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Acta Physiologica Scandinavica Dec 1964
Topics: Acetates; Acetic Acid; Cats; Chlorides; Gastric Juice; Hydrochloric Acid; Permeability; Pharmacology; Research; Stomach
PubMed: 14252576
DOI: 10.1111/j.1748-1716.1964.tb10439.x -
The Journal of Chemical Physics Nov 2009Infrared (IR) spectroscopy based on vacuum-ultraviolet one-photon ionization detection was carried out to investigate geometric structures of neutral and cationic...
Infrared (IR) spectroscopy based on vacuum-ultraviolet one-photon ionization detection was carried out to investigate geometric structures of neutral and cationic clusters of acetic acid: (CH(3)COOH)(2), CH(3)COOH-CH(3)OH, and CH(3)COOH-H(2)O. All the neutral clusters have cyclic-type intermolecular structures, in which acetic acid and solvent molecules act as both hydrogen donors and acceptors, and two hydrogen-bonds are formed. On the other hand, (CH(3)COOH)(2) (+) and (CH(3)COOH-CH(3)OH)(+) form proton-transferred structures, where the acetic acid moiety donates the proton to the counter molecule. (CH(3)COOH-H(2)O)(+) has a non-proton-transferred structure, where CH(3)COOH(+) and H(2)O are hydrogen-bonded. The origin of these structural differences among the cluster cations is discussed with the relative sizes of the proton affinities of the cluster components and the potential energy curves along the proton-transfer coordinate.
Topics: Acetic Acid; Hydrogen Bonding; Ions; Molecular Structure; Photochemical Processes; Protons; Spectroscopy, Fourier Transform Infrared; Ultraviolet Rays; Vacuum
PubMed: 19916601
DOI: 10.1063/1.3257686 -
Nature Mar 1953
Topics: Acetates; Acetic Acid; Humans; Poaceae
PubMed: 13046524
DOI: 10.1038/171478a0 -
Maryland State Medical Journal Apr 1956
Topics: Acetates; Acetic Acid; Humans; Skin Diseases, Infectious; Ulcer
PubMed: 13308418
DOI: No ID Found -
Molecules (Basel, Switzerland) May 2024Acetic acid bacteria (AAB) and other members of the complex microbiotas, whose activity is essential for vinegar production, display biodiversity and richness that is...
Acetic acid bacteria (AAB) and other members of the complex microbiotas, whose activity is essential for vinegar production, display biodiversity and richness that is difficult to study in depth due to their highly selective culture conditions. In recent years, liquid chromatography coupled with tandem mass spectrometry (LC-MS/MS) has emerged as a powerful tool for rapidly identifying thousands of proteins present in microbial communities, offering broader precision and coverage. In this work, a novel method based on LC-MS/MS was established and developed from previous studies. This methodology was tested in three studies, enabling the characterization of three submerged acetification profiles using innovative raw materials (synthetic alcohol medium, fine wine, and craft beer) while working in a semicontinuous mode. The biodiversity of existing microorganisms was clarified, and both the predominant taxa (, , , and ) and others never detected in these media ( and , among others) were identified. The key functions and adaptive metabolic strategies were determined using comparative studies, mainly those related to cellular material biosynthesis, energy-associated pathways, and cellular detoxification processes. This study provides the groundwork for a highly reliable and reproducible method for the characterization of microbial profiles in the vinegar industry.
Topics: Tandem Mass Spectrometry; Acetic Acid; Chromatography, Liquid; Bacterial Proteins; Bacteria
PubMed: 38893424
DOI: 10.3390/molecules29112548 -
The Journal of Investigative Dermatology Dec 1950
Topics: Acetates; Acetic Acid; Eczema; Humans; Skin
PubMed: 14794991
DOI: 10.1038/jid.1950.120 -
Bioresource Technology Nov 2016In this study, palm residues were pyrolyzed in a bench-scale (3kg/h) fast pyrolysis plant equipped with a fluidized bed reactor and bio-oil separation system for the...
In this study, palm residues were pyrolyzed in a bench-scale (3kg/h) fast pyrolysis plant equipped with a fluidized bed reactor and bio-oil separation system for the production of bio-oil rich in acetic acid and phenol. Pyrolysis experiments were performed to investigate the effects of reaction temperature and the types and amounts of activated carbon on the bio-oil composition. The maximum bio-oil yield obtained was approximately 47wt% at a reaction temperature of 515°C. The main compounds produced from the bio-oils were acetic acid, hydroxyacetone, phenol, and phenolic compounds such as cresol, xylenol, and pyrocatechol. When coal-derived activated carbon was applied, the acetic acid and phenol yields in the bio-oils reached 21 and 19wt%, respectively. Finally, bio-oils rich in acetic acid and phenol could be produced separately by using an in situ bio-oil separation system and activated carbon as an additive.
Topics: Acetic Acid; Biofuels; Charcoal; Hot Temperature; Phenols
PubMed: 27501032
DOI: 10.1016/j.biortech.2016.07.107 -
The Journal of Organic Chemistry Mar 1947
Topics: Acetates; Acetic Acid; Sulfanilamide; Sulfanilamides; Sulfonamides
PubMed: 20291136
DOI: 10.1021/jo01166a011 -
Science (New York, N.Y.) Oct 1947
Topics: Acetates; Acetic Acid; Penicillins; Phenylacetates
PubMed: 17752823
DOI: 10.1126/science.106.2755.373 -
Biotechnology and Bioengineering Jun 2001Ralstonia eutropha grows on and produces polyhydroxyalkanoates (PHAs) from fermentation acids. Acetic acid, one major organic acid from acidogenesis of organic wastes,...
Ralstonia eutropha grows on and produces polyhydroxyalkanoates (PHAs) from fermentation acids. Acetic acid, one major organic acid from acidogenesis of organic wastes, has an inhibitory effect on the bacterium at slightly alkaline pH (6 g HAc/L at pH 8). The tolerance of R. eutropha to acetate, however, was increased significantly up to 15 g/L at the slightly alkaline pH level with high cell mass concentration. A metabolic cell model with five fluxes is proposed to depict the detoxification mechanism including mass transfer and acetyl-CoA formation of acetic acid and the formation of three final metabolic products, polyhydroxybutyrate (PHB), active biomass, and CO(2). The fluxes were measured under different conditions such as cell mass concentration, acetic acid concentration, and medium composition. The experimental results indicate that the acetate detoxification by high cell mass concentration is attributed to the increased fluxes at high extracellular acetate concentrations. The fluxes could be doubled to reduce and hence detoxify the accumulated intracellular acetate anions.
Topics: Acetates; Acetic Acid; Culture Media; Cupriavidus necator; Hydrogen-Ion Concentration; Inactivation, Metabolic; Industrial Microbiology
PubMed: 11344450
DOI: 10.1002/bit.1080