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Esterification activity and operational stability of Candida rugosa lipase immobilized in polyurethane foams in the production of ethyl butyrate.
Pires-Cabral P, et al.
Biochemical Engineering Journal, 48(2), 246-252 (2010)
Penelope A Lind et al.
Biochimica et biophysica acta, 1702(1), 103-110 (2004-09-29)
It has been generally accepted that enzyme activity requires a minimal hydration of about 0.2 g H2O g(-1) protein. This fits well with evidence that hydration above this level is associated with the onset of intramolecular motions. The influence of
Eduardo Coelho et al.
Food chemistry, 323, 126826-126826 (2020-04-27)
During beer ageing, endogenous barrel microbes grow spontaneously and transform wort/beer composition, being Dekkera bruxellensis and Saccharomyces cerevisiae among the main contributors to the chemical and sensory profile of aged beer. This work aims at the application of multi-starter cultures
Pablo M Cometto et al.
The journal of physical chemistry. A, 113(40), 10745-10752 (2009-09-15)
Kinetics of the reactions of OH radicals and Cl atoms with four saturated esters have been investigated. Rate coefficients for the gas-phase reactions of OH radicals with ethyl propanoate (k(1)), n-propyl propanoate (k(2)), methyl 2-methylpropanoate (k(3)), and ethyl n-butanoate (k(4))
Amélie Slegers et al.
Molecules (Basel, Switzerland), 20(6), 10980-11016 (2015-06-18)
Developed from crosses between Vitis vinifera and North American Vitis species, interspecific hybrid grape varieties are becoming economically significant in northern areas, where they are now extensively grown for wine production. However, the varietal differences between interspecific hybrids are not
Valentina Canuti et al.
Journal of agricultural and food chemistry, 67(9), 2647-2659 (2019-02-14)
Sangiovese is the most widespread Italian red cultivar and constitutes the basis of internationally known wines such as Chianti and Brunello di Montalcino. Outside of Europe, Argentina is the largest producer, followed by the United States. This study sought to
Boriana Atanasova et al.
Chemical senses, 30(3), 209-217 (2005-03-03)
The qualitative perceptual interactions in three binary mixtures of wine odorants were studied: isoamyl acetate (fruity note)/whisky lactone (woody note), ethyl butyrate (fruity note)/whisky lactone (woody note) and ethyl butyrate (fruity note)/guaiacol (woody note). For each binary mixture, the perceived
D Labbe et al.
Chemical senses, 32(3), 205-214 (2006-11-03)
The impact of olfactory perception on sweetness was explored in a model solution using odorants at subthreshold concentrations. First, the impact of 6 odorants, previously described in the literature as congruent with sweetness, was investigated at suprathreshold level in a
Dieter Wicher et al.
Nature, 452(7190), 1007-1011 (2008-04-15)
From worm to man, many odorant signals are perceived by the binding of volatile ligands to odorant receptors that belong to the G-protein-coupled receptor (GPCR) family. They couple to heterotrimeric G-proteins, most of which induce cAMP production. This second messenger
Pascal Fuchsmann et al.
Journal of agricultural and food chemistry, 63(34), 7511-7521 (2015-08-01)
To establish the odor profiles of three differently fabricated commercial Swiss Tilsit cheeses, analyses were conducted using headspace solid-phase microextraction gas chromatography-mass spectrometry/pulsed flame photometric detection and gas chromatography-olfactometry to identify and quantitate volatile compounds. In addition, odor quality and
Paweł Mochalski et al.
Cell biochemistry and biophysics, 71(1), 323-329 (2014-08-16)
Gas chromatography with mass spectrometric detection combined with head-space needle trap extraction as the pre-concentration technique was applied to identify and quantify volatile organic compounds released or metabolised by human umbilical vein endothelial cells. Amongst the consumed species there were
Stéphanie Rollero et al.
Applied microbiology and biotechnology, 99(5), 2291-2304 (2014-11-22)
Volatile compounds produced by yeast during fermentation greatly influence the organoleptic qualities of wine. We developed a model to predict the combined effects of initial nitrogen and phytosterol content and fermentation temperature on the production of volatile compounds. We used
Andres Garcia et al.
Advanced materials (Deerfield Beach, Fla.), 24(39), 5368-5373 (2012-08-14)
The influence of protonation reactions between poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) and a thiadiazolo[3,4-c]pyridine small-molecule donor are reported; these result in poor solar-cell performance due to a barrier for charge extraction. The use of a NiO(x) contact eliminates such deleterious chemical interactions and
Kaitlin S Carlson et al.
Journal of neurophysiology, 111(10), 2109-2123 (2014-03-07)
The olfactory tubercle (OT), a trilaminar structure located in the basal forebrain of mammals, is thought to play an important role in olfaction. While evidence has accumulated regarding the contributions of the OT to odor information processing, studies exploring the
Aidan Kiely et al.
Journal of neuroscience methods, 159(2), 189-194 (2006-08-22)
Olfactory receptors (ORs) are seven transmembrane proteins that are responsible for the transduction of volatiles into neuronal signals. Their low sequence homology means that the prediction of ligands for ORs based on extrapolation from empirical data of other ORs is
Salvatore Guarino et al.
Pest management science, 67(1), 77-81 (2010-10-19)
The red palm weevil (RPW), Rhynchophorus ferrugineus Olivier, accidentally introduced into the European countries facing the Mediterranean basin, is becoming the most serious pest for ornamental palms in the urban environment. In the present work, tests were conducted on the
Megan B Turner et al.
Biomacromolecules, 6(5), 2497-2502 (2005-09-13)
Preparation of cellulose-polyamine composite films and beads, which provide high loading of primary amines on the surface allowing direct one-step bioconjugation of active species, is reported using an ionic liquid (IL) dissolution and regeneration process. Films and bead architectures were
Vrushali Dandavate et al.
Bioresource technology, 100(13), 3374-3381 (2009-03-17)
Burkholderia multivorans V2 (BMV2) isolated from soil was found to produce an extracellular solvent tolerant lipase (6.477 U/mL). This lipase exhibited maximum stability in n-hexane retaining about 97.8% activity for 24h. After performing statistical optimization of medium components for lipase
Georgia Lytra et al.
Food chemistry, 194, 196-200 (2015-10-17)
Our study focused on variations in wine aroma perception and molecular composition during tasting over a period of 30min. In parallel, dynamic analytical and sensory methods were applied to study changes in the wines' molecular and aromatic evolution. Dynamic sensory
Eric S Folker et al.
Development (Cambridge, England), 139(20), 3827-3837 (2012-09-07)
Various muscle diseases present with aberrant muscle cell morphologies characterized by smaller myofibers with mispositioned nuclei. The mechanisms that normally control these processes, whether they are linked, and their contribution to muscle weakness in disease, are not known. We examined
Pingxi Xu et al.
Proceedings of the National Academy of Sciences of the United States of America, 111(46), 16592-16597 (2014-10-29)
Insect repellents are important prophylactic tools for travelers and populations living in endemic areas of malaria, dengue, encephalitis, and other vector-borne diseases. DEET (N,N-diethyl-3-methylbenzamide) is a 6-decade-old synthetic repellent, which is still considered the gold standard of mosquito repellents. Mosquitoes
Suhyoung Bahk et al.
BMC biology, 14(1), 83-83 (2016-10-01)
Like most animals, insects rely on their olfactory systems for finding food and mates and in avoiding noxious chemicals and predators. Most insect olfactory neurons express an odorant-specific odorant receptor (OR) along with Orco, the olfactory co-receptor. Orco binds ORs
Short-chain flavour ester synthesis by immobilized lipase in organic media.
Manjon A, et al.
Biotechnology Letters, 13(5), 339-344 (1991)
Mirela Kopjar et al.
Journal of the science of food and agriculture, 90(8), 1285-1292 (2010-05-18)
Partition coefficients give an indication of the retention of aroma compounds by the food matrix. Data in the literature are obtained by various methods, under various conditions and expressed in various units, and it is thus difficult to compare the
Cathy J Angely et al.
Behavioral and brain functions : BBF, 6, 26-26 (2010-05-27)
Unilateral naris occlusion (UNO) has been the most common method of effecting stimulus deprivation in studies of olfactory plasticity. However, despite the large corpus on the effects of this manipulation, dating back to the 19th century, little is known about
José Manuel Muñoz-Redondo et al.
Journal of agricultural and food chemistry, 65(13), 2768-2775 (2017-03-14)
A quantitative approach using HS-SPME-GC-MS was performed to investigate the ester changes related to the second fermentation in bottle. The contribution of the type of base wine to the final wine style is detailed. Furthermore, a discriminant model was developed
Geraldine Savary et al.
Journal of agricultural and food chemistry, 54(3), 665-671 (2006-02-02)
Diffusion-ordered spectroscopy (DOSY)-pulsed field gradient (PGF) nuclear magnetic resonance (NMR) spectroscopy was used to measure self-diffusion coefficients of aroma molecules in model fruit preparations. The impact of the sucrose content on aroma diffusion was specifically investigated, and the relationship with
Barbara Cerf-Ducastel et al.
Physiology & behavior, 81(3), 389-396 (2004-05-12)
A protocol suited to the investigations of odor-taste interactions in a functional magnetic resonance imaging (fMRI) scanner is described and results that confirm the validity of that protocol are presented. Stimuli were dissolved in water and presented to the mouth
Design of biosolvents through hydroxyl functionalization of compounds with high dielectric constant.
Guangnan Ou et al.
Applied biochemistry and biotechnology, 166(6), 1472-1479 (2012-01-17)
We proposed basic principles for biosolvent design on the viewpoint of ionization. Two classes of biosolvents, based on cyclic carbonate moiety and amide moiety, were designed through hydroxyl functionalization of highly dielectric compound. The newly designed compounds, glycerol carbonate (GC)
Laura L Holden et al.
Food and chemical toxicology : an international journal published for the British Industrial Biological Research Association, 136, 110945-110945 (2019-11-13)
Since 2007, electronic cigarette (e-cigarette) sales in the U.S. have surpassed those of tobacco cigarettes. This is due, in part, to manufacturer's claims that they are a safer alternative to tobacco cigarettes. However, formaldehyde, acrolein, and diacetyl have been detected
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