Cannflavin A and B,prenylated flavones fromCannabis sativa L.

Summary Two novel prenylat flavones, termed Cannflavin A and B, were isolated from the cannabinoid free ethanolic extract ofCannabis sativa L. Both compounds inhibited prostaglandin E₂ production by human rheumatoid synovial cells in culture.This communication is dedicated to the memory of the late Professor J. W. Fairbairn and the late Dr. J. T. Pickens. We are grateful to the Medical Research Council for a project grant and to Ms J. Elliot of King's College London for NMR spectra.     

Cytosolic free Ca2+ in insulin secreting cells and its regulation by isolated organelles

Summary The role of Ca²⁺ in secretagogue-induced insulin release is documented not only by the measurements of⁴⁵Ca fluxes in pancreatic islets, but also, by direct monitoring of cytosolic free Ca²⁺, [Ca²⁺]_i. As demonstrated, using the fluorescent indicator quin 2, glyceraldehyde, carbamylcholine and alanine raise [Ca²⁺]_i in the insulin secreting cell line RINm5F, whereas glucose has a similar effect in pancreatic islet cells. The regulation of cellular Ca²⁺ homeostasis by organelles from a rat insulinoma, was investigated with a Ca²⁺ selective electrode. The results suggest that both the endoplasmic reticulum and the mitochondria participate in this regulation, albeit at different Ca²⁺ concentrations. By contrast, the secretory granules do not appear to be involved in the short-term regulation of [Ca²⁺]_i. Evidence is presented that inositol 1,4,5-trisphosphate, which is shown to mobilize Ca²⁺ from the endoplasmic reticulum, is acting as an intracellular mediator in the stimulation of insulin release.     

具广义单调Fourier系数函数的L′收敛和L′逼近

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浅谈WIN2K终端技术的应用

介绍了一种利用WIN2K终端技术让闲置的低配置PC机实现网络工作的解决方案.     

Specific radioimmunoprecipitation of histone H2A antigens by protein A conjugated sepharose

Summary A modified radioimmunoprecipitation technique is described which allows the specific detection of histone H2A antigens. The technique circumvents unspecific binding of histones to the bacterial adsorbent.     

多日神话原型及寓意探析

中华文化圈有着丰富的太阳母题神话。多日神话乃其中之经典篇章。完整的多日神话包括生日、多日和征日三部分。古代典籍中均仅存片断,各民族传说中保存得相对完整。对于多日神话原型和寓意的阐释,“酷热干旱说”、“十干历法说”、“诸日部族称王说”等都不够圆满。其实,这个神话保存了古代先民的原始记忆,是对远古时代“幻日”这种自然天象的一种幻想性解释。最新的“多日并出”现象为之提供有力的证据。这个神话的深刻寓意则与原始宗教有关,它折射出我国古代先民自然崇拜中的日神信仰。     

ZQSn10—2合金致密性的研究

本文采用加合金元素铋的方法对ＺＱＳｎ１０－２合金致密性进行了研究，结果表明加入适量的金属性能大大提高ＺＱＳｎ１０－２合金的耐油压性能。     

Cs_2NaPrCl_6:Pr~(3+)离子谱的晶场分析

本文对 C s_2NaPrCl_6类型的含 Pr~(3+)的稀土络合物,在较接近实际对称 C(4h)近似下,用配位场方法研究了它们的能谱,所得结果与光谱实验值符合较好.