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  • 1
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    Metals and pesticide levels found in fish taken from Vancouver Lake: memorandum to Steve O'Brien, dated May 19, 1977 (2021)
    State of Washington, Department of Ecology | Olympia, WA
    In:  http://aquaticcommons.org/id/eprint/3381 | 15 | 2015-04-28 21:13:02 | 3381
    Details
    Publikationsdatum: 2021-06-25
    Beschreibung: The Vancouver Lake Pilot Dredge Study revealed concentrations of certain chemicals which could be of concern: the metals copper, zinc and mercury and the pesticides lindane and aldrin were found in significant amounts. (PDF contains 1 page)
    Schlagwort(e): Pollution ; Fisheries ; Chemistry ; mercury ; zinc ; copper ; lindane ; aldrin ; pollution ; Vancouver Lake (Wash.)
    Repository-Name: AquaDocs
    Materialart: monograph
    Format: image/tiff
    Format: image/tiff
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  • 2
    Digitale Medien
    Digitale Medien
    Removal of lead from aqueous solutions by Penicillium biomass (1993)
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 42 (1993), S. 785-787 
    Details
    ISSN: 0006-3592
    Schlagwort(e): biosorption ; biosorbent ; Penicillium ; biomass ; lead ; wastewater treatment ; Chemistry ; Biochemistry and Biotechnology
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Biologie , Werkstoffwissenschaften, Fertigungsverfahren, Fertigung
    Notizen: The removal of lead ions from aqueous solutions by adsorption on nonliving Penicillium chrysogenum biomass was studied. Biosorption of the Pb+2 ion was strongly affected by pH. Within a pH range of 4 to 5, the saturated sorption uptake of Pb+2 was 116 mg/g dry biomass, higher than that of activated charcoal and some other microorganisms. At pH 4.5, P. chrysogenum biomass exhibited selectivity for Pb+2 over other metal ions such as Cd+2, Cu+2, Zn+2, and As+3 Sorption preference for metals decreased in the following order: Pb 〉 Cd 〉 Cu 〉 Zn 〉 As. The sorption uptake of Pb+2 remained unchanged in the presence of Cu+2 and As+3, it decreased in the presence of Zn+2, and increased in the presence of Cd+2. © 1993 John Wiley & Sons, Inc.
    Zusätzliches Material: 4 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/bit.260420615
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  • 3
    Digitale Medien
    Digitale Medien
    Flotation of Streptomyces pilosus after lead accumulation (1991)
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 37 (1991), S. 955-959 
    Details
    ISSN: 0006-3592
    Schlagwort(e): flotation ; Streptomyces pilosus ; lead ; adsorption ; sodium dodecylsulfate ; Chemistry ; Biochemistry and Biotechnology
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Biologie , Werkstoffwissenschaften, Fertigungsverfahren, Fertigung
    Notizen: The flotation of Streptomyces pilosus was studied in the absence and presence of adsorbed Pb(II) ions on the cell walls and with and without using sodium dodecylsulfate (SDS) as collector. Adsorption of SDS onto the organism in the absence and presence of Pb(II) ions was also investigated. It was found that in the absence of adsorbed Pb(II), very little flotation took place with or without the presence of SDS although SDS adsorbed to some extent on the organism. The presence of Pb(II) on the bacterium's cell walls significantly increased flotation even in the absence of the collector. Addition of SDS, however, further increased both flotation rate and recovery.
    Zusätzliches Material: 6 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/bit.260371009
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  • 4
    Digitale Medien
    Digitale Medien
    Construction and evaluation of a metal ion biosensor (1993)
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 42 (1993), S. 945-952 
    Details
    ISSN: 0006-3592
    Schlagwort(e): metal ion biosensor ; bioluminescence ; mer-lux genetic construction ; mercury ; Chemistry ; Biochemistry and Biotechnology
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Biologie , Werkstoffwissenschaften, Fertigungsverfahren, Fertigung
    Notizen: Escherichia coli, genetically engineered with a mercury(II)-sensitive promoter and the lux genes from Vibrio fischeri, were used as microbial bioluminescent sensors for the detection of mercury. Evaluation of this genetic construction was carried out by determining the effects of various parameters on cell suspensions maintained at constant conditions in a small 100-mL vessel. The strongest light intensities and quickest induction times occurred with cells in the midexponential growth phase maintained at 28°C, concentrated to 1 × 109 cells/mL, mixed at very fast speeds, and aerated at 2 vvm (volume of air per volume of culture per minute) during light measurement in the small vessel. The cells were sensitive to the mercuric ion in the range of 20 nM to 4 μM (4 to 800 ppb), and the total response time was on the order of 1 hour, depending on the above parameters. The cells exhibited great specificity for mercury. The cells had almost equal specificity for organic and inorganic forms of the mercuric ion and responded more weakly to the mercurous ion. A simple, inexpensive, durable miniature probe (3 mL) was constructed and operated using the optimum parameters found in the small vessel as a guide. The range of sensitivity to the mercuric ion detected in the probe was 10 nM to 4 μM when aeration was provided. © 1993 John Wiley & Sons, Inc.
    Zusätzliches Material: 10 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/bit.260420805
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  • 5
    Digitale Medien
    Digitale Medien
    Solid Phase Microextraction and GC-MIP-AED for the Speciation Analysis of Organomercury Compounds (1999)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 22 (1999), S. 181-182 
    Details
    ISSN: 0935-6304
    Schlagwort(e): Gas chromatography ; microwave induced emission spectrometry ; speciation ; mercury ; SPME, headspace SPME ; Chemistry ; Analytical Chemistry and Spectroscopy
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Notizen: ---No abstract
    Zusätzliches Material: 1 Ill.
    Materialart: Digitale Medien
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  • 6
    Digitale Medien
    Digitale Medien
    Ion-selective langmuir blodgett films of a chromoionophore (1995)
    New York, NY [u.a.] : Wiley-Blackwell
    Advanced Materials for Optics and Electronics 5 (1995), S. 137-143 
    Details
    ISSN: 1057-9257
    Schlagwort(e): sensor ; Langmuir-Blodgett film ; chromoionophore ; crown ether ; complex formation ; stability constant ; absorbance ; water ; metal cation ; silver ; mercury ; lead ; barium ; Chemistry ; Polymer and Materials Science
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Elektrotechnik, Elektronik, Nachrichtentechnik , Physik
    Notizen: Langmuir-Blodgett films built up from an amphiphilic derivative of benzothiazolium styryl dye containing a 1,10-dithia-18-crown-6 ether group have been found to complex with ‘soft’ polarisable ions such as Ag+ and Hg2+ in water. The films exhibited high sensitivity (stability constant of complex formation K ≈ 105 M-1) and high selectivity (e.g. K(Ag+)/K(Pb2+)〉 105) compared with aqueous solutions of similar ionophores. This was attributed to the predominant formation of complexes with ligand-cation stoichiometries of 2:1 in the films.
    Zusätzliches Material: 6 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/amo.860050302
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  • 7
    Digitale Medien
    Digitale Medien
    Binding capacity of casein to lead and voltammetric speciation of lead in milk with a nafion coated electrode (1992)
    Weinheim : Wiley-Blackwell
    Electroanalysis 4 (1992), S. 653-659 
    Details
    ISSN: 1040-0397
    Schlagwort(e): Casein ; lead ; milk ; speciation ; Chemistry ; Polymer and Materials Science
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Notizen: The complexation of lead with casein (CS) was studied by several voltammetric methods, as was the selective determination and speciation of lead in milk. First, cyclic voltammetry (CV) was used to examine the influence of adsorbed casein and complexation on the electrochemical response of lead at neutral and alkaline pHs. Second, by titrating solutions of CS with lead, two mathematical methods based on differential-pulse anodic stripping voltammetry (DPASV) for evaluating the binding properties of CS to lead were compared with a hanging mercury drop electrode (HMDE) and a Nafion-covered mercury film electrode (Nf-MFE). In all cases, the conditional stability constants for the Pb-CS complex agreed well and were close to log β′ = 5.5 at pH 7.0. Finally, lead was directly determined with the chemically modified electrode in acidified samples (≍pH 0.3) of whole and skim milk at the ng/ml level, with no need for preliminary acid digestion.
    Zusätzliches Material: 9 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/elan.1140040609
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  • 8
    Digitale Medien
    Digitale Medien
    Bacterial resistances to mercury and copper (1991)
    New York, N.Y. : Wiley-Blackwell
    Journal of Cellular Biochemistry 46 (1991), S. 106-114 
    Details
    ISSN: 0730-2312
    Schlagwort(e): copper ; heavy metal ; ion transport ; mercury ; resistance ; Life and Medical Sciences ; Cell & Developmental Biology
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Biologie , Chemie und Pharmazie , Medizin
    Notizen: Heavy metals are toxic to living organisms. Some have no known beneficial biological function, while others have essential roles in physiological reactions. Mechanisms which deal with heavy metal stress must protect against the deleterious effects of heavy metals, yet avoid depleting the cell of a heavy metal which is also an essential nutrient. We describe the mechanims of resistance in Escherichia coli to two different heavy metals, mercury and copper. Resistance of E. coli to mercury is reasonably well understood and is known to occur by transport of mercuric ions into the cytoplasmic compartment of the bacterial cell and subsequent reductive detoxification of mercuric ions. Recent mutational analysis has started to uncover the mechanistic detail of the mercuric ion transport processes, and has shown the essential nature of cysteine residues in transport of Hg(II). Resistance to copper is much less well understood, but is known to involve the increased export of copper from the bacterial cell and modification of the copper; the details of the process are still being elucidated.Expression of both metal resistance determinants is regulated by the corresponding cation. In each case the response enables the maintenance of cellular homeostasis for the metal. The conclusions drawn allow us to make testable predictions about the regulation of expression of resistance to other heavy metals.
    Zusätzliches Material: 5 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/jcb.240460204
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  • 9
    Digitale Medien
    Digitale Medien
    CdHgO2: Ein Oxomercurat mit Verwandtschaft zur Crednerit-StrukturProfessor Wilhelm Preetz zum 60. Geburtstage gewidmet (1994)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 620 (1994), S. 1137-1141 
    Details
    ISSN: 0044-2313
    Schlagwort(e): Cadmium ; mercury ; oxide ; high pressure ; crystal structure ; Chemistry ; Inorganic Chemistry
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Beschreibung / Inhaltsverzeichnis: CdHgO2: An Oxomercurate related to the Crednerite StructureSingle crystals of CdHgO2 were prepared by oxygen high pressure technique (600°C, 3900 bar) and investigated by X-ray technique. It crystallizes with monoclinic symmetry, space group C2h3-C2/m; a = 5.933, b = 3.452, c = 5.875 Å, β = 91.26°; Z = 2. The Hg2+ ions show dumb-bell like coordination, Cd2+ an octahedral one. CdHgO2 shows strong relationship to the Crednerite structure. The orientation of the O—Hg—O dump-bells to the CdO6 octahedra layers is discussed with respect to related oxomercurates.
    Notizen: CdHgO2 wurde mit Sauerstoff-Hochdrucktechnik (600°C, 3900 bar) einkristallin dargestellt und röntgenographisch untersucht. Es kristallisiert monoklin, Raumgruppe C2h3-C2/m mit a = 5,933, b = 3,452, c = 5,875 Å, β = 91,26° und Z = 2. Die Hg2+-Ionen zeigen eine hantelförmige, Cd2+ eine oktaedrische Koordination. CdHgO2 zeigt große Ähnlichkeit zur Crednerit-Struktur. Die Anordnung der O—Hg—O-Hanteln zu den CdO6-Oktaederschichten wird unter Bezug auf verwandte Oxomercurate diskutiert.
    Zusätzliches Material: 3 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/zaac.19946200702
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  • 10
    Digitale Medien
    Digitale Medien
    Synthese und Struktur des ersten ternären Blei(II)-Oxocuprats(I): PbCu2O2Professor Wilhelm Preetz zum 60. Geburtstage gewidmet (1994)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 620 (1994), S. 1307-1311 
    Details
    ISSN: 0044-2313
    Schlagwort(e): Copper ; lead ; oxide ; preparation ; structure ; Chemistry ; Inorganic Chemistry
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Beschreibung / Inhaltsverzeichnis: Synthesis and Structure of the First Ternary Lead(II) Copper(I) Oxide: PbCu2O2PbCu2O2 can be prepared by solid state reaction or by precipitation from a basic aqueous solution. Single crystals of the new compound were prepared by recrystallisation from a molten mixture (PbO—Cu2O) and investigated by X-ray diffractometer technique. PbCu2O2 crystallizes isotypically with the homologue silver compound PbAg2O2 (monoclinic with a = 8.223 Å, b = 8.289 Å, c = 6.015 Å, β = 132.62°, Z = 4, space group C2h6—C 1 2/c 1). The crystallographic data from the X-ray investigation are reported. The structure is built by endless ∞1[PbO4/4]- and ∞1[CuO2/4]-chains. Pb2+ has a one-sided asymmetric coordination with four next oxygen neighbours and Cu+ forms a stretched dumbbell with two oxygen atoms.
    Notizen: PbCu2O2 kann durch Feststoffreaktion oder aus alkalischer, wässeriger Lösung erhalten werden. Einkristalle der neuen Verbindung wurden aus einer erstarrten Oxidschmelze (PbO—Cu2O) präpariert und mit Vierkreisdiffraktometertechnik röntgenographisch untersucht. PbCu2O2 ist isotyp mit der homologen Silberverbindung PbAg2O2 (monoklin mit a = 8,223 Å, b = 8,289 Å, c = 6,015 Å, β = 132,62°, Z = 4; Raumgruppe C2h6—C 1 2/c 1). Die kristallographischen Daten der Röntgenstrukturanalyse werden mitgeteilt. Die Kristallstruktur ist durch ∞1[PbO4/4]- und ∞1[CuO2/4]-Ketten charakterisiert. Pb2+ hat eine einseitige Koordination mit vier nächsten Sauerstoffnachbarn. Cu+ bildet mit zwei Sauerstoffatomen eine gestreckte Hantel.
    Zusätzliches Material: 3 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/zaac.19946200727
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