水泥强度快速检测中预养方案的试验研究

在水泥强度快速检验过程中,预养期是一个重要的阶段。预养期的合理选择是准确预测标准养护条件下水泥28天抗压强度的重要保证。本文根据大量的试验数据进行了水泥快速强度与标准强度相关性的分析研究,提出了一个合理的水泥强度快速检验的预养方案。     

章程限定股东表决权代理人资格效力问题探讨

行使股东表决权的代理人仅限于本公司股东的公司章程条款是否有效？日本神户地方裁判所尼崎支所与直江津海陆运送事件的判决大相径庭。学界绝对有效说欠妥当,部分效力说缺乏逻辑,绝对无效说过于片面。小规模封闭公司的章程应禁止非股东代理权行使,中大型开放公司章程有条件限制股东代理权行使,司法实践中综合考量股东行使表决权的机会,确保股东大会的权能。     

Biological activities of chamomile （Matricaria chamomile） flowers＇ extract against the survival and egg laying of the cattle fever tick （Acari Ixodidae）

In the present work, the potential of acaricidal activity of chamomile flowers＇ extract was studied against engorged Rhipicephalus annulatus tick under laboratory condition. For this purpose, the engorged females ofRhipicephalus annulatus were exposed to two-fold serial dilutions of chamomile flowers＇ extract （0.5%, 1.0%, 2.0%, 4.0% and 8.0%） using ＂dipping method＂ in vitro. The engorged ticks were immersed in different plant dilutions （five ticks for each dilution） for l rain and they were immediately incubated in separate Petri dishes for each replicate at 26℃ and 80% relative humidity. Mortality rate for each treatment was recorded 5 d after incubation. The mortality rate caused by different dilutions of chamomile flowers＇ extract ranged from 6.67% to 26.7%, whereas no mortality was recorded for non-treated control group. The mass of produced eggs varied from 0.23 g （in 8.0% solution） to 0.58 g （in control）, with no statistical differences between the treatments and control （/＇〉0.05）. Also the chamomile flowers＇ extract in highest concentration used （8.0%） caused 46.67% failure in egg laying in engorged females while no failure was observed for non-treated control group. Macroscopic observations indicated that in effective concentrations of plant （4.0% and 8.0%）, patchy hemorrhagic swelling appeared on the skin of treated ticks. The results presented for the first time in this study imply that chamomile may be considered as a promising plant for biocontrol of cattle fever tick disease in the field condition.     

人工智能在教育中的整合应用研究

人工智能技术广泛地应用于教育,可以多媒化、网络化地呈现教学内容;个性化、交互性地实施教学过程;智能化、决策化地选择教学策略;情境化、过程化地实施教学评价.通过教学内容的领域知识模型构建、教学过程的智能代理、教学资源的智能检索、教育评价的智能化测评等实现人工智能和教育的整合运用.     

铅锌冶炼企业含砷废水处理技术的研究进展

文章针对铅锌冶炼企业含砷废水复杂,处理成本高且难以达标排放等问题,综合论述了各种含砷废水处理技术,通过论述及思考,并结合企业的实际生产情况,提出合理建议。     

全运会赛事文化演变、动因与发展研究*

从体育赛事文化的视角,对新中国成立以来全运会赛事文化的演变进行了分析与讨论。按照体育赛事文化的内涵,主要从制度文化、符号文化、举办理念和商业文化四个方面对全运会赛事文化的演变进行了分析与讨论,并对全运会赛事文化的演变动因进行了探索。针对当前全运会赛事文化存在的问题,提出了未来全运会赛事文化发展的几点思考。     

Antidyslipidemic Effect of Ocimum sanctum Leaf Extract in Streptozotocin Induced Diabetic Rats

The antidyslipidemic activity of Ocimum sanctum leaf extract was studied in streptozotocin induced diabetic rats. In this model, there was significant increase in plasma markers of diabetic-dyslipidemia following diminution of lipid metabolizing enzymes. Oral administration of leaf extract (500 mg/kg b.w.p.o.) for 15 days resulted in significant decrease in diabetogenic and dyslipidemia parameters; namely blood glucose, glycosylated hemoglobin, lipid peroxide, free fatty acids, small dense low density lipoprotein, lipid and protein components of plasma lipoproteins, adipose and liver. The regulation of lipids was accompanied by stimulation of postheparin lipolytic activity, reactivation of lecithin cholesterol acyl transferase and hepatic lipoprotein lipase enzymes. The results of the present study demonstrated antidyslipidemic and antioxidant activities in leaf extract of O. sanctum which could be used in prevention of diabetic-dyslipidemia and related complications.     

四步混凝法处理油田回注水的研究

实验采用四步混凝法探讨油田回注水处理剂及其工艺流程。结果表明该水处理工艺简单,水处理剂成本低,流程改动少。处理后水中的悬浮固体、总铁和含油量分别达到2.0mg/L、0.43mg/L和1.4mg/L;硫酸盐还原菌和腐生菌均为102个/mL;浊度降到0.2Ntu;平均腐蚀率降到0.037mm/a;处理后水符合油田回注水水质标准,并且水质稳定。     

现浇钢筋混凝土悬挑结构裂缝原因分析与防治

随着社会经济的发展和人们生活水平的提高,人们对各种建筑物的功能要求和城市建筑美观的要求也越来越高,悬挑结构的应用也越来越多。悬挑结构裂缝在我国建筑工程中是普遍存在的,本文重点阐述了钢筋混凝土现浇悬挑结构裂缝产生的原因及防治措施。     

固体螺杆清洗剂的综合分析

固体螺杆清洗剂是专门用于注塑成型、挤压成型及吹塑成型机螺杆和料筒清洗的产品,是机器转色、换料和维护的绝佳帮手．目前国内几乎没有高效、环保的固体螺杆清洗剂产品,所使用的产品主要依赖进口．本研究采用红外光谱、X射线粉末衍射等现代分析手段,对国外某公司的高效固体螺杆清洗剂进行了综合分析．结果表明：该固体螺杆清洗剂的载体树脂为苯乙烯类树脂、主要助剂为烷基磺酸盐类物质、烷基芳基酯类物质．此结果为国内固体高效螺杆清洗剂的研发提供重要参考,大大缩短产品研发周期．