Blood platelet behaviour during infusion of an Intralipid-based intravenous feeding mixture

Blood platelet behaviour was studied in six patients during infusion of an Intralipid-based intravenous feeding mixture. Lower concentrations of sodium arachidonate were required to induce platelets to aggregate and to undergo a release reaction during intravenous feeding than were required before or after intravenous feeding. This change was not due to a change in serum albumin level. The platelet behaviour that was induced by adenosine diphosphate or by adrenaline remained unchanged during intravenous feeding.

Facts of life about industrial relations training

It is likely that the role of all line managers will come to include an element of industrial relations, write Steve Harrison and Stuart Dimmock. The emphasis on conflict resolution rather than how it is generated means that the line manager's role will become overwhelmingly important.

Political skills and the science of diplomacy

Present NHS management structure involves relationships which are based more on political processes than authority. In the first of a two-part article Steve Harrison and Jack Hallas look at management as a political process and argue that politics are about redistribution of resources and cannot be taken out of health care management.

Use of intramedullary polypropylene peg for joint stabilization in leprosy

Joint arthrodesis is indicated when motion in a joint cannot be restored, and that joint requires stabilization in an optimal functional position. The Harrision Intramedullary peg has been used to advantage for this purpose in hand reconstruction in leprosy in a renal developing area. It is a method to be considered for selected cases requiring joint stabilization to improve total hand function.

Stabilization of the first metacarpophalangeal and terminal joints of the thumb

The results of the first hundred cases of Arthrodesis of joints of the thumb are presented and reviewed.

Structure and assembly of the capsid of bacteriophage P22

Identification of the genes and proteins involved in phage P22 formation has permitted a detailed analysis of particle assembly, revealing some unexpected aspects. The polymerization of the major coat protein (gene 5 product) into an organized capsid is directed by a scaffolding protein (gene 8 product) which is absent from mature phage. The resulting capsid structure (prohead) is the precursor for DNA encapsidation. All of the scaffolding protein exits from the prohead in association with DNA packaging. These molecules then recycle, directing further rounds of prohead assembly. The structure of the prohead has been studied by electron microscopy of thin sections of phage infected cells, and by low angle X-ray scattering of concentrated particles. The results show that the prohead is a double shell structure, or a ball within a shell. The inner ball or shell is composed of the scaffolding protein while the outer shell is composed of coat protein. The conversion from prohead to mature capsid is associated with an expansion of the coat protein shell. It is possible that the scaffolding protein molecules exit through the capsid lattice. When DNA encapsidation within infected cells is blocked by mutation, scaffolding protein is trapped in proheads and cannot recycle. Under these conditions, the rate of synthesis of gp8 increases, so that normal proheads continue to form. These results suggest that free scaffolding protein negatively regulates its own further synthesis, providing a coupling between protein synthesis and protein assembly.

Repair of extensor pollicis longus using extensor pollicis brevis in rheumatoid arthritis

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