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  • 1
    Electronic Resource
    Electronic Resource
    Chemical modification of the small intestinal Na^+/d-glucose cotransporter by amino group reagents - Evidence for a role of amino group(s) in the binding of the sugar
    Amsterdam : Elsevier
    Biochimica et Biophysica Acta (BBA)/Biomembranes 731 (1983), S. 437-447 
    Details
    ISSN: 0005-2736
    Keywords: (Rabbit small intestine) ; Amino group ; Chemical modification ; Cotransport ; Glucose transport ; Na^+ transport ; Phlorizin binding ; Substrate-binding site
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology , Medicine , Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0005-2736(83)90039-1
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  • 2
    Electronic Resource
    Electronic Resource
    Small-intestinal Na^+/d-glucose cotransport. Inactivation of sugar transport and phlorizin binding by thiol-group and amino-group reagents
    Amsterdam : Elsevier
    Biochimica et Biophysica Acta (BBA)/Biomembranes 728 (1983), S. 429-437 
    Details
    ISSN: 0005-2736
    Keywords: (Rabbit brush border) ; Amino group ; Chemical modification ; Cotransport ; Na^+/glucose transport ; Phlorizin binding ; Sulfhydryl group
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology , Medicine , Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0005-2736(83)90515-1
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Structure of adenovirus chromatin
    Amsterdam : Elsevier
    Biochimica et Biophysica Acta (BBA)/Gene Structure and Expression 696 (1982), S. 76-86 
    Details
    ISSN: 0167-4781
    Keywords: (Adenovirus) ; Chromatin ; Electron microscopy ; Nuclease digestion
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology , Medicine , Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0167-4781(82)90012-4
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  • 4
    Electronic Resource
    Electronic Resource
    Detection of high concentration of Mg and Ca in the nematocysts of various cnidarians (1987)
    Springer
    Cellular and molecular life sciences 43 (1987), S. 1022-1025 
    Details
    ISSN: 1420-9071
    Keywords: Calcium ; magnesium ; nematocysts ; Hydra ; Cnidaria
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary An X-ray spectral analysis (EDAX) of isolated undischarged nematocysts of various cnidarians (Hydrozoa, Scyphozoa, Anthozoa) revealed the presence of extremely high concentrations of divalent cations. InHydra nematocysts both Ca2+ (conc. 0.36 μmole/mg dry cysts) and Mg2+ (conc. 0.80 μmole/mg dry cysts) ions add up to a total in situ concentration of 0.5 to 1.0 M. More than 85% of the cations, which are believed to be involved in cyst discharge, are contained in the soluble fraction of the cysts, where they must be bound to high molecular weight molecules.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01952227
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  • 5
    Electronic Resource
    Electronic Resource
    Bradyrhizobium japonicum mutants defective in root-nodule bacteroid development and nitrogen fixation (1986)
    Springer
    Archives of microbiology 144 (1986), S. 355-366 
    Details
    ISSN: 1432-072X
    Keywords: Bradyrhizobium ; Electron microscopy ; Mutants ; Nitrogen fixation ; Nodulation ; Soybean ; Symbiosis ; Transposon Tn5
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The genome of the slow-growing Bradyrhizobium japonicum (strain 110) was mutagenized with transposon Tn5. A total of 1623 kanamycin/streptomycin resistant derivatives were screened in soybean infection tests for nodulation (Nod) and symbiotic nitrogen fixation (Fix). In this report we describe 14 strains possessing a stable, reproducible Nod+Fix- phenotype. These strains were also grown under microaerobic culture conditions to test them for free-living nitrogen fixation activity (Nif). In addition to strains having reduced Fix and Nif activities, there were also strains that had reduced symbiotic Fix activity but were Nif+ ex planta. Analysis of the genomic structure revealed that the majority of the strains had a single Tn5 insertion without any further apparent physical alteration. A few strains had additional insertions (by Tn5 or IS50), or a deletion, or had cointegrated part of the vector used for Tn5 mutagenesis. One of the insertions was found in a known nif gene (nifD) whereas all other mutations seem to affect different, hitherto unknown genes or operons. Several mutant strains had an altered nodulation phenotype, inducing numerous, small, widely distributed nodules. Light and electron microscopy revealed that most of these mutants were defective in different stages of bacteroid development and/or bacteroid persistence. The protein patterns of the mutants were inspected by two-dimensional gel electrophoresis after labelling microaerobic cultures with l-(35S)methionine. Of particular interest were mutants lacking a group of proteins the synthesis of which was known to be under oxygen control. Such strains can be regarded as potential regulatory mutants.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00409885
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  • 6
    Electronic Resource
    Electronic Resource
    Density functional calculations of the structures and bond energies of Cr(CO)6 and (η6-C6H6) Cr(CO)2(CX) (X=O, S) complexes (1995)
    Springer
    Theoretical chemistry accounts 91 (1995), S. 157-167 
    Details
    ISSN: 1432-2234
    Keywords: Density functional theory ; Metal-ligand bond energies ; Chromium ; Arene complexes ; Chalcocarbonyls
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary Quantum chemical calculations based on density functional theory have been performed on Cr(CO)6, (η6-C6H6)Cr(CO)3 and (η6-C6H6)Cr(CO)2(CS) at the local and nonlocal level of theory using different functionals. Good agreement is obtained with experiment for both optimized geometries and metal-ligand binding energies. In particular, a comparison of metal-arene bond energies calculated for the (η6-C6H6)Cr(CO)3 and (η6-C6H6)Cr(CO)2(CS) complexes correlates well with kinetic data demonstrating that substitution of one CO group by CS leads to an important labilizing effect of this bond, which may be primarily attributed to a larger π-backbonding charge transfer to the CS ligand as compared with CO.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01114983
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  • 7
    Electronic Resource
    Electronic Resource
    Effect of gallopamil on energy metabolism of the isolated perfused rat brain in the postischemic period (1985)
    Springer
    Naunyn-Schmiedeberg's archives of pharmacology 329 (1985), S. 451-454 
    Details
    ISSN: 1432-1912
    Keywords: Gallopamil ; Brain energy metabolism ; Calcium ; Isolated perfused rat brain
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The isolated perfused rat brain was used to demonstrate an effect of gallopamil on energy metabolism affected by ischemia. After a perfusion period of 30 min and 10 min of ischemia the isolated brain preparation was reperfused. From the onset of perfusion onwards, gallopamil (1 or 10 μmol/l) was present in the medium. The higher concentration of gallopamil accelerated significantly the restoration of the high-energy phosphates in the recovery stage: after 2 min of recirculation the ATP and the creatine-P levels were higher and the AMP level was lower in cortical tissue of drug-treated brains than in untreated controls. These results suggest that gallopamil protected brain energy metabolism against ischemic damage.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00496381
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  • 8
    Electronic Resource
    Electronic Resource
    Density functional calculations of the structures and bond energies of Cr(CO)6 and (η6-C6H6)Cr(CO)2(CX) (X=O, S) complexes (1995)
    Springer
    Theoretica chimica acta 91 (1995), S. 157-167 
    Details
    ISSN: 0040-5744
    Keywords: Key words: Density functional theory ; Metal-ligand bond energies ; Chromium ; Arene complexes ; Chalcocarbonyls
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary.  Quantum chemical calculations based on density functional theory have been performed on Cr(CO)6, (η6-C6H6)Cr(CO)3 and (η6-C6H6)Cr(CO)2(CS) at the local and nonlocal level of theory using different functionals. Good agreement is obtained with experiment for both optimized geometries and metal–ligand binding energies. In particular, a comparison of metal–arene bond energies calculated for the (η6-C6H6)Cr(CO)3 and (η6-C6H6)Cr(CO)2(CS) complexes correlates well with kinetic data demonstrating that substitution of one CO group by CS leads to an important labilizing effect of this bond, which may be primarily attributed to a larger π-backbonding charge transfer to the CS ligand as compared with CO.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01114983
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    Paper (German National Licenses)
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