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。     

Effects of dobutamine on cardiovascular function and oxygen delivery in standing horses

Dobutamine is routinely used to improve cardiovascular function in anaesthetized horses. However, dobutamine in conscious horses is insufficiently investigated. Ten research horses that were already instrumented for a preceding trial were included into the study. Cardiovascular variables were recorded and blood samples taken after instrumentation (Baseline), before starting dobutamine and after 10 min of dobutamine infusion (2 µg kg⁻¹ min⁻¹). A significant increase in systemic blood pressure, mean pulmonary artery pressure and right atrial pressure, and a decrease in heart rate were observed with dobutamine compared with baseline measurements. Arterial and mixed venous haemoglobin and oxygen content, as well as mixed venous partial pressure of oxygen increased. No significant changes in cardiac output, stroke volume, systemic vascular resistance, arterial partial pressure of oxygen, or oxygen consumption, delivery and extraction ratio were detected. Concluding, dobutamine increased systemic blood pressure without detectable changes in stroke volume, cardiac output or systemic vascular resistance in conscious horses.     

草坪业从业人员资质考试制度的构想

通过分析我国草坪业在草坪的建植与养护方面存在的一系列问题,并指出产生这些问题的原因在于没有相应的法规和制度保证从业人员的理论和技术素质、草坪界落后的再教育无法保证工程技术人员,知识和技术的更新以及草坪业强烈的商业化色彩影响了草坪学术界的健康发展,从而无法保证草坪建植技术水平的提高;提出了在我国加入WTO(世界贸易组织)后应顺应各个行业持证上岗的潮流设立草坪业从业人员资质考试认证制度以应对草坪业日趋激烈的市场竞争,并对这一制度进行了技术可行性分析。     

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.     

西北牧区灌溉人工草地适宜发展规模分析

针对西北牧区水资源和草地资源已被超极限利用的现状,应用水草畜平衡原理,分析了西北牧区灌溉人工草地的发展规模,提出了西北牧区灌溉人工草地适宜发展规模为215.76～239.71万hm^2,载畜量控制在13833.18万羊单位之内即可实现草畜平衡,总体可达到人工种植冷季补饲水平。新增灌溉需水量约为71.85～83.55亿m^3,占2000年灌溉总用水量（777亿m^3）的9.25%～10.75%。解决这一灌溉需水量的可行途径是建设节水型社会,提高水资源利用效率。     

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。     

3种冷季型草坪草混播配方优化组合筛选试验

在河西走廊中部地区气候条件下,通过对草地早熟禾Poa pratensis、高羊茅Festuca arundinacea、多年生黑麦草Lolium perenne3种冷季型草坪草18种混播配方进行了成坪品质的观察测定,筛选出了适应当地气候条件的优化组合配方10个。     

自适应模糊控制在配料过程中的研究与应用

针对工业配料过程中配料精度和速度相矛盾的难题,文中提出了一种专家系统、模糊控制结合自适应控制的新型控制方法。该方法将模糊控制宽范围快速调节和自适应精确调节的特点有机结合起来,当系统偏差大于某一设定值时,采用专家经验和模糊规则控制相结合的控制方法;当系统偏差小于设定值时采用自适应控制。实际应用表明,该方法比一般的模糊控制在系统精度和速度上均有所提高。     

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。     

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。