地方高校图书馆社会化服务的实践与探索——以商洛学院图书馆为例

通过分析高校图书馆社会化服务的可行性、优势及现状,认为地方高校图书馆开展社会化服务不仅必要,而且完全可行。根据我国高校图书馆社会化服务存在的法律政策缺失、思想认识误区、服务数量较少、服务方式被动、服务限制多、效果差等突出问题,并结合地方实际情况有针对性地提出地方高校图书馆开展社会化服务应坚持的策略和具体途径。     

如何促进农业科技期刊网络化发展

在全球化、数字化、网络化的浪潮中,农业科技期刊原有的传播形式已不能满足时代发展和读者多样化的需求,期刊网络化是必然的发展趋势。首先,分析了农业科技期刊网络化的现状,同时研究了农业科技期刊网络化进程中存在的问题,并依此提出了加快组建网络时代新型的农业科技期刊编辑人才队伍,加大农业科技期刊信息量并缩短发布周期,建立农业科技期刊电子商务平台,利用网络发展农业科技期刊等促进措施。     

红叶石楠研究现状及发展前景

总结了国内红叶石楠的引种、组织培养及工厂化育苗成套技术研究、扦插繁殖育苗技术研究、造型艺术研究和在园林应用中的现状及国外红叶石楠研究进展,并分析了其发展前景,为红叶石楠引种及生产研究提供参考。     

农民专业合作社参与沟域经济发展分析

重视农民主体地位是社会生产力发展的必然要求。沟域经济开辟山区经济社会发展的新模式,其发展的根本动力就在于农民作为主体的主观能动性的发挥。然而现有三种沟域经济组织模式中,农民主体地位的实现程度普遍不高。在研究沟域经济农民主体地位缺失现状及原因的基础上,提出依托农民专业合作社参与组织模式来提高农民的主体地位,推动沟域经济发展的理念。农民专业合作社参与模式是组织制度创新的结果,其维护农民的合法权益,提高农民的主体地位,推动沟域经济可持续健康发展,其是未来沟域经济组织模式发展的必然趋势。     

五里湖生态系统健康评价初探

为了了解多个生态工程实施后,五里湖生态系统的健康状况,应用营养状态-综合指数法（TSI-CI）,采用2010年12个月份的监测数据,对探索五里湖生态系统健康状况进行初步评价。首先,选用Chla、SD、TP和TN 4个指标,用相关加权指数法进行营养状态评价,再选择物化和生物指标无量纲化处理后,计算综合指数进行综合评价。结果表明：2010年,五里湖生态系统健康状况在7月份最好,8月份最差;以Chla为代表的综合营养状态指标发生显著增加或降低,并跨越不同的营养分级时,TSI和CI发生显著背离,在其他时间两者关系不明显。     

Impact of sodium cyanide on catalase activity in the freshwater exotic carp, Cyprinus carpio (Linnaeus)

The Cyprinus carpio fingerlings on exposure to lethal (1 mg/L) and sub lethal concentrations (0.066 mg/L) of sodium cyanide showed inhibition in the activity of catalase. The disruption of catalase activity in freshwater fish, C. carpio is demonstrated in the present study using UV–visible spectrophotometer at 240 nm using hydrogen peroxide as a substrate. It suggests toxic effects of sodium cyanide and consequent accumulation of hydrogen peroxide in the functionally different tissues namely, liver, gill, muscle and brain. This might lead to cellular damages, and create widespread physiological disturbance. The results suggest that catalase activity can be a good diagnostic tool for sodium cyanide toxicity in biomonitoring programme.     

珠带鱼和带鱼未定种Trichiurus sp.2的分子系统进化关系

针对南海大型带鱼新种——珠带鱼(Trichiurus margarites Li,1992)与日本产带鱼未定种T.sp.2(sensu Nakabo,2002)之间的系统进化关系及分类地位不明确问题,本研究通过测定采自海南岛西岸珠带鱼的线粒体16S rRNA基因部分序列,结合已报道的T.sp.2及其近缘种的同源序列,对其16S rRNA基因序列变异进行分析。基于Kimura双参数模型计算,海南岛西岸珠带鱼与日本九州、海南岛东岸及印度洋T.sp.2间的净遗传距离(0.000～0.006)远低于属内其他种间的净遗传距离(0.037～0.061),表明二者的遗传分化程度处于种内水平。邻接法(NJ)和最大似然法(ML)构建的分子系统树显示,珠带鱼与T.sp.2以极高的置信度(NJ 100%,ML 96%)聚为一支单系,并与其他带鱼形成姐妹群。根据所得分子数据并结合形态学研究资料,可以确定日本产带鱼未定种即是珠带鱼,它广泛分布于印度西太平洋。综合3种带鱼属鱼类在西北太平洋的种间分化事件,对珠带鱼的起源及演化进行了初步推测。     

村级债务治理：研究现状与一个分析框架

村级债务问题经过十余年的理论争论和实践探索,在义务教育负债化解工作方面取得了较为显著的成就,其他方面乏善可陈。根据课题组实地调研资料表明,村级债务不仅在某些地区快速反弹,且呈现出诸多新特征。结合这些特征及已有研究成果,课题组依据制度经济学相关理论构建了一个村级债务发生、变动的分析框架,并提出了对现行部分制度缺陷的修复,强化债权人对债务人的约束能力,构建＂债务质量监控体系＂等治理措施。     

美国木材与纤维复合材料研究现状

对美国木材工业及纤维复合材料方面的研究及发展现状进行了论述, 重点介绍木材工业、木结构材料、木基复合材料、纤维复合材料、木材化学利用和木材生物质能源等领域的研究现状和发展动态, 并针对我国木材利用现状提出开展木材资源系统基础及应用研究、加快环境友好型天然纤维复合材料研发和加强木材化学及能源利用研究的建议。     

The Study on the Effects of Chinese Herbal Mixtures on Growth, Activity of Post-Ruminal Digestive Enzymes and Serum Antioxidant Status of Beef Cattle

Sixteen Limousin×Luxi crossbred beef cattle [099.4±8.67) kg] were used to evaluate the effects of Chinese herbal mixtures (CHM) on growth, activities of post-ruminal digestive enzymes and serum antioxidant status of beef cattle. Treatments were control (no CHM supplementation) and three formulations of CHM (CHM-A, CHM-B and CHM-C) that were arranged as completely randomized design. The calves were fed in indoor individual feeding barn with total mixed ration for 90 d.The CHM-A, CHM-B, and CHM-C was incorporated into the diet at the level of 20 g kg-1 DM (dry matter) of concentrate.The cattle were weighted at the beginning, at the end and every 15 d between to determine growth rate. Blood sample was taken every 30 d to analyze activities of total superoxide dismutase (T-SOD) and glutathione peroxidase (GSH-PX) and concentration of malondialdehyde (MDA). The cattle were slaughtered at the end of experiment and chymus samples from various section of the post-ruminal digestive tract were collected to analyze enzymes activities. All cattle had similar average daily gain, but cattle supplemented with CHM-A tended faster growth (P=0.08) compared to the control and other CHM treatments. Supplementation of CHM did not affect Ph of chymus in any section of the post-ruminal digestive tract.Activities of pepsin, trypsin, chymotrypsin, and lipase in chymus samples were enhanced (P<0.05) to various extents by supplementation of CHM-A, CHM-B, and CHM-C depending on the enzymes and the site of the digestive tract. Amylase activity was increased only by CHM-A and CHM-C from chymus sample collected at the ileum. Supplementation of CHM-A and CHM-B reduced (P<0.05) concentration of MDA, but did not affect GSH-PX activity in the serum of cattle throughout the entire experimental period. Cattle supplemented with CHM-B also had higher (P<0.05) T-SOD activity in the serum at day 30 and 60 as compared with the control and the other two CHM treatments. Chinese herbal mixtures supplemented at the levels of 20 g kg-1 DM of concentrate increased post-ruminal digestive enzymes activity and enhanced serum antioxidant status. Inclusion of CHM-A and CHM-B in the diet may be favourable for ruminant production.