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Showing 1-30 of 50 results for "537683" within Papers
Catarina L Silva et al.
Talanta, 89, 360-368 (2012-01-31)
A sensitive assay to identify volatile organic metabolites (VOMs) as biomarkers that can accurately diagnose the onset of breast cancer using non-invasively collected clinical specimens is ideal for early detection. Therefore the aim of this study was to establish the
Alexandros Papachristoforou et al.
PloS one, 7(10), e47432-e47432 (2012-10-24)
Honeybees secrete 2-heptanone (2-H) from their mandibular glands when they bite. Researchers have identified several possible functions: 2-H could act as an alarm pheromone to recruit guards and soldiers, it could act as a chemical marker, or it could have
J Enrique Cometto-Muñiz et al.
Behavioural brain research, 201(1), 207-215 (2009-05-12)
We measured concentration-detection (i.e., psychometric) odor functions for the homologous ketones propanone (acetone), 2-pentanone, 2-heptanone, and 2-nonanone. Under a forced-choice procedure, stimuli were presented via an 8-channel air-dilution olfactometer that allowed natural sampling of the odorant and whose output was
Miriam Kolko et al.
Molecular vision, 20, 511-521 (2014-05-03)
To investigate the significance of calcium-independent phospholipase A₂, group VIA (iPLA2-VIA), in RPE cell survival following responses to sodium iodate (SI) in cell cultures. The human retinal pigment epithelium (RPE) cell line (ARPE-19) cells and primary mouse-RPE cultures were treated
Yvette Naudé et al.
Journal of chromatography. A, 1216(14), 2798-2804 (2008-10-22)
A headspace sampling method is described for concentrating milk volatiles onto a multi-channel open tubular silicone rubber trap (MCT) for thermal desorption into a GC-FID. Sections of the chromatographic profile, single peaks or combinations of compounds are recaptured with secondary
M A Kotterman et al.
Gene therapy, 22(2), 116-126 (2014-12-17)
Gene delivery vectors based on adeno-associated viruses (AAV) have exhibited promise in both preclinical disease models and human clinical trials for numerous disease targets, including the retinal degenerative disorders Leber's congenital amaurosis and choroideremia. One general challenge for AAV is
Adriana de Lima Mendonça et al.
Antonie van Leeuwenhoek, 95(4), 295-303 (2009-02-14)
The secretions of the mandibular and metapleural glands of leaf cutting ants contain antimicrobial substances that protect the mutualistic fungal colony within the nest from attack by parasitic micro-organisms. The major constituents of these secretions (citral, 4-methyl-3-heptanol, 2-heptanone, 3-octanone, 4-methyl-2-heptanone
Julien Januszkiewicz et al.
Journal of chromatography. A, 1195(1-2), 16-24 (2008-05-23)
A headspace solid-phase microextraction (HS-SPME) combined with gas chromatography-mass spectrometry (GC/MS) method was developed using experimental designs to quantify the flavor of commercial Cheddar cheese and enzyme-modified Cheddar cheese (EMCC). Seven target compounds (dimethyl disulfide, hexanal, hexanol, 2-heptanone, ethyl hexanoate
Yoshinori Suzuki et al.
Current biology : CB, 30(6), 1110-1118 (2020-03-07)
Serotonin (5-HT) represents a quintessential neuromodulator, having been identified in nearly all animal species [1] where it functions in cognition [2], motor control [3], and sensory processing [4]. In the olfactory circuits of flies and mice, serotonin indirectly inhibits odor
Pascale Chalier et al.
Journal of agricultural and food chemistry, 55(3), 867-875 (2007-02-01)
The transport properties of two methyl ketones, 2-heptanone and 2-nonanone, through a paper coated with a wheat gluten (WG) solution were studied as a function of aroma compound concentration differential and relative humidity. Whatever the conditions, coating improved the aroma
Chun-Chieh Lin et al.
PloS one, 10(10), e0139675-e0139675 (2015-10-03)
Drosophila olfactory receptor neurons are found within specialized sensory hairs on antenna and maxillary palps. The linking of odorant-induced responses to olfactory neuron activities is often accomplished via Single Sensillum Recordings (SSR), in which an electrode inserted into a single
Fangfang Zeng et al.
Insect biochemistry and molecular biology, 113, 103213-103213 (2019-08-24)
Mosquitoes rely heavily on the olfactory system to find a host for a bloodmeal, plants for a source of energy and suitable sites for oviposition. Here, we examined a cluster of eight odorant receptors (ORs), which includes one OR, CquiOR1
T Fujita et al.
Clinica chimica acta; international journal of clinical chemistry, 287(1-2), 99-109 (1999-10-06)
Pipecolic acid is regarded as a gamma-aminobutyric acid receptor agonist. Stereochemical studies of pipecolic acid were performed in patients with chronic liver diseases. Plasma D- and L-pipecolic acid were significantly elevated in 15 liver cirrhotic patients with no history of
V A Isidorov et al.
Journal of chromatography. B, Analytical technologies in the biomedical and life sciences, 885-886, 109-116 (2012-01-17)
Using headspace solid-phase microextraction (HS-SPME) followed by diethyl ether and methanol extraction, it was possible to isolate as many as 185 organic compounds out of 17 samples of crude royal jelly (RJ). Of the above compound number, 169 compounds were
Carlos M Contreras et al.
Neuropsychobiology, 66(3), 167-173 (2012-09-06)
Wistar rats subjected to physical stress release a urine alarm pheromone (2-heptanone) that produces signs of anxiety and despair in receptor rats not subjected to physical stress. However, unknown are the effects of 2-heptanone on the firing rate of the
Koutaroh Okada et al.
Chemical senses, 34(5), 425-433 (2009-04-14)
The olfactory system of an insect brain codes for information about odorant quality and quantity using the temporal pattern of neural activity as well as neurons' firing. Although an accurate odor temporal pattern is indispensable for investigations of olfactory systems
Ana G Gutiérrez-García et al.
Physiology & behavior, 91(1), 166-172 (2007-04-06)
The present study was aimed to determine whether the urine from donor rats, which were physically stressed (UD-PS) by unavoidable electric footshocks, produces despair in receptor partner rats (RP) in the long-term. For each trial, an RP rat was placed
Ontogeny of the fine structure of the mandibular glands of the honeybee (Apis mellifera L.) workers and the pheromonal activity of 2-heptanone.
Vallet A, et al.
Journal of Insect Physiology, 37(11), 789-804 (1991)
Alina Silvia Chiper et al.
The journal of physical chemistry. A, 114(1), 397-407 (2009-12-05)
The products of 2-heptanone conversion by dielectric barrier discharge plasma are analyzed under different conditions: alternating current (ac) or pulsed mode of excitation, variable energy, variable composition of the carrier gas. The efficiency of the conversion is higher using a
Ana Rivas-Cañedo et al.
Meat science, 93(2), 178-186 (2012-10-03)
The effect of dietary supplementation with either vitamin E (300 ppm) or a red wine extract rich in polyphenols (900 ppm) in an omega-3 enriched concentrate on the volatile fraction of lamb meat was assessed. The effect of refrigerated storage
Poonam Bhandari et al.
Chemical senses, 31(7), 627-639 (2006-06-10)
Integrins are cell adhesion molecules that mediate numerous developmental processes in addition to a variety of acute physiological events. Two reports implicate a Drosophila beta integrin, betaPS, in olfactory behavior. To further investigate the role of integrins in Drosophila olfaction
O Campollo et al.
Revista de investigacion clinica; organo del Hospital de Enfermedades de la Nutricion, 44(4), 483-490 (1992-10-01)
Several toxic factors have been implicated in the pathogenesis of hepatic encephalopathy (PSE) among which ammonia plays a dominant role. More recently, the gamma-aminobutyric acid (GABA) hypothesis in which an increase in the GABA-ergic tone and the presence of one
Kazumi Osada et al.
Chemical senses, 34(8), 713-721 (2009-09-18)
Rat urine contains many volatile constituents that may be used for chemical communication. The levels of certain urinary volatiles are strongly dependent on the sex and endocrine status (e.g., puberty). We performed chemical and behavioral studies to identify the volatiles
Changcheng Sun et al.
Acta physiologica (Oxford, England), 231(4), e13626-e13626 (2021-02-14)
Oxytocin plays an important role in social recognition in rodents, which is mediated predominantly by the olfactory system. Although oxytocin modulates neural activity in the olfactory bulb, the underlying mechanism is largely unknown. Here, we studied how direct infusion of
Nor H Kamarulzaman et al.
Talanta, 191, 535-544 (2018-09-29)
Different extraction procedures were evaluated to assess their potential for measuring volatile organic compounds (VOCs) from raw rubber materials. Four headspace sampling techniques (SHS, DHS, HS-SPME and µ-CTE) were studied. Each method was firstly optimised to ensure their reliability in
E M Goldberg et al.
Journal of chromatography, 226(2), 291-299 (1981-12-11)
Volatile organic substances present in blood plasma and cerebrospinal fluids of certain control groups of human subjects and cirrhotic patients some of whom were suffering from hepatic encephalopathy were quantitatively analysed and identified. A rapid, reproducible, direct injection capillary column
Yao-Hua Zhang et al.
Chemical senses, 36(2), 125-135 (2010-10-28)
Olfactory cues play a vital role in kin recognition and mate choice of the rat. Here, using 2 inbred strains of rats, Brown Norway (BN) and Lewis, as models to simulate kinship via genetic distance, we examined whether urine-derived volatiles
Oxidation of 2-heptanone in air by a DBD-type plasma generated within a honeycomb monolith supported Pt-based catalyst.
Ayrault C, et al.
Catalysis Today, 89(1), 75-81 (2004)
Irene Ibba et al.
Die Naturwissenschaften, 97(12), 1059-1066 (2010-10-26)
The olfactory circuitry of Drosophila melanogaster is becoming increasingly clear. However, how olfactory processing translates into appropriate behavioral responses is still poorly understood. Using a sibling species approach, we tested how a perturbation in the olfactory circuitry affects odor preference.
Frederic A Borries et al.
Journal of the science of food and agriculture, 99(14), 6267-6277 (2019-07-02)
2-Heptanone is a volatile liquid known to be effective in protecting honey bees from parasitic mite infestations in hives. The present study aimed to show that chemical derivatives of 2-heptanone would release the ketone for a significantly longer time than
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