Chromaffin granules isolated from beef adrenal medulla took up C(14)-labeled catecholamines from an isotonic medium at 37 degrees C at a rate approximately 20 times the rate at 0 degrees C. The uptake was stimulated three- to five-fold by Mg(++) and adenosine triphosphate. Reserpine (1 x 10(-5)M) caused a 90 percent inhibition of uptake; ethylenediaminetetraacetic acid completely inhibited the ...

BACKGROUND Characteristics such as age and race are often cited as determinants of the response of blood pressure to specific antihypertensive agents, but this clinically important issue has not been examined in sufficiently large trials, involving all standard treatments, to determine the effect of such factors. METHODS In a randomized, double-blind study at 15 clinics, we assigned 1292 men ...

BACKGROUND Self-efficacy plays an important role in oral health-related behaviours. There is little known about associations between self-efficacy and subjective oral health among populations at heightened risk of dental disease. This study aimed to determine if low self-efficacy was associated with poor self-rated oral health after adjusting for confounding among a convenience sample of pregna...

The effects of oral doses of theophylline and a iS-adrenergic agonist, fenoterol, were examined in 18 asthmatic young adults. Significant bronchodilation was seen with high-dose theophylline (FEy1 increased 14 percent) and with full 10-mg doses of fenoterol (FEV, increased 10 percent). Low-dose theophylline alone (130 mg) increased FEV1 by 5 percent, but when combined with 5 mg of fenoterol, a ...

Grandparents act as the third largest caregiver after parental care and daycare in Germany, many Western societies. Adopting a double-generation perspective, we investigate causal impact of this mode on children's health, socio-emotional behavior, school outcomes, well well-being. Based representative German panel data sets, exploiting arguably exogenous variations geographical distance to gran...

Clones of aspen (Populus tremuloides Michx.) were identified that differ in biomass production in response to O(3) exposure. (14)Carbon tracer studies were used to determine if the differences in biomass response were linked to shifts in carbon allocation and carbon partitioning patterns. Rooted cuttings from three aspen Clones (216, O(3) tolerant; 271, intermediate; and 259, O(3) sensitive) we...