我国与欧盟肠衣技术性贸易措施比较

通过分析我国出口肠衣受阻原因,以及国际肠衣技术要求、中欧(中国及欧盟)肠衣安全限量发现:欧盟肠衣技术壁垒越来越严格,涉及范围扩大,影响面广,具有明显的贸易保护特征和连锁扩散效应;我国技术性贸易保护体系存在生产基础弱、标准体系技术性差、行业协会作用不明显、出口企业应对能力不足,以及与欧盟的贸易保护实力不对等问题。需要构筑三位一体的战略应对体系:政府负责政策制定、谈判和组织管理工作,行业协会发挥标准制定、行业预警和中介协调作用,出口生产企业承担主体责任。同时,监管部门还需加强监管,逐步健全和提高市场准入标准。     

中药防治野鸭大肠杆菌病的临床效果试验

2006年7月，浙江省桐乡市某野鸭场突然发生疫病，通过病死雏鸭进行实验室诊断，确诊为鸭大肠杆菌病；进行药敏试验检测，结果表明分离菌对试用中药高度敏感，而对庆大霉素、青霉素、链霉素、氨苄青霉素等抗生素已产生耐药，经大群治疗和预防试验，证实该中药对鸭大肠杆菌病的治疗试验组治愈率达63．2％，对照组死亡率达73．7％。     

Serum antibody responses to vaccinal antigens in lean and obese geriatric dogs

The immune responses in control dogs [1 to 4 years of age, body condition score (BCS): 4 to 5 out of 9] were compared to those of aging dogs (based on breed and body size) either categorized as lean (BCS: 4 to 5 out of 9) or obese (BCS: 8 to 9 out of 9). Of interest were the serum titers to the following common agents found in vaccines, canine parainfluenza virus (CPIV), canine parvovirus (CPV), canine distemper virus (CDV), canine respiratory coronavirus (CRCoV), and Bordetella bronchiseptica. There were no statistical differences in the antibodies to CPIV, B. bronchispetica, and CRCoV, among the age/weight categories, nor among the age/weight categories and the time, in days, between the date of sample collection and the date of the last recorded vaccination for CPIV, B. bronchiseptica, CPV, and CDV. For CPV, the control dogs had significantly (P < 0.002) higher serum neutralization (SN) titers than the lean geriatric dogs and the obese geriatric dogs. For CDV SN titers, the only statistically significant (P = 0.01) difference was that the control dogs had higher SN titers than the lean geriatric dogs.     

A comparative study on the rumen microbial populations,hydrolytic enzyme activities and dry matter degradability between different species of ruminant

A comparative study among Korean native cow (Hanwoo), Holstein dairy cow, Korean native goat and crossbred sheep on the population and marker concentration of ruminal microbes, the activities of carboxymethylcellulase (CMCase), xylanase and amylase, and in situ dry matter (DM) degradability were conducted. Twelve ruminally cannulated animals, three of each species, were used. Animals were fed the same diet containing 40% formula feed and 60% rice straw at the level of 2.5% of body weight. Total viable microbial populations in the rumen fluid were significantly (P < 0.01) greater for bacteria and fungi in goat than those of Holstein. The protozoan population among ruminant species was the reverse from that of bacteria. The concentrations of 2,6‐diaminopimelic acid and chitin as markers for bacteria and fungi in the rumen fluid, respectively, were highest in goat, which is in accordance with the above population data. The concentration of aminoethylphosphonic acid as marker of protozoa was highest in Hanwoo and lowest in sheep (P < 0.01). Goat had the highest (P < 0.01) activities of all the enzymes investigated among ruminants. In situ effective degradation of the DM of rice straw was approximately 19% higher in the rumen of goat compared with other animals.     

生物活性肽的制备、功能及在动物生产中的应用研究进展

本文从生物活性肽的来源、制备、功能及在动物生产中的应用研究等方面对生物活性肽进行综述。     

放牧对鸭茅能量积累及分配的影响

通过长期放牧试验，探讨了不同放牧强度下亚热带高山草地鸭茅种群能量积累规律及能量在不同构件之间的分配特征。在无放牧的对照草地及采食率分别为55％、65％、80％的放牧草地，鸭茅热值随放牧强度的增加而呈单峰曲线型变化，一定强度范围内的放牧干扰提高了鸭茅热值及能量的积累；根部能量的积累随放牧强度的提高而逐渐减少。在禁牧草地，鸭茅种群能量主要被低密度的大分蘖丛所分摊，随着放牧强度的提高，种群能量则逐渐均摊给高密度的小分蘖丛。     

DA-6对野大麦幼苗光合作用和生长的影响

研究了不同浓度的植物生长促进剂--DA-6对野大麦Hordeum brevisubulatum幼苗光合作用和生长的影响.在二叶期喷施较低质量浓度(5 mg/L,10 mg/L)的DA-6,可显著促进幼苗生长和叶绿素含量的提高;四叶期喷施较高质量浓度(20 mg/L,30 mg/L, 40 mg/L)的DA-6,可显著提高野大麦幼苗的生物量,其中20 mg/L和30 mg/L的处理,幼苗生物量分别提高55.1%和59.6%;光合作用能力分别提高12.8%和18.1%.     

哺乳动物卵母细胞发育机理的研究进展

卵母细胞的成熟过程是一个复杂的减数分裂过程，许多分子参与了这个过程的调控，本文就卵母细胞成熟抑制因子（OMI）、成熟促进因子（MPF）、生长分化因子（GDF）、微管辅助蛋白（MAP）、激素、Ca^2 及钙调素等对卵母细胞发育调控机理作一综述。     

新城疫（ND）—减蛋综合征（EDS76）蜂胶二联灭活疫苗的研制Ⅰ．制苗工艺、疫苗安全性和免疫原性试验

将新城疫病毒（NDV）Colon-30株和减蛋综合征病毒（EDS76AV）－127株分别接种于非免疫鸡胚和鸭胚，制备抗原液。抗原液经甲醛灭活后，与纯化的天然免疫增强剂蜂胶乳化，制成鸡新城疫（ND）－减蛋综合征（EDS76）蜂胶二联灭活疫苗，对疫苗的安全性和免疫原性进行了测定。对3－6周龄易感雏鸡以2倍使用剂量肌内注射，安全性良好；对1日龄雏鸡接种1个使用剂量进行急性毒性试验。15d生长曲线表明，对雏难 影响。对6周龄雏鸡注射1个使用剂量，每批疫苗免疫10只鸡，免疫后5－32d，鸡血清中EDS76血凝抑制（HI）抗体的几何平均滴度（GMT）为6．5－11．8log2,ND血凝抑制（HI）抗体的几何平均滴度（GMT）为4．8－9．8log2；对ND免疫攻毒试验表明，3批疫苗，每羽份含有的半数保护量（PD50）分别为≥127、≥131和≥127。     

甘肃茵陈蒿超临界CO2萃取产物化学成分的差异性分析

采用超临界CO2萃取联合气相色谱-质谱法检测了茵陈蒿Artemisia capillaris萃取产物化学成分,并与水蒸气蒸馏法相比较。结果从超临界CO2萃取提取物成分中确定了76种化合物,从水蒸气蒸馏提取物成分中确定了48种化合物。其中长马鞭草烯酮含量分别为37.35%和26.68%,2种方法测得的成分有所差异。与传统水蒸气蒸馏法相比,采用超临界CO2法更能真实、全面地反映茵陈蒿的化学组分,实验为进一步研究利用茵陈蒿植物资源提供了科学依据。