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  • 1
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 276 (1978), S. 33-37 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] A set of restriction fragments cloned into phage λ vectors has allowed us to locate a site necessary for full rpoBC expression. We find that these genes for the two large subunits of RNA polymerase and the genes, rplL and rplJ, for two ribosomal proteins, form a single ...
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  • 2
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The RNA polymerase mutation, alt-1, affects the σ subunit and alters the in vitro selectivity of RNA polymerase to parallel the in vivo phenotype. We propose that the mutation changes the distribution of functionally distinct polymerase ...
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  • 3
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 270 (1977), S. 121-122 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Gene Expression. Vol. 3: Plasmids and Phages. By Benjamin Lewin. Pp.942/ 928. (Wiley: London and New York, 1977.) Hardback £24; $40.65; paperback £10.25; $19.50. READERS of this journal will be familiar with the changing fortunes of microbial genetics in recent years. In ...
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  • 4
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 260 (1976), S. 646-648 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] (1) The symbol rpo should be applied to the structural genes coding for RNA polymerase subunits, and to their regulatory genes and sites. (The symbol rna, proposed in 1968 (ref. 7), has not come into general use11.) (2) The genes for the a, b and b? subunits should be called rpoA, rpoB and rpoC, ...
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  • 5
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 253 (1975), S. 265-266 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Mothers who had volunteered as subjects in response to newspaper advertisements were asked to bring their infants into our laboratory at a time when the infant was 'usually active'. Thirty-four infants, 2-14 months old, were tested in a small, sparsely-furnished room (15 ft by 10 ft) with a one-way ...
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Journal of applied electrochemistry 6 (1976), S. 453-462 
    ISSN: 1572-8838
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Electrical Engineering, Measurement and Control Technology
    Notes: Abstract Results of beaker scale and large laboratory scale experiments on the deposition of manganese from chloride electrolytes using selenium based additives are reported. High cathode efficiencies (85–90%) were obtained at moderate selenium levels (0.03–0.06 gl−1). Selenium pick-up in the deposit was lower when selenium was added as the selenate [Se(VI)]. A cost/benefit analysis of selenium additions is presented.
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Journal of applied electrochemistry 6 (1976), S. 199-209 
    ISSN: 1572-8838
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Electrical Engineering, Measurement and Control Technology
    Notes: Abstract Results of beaker scale and large laboratory scale experiments on the deposition of manganese from chloride electrolytes are reported for conditions where chlorine is the secondary anode product. Manganese concentration in the catholyte was found to be the most significant variable, with higher manganese levels (to 33 g Mn l−1) resulting in higher current efficiency (65–70%) and lower power consumption (5.5 kWh kg−1). Temperature (30–60°C) and current density (1.0–2.0 kAm−2) had opposing effects on current efficiency and power consumption. In the ranges studied, lower temperatures and higher current densities gave rise to increases in current efficiency and power consumption. The literature on the electrowinning of manganese from chloride electrolytes is reviewed and the anomalies in previous reports discussed.
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  • 8
    Electronic Resource
    Electronic Resource
    Springer
    Plant and soil 50 (1978), S. 723-725 
    ISSN: 1573-5036
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Incidence in the field of crop disorders known to be due to localised calcium deficiency bears little relation to soil calcium status, and is more often associated with particular types of weather. We are suggesting that brief periods of soil partial anaerobiosis following wet weather, and other unfavourable soil physical conditions such as compaction, lead to a temporary reduction in the distal, undifferentiated region of roots from which the majority of the calcium taken up is transported to the shoot. This might lead to a transient calcium deficiency in rapidly growing shoot tissues, and thence to necrosis.
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  • 9
    Electronic Resource
    Electronic Resource
    Springer
    Plant and soil 46 (1977), S. 705-712 
    ISSN: 1573-5036
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary The critical concentration of a mineral element in plants is usually defined by reference to the curve relating yield to plant nutrient concentration. This curve alters shape depending on the stage of growth, species, and other factors such as light and temperature, so that the critical concentration also varies. It is shown that this effect could arise from two simple, but reasonable assumptions: first, that the percentage depression of growth rate due to nutrient deficiency is related by a simple diminishing-returns type function to plant nutrient concentration in a manner which is independent of growth stage: and second, that the absolute growth rate of non-limited plants declines as their weight increases beyond a certain value. If the critical concentration were to be defined in terms of percentage growth rate depression, it is possible that it would be found to be much less variable than it now seems. re]19760730
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  • 10
    Electronic Resource
    Electronic Resource
    Springer
    Plant and soil 50 (1978), S. 723-725 
    ISSN: 1573-5036
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Incidence in the field of crop disorders known to be due to localised calcium deficiency bears little relation to soil calcium status, and is more often associated with particular types of weather. We are suggesting that brief periods of soil partial anaerobiosis following wet weather, and other unfavourable soil physical conditions such as compaction, lead to a temporary reduction in the distal, undifferentiated region of roots from which the majority of the calcium taken up is transported to the shoot. This might lead to a transient calcium deficiency in rapidly growing shoot tissues, and thence to necrosis.
    Type of Medium: Electronic Resource
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