论股权分置改革中的分类表决制度

分类表决制度是我国证券市场的一大制度革新。随着我国股权分置改革的全面推进，分类表决制度也发挥着越来越重要的作用，它赋予流通股股东更多自我保护的权益，对股权分置改革起到有力的推动作用；同时，它也存在着不容忽视的局限性。文中通过具体分析，提出一些建议以供参考。     

出口兔肉备案养殖场追溯体系的建立

从保证动物源性食品安全的角度论述了建立养殖场追溯体系的必要性,以出口兔肉备案养殖场为例,对建立追溯体系的步骤进行了四个方面的探讨。养殖场在设施合理、制度健全的前提下,确定追溯信息的深度、广度和精确度,并作好信息衔接和代码标识,才可使追溯体系有效实施。同时对追溯体系的应用和发展趋势做了基本论述。     

Characterization of Interstitial Cells of Cajal in Bowel of Cattle (Bos taurus)

Interstitial cells of Cajal (ICC) have been described in the gastrointestinal tract of different mammals including humans, horses, pigs, rats, dogs, mice and guinea-pigs. In the present study, ICC were identified in the jejunum of Bos taurus using polyclonal anti-c-Kit antibodies in immunohistochemical assays. Vimentin and desmin intermediate filaments were also determined using monoclonal antibodies. ICC were found in the tunica muscularis either in a palisade distribution pattern between the outer longitudinal and the inner circular layers (ICC-MP) or freely distributed in clusters in the longitudinal layer (ICC-LM). Morphometric studies determined that ICC have a fusiform shape presenting cytoplasmic prolongations. ICC were positive to c-Kit and vimentin antigens but negative to desmin. We have observed and described for the first time the presence of ICC in a ruminant. As observed in the aforementioned mammals, bovine ICC were associated with the myenteric plexus. Nevertheless, the presence of widespread ICC in the longitudinal muscular layer of the jejunum differs from previously described studies of other mammals.     

Evaluation of a canine cranial cruciate ligament repair system for use in equine laryngoplasty

OBJECTIVE: To report the use of a nylon suture system (Canine Cranial Cruciate Ligament Repair System; Securos Inc Veterinary Orthopedics) as a prosthesis for equine laryngoplasty. STUDY DESIGN: Experimental and prospective clinical study. ANIMALS: Cadaver specimens (n = 5) and 7 horses with left laryngeal hemiplegia. METHODS: A commercially available monofilament nylon suture system was implanted as a laryngeal prosthesis. Arytenoid cartilage abduction was achieved with a tensioning device applied to the suture prosthesis during transnasal endoscopic observation. Suture fixation was achieved with crimping clamps and a crimping device. RESULTS: The nylon suture system was suitable as a laryngeal prosthesis for arytenoid cartilage abduction. The ratchet mechanism of the tensioning device facilitated abduction of the arytenoid cartilage and suture fixation was achieved by the crimped clamp without any loss of tension. Postoperatively, there was a slight loss of tension in 4 horses and complete loss of tension in 1 horse because of cartilage failure. After convalescence, none of the horses had abnormal respiratory noise, exercise intolerance or cough. CONCLUSIONS: A nylon suture system designed for canine cranial cruciate ligament repair was used successfully as a laryngeal prosthesis and facilitated control of the degree of arytenoid cartilage abduction during laryngoplasty. CLINICAL RELEVANCE: For improved control of the degree of arytenoid cartilage abduction during laryngoplasty, use of a nylon suture system with metal crimps should be considered.     

动物外激素的研究进展

外激素是生物体向环境释放的一种或多种化学物质的混合物,在环境中起着同种个体间传递信息、引起对方产生特殊反应的一类生物活性物质。在动物中,外激素是应用最广和最古老的通信方式,它们表现的是一种精练过的社会行为和繁殖策略的工具。对外激素在化学特性、产生器官、接受器官、作用及其作用途径方面取得的研究进展作一概述,以亟为该领域的研究提供参考。     

用原子荧光法检测家蚕体内硒的含量及其分布

硒对动物生殖发育、免疫系统具有重要功能,是动物必需微量元素。采用原子荧光法对不同系统家蚕体内硒的含量及其分布进行测定,结果显示:在喂食相同桑叶的情况下,不同系统家蚕品种幼虫体内的硒含量存在显著差异,5龄第4天的中系家蚕品种幼虫体内的硒含量明显高于日系家蚕品种,其中中系家蚕品种19-570体内的硒含量最高。对家蚕品种大造体内硒分布的研究结果表明:精巢中的硒含量明显高于其他组织,头部次之,脂肪体中的硒含量相对较低,由此推测硒在家蚕的生殖发育过程中可能发挥着重要作用。     

藏系绵羊随机扩增多态性DNA最佳反应体系的研究

以高原型藏羊的基因组DNA为模板，通过对RAPD反应体系中的各种参数进行优化试验，建立了适宜于藏系绵羊RAPD分析的最佳反应体系：在PE2400型DNA扩增仪的25μL反应体系中，模板DNA的量为60－120ng，引物量为4－8pmol，Mg^2 浓度为2.0mM，Taq DNA聚合酶为1－2.5U,dNTP浓度为150－200μM;94℃预变性3分钟后35次循环的参数设定为：94℃1分钟，36℃1分钟，72℃2.5分钟，最后72℃延伸10分钟，利用这些条件对藏系绵羊的基因组DNA进行RAPD分析，其结果的重复性和可靠性大为提高。     

肉品加工中应大力推行HACCP管理系统

随着改革开放的不断深入，人们的经济水平的提高，对食品卫生质量，特别是肉品的质量要求也越来越严格，在肉品生产与加工过程中推行HACCP(Hazard Analysis Critical Control P0int)管理系统，对危害肉品安全的主要因素进行全面的分析与控制，对于提高肉品卫生质量，加速我国绿色食品的发展进程，有极其深远的意义。     

鸡血型系统对马立克氏病肿瘤形成的影响

采用 Ａ、 Ｂ、 Ｃ、 Ｄ 血型系统的１０ 种血型因子试剂测定了亚发雏鸡的血型, 并对马立克氏病肿瘤病变与各血型因子的关系进行了研究。结果表明, 在１４ 日龄感染雏鸡的３０ ～６０ 天内, Ｍ Ｄ Ｖ 对各个器官肿瘤病变形成上, 不同的血型系统因子对其影响有很大的差异, 其中带有 Ａ３０８ 、 Ｂ６９１ 因子的雏鸡对 Ｍ Ｄ Ｖ 较易感, 而带有 Ｂ３６５ 因子的雏鸡抗性较强。同样实验还表明, 采用鸡的（ Ｍ Ｈ Ｃ） Ｂ Ｆ Ｉ Ｖ 血型分型试剂与 Ａ、 Ｂ、 Ｃ、 Ｄ 血型试剂检测人工感染 Ｍ Ｄ Ｖ６０ 天后存活鸡表明： Ｂ３６５ 与 Ｂ２１ 均１００ ％ 存在于这些鸡中, 说明二者抗 Ｍ Ｄ 能力有一定的相似性; 说明 Ａ、 Ｂ、 Ｃ、 Ｄ 血型因子可做为选择标记用于抗 Ｍ Ｄ 选育。     

广西动物防疫物资信息管理系统的构建与应用

为实现广西动物防疫物资的信息化管理,适时掌握广西动物防疫物资的流转状况,广西壮族自治区动物疫病预防控制中心开发了“广西壮族自治区动物防疫物资信息管理系统”。该系统为B/S架构,采用JSP技术和MySQL数据库平台。该系统建立后,广西各级动物疫病预防控制机构均可通过互联网登录,及时存储和统计动物防疫物资信息数据,全程监控和实时了解物资流转情况。该系统为广西动物防疫物资的规范化管理提供了重要的技术支持,也为全区重大动物疫病防控提供了坚强的后勤保障。