The incidence of renovascular lesions in the hypertensive Negro patient

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HYDROLYSIS OF SULPHATE ACID ESTER IN UNSTABILIZED CELLULOSE NITRATES

The rate of hydrolysis of the sulphate acid ester in unstabilized cellulose nitrates in acetone/water solution at 25 °C. has been studied. The rate of hydrolysis in 90% acetone/water was too slow to produce a measurable increase in acidity during 24 hours. In 99% acetone/water solution the initial hydrolysis was very rapid and was followed by slower hydrolysis which was complete after 24 hours. Similar results were obtained with wood cellulose nitrates.In the case of cotton cellulose nitrates, there was an indication that hydrolysis of the sulphate acid ester decreased as the nitrogen content increased. The rate of hydrolysis of the sulphate acid ester in both cotton and wood cellulose nitrates was very similar to that of the sulphate acid ester in cellulose acetate sulphate.

INFLUENCE OF WATER CONCENTRATION ON THE HYDROLYSIS OF UNSTABILIZED CELLULOSE NITRATE IN ACETONE/WATER SOLUTION

The influence of water concentration upon the hydrolysis of the sulphate acid ester in unstabilized cotton and wood cellulose nitrates in acetone/water solution at 25° ± 0.1 °C. has been determined. When the water content of these systems was increased, the rate of hydrolysis of the sulphate acid ester in cotton or wood cellulose nitrates decreased. This effect was greatest in the first hour of hydrolysis. The presence of more than about 2% water in the acetone/water solution prevented the completion of hydrolysis after 24 hours.

Assessing daily management of childhood diabetes using 24-hour recall interviews: reliability and stability

Conducted 24-hr recall interviews concerning daily diabetes management with seventy-eight 6- to 19-year-old patients and their parents. Patients and parents were interviewed independently nine times over 3 months. Data obtained were used to construct 13 adherence measures. All measures yielded statistically significant estimates of parent-child concordance. Parent-child agreement was higher for weekday versus weekend behaviors and when based on nine versus three interviews. For the sample as a whole, parent-child concordance remained stable over the course of the study. Compared to the older patients, the 6- to 9-year-olds exhibited poorer parent-child agreement on measures involving time (e.g., injection and exercise-duration measures). This deficit disappeared, however, as the children became more practiced with the interview procedure. The dietary and glucose-testing measures exhibited moderate stability over the 3-month study. Lower stability estimates were obtained for the exercise and injection measures.