In the present study, a simple and sensitive methodology based on dynamic headspace solid-phase microextraction (HS-SPME) followed by thermal desorption gas chromatography with quadrupole mass detection (GC-qMSD), was developed and optimized for the determination of volatile (VOCs) and semi-volatile (SVOCs) compounds from different alcoholic beverages: wine, beer and whisky. Key experimental fa...

Headspace sampling-gas chromatography (HS-GC) coupled with an internal standard method (ISM) was developed to analyze the volatile flavor compounds in top fermented wheat beer in the laboratory. Eight compounds, i.e. acetaldehyde, N-propanol, ethyl acetate, isobutyl alcohol, isoamyl alcohol, isoamyl acetate, ethyl hexanoate and ethyl octanoate were separated and quantified. This method was vali...

Global demand for Low-Alcohol Beer (LAB) and Alcohol-Free (AFB) has surged due to flavor attributes, health benefits, lifestyle changes, prompting efforts process intensification. This paper aims offer a detailed modelling basis LAB manufacturing study optimisation. A first-principles dynamic model conventional beer been re-parameterized used simulation of Cold Contact Fermentation (CCF), an ef...

BACKGROUND Fatty acid ethyl esters (FAEEs) are products of nonoxidative ethanol metabolism. After incorporation in hair, they should be suitable long-term markers of alcohol abuse. METHODS Hair samples from 19 alcoholics in a treatment program, 10 fatalities with verified excessive alcohol consumption, 13 moderate social drinkers who consumed up to 20 g ethanol/day, and 5 strict teetotalers w...

A new antibiotic, aterrimin (Lewis et al., 1953), is unstable in aqueous solution at pH 7, and insoluble at lower pH levels. Aterrimin can be dissolved in absolute alcohol and the solutions can be used satisfactorily in a cylinder-plate type of assay (Heatley, 1944). Further investigation has established that sevbral other organic solvents are nontoxic to various bacteria when used in cylinders...

In this work the stability of GBL (gamma-butyrolactone) and GHB (gamma-hydroxybutyric acid) in alcoholic media was studied. Under acidic conditions the GBL will react with ethanol or methanol to give the corresponding ethyl and methyl esters of GHB. It can be seen that ester formation is dependent on the type of alcohol, the alcohol content of the solution, and the pH of the solution. Under the...

Because of the importance of alcohol-induced heart muscle disease and the obscurity of its pathogenesis, this study was undertaken to determine whether fatty acid ethyl esters, myocardial metabolites of ethanol recently described in our laboratory to be synthesized in cell-free extracts of rabbit myocardium, accumulate in hearts of human subjects exposed to ethanol in vivo. Lipid extracts were ...

BACKGROUND We investigated agreement between self-reported prenatal alcohol exposure (PAE) and objective meconium alcohol markers to determine the optimal meconium marker and threshold for identifying PAE. METHODS Meconium fatty acid ethyl esters (FAEE), ethyl glucuronide (EtG), and ethyl sulfate (EtS) were quantified by LC-MS/MS in 0.1 g meconium from infants of Safe Passage Study participan...

Symplocos racemosa Roxb bark belongs to the family: Symplocaceae. In Ayurveda it is known as Lodhra. The bark was collected and dried for four days under sun and powdered. It was extracted with different solvents ethanol, methanol and ethyl acetate by soxhlet hot extraction process. Preliminary phytochemical analysis was carried out for different extracts. It was found that saponin glycosides a...