检索结果-南通市图书馆

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

GSFCB混凝土梁抗剪性能试验研究

GSFCB混凝土梁抗剪性能试验研究

作者：巴利（Abdul bari Ahmadzai）东南大学

学位级别：硕士

钢筋纤维复合材料(SFCB)近些年可应用于混凝土构件。SFCB屈服前由内部钢筋提供高弹性刚度,屈服后由外部FRP提供屈服后刚度,且SFCB有着优异的抗腐蚀性能。可以通过更改钢筋与FRP的比例来调整SFCB的屈服后刚度。为了在新结构中充分发挥SFC... 详细信息

钢筋纤维复合材料(SFCB)近些年可应用于混凝土构件。SFCB屈服前由内部钢筋提供高弹性刚度,屈服后由外部FRP提供屈服后刚度,且SFCB有着优异的抗腐蚀性能。可以通过更改钢筋与FRP的比例来调整SFCB的屈服后刚度。为了在新结构中充分发挥SFCB的作用,因此需对SFCB构件进行深入研究。本文对宽150mm、高250mm矩形截面的玻璃钢纤维复合材料筋(GSFCB)混凝土梁进行试验研究目的在于考察其受剪承载力。在两点加载装置下对51个梁进行试验,其中27根GSFCB混凝土梁、12根钢筋混凝土梁和12根GFRP混凝土梁。研究的参数包括变量剪切跨度与高度之比(a/d)、箍筋间距s和纵筋配筋率ρ。结果表明,GSFCB混凝土梁的抗剪承载力低于普通钢筋混凝土梁,但略高于GFRP混凝土梁。GSFCB混凝土梁与钢筋混凝土梁相比,裂缝更宽、更深,但与具有相同参数的GFRP混凝土梁相比,其裂缝更小。此外,钢筋混凝土梁的低抗剪承载力可以通过减小箍筋的间距来提高抗剪强度。通过钢筋混凝土梁与FRP混凝土梁的实验数据分别拟合出公式,然后再与规范公式对比,最后发现拟合出的公式与规范公式有一定的比例关系,故而以相同的比例进行计算并提出了SFCB混凝土梁的抗剪建议公式,希望对工程应用与理论分析提供一定的参考。

关键词：抗剪强度玻璃钢纤维复合材料筋试验研究配筋率建议公式

Prevalence of Antibiotic Resistant Bacteria on Tomato Surfaces and Effectiveness of Disinfectants in Reducing the Microbial Load

同方学位论文库评论

在线全文

同方学位论文库

学校读者我要写书评

暂无评论

Journal of Food Science and Engineering 2012年第5期2卷 293-300页

作者： Fauzia Ahmed Rupa Munawar Sultana Yasuhiro Inatsu Md. Latiful bari Md. Anwar Hossain Department of Microbiology University of Dhaka Dhaka 1000 Bangladesh Food Hygiene Research Laboratory National Food Research Institute 2-1-12 KannondaL Tsukuba-shi Ibaraki 305-8642 Japan Food Analysis and Research Laboratory Center for Advanced Research in Sciences University of Dhaka Dhaka 1000Bangladesh

This study was conducted to isolate and identify antibiotic resistant bacteria in fresh tomato sold in three different local markets of Dhaka city. On an average 〉 5.0 log CFU/g of natural microbial populations and coliform bacteria was present in the samples. Prevalence of Salmonella spp., E. coli, Listeria spp., and Yersinia spp., were recorded through cultivation dependent assay of tomato samples of different markets. Almost all of the isolates were uniformly resistant to rifampicin, erythromycin, clindamycin and oxacillin （100%）, vancomycin （93%）, amoxicillin （87%）, whereas 60% of the isolates were found to be resistant to ampicillin and cephalexin. Antibiotic sensitivity test of the presumptive E. coli and Salmonella spp. and corresponding plasmid profiling indicated a correlation of plasmid mediated multidrug resistance （MDR） of these environmental bacteria. Washing with sanitizing agents such as acidified sodium chlorite （ASC） and 200 ppm chlorinated water was able to reduce _〈 2.0 log CFU/g of natural microflora and coliform bacteria. In contrast, ASC was able to reduce 〈 2.0 log CFU/g of other food borne pathogens and, chlorinated water was able to reduce up to undetectable level. Therefore, washing of tomato with 200 ppm chlorinated water could be useful in reducing the pathogen populations on tomatoes.

关键词： Antibiotic resistant bacteria acidified sodium chlorite chlorinated water E. coli O 157:H7 salmonella spp. tomato.

MAR Technique to Reverse the Declining Trend of Groundwater Level in barind Area, NW, Bangladesh

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Water Resource and Protection 2019年第6期11卷 748-757页

作者： Md. Iquebal Hossain Niamul bari Shafi Uddin Miah Chowdhury Sarwar Jahan Md. Ferozur Rahaman Department of Civil Engineering Rajshahi University of Engineering & Technology Rajshahi Bangladesh barind Multipurpose Development Authority Rajshahi Bangladesh Department of Geology and Mining University Rajshahi Rajshahi Bangladesh Institute of Environmental Science University of Rajshahi Rajshahi Bangladesh

The study was carried out in the drought prone water stressed barind area to know the state of rainfall, trend of groundwater level and groundwater management options including Managed Aquifer Recharge (MAR) techniques. Rainfall and groundwater level data have been used and shown a decreasing trend in Godagari and Mohonpur Upazila. But in Niamatpur Upazila rainfall is in reverse condition of rising trend. Decreasing trend of groundwater level (GWL) has been found in the entire study area. The decreasing trend of GWL demands judicious management of groundwater for the area. For recovery of GWL as well as groundwater management, a recharge well as MAR structure has been installed and observed that the situation is better than the before and increasing GWL. More research and study are necessary to know about the trend of groundwater level for the whole barind area and to introduce proper designed and modified MAR techniques to reverse the declining situation of GWL.

关键词： Groundwater Groundwater Level MAR Rainfall Water Management

Effect of aspirin on glucose-D transport in intestine of rat

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

海南医学院学报 2009年第2期15卷 107-110页

作者： Mazhar Mushtaq Farah Deeba Khan M.Naeem Akhtar Saghir Ahmad Jafri Mehboob bari Biochemistry Dept Medical FacultyUniversity of Lahore Institute of Molecular Biology and Biotechnology University of Lahore

Objective: The present study was designed to evaluate the effect a commonly prescribed Non Steroidal Anti Inflammatory Drug(NSAID) *** on brush border membrane in terms of changes in the intestinal transport level of glucose which is monosaccharide with absolute requirement in the body and hence its absorption is directly proportional on the morphology of the intestinal ***: Albino rats(Rattus Norvegicus) were divided into two different groups,Group I(Control),Group II(aspirin-treated,50 mg aspirin/kg of body weight).The treatment was continued for 28 *** the 29th day after overnight fasting,intestine was removed from animals of both *** in transport of glucose-D in intestine were ***: The results indicated a significant decrease in the transport of glucose-D in aspirin treated group as compared to the control ***: Cautious use of NSAID is recommended in commonly observed symptom such as headache and to those patients who are given as a prophylaxis for thrombosis.

关键词：阿司匹林葡萄糖传递过程小肠药物分析

土壤吸附硫化物气体：分析方法及在油气地球化学...

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

物探化探译丛 1991年第4期 34-39页

作者： bari.,CJ 赖志敏

Hydrolysis of Cellulose with Immobilized Cellulases:Process Analysis and Control

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Hydrolysis of Cellulose with Immobilized Cellulases:Process ...

The 19th European Biomass Conference and Exhibition

作者： Verardi,A. De bari,I. Ricca,E. Calabrò,V.

Lignocellulosic materials can be used to produce *** enzymatic hydrolysis of cellulose is catalyzed by cellulases,a complex system of enzymes that work together synergistically to attack native cellulose releasing glucose and soluble ***,these enzymes have low thermal stability and it is quite arduous to recover them from the hydrolyzates for the use in successive *** of cellulases may improve their *** the present paper,an epoxy support（SepabeadsEC-EP403/S） was used as enzymes carrier for the cellulases *** innovative aspect of this work is the use of this particular support to perform a very easy immobilization-stabilization of commercial cellulase *** highest immobilization rate was obtained at alkaline conditions（pH 8） and it was promoted by long-term incubation of enzymes in the mixture containing the epoxy support and *** presence of support reduced the chemical deactivation of the enzymes due to the pH of the immobilization *** overall efficiency of the cellulase immobilization was 70%.

关键词：

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

理论生态学:预测科学的开端

自然杂志 1985年第9期 663-665页

作者： Gina bari Kolata ,黄文几

生态学家以其详尽无遗的野外研究工作而著称,他们在这种工作中对一个地区的生物种类进行描记和鉴别分类,并对这些种类之间的相互作用的型式加以探索,虽然有的生态学者仍然从事这种研究,但有许多生态学家正在以理论模型对各种生态系统进... 详细信息

生态学家以其详尽无遗的野外研究工作而著称,他们在这种工作中对一个地区的生物种类进行描记和鉴别分类,并对这些种类之间的相互作用的型式加以探索,虽然有的生态学者仍然从事这种研究,但有许多生态学家正在以理论模型对各种生态系统进行分析,而且利用描述性研究去确定和发展这种理论模型。生态系统有两种分析方法:一种是用电子计算机模型分析整个生态系统,另一种是用数学模型分析特定的现象,计算机模型是特定环境状况结合环境的独

关键词：陆桥岛屿麦克阿瑟鸟类野生动物戴蒙德生态位小生境灭绝率种数理论生态学群落结构威尔逊

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

不同专项运动员身体成分和骨密度特点分析

不同专项运动员身体成分和骨密度特点分析

作者：亚依德（MD SAYED IBNE bari）北京体育大学

学位级别：硕士

研究目的:本研究通过对游泳、滑雪、橄榄球、足球、拳击、摔跤、体育舞蹈共七项运动的专项运动员进行体脂百分比与骨密度的测量,结合阅读大量文献,了解不同专项运动员体脂百分比和骨密度的现状,了解不同专项运动员的体脂百分比范围;通... 详细信息

研究目的:本研究通过对游泳、滑雪、橄榄球、足球、拳击、摔跤、体育舞蹈共七项运动的专项运动员进行体脂百分比与骨密度的测量,结合阅读大量文献,了解不同专项运动员体脂百分比和骨密度的现状,了解不同专项运动员的体脂百分比范围;通过对本实验骨密度数据的整理,分析不同专项训练对骨密度的影响。研究方法:文献资料法,测试法,统计法。其中测试法选取北京体育大学、竞技体校和国家队的运动员共197名,其中男性运动员59名,女性运动员138名,分别是游泳、滑雪、橄榄球、足球、拳击、摔跤、体育舞蹈七个专项,对这些专项运动员进行DEXA测试得到身体成分和骨密度的数据,经过单因素方差分析,了解不同专项运动员的体脂百分比分布范围和不同专项训练对骨密度的影响。研究结果:所测专项运动员中,男性运动员体脂百分比在15.39%0.33%之间,其中橄榄球最高,为20.33%,摔跤最低,为15.39%。男性运动员骨密度最高的是摔跤运动员,为1.53g/cm,最低的是滑雪运动员,为1.14g/cm。女性运动员体脂百分比在21.78%7.62%之间,其中滑雪最高,为27.62%,摔跤最低,为21.78%。女性运动员骨密度最高的是摔跤运动员,为1.30g/cm,最低的是滑雪运动员,为1.07g/cm。研究结论:1.通过查阅文献,结合生理学知识,与测试数据综合对比分析,找出不同专项男性运动员可能的最适体脂百分比范围:游泳在6%2%之间,滑雪在7%5%之间甚至更低,橄榄球在15%7%之间,摔跤在3%3%之间,体育舞蹈在12.4%0%之间。不同专项女性运动员可能的最适体脂百分比范围:游泳在10%8%之间,滑雪在10.8%5.6%之间,橄榄球在20%0%之间,足球在10%8%,拳击在12%0%之间,摔跤女性运动员在12%5%之间,体育舞蹈在18.6%0.1%之间。2.结合文献和所测结果,发现游泳运动员的骨密度较其他项目低;摔跤运动的骨密度最大;女性游泳、滑雪、运动员骨密度相对较小。

关键词：专项运动员体脂百分比骨密度

Nutritional, Phytochemicals and Antioxidant Properties of Some Popular Pulse Varieties of Bangladesh

同方学位论文库评论

在线全文

同方学位论文库

学校读者我要写书评

暂无评论

Journal of Agricultural Chemistry and Environment 2020年第4期9卷 343-368页

作者： Tanvir Ahmmed Asma Rahman Umme Salma Zakia Akter Md. Mesbah Uddin Ansary Md. Ibrahim Khalil Nurul Karim Latiful bari Laboratory of Preventive and Integrative Biomedicine (PIB) Department of Biochemistry and Molecular Biology Jahangirnagar University Savar Dhaka Bangladesh Food Nutrition & Agricultural Research Unit Center for Advanced Research in Sciences (CARS) University of Dhaka Dhaka Bangladesh Department of Biochemistry and Molecular Biology Gono Bishwabidyalay Savar Dhaka Bangladesh

In this study, we estimate the proximate compositions, phytochemicals (polyphenol, flavonoids, flavonol, tannin, protein, carbohydrate, reducing sugar, and β carotene), antioxidant activities, vitamins, minerals, and heavy metals of the four pulses (mung, anchor, chickpea, lentils) and compare among them to find out more nutritious pulse samples. Mung was found to contain the highest amount of polyphenol (98.02 ± 1.74 mg GAE/100 g) and tannin (447.98 ± 9.96 mg TE/100 g) and anchor (771.35 ± 3.76 mg CE/100 g) was rich in flavonoids as compared to other two pulse samples. Mung was also rich in ash, carbohydrate, vitamin B1, copper and anchor was rich in crude fiber, protein, reducing sugar, and vitamin B2 content. The highest amount of phytochemicals contained in mung and anchor corresponded to its highest antioxidant activity in analyzed antioxidant assays respectively. Other two pulses included in this study were found to contain good source of vitamins, minerals and other nutrients.

关键词： Pulses Phytochemicals Antioxidant Activity Nutrients Bangladesh