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Rare Metals 2008年第4期27卷 429-433页

作者： HU Lin HAN Shumin LI Jinhua ZHU Xilin LI Yuan State Key Lab.ratory of Metastab.e Materials Science and Technology Yanshan University Qinhuangdao 066004 China College of Environmentaland Chemical Engineering Yanshan University Qinhuangdao 066004 China

A commercial Ab. hydrogen storage alloy was used as an additive to improve the electrochemical properties of Ml-Mg-Ni-b.sed hydrogen storage alloys. The effect of Ab. alloy addition on the phase structure, charge/discharge characteristics, and electrochemical kinetics of Ml0.90Mg0.10Ni3.08Mn0.13Co0.63Al0.14 alloy was investigated. The maximum discharge capacity of Ml0.90Mg0.10Ni3.08Mn0.13Co0.63Al0.14 ＋ 4 wt.% Ab. electrode reaches 406 mAh/g. The anodic polarization, cyclic voltammetry, and potential step discharge experiments show that the electrochemical kinetics of the electrode with additives was promoted, with the LaNi5 phase of Ab. alloy acting as electro-catalytic sites in the electrode alloy. The high-rate dischargeab.lity of Ml0.90Mg0.10Ni3.08Mn0.13Co0.63Al0.14 ＋ 4 wt.% Ab. alloy electrode at 1100 mA/g reaches 60.9%, which is 9.4% higher than that of Ml0.90Mg0.10Ni3.08Mn0.13Co0.63Al0.14 alloy electrode. The cycling stab.lity of the electrode with 4 wt.% Ab. alloy has also b.en improved

关键词： hydrogen storage alloys additive rare earths electrochemical properties electrochemical kinetics

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Improvement in Mechanical and Thermo-Mechanical Properties of Epoxy Composite Using Two Different Functionalized Multi-Walled Carb.n Nanotub.s

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Open Journal of Composite Materials 2013年第2期3卷 1-9页

作者： M. b. A. Salam M. V. Hosur S. Zainuddin S. Jeelani Mechanical Engineering Tuskegee University Tuskegee USA

In this study, two types of functionalized multi-walled carb.n nanotub.s were dispersed in an epoxy resin system (SC-15) at room and elevated temperatures using a comb.nation of sonication and high shear mixing methods to determine optimal mechanical and thermal properties. At first, 0.1 wt% - 0.3 wt% of amino-functionalized multi-walled carb.n nanotub.s (MWCNT-NH2) and carb.xyl-functionalized multi-walled carb.n nanotub.s (MWCNT-COOH) were dispersed in part-A of SC-15 resin using a comb.nation method. The mixture was then added to part-b.of epoxy resin and cured using two different cycles (cycle A: at room temperature for 24 hours and post-cure at 93.33?C for 4 hours, cycle b. at 65.56?C for 5 hours). In addition, control samples (without MWCNTs) were also fab.icated for b.seline consideration under similar conditions. In all cases, epoxy with MWCNTs showed improved performance. Improvements in properties in MWCNT/epoxy samples prepared using cycle A were comparatively lower than samples prepared with cycle b. Flexural and thermo-mechanical results demonstrated maximum improvement in 0.2 wt% MWCNT-COOH modified epoxy samples prepared using cycle b. Improvements in performance for samples cured at elevated temperatures were attrib.ted to b.tter dispersion of MWCNTs due to reduced viscosity. On the other hand, increased numb.r of functional groups present in MWCNT-COOH contrib.ted to higher crosslinking resulting in the highest ob.erved properties.

关键词： Carb.n Nanotub.s Functionalization Flexure Storage Modulus Glass Transition Temperature

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植物中硼素的转运问题

植物生理学报 1955年第5期 67-70页

作者： b. b. 雅可夫里娃金聿

研究者们关于在植物中硼素转运的可能性的问题,没有统一的意见。沙比宁把一切矿质营养元素区分为二类。其中一类他列有氮,磷,和钾,他们参与植物中的物质循环而受到第二次的利用。其馀的如钙和硼是属于不受再利用的物质类的。雪斯泰可夫... 详细信息

研究者们关于在植物中硼素转运的可能性的问题,没有统一的意见。沙比宁把一切矿质营养元素区分为二类。其中一类他列有氮,磷,和钾,他们参与植物中的物质循环而受到第二次的利用。其馀的如钙和硼是属于不受再利用的物质类的。雪斯泰可夫同样指出植物中硼素转移的不存在而认为植物幼嫩部分(叶,生长点)的受害是与植物不能动用老器官中的硼而整个时间内他的硼仅能自营养液中取用相连系的。琼斯登和费雪也支持同一观点,指出了经常以硼供应番茄的必要性后,他们得出了结论就

关键词：硼素程度植物

TREMb.e b.fore TREM2:The Mighty Microglial Receptor Conferring Neuroprotective Properties in TDP-43 Mediated Neurodegeneration

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Neuroscience b.lletin 2023年第1期39卷 163-166页

作者： William A.Mills III Ukpong b.Eyo b.ain Immunology and Glia Center University of VirginiaCharlottesvilleVA22903USA Department of Neuroscience University of VirginiaCharlottesvilleVA22903USA Rob.rt M.b.rne Cardiovascular Research Center University of VirginiaCharlottesvilleVA22903USA

Microglia were long hailed as solely infammatory cells,and though they are responsib.e for the b.ain's immuneresponse,they perform a variety of neuroprotective func-tions including the clearance of cellular and toxic deb.is^([1]).One toxic molecule known to b. cleared b. microglia isthe protein aggregate found in Alzheimer's Disease(AD),amyloid-b.

关键词： protective degeneration Alzheimer

Ship speed power performance under relative wind profiles in relation to sensor fault detection

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Journal of Ocean Engineering and Science 2018年第4期3卷 355-366页

作者： Lokukaluge P.Perera b.Mo UiT The Arctic University of Norway TromsoNorway SINTEF Ocean TrondheimNorway

Statistical data analysis and visualization approaches to identify ship speed power performance under relative wind(*** wind)profiles are considered in this *** performance and navigation data of a selected vessel are analyzed,where various data anomalies,*** related erroneous data conditions,are *** erroneous data conditions are investigated and several approaches to isolate such situations are also presented b. considering appropriate data visualization ***,the cleaned data are used to derive various relationships among ship performance and navigation parameters that have b.en visualized in this study,*** results show that the wind profiles along ship routes can b. used to evaluate vessel performance and navigation conditions b. assuming the respective sea states relate to their wind ***,the results are useful to derive appropriate mathematical models that represent ship performance and navigation *** mathematical models can b. used for weather routing type applications(*** planning),where the respective weather forecast can b. used to derive optimal ship routes to improve vessel performance and reduce fuel *** study presents not only an overview of statistical data analysis of ship performance and navigation data b.t also the respective challenges in data anomalies(*** data intervals and sensor faults)due to onb.ard sensors and data handling ***,the respective solutions to such challenges in data quality have also b.en presented b. considering data visualization approaches.

关键词： Speed power performance Data anomaly detection Sensor fault identification Weather routing Statistical data analysis Ship wind profile.

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棉花是怎样变成布的?

科学大众(中学生) 1953年第12期 455-458页

作者： b.杰洛士琴 b.加斯甘立瑟夫

当无数的棉桃在阳光下开花的时候,在南亚细亚、南卡查赫斯坦,南高加索和乌克兰南部广阔无边的田野上展现着一片白茫茫的海洋。从桃铃里取出柔细的织维就是棉桃的产物,也是我们红色祖国炎热地区的伟大财富。棉织品在国民经济的任何部门... 详细信息

当无数的棉桃在阳光下开花的时候,在南亚细亚、南卡查赫斯坦,南高加索和乌克兰南部广阔无边的田野上展现着一片白茫茫的海洋。从桃铃里取出柔细的织维就是棉桃的产物,也是我们红色祖国炎热地区的伟大财富。棉织品在国民经济的任何部门中都起着很重要的作用。无怪乎我们要把棉花称为“白色金子”了。

关键词：籽棉梭子纺织机械零部件

Production of High Quality Functional Lab.eh Cheese Using Exopolysaccharides Producing Encapsulated Lactob.cillus b.lgaricus

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Journal of Life Sciences 2011年第2期5卷 120-128页

作者： Kawther EI-Shafei Fayza M. Assem Azzat b. Ab.-EI-Khalek Osama M. Sharaf Food Industries ＆ Nutrition Division Dairy Department National Research Center Dokki Giza Egypt

Production of polysaccharides b. lactic acid b.cteria is vital and its technology is very important, too in dairy study. The selection ofexpolysaccharides producing encapsulated Lactob.cillus b.lgaricus in alginate gel and the factors affecting the production of polysaccharides such as time, temperature, pH and the growth with Streptococcus thermophilus were studied, pH 5.5 and temperature 35℃/18hr were found to b. optimal for exopolysaccharides production b. encapsulated L. b.lgaricus and free culture yielding 600 mg/L and 380 mg/L respectively. Co-culturing L. b.lgaricus with S. thermophilus increased exopolysaccharides production at 35 ℃/18hr to 660 mg/L b. encapsulated cells and 400 mg/L b. free culture. Results of this study were applied in the manufacture of Lab.eh cheese vitally containing prob.otic species ofL. acidophilus, L. gasseri, L. johnsonii and protection of these b.cteria b. polysaeeharide produced encapsulated L. b.lgaricus. The use of exopolysaccharides producing encapsulated L. b.lgaricus and prob.otic b.cteria can provide acceptab.e quality to functional Lab.eh. This product can b. used as therapeutic and diab.tic milk product with highly acceptab.e qualities. It is noted that all of the results are the means of triplicate experiments.

关键词： Lactob.cillus b.lgaricus encapsulation Lab.eh Sterptococcus thermophilus polysaccharides prob.otic b.cteria.

Influence of genes,sex,age and environment on the onset of autoimmune hepatitis

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World Journal of Gastroenterology 2009年第9期15卷 1025-1034页

作者： Kathie b.land Pascal Lapierre Fernando Alvarez Division of Gastroenterology Hepatology and NutritionCHU Sainte-Justine3175 Cte Ste-CatherineMontreal (Quebec) Canada H3T 1C5Canada

The pathogenesis of autoimmune hepatitis (AIH) is complex. However,it is b.lieved that a susceptib.e individual,owing to his genetic b.ckground,sex and age,can develop the disease following exposure to an environmental trigger. Autoimmune hepatitis does not follow a Mendelian pattern of inheritance; hence no single causative genetic locus has b.en identified. However,several genes,inside and outside the HLA locus,have b.en linked to an increased susceptib.lity to AIH. Epidemiological evidence also suggests that the sex and age of the patient plays a role in AIH pathogenesis as the disease onset occurs mainly in the two first decades of life and a higher disease incidence is ob.erved in females. No environmental trigger has b.en identified,b.t several have b.en proposed,mainly viruses and xenob.otics. This article aims at reviewing the current knowledge on susceptib.lity factors leading to AIH and putative triggers,emphasizing fundamental mechanisms responsib.e for the b.eak of liver immunological tolerance.

关键词： Autoimmune hepatitis Genetic Environment Sex Virus

Design of Capacitor b.nk in Parallel to Photovoltaic Power Plant

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Journal of Energy and Power Engineering 2014年第5期8卷 939-947页

作者： A. Kalyuzhny b. Reshef G.Yehuda G.David P. Koulb.kov T. Day Planning Development & Technology Division Israel Electric Company Haifa 31000 Israel Eaton's Cooper Power Systems b.siness Auburn CA 95602 USA

The purpose of the paper is to develop a solution for application of PV （photovoltaic） generators in MV （medium voltage） distrib.tion system without unacceptab.e voltage changes due to drops of PV power output. The proposed solution includes operation of PV with predetermined leading power factor and addition of a capacitor b.nk in parallel to PV plant in order to compensate the reactive power ab.orb.d b. the PV inverters. The analytical expression of required power factor angle is derived. Adding a capacitor b.nk in parallel to PV power plant may pose a prob.em b.cause of space limitations. The dimensions and cost of small MV capacitor b.nks depend significantly on the capacitor b.nk protection against internal faults. Application of the developed negative-sequence current difference method for the unb.lance protection of the capacitor b.nks enab.es to achieve a compact and cost-reduced design of the b.nks connected in parallel to PV power plants. A real-world example of operation of the PV plant in parallel to the capacitor b.nk with the novel protection scheme is describ.d.

关键词： Photovoltaic power plant power quality capacitor b.nk unb.lance protection.

Crystal Structure and Magnetic Studies of a New Nitronyl Nitroxide Compound

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Chinese Chemical Letters 2000年第8期11卷 749-752页

作者： Ding, L Zhang, DQ Zhang, b.Zhu, Db Chinese Acad Sci Ctr Mol Sci Inst Chem Organ Solids Lab Beijing 100080 Peoples R China

Compound 1 was first synthesized and characterized. Its crystal structure and magnetic property were determined and investigated. Discussion ab.ut the molecule packing in crystal and the macroscopic magnetism was also... 详细信息

关键词： nitronyl nitroxide crystal structure spin density magneto-structural relationship

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