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The influence of some metal ions was investigated on the milk‐clotting activity of the pure rennin‐like enzyme of Penicillium citrinum 805. Barium and calcium enhanced the clotting activity while copper, nickel, and sodium ions showed slight inhibitory effects. Above a certain concentration...
The endotoxin from Pseudomonas aeruginosa C9 was obtained by five standard methods of extraction for comparative electron microscopic studies. Observation of the five preparations demonstrated the presence of two major types of structures. The first of these was seen in endotoxins prepared by...
A study has been made of the carbon nutrition of Coriolopsis occidentalis using carbohydrates, amino acids, and their related compounds in liquid growth medium. Of the simple carbohydrates tested, the oligosaccharides supported growth best followed by xylose. Cellulose supported fair growth as a...
Growth of Escherichia coli, strain K‐10, in synthetic medium with nitrate as a sole source of nitrogen was not found under aerobic conditions, but found in the medium under anaerobic conditions as well as in synthetic medium with ammonium or nitrite under both aerobic and anaerobic conditions....
A pentachloronitrobenzene (PCNB) resistant mutant of Neurospora crassa and its respective wild type were grown in liquid medium with and without PCNB. Physically isolated hyphal walls were subjected to acid hydrolysis and analyzed for glucose and glucosamine. In the wild type strain PCNB reduced...
Nach Mutagenisierung von T3‐Phagen mit salpetriger Säure wurden mittels Temperaturshift temperatursensitive Mutanten isoliert. Sowohl Inaktivierung als auch Mutagenisierung erfolgten mit einer Reaktion 1. Ordnung. 123 Isolate wurden in Komplementierungstests geprüft. Die spot‐Test‐Technik ergab...
Durch Partialhydrolyse des O‐spezifischen Polysaccharids von Sh. flexneri Stamm 38/64 (Serotyp 4b, Antigenstruktur IV:6…) und Charakterisierung der gebildeten Oligosaccharide, sowie durch Permethylierungsanalyse wurde die Struktur der “repeating units” dieses Polysaccharids ermittelt:
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