Results 231 to 240 of about 12,241 (252)

Physical characteristics of new coliphages

Canadian Journal of Microbiology, 1974
Seven new bacteriophages for Escherichia coli B, isolated from a farm animal waste lagoon, were characterized in regard to morphology, buoyant density, UV-sensitivity, and heat-sensitivity.
D. L. Berryhill, G. J. Berg, Thomas K. Borg   +2 more
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Rapid coliphage detection assay

Journal of Virological Methods, 2001
A rapid coliphage detection assay was developed, based on the phage-induced release of beta-galactosidase from cells of Escherichia coli. The assay could detect as few as five coliphage per sample without an overnight incubation period. The range of acceptable assay parameters was identified.
Joseph O. Falkinham, James E Stanek
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Multiplication of Coliphage at High Concentration

Nature, 1949
THE 'single-step' method devised by Ellis and Delbruck1 has proved of immense value in the hands of a number of workers in studying the multiplication of various bacteriophages ; but it was devised specifically to investigate the behaviour of bacteria and adsorbed phage at high dilution, and gives no direct information about the more complex situation ...
J W Czekalowski, D E Dolby
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Lethal lysogenization by coliphage lambda

Virology, 1976
Abstract Mutants of lambda insensitive to epistatic replication inhibition by repressor ( ri c ) were studied during lysogenization of sensitive host cells. These mutants establish defective complexes which neither lyse nor multiply as lysogens.
Masako Ohashi, William F. Dove
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RNA in Coliphage T5

Nature, 1973
VIRUSES are thought to have either RNA or DNA as their genetic material, but not both1, although oncogenic RNA viruses containing reverse transcriptase have been shown to contain some DNA. I did not expect to find that coliphage T5, a DNA-containing virus, also contained some RNA.
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Structural proteins of coliphage N4

Virology, 1973
Abstract The proteins from bacteriophage N4, dissociated with 1% SDS and 2% 2-mercaptoethanol, have been investigated by SDS polyacrylamide gel electrophoresis. Ten different polypeptide chains were identified in the purified virus. The molecular weights of the protein monomers estimated by coelectrophoresis with marker proteins ranged from 31,000 to
M. Giraldi, Gian Carlo Schito, M. Toni
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Coliphage survival in seawater

Water Research, 1985
Abstract The relative survival of coliphages isolated from seawater under controlled conditions in different media, in the laboratory and in the marine environment, was investigated. The results show that the survival under controlled conditions in different media, and also in the sea, is affected by biological and chemical factors.
Juan J. Borrego, Pedro Romero
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The genetics and physiology of coliphage N4

Virology, 1973
Amber mutants of bacteriophage N4 were isolated and classified into 27 cistrons by complementation tests. A group of 5 cistrons are essential for the synthesis of phage DNA, whereas 22 other cistrons, when defective, permit varying degrees of N4 DNA replication.
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Molecular weights of coliphages and coliphage DNA

Journal of Molecular Biology, 1970
Abstract The range of usefulness of the high-speed equilibrium centrifugation method of Yphantis (1964) has been extended to measure the molecular weight of Escherichia coli phage T7. Values for \ gn of phages T7, T5 and T4 were obtained by pycnometry; the phage concentrations were determined by measuring nitrogen and phosphorus contents, and ...
Frank C. Bancroft, David Freifelder
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In vitro initiation of coliphage T7 mRNA

Archives of Biochemistry and Biophysics, 1972
Abstract The synthesis of two classes of late T7 proteins appears to be directed by several polycistronic messenger RNAs. To understand how they are translated in appropriate order during phage infection, we have isolated late mRNA from T7-infected cells and mRNA that was synthesized in vitro with the T7 RNA polymerase and T7 DNA.
Philip Leder, Robert Callahan
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