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110132

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Elena Gómez Alvarez et al.
Talanta, 88, 252-258 (2012-01-24)
A characterisation of a system designed for active sampling of gaseous compounds with Solid Phase Microextraction (SPME) fibres is described. This form of sampling is useful to automate sampling while considerably reducing the sampling times. However, the efficiency of this
Charles J Weschler et al.
Environmental science & technology, 41(17), 6177-6184 (2007-10-17)
We have used multiple analytical methods to characterize the gas-phase products formed when ozone was added to cabin air during simulated 4-hour flights that were conducted in a reconstructed section of a B-767 aircraft containing human occupants. Two separate groups
T Rababah et al.
Poultry science, 85(6), 1107-1113 (2006-06-17)
The effect of irradiation on thiobarbituric acid reactive substances (TBARS) and volatile compounds in raw and cooked nonirradiated and irradiated chicken breast meat infused with green tea and grape seed extracts was investigated. Chicken breast meat was vacuum infused with
M A Weigand et al.
Critical care medicine, 28(10), 3429-3435 (2000-11-01)
To investigate whether inhaled nitric oxide (NO) enhances pulmonary lipid peroxidation as indicated by arterial blood levels of malondialdehyde, hexanal, and pentanal in patients with acute respiratory distress syndrome (ARDS). Prospective, nonrandomized, controlled trial. Surgical intensive care unit in a
R T Marsili
Journal of chromatographic science, 37(1), 17-23 (1999-02-13)
A sensitive, rapid procedure for testing lipid oxidation products in milk is developed using solid-phase microextraction (SPME) and gas chromatography-mass spectrometry. SPME is as sensitive as dynamic headspace (DH) analysis for measuring the pentanal and hexanal produced in milk after
Christophe Yrieix et al.
Chemosphere, 79(4), 414-419 (2010-02-23)
Six European laboratories used the emission test chamber method (EN ISO 16000-9) for the determination of VOC and formaldehyde emissions from a wood based panel (particleboard). The tested panel was conditioned without wrapping over 28 d at 23 degrees C
Hiroshi M Ueno et al.
Journal of food science, 77(8), C853-C858 (2012-08-07)
The iron-lactoferrin complex (FeLf) is useful for dietary iron supplementation. However, the effects of FeLf on iron-catalyzed off-flavors in lipid-containing food products have not been reported. In this study, we investigated the effects of FeLf on off-flavors development during the
Ulrich Neuenschwander et al.
Ultrasonics sonochemistry, 19(5), 1011-1014 (2012-03-06)
The application of high-amplitude ultrasound to liquids triggers cavitation. By the collapse of the thereby appearing vacuum cavities, high temperatures can be reached in a transient manner. The high temperatures in these hot-spots can lead to homolytic scission of chemical
Trine K Dalsgaard et al.
Journal of agricultural and food chemistry, 54(17), 6367-6373 (2006-08-17)
Aldehydes formed as a result of lipid oxidation form fluorophores after binding to proteins. The structure of the fluorophores formed by reaction between saturated aldehydes and lysine has not yet been identified. The reaction products formed in the reaction between
Ryan Moazamian et al.
Molecular human reproduction, 21(6), 502-515 (2015-04-04)
Oxidative stress is known to compromise human sperm function and to activate the intrinsic apoptotic cascade in these cells. One of the key features of oxidatively stressed spermatozoa is the induction of a lipid peroxidation process that results in the
ShuLing Wang et al.
Analytica chimica acta, 900, 67-75 (2015-11-18)
In this paper, polypyrrole/graphene (PPy/G) composite coating was prepared by a facile electrochemical polymerization strategy on the inner surface of a stainless steel (SS) tube. Based on the coating tube, a novel online in-tube solid-phase microextraction -high performance liquid chromatography
Ki-Hyun Kim
Sensors (Basel, Switzerland), 10(8), 7287-7302 (2010-01-01)
To simulate the occurrence of masking phenomena with the aid of an air dilution sensory (ads) test, two types of odorant mixtures were prepared: (1) M(2) with two individual odorants [H(2)S and acetaldehyde (AA)] and (2) M(6) with six individual
François Fenaille et al.
Rapid communications in mass spectrometry : RCM, 18(1), 67-76 (2003-12-23)
Upon hexanal-modification in the presence of NaCNBH(3), the oxidized B chain of insulin becomes mono- and further dialkylated on both the N-terminal and Lys(29) residues. A pseudo-MS(3) study was performed with a triple-quadrupole mass spectrometer on the different modified lysine-containing
JianCai Zhu et al.
Journal of agricultural and food chemistry, 63(34), 7499-7510 (2015-08-11)
The aroma profile of oolong tea infusions (Dongdingwulong, DDWL; Tieguanyin, TGY; Dahongpao, DHP) were investigated in this study. Gas chromatography-olfactometry (GC-O) with the method of aroma intensity (AI) was employed to investigate the aroma-active compounds in tea infusions. The results
Zhiqiang Yan et al.
Neuron, 58(4), 613-624 (2008-05-24)
Olfactory sensory neurons expressing a common receptor gene converge onto one or a few glomeruli with stereotyped positions within the mouse main olfactory bulb (MOB), producing a map of approximately 1800 olfactory columns representing approximately 1000 odorant receptors. Here, we
Ko Kobayakawa et al.
Nature, 450(7169), 503-508 (2007-11-09)
The mammalian olfactory system mediates various responses, including aversive behaviours to spoiled foods and fear responses to predator odours. In the olfactory bulb, each glomerulus represents a single species of odorant receptor. Because a single odorant can interact with several
Yu Wang et al.
Journal of agricultural and food chemistry, 63(28), 6293-6296 (2015-07-08)
Inflammation-related reactive oxygen species (ROS) and reactive nitrogen species (RNS) are associated with the development of cancer. ROS and RNS can directly damage biomacromolecules such as proteins, DNA, and lipids. Lipid peroxidation, however, can result in reactive carbonyl species (RCS)
P Scalabrini et al.
International journal of food microbiology, 39(3), 213-219 (1998-04-29)
Soybean milk, which serves as a base for a variety of beverages, contains raffinose, stachyose, pentanal and n-hexanal; the former two may be responsible for flatulence after fermentation, whilst the latter two for a beany flavour. Twenty-seven strains of Bifidobacterium
Diana M Stafforini et al.
The Journal of biological chemistry, 281(8), 4616-4623 (2005-12-24)
F2-isoprostanes are produced in vivo by nonenzymatic peroxidation of arachidonic acid esterified in phospholipids. Increased urinary and plasma F2-isoprostane levels are associated with a number of human diseases. These metabolites are regarded as excellent markers of oxidant stress in vivo.
Yun Wang et al.
Journal of chromatography. A, 952(1-2), 79-83 (2002-06-18)
The n-valeraldehyde modified Chitosan (pentyl-Chitosan CL) was prepared by Schiff-base formation and hydrogenation. By studying the IR spectra of Chitosan and pentyl-Chitosan CL, it is suggested that a pentyl group is linked to 2'-NH, by a C-N bond. The influence
Kimberly J Grossman et al.
The European journal of neuroscience, 27(10), 2676-2685 (2008-05-01)
Odor mixtures can produce several qualitatively different percepts; it is not known at which stage of processing these are determined. We asked if activity within the first stage of olfactory processing, the glomerular layer of the olfactory bulb, predicts odor
J H Lee et al.
Journal of food science, 74(7), C563-C568 (2009-11-10)
Effects of fluorescent light, riboflavin, ascorbic acid, sodium azide, and butylated hydroxyanisole (BHA) on the volatiles in milk at 4 degrees C were determined using a combination of headspace-solid phase microextraction (HS-SPME), gas chromatography (GC), and mass spectrometry (MS). Pentanal
Yong-Hyun Kim et al.
Journal of separation science, 35(21), 2914-2921 (2012-10-16)
In this study, the sorptive loss patterns for volatile organic compounds were evaluated by gaseous standards containing 13 compounds (benzene, toluene, styrene, p-xylene, methyl ethyl ketone, methyl isobutyl ketone, isobutyl alcohol, butyl acetate, acetaldehyde, propionaldehyde, butyraldehyde, isovaleraldehyde, and valeraldehyde). The
Lilian Regina Barros Mariutti et al.
Journal of food science, 76(6), C909-C915 (2012-03-16)
The effects of the addition of sage and garlic in chicken meat on lipid and cholesterol oxidation, having as prooxidant factors the addition of salt, thermal treatment, and frozen storage, were evaluated. The content of unsaturated fatty acids did not
Nobuo Ochiai et al.
Journal of chromatography. A, 1421, 103-113 (2015-08-16)
An extension of multi-volatile method (MVM) technology using the combination of a standard dynamic headspace (DHS) configuration, and a modified DHS configuration incorporating an additional vacuum module, was developed for milliliter injection volume of aqueous sample with full sample evaporation.
T Daussmann et al.
European journal of biochemistry, 248(3), 889-896 (1997-10-28)
Cell-free extracts of Methanosarcina barkeri DSM 804 showed alcohol dehydrogenase activity under aerobic conditions when N,N-dimethyl-4-nitrosoaniline (NDMA) was used as an artificial electron acceptor. The NDMA-dependent alcohol dehydrogenase (NDMA-ADH) was purified to approximate homogeneity by column chromatography. It is most
J B Webster et al.
Journal of food science, 74(9), S390-S398 (2010-05-25)
Milk packaged in glass bottles overwrapped with iridescent films (treatments blocked either a single visible riboflavin [Rb] excitation wavelength or all visible Rb excitation wavelengths; all treatments blocked UV Rb excitation wavelengths) was exposed to fluorescent lighting at 4 degrees
Zahra Hadian et al.
Iranian journal of pharmaceutical research : IJPR, 13(2), 393-404 (2014-09-23)
Omega-3 fatty acids (FAs) have been shown to prevent cardiovascular disease. The most commonly used omega-3 fatty acids like eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA) are highly vulnerable to oxidation and therefore, have short shelf life. Recent advances in
Jing Huang et al.
Analytica chimica acta, 878, 102-108 (2015-05-24)
In the current study, we introduced a novel polystyrene/graphene (PS/G) composite nanofiber film for thin film microextraction (TFME) for the first time. The PS/G nanofiber film was fabricated on the surface of filter paper by a facile electrospinning method. The
A M Bassi et al.
Drug and chemical toxicology, 20(3), 173-187 (1997-08-01)
The metabolism of acetaldehyde (ACA), benzaldehyde (BA), propionaldehyde (PA) and valeraldehyde (VA) has been studied in two hepatoma cell lines, the rat HTC and mouse Hepa 1c1c7 cells. The cytotoxicity of the four aldehydes to these two cell lines has
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