Influence of refined cellulose on human bowel function and calcium and magnesium balance.

The effect of cellulose purified from wood pulp on wet and dry stool weights, gastrointestinal transit time (TT), frequency of defecation, and calcium and magnesium balances was tested. Seven healthy women consumed a low fiber diet of constant composition (percentage of total kcal: 23% protein, 30% fat, 47% carbohydrate) and the same metabolically controlled diet to which 16 g of refined cellulose (Solka Floc) was added. Each diet was consumed for approximately one month.

Magnetospheres of the galilean satellites.

The plasma and field perturbations of magnetospheres that would surround magnetized galilean satellites embedded in the corotating jovian plasma differ from those produced by interaction with an unmagnetized conductor. If the intrinsic satellite dipole is antiparallel to that of Jupiter, the magnetosphere will be open. It is predicted that Io has an internal magnetic field with a dipole moment of 6.

Initial pioneer venus magnetic field results: nightside observations.

Initial observations by the Pioneer Venus magnetometer on the nightside of Venus frequently reveal moderately strong fields from 20 to 30 nanoteslas. However, there is little evidence that thesefields arise from an internal dynamo since they are mainly horizontal and vary from orbit to orbit. Determining a precise upper limit to the intrinsic moment awaits further processing.

Initial pioneer venus magnetic field results: dayside observations.

Initial observations by the Pioneer Venus mangnetometer in the sunlit ionosphere reveal a dynamic ionosphere, very responsive to external solar-wind conditions. The localtions of the bow shock and ionosphere are variable. The strength of the magnetic field just olutside the ionopause is in approximate pressure balance with the thermal plasma of the ionosphere and changes markedly from day, to day in response to changes in solar wind pressure.

Management of congenital adrenal hyperplasia using serum dehydroepiandrosterone sulfate and 17-hydroxyprogesterone concentrations.

Simultaneous serum concentrations of dehydroepiandrosterone sulfate (DHEA-S) and 17-hydroxyprogesterone (17-OHP) were compared with urinary 17-ketosteroid (17-KS) and pregnanetriol (PT) excretion during therapy in 18 prepubertal patients with the 21-hydroxylase deficiency form of congenital adrenal hyperplasia (CAH). Patients were classified into those in good, poor, or questionable control on the basis of clinical examination, skeletal age, and 17-KS and PT excretion. During therapy, use of serum steroid concentrations was found to be nearly as accurate in judging adequacy of control as use of urine steroid concentrations.

The usefulness of the posterior oblique views in perfusion lung imaging.

A total of 116 perfusion lung images, with and without posterior oblique views, were compared by four trained observers. There was a significant increase in the number of perfusion defects detected when the posterior oblique views were included. Pairs of projections of 89 lung images were read by the four observers.