PubMed Health⌕ Search

Biomedical subjects

B Bunker

Publications and source records attributed to B Bunker.

5 recordsLinked to original sources
PubMed2002

Measurement of spin-transfer observables in p p-->Lambda Lambda at 1.637 GeV/c.

Spin-transfer observables for p p-->Lambda Lambda have been measured using a transversely polarized frozen-spin target and a beam momentum of 1.637 GeV/c. Current models of the reaction near threshold are in good agreement with existing measurements performed with unpolarized particles in the initial state but produce conflicting predictions for the spin-transfer observables Dnn and Knn (the normal-to-normal depolarization and polarization transfer), which are measurable only with polarized target or beam. Measurements of Dnn and Knn presented here are found to be in disagreement with predictions from these models.

Journal Article↗
PubMed2001

XAFS studies of gold and silver-gold nanoparticles in aqueous solutions.

The x-ray absorption fine structure (XAFS) of colloidal Au and Au/Ag nanoparticles (3.5nm and 20nm mean diameter) in an aqueous solution has been investigated. Size dependent alloying was observed upon deposition of Ag on Au core. Ag forms distinct layers around the 20 nm Au nanoparticles. In contrast, random mixing is found for Ag deposited on 3.5nm Au particles.

Journal Article↗
PubMed1999

Noncardiac surgery in individuals with coronary heart disease.

Atherosclerosis is a pathological condition of the coronary arteries clinically manifested as cardiovascular disease, the major cause of death in the industrialized world. Coronary heart disease (CHD) and cerebrovascular disease (CVD), both of which are atherosclerotic diseases, cause more death, disability, and economic loss in the United States than any other disease.

Comorbidity↗
PubMed1977

The iron-sulfur environment in rubredoxin.

The atomic environment around the iron site in the nonheme iron sulfur protein rubredoxin was studied by the extended X-ray absorption fine structure (EXAFS) technique. Within experimental error, the Fe-S bonds in oxidized Clostridium pasteurianum rubredoxin are the same as in the analogue anion [Fe(S2-o-xyl)2]-synthesized by Holm. The average Fe-S bond length is 2.267 +/- 0.003A and the root mean square deviation about this average due to structural disorder is 0.032 + 0.013 - 0.032.

Absorption↗