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  • 1
    Electronic Resource
    Electronic Resource
    Synthesis and characterization of technetium(V) complexes with N-(thiocarbamoyl)benzamidines. X-ray crystal structure of bis[N-(N,N-diethylthiocarbamoyl)benzamidinato]oxotechnetium(V) chloride, [TcO(et2tcb)2]Cl (1989)
    s.l. : American Chemical Society
    Inorganic chemistry 28 (1989), S. 834-839 
    Details
    ISSN: 1520-510X
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ic00304a008
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  • 2
    Electronic Resource
    Electronic Resource
    Soil properties and distributions of invertebrates and bacteria from King George Island (Arctowski Station), maritime Antarctic (1997)
    Springer
    Polar biology 18 (1997), S. 295-304 
    Details
    ISSN: 1432-2056
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Soils of the Admiralty Bay region at King George Island, maritime Antarctic are described and analysed for invertebrates and microorganisms. Results showed a great variety of soils: cambisols, umbrisols, regosols, podzols, leptosols, gleysols and relic ornithogenic soils were found. Surface layers, especially of cambisols, umbrisols and podzols, showed a diverse fauna, governed by nematodes, collemboles and mites. The bacterial flora is analysed for total counts and biomass distribution in different layers using epifluorescence microscopy. Influences of soil organic matter can be described by different patterns of mean bacterial cell volumes related to soil cover and depth distributions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003000050191
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  • 3
    Electronic Resource
    Electronic Resource
    Molekülstruktur, elektrochemisches verhalten und NK XANES von 1,4-Bis(pyrrol-1-yl-carbonyl)benzol (1997)
    Springer
    Monatshefte für Chemie 128 (1997), S. 217-224 
    Details
    ISSN: 1434-4475
    Keywords: 1,4-bis(pyrrol-1-yl-carbonyl)benzene ; Synthesis ; Molecular structure ; Cyclovoltammetry ; NK XANES
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Summary The molecular structure and the cyclovoltammetric behaviour of 1,4-bis(pyrrol-1-yl-carbonyl)benzene (1) are described. The X-ray absorption spectrum of1 (NK XANES) is investigated with respect to the N1s → π* transitions in comparison with 1H-pyrrole.
    Notes: Zusammenfassung Die Molekülstruktur und das cyclovoltammetrische Verhalten von 1,4-Bis-(pyrrol-1-yl-carbonyl)benzol (1) werden beschrieben. Das Röntgenabsorptionsspektrum von1 (NK XANES) wird bezüglich der N1s → π*-Übergänge im Vergleich mit 1H-Pyrrol untersucht.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00807887
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  • 4
    Electronic Resource
    Electronic Resource
    Structure of two modifications of 1,1-diethyl-3-thiobenzoylthiourea (1987)
    Oxford [u.a.] : International Union of Crystallography (IUCr)
    Acta crystallographica 43 (1987), S. 92-95 
    Details
    ISSN: 1600-5759
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0108270187096884
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  • 5
    Electronic Resource
    Electronic Resource
    Structure of N-(diethylaminothiocarbonyl)benzamidine (1988)
    Oxford [u.a.] : International Union of Crystallography (IUCr)
    Acta crystallographica 44 (1988), S. 355-357 
    Details
    ISSN: 1600-5759
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S010827018700595X
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  • 6
    Electronic Resource
    Electronic Resource
    The impact of a low humus level in arable soils on microbial properties, soil organic matter quality and crop yield (1999)
    Springer
    Biology and fertility of soils 28 (1999), S. 156-161 
    Details
    ISSN: 1432-0789
    Keywords: Key words Soil cultivation ; Carbon loss ; Microbial biomass ; Enzyme activities ; Soil organic matter quality
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Geosciences , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract  In arable soils in Schleswig-Holstein (Northwest Germany) nearly 30% of the total organic C (TOC) stored in former times in the soil has been mineralized in the last 20 years. Microbial biomass, enzyme activities and the soil organic matter (SOM) composition were investigated in order to elucidate if a low TOC level affects microbial parameters, SOM quality and crop yield. Microbial biomass C (Cmic) and enzyme activities decreased in soils with a low TOC level compared to soils with a typical TOC level. The decrease in the Cmic/TOC ratio suggested low-level, steady-state microbial activity. The SOM quality changed with respect to an enrichment of initial litter compounds in the top soil layers with a low TOC level. Recent management of the soils had not maintained a desirable level of humic compounds. However, we found no significant decrease in crop yield. We suggest that microbial biomass and dehydrogenase and alkaline phosphatase activities are not necessarily indicators of soil fertility in soils with a high fertilization level without forage production and manure application.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003740050478
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  • 7
    Electronic Resource
    Electronic Resource
    S-(N-(Thiocarbamoyl)benzimido)-dithiocarbamidsäureester (1996)
    Springer
    Monatshefte für Chemie 127 (1996), S. 291-296 
    Details
    ISSN: 1434-4475
    Keywords: S-(N-(Thiocarbamoyl)benzimido)dithiocarbamic esters ; Synthesis ; 13C NMR spectroscopy ; Side reactions
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Summary The synthesis of the title compounds3 (R 1=R 2=C2H5;n-C4H9) by reactions of N-(N′,N′-diethylthiocarbamoyl)benzimidechloride (2) with sodiumdialkyldithiocarbamates (1) in acetone is described. The low yields (〈25%) are caused by the occurrence of side reactions. The structures of the compounds were confirmed by IR,1H and13C NMR, and mass spectroscopy. Side reactions were detected by13C NMR spectroscopy; the results are discussed.
    Notes: Zusammenfassung Die Synthese der Titelverbindungen3 (R 1=R 2=C2H5;n-C4H9) durch Reaktionen von N-(N′,N′-Diethylthiocarbamoyl)-benzimidoylchlorid (2) mit Natriumdialkyldithiocarbamaten (1) in Aceton wird beschrieben. Die niedrigen Ausbeuten (bis 25% d.Th.) sind durch Nebenreaktionen bedingt. Die Strukturen der Verbindungen werden durch IR-,1H-NMR-,13C-NMR-und Massenspektren bestätigt. Nebenreaktionen werden13C-NMR-spektroskopisch verfolgt und die Ergebnisse diskutiert.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00813794
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  • 8
    Electronic Resource
    Electronic Resource
    Soil organic matter composition and pesticide bonding in sandy soils in relation to groundwater protection in the Northwest German Lower Plain (1996)
    Springer
    Biology and fertility of soils 23 (1996), S. 266-272 
    Details
    ISSN: 1432-0789
    Keywords: Key words Soil organic matter ; Microbial activity ; Groundwater contamination ; Pesticides ; Spodic horizons ; Landscape planning
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Geosciences , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract In sandy gleyic soils with a low groundwater table under arboriculture in Northwest Germany, a wide variation of groundwater pollution by pesticides has been observed. We therefore examined data on microbial activity and soil organic matter composition by wet chemistry, cross-polarization magic-angle spinning and 13C nuclear magnetic resonance, and pyrolysis–field ionization mass spectromy. However, neither microbial activity nor the soil organic matter composition of cultivated topsoils explained the differences in xenobiotic leaching into the groundwater. Data from Anthrosols suggested that these soils have a higher capacity for pesticide bonding because of high amounts of aromatic and carboxylic C moieties in the soil organic matter. However, despite the same pesticide inputs and time of application, the leached output from these soils was higher than that from the Podzols. Initial data from subsoil investigations suggest that the presence of a spodic horizon most likely reduces groundwater pollution by pesticides. Studies to assess fixation capacity and desorption kinetics in Bh horison seem warranted.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00335954
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  • 9
    Electronic Resource
    Electronic Resource
    Soil organic matter composition and pesticide bonding in sandy soils in relation to groundwater protection in the Northwest German Lower Plain (1996)
    Springer
    Biology and fertility of soils 23 (1996), S. 266-272 
    Details
    ISSN: 1432-0789
    Keywords: Soil organic matter ; Microbial activity ; Groundwater contamination ; Pesticides ; Spodic horizons ; Landscape planning
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Geosciences , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract In sandy gleyic soils with a low groundwater table under arboriculture in Northwest Germany, a wide variation of groundwater pollution by pesticides has been observed. We therefore examined data on microbial activity and soil organic matter composition by wet chemistry, cross-polarization magic-angle spinning and 13C nuclear magnetic resonance, and pyrolysis-field ionization mass spectromy. However, neither microbial activity nor the soil organic matter composition of cultivated topsoils explained the differences in xenobiotic leaching into the groundwater. Data from Anthrosols suggested that these soils have a higher capacity for pesticide bonding because of high amounts of aromatic and carboxylic C moieties in the soil organic matter. However, despite the same pesticide inputs and time of application, the leached output from these soils was higher than that from the Podzols. Initial data from subsoil investigations suggest that the presence of a spodic horizon most likely reduces groundwater pollution by pesticides. Studies to assess fixation capacity and desorption kinetics in Bh horison seem warranted.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00335954
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    Paper (German National Licenses)
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  • 10
    Electronic Resource
    Electronic Resource
    Preconcentration and voltammetric behaviour of Ag+ at carbon paste electrodes modified by N-benzoyl-N′,N′-di-i-butyl-thiourea (1996)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 356 (1996), S. 263-266 
    Details
    ISSN: 1618-2650
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The preconcentration of silver at carbon paste electrodes (CPE) modified with N-benzoyl-N′,N′-di-i-butyl-thiourea and its subsequent voltammetric determination is studied with test solutions. The preconcentration of silver at the surface of the modified CPE succeeds as well with open circuits as with applied potentials. The amount preconcentrated depends on the electrode potential with a maximum at +0.1 V vs. Ag/AgCl, thus enabling the preconcentration of silver without cathodic treatment. The detection limit is in the order of 10–4 mmol/l Ag+. The surface reactions during the preconcentration are discussed. It is assumed that silver complexes of the modifier are formed in a fast reaction followed by a slow reaction with participation of silver and of carbon surface groups.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s0021663560263
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