Kinetics of lipase-catalyzed esterification of hexanoic acid and ethyl alcohol using the solvent-free system, surface coated lipase from Candida rugosa, had been studied. The effect of various parameters such as reaction time, reaction temperature, reaction kinetics, water removal and feasibility of solvent-free system had been focused. Candida Rugosa lipase was more effective than other li...

A study of typification of cider brandies on the basis of the origin of the raw material used in their manufacture was conducted using chemometric techniques (principal component analysis, linear discriminant analysis, and Bayesian analysis) together with their composition in volatile compounds, as analyzed by gas chromatography with flame ionization to detect the major volatiles and by mass sp...

A combined untargeted and targeted approach was established for fingerprinting volatile organic compounds in winter jujubes from eight regions of China. Volatiles, including alcohols, aldehydes, acids, esters, alkenes, were identified by gas chromatography-ion mobility spectrometry (GC-IMS). Benzyl alcohol, octanoic acid, 2-hexenal, linalool, 2-nonenal, ethyl decanoate the most common present a...

Biodiesel fuels consist of a mixture different fatty acid esters. The thermophysical properties the esters are decisive for combustion and storage. Especially density viscosity influence, e.g., energy density, spray quality lubrication in diesel engine. For some esters, several studies on can be found literature wide pressure reasonably temperature range. However, data at high pressures as well...

Transcription of acetyl-CoA carboxylase in avian liver is low during starvation or after consumption of a low-carbohydrate, high-fat diet and high during consumption of a high-carbohydrate, low-fat diet. The role of fatty acids or metabolites derived from fatty acids in the nutritional control of acetyl-CoA carboxylase transcription was investigated by determining the effects of long- and mediu...

A headspace-proton-transfer-reaction time-of-flight mass spectrometer (PTR-TOF/MS) system that combines PTR-TOF/MS with a dynamic and reactive flavor-release monitoring was constructed to measure the orthonasal aroma components in beer before after foaming. Some headspace of foaming real time, such as m/z 145.1150 173.1536, are thought be derived mainly from ethyl hexanoate octanoate, respectiv...

Grape-based brandies are one of the most popular alcoholic beverages in world. The one, Cognac, comes from Charentes region Southwest France, and it is mostly produced grape variety ‘Ugni Blanc’. However, wines destined for elaboration wine spirits also come different white varieties; ‘Colombard’, ‘Folle Blanche’, ‘Montils’, ‘Semillon’. In this study, possibility using red varieties ‘Cabernet S...

Studies were conducted to assess glacial acetic acid (GAA) with various host plant volatiles (HPVs) and the sex pheromone, (E,E)-8, 10-dodecadien-1-ol, of codling moth, Cydia pomonella (L), as lures in traps for tortricid pests that often co-occur in tree fruits in the western United States. In addition to codling moth, field trapping studies were conducted with oriental fruit moth, Grapholita ...