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  • 1
    Digitale Medien
    Digitale Medien
    Field technique for monitoring p-cresol in streams (1982)
    s.l. : American Chemical Society
    Analytical chemistry 54 (1982), S. 2631-2632 
    Details
    ISSN: 1520-6882
    Quelle: ACS Legacy Archives
    Thema: Chemie und Pharmazie
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1021/ac00251a062
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  • 2
    Digitale Medien
    Digitale Medien
    Alterations in cytometric characteristics of hemocytes from the American oyster Crassostrea virginica exposed to a polycyclic aromatic hydrocarbon (PAH) contaminated environment (1992)
    Springer
    Marine biology 113 (1992), S. 247-252 
    Details
    ISSN: 1432-1793
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Abstract The effects of residing in a polycyclic aromatic hydrocarbon (PAH) contaminated environment on the cytometric characteristics of hemocytes from the American oyster Crassostrea virginica (collected from the Rappahannock River, Virginia, USA in Spring 1991) were analyzed using a multichannel Coulter counter (10000 hemocytes oyster-1). The percentage and relative volume of small-sized hemocytes (〉2.5 to 5.1 μm) was higher (P〈0.01) in oysters from Hospital Point (HP, a PAH contaminated site) in the Elizabeth River (ER), Virginia, compared to oysters from the relatively unpolluted Rappahannock River (RR). On the contrary, a decrease (P〈0.001) in the percentage and volume of larger hemocytes (〉6.2 to 10 μm) was observed in the HP-oysters. Maintaining the RR-oysters at the HP site for 8 wk induced statistically significant increases in the number and relative volume contribution of the 〉2.5 to 5.1 μm hemocytes and sharp decreases in the occurrence and relative volume of 〉6.2 to 13 μm cells (P〈0.01). By depurating the HP-oysters in the York River (the control site), the number of, and volume contributed by the small hemocytes (〉2.5 to 5.1 μm) showed a significant decrease over time as compared to the baseline values. On the other hand, the relative number of 〉6.2 to 13 μm hemocytes increased sharply within 8 wk (P〈0.001). This indicates that these changes are both inducible and reversible and, at least in part, due to exposure to the ER-sediment. Based on these studies, oyster hemocyte cytometric characteristics could be developed as a sensitive biomarker of exposure to PAH.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00347278
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  • 3
    Digitale Medien
    Digitale Medien
    Analysis of tributyltin in estuarine sediments and oyster tissue, Crassostrea virginica (1987)
    New York, NY [u.a.] : Wiley-Blackwell
    Applied Organometallic Chemistry 1 (1987), S. 541-544 
    Details
    ISSN: 0268-2605
    Schlagwort(e): Tributyltin ; Analysis ; Sediments ; Tissue ; Oyster ; Chemistry ; Organic Chemistry
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Notizen: An analytical method to determine tributyltin (TBT) in oyster tissue, Crassostrea virginica, and estuarine sediments is described. Recoveries of TBT from oysters range from 86 to 102% when samples are fortified at concentrations ranging from 22 to 890 μg kg-1 (wet weight); recoveries from sediment range from 92 to 105% for samples fortified from 20 to 500 μg kg-1 (dry weight).Feral oysters and natural sediments were analysed and shown to be contaminated with TBT. Oysters collected near a marina contained concentrations as high as 1.5 mg kg-1 (wet weight).
    Zusätzliches Material: 1 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/aoc.590010608
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  • 4
    Digitale Medien
    Digitale Medien
    The importance of natural variabilities in the total analytical schemeVIMS Contribution No. 969. (1981)
    Chichester : Wiley-Blackwell
    Biological Mass Spectrometry 8 (1981), S. 416-418 
    Details
    ISSN: 1052-9306
    Schlagwort(e): Chemistry ; Analytical Chemistry and Spectroscopy
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Notizen: Concentrations of synthetic organics and trace metals in tissues or sediment may vary by hundreds of percents even when replicate samples are collected from the same biological population, i.e. school of fish, or the same location on the bottom of the stream. Without a knowledge of these variations, decisions based on analytical data interpretations are difficult and often in error. Some reasons for these variations will be discussed, with examples presented from field data which include: trace metals and pesticides in bottom sediments, pesticides in suspended sediments and plankton, pesticides in fish populations and trace metals in mollusks.
    Zusätzliches Material: 3 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/bms.1200080911
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