几种鸡源肠道菌对沙门氏菌的体外生物拮抗试验

用从健康鸡消化道分离的鸡源乳酸杆菌４株,双歧杆菌２株,对引起雏鸡腹泻的鸡白痢沙门氏菌和鸡副伤寒沙门氏菌进行体外生物拮抗试验。试验结果显示：３株乳酸杆菌、２株双歧杆菌、１株芽孢杆菌对致病性沙门氏菌均有明显的生物拮抗作用（Ｐ＜０．０１）,而１株乳酸杆菌和１株芽孢杆菌拮抗作用不明显。     

中国东北霜霉菌

 东北过去据三浦(1928)、戴芳瀾(1936)、中田及明日山(1939)、关塚(1939)、內藤(1941,1942)、岩垂(1938,1943)諸氏报告有霜霉菌19种,其中6种笔者尚未見到,今一并录在本文中。本文共包括6屬31种,其中有11个东北新記录种,1个新种。标本保存在沈陽农学院及中国科学院应用真菌学研究所。     

扬州市地产牛乳左旋咪唑残留现状调查报告

为掌握扬州市地产牛乳左旋咪唑残留现状,了解扬州市奶牛饲养过程中左旋咪唑的使用情况,通过检测分析和生产过程调查相结合的方式,对全市地产牛乳左旋咪唑残留状况进行了深入探讨,并在此基础上提出了科学、有效的对策和措施。     

新疆伊犁和塔城地区野果林下土壤特性及系统分类研究

对６个有代表性的剖面进行研究,按《中国土壤系统分类（修订方案）》,它们分属均腐土土纲和雏形土土纲及其相应的亚纲、土类和亚类。     

低蛋白质饲粮添加载锌蒙脱石对肉鸡生长性能、免疫器官发育和肠道组织形态的影响

本试验旨在研究低蛋白质饲粮添加载锌蒙脱石(Zn-MMT)对肉鸡生长性能、免疫器官发育和肠道组织形态的影响.随机选择1日龄健康科宝公雏288只,按体重一致原则随机分成6个组,每组6个重复,每个重复8只鸡.对照组饲喂玉米-豆粕型低蛋白质基础饲粮,正对照组[硫酸锌(ZnSO4)组]饲喂低蛋白质基础饲粮+40 mg/kg Zn...     

Usefulness of cardiac hormones for evaluating valvular disease in cynomolgus monkeys (Macaca fascicularis)

Nonhuman primates are commonly used as experimental animals due to their biological resemblance to humans. In patients with cardiac disease, the levels of atrial natriuretic peptide (ANP) and brain natriuretic peptide (BNP) tend to increase in response to cardiac damage, and they are thus used as indicators for the diagnosis of human heart failure. However, no reference values for ANP and BNP have been reported for heart disease in nonhuman primates. In this study, we recorded the age, sex, and body weight of 202 cynomolgus monkeys, and performed evaluations to assess the ANP and BNP levels, electrocardiography and echocardiography, and accordingly divided the monkeys into two groups: healthy monkeys and those with spontaneous cardiac disease. Statistical analysis was performed to determine the relationship of ANP and BNP with the factors of age, sex, and body weight. No significant relationship was found between the levels of ANP and BNP and the factors of age, sex, and body weight. However, both the ANP and BNP levels were significantly different between the healthy monkeys and monkeys with valvular disease. Similar to humans, the ANP and BNP levels tended to increase with the progression of cardiac disease in monkeys. Based on these results, we concluded that ANP and BNP are indicators of cardiac disease in nonhuman primates, and that this nonhuman primate cardiac disease model is applicable for cardiology research in humans.