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  • 1
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Archives of Biochemistry and Biophysics 251 (1986), S. 616-623 
    ISSN: 0003-9861
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Oxford, UK and Boston, USA : Blackwell Publishers Ltd.
    Journal of management studies 39 (2002), S. 0 
    ISSN: 1467-6486
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Economics
    Notes: In this paper, we extend the resource-based theory of the firm to show that it can be used to analyse the effectiveness of competitive strategies. Specifically, we demonstrate that political strategies aimed at raising rivals’ costs by blocking the use of substitute resources may create the opportunity for a firm to capitalize on resources that are valuable, rare, and costly to imitate. The uses of political activity to block the availability of substitute resources are discussed in detail and examples are provided to demonstrate how such strategies are used and to illustrate how successful they may be. This is an important extension of the resource-based theory because it demonstrates how the theory can be applied by researchers and practitioners.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Analytical chemistry 60 (1988), S. 2478-2482 
    ISSN: 1520-6882
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Analytical chemistry 61 (1989), S. 928-928 
    ISSN: 1520-6882
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 200 (1963), S. 889-889 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Ethylene at high concentrations induced a change in unsaturated lipid material in the endodermis and phloem, and negative reactions were obtained for cytochrome oxidase, peroxidase, and some dehydrogenases and esterases. Leaves of narcissus bulbs grown in an ethylene atmosphere had a redistribution ...
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Journal of industrial microbiology and biotechnology 19 (1997), S. 98-103 
    ISSN: 1476-5535
    Keywords: Keywords: Rhodobacter sphaeroides; selenate; selenite; reduction; methylation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Rhodobacter sphaeroides 2.4.1 exposed to selenate or selenite produced volatile selenium compounds. Total amounts of dimethyl selenide, dimethyl diselenide, dimethyl sulfide and dimethyl disulfide in culture medium and headspace were determined. The highest selenate volatilization occurred in the late stationary phase of growth. However, cultures deprived of light in the stationary phase of growth produced much less of the volatile organo-selenium compounds. Lower culture pHs increased the rate of selenium volatilization. Low sulfate concentration limited biomass production and selenium volatilization; high sulfate concentrations had an enhancing effect on the release of organo-selenium compounds. Cultures of R. sphaeroides reacted very differently to amendments with increasing amounts of selenate and selenite. Only small amounts of selenite were volatilized; meanwhile high amounts of methylated selenides were found in selenate-poisoned cultures.
    Type of Medium: Electronic Resource
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  • 7
    ISSN: 1476-5535
    Keywords: Keywords: biological control; veliger stage; zebra mussel (Dreissena polymorpha); molluscicidal strains of Bacillus; Gramicidin S; Gramicidin D; Biomphalaria glabrata; schistosomiasis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Applications of Final Whole Culture (FWC) or primary powder material from strains of each of four Bacillus species (B. alvei, B. brevis, B. circulans, B. laterosporus) used singly, as well as the antibiotics Gramicidin S (GS) and Gramicidin D (GD) used singly, were found to be molluscicidal against several life cycle stages of the zebra mussel Dreissena polymorpha. Combinations of the bacterial material with either GS or GD were either additive (for GS) or antagonistic (for GD). The smaller the life cycle stage of the animal, the more sensitive it was to either the bacterial or antibiotic agent. The veliger stage was particularly sensitive to each agent, with the molluscicidal effect being more rapid in the veliger (5 h) than in the adult (6 days). The molluscicidal effects of these agents (at 1–100 μ g ml−1) against the veliger stages of the zebra mussel were comparable to the activity of B. thuringiensis and B. sphaericus against their target organisms. These agents used singly were also active against small adult Biomphalaria glabrata, the snail vector of schistosomiasis (eg at tenths of μ g ml−1 of GS).
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  • 8
    ISSN: 1432-1327
    Keywords: Selenomethionine ; Selenocysteine ; Selenocystine ; X-ray absorption spectroscopy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 57 (1977), S. 77-86 
    ISSN: 0003-3146
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Polyblend-Kautschuke, bestehend aus auf EPDM aufgepfropftem Styrol, Acrylnitril oder Methylmethacrylat, sind geeignete Modifikatoren der Schlagzähigkeit von PVC. Die ungealterten Schlagzähigkeiten von PVC-Massen bestimmter Zusammensetzung und von PVC-Massen mit gleicher Konzentration an handelsüblichen Modifiziermitteln wie z. B. ABS, Polyacrylat und chloriertem Polyäthylen sind fast identisch. Es folgt ein Vergleich der Modifizierungswirksamkeit und Wetterbeständigkeit der Modifiziermittel auf der Basis von EPDM mit solchen aus ABS, Polyacrylat und chloriertem Polyäthylen.
    Notes: Graft polyblends of styrene, acrylonitrile or methyl methacrylate with EPDM rubbers are PVC impact modifiers. Specific compositions in PVC composites have unaged impact strengths similar to PVC composites with commercial ABS, polyacrylate, and chlorinated polyethylene modifiers at equivalent concentrations. Modifier efficiency and weatherability of the EPDM based modifiers are compared to ABS, polyacrylate, and chlorinated polyethylene.
    Additional Material: 6 Tab.
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    New York, NY [u.a.] : Wiley-Blackwell
    Applied Organometallic Chemistry 11 (1997), S. 471-483 
    ISSN: 0268-2605
    Keywords: organoantimony ; trimethylstibine ; trimethylantimony ; biomethylation ; antimonyltartrate ; hexahydroxyantimonate ; Pseudomonas fluorescens ; Chemistry ; Industrial Chemistry and Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: We have evidence that an organic and an inorganic salt of antimony were reduced and methylated biologically by microorganisms in laboratory experiments. The organoantimony compound produced was trimethylstibine [(CH3)3Sb] and was detected in a culture headspace. This was confirmed by matching the compound's retention time in capillary gas chromatography, as detected by fluorine-induced chemiluminescence, with a com- mercial standard and by its mass spectrum determined with gas chromatography/ mass spectrometry (GC-MS). (CH3)3Sb was detected in the headspace of soil samples amended with either potassium antimonyltartrate or potassium hexahydroxyantimonate and augmented with any one of three different nitrate-containing growth media. The identity of the microorganisms in soil that accomplished this are as yet unknown. Of 48 soil samples amended with these two compounds, 24 produced trimethylstibine. Bioreduction of trimethyldibromoantimony was also detected in a liquid monoculture of Pseudomonas fluorescens K27 which also produced tri- methylstibine. This headspace production of (CH3)3Sb was determined to be linked to the culture's cell population as measured by optical density. This microbe, however, did not biomethylate either potassium antimonyltartrate or potassium hexahydroxyantimonate in any experiments we performed. © 1997 John Wiley & Sons, Ltd.
    Additional Material: 4 Ill.
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