Search results for "ethanol"
showing 10 items of 2041 documents
CCDC 882806: Experimental Crystal Structure Determination
2013
Related Article: F.Reuter,E.Rentschler|2013|Polyhedron|52|788|doi:10.1016/j.poly.2012.07.050
CCDC 882811: Experimental Crystal Structure Determination
2013
Related Article: F.Reuter,E.Rentschler|2013|Polyhedron|52|788|doi:10.1016/j.poly.2012.07.050
Lactic Acid Bacteria in Spanish Red Rose and White Musts and Wines under Cellar Conditions
1992
The dynamics of the lactic acid bacterial (LAB) population in different cellars, fermentation conditions and musts were analyzed. The number of LAB in fresh musts diminished quickly in the first few days, but an increase of these bacteria occurred during the later stages of the alcoholic fermentation. The species found in fresh musts were Lactobacillus plantarum, L. hilgardii, L. brevis, L. confusus, and Leuc. onostoc paramesenteroides. At the end of fermentation only L. hilgardii, Leuc. oenos and L. fructivorans were isolated. The API 50 CHL system was not useful to identify strains of Leuc. oenos species. All the isolated strains degraded malic acid in synthetic medium but only two strain…
Microwave-Assisted Esterification of Tall Oil Fatty Acids with Methanol Using Lignin-Based Solid Catalyst
2016
During alkaline pulping significant amounts of lignin, carbohydrates (mostly hemicelluloses), and extractives (tall oil soap and turpentine) are removed from wood feedstock. In this study, the catalytic esterification of fatty acids in tall oil with methanol to produce fatty acid methyl esters under microwave irradiation was performed at 100 °C for 10–60 min. A novel heterogeneous acid catalyst tested for this purpose was synthesized from the hardwood alkali lignin that was precipitated by acidification from the black liquor from soda-AQ pulping. The comparative reaction data were obtained by using other solid catalysts, Amberlyst 15, and p-toluenesulfonic acid. The results showed the highe…
Solvent production from rice straw by a co-culture of Clostridium acetobutylicum and Saccharomyces cerevisiae: effect of pH control
2022
One of the challenges in biofuel production from lignocellulosic wastes is to improve its conversion to solvents; therefore, new strategies to enhance xylose uptake are required due to be the secondary abundant sugar. In this context, a novel fermentation strategy integrating a co-culture of Clostridium acetobutylicum and Saccharomyces cerevisiae with pH control was developed. Initially, two different buffers, ammonium acetate and calcium carbonate, were tested under pHmin > 4.8 by fermenting 60 g L−1 of glucose with the C. acetobutylicum monoculture. Ammonium acetate was selected for fermenting media as butanol production was increased from 9.8 to 10.9 g L−1 over the calcium carbonate test…
Resilience to social defeat-induced increased in ethanol intake: neuroinflammation response
2022
El estrés social es el principal factor de riesgo de las conductas adictivas. El fenotipo susceptible al estrés se ha convertido en la última década en un objetivo de estudio para la aplicación de tratamientos eficaces que mejoren la resiliencia al estrés. La promoción del afrontamiento activo mediante intervenciones farmacológicas y ambientales positivas está científicamente validada en el tratamiento de las adicciones. Sin embargo, estas intervenciones para promover la resiliencia durante la adolescencia como medida preventiva de experiencias estresantes intensas durante la edad adulta no han sido ampliamente estudiadas. Por ello, el objetivo principal de la presente Tesis Doctoral fue de…
Transcriptional Rewiring, Adaptation, and the Role of Gene Duplication in the Metabolism of Ethanol of Saccharomyces cerevisiae
2020
Ethanol is the main by-product of yeast sugar fermentation that affects microbial growth parameters, being considered a dual molecule, a nutrient and a stressor. Previous works demonstrated that the budding yeast arose after an ancient hybridization process resulted in a tier of duplicated genes within its genome, many of them with implications in this ethanol “produce-accumulate-consume” strategy. The evolutionary link between ethanol production, consumption, and tolerance versus ploidy and stability of the hybrids is an ongoing debatable issue. The implication of ancestral duplicates in this metabolic rewiring, and how these duplicates differ transcriptionally, remains unsolved. Here, we …
Patterns matter: continuous Vs intermittent access to ethanol differently affects withdrawal behavioural phenotype and maternal care in female rats.
2014
Modeling voluntary ethanol consumption in female rats is crucial for gaining further insight in gender-related vulnerability to alcohol. Since ethanol effects depend not only on the amount consumed, but also on drinking pattern, this study aimed at assessing the influence of continuous and intermittent ethanol self-administration on peculiar aspects of female behavioural repertoire during withdrawal and relapse. Female rats undergoing a 15-week-long, 20% ethanol continuous or intermittent (3days/week) access, respectively named CARs and IARs, were tested for alcohol intake (gr/kg) and preference. During withdrawal we assessed: novelty and reward preference in novel object exploration and sa…
Hairy Garlic (Allium subhirsutum) from Sicily (Italy): LC-DAD-MSn Analysis of Secondary Metabolites and In Vitro Biological Properties
2020
Allium subhirsutum, known as hairy garlic, is a bulbous plant widespread in the Mediterranean area and locally used as a food and spice. In the present study, the chemical profile of the ethanolic extracts from bulbs (BE) and aerial parts (APE) were analyzed by HPLC-ESI-MSn, and antioxidant properties were evaluated by DPPH, ABTS and TEAC assays. The traditional use in the diet, and the well documented biological activity of Allium species suggest a potential as a new nutraceutical. For this reason, the potential usefulness of this food can be considered in the treatment and prevention of degenerative Alzheimer disease. For this reason, acetylcholinesterase inhibitory property was investiga…
Oxidovanadium(v) complexes with l-proline-based amino acid phenolates
2019
Abstract l -proline was used to prepare chiral, tridentate amino acid phenol proligands H2L1–4. These proligands react with vanadium precursors VO(acac)2, VOSO4∙5H2O and VO(OPr)3 in methanol to form the corresponding oxidoalkoxidovanadium( v ) complexes 1–4. The complexes crystallize from methanol, and are octahedrally coordinated with a general formula [VO(L1–4)(OMe)(MeOH)]. In solution, however, they adopt several different conformations or isomeric structures depending on the solvent.