The Experts below are selected from a list of 306 Experts worldwide ranked by ideXlab platform
Birte Nielsen - One of the best experts on this subject based on the ideXlab platform.
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Where is the TMT? GC-MS analyses of fox Feces and behavioral responses of rats to fear-inducing odors
Chemical Senses, 2018Co-Authors: Olivier Rampin, Nathalie Jerome, Audrey Saint-albin Deliot, Christian Ouali, Frank Boué, Nicolas Meunier, Birte NielsenAbstract:TMT (2,5-dihydro-2,4,5-trimethylthiazoline) is known as a component of fox Feces inducing fear in rodents. However, no recent chemical analyses of fox Feces are available, and few studies make direct comparisons between TMT and fox Feces. Fox Feces from 3 individuals were used to prepare 24 samples to be analyzed for the presence of TMT using gas chromatography-mass spectrometry (GC-MS). When TMT was added in low amounts (50–2000 nmol/g), TMT was detected in 10 out of 11 samples. When no TMT was added, TMT was detected in only 1 out of 13 samples. In a second experiment, we tested the behavioral response of male Brown Norway (BN) and Wistar rats to either fox Feces, a low amount of TMT (0.6 nmol) or 1-hexanol. TMT induced freezing in the rats, but fox Feces induced significantly more freezing episodes and longer total duration of freezing in both rat strains. In experiment 3, male BN rats were exposed over several days to fox Feces, rat Feces, 1-hexanol, cadaverine, 2-phenylethylamine, and TMT, one odor at a time. Fox Feces induced significantly more freezing episodes of a longer total duration than any of the other odors, with rat Feces and 1-hexanol giving rise to the lowest amount of freezing. This finding, together with our inability to verify the presence of TMT in fox Feces, indicates that the concentration of TMT in our fox Feces samples was below 50 nmol/g. It may also be that other compounds in fox Feces play a role in its fear-inducing properties.
Robert K. Wayne - One of the best experts on this subject based on the ideXlab platform.
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Facts from Feces revisited
Trends in ecology & evolution, 1997Co-Authors: Michel H. Kohn, Robert K. WayneAbstract:Obtaining information on wild mammal populations has been a long-standing logistical problem. However, an array of non-invasive techniques is available, including recently developed molecular genetic techniques for the analysis of Feces (molecular scatology). A battery of non-invasive, molecular approaches can be used on Feces, which in conjunction with conventional analysis are potentially useful for assesing genetic structure, demography and life history of mammals. Several technical problems reman before large-scale studies of Feces can be undertaken productively, but already studies are providing insight into population subdivision, food habits, reproduction, sex ratio and parasitology of free-ranging populations.
Zhang Bin - One of the best experts on this subject based on the ideXlab platform.
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HPLC determination of roxarsone and its elimination in Feces of swine.
Chinese journal of veterinary science, 2010Co-Authors: Wang Zhiqiang, Zhao Bing, Zhang BinAbstract:A high performance liquid chromatography(HPLC) method was developed for determination of roxarsone levels in Feces of swine.The limit of detection and limit of quantitation of roxarsone in Feces of swine were 0.05 mg/kg and 0.1 mg/kg,respectively.The mean recoveries of roxarsone ranged from 82.09%-84.03%.Coefficients of variation ranged from 2.92%-5.45%.Twenty-four healthy changmei crossbreed pigs were randomly divided into 4 groups and were fed with feed containing roxarsone(0,25,50 and 100 mg/kg).Then,the Feces were collected and analysed by HPLC at 0 to 120 h after administered.The excreted amount of roxarsone reached a peak at 36-48 h after feeding,with a peak concentrarion of 12.31,22.52 and 34.78 mg/kg,respectively.Then,the amount of roxarsone in the Feces reduced gradually,and roxarsone was undetectable in swine Feces within 72,108 and 132 h after feeding,respectively.In 150 samples of swine Feces collected from fifteen swine farms in Shandong and Jiangsu province,the average concentration of roxarsone in pig Feces was 23.13 mg/kg.
Olivier Rampin - One of the best experts on this subject based on the ideXlab platform.
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Where is the TMT? GC-MS analyses of fox Feces and behavioral responses of rats to fear-inducing odors
Chemical Senses, 2018Co-Authors: Olivier Rampin, Nathalie Jerome, Audrey Saint-albin Deliot, Christian Ouali, Frank Boué, Nicolas Meunier, Birte NielsenAbstract:TMT (2,5-dihydro-2,4,5-trimethylthiazoline) is known as a component of fox Feces inducing fear in rodents. However, no recent chemical analyses of fox Feces are available, and few studies make direct comparisons between TMT and fox Feces. Fox Feces from 3 individuals were used to prepare 24 samples to be analyzed for the presence of TMT using gas chromatography-mass spectrometry (GC-MS). When TMT was added in low amounts (50–2000 nmol/g), TMT was detected in 10 out of 11 samples. When no TMT was added, TMT was detected in only 1 out of 13 samples. In a second experiment, we tested the behavioral response of male Brown Norway (BN) and Wistar rats to either fox Feces, a low amount of TMT (0.6 nmol) or 1-hexanol. TMT induced freezing in the rats, but fox Feces induced significantly more freezing episodes and longer total duration of freezing in both rat strains. In experiment 3, male BN rats were exposed over several days to fox Feces, rat Feces, 1-hexanol, cadaverine, 2-phenylethylamine, and TMT, one odor at a time. Fox Feces induced significantly more freezing episodes of a longer total duration than any of the other odors, with rat Feces and 1-hexanol giving rise to the lowest amount of freezing. This finding, together with our inability to verify the presence of TMT in fox Feces, indicates that the concentration of TMT in our fox Feces samples was below 50 nmol/g. It may also be that other compounds in fox Feces play a role in its fear-inducing properties.
Michel H. Kohn - One of the best experts on this subject based on the ideXlab platform.
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Facts from Feces revisited
Trends in ecology & evolution, 1997Co-Authors: Michel H. Kohn, Robert K. WayneAbstract:Obtaining information on wild mammal populations has been a long-standing logistical problem. However, an array of non-invasive techniques is available, including recently developed molecular genetic techniques for the analysis of Feces (molecular scatology). A battery of non-invasive, molecular approaches can be used on Feces, which in conjunction with conventional analysis are potentially useful for assesing genetic structure, demography and life history of mammals. Several technical problems reman before large-scale studies of Feces can be undertaken productively, but already studies are providing insight into population subdivision, food habits, reproduction, sex ratio and parasitology of free-ranging populations.
