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  • 1
    Electronic Resource
    Electronic Resource
    Application of solid-phase microextraction to monitoring indoor air quality (1999)
    Springer
    Fresenius' journal of analytical chemistry 363 (1999), S. 696-699 
    Details
    ISSN: 1432-1130
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Practical application of Solid-Phase Microextraction (SPME) for the assessment of the quality of indoor air is presented. SPME was used to sample selected organic pollutants (carbon tetrachloride, benzene, toluene, chlorobenzene, p-xylene and n-decane). An SPME fiber was coated with a 100 μm film of polydimethylsiloxane. The analytes extracted were analysed with a gas chromatograph directly coupled with a mass spectrometer (GC-MS). The method was used to assess the indoor air quality in a few selected flats. The concentrations ranged from below detection limits to 6.9 mg/m3 for benzene depending on the flat; they were relatively high for newly built or freshly renovated flats.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002160051273
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    CHANGES IN THE FRYING MEDIUM DURING DEEP-FRYING OF FOOD RICH IN PROTEINS AND CARBOHYDRATES (2001)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food lipids 8 (2001), S. 0 
    Details
    ISSN: 1745-4522
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Notes: Changes in the frying medium (rapeseed oil) during controlled deep-frying of sliced potatoes and cod fillets and oil heated without them were compared. Fifteen frying cycles were conducted each day for five days. Results showed that oil after frying of cod fillets contained 10% less triacylglycerol (TAG) polymers and 40% less TAG dimers than other oils. Other parameters (iodine and anisidine values and absorption value at 233nm) showed that less thermooxidative products formed during frying of food rich in proteins. Oil after frying of cod fillets was darker and its acid value was significantly higher than that for other oils. Content of TAG polymers and dimers for oil after frying of sliced potatoes and oil heated without food was equal. The relative loss of C18:2 acid and decrease in iodine value showed that oil after heating without food underwent more intensive thermooxidative transformation than other oils.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1745-4522.2001.tb00200.x
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  • 3
    Electronic Resource
    Electronic Resource
    Stimulation of Transformation by Thalidomide (1965)
    [s.l.] : Nature Publishing Group
    Nature 205 (1965), S. 621-621 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] An aqueous solution of thalidomide was prepared by dissolving the drug in 0.1 N KOH and then immediately neutralizing with diluted HC1 so that concentration was 100 mg/ml. Directly after its dissolution thalidomide was added to the medium to a final concentration of 200 µg/ml. One general ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/205621a0
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Studies on the Use of Commercial Capillary Gas Chromatographic Columns as Diffusion Denuders (2000)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 23 (2000), S. 449-454 
    Details
    ISSN: 0935-6304
    Keywords: Denuders ; isolation and enrichment ; analysis ; volatile organic compounds ; partition coefficients Kfs ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: ---The possibility of using a piece of gas chromatographic capillary column as a tubular denuder for isolation and enrichment of organic pollutants present in air was studied. The partition coefficients (Kfs) of typical organic pollutants (benzene, chlorobenzene, toluene) between the gaseous phase and the denuder sorption layer were determined and effects of analyte concentration in the gaseous phase and gas flow rate on partitioning were studied. The partition coefficients were found to be constant in the studied range of concentration and gaseous mixture flow rate. A piece of a capillary column coated with polydimethylosiloxane can be used as a tubular denuder.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
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    Paper (German National Licenses)
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