被引量: 0发表: 2009年 ZYJT公司物资集中采购管理研究 集中采购作为促进中央企业降本增效,实现保增长目标的重点举措之一,ZY集团将推进企业大力开展实施,并在2013年年底完成对下属企业集采工作的全面部署。ZYJT公司作为ZY... 赖小禹 - 北京交通大学 被引量: 1发表: 2015年 加载更多来源期刊 中国商界 0关于...
在一系列致力于提高现代和未来水面舰艇生命力的措施中,提高其雷达隐蔽性占据主要地位.这是因为采取传统措施(火力和防弹装置,无线电电子抑制,伪装等等)提高舰艇生命力现已收效甚微.人们对提高水面舰艇雷达隐蔽性这一问题之所以兴趣日浓,其原因之一是许多国家海军舰艇武备组成中都包括非常有效的海上作战武器,即带雷达自导...
首次书写世界环境史全貌的入门指南环境史先驱者里程碑之作,梅雪芹教授全新修订译本历史视野全新开启,人与环境"同舟共济"这本简洁明快的小书,凝聚了一位智者深思熟虑的新学术思考,曾经引导成千上万学人进入环境史这个迷人的领域,探研古往今来不断变幻的人与自然关系.作为一本开风气之先的入门书籍,其中的许多真知灼...
Research on a Precise Grinding Device for Servo Valve Spool The grinding of valve core and valve sleeve plays a key part in the manufacturing process of electro-hydraulic servo valve, and the grinding precision of t... G Wang,Y Zhang,X Pan 被引量: 0发表: 2018年 ...
R Llevadot,G Marqués,M Pritchard,... - 《Biochemical & Biophysical Research Communications》 被引量: 25发表: 1998年 Multi-phase analysis of uptake and toxicity in zebrafish: Relationship to compound physical-chemical properties This chapter contains sections titled: Introduction: The Larval Zebrafish...
Ex situ seed conservation is one of the most effective ways to conserve wild forest tree species. We present examples of the millennium seed bank in the United Kingdom and Japanese seed bank projects and examine problems with the seed conservation of wild species. To conserve the seeds of wild...
EA Deisenhammer,M Huber,G Kemmler,... - 《European Archives of Psychiatry & Clinical Neuroscience》 被引量: 41发表: 2007年 The role of general practitioners in prevention of depression-related suicides. As over half of all suicide victims contact their general practitioners within four weeks bef...
目的:建立人参Panax ginseng C.A.Mey.不定根诱导体系并优化液体培养增殖条件.方法:以MS为基础培养基,通过正交试验,研究生长素NAA和IBA对人参不定根诱导的影响;考察不同NAA,IBA浓度及其组合浓度对人参不定根生长和皂苷含量的影响.结果:诱导人参不定根最佳外植体类型为种胚,最佳固体培养基为MS+NAA 0.6 mg/L+IBA ...
Problem to be solved: to provide a composition and a formulation of a micronized Wheaton jelly having a viscosity controlled so as to remain substantially localized without moving or moving slightly from the damaged region for the repair and / or regeneration, when delivered to the damaged region...