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Biomedical subjects

J S Crane

Publications and source records attributed to J S Crane.

5 recordsLinked to original sources
PubMed1994

Idiopathic CD4+ T-cell lymphocytopenia with verrucae, basal cell carcinomas, and chronic tinea corporis infection.

Idiopathic CD4+ T lymphocytopenia should be considered in HIV-negative patients with skin lesions commonly associated with HIV infection. Patients with idiopathic CD4+ T lymphocytopenia are presumably rare, often have dermatologic lesions, always have low CD4+ T lymphocyte counts, and lack all evidence of HIV-1 infection. We describe a young man with verrucae, basal cell carcinomas, chronic tinea corporis, and laboratory evidence supporting a diagnosis of idiopathic CD4+ T lymphocytopenia.

Adult↗
PubMed1971

Dielectrophoresis of cells.

Dielectrophoresis, the motion produced by the action of nonuniform electric field upon a neutral object, is shown to be a simple and useful technique for the study of cellular organisms. In the present study of yeast (Saccharomyces cerevisiae) using a simple pin-pin electrode system of platinum and high-frequency alternating fields, one observes that the collectability of cells at the electrode tip, i.e. at the region of highest field strength, depends upon physical parameters such as field strength, field uniformity, frequency, cell concentration, suspension conductivity, and time of collection. The yield of cells collected is also observed to depend upon biological factors such as colony age, thermal treatment of the cells, and chemical poisons, but not upon irradiation with ultraviolet light. Several interesting side effect phenomena coincident with nonuniform electric field conditions were observed, including stirring (related to "jet" effects at localized electrode sites), discontinuous repulsions, and cellular rotation which was found to be frequency dependent.

2,4,5-Trichlorophenoxyacetic Acid↗