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  • 2018-12-10 05:50发布了问答

    通常用溶液凝胶法制备的粉体材料有哪些?每种材料有哪些应用
     
    264人看过
  • 2018-11-16 05:39发布了问答

    矿物硬度的附:常见矿物的硬度
     
    284人看过
  • 2017-03-13 23:29发布了问答

    海信65mu8600uc是不是第三代量子点
     
    338人看过
  • 2016-12-01 04:05发布了问答

    瓷器的密度是多少?(不是要计算的物理题)
    告诉我吧,一般的瓷器密度是多少?我只想知道这个。 Z好2个格式都写上 g/cm3 kg/m3
    356人看过
  • 2015-08-01 11:26发布了问答

    纳米材料与高分子合成材料有哪些方面的区别?
     
    841人看过
  • 2015-05-26 03:42发布了问答

    什么是纳米?定义是什么?
     
    871人看过
  • 2015-04-20 15:11发布了问答

    长虹65q2c是量子点电视机吗
     
    356人看过
  • 2014-10-21 03:07发布了问答

    精油 能产生负离子吗
     
    296人看过
  • 2011-05-09 09:44发布了问答

    吐温溶解植物精油
    吐温溶解植物精油 (1)哪种吐温较能溶解植物(精)油?1体积能溶解多少体积植物(精)油? (2)植物油混入吐温后,加入水中得乳化液,哪种吐温的乳化液较澄清透明?
    462人看过
  • 2010-12-28 03:34发布了问答

    金属材料和无机非金属哪个相对好就业点
    我是郑州大学大1,大2就分专业了,还有高分子
    582人看过
  • 2009-05-20 23:18发布了问答

    纳米盘分散的的压缩包要怎么合到一起?
    每个里面都有一个同名的文件夹 解压出diyi个 就显示了和25个压缩文件加起来一样的大小 剩下的要怎么办? 里面的东西好像都是重复的 要不要依次解压? 完成后这些分卷能不能删?
    531人看过
  • 2009-04-15 21:30发布了问答

    紫外线消毒为什么波长在254纳米效果Z好?
    是不是这个波长对微生物伤害Z大?高手给点杀菌机理方面的
    480人看过
  • 2008-05-26 18:40发布了问答

    如何判断属于胶体还是溶液
    例如澄清石灰水, 氢氧化铝胶体 蛋白质溶液 碘的四氯化碳溶液.油水混合物.只不过是个例子,我要的是方法,如何判断出来类似的题.
    341人看过
  • 2007-05-22 05:30发布了问答

    纳米技术现在存在的问题是什么?
    纳米技术有哪些优点缺点呢? 纳米技术Z多应用在什么方面?
    694人看过
  • 2007-04-15 19:28发布了问答

    什么是表面纳米技术
    详细了解表面纳米技术
    330人看过
  • 2006-10-18 01:02发布了问答

    纳米材料的摘要翻译(7)
    Drivers and Directions In the United States, the EPA and NIOSH are spearheading research into nanoparticles and their associated health risks through a variety of funded research projects and information exchange programs. NIOSH’s Web si... Drivers and Directions In the United States, the EPA and NIOSH are spearheading research into nanoparticles and their associated health risks through a variety of funded research projects and information exchange programs. NIOSH’s Web site also cites its participation in the multiagency National Nanotechnology Initiative and the Nanoscale Science, Engineering and Technology Subcommittee of the National Science and Technology Council’s Committee on Technology. But on the whole, the study of nanotechnology in the workplace is still in its infancy. Or as Keith Rickabaugh, technical director of materials and analytical services for RJ Lee Group, Monroeville, Pa., puts it, “what has been learned is that there is much more to learn.” Rickabaugh goes on to say that, “We need to learn how to economically/reasonably establish safe work practices and engineering controls to protect workers from an ‘unknown’ exposure risk. That includes performing studies to document the health risks of nanosized particles, and training workers to understand and be able to characterize those materials.” 展开
    544人看过