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M Krogh et al.
Journal of chromatography. B, Biomedical sciences and applications, 689(2), 357-364 (1997-02-21)
This paper describes microextraction and gas chromatographic analysis of diazepam from human plasma. The method was based on immobilisation of 1.5 microliters of 1-octanol on a polyacrylate-coated fiber designed for solid-phase microextraction. The solvent-modified fibre was used to extract diazepam
Danielle Dennewald et al.
Journal of biotechnology, 157(1), 253-257 (2011-11-15)
As clear structure-activity relationships are still rare for ionic liquids, preliminary experiments are necessary for the process development of biphasic whole-cell processes involving these solvents. To reduce the time investment and the material costs, the process development of such biphasic
Peter S Toth et al.
The Analyst, 140(6), 1947-1954 (2015-02-11)
Two-phase voltammetry has been carried out using a reverse cell configuration, i.e. with the lower density organic solvent on the top of the aqueous solution in the cell, where the organic solvents contain either nitrile or ketone functional groups. The
B H Smith
Behavioral neuroscience, 111(1), 57-69 (1997-02-01)
Studies of blocking between elements from the same stimulus modality elucidate how animals analyze such mixtures. Proboscis-extension conditioning of honey bees was used to examine the role of unconditioned stimulus (US) intensity in blocking in odorant mixtures. Several predictions from
Torsten Meiners et al.
Chemical senses, 28(3), 231-236 (2003-04-26)
In this paper we address the question how hymenopteran parasitoids deal with complex odour bouquets, using Microplitis croceipes (Cresson) (Hymenoptera: Braconidae) as a model. We examined the capacity of Microplitis croceipes to respond to individual compounds in flight chamber experiments
Marrit Eckstein et al.
Chemical communications (Cambridge, England), (9)(9), 1084-1085 (2004-04-30)
Due to favourable partition coefficients the highly enantioselective reduction of 2-octanone, catalysed by an alcohol dehydrogenase from Lactobacillus brevis, is faster in a biphasic system containing buffer and the ionic liquid [BMIM][(CF(3)SO(2))(2)N] compared to the reduction in a biphasic system
Enbo Xu et al.
Journal of food science, 80(7), C1476-C1489 (2015-06-20)
Enzymatic extrusion, instead of traditional steam cooking, to treat rice is an efficient and alternative pretreatment for Chinese rice wine fermentation. In order to determine the formation of volatiles in enzymatic extrusion-processed rice wine (EE), and to confirm its characteristic
Éder Costa Oliveira et al.
Talanta, 127, 59-67 (2014-06-11)
Hollow fiber liquid phase microextraction (HFLPME) and solid phase microextraction (SPME) methods for pre-concentration of contaminants (toluene, benzophenone, tetracosane and chloroform) in food simulants were investigated. For HFLPME 1-heptanol, 2-octanone and dibutyl-ether were studied as extracting solvents. Analysis by gas
T R Gervais et al.
Biotechnology progress, 16(2), 208-212 (2000-04-08)
The effect of aeration during cell growth on the subsequent reduction of 2-hexanone and 2-octanone by yeast cells entrapped in calcium alginate beads was studied. The reactions were conducted using 2-propanol as a sacrificial substrate to regenerate the cofactor NAD(H)
Fantao Meng et al.
Biotechnology letters, 32(4), 533-537 (2009-12-26)
An anti-Prelog alcohol dehydrogenase from Oenococcus oeni that reduces 2-octanone to (R)-2-octanol was purified by 26-fold to homogeneity. The enzyme had a homodimeric structure consisting of 49 kDa subunits, required NADPH, but not NADH, as a cofactor and was a
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
Xiao-Hong Chen et al.
PloS one, 9(4), e94543-e94543 (2014-04-18)
A novel carbonyl reductase (AcCR) catalyzing the asymmetric reduction of ketones to enantiopure alcohols with anti-Prelog stereoselectivity was found in Acetobacter sp. CCTCC M209061 and enriched 27.5-fold with an overall yield of 0.4% by purification. The enzyme showed a homotetrameric
D G Laing et al.
Chemical senses, 28(1), 57-69 (2002-12-28)
Increasing the concentration of an odorant increases the number of receptor cells and glomeruli in the olfactory bulb that are stimulated, and it is commonly acknowledged that these represent increased numbers of receptor types. Currently, it is not known whether
J Misumi et al.
Sangyo igaku. Japanese journal of industrial health, 24(5), 475-484 (1982-09-01)
An electrophysiological study of the neurotoxicity of 2-octanone (an analogue of methyl n-butyl ketone) and 2-hexanol (a metabolite of n-hexane) was conducted on rats as a part of the study to determine the specific molecular arrangement required for the development
Brett A Johnson et al.
The Journal of comparative neurology, 518(10), 1617-1629 (2010-03-17)
Although it has been shown repeatedly that minimum response times in sensory systems can be quite short, organisms more often continue to respond to sensory stimuli over considerably longer periods of time. The continuing response to sensory stimulation may be
Jian Hu et al.
Biotechnology letters, 28(14), 1115-1119 (2006-06-24)
An aqueous-organic biphasic system was established and used with whole cells of Oenococcus oeni to reduce 2-octanone to (R)-2-octanol. The conversion reached 99% when the Tris/borate buffer was increased from 50 mM to 300 mM in the aqueous phase. In
Shane Avison et al.
Journal of agricultural and food chemistry, 63(28), 6313-6318 (2015-06-23)
A new methodology is presented to measure water-air partition coefficients (Henry's constants) of volatiles, using APCI-MS. Significant advantages over other Henry's constant determination methods include the short measurement and sample preparation time and the possibility for simultaneous measurement of multiple
J S Hosler et al.
The Journal of experimental biology, 203(Pt 18), 2797-2806 (2000-08-23)
Recent studies of olfactory blocking have revealed that binary odorant mixtures are not always processed as though they give rise to mixture-unique configural properties. When animals are conditioned to one odorant (A) and then conditioned to a mixture of that
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
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