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  • 1
    Electronic Resource
    Electronic Resource
    Methylated antimony(V) compounds: Synthesis, hydride generation properties and implications for aquatic speciation (1992)
    New York, NY [u.a.] : Wiley-Blackwell
    Applied Organometallic Chemistry 6 (1992), S. 207-211 
    Details
    ISSN: 0268-2605
    Keywords: Dimethylantimony ; trimethylantimony ; analysis ; hydride generation ; aquatic speciation ; GCAA ; Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Reports in the literature that the compounds MeSb(O)(OH)2 and Me2Sb(O)(OH) are present in marine and fresh-waters need to be re-examined. The results of several synthetic strategies suggest that these methylantimony(V) compounds are either environmentally inaccessible or polymeric in nature. Pure samples of various di- and tri- methylated antimony(V) species were prepared and found to undergo molecular rearrangement reactions when subjected to hydride generation procedures typically used for aquatic speciation.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aoc.590060215
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    The photo-oxidation of solutions of arsenicals to arsenate: A convenient analytical procedure (1988)
    New York, NY [u.a.] : Wiley-Blackwell
    Applied Organometallic Chemistry 2 (1988), S. 1-7 
    Details
    ISSN: 0268-2605
    Keywords: Organoarsenic ; analysis ; hydride generation ; photo-oxidation ; marine clams ; HPLC ; GFAA ; Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The separation of arylarsonic acids by HPLC on a reverse-phase C18 column is described. Solutions containing these arsenicals and others such as arsenobetaine are photo-oxidized to arsenate by ultraviolet (UV) radiation (1200 W, 1 h exposure). This allows the analysis of the solution for arsenic by hydride generation techniques. The method, UV HGAA, is developed and applied to the determination of arsenic in the methanol extracts of the Manila clam (Verupis japonica) and the Horse clam (Schizothoerus nutalli).
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aoc.590020102
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    The metabolism of methylarsine oxide and sulfide (1989)
    New York, NY [u.a.] : Wiley-Blackwell
    Applied Organometallic Chemistry 3 (1989), S. 71-78 
    Details
    ISSN: 0268-2605
    Keywords: Arsenic ; metabolism ; Candida humicola ; methylarsines ; methylarsine oxide ; methylarsine sulfide ; micro-organisms ; Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Methylarsine oxide and sulfide are more toxic to Candida humicola than arsenite; the sulfide is rapidly metabolized to trimethylarsine (Me3As) and methylarsine (MeAsH2) and the oxide to dimethylarsinic acid [Me2AsO(OH)]. Cell-free extracts of C. humicola also convert the oxide to Me2AsO(OH). The glutathione (RSH) derivative Me2AsSR is metabolized by C. humicola to Me3As and Me2AsH, but some other Me2AsSR′ compounds are unaffected. Studies involving the interaction of the arsenic(III) compounds with natural ecosystems and other micro-organisms such as Scopulariopsis brevicaulis, Straptococcus sanguis, Escherichia coli, and Veillonella alcalescens are described.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aoc.590030107
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    The uptake of arsenicals by Candida humicola (1990)
    New York, NY [u.a.] : Wiley-Blackwell
    Applied Organometallic Chemistry 4 (1990), S. 119-125 
    Details
    ISSN: 0268-2605
    Keywords: Arsenate uptake ; Candida humicola ; active transport ; arsenicals ; diffusion ; two-site model ; Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The uptake of arsenate by Candida humicola requires an active transport system and may operate through low- and high-affinity sites. Arsenite, methylarsonate and dimethylarsinate are deduced to enter the cell by slow passive diffusion.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aoc.590040206
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Identification of extracellular arsenical metabolites in the growth medium of the microorganisms apiotrichum humicola and scopulariopsis brevicaulis (1994)
    New York, NY [u.a.] : Wiley-Blackwell
    Applied Organometallic Chemistry 8 (1994), S. 303-311 
    Details
    ISSN: 0268-2605
    Keywords: Arsenic ; extracellular ; endocellular ; methylation ; growth medium ; Apiotrichum humicola ; Scopulariopsis brevicaulis ; Candida humicola ; hydride generation-gas chromatography-atomic absorption spectrometry ; trimethylarsine oxide ; methylarsonate ; dimethylarsinate ; Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The separation and identification of some of the arsenic species produced in cells present in the growth medium when the microorganisms Apiotrichum humicola (previously known as Candida humicola) and Scopulariopsis brevicaulis were grown in the presence of arsenicals were achieved by using hydride generation-gas chromatography-atomic absorption spectrometry methodology (HG GC AA). Arsenite, monomethylarsonate, dimethylarsinate and trimethylarsine oxide were detected following incubation with arsenate. With arsenite as a substrate, the metabolites were monomethylarsonate, dimethylarsinate and trimethylarsine oxide; monomethylarsonate afforded dimethylarsinate and trimethylarsine oxide, and dimethylarsinate afforded trimethylarsine oxide. Trimethylarsine was not detected when the arsenic concentration was 1 ppm.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aoc.590080405
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    Paper (German National Licenses)
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