Hajšlová J., Lancová K., Sehnalová M., Krplová A., Zachariášová M., Moravcová H., Nedělník J., Marková J., Ehrenbergerová J. (2007): Occurrence of trichothecene mycotoxins in cereals harvested in the Czech Republic. Czech J. Food. Sci., 25: 339–350. A large-scale survey of the natural occurrence of trichothecene mycotoxins in major cereals harvested in the Czech Republic was conducted during th...

Background: The microbiological diagnosis of infectious diarrhoea may take several days using conventional techniques. In order to determine whether flatus can be used to make a rapid diagnosis, the volatile organic compounds associated with diarrhoea were analysed. Methods: Stool samples were collected from 35 patients with infectious diarrhoea and from six healthy controls. Gaseous compounds ...

background: to determine the atmospheric contamination by pesticides, conducting laboratory studies is necessary before operating field studies. the aim of this research study was to develop an analytical method to sample and simultaneously determine airborne amitraz and its metabolite. methods: a modified fritted impinger with acetonitrile as the liquid sorbent was used in order to study the a...

Calystegines were isolated from the root cultures of Physalis divaricata, P. pubescens, P. philadelphia,and P. philadelphia (solanaceae). Calystegines of P. divaricata were identified as calystegine A3, A5, B1 and B2, with concentrations of 6.99, 4.41, 8.52, and 14.7 ?g/g in fresh mass, respectively. Root cultures of P.pubescens contain calystegine A3, B1 and B2, P. philadelphia only contains ...

From June 1998 to May 2007, 9566 urine samples were collected from patients with psychomotor deficits, seizures, vomiting and unconsciousness in Peking University First Hospital. Their urine organic acids profiles were analysed using gas chromatography - mass spectrometry (GCMS), GCMS solution and Inborn Errors of Metabolism Screening System software. In all patients, blood acylcarnitines were ...

A simple gas-liquid chromatographic method has been developed for the measurement of cholesterol and some plant sterols, such as campesterol, ~-sitosterol and avenasterol, in pasta products. Samples were saponified, without prior extraction of lipids, and the concentrated unsaponifiables analysed directly by gas liquid chromatography. The results were evaluated statistically, and they showed th...

phosalone, malathion and diazinon were analyzed in corn oil using solid phase extraction (spe)with lanthanum silicate as a new solid sorbent followed by gas chromatography with nitrogenphosphorus detection (gc-npd). the efficiency of different eluents (methanol, dichloromethane,ethyl acetate, dichloromethane — ethyl acetate (1:1) and ethyl acetate — methanol (1:1)) werecompared for elution of o...