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  • 1
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Journal of Pharmaceutical and Biomedical Analysis 10 (1992), S. 187-191 
    ISSN: 0731-7085
    Keywords: Methylphenidate ; analysis. ; derivatization ; drug screening ; elimination ; methylation with BF"3-methanol ; ritalinic acid ; stimulant ; urine
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology , Medicine
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Fresenius' Zeitschrift für analytische Chemie 343 (1992), S. 170-171 
    ISSN: 1618-2650
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1420-911X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Vergleich des Gehaltes von 14 polyzyklischen aromatischen Kohlenwasserstoffen in Sediment- und Schwebestauben in der Nähe von Autobahnstrecken mit Bitumen- und Betonbelag zwischen Lausanne und Genf. 14 polyzyklische aromatische Kohlenwasserstoffe (paKW) haben wir im Sedimentstaub bestimmt, der auf dem Boden an 3 verschiedenen Stellen der Autobahn Genf-Villeneuve gesammelt wurde. 1) im Freien, auf einem Abschnitt mit Zementbelag 2) im Freien, auf einem Abschnitt mit Bitumenbelag 3) im geschlossenen Raum eines Strassentunnels mit Bitumenbelag Schwebestaub, am Rand einer befahrenen Strecke der Autobahn gesammelt, haben wir auch analysiert. Die vier Proben haben ziemlich ähnliche relative polyzyklische aromatische Kohlenwasserstoffe (paKW) Gehalt; absolute Werte ändern sich trotzdem in den verschiedenen Stellen. PaKW-Bildung ist nicht wichtiger auf den Abschnitten mit Bitumenbelag als auf den Abschnitten mit Zementbelag. An den vier Stellen sind die Kraftfahrzeugabgase der Ursprung der Luftverunreinigung durch die paKW.
    Abstract: Summary Comparison of the content in 14 polycyclic aromatic hydrocarbons in sedimented dust and suspended air particles collected along the bitumen and concrete coated stretches of highways between Lausanne and Geneva. Fourteen polycyclic aromatic hydrocarbons (PAH) are determined in sedimented dust and suspended air particles collected along the highway. 3 types of sedimented particles are compared in the following situations: 1) in open atmosphere, on concrete sector of the road 2) in open atmosphere, on bitumen coated stretch 3) in the stuffy atmosphere of a road-tunnel, bitumen coated Analyses are also carried out on suspended air particles of a high density traffic sector of the highway. Quantities of PAH are of the same order in situations 1) and 2). The PAH profiles are identical but with variations in amplitude and suggest that automobile gas exhausts are the principal source of pollution by PAH.
    Notes: Résumé On dose 14 hydrocarbures aromatiques polycycliques dans des échantillons de poussières sédimentées et en suspension dans l'air recueillies en bordure d'autoroute. On compare 3 types de poussières sédimentées: 1) à l'air libre, sur revêtement cimenté 2) à l'air libre, sur revêtement bitumineux 3) dans l'air confiné d'un tunnel routier, sur revêtement bitumineux On a effectué aussi l'analyse de poussières en suspension dans l'air sur un tronçon d'autoroute à forte densité de trafic. Les profils d'hydrocarbures aromatiques polycycliques ont la même allure pour tous les échantillons, les quantités totales pouvant varier d'une situation à l'autre. La formation d'hydrocarbures n'est pas plus importante sur les secteurs à revêtement bitumineux que sur ceux à revêtement cimenté. Les gaz d'échappement sont la source de pollution par les hydrocarbures aromatiques polycycliques dans les 4 cas envisagés.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Sozial- und Präventivmedizin 29 (1984), S. 201-202 
    ISSN: 1420-911X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Eine Orientierungsstudie über die PAH-Gehalte in einem geschlossenen Raum wurde in Hinblick auf Ventilation und Anzahl gerauchter Zigaretten durchgeführt. Emissionsfaktoren der PAH und derer Methylhomologen im Haupt- und Nebenrauch wurde bei leichten und starken Zigaretten bestimmt.
    Notes: Summary An orientation study on concentration levels of PAH in a closed space was carried out with concern about ventilation and quantity of cigarettes smoked. Emission factors of PAH and their methyl derivatives in the main and side-streams of light and heavy cigarettes were determined.
    Type of Medium: Electronic Resource
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  • 5
    ISSN: 1420-911X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary Cannabis cigarettes of comparable potency were smoked by experimental smokers. Peak excretion occurs between 2 to 7 hours and falls rapidly in the first 30 hours period. Elimination then goes on slowly over 5 days. Individual and interindividual variations are observed. The test can detect occasional use of cannabis no longer than 36 h to 48 h with good probability. Negative detected user can suddenly excrete metabolites to positive levels. This has a consequence on the use of the test to screen exposed group for epidemiologic studies.
    Notes: Zusammenfassung Cannabis Zigaretten vergleichbarer Stärk wurden von experimentellen Probanden geraucht. Des Ausscheidungsmaximum zwischen 2 bis 7 Stunden folgt eine rasche Abnahme während den ersten 30 Std. und eine langsame Elimination während 5 Tage. Individuelle sowie Interprobanden Schwankungen wurden festgestellt. Der Test kann mit zulässiger Sicherheit auf gelegentlichen Cannabiskonsum nicht länger als 36 bis 48 Std. aufweisen. Negativ erscheinende Konsumenten können plötzlich Metabolite in positiven Mengen ausscheiden. Beim Einsatz des Tests zum Screening exponierter Gruppen in epidemiologischen Unterschungen müssen diese Befunde berücksichtigt werden.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 8 (1985), S. 198-199 
    ISSN: 0935-6304
    Keywords: Gas chromatography, GC ; Fused silica capillary columns ; On-column injection ; External standard technique ; Quality control ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 7 (1984), S. 270-273 
    ISSN: 0935-6304
    Keywords: Gas chromatography ; Capillary column ; Temperature-programmed analysis ; Retention indices ; Polychclic aromatic hydrocarbons (PAH) ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 53 (1970), S. 1873-1875 
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The stability constants of 2, 2-bis-hydroxymethyl-propionates of rare earths have been determined at ionic strength 0,100 (NaClO4) at 25.0°C by a potentiometric method. The ligand forms 1 : 1 and 1 : 2 complexes with all the rare earths and weak 1 : 3 complexes with light rare earths only. In these last complexes, it binds in a unidentate way. The dissociation constant of the acid has also been measured.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 54 (1971), S. 916-919 
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The stability constants of N-acetylgycinates of some rare earths in aqueous solution have been determined by a potentiometric method, and by a solvent extraction technique. The ligand forms 1:1 complexes which are stabilized by relatively large positive entropies of formation, the corresponding enthalpies being endothermic. This backs up the assumption that a conjugate base of an amino acid forms innersphere complexes and acts as a unidentate ligand towards a rare earth cation, like a simple carboxylate.
    Additional Material: 3 Tab.
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 52 (1969), S. 2154-2156 
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The stability constants of 2-furanecarboxylates and 2-thiophencarboxylates of some rare earths have been determined at ionic strength 0.100 (NaClO4) at 25.0°C by a potentiometric method. The ligands form 1 : 1 complexes similar to the rare earths propionates.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
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