Geraldine Roberts

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We have compared several methods for reducing calcium and magnesium concentrations in tissue culture medium, with the objective of producing selective deficiency effects on the growth of mouse (L5178Y) and human (P1R) lymphoblasts. In experiments in which calcium- and magnesium-“free” McCoy’s medium was supplemented with 15% horse or fetal calf serum,(More)
Twenty regular smokers ( > 15 cigarettes/day), were tested on a letter cancellation task, over four successive days. On one of the test days subjects were smoking deprived for > 12 h, while on the other days they were not nicotine deprived (smoking was allowed until 1 h before testing). The first letter cancellation test was given prior to smoking. Then one(More)
Breast milk fat concentrations of three cyclodiene insecticides--dieldrin, heptachlor epoxide, and oxychlordane--were measured in 797 primiparous women, and sources of exposure that contributed significantly to high body burdens were investigated. All three distributions were highly skewed to the right, with median concentrations falling between 0.007 and(More)
The incorporation of extracellular orthophosphate-32P into cellular ATP, 2,3-diphosphoglyceric acid, and inorganic phosphate has been measured over a period of 6 hours in vitro in red blood cells from normal subjects and from patients with hereditary spherocytosis who had undergone splenectomy. The pattern of labeling of the intracellular compounds was(More)
OBJECTIVE This single-case study was designed to duplicate Smelt's (1989) study of the effects of the application of an inhibitive weight-bearing splint on upper-extremity muscle tone and function in a child with cerebral palsy. METHOD Data on tone were collected by tracing the hand when weight bearing in the extended arm posture. Data on function were(More)
The incorporation of extracellular orthophosphate-32P into cellular ATP, 2,3-diphosphoglyceric acid, and inorganic phosphate has been measured over a period of 6 hours in vitro in red blood cells from normal subjects and from patients with hereditary spherocytosis who had undergone splenectomy. The pattern of labeling of the intracellular compounds was(More)
This study was designed to explore the effect of race and gender on the forehead muscle tension and finger temperature response to biofeedback-assisted relaxation training in individuals with normal blood pressure. Forty-five subjects-18 Black and 27 White, 25 males and 20 females-participated in eight sessions of autogenic relaxation training and thermal(More)
Racial differences in the relaxation response of hypertensives maintained on diuretic were investigated by comparing blood pressure, muscle tension, and hand temperature changes occurring with biofeedback assisted relaxation. Resting blood pressures were not different in blacks compared with whites. Both black and white subjects decreased diastolic blood(More)