搜索结果: 1-11 共查到“知识库 形态生理学”相关记录11条 . 查询时间(4.427 秒)
贝氏高原鳅胚胎和仔鱼的形态发育
贝氏高原鳅 胚胎 仔鱼 形态发育
2009/8/26
通过人工授精获得受精卵，对贝氏高原鳅胚胎和仔鱼的发育过程进行了观察和描述。结果表明，成熟卵淡黄色，卵径较小(直径0.94－1.10mm)，遇水后产生强黏性。在水温9.0－12.8℃下，胚盘在受精后4h20min开始分裂，在19h50min和27h40min时达到囊胚期和原肠期，64h40min胚孔封闭，287h时部分胚胎开始出膜，405h30min全部出膜。初孵仔鱼全长(4.32±0.23)mm，...
白鲢的鳞长与体重及外部形态性状的关系
白鲢 鳞长 体重 外部形态性状
2008/3/13
为了全面地了解鱼类鳞片在鱼类生长及鱼类学的研究中的作用，本文研究了白鲢的鳞片生长与体重及形态可置性状生长的关系。结果表明:白鲢的鳞长与体重、鳞长与24个形态可置性状都呈显著的相关关系，可以从鳞片材料上反映出白鲢体型的基本特征和生长情况。在每尾鱼体上，只要测得体长、全长及鳞长便可预测此尾鱼其它可置性状及体重的数值。这将给鱼类数量分类学及鱼体生长的研究提供简捷方便的途径。本文还讨论了白鲢的长度与体重关...
人的Y染色体异染色质与形态生理学变异
Y染色体 异染色质 形态生理学,变异 人类
2008/2/1
摘要对55名Y染色体具有形态上相同的、异染色质几乎全部缺失的男性和55名Y染色体正常的男性 进行了80项形态生理学性状的研究。发现在这两个组之间大部分性状的平均值并无显著性差 异，但有些血液学指标有显著差异。用模式认辨法确定出20个性状的组合可以区分这两个组 ，其认辨误差为4.6%。认辨系统包括的有价值的性状为心电图指标(占性状的25%)、某些人 类学指标、血液学指标和个体年龄。结果表明，Y染色体...
摘要：（在非繁殖期高密度大沙鼠(Rhombomys opimus Licht)种群中，我们研究了胁迫以及幼年雄鼠的性激素浓度、腹中腺大小和体重对社群中成体（>1年龄）存在的依赖性。用无损伤放射免疫方法，测定了于1999年秋天在野外采集的幼年雄鼠粪便样品的皮质酮和睾酮。有成体存在社群中的个体大于没有成体存在的社群个体。因此，成体对幼体的影响不能独立于社群大小本身。成体的存在促进了粪便睾酮的浓度...
Four-vessel occlusion model,Both vertebral arteries are cauterized,Both common carotid arteries are clamped,Duration of ischemia: 15–30 min.
Signaling mechanisms implicated in the transduction of proapoptotic and antiapoptotic signals after stimulation of tumor necrosis factor receptor 1. Protein domains essential for protein-protein inter...
Research methods,Specific and selective gap junction inhibitors,Traditional inhibitors: nonspecific,Halothane, octanol, glycyrrhizic acid metabolites,Gap-junctional blocking peptide,Glycoconjugate: a ...
Coronary microembolization does not induce acute precon ditioning against infarction in pigs—the role of adenosine
Adenosine Preconditioning Microcirculation
2014/3/31
After coronary microembolization (ME) adenosine is released from ischemic areas of the microembolized myocardium.
This adenosine dilates vessels in adjacent nonembolized myocardium and increases coro...
Replacement of Connexin40 by Connexin45 in the Mouse Impact on Cardiac Electrical Conduction
gap junction channels
2014/3/31
Gap junction channels, required for the propagation of cardiac impulse, are intercellular structures composed of
connexins (Cx). Cx43, Cx40, and Cx45 are synthesized in the cardiomyocytes, and each o...
Endothelial nitric oxide synthase overexpression attenuates congestive heart failure in mice
oxide synthase overexpression mice
2014/3/31
Congestive heart failure results in cardiovascular dysfunction and
diminished vascular nitric oxide (NO) production. We hypothesized
that overexpression of endothelial NO synthase (eNOS) within the
...
Matrix metalloproteinase-2 mediates cytokine-induced myocardial contractile dysfunction
Contractile function Cytokines
2014/3/31
Pro-inflammatory cytokines depress myocardial contractile function by enhancing peroxynitrite production, yet the
mechanism by which peroxynitrite does this is unknown. As matrix metalloproteinases (...