Biomedical subjects

M Ullman

Publications and source records attributed to M Ullman.

At least 37 records · Page 2Linked to original sources

PubMed1984

[Unusual localization of torsion of the appendix epiploica].

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Abdomen, Acute↗

PubMed1984

Posttraumatic and postoperative acute acalculous cholecystitis.

Acute acalculous cholecystitis has been described following surgery unrelated to the biliary tract and after multiple trauma (DuPriest et al., 1979; Gately & Thomas, 1983; Herlin et al., 1982; Howard, 1981; Long et al., 1978; Orlando et al., 1983). Mortality rate is high, probably in part reflecting delayed diagnosis and treatment, since symptoms and signs of the primary disease often mask the symptoms of cholecystitis. Increased awareness of this rare condition might lead to more accurate diagnosis and treatment and thereby improved outcome. In this report three patients who developed acute acalculous cholecystitis following unrelated surgery or multitrauma are described.

Acute Disease↗

PubMed1983

Transcription of plasmid DNA in Escherichia coli minicells.

Cellular RNA polymerase in association with plasmid DNA segregates into the minicells of minicell-producing strains. In general, one "plasmid equivalent" of RNA polymerase, reflecting the size of the segregating plasmid DNA and its efficiency of segregation, entered the minicell with the plasmid. The amount of RNA polymerase (measured as the amount of enzyme activity purified from minicells and the rate of RNA synthesis in plasmid-containing minicells), and not the DNA content, appeared to be rate-limiting in plasmid-mediated transcription in minicells. The purified minicell and cellular RNA polymerases showed the same sensitivity to rifampin and streptolydigin; both were associated with sigma factor, although the minicell enzyme appeared to have slightly less than the cellular enzyme. These studies demonstrate that transcription of plasmid DNA in minicells is a function of the efficiency of segregation and the amount of RNA polymerase which enters with the plasmid DNA. Because RNA polymerase is limiting, plasmids with relatively weak promoters for the vector genes should be used when attempting to identify products from inserted foreign DNA.

Aminoglycosides↗

PubMed1980

Motor nerve conduction velocity and nerve fibre diameter in experimental protein deprivation. Studies on rat peripheral nerve during development.

Motor nerve conduction velocity (MCV) and nerve fibre calibre spectra of peripheral nerves were determined at different ages, during development in normal and protein-deprived rats. The protein deprivation was achieved by feeding female rats a protein deficient diet. Compared to control rats which were given a balanced diet, given ad lib from 2 weeks before conception and onwards. After weaning, the offspring were fed the same protein-deficient diet, the protein-deprived rats showed considerably reduced body weights but moderately reduced values of albumin and total protein in serum at 6 and 15 weeks of age. Although essentially the same, the mean nerve fibre diameter of the studied dorsal tail nerve was slightly larger in the protein-deprived rats at 6 weeks of age than in controls, while the inverse relationship was found at 15 weeks of age. The increase of MCV in normal and protein-deprived rats followed essentially the same curve during the period from 5-30 weeks of age. The results indicate that the MCV and nerve fibre diameter during development are correlated to chronological age and not to body size, although protein deprivation may, to a minor extent, influence nerve fibre calibre growth.

Animals↗

PubMed1978