一种新型提升器改进设计

针对现有提升器存在的主要问题,分析故障原因,从提升器功能提升、分配器改进设计和油缸结构优化等方面提出新一代提升器改进设计思路。      

激素诱乳技术推广应用及其效益分析

１９８７～１９９３年７年间用＂诱乳激素＂处理空怀奶牛１３０２头次，诱乳成功率达８６．ｌ％，并有８１．６％的牛恢复正常的生理周期，配种后的受胎率达７７．４％，直接经济效益为１５０余万元。本试验表明，对因饲养管理，生殖疾病等原因引起不孕及无乳的成年母牛，用＂诱乳激素＂进行人工诱乳是完全可行的且经济效益是十分显著的。     

松嫩平原羊草草原枯枝落叶分解中化学成分的变化动态

枯枝落叶在分解过程中，其化学成分发生着改变，营养物质不断地向土壤中释放。在羊草草原上，从４月至１０月间，经过１９５天分解后，枯枝落叶的有机化学成分中，可溶性碳水化合物损失最快，其次是粗脂肪和有机碳，木质素的分解最慢。在无机化学成分中，各元素含量的变化，大多数元素之间有明显的相关性，各营养元素损失大小的顺序是：Ｋ＞Ｐ＞Ｎ＞Ｎａ＞Ｃａ＞Ｍｎ＞Ｍｇ＞ＦｅＣｕ＞Ｚｎ。     

Muscular dystrophy in female dogs

The most common form of muscular dystrophy in dogs and humans is caused by mutations in the dystrophin gene. The dystrophin gene is located on the X chromosome, and, therefore, disease-causing mutations in dystrophin occur most often in males. Therefore, females with dystrophin deficiency or other forms of muscular dystrophy may be undiagnosed or misdiagnosed. Immunohistochemistry was used to analyze dystrophin and a number of other muscle proteins associated with muscular dystrophy in humans, including sarcoglycans and laminin alpha2, in muscle biopsy specimens from 5 female dogs with pathologic changes consistent with muscular dystrophy. The female dogs were presented with a variety of clinical signs including generalized weakness, muscle wasting, tremors, exercise intolerance, gait abnormalities, and limb deformity. Serum creatine kinase activity was variably high. One dog had no detectable dystrophin in the muscle; another was mosaic, with some fibers normal and others partly dystrophin-deficient. A 3rd dog had normal dystrophin but no detectable laminin alpha2. Two dogs could not be classified. This study demonstrates the occurrence of dystrophin- and laminin alpha2-associated muscular dystrophy and the difficulty in clinical diagnosis of these disorders in female dogs.     

苹果病害智能诊断方法研究与设计

针对传统苹果专家病害诊断系统自学习能力差、准确率低的不足,研究并设计了人工神经网络的苹果病害诊断方法.采用动态编码对苹果病害模糊知识进行量化,构建BP网络诊断模型进行诊断;采用Java语言开发基于Web的病害动态诊断平台,用白水苹果病害样本进行了实验.该方法对20种苹果病害的诊断具有较好的效果,测试准确率达到85.4%.在获得必要领域知识的前提下,用神经网络进行苹果病害诊断准确率高,系统设计灵活,基于Web的诊断平台便于推广和使用.     

青霉素菌体蛋白营养价值评定及应用效果研究

分析结果表明：青霉素菌体蛋白含粗蛋白质４１．０％,钙１．４４％,总磷１．１１％,代谢能水平为９．９６ＫＪ／ｇ,５种主要的氨基酸含量如下：赖氨酸１．８４％,蛋氨酸０．６０％,胱氨酸０．６２％,苏氨酸１．７８％,色氨酸０．５０％;表观消化率分别为：８８．４％,９０．７％,６１．９％,８０．４％,９１．４％。通过饲养实验说明,在蛋鸡全价料中添加３％、５％、７％的青霉素菌体蛋白,可获得不低于玉米－豆粕日粮的生产成绩     

含硫氨基酸与铜对肉鸡胫骨软骨发育不良的影响

研究日粮过量含硫氨基酸 （ 简称 Ｓ Ａ Ａ , 为推荐量的１５ 倍） 与高铜 （８８６６ ｍｇ／ｋｇ , 为推荐量的１０ 倍） 对肉鸡胫骨软骨发育不良 （ Ｔ Ｄ） 的影响。试验采用半纯合饲粮 （ 含 Ｃｕ ０６６ ｍｇ／ｋｇ） , 试验处理分为正常 Ｓ Ａ Ａ 与 Ｃｕ 组, 高 Ｓ Ａ Ａ 与正常 Ｃｕ 组, 正常 Ｓ Ａ Ａ 与高 Ｃｕ 组和高 Ｓ Ａ Ａ 与高 Ｃｕ 组,试验期２１ ｄ 。结果： 过量 Ｓ Ａ Ａ 降低肉鸡体重、饲料转化率、骨灰、肝 Ｃｕ 、胰 Ｃｕ （ Ｐ ＜ ００１ 或 Ｐ ＜ ００５） , 增加胫骨长度 （ Ｐ ＜ ００５） , 诱发 Ｔ Ｄ发病率升高 （ Ｐ ＜ ００１） , Ｔ Ｄ 指数显著上升 （ Ｐ ＜ ００５） 。高 Ｃｕ 日粮增加肝 Ｃｕ 、肾 Ｃｕ 沉积 （ Ｐ ＜ ００１ 或 Ｐ ＜ ００５） , 提高饲料转化率 （ Ｐ ＜００５） , 但不诱发肉鸡 Ｔ Ｄ 发病率增加。添加高 Ｃｕ 对过量 Ｓ Ａ Ａ 致肉鸡 Ｔ Ｄ 发病率上升无减缓作用, 适宜的 Ｓ Ａ Ａ 和 Ｃｕ 水平是促进肉鸡生长、降低肉鸡 Ｔ Ｄ 发病率的重要限制因素之一。     

禽霍乱免疫母鸡血清抗体和蛋黄抗体消长规律及其相互关系的研究

通过对禽霍乱菌苗免疫产蛋母鸡的血清和蛋黄的抗体定时检测后发现，免疫母鸡的血清抗体和蛋黄抗体的升降趋势基本一致（ｒ＝０．９４），但后者较前者迟后３～６ｄ；血清抗体和蛋黄抗体的滴度分别在加强免疫后的１～３ｄ和３～６ｄ都有不同程度下降，加强免疫前的滴度越高，免疫后的滴度下降幅度越大；蛋黄抗体水平普遍比血清抗体水平低，两者间的差异极显著（Ｐ＜０．０１），这可能是与禽多杀性巴氏杆菌本身的主要抗原成分（ＴＩ抗原）在鸡体内主要产金ＩｇＭ有关。     

西宁地区宰前生猪囊尾蚴病的ELISA诊断

用酶联免疫吸附试验(ELISA),经适当调整程序,对西宁地区宰前生猪788份血样进行猪囊尾蚴病诊断,检出阳性率为5.20％,明显高于市场卫生检疫及几次用血清学方法的调查结果。用DG3022ELISA监测仪判定和眼观颜色判定结果基本一致,符合率达95％。不同来源生猪检出的阳性率有一定差异(1.76％—7.09％)。     

Clinicopathology of gout in growing layers induced by high calcium and high protein diets

1. An experiment was conducted to test the independent and combined effects of high dietary calcium and protein concentrations on the induction of visceral gout in growing birds of a layer strain. 2. One hundred and sixty healthy birds were randomly divided into 4 groups at 35 d of age. The different groups were given 4 diets containing normal or high concentrations of dietary calcium or crude protein in a 2 x 2 factorial experiment for 30 d. The diets contained normal calcium (Ca) and crude protein (CP) (NCNP, 8.5 g Ca/kg and 175g CP/kg), high calcium and normal protein (HC, 36.3 g Ca/kg and 175 g CP/kg), normal calcium and high protein (HP, 8.8 g Ca/kg and 245 g CP/kg) or high calcium and high protein (HCHP, 36.8 g Ca/kg and 242 g CP/kg), respectively. 3. Typical visceral gout was induced by the HCHP diet. The HCHP and HC diet caused severe kidney damage. The HP diet did not cause kidney damage, but significantly increased plasma uric acid and inorganic phosphorus concentrations. 4. The HC diet significantly increased plasma uric acid, calcium and sodium, but significantly decreased plasma inorganic phosphorus, potassium and magnesium concentrations. The HCHP diet significantly increased plasma uric acid, calcium and sodium. 5. Urine volumes were significantly higher on the HCHP and HC diets than on the control. The growers raised on HC and HCHP diets had significantly higher total quantity of 24 h urinary excretion of uric acid, calcium, magnesium, inorganic phosphorus and potassium and a significantly lower 24 h urinary excretion of sodium. The growers fed on the HP diet had a higher 24 h urinary excretion of uric acid and inorganic phosphorus than the control. 6. It is concluded that growing layer birds should not be fed on layer rations.