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Glutaraldehyde prefixation causes a considerable inactivation of the acid phosphatase of yeast protoplasts in dependence on the duration of aldehyde influence. Lead ions necessary for ultracytochemical demonstration effect a still stronger inhibition of enzymatic activity. Prefixation, however,...
The effects of various levels of nutrients like potassium phosphate (dibasic), calcium nitrate, and calcium chloride individually and in combinations were studied on the toxicity of the commonly used pesticides carbofuran and hexachlorocyclohexane (HCH) in growth medium to the N2‐fixing...
The closely related phages T3 and T7 exhibit different growth patterns on Escherichia coli W host cells (E. coli K12 derivatives). T7 grows normally while T3 does not adsorb. T3hw mutants displaying a T7‐like host range were isolated and described.
The distribution of variables characterizing the morphology of the mycelium of Streptomyces hygroscopicus grown in glucose‐limited chemostat cultures at different specific growth rates were investigated statistically. The values of the hyphal growth unit (L/N) and the values of the distance from...
A partially purified extract of DNA methylases from E. coli K‐12 containing DNA‐adenine as well as DNA‐cytosine methylase activities has been examined with respect to different DNA species as substrates. The results show that the natural content of 6‐MAP1) in the applied DNA represses the...
Unter Einbeziehung des umgebenden Geländes werden die mikrobiologischen Verhältnisse in zwei Gruppen von heißen Schwefelseen auf Hokkaido (Japan) untersucht und zu Vorgängen bei der sedimentären Lagerstättenbildung von Schwefel und Schwermetall‐Sulfiden unter hydrothermalen Bedingungen im...
Escherichia coli strains B and K12 W 1655 F+ are able to bind more lethal units of colicins E2, E3, G, H, Ia, and K + X per one stable L‐form cell (of the protoplast type) than per one rod cell; colicin D is bound in a higher amount on E. coli B rods. This pattern remains unchanged, if the same...
In den von E. bispora gebildeten Glucoamylasespektren werden insgesamt 10 Isoenzyme nachgewiesen, die unterschiedlich stark in das Medium ausgeschieden werden und in unterschiedlichem Grade einer Repression unterliegen. Die größten Veränderungen im Bandenmuster treten während der logarithmischen...
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