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Biomedical subjects

J R Butler

Publications and source records attributed to J R Butler.

7 recordsLinked to original sources
PubMed1992

Bending strength of Fuji and Ketac glass ionomers after sonication.

Glass ionomer cements mixed by conventional methods contain voids that can decrease their overall strength. This study evaluated the effect of sonication on the reduction of air entrapment by measuring the bending strength in glass ionomer cements (Fujj-II and Ketac-fil). Glass ionomer cement was placed in identical-test vials and sonicated for 45s, 10s, or 0s. The bending strengths were measured (0.005 in min-1) after setting times of 1 or 2 weeks. Mean bending strengths (MPa +/- SD) for the 12 treatment both cements (P < 0.001) and sonication times (P < 0.001). The effect of setting time produced minimal increases in bending strength (P < 0.218). The sonication of freshly mixed glass ionomer cements is a possible solution for reducing voids to increase bending strength.

Analysis of Variance↗
PubMed1992

Association of a cGMP-binding activity with nuclei isolated from amoebae of Dictyostelium discoideum and Polysphondylium violaceum.

When vegetative and early slug stage amoebae of Dictyostelium discoideum or Polysphondylium violaceum were lysed by filter breakage in a nuclear isolation buffer not containing detergents, substantial levels of a cGMP-binding activity with slow-dissociation kinetics were detected. After fractionation by centrifugation, 50% or more of this binding activity was associated with isolated nuclei. In addition, with Polysphondylium cells, the fraction of stable, nuclear-associated binding activity appeared to increase during cell aggregation. These results support the idea that cGMP might function in the nucleus during early development.

Animals↗
PubMed1977

Marital status and hospital use.

Published data from the Hospital In-Patient Enquiry (1973) are used to examine the relationship between hospital use and marital state. Non-married men and women are shown to have higher discharge rates and longer mean durations of stay than married patients in the corresponding age groups, and to account, on average, for about 24 000 additional beds each day in non-psychiatric hospitals. Hospital Activity Analysis data from one region suggest that the higher rates of bed use by non-married patients as a whole are maintained for both single and widowed patients separately, and the differences are also observed in all types of non-psychiatric hospitals. Two possible modes of explanation are discussed: that the incidence and possibly the severity of conditions that are normally treated in hospital may be differentially distributed among marital status groups; and that non-clinical factors in decisions about admission and discharge may be associated more commonly with non-married than married patients. The results carry no normative implications for the uses to which hospital resources should be put.

Adult↗
PubMed1976

Arbitration agreements and your malpractice coverage.

With new legislation and favorable case law developments, many providers of health care services are turning to binding arbitration agreements as a partial solution to the medical malpractice crisis. Existing data indicate tremendous advantages can be gained from the use of such agreements, if they are carefully drawn to comply with new law, tailored to the particular situation in which they will be used and coupled with appropriate procedures to secure the intended benefits. Arbitration is not a substitute for insurance, but if a provider has taken the calculated risk of forgoing insurance he should not be without a carefully drawn binding arbitration agreement.

Costs and Cost Analysis↗
PubMed1975

The choice of practice location.

A ten per cent sample survey of all general practitioners in England and Wales in 1969-70 included two questions about the choice of practice location. The most common reasons given were the absence of any real alternatives (in the immediate post-war period), the influence of family or friends, the existence of medical contacts in the area, and favourable points about the practice itself.In considering possible future moves, general practitioners would pay closest attention to the educational facilities of an area, its rural or coastal location, its social and cultural amenities, and the practice conditions. The conclusion is drawn that financial incentives are unlikely to contribute much towards a more equal distribution of general-practitioner manpower. More thought should be given to recruitment to the medical profession in under-doctored areas through the development of the highest professional standards and facilities in such places.

Adult↗