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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Fresenius' journal of analytical chemistry 367 (2000), S. 279-283 
    ISSN: 1432-1130
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Based on a highly significant correlation between the visual fluorescing fraction of PAH on the one hand and the total EPA-PAH16 content in mineral soils on the other hand, a deliberately incomplete RP-TLC separation of these compounds into a few fingerprint-like compressed bands within a determined “PAH window” has been achieved. The resulting band-pattern does not interfere normally with the more or less non-polar phenolic compounds which are associated with natural soil humic substances. The extraction step has been extremely simplified with regard to the quantity of the soil sample and of the extractant. The accuracy of this procedure has been ascertained by means of recovery experiments with an artificial soil enriched with PAH. A single spot application mode and an evaluation scheme allow the estimation of EPA-PAH16 contents of soil samples in relation to threshold values ¶(1 or 5 or 10 mg/kg). This HPTLC screening method has been compared against standard HPLC methods. The simplified extraction step and the separation by HPTLC minimizes the actual costs and the time spent per sample.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1432-1173
    Keywords: Schlüsselwörter UV-Schutzfaktor ; Kleidung ; Sonnenschutz ; Prävention ; Key words Fabrics ; Clothes ; Sun protection ; Prevention ; Skin cancer
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary A rising incidence worldwide of skin cancer has been observed for years. A high cumulative exposure to UV radiation is a major factor in the development of such neoplasms. Suitable protective measures are therefore becoming increasingly important. Textiles provide simple, effective and medically safe protection against UV radiation. At present, however, in Europe – in contrat to Australia – the UV protection factor (UPF) for summer textiles is not stated. It is a largely unknown fact that by far not all textiles offer sufficient protection. Our goal was to study the factors which determine the UV transmission of fabrics and, based on these findings, to design materials which provide enhanced protection. A spectrophotometric method was used to determine the UV transmission by fabrics made of cotton, silk, polyester and viscose. The UV protection factors of the fabrics were computed on the basis of the transmission data. The UV protection factor is dependent on the type of fibre, yarn and surface design, weight per square metre, moisture content, colour, finishing method and degree of wear. To optimize the UV protection via textiles, a viscose yarn with a low UV transmission was used. This yarn makes it possible to design light-weight summer fabrics with optimized UV protection. This development will make it possible to offer clothing with high UV protection on the European marked. This clothing will not be more expensive than normal products, so that effective prevention should be more available.
    Notes: Zusammenfassung Seit Jahren wird ein weltweiter Anstieg der Hautkrebsinzidenz beobachtet. Eine hohe kumulative UV-Strahlenexposition gilt als ein Hauptfaktor für die Entstehung von Neoplasien der Haut. Geeignete Schutzmaßnahmen gewinnen daher zunehmend an Bedeutung. Textilien bieten eine einfachen und effektiven, medizinisch unbedenklichen Schutz vor der UV-Strahlung, doch wird der UV-Schutzfaktor (USF) von Sommertextilien, z.Z. in Europa – im Gegensatz zu Australien – nicht angegeben.Weitgehend unbekannt ist in diesem Zusammenhang, daß bei weitem nicht alle Textilien einen ausreichenden Schutz bieten. Ziel ist, die Faktoren, welche die UV-Durchlässigkeit von Stoffen bestimmen, zu untersuchen und ausgehend von diesen Ergebnissen Materialien mit verbessertem Schutz zu konstruieren. Die UV-Durchlässigkeit wurde an Geweben aus Baumwolle, Seide, Polyester und Viskose mit einer spektralphotometrischen Methode bestimmt. Die UV-Schutzfaktoren der Stoffe wurden aus den Transmissionsdaten berechnet. Anhand der Ergebnisse konnte gezeigt werden, daß UV-Schutzfaktor von der Faserart, der Garn- und Flächenkonstruktion, dem Quadratmetergewicht, dem Feuchtegehalt, der Färbung, der Ausrüstung und der Abnutzung durch den Gebrauch der Stoffe abhängt. Zur Optimierung des UV-Schutzes durch Stoffe wurde erstmals ein Viskosegarn mit einer extrem geringen UV-Durchlässigkeit eingesetzt. Dieses Garn ermöglicht es, leichte Sommerstoffe mit optimiertem UV-Schutz zu konstruieren. Zukünftig wird es damit möglich sein, Kleidung mit einem hohen UV-Schutzfaktor anzubieten. Diese Kleidung wird nicht teurer sein als normale Produkte, so daß eine hohe Effektivität für unsere Präventionsbemühungen erwartet werden kann.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Journal of radioanalytical and nuclear chemistry 89 (1985), S. 389-398 
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract The possibilities of strontium separation from medium activity waste (MAW) solutions have been investigated. MAW originates from the PUREX process and contains NaNO3 and HNO3 in a large excess. By solvent extraction with the crown ether dicyclohexano-18-crown-6 (DC-18-C-6) in 1,1,2,2-tetrachloroethane, separation is possible. The distribution ratio for Sr2+ depends on the concentration of HNO3, NaNO3 and Pb(NO3)2. The extraction system is employed in a continuous counter-current process. After use, the extraction agent can easily be regenerated by reextraction with pure water.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Chromatographia 22 (1986), S. 388-390 
    ISSN: 1612-1112
    Keywords: Size exclusion chromatography ; Proteins ; Optimization of resolution
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary Optimization strategies for improvement of peak capacity in size exclusion chromatography (SEC) of proteins with chemically modified silica columns are discussed. Decreasing flow rate and particle diameter and increasing the pore volume per unit column volume help to improve peak capacity in SEC.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Fresenius' Zeitschrift für analytische Chemie 317 (1984), S. 687-688 
    ISSN: 1618-2650
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 6
    Publication Date: 2017-02-25
    Description: Mutational landscape reflects the biological continuum of plasma cell dyscrasias Blood Cancer Journal 7, e537 (February 2017). doi:10.1038/bcj.2017.19 Authors: A Rossi, M Voigtlaender, S Janjetovic, B Thiele, M Alawi, M März, A Brandt, T Hansen, J Radloff, G Schön, U Hegenbart, S Schönland, C Langer, C Bokemeyer & M Binder
    Electronic ISSN: 2044-5385
    Topics: Medicine
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