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针对目前市场上出现的原料奶中掺尿素的现状,研究了一种方法可以快速检测掺假乳中的尿素,利用简单的试纸即可检测出乳中尿素。本文研究了试纸的制作工艺,以及试纸的干扰性。结论:原料奶中Ca、Zn和Cu到了一定浓度会影响试纸显色,其余金属影响不大。 相似文献
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为研究日本光叶楮及发酵构树叶在动物饲喂上的特点,将72只小白鼠雌雄各半,均分为6组,分别采用日本光叶楮、野生构树的未发酵树叶粉以及发酵构树叶取代等量基础日粮,进行49 d饲养试验。结果表明:光叶楮组料肉比大部分低于野生品种及对照组。发酵组料肉比大部分高于对照组,且随着浓度增加,料肉比先增加后降低。雌性小白鼠在10%构树叶配比(包括光叶楮树叶、野生构树叶以及发酵构树叶)下,第3周起与对照组的体重无显著差异;而雄性小白鼠在试验期内,未发酵构树叶与30%发酵构树叶饲喂对雄性小白鼠的生长影响较明显,未发酵的构树叶饲喂对雄性小白鼠生长的影响相对于雌性来说更显著。适量比例的发酵构树叶(20%)可以促进睾丸增大。30%及以下构树叶配比的饲料对雌雄小白鼠的肝功能均无明显损伤。构树叶毒性对雄性小白鼠影响更大。 相似文献
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鸡传染性法氏囊病快速诊断试纸的研制 总被引:3,自引:0,他引:3
本文简述用胶体金免疫层析技术,构建鸡传染性法氏囊病快速诊断试纸。试纸主要由测试端、显色区和手柄端3部分构成,能在很短的时间内完成对鸡传染性法氏囊病的诊断,且无需任何仪器设备,具有简便、快速、敏感、特异的特点。 相似文献
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动物医学专业本科毕业论文教学改革的探索 总被引:1,自引:0,他引:1
毕业论文是考察学生综合运用所学知识,独立开展学习、研究和创新实践的重要环节,是对学生综合素质与实践动手能力的全面检验。阐述了毕业论文在动物医学专业本科教学中的重要作用,分析了动物医学专业本科毕业论文教育存在的问题,探讨了提高本科生毕业论文教育的措施,以期为培养高素质的动物医学专业本科毕业学生提供参考。 相似文献
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猪气喘病的控制和净化已成为养猪产业急需解决的难题,本文简述了国外的研究动态,提出控制和净化技术须从种猪、环境、疫苗和药物四个层次依次着手,介绍了常用的药物组合和用药策略,肯定了灭活疫苗的明显效果,报告了活疫苗(168株)在突破母源抗体,占位效应和刺激粘膜免疫和细胞免疫的显著作用,提出我国从龙头企业核心种猪场实施净化猪气喘病的可行思路,并提出具体的建议措施。 相似文献
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探讨复方黄连注射剂对耐药金黄色葡萄球菌的体外抑菌和耐药抑制作用,以便为该中药制剂作为耐药抑制剂开发应用提供一定的研究基础。采用倍比稀释法和药敏纸片法测定复方黄连注射剂对耐药金黄色葡萄球菌的MIC和抑菌圈直径;采用平板挖孔法和药敏纸片法研究复方黄连注射剂对耐药金黄色葡萄球菌的体外耐药抑制作用。结果显示,复方黄连注射剂对耐药金黄色葡萄球菌有较强的抑菌作用。耐药性金黄色葡萄球菌经复方黄连注射剂处理后,对环丙沙星和氧氟沙星的敏感性大大提高。表明复方黄连注射剂对耐药性金黄色葡萄球菌具有体外抑菌和耐药抑制作用。 相似文献
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O Andresen 《Acta veterinaria Scandinavica》1979,20(3):343-350
Fat from boars containing androstenone is absorbed to a piece of filter paper. The filter paper is then placed in a tube and a buffer containing antibodies against androstenone is added. Following incubation the filter paper is removed, and by measurement of the residual binding capacity for androstenone in the buffer a relative value for androstenone content in the fat is obtained.The coefficient of correlation between the results obtained by this rapid method and the ordinary radioimmunoassay was −0.95. 相似文献
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《Journal of Equine Veterinary Science》1998,18(7):468-476
The physiological effect on the equine respiratory tract of recycled phone book paper vs. sawdust bedding was investigated in 12 mares with no clinical signs of respiratory disease. Mares were housed in a 20-stall barn and randomly assigned to one of two treatment groups (Group 1=sawdust; Group 2=phone book paper) for 14 days. After a 14-day turnout, Group 1 was assigned to phone book paper and Group 2 was assigned to sawdust for 14 days using a crossover experimental design. Endoscopic examinations of the upper respiratory tract and trachea along with tracheal washes (TW) were performed on days 0 and 14 of each trial. Cytologic examinations were performed on TW samples. Cell type and laboratory interpretation of TW samples were noted. There was no difference (P>0.05) in cell type between treatment groups within or across trials. Laboratory interpretation indicated no abnormalities in 30 of 48 TW samples. Stall conditions were visually rated and graded daily for drinking water cleanliness, depth of bedding and absorbency, overall cleanliness, ammonia odor, and aerial ammonia levels. The phone book paper bedding was more absorbent (P<0.01), had a cleaner appearance (P<0.01), and had lower aerial ammonia levels (P<0.01) than the sawdust bedding. The phone book paper was effective in controlling aerial ammonia and did not adversely affect the respiratory health of clinically normal horses based on the diagnostic tests performed in this study. Phone book paper did effect the outward appearance of the horses, as horses housed on phone book paper had a dustier outward appearance. In addition, pigment was seen in the TW samples of 12 horses bedded on phone book paper, whereas it was rarely noted in horses bedded on sawdust. Overall, phone book paper appeared to be a viable option for horse bedding when compared to sawdust. 相似文献
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本文综述我国乳制品工业发展现状,对其发展特点及存在问题进行分析,并对2010年我国乳制品新产品开发的特征进行总结。最后,对乳制品工业未来的发展趋势进行展望。 相似文献
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《科技视界》2015,(5)
This paper investigates the role of schema theory in interpreting analytically from four perspectives.The findings indicate that the schema theory which originated from cognitive psychology plays roles of pressure reducer,time saver,ambiguity reducer and development anticipator.The discussion in this paper may be not all-sided and idiographic enough.The author hopes this paper can be useful,though a little for learners in interpreting. 相似文献
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本文通过对内蒙古自治区麻黄属的6个种的形态特征的观察进行分类,并通过对习性,生境及生物碱的含量等特征讨论其经济利用情况。 相似文献