PubMed Health⌕ Search

Biomedical subjects

R A Bulman

Publications and source records attributed to R A Bulman.

28 records · Page 2Linked to original sources
PubMed1978

The movement of plutonium, americium, and curium through the food chain.

The actinides, plutonium, americium and curium, are being produced in increasing quantites as the nuclear programme is expanded. As these alpha-particle-emitting elements are hazardous to man there is considerable concern about the movement of these elements through the environment; The uptake of these elements from soil into the plants is low, as is the gastrointestinal concentration factor. Although there are complexing agents in the environment which have been shown to complex these elements there is no evidence that these complexing agents might bring about a concentration of actinides in the food chain of man.

Actinoid Series Elements↗
PubMed1976

The mycelial cell wall of Penicillium charlesii G. Smith NRRL 1887.

Mycelial cell wall preparations of Penicillium charlesii G. Smith have been shown to have a total neutral carbohydrate content of 69%. Glucosamine which comprises 12% of the wall is present principally as chitin. Lipids comprise 37.5% of the wall while polypeptides comprise 19.5%. No galactofuranose units are present in the wall of this organism which is known to produce an extracellular beta-1,5-galactofuranose containing polymer.

Amino Acids↗
PubMed1975

Influence of 3-chloropropane-1,2-diol on microbial lipid composition and its effect on the activity of some antibacterial agents.

The organisms E. coli, S. aureus, K. aerogenes, Pr. vulgaris and S. abortusovis were inhibited by 3-chloropropane-1,2-diol at high concentrations (ca 10,000 mug/ml) and Ps. aeruginosa was unaffected. The phospholipid and lipoamino acid composition of E. coli, S. aureus and S. cerevisiae was altered by growth in the presence of 3-chloropropane-1,2-diol. The effect of growth under these conditions on the sensitivity of the bacteria to various antibacterial agents was determined and appears to depend on the hydrophobicity of the drug molecule. Cell division of E. coli and S. aureus was impaired by growth in the presence of 3-chloropropane-1,2-diol leading to filamentous forms. The change in phospholipid composition of both Gram-positive and Gram-negative organisms may influence cell division and antibiotic sensitivity.

Anti-Bacterial Agents↗
PubMed1975

Experimental infection of rabbits with Bacillus cereus.

Bacillus cereus was able to grow and produced local infections following subcutaneous or intramuscular injection. An inflammatory response was produced with necrosis of muscle fibres and calcification. The organism was sensitive to chemotherapeutic agents on in vitro tests.

Abscess↗