitrogen fixation and is a true endophyte, originally isolated from sugar cane. Aside its peculiar life style, Ga. diazotrophicus, possesses a constitutive membrane-bound oxidase system for ethanol. The ...
DOI:
10.1016/j.ijfoodmicro.2007.10.015
PubMed:
18321602

31. Anaerobic ethylene glycol degradation by microorganisms in poplar and willow rhizospheres

Author:
Carnegie, D.; Ramsay, J. A.
Source:
Biodegradation 2009 v.20 no.4 pp. 551-558
ISSN:
0923-9820
Subject:
Populus; acetaldehyde; acetic acid; alfalfa; biodegradation; carbon dioxide; ethanol; ethylene glycol; fermentation; fertilizers; groundwater; methane production; mineralization; nitrates; phytoremediation; rhizosphere; soil; stoichiometry; sulfates
Abstract:
... Although aerobic degradation of ethylene glycol is well documented, only anaerobic biodegradation via methanogenesis or fermentation has been clearly shown. Enhanced ethylene glycol degradation has been demonstrated by microorganisms in the rhizosphere of shallow-rooted plants such as alfalfa and grasses where conditions may be aerobic, but has not been demonstrated in the deeper rhizosphere of po ...
DOI:
10.1007/s10532-008-9244-9

32. The influence of disinfection on aquatic biodegradable organic carbon formation

Author:
Świetlik, J.; Raczyk-Stanisławiak, U.; Nawrocki, J.
Source:
Water research 2009 v.43 no.2 pp. 463-473
ISSN:
0043-1354
Subject:
acetic acid; ozonation; ozone; water treatment; acetaldehyde; formic acid; dissolved organic carbon; biodegradation; disinfection; oxalic acid; molecular weight; chlorine dioxide; formaldehyde; Poland
DOI:
10.1016/j.watres.2008.10.021
PubMed:
18980774

33. The use of selected starter Saccharomyces cerevisiae strains to produce traditional and industrial cachaça: a comparative study

Author:
Marini, Marjorie M.; Gomes, Fátima C. O.; Silva, Carol L. C.; Cadete, Raquel M.; Badotti, Fernanda; Oliveira, Evelyn S.; Cardoso, Carlos R.; Rosa, Carlos A.
Source:
World journal of microbiology & biotechnology 2009 v.25 no.2 pp. 235-242
ISSN:
0959-3993
Subject:
Saccharomyces cerevisiae; acetaldehyde; acetic acid; acidity; beverages; distillation; esters; ethanol; fermentation; glycerol; mitochondrial DNA; odors; stainless steel; starter cultures; tanks; taste
Abstract:
... Six Saccharomyces cerevisiae strains from cachaça fermentation were characterized for biomass, ethanol, glycerol, and acetic acid yields, as well as productivity. Three strains presenting the best fermentation parameters were selected for cachaça production. The experiments were carried out in an industrial distillery that distills this beverage in a stainless steel column, and in a traditional di ...
DOI:
10.1007/s11274-008-9884-2

34. Acetic acid removal by Saccharomyces cerevisiae during fermentation in oenological conditions. Metabolic consequences

Author:
Vasserot, Y.; Mornet, F.; Jeandet, P.
Source:
Food chemistry 2010 v.119 no.3 pp. 1220-1223
ISSN:
0308-8146
Subject:
chemical concentration; acetic acid; succinic acid; wine quality; alcoholic fermentation; glycerol; Saccharomyces cerevisiae; acetaldehyde; grape juice; winemaking; microbial growth; food composition; wine yeasts
Abstract:
... The commercial Saccharomyces cerevisiae strains used in champagne winemaking were tested for their ability to metabolise acetic acid during alcoholic fermentation. Fermentation tests were performed in conditions close to oenological ones using a Chardonnay grape juice supplemented with acetic acid. The amount of acetic acid metabolised by wine yeast increased with increasing initial acetic acid co ...
DOI:
10.1016/j.foodchem.2009.08.008

35. Alcohol dehydrogenase of acetic acid bacteria: structure, mode of action, and applications in biotechnology

Author:
Yakushi, Toshiharu; Matsushita, Kazunobu
Source:
Applied microbiology and biotechnology 2010 v.86 no.5 pp. 1257-1265
ISSN:
0175-7598
Subject:
acetaldehyde; acetic acid; acetic acid bacteria; alcohol dehydrogenase; biotechnology; electrochemistry; electron transfer; ethanol; fermentation; fuel cells; habitats; heme; mechanism of action; oxidation; oxygen; technology transfer
Abstract:
... Pyrroquinoline quinone-dependent alcohol dehydrogenase (PQQ-ADH) of acetic acid bacteria is a membrane-bound enzyme involved in the acetic acid fermentation by oxidizing ethanol to acetaldehyde coupling with reduction of membranous ubiquinone (Q), which is, in turn, re-oxidized by ubiquinol oxidase, reducing oxygen to water. PQQ-ADHs seem to have co-evolved with the organisms fitting to their own ...
DOI:
10.1007/s00253-010-2529-z
PubMed:
20306188

36. Cachaça production in a lab-scale alembic: modeling and computational simulation

Author:
SCANAVINI, HELENA F.A.; CERIANI, ROBERTA; CASSINI, CARLOS E.B.; SOUZA, ELSON L.R.; MAUGERI FILHO, FRANCISCO; MEIRELLES, ANTONIO J.A.
Source:
Journal of food process engineering 2010 v.33 no.s1 pp. 226-252
ISSN:
0145-8876
Subject:
acetaldehyde; acetates; acetic acid; acidity; boiling point; cutting; distillates; distillation; energy; equations; ethanol; head; heart; isoamyl alcohol; issues and policy; methanol; product quality; simulation models; tail; temperature; vapors; wines
Abstract:
... This work presents the application of a differential distillation model for the simulation of cachaça production in a pot still (alembic). The vapor-liquid equilibria of the multicomponent mixture were described in a rigorous way, using the nonrandom two-liquid model for the liquid phase activity coefficients and the virial equation with the chemical theory for the vapor phase fugacity coefficient ...
DOI:
10.1111/j.1745-4530.2008.00352.x

37. Effects of acetic acid, ethanol, and SO₂ on the removal of volatile acidity from acidic wines by two Saccharomyces cerevisiae commercial strains

Author:
Vilela-Moura, Alice; Schuller, Dorit; Mendes-Faia, Arlete; Côrte-Real, Manuela
Source:
Applied microbiology and biotechnology 2010 v.87 no.4 pp. 1317-1326
ISSN:
0175-7598
Subject:
Saccharomyces cerevisiae; acetaldehyde; acetates; acetic acid; acidity; apples; bananas; deacidification; detection limit; ethanol; fatty acid composition; fermentation; filtration; odors; pineapples; stress tolerance; sulfur dioxide; volatile compounds; wines
Abstract:
... Herein, we report the influence of different combinations of initial concentration of acetic acid and ethanol on the removal of acetic acid from acidic wines by two commercial Saccharomyces cerevisiae strains S26 and S29. Both strains reduced the volatile acidity of an acidic wine (1.0 g l⁻¹ acetic acid and 11% (v/v) ethanol) by 78% and 48%, respectively. Acetic acid removal by strains S26 and S29 ...
DOI:
10.1007/s00253-010-2558-7

38. Elimination of Glycerol Production in Anaerobic Cultures of a Saccharomyces cerevisiae Strain Engineered To Use Acetic Acid as an Electron Acceptor

Author:
Medina, Víctor Guadalupe; Almering, Marinka J.H.; van Maris, Antonius J.A.; Pronk, Jack T.
Source:
Applied and environmental microbiology 2010 v.76 no.1 pp. 190-195
ISSN:
0099-2240
Subject:
NAD (coenzyme); Saccharomyces cerevisiae; acetaldehyde; acetates; acetic acid; acetyl coenzyme A; byproducts; electrons; engineering; ethanol; ethanol production; fermentation; gene deletion; genes; glycerol; glycerol-3-phosphate dehydrogenase; hydrolysates; osmotolerance; stoichiometry; yeasts
Abstract:
... In anaerobic cultures of wild-type Saccharomyces cerevisiae, glycerol production is essential to reoxidize NADH produced in biosynthetic processes. Consequently, glycerol is a major by-product during anaerobic production of ethanol by S. cerevisiae, the single largest fermentation process in industrial biotechnology. The present study investigates the possibility of completely eliminating glycerol ...
DOI:
10.1128/AEM.01772-09
PubMed:
19915031
PubMed Central:
PMC2798634

39. Chemical composition and sensory analysis of cheese whey-based beverages using kefir grains as starter culture

Author:
Magalhães, Karina Teixeira; Dias, Disney Ribeiro; de Melo Pereira, Gilberto Vinicius; Oliveira, José Maria; Domingues, Lucília; Teixeira, José António; de Almeida e Silva, João Batista; Schwan, Rosane Freitas
Source:
International journal of food science & technology 2011 v.46 no.4 pp. 871-878
ISSN:
0950-5423
Subject:
acetaldehyde; acetates; acetic acid; beverages; cheese whey; cheeses; chemical composition; ethanol; fermentation; high performance liquid chromatography; isoamyl alcohol; kefir; lactic acid; lactose; milk; sensory evaluation; sensory properties; starter cultures
Abstract:
... The aim of the present work was to evaluate the use of the kefir grains as a starter culture for tradicional milk kefir beverage and for cheese whey-based beverages production. Fermentation was performed by inoculating kefir grains in milk (ML), cheese whey (CW) and deproteinised cheese whey (DCW). Erlenmeyers containing kefir grains and different substrates were statically incubated for 72 h at 2 ...
DOI:
10.1111/j.1365-2621.2011.02570.x

40. Comparative study of the biochemical changes and volatile compound formations during the production of novel whey-based kefir beverages and traditional milk kefir

Author:
Karina T. Magalhães; Giuliano Dragone; Gilberto V. de Melo Pereira; José M. Oliveira; Lucília Domingues; José A. Teixeira; João B. Almeida e Silva; Rosane F. Schwan
Source:
Food chemistry 2011 v.126 no.1 pp. 249-253
ISSN:
0308-8146
Subject:
acetaldehyde; acetates; acetic acid; beverages; cheese whey; ethanol; ethanol production; fermentation; kefir; lactic acid; lactose; milk; volatile organic compounds; whey cheeses
Abstract:
... Cheese whey (CW) and deproteinised cheese whey (DCW) were investigated for their suitability as novel substrates for the production of kefir-like beverages. Lactose consumption, ethanol production, as well as organic acids and volatile compounds formation, were determined during CW and DCW fermentation by kefir grains and compared with values obtained during the production of traditional milk kefi ...
DOI:
10.1016/j.foodchem.2010.11.012

41. Comparison of aroma compounds in naturally fermented and inoculated Chinese soybean pastes by GC-MS and GC-Olfactometry analysis

Author:
Jianxin Zhao; Xiaojun Dai; Xiaoming Liu; Hao Zhang; Jian Tang; Wei Chen
Source:
Food control 2011 v.22 no.6 pp. 1008-1013
ISSN:
0956-7135
Subject:
acetaldehyde; acetic acid; benzene; fermentation; microbial communities; odor compounds; odors; pastes; raw materials; rice; sourness; soy sauce; soybeans; yeasts
Abstract:
... The industrial fermentation of Chinese soybean pastes has the advantages of high production efficiency and quality consistency. However, the aroma of the current industrial products (with inoculation) is often less satisfactory than the naturally fermented products. In this study, the volatile compounds of natural fermented and inoculated Chinese soybean pastes were evaluated and compared. Results ...
DOI:
10.1016/j.foodcont.2010.11.023

42. Ethanol production from sugar beet molasses by S. cerevisiae entrapped in an alginate–maize stem ground tissue matrix

Author:
R. Razmovski; V. Vučurović
Source:
Enzyme and microbial technology 2011 v.48 no.4-5 pp. 378-385
ISSN:
0141-0229
Subject:
Saccharomyces cerevisiae; acetaldehyde; acetic acid; biofilm; combs (social insects); corn; ethanol; ethanol fermentation; ethanol production; ethyl acetate; mass transfer; molasses; porosity; sugar beet
Abstract:
... A new alginate–maize stem ground tissue matrix was developed as a Saccharomyces cerevisiae carrier for ethanol fermentation from sugar beet molasses. There were several fermentation procedures in the present study: using free cells and alginate-entrapped cells with and without maize stem ground tissue supplementation (F; F+C; AB; AB+C), and using a new combined alginate–maize stem ground tissue ca ...
DOI:
10.1016/j.enzmictec.2010.12.015

43. In vitro effects of ethanol and mouthrinse on permeability in an oral buccal mucosal tissue construct

Author:
Francis Koschier; Vsevolod Kostrubsky; Colleen Toole; Michael A. Gallo
Source:
Food and chemical toxicology 2011 v.49 no.10 pp. 2524-2529
ISSN:
0278-6915
Subject:
acetaldehyde; acetic acid; caffeine; culture media; cytotoxicity; ethanol; high performance liquid chromatography; histopathology; metabolism; models; permeability; pretreatment; tissues; toxicology; viability
Abstract:
... The current study investigated the influence of ethanol and ethanol-containing mouthrinses on model chemical permeability in an in vitro oral buccal mucosal construct (EpiOral, ORL-200, MatTek). Innate ethanol transport and metabolism in the tissue construct was also studied. Caffeine flux in buccal tissue was measured after pre-treatment with < 26.9% ethanol or Listerine® products under condition ...
DOI:
10.1016/j.fct.2011.06.018

44. Kinetics of sugars, organic acids and acetaldehyde during simultaneous yeast-bacterial fermentations of white wine at different pH values

Author:
Wei Pan; Delphine Jussier; Nicolas Terrade; Rickey Y. Yada; Ramón Mira de Orduña
Source:
Food research international 2011 v.44 no.3 pp. 660-666
ISSN:
0963-9969
Subject:
acetaldehyde; acetic acid; alcohol abuse; bacteria; ethanol; fructose; glucose; malolactic fermentation; pH; reaction kinetics; white wines; winemaking; yeasts
Abstract:
... Successfully inducing malolactic fermentation in the production of grape wines can be challenging, especially in wines with multiple inhibitors such as low pH values and high ethanol concentrations. In the present study, the kinetics of several chemicals of enological relevance was studied in Chardonnay vinified by traditional, consecutive alcoholic (AF) and malolactic fermentations (MLF), and sim ...
DOI:
10.1016/j.foodres.2010.09.041

45. Recovery of acetic acid from simulated acetaldehyde wastewaters: Bipolar membrane electrodialysis processes and membrane selection

Author:
Xu Zhang; Chuanrun Li; Yaoming Wang; Jingyi Luo; Tongwen Xu
Source:
Journal of membrane science 2011 v.379 no.1-2 pp. 184-190
ISSN:
0376-7388
Subject:
acetaldehyde; acetic acid; anion exchange resins; artificial membranes; cation exchange; dialysis; dielectric spectroscopy; electrical resistance; electrodes; energy; gels; wastewater
Abstract:
... The recovery of acetic acid from simulated acetaldehyde wastewaters by BMED (bipolar membrane electrodialysis) process was studied in two steps. Firstly, selection of commercial membranes for acetic acid recovery was investigated through experimentation of diffusion dialysis, determination of membrane stability in acetic acid solution, and measurement of MER (membrane electrical resistance) of mon ...
DOI:
10.1016/j.memsci.2011.05.059

46. The Role of Frass and Cocoon Volatiles in Host Location by Monodontomerus aeneus, a Parasitoid of Megachilid Solitary Bees

Author:
Filella, Iolanda; Bosch, Jordi; Llusia, Joan; Seco, Roger; Penuelas, Josep
Source:
Environmental entomology 2011 v.40 no.1 pp. 126-131
ISSN:
0046-225X
Subject:
Monodontomerus aeneus; Osmia; acetaldehyde; acetic acid; cocoons; frass; methanol; oviposition; parasitic wasps; prepupae; pupae; solitary bees
Abstract:
... Monodontomerus aeneus (Fonscolombe) is a parasitic wasp that oviposits on the prepupae and pupae of Osmia cornuta (Latreille) and other solitary bee species. A two-armed olfactometer was used to test the olfactory attractiveness of O. cornuta prepupae, cocoon, and larval frass to female M. aeneus. Both cocoon and frass attracted the female parasitoids, but frass alone was more attractive than the ...
DOI:
10.1603/EN10165
PubMed:
22182621

47. Transformation of levoglucosan over H-MCM-22 zeolite and H-MCM-41 mesoporous molecular sieve catalysts

Author:
M. Käldström; N. Kumar; T. Heikkilä; M. Tiitta; T. Salmi; D. Yu. Murzin
Source:
Biomass and bioenergy 2011 v.35 no.5 pp. 1967-1976
ISSN:
0961-9534
Subject:
acetaldehyde; acetic acid; catalysts; formaldehyde; furfural; zeolites
Abstract:
... Catalytic transformation of levoglucosan (1-6-anhdyro-β-d-glucopyranose) was carried out in a fixed bed reactor at 573 K over zeolite and mesoporous material catalysts. Proton forms of MCM-22-30 and MCM-41-20 catalysts were tested in the conversion, changing also the residence time. The yield of the transformation product phases was substantially influenced by the structures, at the same time the ...
DOI:
10.1016/j.biombioe.2011.01.046

48. A new cataluminescence gas sensor based on SiO₂ nanotubes fabricated using carbon nanotube templates

Author:
Yali Wang; Xiaoan Cao; Jinwen Li; Nan Chen
Source:
Talanta 2011 v.84 no.3 pp. 977-982
ISSN:
0039-9140
Subject:
acetaldehyde; acetic acid; acetone; ammonia; benzene; carbon nanotubes; detection limit; ethanol; ethyl acetate; formaldehyde; methanol; nanoparticles; silica; surface area; temperature; vapors; wavelengths
Abstract:
... In the present work, two morphologies of SiO₂ nanomaterials (SiO₂ nanotubes and nanoparticles) have been successfully synthesized in supercritical fluids (SCFs). The cataluminescence (CTL) features of the two SiO₂ nanomaterials to some common harmful gases were compared, and the results showed that SiO₂ nanotubes had better CTL sensing characteristic to some common harmful gases. The SiO₂ nanotube ...
DOI:
10.1016/j.talanta.2011.02.047

49. Diacetyl levels and volatile profiles of commercial starter distillates and selected dairy foods

Author:
M.I. Rincon-Delgadillo; A. Lopez-Hernandez; I. Wijaya; S.A. Rankin
Source:
Journal of dairy science 2012 v.95 no.3 pp. 1128-1139
ISSN:
0022-0302
Subject:
vegetable oil; margarine; butyric acid; formic acid; propionic acid; mass spectrometry; odors; distillates; alcohols; benzaldehyde; processed cheeses; good manufacturing practices; fermentation; cottage cheese; lactones; sour cream; headspace analysis; acetaldehyde; solid phase microextraction; ingredients; volatile compounds; citrates; diacetyl; Lactococcus lactis subsp. lactis bv. diacetylactis; flavor; starter cultures; acetic acid; GRAS substances; furfural; Leuconostoc; acetoin; gas chromatography; bacteria; United States
Abstract:
... Starter distillates (SDL) are used as ingredients in the formulation of many food products such as cottage cheese, margarine, vegetable oil spreads, processed cheese, and sour cream to increase the levels of naturally occurring buttery aroma associated with fermentation. This buttery aroma results, in part, from the presence of the vicinal dicarbonyl, diacetyl, which imparts a high level of butter ...
DOI:
10.3168/jds.2011-4834
PubMed:
22365196

50. Green leaf volatiles and oxygenated metabolite emission bursts from mesquite branches following light–dark transitions

Author:
K. Jardine; G. A. Barron-Gafford; J. P. Norman; L. Abrell; R. K. Monson; K. T. Meyers; M. Pavao-Zuckerman; K. Dontsova; E. Kleist; C. Werner; T. E. Huxman
Source:
Photosynthesis research 2012 v.113 no.1-3 pp. 321-333
ISSN:
0166-8595
Subject:
acetaldehyde; acetates; acetic acid; acetone; acetyl coenzyme A; branches; ethanol; fatty acid metabolism; leaves; metabolites; photophase; photosynthesis; stress response
Abstract:
... Green leaf volatiles (GLVs) are a diverse group of fatty acid-derived compounds emitted by all plants and are involved in a wide variety of developmental and stress-related biological functions. Recently, GLV emission bursts from leaves were reported following light–dark transitions and hypothesized to be related to the stress response while acetaldehyde bursts were hypothesized to be due to the ‘ ...
DOI:
10.1007/s11120-012-9746-5
PubMed:
22711426

51. Identification of the active species in oxidation reactions on mixed oxide catalysts: Supra-surface or bulk surface species

Author:
B. Mehlomakulu; T.T.N. Nguyen; P. Delichère; E. van Steen; J.M.M. Millet
Source:
Journal of catalysis 2012 v.289 no. pp. 1-10
ISSN:
0021-9517
Subject:
acetaldehyde; acetic acid; active sites; catalysts; cations; ethanol; ethyl acetate; ethyl ether; oxidation; oxides; temperature; vanadium
Abstract:
... Mixed metal oxides have been used as catalysts for the partial oxidation of ethanol to acetaldehyde. The solids were shown to be active and selective for the reaction at relatively low temperature. Various physical techniques have been used to establish the active sites for this reaction and understand the role of the different elements. The results obtained showed that Brønsted acidic sites were ...
DOI:
10.1016/j.jcat.2012.01.001

52. Impact of mixed S. cerevisiae strains on the production of volatiles and estimated sensory profiles of Chardonnay wines

Author:
S. Saberi; M.A. Cliff; H.J.J. van Vuuren
Source:
Food research international 2012 v.48 no.2 pp. 725-735
ISSN:
0963-9969
Subject:
Saccharomyces cerevisiae; acetaldehyde; acetates; acetic acid; alcohols; analysis of variance; apples; bananas; fermentation; fruits; gas chromatography; grape must; mass spectrometry; mixed culture; odors; pears; principal component analysis; radar; strawberries; vinegars; volatile compounds; wine industry; wine quality; wine yeasts; wines
Abstract:
... The global wine industry is mostly reliant on the use of active dry yeasts to conduct wine fermentations. The use of single industrial yeasts, however, may result in the loss of complexity or uniqueness of the wine bouquet; the option of fermenting grape musts with multiple active dried yeast strains could enhance the complexity and quality of wines. Two novel Burgundian Saccharomyces cerevisiae s ...
DOI:
10.1016/j.foodres.2012.06.012

53. Metabolism of SO₂ binding compounds by Oenococcus oeni during and after malolactic fermentation in white wine

Author:
J.N. Jackowetz; R. Mira de Orduña
Source:
International journal of food microbiology 2012 v.155 no.3 pp. 153-157
ISSN:
0168-1605
Subject:
Oenococcus oeni; acetaldehyde; acetic acid; additives; bacteria; biogenic amines; carbonyl compounds; consumer demand; galacturonic acid; malic acid; malolactic fermentation; pyruvic acid; risk; spoilage; sulfur dioxide; white wines; winemaking
Abstract:
... Sulfur dioxide (SO₂) is the key additive for the preservation of wines. Carbonyl and keto compounds in wine can bind to SO₂ and decrease its efficacy, resulting in higher total SO₂ requirements. Increased consumer demand for low sulfite and organic wines pose production challenges if SO₂ binders have not been properly managed during vinification. Malolactic fermentation (MLF) has been known to red ...
DOI:
10.1016/j.ijfoodmicro.2012.01.025
PubMed:
22417710

54. Odor compounds from different sources of landfill: Characterization and source identification

Author:
Jing-Jing Fang; Na Yang; Dan-Yan Cen; Li-Ming Shao; Pin-Jing He
Source:
Waste management 2012 v.32 no.7 pp. 1401-1410
ISSN:
0956-053X
Subject:
acetaldehyde; acetic acid; acetone; ammonia; benzene; carbon disulfide; cluster analysis; dimethyl sulfide; drying; hydrogen sulfide; landfills; methanethiol; methanol; methylamine; municipal solid waste; odor compounds; principal component analysis; sludge; styrene; sulfur; toluene; trimethylamine; valeric acid; volatile fatty acids; wells; xylene
Abstract:
... This study investigated the odor compounds from different areas in a landfill site, which included the municipal solid waste (MSW)-related area, the leachate-related area and the sludge-related area. Nine sampling points were placed and 35 types of odorous substances were measured and quantified from these grabbed samples. The results showed that the main odorous substances emitted from landfill s ...
DOI:
10.1016/j.wasman.2012.02.013

55. Regioselective homolytic substitution of benzo[c][2,7]naphthyridines

Author:
Alois Plodek; Stephan Raeder; Franz Bracher
Source:
Tetrahedron 2012 v.68 no.24 pp. 4693-4700
ISSN:
0040-4020
Subject:
acetaldehyde; acetic acid; alkaloids; chemical structure; free radicals; manganese dioxide; methylation
Abstract:
... Benzo[c][2,7]naphthyridines bearing electron-withdrawing substituents (bromo, acetyl) at C-4 undergo regioselective homolytic substitutions at C-5 with nucleophilic 1,3,5-trioxanyl and ethoxycarbonyl radicals under Minisci conditions. Surprisingly, mainly 5,6-dihydro derivatives are formed in these reactions. Rearomatization with manganese dioxide leads to 4,5-disubstituted benzo[c][2,7]naphthyrid ...
DOI:
10.1016/j.tet.2012.04.023

56. Temperature and water loss affect ADH activity and gene expression in grape berry during postharvest dehydration

Author:
Marco Cirilli; Andrea Bellincontro; Diana De Santis; Rinaldo Botondi; Maria Chiara Colao; Rosario Muleo; Fabio Mencarelli
Source:
Food chemistry 2012 v.132 no.1 pp. 447-454
ISSN:
0308-8146
Subject:
acetaldehyde; acetates; acetic acid; air flow; alcohol dehydrogenase; enzyme activity; ethanol; gene expression; genes; metabolites; oxidation; relative humidity; small fruits; weight loss; wine grapes
Abstract:
... Clusters of Aleatico wine grape were picked at 18°Brix and placed at 10, 20, or 30°C, 45% relative humidity (RH) and 1.5m/s of air flow to dehydrate the berries up to 40% of loss of initial fresh weight. Sampling was done at 0%, 10%, 20%, 30%, and 40% weight loss (wl). ADH (alcohol dehydrogenase) gene expression, enzyme activity, and related metabolites were analysed. At 10°C, acetaldehyde incr ...
DOI:
10.1016/j.foodchem.2011.11.020

57. Volatile Constituents of Taxus wallichiana var mairei Leaves

Author:
Jian-chun Xie; Li-Huang Lu; Huiying Zeng; Hui-Lan Han; Bao-Guo Sun
Source:
Journal of essential oil-bearing plants 2012 v.15 no.5 pp. 724-730
ISSN:
0976-5026
Subject:
temperature; acetic acid; octenol; gas chromatography; ethyl acetate; palmitic acid; methylene chloride; acetaldehyde; formic acid; propionic acid; distillation; butanol; mass spectrometry; Taxus wallichiana var. mairei; ethanol; leaves
Abstract:
... The volatiles of Taxus wallichiana var mairei were isolated by simultaneous distillation and solvent (dichloromethane and diethyl ether) extraction with low temperature (4°C) condensation, and analyzed by GC-MS. A total of 120 identifications were achieved, representing 79.12 % of the total peak areas. The major components were 3-hexen-1-ol (8.57 %), 2-hexenal (7.24 %), 1-octen-3-ol (6.10 %), 3-oc ...
DOI:
10.1080/0972060X.2012.10644112

58. Acetaldehyde-induced cytotoxicity involves induction of spermine oxidase at the transcriptional level

Author:
Takeshi Uemura; Yuka Tanaka; Kyohei Higashi; Daisuke Miyamori; Tomokazu Takasaka; Tatsuo Nagano; Toshihiko Toida; Kanji Yoshimoto; Kazuei Igarashi; Hiroshi Ikegaya
Source:
Toxicology 2013 v.310 pp. 1-7
ISSN:
0300-483X
Subject:
acetaldehyde; acetic acid; acrolein; cytotoxicity; ethanol; hepatoma; human cell lines; liver; metabolism; ornithine decarboxylase; oxidation; small interfering RNA; spermidine; spermine; toxicology; transcription (genetics)
Abstract:
... Ethanol consumption causes serious liver injury including cirrhosis and hepatocellular carcinoma. Ethanol is metabolized mainly in the liver to acetic acid through acetaldehyde. We investigated the effect of ethanol and acetaldehyde on polyamine metabolism since polyamines are essential factors for normal cellular functions. We found that acetaldehyde induced spermine oxidase (SMO) at the transcri ...
DOI:
10.1016/j.tox.2013.05.008

59. Catalytic conversion of bio-oil to oxygen-containing fuels by simultaneous reactions with 1-butanol and 1-octene over solid acids: Model compound studies and reaction pathways

Author:
Zhi-jun Zhang; Shu-juan Sui; Shun Tan; Qing-wen Wang; Charles U. Pittman
Source:
Bioresource technology 2013 v.130 pp. 789-792
ISSN:
0960-8524
Subject:
acetaldehyde; acetic acid; alkylation; catalysts; clay; esterification; fuels; olefin; phenol; silica; sugars; sulfuric acid; temperature
Abstract:
... Upgrading bio-oil by addition reactions across olefins represents a route to refine bio-oil to combustible and stable oxygen-containing fuels. Development and application of highly active strong solid acid catalysts with good hydrothermal stability has become a key determinant for success, because bio-oil’s complexity includes large amounts of water. Temperatures of 120°C or more are needed for sa ...
DOI:
10.1016/j.biortech.2012.11.060
PubMed:
23357587

60. Cellular viability and kinetics of osmotic stress associated metabolites of Saccharomyces cerevisiae during traditional batch and fed-batch alcoholic fermentations at constant sugar concentrations

Author:
C.A. Frohman; R. Mira de Orduña
Source:
Food research international 2013 v.53 no.1 pp. 551-555
ISSN:
0963-9969
Subject:
Saccharomyces cerevisiae; acetaldehyde; acetic acid; alcoholic fermentation; batch fermentation; byproducts; ethanol; flow cytometry; glycerol; grape juice; metabolites; osmotic stress; risk; stress response; viability; yeasts
Abstract:
... In alcoholic fermentations with Saccharomyces cerevisiae, high sugar concentrations lead to an osmotic stress response that increases the formation of by-products such as acetic acid, glycerol and acetaldehyde, as well as the risk of fermentation failures. This work compared the traditional batch fermentation of a high sugar containing grape juice with a fed-batch fermentation where the same juice ...
DOI:
10.1016/j.foodres.2013.05.020

61. Comparative Volatile Profiles in Soy Sauce According to Inoculated Microorganisms

Author:
Kyung Eun LEE; Sang Mi LEE; Yong Ho CHOI; Byung Serk HURH; Young-Suk KIM
Source:
Bioscience, biotechnology, and biochemistry 2013 v.77 no.11 pp. 2192-2200
ISSN:
1347-6947
Subject:
Tetragenococcus halophilus; Zygosaccharomyces rouxii; acetaldehyde; acetates; acetic acid; alcoholic fermentation; benzaldehyde; biotechnology; butanol; formic acid; furans; lactic fermentation; phenylethyl alcohol; solid phase microextraction; solvents; soy sauce; vanillin
Abstract:
... We compared the volatile profiles in soy sauce according to inoculation with Tetragenococcus halophilus and/or Zygosaccharomyces rouxii. Totals of 107 and 81 volatiles were respectively identified by using solid-phase microextraction and solvent extraction. The various volatile compounds identified included acids, aldehydes, esters, ketones, furans and furan derivatives, and phenols. The major vol ...
DOI:
10.1271/bbb.130362

62. Evaluation of the use of bioethanol fuelled buses based on ambient air pollution screening and on-road measurements

Author:
S. López-Aparicio; C. Hak
Source:
Science of the total environment 2013 v.452-453 pp. 40-49
ISSN:
0048-9697
Subject:
acetaldehyde; acetic acid; acid value; adverse effects; air pollution; air quality; bioethanol; corrosion; formaldehyde; greenhouse gas emissions; odors; pipes; pollutants; risk reduction; screening; volatile organic compounds
Abstract:
... Mitigation measures to reduce greenhouse gas emissions may have adverse effects on urban air quality and human exposure to harmful pollutants. The use of bioethanol fuelled vehicles is increasing worldwide and may create new undesired pollution effects. Different measurement campaigns were performed in a pilot study to contribute to the understanding of the consequences associated with the use of ...
DOI:
10.1016/j.scitotenv.2013.02.046
PubMed:
23500397

63. Formation of volatile compounds in Teleme cheese manufactured with mesophilic and thermophilic dairy starters

Author:
Eleni C. Pappa; Theofilos Massouras; Kyriaki Sotirakoglou; Ioannis Kandarakis
Source:
Small ruminant research 2013 v.111 no.1-3 pp. 110-119
ISSN:
0921-4488
Subject:
acetaldehyde; acetic acid; acetoin; acetone; cheese milk; cheesemaking; cultured milk starters; dairy cows; diacetyl; esters; ethanol; fatty acids; goat cheese; goats; headspace analysis; milk; ripening; semisoft cheeses; sheep; volatile compounds
Abstract:
... Teleme cheese from sheep, goat and cow milk was produced and the effect of three different starter cultures (mesophilic, thermophilic and mixed) on the formation of volatile compounds during ripening period up to 6 months was studied. Analysis of volatile compounds was performed by an automatic balance pressure headspace apparatus coupled to a GC/MS. The volatile fraction of Teleme cheeses display ...
DOI:
10.1016/j.smallrumres.2012.10.013

64. GC-MS analysis of ethanol and other volatile compounds in micro-volume blood samples—quantifying neonatal exposure

Author:
Rebecca L. Cordell; Hitesh Pandya; Marie Hubbard; Mark A. Turner; Paul S. Monks
Source:
Analytical and bioanalytical chemistry 2013 v.405 no.12 pp. 4139-4147
ISSN:
1618-2642
Subject:
1-propanol; acetaldehyde; acetic acid; acetone; blood; detection limit; ethanol; gas chromatography-mass spectrometry; headspace analysis; methanol; neonates; patients; quantitative analysis; volatile compounds
Abstract:
... A static headspace gas chromatography coupled mass spectrometry (GC-MS) method was developed and fully validated for the quantitative measurement of acetaldehyde, acetone, methanol, ethanol and acetic acid in the headspace of micro-volumes of blood using n-propanol as an internal standard. The linearity of the method was established over the range 0.2–100 mg/L (R² > 0.99) and the limits of detecti ...
DOI:
10.1007/s00216-013-6809-1

65. Indigenous yeast population from Georgian aged wines produced by traditional “Kakhetian” method

Author:
Angela Capece; Gabriella Siesto; Cinzia Poeta; Rocchina Pietrafesa; Patrizia Romano
Source:
Food microbiology 2013 v.36 no.2 pp. 447-455
ISSN:
0740-0020
Subject:
European Union; Saccharomyces cerevisiae; acetaldehyde; acetic acid; acetoin; biotypes; fermentation; flor yeasts; flora; internal transcribed spacers; maceration; screening; wines
Abstract:
... The yeast microbiota present in wines produced by the ancient “Kakhetian” method in Georgia (EU) was studied. This technique involves the use of terracotta vessels (amphoras), during spontaneous fermentation, maceration phase and wine ageing. The analysed yeasts were collected from wines after maturation for one year in ten amphoras from a Georgian winery. The 260 isolates were all identified as S ...
DOI:
10.1016/j.fm.2013.07.008
PubMed:
24010628

66. Influence of flood-stress on ambrosia beetle host-selection and implications for their management in a changing climate

Author:
Christopher M. Ranger; Michael E. Reding; Peter B. Schultz; Jason B. Oliver
Source:
Agricultural and forest entomology 2013 v.15 no.1 pp. 56-64
ISSN:
1461-9555
Subject:
Cornus florida; Xylosandrus; acetaldehyde; acetic acid; ambrosia beetles; bark; climate change; core samplers; ethanol; flooded conditions; host plants; host preferences; host seeking; insect attractants; insect behavior; insect control; insect pests; nursery crops; ornamental trees; plant pests; plant stress; plant-insect relations; semiochemicals; spectroscopy; volatile compounds; water stress
Abstract:
... Xylosandrus germanus (Blandford) is a key pest of ornamental nursery trees. Ethanol is the most attractive semiochemical known for X. germanus and other ambrosia beetles, and its emission from trees represents an important host-selection cue. The production and emission of ethanol can be induced by a variety of abiotic and biotic stressors, which could thereby predispose trees to attack by ethanol ...
Handle:
10113/56262
DOI:
10.1111/j.1461-9563.2012.00591.x

67. Influence of oxygen and pH on the selective oxidation of ethanol on Pd catalysts

Author:
David D. Hibbitts; Matthew Neurock
Source:
Journal of catalysis 2013 v.299 no. pp. 261-271
ISSN:
0021-9517
Subject:
acetaldehyde; acetic acid; catalysts; electrons; ethanol; hydrides; hydrogen; oxidation; oxygen; pH; protons
Abstract:
... The selective oxidation of ethanol on supported Pd is catalytically promoted by the presence of hydroxide species on the Pd surface as well as in solution. These hydroxide intermediates act as Brønsted bases which readily abstract protons from the hydroxyl groups of adsorbed or solution-phase alcohols. The C₁H bond of the resulting alkoxide is subsequently activated on the metal surface via hydrid ...
DOI:
10.1016/j.jcat.2012.11.016

68. Oxidation of Ethanol Vapors in Negative Atmospheric Corona Discharge

Author:
Lyulyukin Mikhail N.; Besov Alexey S.; Vorontsov Alexander V.
Source:
Industrial & Engineering Chemistry Research 2013 v.52 no.17 pp. 5842-5848
ISSN:
1520-5045
Subject:
acetaldehyde; acetic acid; acetone; carbon dioxide; electrodes; energy costs; ethanol; formaldehyde; geometry; hydroxyl radicals; oxidation; oxygen; ozone; vapors
Abstract:
... Ethanol vapors were oxidized in negative atmospheric corona discharge of double wires-to-planes geometry using three diameters of coronating wires and three power levels. Acetaldehyde, formaldehyde, CH₃COOH, and CO were detected as intermediate gaseous products of oxidation, and CO₂ was the final product. Comparison was made with the results of the previous work on oxidation of acetone. The lowest ...
DOI:
10.1021/ie400476p

69. Relating sensory and chemical properties of sour cream to consumer acceptance

Author:
L. Shepard; R.E. Miracle; P. Leksrisompong; M.A. Drake
Source:
Journal of dairy science 2013 v.96 no.9 pp. 5435-5454
ISSN:
0022-0302
Subject:
acetaldehyde; acetic acid; adhesion; astringency; butyric acid; cardboard; citric acid; color; colorimetry; consumer acceptance; consumer preferences; gas chromatography; high performance liquid chromatography; lactic acid; mass spectrometry; milk fat; odors; opacity; potatoes; sensory evaluation; sour cream; taste; texture; titratable acidity; volatile organic compounds
Abstract:
... Sour cream is a widely popular acidified dairy product. Volatile compounds and organic acids and their specific contributions to flavor or acceptance have not been established, nor has a comprehensive study been conducted to characterize drivers of liking for sour cream. The objective of this study was to characterize chemical and sensory properties of sour cream and to determine the drivers of li ...
DOI:
10.3168/jds.2012-6317
PubMed:
23849637

70. Selected Ion Flow Tube Mass Spectrometry Analysis of Volatile Metabolites in Urine Headspace for the Profiling of Gastro-Esophageal Cancer

Author:
Huang Juzheng; Kumar Sacheen; Abbassi-Ghadi Nima; Španěl Patrik; Smith David; Hanna George B.
Source:
Analytical chemistry 2013 v.85 no.6 pp. 3409-3416
ISSN:
1520-6882
Subject:
1-propanol; acetaldehyde; acetic acid; acetone; ethanol; gastrointestinal system; headspace analysis; hexanoic acid; hydrogen sulfide; mass spectrometry; metabolites; methanol; neoplasms; patients; phenol; risk; screening; urine; vapors; volatile organic compounds
Abstract:
... Urine is considered an ideal biofluid for clinical investigation because it is obtained noninvasively and relatively large volumes are easily acquired. In this study, selected ion flow tube mass spectrometry (SIFT-MS) has been applied for the quantification of volatile organic compounds (VOCs) in the headspace vapor of urine samples, which were retrieved from three groups of patients with gastro-e ...
DOI:
10.1021/ac4000656

71. Short communication: Effects of different whey concentrations on physicochemical characteristics and viable counts of starter bacteria in dairy beverage supplemented with probiotics

Author:
W.F. Castro; A.G. Cruz; D. Rodrigues; G. Ghiselli; C.A.F. Oliveira; J.A.F. Faria; H.T. Godoy
Source:
Journal of dairy science 2013 v.96 no.1 pp. 96-100
ISSN:
0022-0302
Subject:
Bifidobacterium animalis; Lactobacillus acidophilus; acetaldehyde; acetic acid; bacteria; beverages; cultured milk starters; diacetyl; ethanol; fermented milk; food matrix; glucose; lactic acid; lactose; pH; probiotics; proteolysis; whey
Abstract:
... Fermented dairy beverages supplemented with the probiotics Lactobacillus acidophilus and Bifidobacterium lactis containing different concentrations of whey in their formulas (0, 20, 35, 50, 65, and 80%, vol/vol) were processed and checked for pH; proteolysis; levels of glucose, lactose, ethanol, acetic acid, lactic acid, diacetyl, and acetaldehyde; and lactic bacteria and probiotic counts. The res ...
DOI:
10.3168/jds.2012-5576
PubMed:
23182354

72. Stability of probiotic yogurt added with glucose oxidase in plastic materials with different permeability oxygen rates during the refrigerated storage

Author:
A.G. Cruz; W.F. Castro; J.A.F. Faria; H.M.A. Bolini; R.M.S. Celeghini; R.S.L. Raices; C.A.F. Oliveira; M.Q. Freitas; C.A. Conte Júnior; E.T. Mársico
Source:
Food research international 2013 v.51 no.2 pp. 723-728
ISSN:
0963-9969
Subject:
Bifidobacterium longum; Lactobacillus acidophilus; acetaldehyde; acetic acid; bacteria; cold storage; containers; diacetyl; dissolved oxygen; glucose oxidase; odor compounds; oxidative stress; oxygen; packaging; permeability; plastics; probiotics; proteolysis; yogurt
Abstract:
... The stability of probiotic yogurts added with glucose oxidase and packaged in different plastic packaging systems that present different oxygen permeability transfer rates (0.09, 0.2, 0.39 and 0.75mLO2/day) was evaluated during 28days of refrigerated storage. Probiotic stirred yogurts were submitted to physicochemical (pH, proteolytic activity, dissolved oxygen) and microbiological analyses (yogur ...
DOI:
10.1016/j.foodres.2013.01.028

73. TG–FTIR and Py–GC/MS analysis on pyrolysis and combustion of pine sawdust

Author:
Ningbo Gao; Aimin Li; Cui Quan; Lin Du; Yue Duan
Source:
Journal of analytical and applied pyrolysis 2013 v.100 no. pp. 26-32
ISSN:
0165-2370
Subject:
Fourier transform infrared spectroscopy; acetaldehyde; acetic acid; acetic anhydride; activation energy; carbon dioxide; carbon monoxide; chromatography; combustion; gases; mass spectrometry; methane; phenol; pyrolysis; sawdust; temperature; thermogravimetry; water; weight loss
Abstract:
... Pyrolysis and combustion of pine sawdust have been investigated by using thermogravimetric analyzer coupled with Fourier transform infrared spectrometry (TG–FTIR) analysis in this paper. Pyrolysis–gas chromatography and mass spectrometry (Py–GC/MS) analysis was employed to characterize subsequently the structure and composition of evolving gas in pine sawdust pyrolysis process. TG results showed t ...
DOI:
10.1016/j.jaap.2012.11.009

74. Volatile organic compound emissions from elephant grass and bamboo cultivars used as potential bioethanol crop

Author:
E. Crespo; M. Graus; J.B. Gilman; B.M. Lerner; R. Fall; F.J.M. Harren; C. Warneke
Source:
Atmospheric environment 2013 v.65 pp. 61-68
ISSN:
1352-2310
Subject:
acetone; air quality; acetic acid; cultivars; grasses; harvesting; isoprene; methanol; atmospheric chemistry; bioethanol; Miscanthus; Phyllostachys; acetaldehyde; volatile organic compounds; Cenchrus purpureus; woody plants; emissions; bamboos; gas chromatography-mass spectrometry
Abstract:
... Volatile organic compound (VOC) emissions from elephant grass (Miscanthus gigantus) and black bamboo (Phyllostachys nigra) were measured online in semi-field chamber and plant enclosure experiments during growth and harvest using proton-transfer reaction mass spectrometry (PTR-MS), proton-transfer reaction ion-trap mass spectrometry (PIT-MS) and gas chromatography-mass spectrometry (GC–MS). Both c ...
DOI:
10.1016/j.atmosenv.2012.10.009

75. The impact of volatile compounds released by paper on cellulose degradation in ambient hygrothermal conditions

Author:
J. Tétreault; A.-L. Dupont; P. Bégin; S. Paris
Source:
Polymer degradation and stability 2013 v.98 no.9 pp. 1827-1837
ISSN:
0141-3910
Subject:
acetaldehyde; acetic acid; cellulose; formaldehyde; formic acid; furfural; hydrogen peroxide; magnesium; nitrates; nitrogen oxides; pH; paper; polymerization; relative humidity; vapors; volatile organic compounds
Abstract:
... The reactivity towards cellulose of various volatile compounds commonly released by paper was studied. Sheets of Whatman No. 1 (W1) and No. 40 (W40) were exposed to various concentrations of these compounds in vapour phase ranging from 20 to 80 ppm in closed vessels for 52 days in controlled ambient conditions, after which they were hygrothermally aged. The measured properties of the paper were co ...
DOI:
10.1016/j.polymdegradstab.2013.05.017

76. A single catalyst of aqueous CoIII for deodorization of mixture odor gases: A development and reaction pathway study at electro-scrubbing process

Author:
Muthuraman Govindan; Il-Shik Moon
Source:
Journal of hazardous materials 2013 v.260 pp. 1064-1072
ISSN:
0304-3894
Subject:
Fourier transform infrared spectroscopy; acetaldehyde; acetic acid; acidity; ammonia; carbon dioxide; catalysts; deodorization; electrochemistry; gas emissions; gases; hydrogen sulfide; methanethiol; odors; oxidation; pH; sulfur; sulfuric acid; trimethylamine; waste treatment
Abstract:
... A constant generation of aqueous CoIII active catalyst and its utility on various odor gases deodorization at electro-scrubbing process is the primary investigation. The CoIII activation and regeneration for continuous use is established by electrochemical undivided cell in H2SO4 medium. The generated aqueous CoIII is then applied to simultaneous deodorization of simulated odor gases, namely, ammo ...
DOI:
10.1016/j.jhazmat.2013.06.055

77. Conversion of biomass-derived small oxygenates over HZSM-5 and its deactivation mechanism

Author:
Karthikeyan K. Ramasamy; Mark A. Gerber; Matthew Flake; He Zhang; Yong Wang
Source:
Green chemistry 2014 v.16 no.2 pp. 748-760
ISSN:
1463-9270
Subject:
acetaldehyde; acetic acid; active sites; adsorption; aromatic compounds; catalysts; ethanol; ethyl acetate; green chemistry; liquids; moieties; molecular weight
Abstract:
... HZSM-5 catalyst deactivation was studied using aqueous feed mixtures containing ethanol, ethanol + acetic acid, ethanol + ethyl acetate, or ethanol + acetaldehyde in a fixed bed reactor at 360 °C and 300 psig. Compared to an ethanol alone experiment, addition of other oxygenates reduced catalyst life in the order of: ethyl acetate < acetic acid < acetaldehyde. Based on the liquid product and spent ...
DOI:
10.1039/c3gc41369a

78. Degradation of 1,4-dioxane in water with heat- and Fe2+-activated persulfate oxidation

Author:
Long Zhao; Hong Hou; Ayuko Fujii; Masaaki Hosomi; Fasheng Li
Source:
Environmental science and pollution research international 2014 v.21 no.12 pp. 7457-7465
ISSN:
0944-1344
Subject:
acetaldehyde; acetic acid; byproducts; carbon; carbon dioxide; glycolic acid; hydrogen; iron; models; oxidation; pH; temperature
Abstract:
... This research investigated the 1,4-dioxane (1,4-D) degradation efficiency and rate during persulfate oxidation at different temperatures, with and without Fe²⁺addition, also considering the effect of pH and persulfate concentration on the oxidation of 1,4-D. Degradation pathways for 1,4-D have also been proposed based on the decomposition intermediates and by-products. The results indicate that 1, ...
DOI:
10.1007/s11356-014-2668-3

79. Determination of volatile compounds in turbot (Psetta maxima) during refrigerated storage by headspace solid‐phase microextraction and gas chromatography–mass spectrometry

Author:
Yongxia Xu; Ying Liu; Chengcheng Jiang; Chaomin Zhang; Xuepeng Li; Danshi Zhu; Jianrong Li
Source:
Journal of the science of food and agriculture 2014 v.94 no.12 pp. 2464-2471
ISSN:
0022-5142
Subject:
freshness; Scophthalmus maximus; mass spectrometry; benzene; alcohols; headspace analysis; turbot; acetaldehyde; esters; microextraction; volatile compounds; spoilage; principal component analysis; storage time; acetic acid; alkanes; trimethylamine; gas chromatography; ketones; cold storage; alkenes
Abstract:
... BACKGROUND: A procedure based on headspace solid phase microextraction (HS‐SPME) and gas chromatography–mass spectrometry (GC‐MS) was developed for the study of the volatile profile characteristics of turbot during refrigerated storage at 4°C for 20 days in order to find possible markers of freshness or spoilage. RESULTS: A total of 61 volatile compounds including aldehydes, ketones, esters, alcoh ...
DOI:
10.1002/jsfa.6581
PubMed:
25165779

80. Enzymes involved in vinyl acetate decomposition by Pseudomonas fluorescens PCM 2123 strain

Author:
Elżbieta Szczyrba; Izabela Greń; Grażyna Bartelmus
Source:
Folia microbiologica 2014 v.59 no.2 pp. 99-105
ISSN:
0015-5632
Subject:
EDTA (chelating agent); Pseudomonas fluorescens; acetaldehyde; acetates; acetic acid; alcohol dehydrogenase; aldehyde dehydrogenase; beta-mercaptoethanol; dithiothreitol; esterases; food industry; hydrolysis; metabolites; metal ions; pH; pollution; toxicity; volatile organic compounds
Abstract:
... Esterases are widely used in food processing industry, but there is little information concerning enzymes involved in decompositions of esters contributing to pollution of environment. Vinyl acetate (an ester of vinyl alcohol and acetic acid) is a representative of volatile organic compounds (VOCs) in decomposition, of which hydrolyses and oxidoreductases are mainly involved. Their activities unde ...
DOI:
10.1007/s12223-013-0268-0
PubMed:
23913099
PubMed Central:
PMC3936133

81. Indigenous Saccharomyces cerevisiae yeasts as a source of biodiversity for the selection of starters for specific fermentations

Author:
Capece Angela; Romaniello Rossana; Pietrafesa Rocchina; Romano Patrizia
Source:
BIO web of conferences 2014 v.3 pp. 02003
ISSN:
2117-4458
Subject:
Saccharomyces cerevisiae; acetaldehyde; acetic acid; alcoholic fermentation; copper; ethanol; ethyl acetate; genetic variation; hydrogen sulfide; odor compounds; starter cultures; sulfur dioxide; wine grapes; wine quality; wine yeasts; wines
Abstract:
... The long-time studies on wine yeasts have determined a wide diffusion of inoculated fermentations by commercial starters, mainly of Saccharomyces. Although the use of starter cultures has improved the reproducibility of wine quality, the main drawback to this practice is the lack of the typical traits of wines produced by spontaneous fermentation. These findings have stimulated wine-researchers an ...
DOI:
10.1051/bioconf/20140302003

82. Proton Transfer Reaction Time-of-Flight Mass Spectrometric (PTR-TOF-MS) determination of volatile organic compounds (VOCs) emitted from a biomass fire developed under stable nocturnal conditions

Author:
Federico Brilli; Beniamino Gioli; Paolo Ciccioli; Donatella Zona; Francesco Loreto; Ivan A. Janssens; Reinhart Ceulemans
Source:
Atmospheric environment 2014 v.97 pp. 54-67
ISSN:
1352-2310
Subject:
acetaldehyde; acetic acid; acetone; atmospheric chemistry; barns; biomass; burning; carbon dioxide; carbon monoxide; combustion; emissions; emissions factor; fuels; gases; hay; ions; mass spectrometry; methane; methanol; mixing; spectrometers; straw; toxicity; volatile organic compounds
Abstract:
... Combustion of solid and liquid fuels is the largest source of potentially toxic volatile organic compounds (VOCs), which can strongly affect health and the physical and chemical properties of the atmosphere. Among combustion processes, biomass burning is one of the largest at global scale. We used a Proton Transfer Reaction “Time-of-Flight” Mass Spectrometer (PTR-TOF-MS), which couples high sensit ...
DOI:
10.1016/j.atmosenv.2014.08.007

83. Reaktionen von OH-Radikalen mit Acetaldehyd in wäßriger Lösung in Gegenwart von Sauerstoff / Reactions of OH-Radicals with Acetaldehyde in Oxygenated Aqueous Solution

Author:
Hartmut Schultze; Dietrich Schulte-Frohlinde
Source:
Zeitschrift für Naturforschung 2014 v.29 no.1-2 pp. 91-95
ISSN:
0932-0776
Subject:
acetaldehyde; acetic acid; aqueous solutions; free radicals; gamma radiation; half life; hydrogen; hydrogen peroxide; hydroxyl radicals; nitrous oxide; oxygen; peracetic acid; temperature
Abstract:
... γ-Irradiation of aqueous acetaldehyde in the presence of N₂O and O₂ at 0°C leads to the formation of 1.5 molecules of acetic acid per OH radical consumed. As intermediates peroxidic compounds are produced with a half life of about 50 min. H₂O₂ is not formed.The primary step of the reaction is the interaction of the OH radical with acetyldehyde yielding water and acetyl radicals which add oxygen. T ...
DOI:
10.1515/znb-1974-1-229

84. Rhodotorula glutinis as source of pigments and metabolites for food industry

Author:
Ayerim Hernández-Almanza; Julio Cesar Montanez; Miguel A. Aguilar-González; Cristian Martínez-Ávila; Raúl Rodríguez-Herrera; Cristóbal N. Aguilar
Source:
Food bioscience 2014 v.5 pp. 64-72
ISSN:
2212-4292
Subject:
Rhodotorula glutinis; acetaldehyde; acetic acid; biochemical pathways; biotechnology; carotenoids; ethanol; fermentation; food industry; metabolites; microbial physiology; pigments; yeasts
Abstract:
... Rhodotorula glutinis is a pigmented yeast, part of the Basidiomycota phylum, particularly important for food industries because its biotechnological potential and safety implications. Various strains of Rhodotorula present important features such as the production of large amounts of carotenoids, single-cell proteins from ethanol, acetic acid and acetaldehyde. This review describes and discusses t ...
DOI:
10.1016/j.fbio.2013.11.007

85. Role of Oxygen in Acetic Acid Decomposition on Pt(111)

Author:
Neitzel Armin; Lykhach Yaroslava; Johánek Viktor; Tsud Nataliya; Skála Tomáš; Prince Kevin C.; Matolín Vladimír; Libuda Jörg
Source:
The Journal of Physical Chemistry C 2014 v.118 no.26 pp. 14316-14325
ISSN:
1932-7455
Subject:
acetaldehyde; acetates; acetic acid; acetic anhydride; adsorption; carbon; carbon dioxide; chemical bonding; cleavage (chemistry); desorption; ethylene; hydrogen; methane; methanol; moieties; oxygen; reaction mechanisms; spectroscopy
Abstract:
... We have investigated the role of coadsorbed atomic oxygen during the decomposition of acetic acid on Pt(111) by means of temperature-programmed desorption (TPD) and synchrotron radiation photoelectron spectroscopy (SRPES). Reaction mechanisms have been established through identification of desorbing products and surface species formed during decomposition of acetic acid, both on Pt(111) and oxygen ...
DOI:
10.1021/jp502017t

86. Simultaneous leaf- and ecosystem-level fluxes of volatile organic compounds from a poplar-based SRC plantation

Author:
Federico Brilli; Beniamino Gioli; Donatella Zona; Emanuele Pallozzi; Terenzio Zenone; Gerardo Fratini; Carlo Calfapietra; Francesco Loreto; Ivan A. Janssens; Reinhart Ceulemans
Source:
Agricultural and forest meteorology 2014 v.187 pp. 22-35
ISSN:
0168-1923
Subject:
eddy covariance; trapping; reactive oxygen species; light intensity; volatile organic compounds; carbon; vapor pressure; mass spectrometry; biogeochemical cycles; adults; acetone; carbon dioxide; acetaldehyde; air; genotype; oxidation; ecosystems; leaves; ozone; temperature; acetic acid; methanol; monoterpenoids; environmental factors; gas chromatography; formaldehyde
Abstract:
... Emission of carbon from ecosystems in the form of volatile organic compounds (VOC) represents a minor component flux in the global carbon cycle that has a large impact on ground-level ozone, particle and aerosol formation and thus on air chemistry and quality. This study reports exchanges of CO2 and VOC between a poplar-based short rotation coppice (SRC) plantation and the atmosphere, measured sim ...
DOI:
10.1016/j.agrformet.2013.11.006

87. Upgrading Bio-oil: Simultaneous Catalytic Esterification of Acetic Acid and Alkylation of Acetaldehyde

Author:
Ye Jun; Liu Chunjian; Fu Yan; Peng Shuai; Chang Jie
Source:
Energy & Fuels 2014 v.28 no.7 pp. 4267-4272
ISSN:
1520-5029
Subject:
acetaldehyde; acetates; acetic acid; alkylation; biofuels; catalysts; esterification; silica; sulfuric acid; temperature; water content
Abstract:
... This paper reports a simultaneous catalytic esterification of acetic acid and alkylation of acetaldehyde using a silica sulfuric acid catalyst from 40 to 140 °C. The results show that the esterification of acetic acid and acetalization of acetaldehyde with 1-butanol took place simultaneously, and both reactions were strongly affected by the temperature and catalyst dosage. The esterification of ac ...
DOI:
10.1021/ef500129x

88. Variations in Main Flavor Compounds of Freshly Distilled Brandy during the Second Distillation

Author:
Yuping Zhao; Tiantian Tian; Jiming Li; Baochun Zhang; Ying Yu; Yangyang Wang; Hao Niu
Source:
International journal of food engineering 2014 v.10 no.4 pp. 809-820
ISSN:
1556-3758
Subject:
acetaldehyde; acetic acid; benzene derivatives; brandy; distillation; esters; flavor compounds; furfural; gas chromatography-mass spectrometry; hexanoic acid; ingredients; ketones; linalool; monitoring; phenylethyl alcohol; solid phase microextraction; succinic acid; volatile compounds
Abstract:
... The present study investigated the variations in main flavor compounds of a Chinese brandy during the second distillation process using headspace–solid-phase microextraction coupled with gas chromatography-mass spectrometry. A total of 97 volatile compounds involving esters, alcohols, aldehydes, ketones, furans, benzene derivatives and terpenes were quantified, and 28 components were identified as ...
DOI:
10.1515/ijfe-2014-0123

89. Volatile organic compounds in watermelon (Citrullus lanatus) grafted onto 21 local and two commercial bottle gourd (Lagenaria siceraria) rootstocks

Author:
Zehra Guler; Elif Candir; Halit Yetisir; Fatih Karaca; Ilknur Solmaz
Source:
Journal of horticultural science & biotechnology 2014 v.89 no.4 pp. 448-452
ISSN:
2380-4084
Subject:
Citrullus lanatus; Lagenaria siceraria; acetaldehyde; acetic acid; breeding; cultivars; disease resistance; ethanol; flavor; fruit quality; fruit yield; gas chromatography; genotype; gourds; headspace analysis; ketones; mass spectrometry; pentanols; rootstocks; scions; volatile organic compounds; watermelons; Mediterranean region; Turkey (country)
Abstract:
... Volatile organic compounds (VOCs) are responsible for flavour development in watermelon (Citrullus lanatus). The objective of this study was to investigate the rootstock effects of 21 local bottle gourd [Lagenaria siceraria (Molina) Standl.] accessions collected from the Mediterranean region (Turkey) on the concentrations of VOCs in watermelon over 2 years. The watermelon cultivar ‘Crimson Tide’ w ...
DOI:
10.1080/14620316.2014.11513105

90. Acetaldehyde as Key Compound for the Authenticity of Sherry Wines: A Study Covering 5 Decades

Author:
Luis Zea; María P. Serratosa; Julieta Mérida; Lourdes Moyano
Source:
Comprehensive reviews in food science and food safety 2015 v.14 no.6 pp. 681-693
ISSN:
1541-4337
Subject:
acetaldehyde; acetic acid; acetoin; acetyl coenzyme A; aldehyde dehydrogenase; amino acids; apples; ethanol; flor yeasts; metabolism; mitochondrial DNA; odors; oxygen; phenols; sherry; wine aging; Spain
Abstract:
... Sherry wines are consumed worldwide and are principally produced in the Jerez and Montilla‐Moriles regions of southern Spain. Acetaldehyde is a relevant carbonyl compound in wines and one of the main responsible for the particular personality of Sherry wines with a ripe apple odor descriptor. Aldehyde dehydrogenase plays an important role in yeast acetaldehyde metabolism. Acetaldehyde contents in ...
DOI:
10.1111/1541-4337.12159

91. Catalytic liquid-phase oxidation of acetaldehyde to acetic acid over a Pt/CeO2–ZrO2–SnO2/γ-alumina catalyst

Author:
Pil-Gyu Choi; Takanobu Ohno; Toshiyuki Masui; Nobuhito Imanaka
Source:
Journal of Environmental Sciences 2015 v.36 pp. 63-66
ISSN:
1001-0742
Subject:
acetaldehyde; acetic acid; catalysts; coprecipitation; oxidation; platinum
Abstract:
... Pt/CeO2–ZrO2–SnO2/γ-Al2O3 catalysts were prepared by co-precipitation and wet impregnation methods for catalytic oxidation of acetaldehyde to acetic acid in water. In the present catalysts, Pt and CeO2–ZrO2–SnO2 were successfully dispersed on the γ-Al2O3 support. Dependences of platinum content and reaction time on the selective oxidation of acetaldehyde to acetic acid were investigated to optimiz ...
DOI:
10.1016/j.jes.2015.04.017

92. Characterization of volatile aroma compounds in different brewing barley cultivars

Author:
Liang Dong; Yingmin Hou; Feng Li; Yongzhe Piao; Xiao Zhang; Xiaoyu Zhang; Cheng Li; Changxin Zhao
Source:
Journal of the science of food and agriculture 2015 v.95 no.5 pp. 915-921
ISSN:
0022-5142
Subject:
2-heptanone; acetaldehyde; acetic acid; alcohols; aromatic compounds; barley; beers; brewing; cultivars; ethyl acetate; fermentation; flavor; flavor compounds; furans; gas chromatography; hops; malt; malting barley; mass spectrometry; odor compounds; odors; principal component analysis; quantitative analysis; solid phase microextraction; solvents
Abstract:
... BACKGROUND: Beer is a popular alcoholic malt beverage resulting from fermentation of the aqueous extract of malted barley with hops. The aroma of brewing barley impacts the flavor of beer indirectly, because some flavor compounds or their precursors in beer come from the barley. The objectives of this research were to study volatile profiles and to characterize odor‐active compounds of brewing bar ...
DOI:
10.1002/jsfa.6759

93. Methane Activation on Zn2+-Exchanged ZSM-5 Zeolites. The Effect of Molecular Oxygen Addition

Author:
Gabrienko Anton A.; Arzumanov Sergei S.; Luzgin Mikhail V.; Stepanov Alexander G.; Parmon Valentin N.
Source:
The Journal of Physical Chemistry C 2015 v.119 no.44 pp. 24910-24918
ISSN:
1932-7455
Subject:
Bronsted acids; acetaldehyde; acetic acid; ambient temperature; carbon; cations; formates; methane; nuclear magnetic resonance spectroscopy; oxidation; oxygen; physical chemistry; stable isotopes; zeolites; zinc
Abstract:
... In relation to the reported methane activation on Zn-modified zeolite ZSM-5 at room temperature to afford the surface methoxy species by Xu et al. (Chem. Sci. 2012, 3, 2932), the activation of methane on Zn²⁺-exchanged H-ZSM-5 zeolite in the absence and the presence of molecular oxygen has been studied with ¹³C magic angle spinning (MAS) NMR spectroscopy. It has been established that the methane a ...
DOI:
10.1021/acs.jpcc.5b08759

94. Potential of non-thermal plasmas for helping the biodegradation of volatile organic compounds (VOCs) released by waste management plants

Author:
Marco Schiavon; Marco Scapinello; Paolo Tosi; Marco Ragazzi; Vincenzo Torretta; Elena Cristina Rada
Source:
Journal of cleaner production 2015 v.104 pp. 211-219
ISSN:
0959-6526
Subject:
specific energy; acclimation; biofilters; volatile organic compounds; toluene; benzene; waste management; air flow; carbon dioxide; pollution control; industry; acetaldehyde; air; ethyl acetate; effluents; water solubility; energy; byproducts; octane; emissions; ethanol; acetic acid; biodegradation; biofiltration; air pollution; bacteria
Abstract:
... This paper investigates the feasibility of exploiting a non-thermal plasma (NTP) to treat the gaseous effluents released by the mechanical-biological treatments (MBTs) of waste and overcome the typical disadvantages of biofilters, whose removal efficiency is limited during acclimatization of bacteria, peaks of pollutant concentration or unstable airflow rates. A dielectric barrier discharge was ap ...
DOI:
10.1016/j.jclepro.2015.05.034

95. Preliminary studies on the treatment of wastewater from biomass gasification

Author:
Roksana Muzyka; Maciej Chrubasik; Sławomir Stelmach; Marcin Sajdak
Source:
Waste management 2015 v.44 pp. 135-146
ISSN:
0956-053X
Subject:
acetaldehyde; acetic acid; acetone; aqueous solutions; biomass; cleaning; ferric hydroxide; furfuryl alcohol; gasification; methanol; oils; phenol; purification methods; scrubbers; wastewater treatment
Abstract:
... This paper presents completed research on the purification of undiluted raw water and organic condensates obtained in biomass thermal conversion processes such as gasification, which are rarely addressed in published studies. However, similar studies involving the characterization and purification of aqueous solutions obtained from process gas treatment after the gasification of biomass are availa ...
DOI:
10.1016/j.wasman.2015.07.002

96. Primary emissions and secondary organic aerosol formation from the exhaust of a flex-fuel (ethanol) vehicle

Author:
R. Suarez-Bertoa; A.A. Zardini; S.M. Platt; S. Hellebust; S.M. Pieber; I. El Haddad; B. Temime-Roussel; U. Baltensperger; N. Marchand; A.S.H. Prévôt; C. Astorga
Source:
Atmospheric environment 2015 v.117 pp. 200-211
ISSN:
1352-2310
Subject:
acetaldehyde; acetic acid; aerosols; air quality; aromatic compounds; atmospheric chemistry; biofuels; carbon; emissions; ethanol; gasoline; ions; oxidation; ozone; temperature; volatile organic compounds; Italy
Abstract:
... Incentives to use biofuels may result in increasing vehicular emissions of compounds detrimental to air quality. Therefore, regulated and unregulated emissions from a Euro 5a flex-fuel vehicle, tested using E85 and E75 blends (gasoline containing 85% and 75% of ethanol (vol/vol), respectively), were investigated at 22 and −7 °C over the New European Driving Cycle, at the Vehicle Emission Laborator ...
DOI:
10.1016/j.atmosenv.2015.07.006

97. Proteins involved in wine aroma compounds metabolism by a Saccharomyces cerevisiae flor-velum yeast strain grown in two conditions

Author:
Jaime Moreno-García; Teresa García-Martínez; M. Carmen Millán; Juan Carlos Mauricio; Juan Moreno
Source:
Food microbiology 2015 v.51 pp. 1-9
ISSN:
0740-0020
Subject:
Saccharomyces cerevisiae; acetaldehyde; acetates; acetic acid; acetoin; benzaldehyde; biofilm; carbon; decanoic acid; ethanol; glucose; glycerol; metabolism; metabolites; odor compounds; odors; proteins; proteome; proteomics; wines; yeasts
Abstract:
... A proteomic and exometabolomic study was conducted on Saccharomyces cerevisiae flor yeast strain growing under biofilm formation condition (BFC) with ethanol and glycerol as carbon sources and results were compared with those obtained under no biofilm formation condition (NBFC) containing glucose as carbon source. By using modern techniques, OFFGEL fractionator and LTQ-Orbitrap for proteome and SB ...
DOI:
10.1016/j.fm.2015.04.005

98. Quality parameters of probiotic yogurt added to glucose oxidase compared to commercial products through microbiological, physical–chemical and metabolic activity analyses

Author:
Aline L.D. Batista; Ramon Silva; Leandro P. Cappato; Caroline N. Almada; Rita K.A. Garcia; Marcia C. Silva; Renata S.L. Raices; Daniel B. Arellano; Anderson S. Sant'Ana; Carlos A. Conte Junior; Monica Q. Freitas; Adriano G. Cruz
Source:
Food research international 2015 v.77 pp. 627-635
ISSN:
0963-9969
Subject:
acetaldehyde; acetic acid; conjugated linoleic acid; dairy farming; diacetyl; fatty acid composition; flavor; functional foods; glucose oxidase; lactic acid; markets; minerals; odor compounds; pH; polyunsaturated fatty acids; probiotics; proteolysis; viability; yogurt
Abstract:
... The performance of probiotic yogurt with the addition of glucose oxidase (250 and 500ppm, GOX1 and GOX2, respectively) compared to commercial products available in the Brazilian market was investigated. Microbiological (probiotic bacteria count), physical–chemical (pH, proteolysis, minerals) and metabolic activities (production of organic acids, flavor and aroma compounds and fatty acid profile) w ...
DOI:
10.1016/j.foodres.2015.08.017

99. Rapid removal and decomposition of gaseous acetaldehyde by the thermo- and photo-catalysis of gold nanoparticle-loaded anatase titanium(IV) oxide

Author:
Tomoyuki Nikawa; Shin-ichi Naya; Hiroaki Tada
Source:
Journal of colloid and interface science 2015 v.456 pp. 161-165
ISSN:
0021-9797
Subject:
acetaldehyde; acetates; acetic acid; adsorption; carbon dioxide; catalysts; gold; irradiation; moieties; nanogold; oxidation; particle size; photocatalysis; surface area; titanium; titanium dioxide; ultraviolet radiation
Abstract:
... Gold nanoparticles (NPs) with a mean particle size ranging from 2.1 to 7.4nm were loaded on anatase TiO2 particles (Au/TiO2) by the heating temperature-varied deposition precipitation technique. This study has shown that Au/TiO2 with Au particle size <3nm and TiO2 surface area >50m²g⁻¹ can be a promising environmental catalyst for the rapid removal and decomposition of gaseous acetaldehyde in a cl ...
DOI:
10.1016/j.jcis.2015.06.016

100. Rapid removal and subsequent low-temperature mineralization of gaseous acetaldehyde by the dual thermocatalysis of gold nanoparticle-loaded titanium(IV) oxide

Author:
Tomoyuki Nikawa; Shin-ichi Naya; Takayoshi Kimura; Hiroaki Tada
Source:
Journal of catalysis 2015 v.326 pp. 9-14
ISSN:
0021-9517
Subject:
Lewis acids; acetaldehyde; acetates; acetic acid; active sites; adsorption; ambient temperature; carbon dioxide; gold; mineralization; nanogold; oxidation; surface area; titanium; titanium dioxide
Abstract:
... Under ambient humid conditions, the adsorption of acetaldehyde on unmodified TiO2 is small and weak. In contrast, loading Au particles smaller than 3nm on TiO2 with surface area larger than 17.5m²g⁻¹ (Au/TiO2) causes the rapid and strong adsorption of gaseous acetaldehyde from a closed space. This striking adsorption phenomenon initiates from the aerobic oxidation of acetaldehyde to acetic acid by ...
DOI:
10.1016/j.jcat.2015.03.005