新型兽医服务体系建设要素

兽医服务体系对畜牧业持续建康发展,动物重大疫病防控,保障公共卫生安全等起着十分重要的作用。论文结合国家对"三农"工作的发展要求,从兽医服务体系改革思路、构建新型体制机制、提升兽医专业技能水平、政策支持,建立有效的财政保障运行机制、推广普及和新技术应用、完善兽医法律体系建设和兽医信息化建设等方面进行了论述,以期为人类和社会提供更好的服务。     

Detecting endotoxin activity in bovine serum using an automated testing system

The aim of the present study was to compare the ability of the commercially available portable test system (PTS^TM) to detect endotoxin activity in bovine serum, with that of the traditional LAL-kinetic turbidimetric (KT) and chromogenic (KC) assays. Prior to testing, serum samples, which were obtained from endotoxin-challenged cattle, were diluted 1:20 in endotoxin-free water and heated to 80°C for 10 min. The performance of the PTS^TM was not significantly different from that of the traditional LAL-based assays. The results using PTS^TM correlated with those using KT (r²=0.963, P<0.001) or KC assays (r²=0.982, P<0.001). Based on these findings, the PTS^TM could be applied as a simplified system to assess endotoxin activity in bovine serum.     

无透明带体细胞核移植研究进展

目前,体细胞核移植主要还是沿用Willadsen发明的显微操作的去核、注核、融合和激活来完成。由于其核移植效率较低,且对仪器设备和技术人员的要求较高,因此,简化并建立一套更适合于生产条件下的体细胞核移植程序,从而提高核移植效率一直是人们所不懈努力的。作者就无透明带核移植技术和单个胚胎培养系统作一介绍。     

牧草抗旱性综合评价指标体系的AHP模型设计与应用的研究

在查阅大量牧草抗旱性鉴定指标研究资料的基础上,应用层次分析法（ＡＨＰ模型,ＡｎａｌｙｔｉｃＨｉｅｒ－ａｒｃｈｙＰｒｏｃｅｓｓ）理论,根据专家咨询系统的反馈信息,对所选择的６类抗旱性鉴定指标及其２１个指标变量,进行比较判断矩阵的构建和计算,定量确定了各指标变量在牧草抗旱性综合评价体系中的权重及重要程度次序。     

高寒草地畜牧业产业化的障碍与实现路径——以甘南州合作市为例

草地畜牧业是合作市的主导产业,受自然条件和社会经济发育程度的深刻影响,农牧业经济要素互补性差;畜牧业内部同构性较强,区域分工不明显;畜产品的商品化过程粗放、低质、低效;畜产品加工企业门类不全,规模不大,带动性差;普遍缺少各种形式的中介机构和协会,农牧民自组织能力不足;缺少交易市场,要素流动受阻,致使畜牧业产业化进程缓慢。因此,在保护草原生态环境的前提下,加强基地建设,大力发展龙头企业,强化农牧业服务体系,实现草地畜牧业向现代畜牧业转型。     

重庆上市公司互保圈现象的会计思考

在市场经济环境下，贷款担保作为上市公司融通资金的一种方式，是企业的一种正常的经营行为。它可以减少交易风险、促进资本市场发展。然而，目前由于种种原因，上市公司互保不仅没有起到化解市场风险的作用，反而加大了证券市场和金融市场的风险，严重扰乱了资本市场的正常运行。因此，本文拟通过思考重庆“互保圈”现象，分析“互保圈”形成的原因及危害，并由此提出相应的对策与建议。     

Lens formation in the absence of optic cup in rat embryos irradiated with soft X-ray

In order to investigate the effect of soft X-ray irradiation on ocular development, pregnant rats were exposed to a single 12.5 Gy irradiation on embryonic day 9 (ED 9). The embryos obtained by laparotomy on ED 12 and 21 were examined for ocular abnormalities under a binocular stereo-microscope and a light microscope. The ED 12 embryos were stained with osmium tetroxide to facilitate the observation. The stereo-microscopic examination on ED 12 and 21 revealed various types of ocular abnormalities characterized primarily by aplasia or hypoplasia of the optic cup and invaginated lens placode. The light microscopic examination further confirmed these findings histomorphologically, and the hypoplastic abnormalities were classified into three types: (1) hypoplasia of the optic cup and invaginated lens placode, (2) complete malformation of the optic cup and hypoplasia of the invaginated lens placode, and (3) complete malformation of the optic cup and invaginated lens placode. Because the lens was formed in the complete absence of the retina, the development and differentiation of the retina and lens do not seem to be tightly synchronized. Thus, this sequential analysis on ocular abnormalities during the early stage of development supports the notion that the presence of the retina is not always necessary for the development of the lens.     

陇西南塬区农业生产系统结构与效益研究

本研究通过对陇西南塬区农业生产系统的结构分析，确认该系统的特征为产业结构不合理（以种植业为主），种植业以粮食生产为主，复种指数低（１１１％）；养殖业中草食家畜比例低，饲养技术落后，良种率低；林果业效益低下；人口密度高，劳动力过剩，生产能源短缺等。通过系统分析提出了调控方针，该系统整体效益提高的关键是发展以草食家畜为核心的养殖业，种植业应及时调整结构，提高经济作物和饲料作物的比例，提高复种指数，林果