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Biomedical subjects

J Parris

Publications and source records attributed to J Parris.

6 recordsLinked to original sources
PubMed1999

Partnerships in healthcare: a Commonwealth perspective.

This article briefly outlines the nature and characteristics of partnership, and points to the need to build partnerships through deliberate efforts, since they do not occur by simply bringing people and/or resources together. It identifies some of the reasons why partnerships in health are invaluable in meeting the priority health needs of populations, and the importance which the Commonwealth places on partnerships given the unique characteristics which are common to its member countries. The article then uses practical examples to illustrate the value of partnerships in health at the national, regional and international level. For the benefit of front-line healthcare providers, some suggestions are given of how partnerships could be used to enhance the services which they give to the communities they serve.

Communication↗
PubMed1994

Effectiveness of apical clearing: histological and radiographical evaluation.

Preparation of the apical one-third in curved canals is difficult both in debridement and maintaining canal shape. A technique of final apical preparation, "apical clearing," attempted to debride and increase the apical size without transportation. Apical clearing is defined as: following cleaning and shaping, sequentially rotating files two to four sizes larger than the initial (master) apical file at working length, then rotating the largest apical file again after a final irrigation and drying. This study evaluated histologically and radiographically the quality of apical preparation with or without apical clearing. Examined were (a) extent of transportation and (b) debris accumulation in the apical third. Fifty-four extracted teeth with vital pulps and curved canals were divided into two groups. After step-back preparation, 29 had apical clearing and 25 did not. Pre- and postpreparation double-exposed radiographs evaluated canal deviation. The apical one-third of the canals was examined histologically and ranked, based on remaining tissue, predentin, dentin shavings, other debris, and canal walls planed. Radiographically, the apically cleared group showed slight deviation of the canal during preparation. Histologically, canals in the apically cleared group had significantly less remaining tissue, predentin and debris, as well as more canal walls planed. This experiment showed that apically the apical clearing technique resulted in better debridement, with minimal increase in apical transportation.

Chi-Square Distribution↗
PubMed1986

Incorporation of tritiated galactose into galactocerebroside by cultured rat oligodendrocytes: effects of cyclic adenosine 3',5'-monophosphate analogues.

Cells dissociated from the forebrains of 21-day-old rats were enriched in oligodendroglia by Percoll gradient centrifugation, seeded on polylysine-coated surfaces, and cultured in a serum-containing medium. Incorporation by the cultures of tritium from D-[3H]galactose into the galactosyl residue of galactocerebroside (galC) increased in an almost linear fashion for 48 h with 1-8 muCi of D-[3H]galactose (30 mCi/mumol) per milliliter medium. Treatment for 2 days (day 1-3 after seeding) with 10(-4) M or 10(-3) M dibutyryl cyclic adenosine 3',5'-monophosphate (db cyclic AMP) or 10(-4) M 8-bromo cyclic AMP stimulated galC radiolabelling. Incorporation of D-[3H]galactose into galC during a terminal 48-h radiolabelling period was not stimulated when the cells were continuously treated with these cyclic AMP analogues for 8 rather than 2 days.

8-Bromo Cyclic Adenosine Monophosphate↗