辽西蜂胶中一新的桂皮酸酯成分的分离与鉴定

辽西蜂胶中一新的桂皮酸酯成分的分离与鉴定迟家平陈海生薛秉文（中国人民解放军第２０５医院，锦州１２１００１；第二军医大学药学院，上海２００４３３）蜂胶（ｐｒｏｐｏｌｉｓ）是蜜蜂采集植物幼芽中的树脂并混入其上颚腺分泌物及蜂蜡等加工而成的一种天然物质，...     

Inappropriate traditional treatment resulting in limb amputation

Four cases are described where inappropriate treatment by the traditional Nepali spiritualist healer or jhankri resulted in amputation of a previously healthy limb. Such treatments may involve the use of tourniquets, burning, scarification and herbal remedies.     

Renovascular hypertension as a complication of umbilical arterial catheterization

Renovascular hypertension (RVH) in the neonatal period is frequently associated with thromboembolic complications of umbilical artery catheterization. Seven newborn infants with RVH were studied by angiography and/or radionuclide examination. Aortography and, in one case, selective angiography showed variable degrees of renal artery occlusion or attenuation. Thromboembolic defects were frequently present in other vessels. Radionuclide flow studies, renograms, and computer analysis of data (ADAC) demonstrated defects in renal function, indicative of renal ischemia. There was a high degree of correlation between angiographic and radionuclide studies. Successful medical management suggests a more conservative alternative to nephrectomy in the hypertensive newborn.     

Quantitation of human in vitro megakaryocytopoiesis by radioimmunoassay

The isolation and characterization of human megakaryocyte growth factors has been hampered because evaluation of megakaryocyte growth in semisolid medium requires both lengthy incubation and visual quantitation. In addition, colony formation requires cell division, while most regulation of platelet production may involve individual, nonproliferating differentiating megakaryocytes. We have developed a radioimmunoassay (RIA) that makes use of an iodinated murine monoclonal antibody (MoAb) specific for platelet/megakaryocyte glycoprotein IIb/IIIa (GPIIb/IIIa) to measure megakaryocyte production in liquid marrow culture. This assay is sensitive to 3 X 10(3) platelets (roughly 30 megakaryocytes) and linear up to 1 X 10(6) platelets, and thus it provides a useful range for quantitating megakaryocyte production in in vitro marrow culture. Significant differences (threefold to fivefold) in megakaryocyte/platelet-specific GPIIb/IIIa complex are detected between stimulated and unstimulated marrow cultures by day 7, although antigen accrual in stimulated cultures continues through at least day 16. Conditions that promote megakaryocyte growth in semisolid medium (ie, aplastic plasma and PHA-LCM) have also been facilitory in liquid culture. This rapid and sensitive assay for cell-bound GPIIb/IIIa should facilitate recognition and isolation of megakaryocyte and platelet growth factors.     

Exercising caution: social physique anxiety and protective self-presentational behaviour

This study examined relations among body mass index (BMI), social physique anxiety (SPA) and protective self-presentational exercise behaviours in a sample of 86 female participants in aerobics classes at a university fitness centre. Participants completed a questionnaire assessing demographic and exercise-related information, the 9-item version of the Social Physique Anxiety Scale, and measures of two forms of protective self-presentational exercise behaviour (i.e., preferring to stand away from the aerobics instructor and wearing concealing exercise attire). Consistent with previous research, SPA was positively associated with both preferred exercise studio floor position (r = .31, p < .05) and clothing concealingness (r = .25, p < .05). SPA did not mediate the relations between BMI and either of the two protective self-presentational behaviours. BMI was a better predictor of clothing concealingness than SPA, but the opposite was found for exercise studio floor position preferences (r = .31 with SPA versus r = .15 with BMI). The findings provide an enhanced understanding of factors associated with self-presentation in exercise.