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Biomedical subjects

B Shearer

Publications and source records attributed to B Shearer.

8 recordsLinked to original sources
PubMed1996

Influence of marginal configuration and porcelain addition on the fit of In-Ceram crowns.

The fit of In-Ceram copings and crowns was investigated in a laboratory study. Two methods were used, one a direct sectioning technique and the other a cement analogue technique using addition-cured polyvinylsiloxane impression material. The former method involved 40 crowns cemented and sectioned on their respective electroformed silver dies. For the second method, 80 analogues were embedded and sectioned. All measurements were made using a Reflex microscope. This showed In-Ceram crowns and copings to fit well with marginal openings and ranging from 1 to 63 microns and a mean of 19 microns. No significant difference in fit was found between chamfer margins and shoulder margins. The addition of porcelain to the In-Ceram coping and repeated firing cycles involved in building a crown did not alter the fit. It is concluded that In-Ceram crowns fit well in comparison to other crown types.

Analysis of Variance↗
PubMed1996

The clinical practice developmental model: the transition process.

The authors report their hospital's experience in replicating Benner's novice-to-expert clinical nursing practice model, called the Clinical Practice Developmental Model. The authors describe the outcomes of an exploratory, qualitative study conducted to understand staff nurses' perceptions of their transition experience from a traditional clinical ladder for advancement and recognition to the theoretically based clinical practice developmental model. The findings of this study identify critical factors that influenced nurses' perceptions and describe positive and negative outcomes of transition. Specific recommendations to facilitate organizational changes for the nurse executive and the individual nurse are discussed.

Adult↗
PubMed1993

Comparison of CINAHL, EMBASE, and MEDLINE databases for the nurse researcher.

The purpose of this research was to determine which of three databases, CINAHL, EMBASE or MEDLINE, should be accessed when researching nursing topics. The three databases were searched for citations on topics selected by three nurse researchers and the results were compared. For the search of nursing care literature on a medical condition, it was helpful to search both CINAHL and MEDLINE. CINAHL provided the majority of relevant articles for the second search, on computers and privacy, but inclusion of MEDLINE and EMBASE enhanced retrieval somewhat. The search on substance abuse in pregnancy, not restricted to nursing literature, retrieved better results when searching both MEDLINE and EMBASE. Due to the nature and distribution of the nursing literature, it is especially important for the searcher to understand and respond to the focus of the researcher.

Clinical Nursing Research↗
PubMed1985

Outer surface changes of Pseudomonas aeruginosa in relation to resistance to gentamicin and carbenicillin.

The outer surface structure of clinical isolates of Pseudomonas aeruginosa resistant to carbenicillin or gentamicin or both was studied by thin-section electronmicroscopy and compared with that of sensitive isolates. The latter had a fairly smooth outer layer. Strains resistant to both antibiotics were characterised by extrusions that appeared to constitute extensions of the outer membrane. The outer membrane appeared wavy with distortion of its tripartite structure. The latter findings were also present in isolates resistant to only one of the two antibiotics. The disorganisation of the outer membrane might contribute to the expression of resistance.

Acetyltransferases↗
PubMedDate not supplied

Grateful Med: getting started.

When a local medical library is not available, it is often necessary for physicians to discover alternate ways to receive medical information. Rural physicians, particularly, can make use of a computer program called Grateful Med that provides access to the same literature available to physicians in large cities. This program permits the user to perform database searches on the National Library of Medicine database (MEDLINE), corresponding to the primary index to medical literature, Index Medicus. In this article, we give the procedure for procuring a National Library of Medicine password and for making efficient use of the Grateful Med program.

Computer User Training↗
PubMedDate not supplied

A primer for users of medical bibliographic databases.

A database is electronic information. Perhaps one of the most important information sources in medicine is that which is accessed electronically through a database named MEDLINE, the core medical literature published since 1966. MEDLINE is sold by three major vendors (BRS, Dialog, and the National Library of Medicine) to information experts and to medical experts. Information experts (librarians) and medical experts (physicians) can access MEDLINE by two different methods. This article discusses both and emphasizes use by the medical practitioner. An annotated guide to database vendors is provided, and guidelines are offered that will assist the physician in selecting equipment and assessing services.

MEDLARS↗