Now showing items 414-433 of 5878

    • C.elegans中dyn-1基因对寿命和发育的影响 

      曹蕾; 杨玉荣 (《中国细胞生物学学报》编辑部, 2012-08)
      [中文文摘]细胞极性对于细胞的多样性起着很重要的作用。发动蛋白是一个大的GTP酶,作用于胞吞作用和肌动蛋白的动力学过程。C.elegans中发动蛋白的同源基因dyn-1起着维持早期细胞极性的功能。我们对C.elegans中dyn-1基因进行了克隆,并构建到表达载体和RNAi载体中。经IPTG诱导表达得到了约90 kDa的DYN-1融合蛋白。同时,利用RNAi方法研究了dyn-1基因沉默后对三种线虫虫株N2、daf-2(e1370)和da ...
    • C.elegans野生型和par突变体早期胚胎卵裂的观察 

      傅兴; 杨玉荣 (2005-12-20)
      不对称分裂在动植物的发育中起到了非常重要的作用。Caenorhabditiselegans(C.elegans)胚胎最早的两次卵裂为研究控制不对称分裂的机制提供了很好的机会。用普通光学显微镜观察了野生型胚胎早期卵裂和par-1、par-2、par-3、par-4突变体胚胎的早期卵裂。野生型胚胎最早的分裂是不等的,产生了两个不同大小的子细胞。两个子细胞又以不同的方向进行第二次分裂。在C.elegans中任意一个par基因的缺失会使胚胎的第 ...
    • C3/Ig and Ig/C3 two-component-determined circulating immune complexes (TCIC) in patients with HCV infection 

      Wang, SY; Yang, TC; Zhang, JY; Xiao, SG; Peng, XX; 王三英 (FEMS IMMUNOL MED MIC, 2003-05-15)
      In the present study, we measured the levels of immunoglobulin (Ig)- and complement 3 (0)-determined circulating immune complexes (two-component-determined CIC, or TCIC) in hepatitis C virus (HCV)-infected patients. TCIC ...
    • C3Ig and IgC3 two-component-determined circulating immune complexes (TCIC) in patients with HCV infection 

      Wang, SY; 王三英; Yang, TC; Zhang, JY; Xiao, SG; Peng, XX; 彭宣宪 (ELSEVIER SCIENCE BV, 2003)
      In the present study, we measured the levels of immunoglobulin (Ig)- and complement 3 (0)-determined circulating immune complexes (two-component-determined CIC, or TCIC) in hepatitis C virus (HCV)-infected patients. TCIC ...
    • C_3植物稳定碳同位素组成与盐分的关系 

      韦莉莉; 严重玲; 叶彬彬; 郭晓音 (2008-03-15)
      植物在盐生环境中δ13C值的改变可能包含两个成分:一个是盐分对CO2的扩散、传递或光合速率的影响而引起的δ13C值的改变;另一个是光合途径的转换引起的δ13C值的变化,δ13C值的大小与诱导发生CAM或C4代谢的程度有关。植物组织的δ13C值随盐度的变化趋势除了与植物本身固有的耐盐性有关以外,盐度和胁迫时间是影响植物δ13C的重要因素。根据盐生条件下同位素分馏特点可知,盐生植物与非盐生植物的δ13C随盐度的变化趋势有所不同。对非盐生植物 ...
    • Ca (NO3) 2 对NaCl 胁迫下木麻黄扦插苗生理特征的调控 

      梁洁; 严重玲; 李裕红; 张瑞峰; 朱珠 (生态学报, 2004)
      用不同浓度Ca (NO 3) 2·4H2O (017、114、211g Ca2+ ök g 土) 对1 年生的处在两种N aCl 胁迫(10 和20gök g) 处理下的木麻 黄扦插苗进行化学调控, 研究硝酸钙盐加氯化钠处理的木麻黄幼苗的生长量、木麻黄幼苗抗氧化酶系统活性和渗透调节物质的 含量的变化, 研究结果表明: 中度N aCl 胁迫加硝酸钙处理下的木麻黄扦插苗的可溶性蛋白质含量增加,MDA 含量降低说明膜 脂过氧化作用减轻, ...
    • Ca(NO_3)_2对NaCl胁迫下木麻黄扦插苗生理特征的调控 

      梁洁; 严重玲; 李裕红; 张瑞峰; 朱珠 (2004-05-25)
      用不同浓度 Ca(NO3) 2 · 4 H2 O(0 .7、1.4、2 .1g Ca2 + / kg土 )对 1年生的处在两种 Na Cl胁迫 (10和 2 0 g/ kg)处理下的木麻黄扦插苗进行化学调控 ,研究硝酸钙盐加氯化钠处理的木麻黄幼苗的生长量、木麻黄幼苗抗氧化酶系统活性和渗透调节物质的含量的变化 ,研究结果表明 :中度 Na Cl胁迫加硝酸钙处理下的木麻黄扦插苗的可溶性蛋白质含量增加 ,MDA含量降低说明膜脂过氧化作用减轻 ...
    • Ca--(2+)与CaM对大白菜离体叶圆片Ca--(2+)-ATPase和β-1,3-葡聚糖合成酶活性的影响(简报) 

      缪颖; 曾广文; 朱祝军 (1999)
      经 CA--(2+)与 CAM促进剂和抑制剂处理的大白菜离休叶圆片,其细胞膜 CA--(2+)ATPASE活性同时受CA--(2+)与CAM的调节,而β-1,3-葡聚糖合成酶活性仅受 CA--(2+)的调节,与 CAM无关。
    • cagA(+)Hp圆球体实验动物模型的建立 

      方莹; 张长弓; 陈福; 杨善民; 王昆 (2003-06-20)
      目的 建立Hp圆球体动物模型。 方法 通过去营养法来培养cagA(+)Hp圆球体 ,定期用MTT和SCC方法来检测细菌的代谢活性 ,用吉姆萨染色和电镜负染色来观察细菌在不同时期的形态和变化。在圆球体培养的第 7周 ,进行幽门螺杆菌及其圆球体经口感染裸鼠的实验。结果 通过细菌学、尿素酶实验、16SRNA、cagA(+)PCR检测和电镜负染色等方法确定从已喂服幽门螺杆菌及其圆球体的裸鼠胃里分离到的细菌克隆 ,经证实为cagA(+)Hp。 ...
    • Calcineurin enhances MAPK phosphatase-1 expression and p38 MAPK inactivation in cardiac myocytes 

      Lim, H. W.; New, L.; Han, J. H.; Molkentin, J. D.; 韩家淮 (2001)
      Multiple intracellular signaling pathways have been shown to regulate the hypertrophic growth of cardiac myocytes including mitogen-activated protein kinase (MAPK) and calcineurin-nuclear factor of activated T-cells. ...
    • Calcineurin negatively regulates TLR-Mediated activation pathways 

      Young Jun Kang; Brenda Kusler; Motoyuki Otsuka; Michael Hughes; Nobutaka Suzuki; Shinobu Suzuki; Wen-Chen Yeh; Shizuo Akira; Jiahuai Han; Patricia P. Jones; 韩家淮 (2007)
      In innate immunity, microbial components stimulate macrophages to produce antimicrobial substances, cytokines, other proinflammatory mediators, and IFNs via TLRs, which trigger signaling pathways activating NF-kappa B, ...
    • Calcitonin immunostaining in monkey uterus during menstrual cycle and early pregnancy 

      Hong-Lu Diao; Shi-Jie Li; Hong-Bin Wang; Zeng-Ming Yang; 杨增明 (2002)
      Calcitonin has been shown to be a progesterone-regulated potential marker of the receptive endometrium in the rat and human. The present study was undertaken to immunohistochemically investigate the changes in calcitonin ...
    • Calcium and calcium receptor CAS promote Arabidopsis thaliana de-etiolation 

      Huang, S. S.; Chen, J.; Dong, X. J.; Patton, J.; Pei, Z. M.; Zheng, H. L.; 郑海雷 (2012-01)
      As a second messenger, the free cytosolic calcium ion (Ca2+) plays important roles in many biochemical and physiological processes including photosynthesis in plants. In this study, we investigated morphological changes, ...
    • Calcium changes during megasporogenesis and megaspore degeneration in lettuce (Lactuca sativa L.) 

      Xie, Chao Tian; Tian, Hui Qiao; 田惠桥; Qiu, Yi Lan(Hunan Normal Univ); Liu, Ru Shi(Hunan Normal Univ); Russell, Scott D.( Univ Oklahoma) (SPRINGER, 2008)
      Potassium pyroantimonate was used to localize loosely-bound calcium in young ovules of lettuce (Lactuca sativa L.) during megasporogenesis to investigate the relationship between ionically available calcium and megaspore ...
    • Calcium changes in ovules and embryo sacs of Plumbago zeylanica L 

      Tian, H. Q.; Zhu, H.; Russell, S. D.; 田惠桥 (2000)
      Calcium was localized in ovules of Plumbago zeylanica from 1 day before anthesis to 3 days after anthesis using potassium antimonate and transmission electron microscopy in pollinated and emasculated flowers. At 1 day ...
    • Calcium distribution in developing anthers of lettuce (Lactuca sativa) 

      Qiu, Yi-Lan(Hunan Normal Univ, Sch Life Sci); Liu, Ru-Shi(Hunan Normal Univ, Sch Life Sci); Wei, Dong-Mei; Tian, Hui-Qiao; 田惠桥 (FINNISH ZOOLOGICAL BOTANICAL PUBLISHING BOARD, 2009)
      Potassium antimonite was used to locate calcium in the anthers of lettuce (Lactuca sativa). There are no calcium precipitates in young anthers. After meiosis of microspore mother cells, calcium precipitates first appear ...
    • Calcium distribution in fertile and sterile anthers of a photoperiod-sensitive genic male-sterile rice 

      Tian, H. Q.; Kuang, A. X.; Musgrave, M. E.; Russell, S. D.; 田惠桥 (1998)
      Potassium antimonate was used to locate Ca2+ in fertile and sterile anthers of a photoperiod-sensitive genic male-sterile rice (Oryza sativa L. japonica). During the development of fertile anthers, abundant calcium ...
    • Calcium distribution in fertilized and unfertilized ovules and embryo sacs of Nicotiana tabacum L 

      Tian, H. Q.; Russell, S. D.; 田惠桥 (1997)
      Potassium antimonate was used to localize Ca2+ in tobacco ovules from 0 to 7 d after anthesis in pollinated and emasculated flowers. Antimonate binds ''loosely bound'' Ca2+ into calcium antimonate; less-soluble forms are ...
    • Calcium distribution in the stigmas and styles of lettuce (Lactuca sativa) 

      Wei, D. M.; Qiu, Y. L.; Liu, R. S.; Tian, H. Q.; 田惠桥 (2010-10-29)
      Antimonite precipitation was used to detect Ca(2+) in the stigmas and styles of lettuce (Lactuca sativa) before and after pollination. Abundant calcium precipitates were detected in the papillae walls on the receptive ...
    • Calcium function and distribution during fertilization in angiosperms 

      Ge, Li Li; Tian, Hui Qiao; 田惠桥; Russell, Scott D.(Department of Botany and Microbiology, University of Oklahoma, Norman, Oklahoma 73019 USA ) (BOTANICAL SOC AMER INC, 2007)
      Calcium has an essential signaling, physiological, and regulatory role during sexual reproduction in flowering plants; elevation of calcium amounts is an accurate predictor of plant fertility. Calcium is present in three ...