夏季新型发酵床猪舍与普通猪舍温度比较分析

 在夏季7~8月份高温季节对南京市六合区江苏省农科院试验猪场两种不同类型育肥猪舍室内温度进行了观测分析。数据比较分析表明：夏季新型可移动发酵床育肥舍室内日平均温度波动幅度较大,而普通育肥舍室内日平均温度波动幅度较小;新型可移动发酵床育肥舍在夏季中午高温时舍内日平均温度高于普通育肥舍内日平均温度,而早上和晚上的日平均温度低于普通育肥舍内日平均温度。     

Circadian protein Cry2 is a prognostic factor of colorectal cancer and a predictor of chemotherapy

AIM:To assess the association between the expression of Cry2 and the prognosis of colorectal cancer for determining the role of Cry2 in predicting the outcome of chemotherapy. METHODS:Sixteen primary colorectal cancer patients who consecutively underwent neoadjuvant chemotherapy with 5-fluorouracil were enrolled in the present study. The tumor specimens were obtained by colonscopy prior to treatment. The tumor response was evaluated by the response evaluation criteria in solid tumors(RECIST). Accordingly, the patients were divided into 2 groups:complete response(CR)/partial response(PR) and stable disease(SD)/progress disease(PD). Two-tail ² test was applied to analyze the data. In parallel, we assessed 307 patients, who underwent tumor resection between 2001 and 2005. Survival time was calculated from the date of surgery to the date of death or the last follow-up date. Survival curves were obtained by Kaplan-Meier method. Log-rank test was applied for univariate analysis. The Cox proportional hazards regression model was used to identify the independent prognostic factors. RESULTS:The expression of Cry2 was high in CR/PR patients and was low in SD/PD patients, with significant difference(P<0.05). The average survival time of the 84 patients with high expression of Cry2 was 83.458 months, while the average survival time of 223 patients with low expression of Cry2 was 100.10 months, also with significant difference(P<0.05). The patients with low expression of Cry2 lived longer. The multivariate Cox regression analysis indicated that the expression of Cry2 was an independent prognostic factor for colorectal cancer patients(HR was 1.70, 95% CI was 1.09 to 2.66, P<0.05). Multivariate Cox regression showed that high Cry2 expression predicted a worse prognosis(HR was 2.88, 95%CI was 1.03 to 8.06, P<0.05) in colorectal cancer patients with neoadjuvant chemotherapy. CONCLUSION:Expression of Cry2 is an independent prognostic factor for colorectal cancer patients. Lower expression of Cry2 indicates good response to neoadjuvant chemotherapy.     

西南山地型城市森林生态网络特点分析

阐述山地型城市森林的内涵及生态网络的特点,综述山地型城市森林生态网络的国内外研究进展.山地型城市森林生态网络的系统特征体现了山地型城市森林的自然生态性和生态系统的稳定性,实现山地型城市森林局部主要功能的针对性和整体功能的多样性以及空间格局的优化及同其他景观的和谐统一性.山地型城市森林生态网络构建的主要研究内容包括山地型城市森林生态系统健康和可持续发展、景观生态规划途径以及群落组成与梯度变化.     

拉布拉多犬的毛色遗传和繁殖选育

本文通过对影响犬被毛颜色色度的不同类型的黑色素,以及控制色素沉着的等位基因位点的深入分析探讨,了解和掌握拉犬毛色的表现型和基因型,以及B、b、E和e等位基因的遗传知识,就可以尝试利用谱系和后代的毛色信息确定父母本的毛色基因型,可以对拉犬的毛色进行所希望的繁殖选育,并可以预测后代中所有被毛颜色出现的比例。通过对色素修饰基因的分析探讨,了解和色素拉犬毛色的独特变化。     

修水黄羽乌鸡种蛋孵化效果分析

为了掌握修水黄羽乌鸡的种质特性,本文统计、分析了15批次种蛋的孵化性能,并进行各项指标之间的相关性分析和前、中、后期性能差异显著性分析.结果表明:在正常情况下,修水黄羽乌鸡种蛋的受精率平均为94.43％;平均入孵蛋孵化率为81.15％;平均受精蛋孵化率为85.91％;健雏率为平均97.46％.受精率与孵化率和健雏率、孵化率与健雏率均有较强的正相关.受精率、孵化率和健雏率均是中期最高,对应的受精率差异不显著,孵化率和健雏率差异显著.修水黄羽乌鸡种蛋的受精率和健雏率已达较高水平,孵化率有待提高.     

橡胶树野生种质抗寒前哨苗圃系比区寒害调查报告

2011年4月对广东新华农场抗寒前哨点的120份1981’IRRDB野生橡胶种质寒害调查结果:参试种质中有42份种质寒害级别低于对照,表现出较强的对低温的忍耐力,说明参试野生种质群体中存在大量的耐寒基因,其中大多来至Rodonia地区野生种质,可作为橡胶树抗寒种质选择的优质、高效群体。     

岷江上游干旱河谷4个乡土树种的抗旱生理指标主成分分析

在自然干旱胁迫条件下,对5年生油松、岷江柏、刺槐、榆树4个树种的生理生化指标分别在旱季和雨季进行测定,分析讨论了干旱胁迫下,各树种生理生化指标的变化规律及其相关关系。根据4个树种在干旱胁迫条件下各指标的表现,利用主成分分析法对4个树种的抗旱性进行综合评价。抗旱性综合评价结果表明:4个树种的抗旱能力以刺槐的抗旱性最强,油松的抗旱性最差。其排名顺序为:榆树>刺槐>油松>岷江柏。     

饲粮中添加乳铁蛋白对早期断奶仔猪生长性能、肠道菌群及肠黏膜形态的影响

本试验旨在研究在饲粮中添加乳铁蛋白(lactoferrin,LF)对断奶仔猪生长性能、肠道菌群及肠黏膜形态的影响。试验选用96头体重相近的21日龄"杜×长×大"三元杂交断奶仔猪,随机分为4组,分别饲喂基础饲粮(对照组)、基础饲粮+250 mg/kg乳铁蛋白、基础饲粮+500 mg/kg乳铁蛋白和基础饲粮+750 mg/kg乳铁蛋白,每组4个重复,每个重复6头仔猪。正试期21 d。结果表明,与对照组和750 mg/kg乳铁蛋白组相比,饲粮中添加250和500 mg/kg乳铁蛋白可显著提高仔猪平均日增重(P<0.05);与对照组相比,不同水平乳铁蛋白可显著降低盲肠中大肠杆菌数量(P<0.05),其中添加500 mg/kg乳铁蛋白显著提高了盲肠、结肠中乳酸杆菌的数量(P<0.05),显著降低了结肠中大肠杆菌数量(P<0.05);添加250和500 mg/kg乳铁蛋白极显著提高了十二指肠、空肠、回肠的绒毛高度/隐窝深度比值(P<0.01)。结果提示,饲粮中添加乳铁蛋白可刺激肠道有益菌生长、降低有害菌增殖,从而改善肠道功能,具有提高仔猪生长性能的作用,本试验条件下乳铁蛋白的适宜添加量为250 mg/kg。     

盐酸沃尼妙林预混剂的研制及其对猪增生性肠的炎疗效观察

以盐酸沃尼妙林为原料,利用流化床制粒包衣技术成功制备微丸型盐酸沃尼妙林预混剂,用HPLC测定制剂中主药含量。结果表明,制得的产品粒度均匀、流动性良好、含量稳定。选用猪增生性肠炎的自然发病猪为试验对象,以延胡索酸泰妙菌素疗效为对照。结果显示,试验组的高中低不同剂量组(中剂量为推荐剂量)与对照组对猪增生性肠炎治愈率分别为91.0%、82.0%、66.7%和75.3%,有效率分别为96.7%、88.7%、76.7%和83.6%,相同推荐剂量的微丸型盐酸沃尼妙林预混剂组的治愈率和有效率均高于泰妙菌素预混剂组(P<0.05)。