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R H Pearson

Publications and source records attributed to R H Pearson.

8 recordsLinked to original sources

A comparison of Fleet Phospho-soda with Picolax in the preparation of the colon for double contrast barium enema.

This study was performed to compare the patient acceptability and the efficacy of two different agents for bowel preparation prior to double contrast barium enema. One-hundred and ninety-four outpatients were randomized to have either two sachets of Picolax or two bottles of Fleet Phospho-soda and restricted to clear fluids on the day prior to their examination. Patients answered a short questionnaire before their enema. The decubitus films were assessed for faecal residue and bowel coating by three observers blinded to the type of preparation used. There was no significant difference in faecal residue nor in the bowel coating between the preparations. However patients found Picolax significantly easier to take, being better tasting and provoking less nausea and vomiting than Fleet Phospho-soda.

Aged↗

The molecular structure of lecithin dihydrate.

Lecithin is a major structural component of biological membranes. Because of their amphipathic nature, lecithin and related phospholipids tend to aggregate as bilayer structures in which the hydrophilic head groups are orientated towards the surface and the hydrophobic hydrocarbon chains towards the interior. A detailed knowledge of the three-dimensional structure of lecithins will aid in the understanding of their role in membrane structure and function, but is still lacking. To this end we have now crystallised and solved the molecular structure of 1,2-dimyristoyl-sn-glycero-3-phosphorylcholine (DMPC), a lecithin species in the naturally occurring configuration. This compound crystallises from a water-containing solution, with two water molecules (5% w/w) of hydration.

Crystallography↗