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日本紫花牵牛(Pharbilisnilcv.Violet)子叶完全展开后,短日照诱导前、诱导后和两个短日照间的长日照处理对植株的花芽分化都有一定的抑制作用。双向凝胶电泳分析表明,长日照处理的牵牛子叶内存在着短日照处理子叶内没有的两种蛋白质(pI4.1,MW16.5kD;pI4.2,MW16.5kD)。这些蛋白质可能与长日照抑制牵牛植株的花芽分化有一定关系。 相似文献
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不同生长期蛋鸡的体脂水平和肝脏脂肪酸合成酶活性的关系 总被引:1,自引:0,他引:1
不同生长期蛋鸡的体脂水平和肝脏脂肪酸合成酶活性的关系田维熙,董妍,权晖,陈文峰(中国科学院研究生院生物教学部,北京100039)动物体脂的控制是一个复杂过程.不同种类不同年龄的动物体脂水平有很大差异,控制机制是什么,哪些是关键的控制因素?不久前我们曾... 相似文献
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Laminin and Neuropeptide Y Are Increased by Synapsin Transfection in Cultured NG108-15 Neuroblastoma/Glioma Hybrid Cells 总被引:2,自引:0,他引:2
† Gabriel Fried Hui Quan Han ‡Björn Meister ‡Tomas Hökfelt Paul Greengard 《Journal of neurochemistry》1995,64(6):2674-2680
Abstract: We have investigated the presence and expression of laminin and neuropeptide Y (NPY) in several NG108-15 cell lines transfected with synapsin Ib, IIa, or IIb. The content of laminin, a basal membrane glycoprotein that promotes adhesion and induces neurite outgrowth and neuronal differentiation, was increased in all transfected cell lines examined. In cells that were chemically differentiated with prostaglandin E1 plus 3-isobutyl-1-methylxanthine, laminin levels were increased even further. The content of NPY, suggested to be a neurotransmitter/neuromodulator in peripheral sympathetic neurons as well as in central neurons, was also increased in all transfected cell lines examined. Immunohistochemical analysis combined with confocal laser microscopy showed that NPY staining was granular and very often enriched in neuritic varicosities. The distribution and the staining pattern of NPY were consistent with storage of NPY in large dense-cored vesicles. The results indicate that, in differentiated neurons, the synapsins increase the levels of a neuropeptide transmitter stored in large dense-cored vesicles and of an extracellular matrix protein associated with neuronal maturation. 相似文献
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黑龙江省东宁县山区蜱类的生态调查 总被引:2,自引:0,他引:2
我国东北地区有的蜱种已证实是传播森林脑炎、北亚蜱传斑疹伤寒的媒介。近年来,国内文献又报导了从东北牡丹江林区发现了莱姆病(Lyme Disease)病人,病人都有被婢咬史,并从全沟硬蜱(Ixodes persulcatus)的中 相似文献
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A Yersinia enterocolitica serotype 9 was isolated from pond water; Y. enterocolitica-like bacteria were also isolated from pond water and from three species of snails (Lymnaea palustris elodes, Helisoma sp., Oxyloma retusa) from the Edwin S. George Reserve in southeastern Michigan. There was evidence for biochemical stability among some of the organisms over a period of years. There also was evidence of transmission of these organisms to snails from the water. 相似文献
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Methoxyflurane has been used for general anesthesia at The Montreal Children''s Hospital since its clinical introduction in 1960, and has been administered to more than 5000 patients undergoing most types of pediatric operations. From a study of the records of more than one-half of these patients, a clinical impression of its usefulness has been obtained.When vapourized in a standard ether apparatus it appears to have the same high degree of safety as ethyl ether. It differs from ether in that it is non-explosive, less noxious and less irritating upon inhalation, depresses ventilation more and produces little postoperative vomiting.While the present trend is to employ more labile or less potent inhalation anesthetics, this development is not completed in children and methoxyflurane is a good modern substitute for ether, if pulmonary ventilation is supported when this is indicated. 相似文献