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  • 1990-1994  (34)
  • 1985-1989  (30)
  • 1975-1979  (29)
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  • 1
    Electronic Resource
    Electronic Resource
    Chemisorption and surface reactions of molecular deuterium and hydrocarbons on the rhenium(0001) single-crystal surface clean and in the presence of co-adsorbed sulfur or carbon (1987)
    s.l. : American Chemical Society
    The @journal of physical chemistry 〈Washington, DC〉 91 (1987), S. 5695-5705 
    Details
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/j100306a037
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  • 2
    Electronic Resource
    Electronic Resource
    Mutagenesis, cloning and complementation analysis of C4-dicarboxylate transport genes from Rhodobacter capsulatus (1990)
    Oxford, UK : Blackwell Publishing Ltd
    Molecular microbiology 4 (1990), S. 0 
    Details
    ISSN: 1365-2958
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Medicine
    Notes: Transposon mutagenesis was used to isolate insertion mutants of the photosynthetic bacterium Rhodobacter capsulatus which were unable to grow under aerobic conditions in the dark on malate, succinate or fumarate as sole carbon sources. Of five mutants isolated, all were deficient in C4-dicarboxylate transport. However, these mutants were still capable of photoheterotrophic growth, although at a slower rate than the wild type, on malate and succinate (but not fumarate). The mutated locus (designated dct) was complemented in trans using a cosmid gene bank. Subcloning and complementation analysis indicated that at least three closely linked genes essential for aerobic dicarboxylate transport were contained within an 8.3kb region of the Rhodobacter capsulatus chromosome.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2958.1990.tb02068.x
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  • 3
    Electronic Resource
    Electronic Resource
    Purification, characterization and nucleotide sequence of the periplasmic C4-dicarboxylate-binding protein (DctP) from Rhodobacter capsulatus (1991)
    Oxford, UK : Blackwell Publishing Ltd
    Molecular microbiology 5 (1991), S. 0 
    Details
    ISSN: 1365-2958
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Medicine
    Notes: A periplasmic binding protein essential for high-affinity transport of the C4-dicarboxylates malate, succinate and fumarate across the cytoplasmic membrane of the purple photosynthetic bacterium Rhodobacter capsulatus has been purified to homogeneity and some of its ligand-binding properties characterized. The protein was not produced in a Tn5 insertion mutant unable to transport C4-dicarboxylates under aerobic conditions in the dark. Wild-type DNA corresponding to the location of the transposon insertion site was subcloned and a 1.5kb section sequenced. A complete open reading frame of 999bp was identified that encoded a 333-residue protein (DctP) with a molecular weight of 36 128 with a 26-residue amino-terminal signal peptide. The identity of this protein with the purified dicarboxylate-binding protein and the position of the predicted signal peptide cleavage site was confirmed by N-terminal sequencing. No significant homology with other proteins was detected in database searches. A GC-rich region of dyad symmetry was located 7bp downstream of the dctP translational stop codon. This structure may be of significance in regulating the relative abundance of DctP and other dct gene products which comprise the high-affinity dicarboxylate transport system in this bacterium.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2958.1991.tb01865.x
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  • 4
    Electronic Resource
    Electronic Resource
    Effect of lytic peptides on selected fish bacterial pathogens (1990)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of fish diseases 13 (1990), S. 0 
    Details
    ISSN: 1365-2761
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Medicine
    Notes: Abstract. Two synthetic lytic peptides, derivatives of the naturally occurring lytic peptide cecropin B, were tested for their effect on eight pathogenic fish bacteria. All bacteria were grown on tryptic soy agar at 30°C. Four levels (dilutions) of lytic peptides were incubated with viable cells in the log phase for 1 h. Standard plate counts were made after 24±2h with control plates (no toxin) representing 100% survival. Significant differences (P〈0.05) in the toxicity of the two peptides were found for six out of eight bacterial pathogens. Peptide concentration or dilution level also caused significant difference (P〈0.01) in bacterial counts. Peptide type by dilution level interactions were significant (P〈0.01) for only two bacterial pathogens. The LD50. in molar concentrations of the lytic peptides on the bacterial pathogens, ranged from approximately 10−6 to 10−9. The possible role of utilizing these peptides to enhance disease resistance in aquaculture is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2761.1990.tb00788.x
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  • 5
    Electronic Resource
    Electronic Resource
    Optimization of bioassay conditions for the olive bark beetle Phloeotribus scarabaeoides (1992)
    Springer
    Entomologia experimentalis et applicata 63 (1992), S. 81-86 
    Details
    ISSN: 1570-7458
    Keywords: Laboratory bioassay ; olfactometer ; olive bark beetle ; Phloeotribus scarabaeoides ; Coleoptera ; Scolytidae
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Bioassay conditions with a glass olfactometer for the olive bark beetle, Phloeotribus scarabaeoides Bern. (Coleoptera: Scolytidae), have been investigated. The best temperatures and light intensities were between 17 and 28° C and 1000 and 1500 lux, respectively. The best response was obtained with newly emerged individuals from reproduction galleries with no feeding period.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00350349
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  • 6
    Electronic Resource
    Electronic Resource
    Differences in the cytochrome P-450 enzymes of sterol C-14 demethylase mutants of Saccharomyces cerevisiae (1985)
    Springer
    Current genetics 10 (1985), S. 261-267 
    Details
    ISSN: 1432-0983
    Keywords: Cytochrome P-450 ; S. cerevisiae ; Sterol mutants ; Nystatin ; resistance
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary A number of nystatin-resistant strains of S. cerevisiae have been isolated which are defective in lanosterol C-14 demethylation, a reaction normally catalysed by cytochrome P-450. In this paper two of these strains have been compared and found to have differences in their reduced-CO difference spectra indicating different distortions in the enzyme molecule. Nystatin resistance in the C-14 demethylation deficient SG1 in shown to be determined by a single gene, and a sterol 5,6-desaturase defect does not appear to be required for viability of SG1, was reported for the C-14 demethylase deficient isolate JR4 by Taylor et al. (1983). There are at least two discernable mutant phenotypes for the yeast cytochrome P-450 structural gene which give a C-14 demethylase defect.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00365622
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  • 7
    Electronic Resource
    Electronic Resource
    Phylogenetic relationships reveal recombination among isolates of cauliflower mosaic virus (1994)
    Springer
    Journal of molecular evolution 39 (1994), S. 496-505 
    Details
    ISSN: 1432-1432
    Keywords: Caulimovirus ; Pararetroviruses ; Recombination ; Reverse transcription ; Viral isolates
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Isolates of cauliflower mosaic virus (CaMV) differ in host range and symptomatology. Knowledge of their sequence relationships should assist in identifying nucleotide sequences responsible for isolate-specific characters. Complete nucleotide sequences of the DNAs of eight isolates of CaMV were aligned and the aligned sequences were used to analyze phylogenetic relationships by maximum likelihood, bootstrapped parsimony, and distance methods. Isolates found in North America clustered separately from those isolated from other parts of the world. Additional isolates, for which partial sequences were available, were incorporated into phylogenetic analysis of the sequences of genome segments corresponding to individual protein coding regions or the large intergenic region of CaMV DNA. The analysis revealed several instances where the position of an isolate on a tree for one coding region did not agree with the position of the isolate on the tree for the complete genome or with its position on trees for other coding regions. Examination of the distribution of shared residue types of phylogenetically informative positions in anomalous regions suggested that most of the anomalies were due to recombination events during the evolution of the isolates. Application of an algorithm that searches for segments of significant length that are identical between pairs of isolates or contain a significantly high concentration of polymorphisms suggested two additional recombination events between progenitors of the isolates studied and an event between the XinJing isolate and a CaMV not represented in the data set. An earlier phylogenetic origin for CaMV than for carnation etched ring virus, the caulimovirus used as outgroup in these analyses, was deduced from the position of the outgroup with North American isolates in some trees, but with non-North American isolates in other trees.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00173419
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  • 8
    Electronic Resource
    Electronic Resource
    Three forms of (triphenylarsine)diiodine: two polymorphs of C18H15AsI2 and a 1:3/2 toluene solvate C18H15AsI2.3/2C7H8 (1988)
    Oxford [u.a.] : International Union of Crystallography (IUCr)
    Acta crystallographica 44 (1988), S. 38-41 
    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/S0108270187008916
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  • 9
    Electronic Resource
    Electronic Resource
    Effect of food ingestion on nifedipine absorption and haemodynamic response (1985)
    Springer
    European journal of clinical pharmacology 28 (1985), S. 105-107 
    Details
    ISSN: 1432-1041
    Keywords: nifedipine ; myocardial infarction ; plasma concentration ; haemodynamics ; meal effect
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Notes: Summary The absorption of nifedipine (10 mg) and haemodynamic response were studied in 10 patients with myocardial infarction before (Phase A) and after (Phase B) a standardized breakfast. In Phase A, the peak nifedipine concentration (Cmax) and maximum haemodynamic changes were found 1 h after drug administration. In Phase B, the Cmax was lower than that in phase A (43±6 vs 136±23 ng/ml,p〈0.001), and both Cmax and maximum haemodynamic changes were delayed to the fourth hour after administration. Nifedipine plasma concentration correlated significantly with the percent changes in systolic and diastolic blood pressure and heart rate. This study suggests that not only dose but also the time intervals between nifedipine administration and food intake are important in determining the haemodynamic effects.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00635716
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  • 10
    Electronic Resource
    Electronic Resource
    Heterotrophic growth of Thiobacillus A2 on sugars and organic acids (1977)
    Springer
    Archives of microbiology 113 (1977), S. 257-264 
    Details
    ISSN: 1432-072X
    Keywords: Thiobacillus A2 ; Facultative heterotrophy ; Diauxic growth ; Sugar metabolism
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Thiobacillus A2 grew on a number of organic acids, pentoses, hexoses and α-linked disaccharides, but not on β-linked disaccharides or galactosides. Growth was slow on glucose, although fast-growing strains were selectively isolated. Additive growth rates occurred on glucose and galactose; growth on glucose with fructose, pyruvate or gluconate was biphasic rather than diauxic; fructose was used preferentially over glucose; slow growth on glucose was accelerated by some disaccharides; growth on acetate, fumarate or succinate with glucose gave diauxic growth with preferential use of the acid and repression of glucose incorporation. Acetate and succinate tended to be used preferentially even with cultures grown on them in mixture with fructose or sucrose.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00492033
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