中草药添加剂对断奶仔猪抗氧化功能指标的影响

[目的]探讨中草药饲料添加荆对断奶仔猪抗氧化功能的影响,为中草药添加剂的利用及推广提供参考依据.[方法]选用48头体重相近的断奶仔猪,随机分为试验Ⅰ组(对照组)、试验Ⅱ组、试验Ⅲ组和试验Ⅳ组4个组.在饲喂中草药添加剂后第7、第14和第21天分别采取血液进行抗氧化功能指标的测定.[结果]试验IV组的血清超氧化物歧化酶(SOD)活性和谷胱甘肽酶(GSH-Px)活性在整个试验期间高于其他试验组,尤其在第7天时的差异显著或极显著(P<0.05或P<0.01).且GSH-Px活性随日龄的增加呈先降后升的变化;丙二醛(MDA)含量,在第7和第14天时,试验Ⅳ组低于其他组,差异极显著(P<0.01),在第21天时各组间无显著差异;试验Ⅳ组的一氧化氮(NO)含量显著低于其他组(P<0.05),并随着日龄增加,各组的NO含量均呈下降趋势.[结论]中草药添加剂能提高断奶仔猪抗氧化功能.     

双低菜籽粕在断奶仔猪日粮中的适宜添加量研究

[目的] 探讨断奶仔猪日粮中双低菜籽粕的适宜添加量.[方法]选取长白(♂)与八眉猪(♀)杂交一代母猪与长白(♂)杂交所产三元杂交仔猪48头,随机分为4组,12头/组,预饲期5 d,然后进行28 d饲喂试验.第1、第2和第3组饲粮中双低菜籽粕的添加量分别为5%,7%和9%,第4组为对照组,不添加双低菜籽粕,平衡日粮中的消化能.[结果] Ⅱ 组断奶仔猪平均日增重最高;第7天与Ⅲ组,第14天和第21天与Ⅲ、Ⅳ组,第28天与其他3组均差异显著(P<0.05).[结论]双低菜籽粕含量为7%时增重效果最好.     

南极适冷菌Rheinheimera sp.97产抗菌活性物质发酵条件的优化

[目的]优化南极适冷菌Rheinheimera sp.97产抗菌活性物质的发酵条件.[方法]通过单因素和正交试验对南极适冷菌R.sp.97产抗菌活性物质的发酵培养基进行了优化,并通过单因素试验对其发酵条件进行了优化.[结果]菌株R.sp.97产抗菌活性物质的最佳培养基为:蛋白胨3.0g/L,硫酸1.0g/L,淀粉2.0g/L,NaCl 15.0g/L;最佳发酵条件为:发酵培养基初始pH8,发酵温度10℃,摇瓶装液量30.0%(V/V),接种量1.0%(V/V).优化后菌株R.sp.97发酵液的抗菌活性较优化前提高了22.2%.[结论]为研究南极适冷菌R.sp.97的活性物质奠定了基础.     

二甲苯对小鼠造血功能的影响

[目的]研究二甲苯及致溶药物盐酸苯肼对小鼠遣血功能的影响,为人们日常生活防护和临床诊治提供一定的理论和试验支持.[方法]受试动物昆明小鼠30只,随机分为5组,设置低、中、高浓度二甲苯及盐酸苯肼受试组,以及一个空白对照组.试验期间连续用药进行腹腔注射,第2天起每日检测红细胞数量、白细胞数量、血红蛋白含量以及网织红细胞比例.[结果]血液检测显示用药2 d后小鼠开始出现贫血现象,第5天红细胞数量最高可降低56%左右,血红蛋白含量也随之下降65%左右,网织红细胞比例最高可升高21%左右,当持续用药时,各指标大体维持在同一水平上.[结论]二甲苯对小鼠有致溶血作用,可严重影响小鼠的造血功能.     

醋蛋保健口服液的研制

[目的]改善醋蛋液口味.[方法]以醋蛋、蜂蜜为主要原料.加入中草药提取液,研制具有保健功能的醋蛋保健口服液,并对稳定剂和矫味剂的选择、口服液的配方等进行探讨.[结果]β-环糊精为最佳稳定剂,添加量为0.1%.阿斯巴甜为最佳矫味剂,添加量为0.3g/ml.通过正交试验和感官评定,确定了该保健口服液的最佳配方为:醋蛋酶解液25%、蜂蜜10%、中草药提取液1%、阿斯巴甜0.3g/ml.[结论]该产品改善了醋蛋风味,营养丰富且具有保健养生功效.     

低聚木糖对蛋用雏鸡免疫功能及肠道菌群的影响

[目的]探讨低聚木糖时蛋用雏鸡免疫功能和肠道菌群的影响,以找出较为合理的雏鸡添加量.[方法]以1日龄海兰褐壳蛋用雏鸡为试验对象,在基础日粮中分别添加0.010%、0.015%、0.020%低聚木糖,测定其免疫功能和肠道菌群.[结果]日粮中添加低聚木糖能够提高雏鸡免疫功能,增加雏鸡盲肠内双歧杆菌数量,降低大肠杆菌和沙门氏菌数量.[结论]日粮中添加0.020%低聚木糖的效果最好.     

蛭弧菌在大菱鲆养成中的应用研究

[目的]用蛭孤菌促进大菱鲆的生长,提高存活率,消除养殖水体中的弧菌.[方法]采用20 d的换水周期,以不添加蛭弧菌的养殖池为对照组(B组),往水体中添加蛭弧菌的养殖池为蛭弧菌添加组(C组),以生产性的养殖池作为参照(A组),以成活率、增重率、体重平均日增长量、体长增长率、体长平均日增长量、肥满度为判断依据,确定蛭弧菌对大菱鲆生长的影响;对换水前后各组养殖水体中所含弧菌数进行检测.[结果]蛭弧菌添加组大菱鲆的生长指标和存活率显著高于生产组和对照组(P<0.05);与生产组相比,蛭弧菌添加组大菱鲆的成活率提高了13.23%,增重率、体重平均日增长量、体长增长率、体长平均日增长量、肥满度分别提高了663%、130.35mg、28.09%、31.82 μm、4.99.蛭弧菌添加组的弧菌数明显减少.[结论]蛭弧菌能够提高大菱鲆的成活率,促进其生长发育,并能有效控制养殖水体中弧菌数.     

欧李果酒主发酵工艺条件的研究

[目的]探讨酿造欧李果酒的主发酵工艺条件.[方法]以欧李果汁为主要原料,以活性干酵母为菌种,通过单因子试验和正交试验对欧李果酒的主发酵工艺进行研究.[结果]主发酵最佳工艺条件为活性千酵母添加量0.1%,SO<,2>添加量50～60 mg/L,发酵温度23℃.[结论]在最佳条件下发酵产生的果酒酒度最高,口味纯正柔和、果香浓郁、色泽鲜亮、营养丰富,具有典型的果香和酒香.该工艺值得重点推广.     

低聚木糖对雏鸡生长性能·免疫功能及营养物质利用率的影响

[目的]探讨低聚木糖对雏鸡生长性能、免疫功能及营养物质利用率的影响,以确定较为合理的雏鸡添加量.[方法]以1日龄海兰褐蛋用雏鸡为试验对象,喂养添加不同水平(0.01%、0.02%和0.03%)的低聚木糖后测定其生长性能、免疫功能及营养物质利用率等各项指标.[结果]日粮中添加低聚木糖能够提高雏鸡的生长性能、免疫机能和营养物质利用率.[结论]日粮中添加0.02%低聚木糖的促进生长效最好.     

吡虫啉在稻田水环境中的残留动态

[目的]研究了稻田水环境中吡虫啉的残留动态.[方法]田水样品采用二氯甲烷萃取,HPLC-UV测定不同田水样品中的吡虫啉残留量.[结果]田水中吡虫啉的平均添加回收率为89.69%～92.06%、标准偏差为3.01%～3.73%、变异系数为3.79%～4.46%,吡虫啉的最小检出量为1.0×10<'-9>g,在田水中最低检测浓度为0.005 mg/L.在安徽的试验结果表明,吡虫啉在碍水中降解半衰期为4.4 d.[结论]10%吡虫啉乳油在稻田使用后,在田水中降解较快.     

转炉炉壳热应力分析

根据实际转炉建立实体模型。以有限元为手段,考虑了炉衬和炉壳材料的物性参数随温度变化的特点和炉衬与炉壳之间膨胀间隙,计算了转炉炉壳在温度载荷和炉衬膨胀压力同时作用下的热应力。所得结果可为转炉炉壳设计提供依据。     

焦炭热性能指标意义浅析

通过对焦炭在高炉内的历程及其变化规律的剖析,阐述焦炭热性能指标的意义,形象地把焦炭在高炉内的损耗分为三部分(M1,M2,M3)。指出M2对焦比及焦炭价格有一定的指导作用。     

Results of treatment of cancer of the cardia

Cancer of the cardia is traditionally discussed with cardiac cancer of the lower portion of the esophagus and upper gastric cancer invading the esophagus, and the specific characteristics of cancer of the cardia have never been clearly defined. We reviewed the outcome of 172 patients with adenocarcinoma of the cardia who had undergone radical surgery between 1949 and 1994 in the Division of Gastrointestinal Surgery of the Cancer Institute Hospital. The centers of the tumors were located within 2 cm above and below the boundary between the esophagus and the stomach, and their longitudinal diameter was less than 8 cm. We divided the patients into an early period (1949-1979; n = 79) and a late period (1980-1994; n = 93), and focused on the historical transition. There were no differences in patient gender or histology between the two periods. However, the late period was associated with fewer cases of esophageal invasion and shorter longitudinal diameter, as the age of the population advanced. The number of advanced cancers such as the localized and infiltrative type had decreased, and early cancer and early clinical stage had become more common, but despite the fact that the number of early cancers had increased, extended dissection, such as thoracic and paraaortic lymph node dissection, was performed more frequently. By clinical stage, the long-term outcome markedly improved in Stage I patient in the late period, and tended to improve in Stage II and III patients. This appears to have been attributable to the prevention of micrometastasis by extended dissection, although the number of early cancers is another major potential cause. There were no differences in the outcome of Stage IV patients between the two periods, and further advances in multimodality therapy must be awaited. The range of resection is basically proximal gastrectomy, and if there are adequate indications, the prognosis is favorable. In view of the status of lymphatic flow and lymph node metastasis, and long-term results, lateroaortic lymph node dissection is important. Since the number of early cancer patients has been increasing, if intraabdominal recurrence is prevented, intrathoracic lymph node dissection will contribute greatly to the outcome of such patients.     

The effect of amount of possession of the trait of hostility on accuracy of perception of hostility in others.

Some theories of personality hold that an individual's perception of others is influenced by his own personality characteristics; more specifically, that a trait of low social value will be projected more into others, and that insight into the possession of these characteristics reduces this distortion. These 2 hypotheses were tested by having a group of college students rate each other (including themselves) on degree of friendliness or hostility. Agreement with group rating about self yielded the insight score. In general, the hypotheses were supported; the "friendly" Ss were most accurate in their perception of others, and insight was positively associated with accurate perception. From Psyc Abstracts 36:04:4HL16M. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Comparison of rates of infection of two methods of emergency ventricular drainage

The rates of infection of two methods of external ventricular drainage in use at Atkinson Morley's Hospital--namely, (a) percutaneous drainage with Rickham reservoirs and (b) tunnelled ventriculostomies--were compared in this retrospective review. Percutaneous drainage of CSF with Rickham reservoirs was associated with a 27% rate of infection as identified by positive microbiological cultures; tunnelled ventriculostomy catheters had a 10% infection rate. The difference in the infection rate between the two methods was statistically significant (P < 0.015). Other variables examined, including the age and sex of the patients and the reasons for ventricular drainage, were not associated with an increased rate of infection. Most infections from either method were caused by a coagulase negative staphylococcus. The average duration of ventricular drainage before identification of positive cultures was 5.7 days for Rickham reservoirs and 6.0 days for ventriculostomies.     

浅析《野草》的版画特征

鲁迅先生一生热爱美术作品,对版画中木刻兴趣尤甚.<野草>作为其"写心之作",亦呈现出一些与木刻版画一致的审美特征:一是具有木刻版画的色彩特征,多对比、多冷色,有阴郁的美感;二是具有木刻版画的力度特征,环境描写、人物刻画处处刀锋毕现,遒劲有力,有一种"力之美".     

四辊破碎机车刀架的改造

针对四辊破碎机车刀架车削中存在的几个问题,详细介绍了电动车刀架的结构和工作原理,建立主要设计参数的数学表达式,并进行适当的分析。改造后,这种电动车刀架运行平稳、可靠、方便、省力,取得了预期的效果。     

Effect of antibiotics of chemotaxis of human leukocytes

The effect of 20 different antibiotics on chemotaxis by human neutrophils was studied. Human leukocytes incubated with chloramphenicol, rifampin, sodium fusidate, and tetracyclines in vitro showed markedly depressed migration. The mechanisms by which these antibiotics affect leukotaxis are discussed.