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Biomedical subjects

R Meyer

Publications and source records attributed to R Meyer.

At least 451 records · Page 25Linked to original sources
PubMed1975

The sock aid.

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Cerebrovascular Disorders↗
PubMed1975

[On the theory of the growth of germs as function of time and concentration (author's transl)].

The experimental harvest of germs is proportional to the amount of the minimal substrate. We formulate, therefore, the growth of germs as function of the employment of complete nutrient mediae containing all substrates required between two divisions. This conception may also be used for the function of time of the growth curve even beyond the log phase and allows a hard-and-fast rule for the region of nutritional deficiency. Our growth rates estimated as function of the concentration deviates from those established by Monod. This deviation can experimentally not be determined as the values of both estimations are in the experimental margin of tolerance. In contract to Monod's ferment conception implicating a growth of germs up to an unlimited dilution of nutrient mediae, our conception can more be recommended because of the defined beginning of growth.

Bacteria↗
PubMed1975

Effect of immunization with attenuated Mycobacterium bovis (BCG) on experimental herpetic keratitis.

Mycobacterium bovis (BCG, Pasteur strain) was injected intraperitoneally into guinea pigs and rabbits on the 19th and 5th days prior to the intracorneal inoculation of Herpesvirus hominis. During a three-day and nine-day observation period, respectively, the BCG had no significant effect on the clinical course of the herpetic keratitis and no effect on the titer of virus present in the infected corneas.

Animals↗
PubMed1974

Alternate forms of the resistance factor R1 in Proteus mirabilis.

The resistance factor R1 may exist in either of two stable physical states in Proteus mirabilis PM-1. In one case, the R1 deoxyribonucleic acid (DNA) has a buoyant density of 1.711 g/cm(3) and replicates under stringent control. Cells harboring R1 in this form may transfer drug resistance by conjugation. In the other case, R1 DNA shows two buoyant density classes at 1.707 and 1.714 g/cm(3). The 1.714 g/cm(3) component is replicated under a degree of relaxed control, and strains carrying this form generally cannot transfer drug resistance by conjugation. Intracellular amounts of the R factor-coded enzyme, chloramphenicol acetyltransferase, did not correspond to amounts of plasmid DNA in Proteus, and the enzyme was present in lower amounts than in Escherichia coli. It is proposed that the two states of R1 in Proteus may represent stable associated and dissociated forms of the plasmid.

Acyltransferases↗