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  • 1
    Electronic Resource
    Electronic Resource
    If Colin Powell had Commanded Enron: The Hidden Foundation of Leadership (2004)
    Oxford, UK : Blackwell Publishing Ltd
    Business strategy review 15 (2004), S. 0 
    Details
    ISSN: 1467-8616
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Economics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.0955-6419.2004.00312.x
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  • 2
    Electronic Resource
    Electronic Resource
    Contradictions and Dialectics: Reshaping Political Space in Israel/Palestine. An Indirect Response to Lina Jamoul (2004)
    Oxford, UK and Boston, USA : Blackwell Publishing Ltd
    Antipode 36 (2004), S. 0 
    Details
    ISSN: 1467-8330
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geography
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1467-8330.2004.00439.x
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  • 3
    Electronic Resource
    Electronic Resource
    Radial patterns of xylem sap flow in non-, diffuse- and ring-porous tree species (1996)
    Oxford, UK : Blackwell Publishing Ltd
    Plant, cell & environment 19 (1996), S. 0 
    Details
    ISSN: 1365-3040
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: We investigated radial patterns of sap flux density and wood properties in the sapwood of young loblolly pine (Finns taeda L.), mature white oak (Quercus alba L.) and sweetgum (Liquidambar styraciflua L.), which represent three major classes of wood anatomy: non-porous (coniferous), ring-porous and diffuse-porous. Radial measurements of xylem sap flux density were made in sections of xylem extending to 20 mm and 20–40 mm from the cambium. These measurements were compared with measurements of the relative water content (Rs) and sapwood specific gravity (ρr) of corresponding radial sections. In both hardwood species, sap flow differences were rarely significant between the two depth intervals. In pine, a 59% reduction in daily sap flux density from outer to inner sapwood was found. This could not be accounted for by a 3% drop in Rs; rather, an accompanying 9% reduction in ρr indicated a transition between the depth intervals from mature to juvenile sapwood, and is the probable cause of the lower flux rate in the inner xylem of pine.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-3040.1996.tb00463.x
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  • 4
    Electronic Resource
    Electronic Resource
    Sugar metabolism in the extremely halophilic bacterium Salinibacter ruber (2003)
    Oxford, UK : Blackwell Publishing Ltd
    FEMS microbiology letters 223 (2003), S. 0 
    Details
    ISSN: 1574-6968
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Growth of Salinibacter ruber, a red, extremely halophilic bacterium phylogenetically affiliated with the Flavobacterium/Cytophaga branch of the domain Bacteria, is stimulated by a small number of sugars (glucose, maltose, starch at 1 g l−1). Glucose consumption starts after other substrates have been depleted. Glucose metabolism proceeds via a constitutive, salt-inhibited hexokinase and a constitutive salt-dependent nicotinamide adenine dinucleotide phosphate (NADP)-linked glucose-6-phosphate dehydrogenase. Glucose dehydrogenase and fructose-1,6-bisphosphate aldolase activity could not be detected. It is therefore suggested that Salinibacter metabolizes glucose by the classic Entner–Doudoroff pathway and not by the Embden–Meyerhof glycolytic pathway or by the modified Entner–Doudoroff pathway present in halophilic Archaea of the family Halobacteriaceae, in which the phosphorylation step is postponed. However, activity of 2-keto-3-deoxy-6-phosphogluconate aldolase could not be detected in extracts of Salinibacter cells, whether or not grown in the presence of glucose.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/S0378-1097(03)00345-8
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  • 5
    Electronic Resource
    Electronic Resource
    Glycerol metabolism in the extremely halophilic bacterium Salinibacter ruber (2004)
    Oxford, UK : Blackwell Publishing Ltd
    FEMS microbiology letters 232 (2004), S. 0 
    Details
    ISSN: 1574-6968
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Growth of Salinibacter ruber, a red, extremely halophilic bacterium phylogenetically affiliated with the Flavobacterium/Cytophaga branch of the domain Bacteria, is stimulated by glycerol. In contrast to glucose consumption, which starts only after more easily degradable substrates present in yeast extract have been depleted, glycerol is consumed during the earliest growth phases. When U-14C-labeled glycerol was added to the culture, up to 25% of the radioactivity was incorporated by the cells. Glycerol kinase activity was detected only in cells grown in the presence of glycerol (up to 90 nmol mg protein−1 min−1). This enzyme functioned over salt concentrations from 0.6 to 2.8 M KCl. No significant activity of NAD-dependent glycerol dehydrogenase was found. It is suggested that Salinibacter may use glycerol as one of its principal substrates in its habitat, the saltern crystallizer ponds.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/S0378-1097(04)00077-1
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  • 6
    Electronic Resource
    Electronic Resource
    Typing of halophilic Archaea and characterization of their cell surface carbohydrates by use of lectins (1998)
    Oxford, UK : Blackwell Publishing Ltd
    FEMS microbiology letters 163 (1998), S. 0 
    Details
    ISSN: 1574-6968
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Lectins are important tools for cell typing and for the study of cell surface components. They have been widely used for the analysis of carbohydrates on the surface of many eukaryotic and prokaryotic cells, but they have not yet been exploited in the study of the halophilic Archaea (family Halobacteriaceae), because of the high salinity required for the structural integrity of these microorganisms. We have defined the salt concentration threshold high enough for survival of the Archaea, but sufficiently low for lectins to bind to them. Under these conditions we studied the interactions of a series of lectins, exhibiting different sugar specificities, with diverse halophilic Archaea. Concanavalin A was the most reactive by virtue of its glucose (and mannose) binding. The other lectins varied in their interactions. The results indicate that lectins might be useful probes for both archaeal typing and analysis of their cell surface carbohydrates.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1574-6968.1998.tb13031.x
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  • 7
    Electronic Resource
    Electronic Resource
    Mycosporine-2-glycine is the major mycosporine-like amino acid in a unicellular cyanobacterium (Euhalothece sp.) isolated from a gypsum crust in a hypersaline saltern pond (2002)
    Oxford, UK : Blackwell Publishing Ltd
    FEMS microbiology letters 208 (2002), S. 0 
    Details
    ISSN: 1574-6968
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Mycosporine-like amino acids (MAAs) were extracted from a unicellular cyanobacterium (Euhalothece sp.) isolated from a gypsum crust on the bottom of a hypersaline saltern pond in Eilat, Israel. When grown at high light intensities, this isolate contained high concentrations of two MAAs, one showing maximum optical density at 331 nm and one at 362 nm. The compound absorbing at 331 nm was purified by preparative high performance liquid chromatography, and its structure was elucidated by one-dimensional (1H and 13C) and two-dimensional nuclear magnetic resonance, mass spectrometry and amino acid analysis, and identified as mycosporine-2-glycine. This is the first report of mycosporine-2-glycine in cyanobacteria.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1574-6968.2002.tb11087.x
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  • 8
    Electronic Resource
    Electronic Resource
    Occurrence of two different glutamate dehydrogenase activities in the halophilic bacterium Salinibacter ruber (2003)
    Oxford, UK : Blackwell Publishing Ltd
    FEMS microbiology letters 226 (2003), S. 0 
    Details
    ISSN: 1574-6968
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Salinibacter ruber, an extremely halophilic member of the domain Bacteria, has two different cytoplasmic glutamate dehydrogenase activities, marked as GDHI and GDHII. GDHI showed a strong dependence on high salt concentrations for stability, but not for activity, displaying maximal activity in the absence of salts. GDHII depended on high salt concentrations for both activity and stability. It catalyzed amination of 2-oxoglutarate with optimal activity in 3 M KCl at pH 8. No activating effect was found when NaCl was replaced by KCl. Only GDHII displayed activity in the deamination reaction of glutamate with an optimal pH of 9.5. Both enzymes were activated by certain amino acids (l-leucine, l-histidine, l-phenylalanine) and by nucleotides such as ADP or ATP. A low-molecular-mass cytoplasmic fraction was found to be a highly effective activator of GDHII in the presence of high NaCl concentrations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/S0378-1097(03)00592-5
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  • 9
    Electronic Resource
    Electronic Resource
    A procedure for the enrichment and isolation of Halobacterium (1999)
    Oxford, UK : Blackwell Publishing Ltd
    FEMS microbiology letters 173 (1999), S. 0 
    Details
    ISSN: 1574-6968
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: A procedure for the specific enrichment and isolation of species of the genus Halobacterium was designed, based on the ability of Halobacterium cells to grow anaerobically by fermentation of l-arginine. None of the other genera of neutrophilic halophilic Archaea tested grew fermentatively on arginine. Using anaerobic enrichments in the presence of arginine, representatives of the genus Halobacterium were consistently isolated from saltern crystallizer ponds in Eilat (Israel) and San Francisco Bay (California), environments in which Halobacterium represents only a very small fraction of the halophilic archaeal community.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1574-6968.1999.tb13525.x
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  • 10
    Electronic Resource
    Electronic Resource
    Uptake and turnover of acetate in hypersaline environments (1995)
    Oxford, UK : Blackwell Publishing Ltd
    FEMS microbiology ecology 18 (1995), S. 0 
    Details
    ISSN: 1574-6941
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Abstract: Acetate uptake and turnover rates were determined for the heterotrophic community in hypersaline environments (saltern crystallizer ponds, the Dead Sea) dominated by halpphilic Archaea. Acetate was formed from glycerol, which is potentially the major available carbon source for natural communities of halophilic Archaea. Values of [Kt+Sn] (the sum of the substrate affinity and the substrate concentration present in situ) for acetate measured in saltern crystallizer ponds were around 4.5–11.5 μM, while in the Dead Sea during a Dunaliella bloom values up to 12.8 μM were found. Maximal theoretical rates (Vmax) of acetate uptake in saltern crystallizer ponds were 12–56 nmol l−1 h−1, with estimated turnover times for acetate (Tt) between 127–730 h at 35°C. Vmax values measured in the Dead Sea were between 0.8 and 12.8 nmol l−1 h−1, with turnover times in the range of 320–2190 h. Vmax values for acetate were much lower than those for glycerol. Comparisons with pure cultures of halophilic Archaea grown under different conditions showed that the natural communities were not adapted for preferential use of acetate. Both in natural brines and in pure cultures of halophilic Archaea, acetate incorporation rates rapidly decreased above the optimum pH value, probably since acetate enters the cell only in its unionized form. The low affinity for acetate, together with low potential utilization rates result in the long acetate turnover times, which explains the accumulation of acetate observed when low concentrations of glycerol are supplied as a nutrient to natural communities of halophilic Archaea.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1574-6941.1995.tb00165.x
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