几种方法对奶牛乳房炎的治疗效果观察

乳房炎是奶牛最常见的疾病之一,严重制约着奶牛业的发展。乳房炎可降低奶产量;使奶中的营养成分减少;影响食品卫生;浪费饲料,加重经济损失。本试验选用青、链霉素为基础药,同时分别选用乳肿康,普朗头孢,奶牛三热灵,抗病毒1号等中草药复方制剂采用乳房灌注的方式治疗奶牛乳房炎,每天给药1次,21d为一个疗程。结果表明,中草药复方制剂的治疗效果由于基础治疗组,而且能够明显提高奶产量,本研究为奶牛乳房炎的临床治疗提供资料。     

土壤斥水性影响因素及改良措施的研究进展

论述了森林火灾、土壤含水率、有机质含量、pH值、生物膜和粘土矿物质等因素对土壤斥水性的影响以及国内外土壤斥水性改良措施的研究进展，并提出当前土壤斥水性研究的重点和今后的研究方向是土壤毛孔或粒子范围方面的研究、土壤含水率和斥水性的表达、大范围田间斥水性对不同水文学要素的定量影响，同时指出国内土壤斥水性的研究发展方向。     

喷雾荧光示踪剂回收率影响因素实验

荧光剂作为喷雾实验常用的示踪剂，其回收率对实验结果的准确性至关重要。设计了荧光示踪剂回收率影响因素的实验方案，用若丹明WT和荧光素钠作为荧光示踪剂，分别在不同稀释液和洗取液、气象条件、遮盖率、采样时间和沉积载体上测试荧光示踪剂回收率的变化情况。结果表明，在单因素试验中，其他条件相同的情况下，若丹明WT在典型阴天的回收率较高；荧光示踪剂回收率随遮盖率增加而增加，随采样时间增加而降低；滤纸更适宜作为沉积载体。     

紫花苜蓿干燥和茎叶分离效果预测模型与工艺优化

为研究新鲜切碎紫花苜蓿茎叶干燥分离过程中，入口温度、入口风速、转筒转速和喂料速度对出机叶料含水率、出机茎料含水率、茎叶分离率的影响，采用9GFQA-600型苜蓿干燥茎叶分离设备进行试验，设计了四因素二次正交旋转组合试验进行回归分析，建立了相应的数学模型并进行了优化。结果表明，得到的回归方程显著，具有较好的拟合度；4个因素对苜蓿茎叶干燥分离效果的影响大小依次为：入口温度、入口风速、转筒转速、喂料速度；最优参数组合为：入口温度400℃、入口风速14m/s、转筒转速为12r/min、喂料速度8kg/min，在此条件下出机叶料含水率为13.42%、出机茎料含水率为14.24%、茎叶分离率为     

Maximum tree method based aspect mining method

By means of discovering crosscutting concerns from legacy systems, aspect mining intends to help migrate the systems to an aspect oriented design. An improved method based on maximum tree method for aspect mining is presented. The method uses aspect ideas to capture the runtime method call information by mining crosscutting concerns from dynamic behaviors, and then constructs a method call relationship data matrix. Based on fuzzy similarity relation theory, by introducing the similarity, an object similarity matrix is constructed, and the maximum tree method is used to identify the crosscutting concerns in the system. The method can provide a basis for system’s software reconstruction and reusability. An experiment is conducted to verify the validity of the method. Compared with the existing typical mining methods, the method shows the virtue of clear implementation and high efficiency.     

鹅源致病性大肠杆菌O86K61 和O44K74亚型的分离与鉴定

从湛江养鹅场发生的疑似大肠杆菌病病死鹅无菌采集病料,分离鉴定出8株大肠杆菌,其中,O86K61 4株,O44K74 3株,1株未定型,上述菌株均不产生内毒素;药敏试验结果表明,大部分菌株对阿米卡星高度敏感,对恩诺沙星、先锋霉素、磺胺嘧啶、诺氟沙星、强力霉素呈交叉耐药;对万古霉素、新霉素、呋喃唑酮中度敏感;对阿莫西林、链霉素、卡那霉素、庆大霉素、四环素不敏感。上述结果提示,同一发病鹅场存在着多种致病性大肠杆菌的血清型,并存在多重耐药。     

黄芪多糖对奶牛乳房炎主要致病菌的体外抑菌作用

采用水提醇治法提取黄芪多糖,并应用琼脂扩散法研究了黄芪多糖对几种奶牛乳房炎主要致病菌的抑制效果。结果表明,10 mg/mL的黄芪多糖对3种细菌都有一定的抑制效果,其中对大肠埃希菌的抑制作用最强,抑菌圈达11.05 mm±0.31 mm,对链球菌和金黄色葡萄球菌的抑菌圈分别为8.50 mm±0.71 mm和9.32 mm±0.21 mm。3种细菌的最小抑菌浓度不同,对大肠埃希菌的最小抑菌浓度为6.6 mg/mL,而对金黄色葡萄球菌和链球菌则为10.0 mg/mL。     

Characteristics of phosphorus removal in an intermittent aeratedbiofilter under two operating regimes

A fixed film system composed of an anaerobic biofilter and an intermittently aerated biofilter (IABF) was developed for enhanced biological phosphorus removal (EBPR) in the treatment of domestic wastewater. We investigated the influence of the operating regime on the performance of EBPR in IABF. Compared to the sequencing batch regime, net phosphorus uptake capacity in IABF was improved under the aerobic continuous feeding (ACF) regime. An innovative method that can be used instead of traditional backwashing was applied to IABF for removal of phosphorus from the reactor under the ACF regime. Using this method, a stable performance of EBPR was achieved during long term operation, with a low frequency of backwashing in IABF. Distribution and variation of organic and phosphorus in IABF may imply spatial distribution of microorganisms in the column of the reactor under the ACF regime.      

A cusp catastrophe model study of destabilization of soft sandwich rock slope

A slope geomechanical model was proposed based on the destabilization characteristics of soft sandwich rock slopes. Based on an analysis of the effects of internal external factors on slope stability, the cusp catastrophe model of slopes can be employed to analyze and predict the necessary conditions leading to slope catastrophes. During the processing of the mass and energy exchange with the external, this may lead to the change of controlling variables. Slides or quick or slow creeping thus may take place due to environmental complexity. This work helps deepen understanding of the formation of landslides and makes feasible the applcation of the catastrophe model to slope destabilization investigations.     

手术治疗犬肠套叠

肠套叠是指一段肠管及其附着的肠系膜套入邻近一段肠腔所导致的绞窄性肠变位.肠套叠多发生于2～4月龄的幼犬.本病发展迅速,如治疗不及时犬死亡率很高.