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已读[467]
发布： 2013/06/22 14:33:11
挥发酚的测定一般先采用水蒸汽蒸馏分离,然后用4-氨基安替比林比色测定, 传统的水蒸汽蒸馏装置测定挥发酚耗时长,分析准确度、精密度差。...1.1主要仪器和试剂 UV2400 紫外可见分光光度计(日本岛津); 新型自动水蒸汽蒸馏装置(瑞士Buchi公司),普通玻璃磨口水蒸汽蒸馏装置。 ...
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已读[223]
发布： 2013/06/22 14:33:07
原则上,当观察含液体的标本时,一般都要盖上盖玻片;若液体中含有酸、碱等腐蚀性化学物质时,应把盖玻片的四周用石蜡或凡士林封住,然后观察。但由于进行中药显微鉴定时,经常要用这一类试剂,不可能都封固,因此要特别小心,防止液体流到载物台上,吏不要沾到物镜上。 ...
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已读[214]
发布： 2013/06/22 14:33:04
工作人员介绍,蔬菜里一般残留的农药有敌敌畏、毒死蜱等,比如敌敌威的要求含量,不能超过每公斤0.2毫克。我们的记者,也亲自体验一下,...之后,将两份牛奶样品,分别滴三滴在两个安全检测试剂卡上,进行检测。 五分钟后,检测结果出炉:原来一开始记者左手中拿的牛奶样品含有三聚氰胺。...
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已读[225]
发布： 2013/06/22 14:32:56
由于赘肉密度很低,且吸脂前打了相等量的膨胀试剂,再加上术后会肿胀,所以即使抽脂5000毫升以上,术后体重也不会立即明显下降。一般而言,抽脂后一、两年间体重可减轻5-10%,约3-5公斤。 专家教授说,因大部分求美者在花钱抽脂后,身材曲线变得玲珑有致,所以较有信心及恒心来控制饮食和从事运动,...
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已读[531]
发布： 2013/06/22 14:32:53
“从我们的结果来看,送检样品一般不会有毒副作用,只是一些有问题的产品宣称的功能达不到期望值。”...工作人员一边说一边演示,比如这个青菜,先切成小片,然后称重2克,放到缓冲液里,摇晃浸泡10分钟,再加入试剂,...
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已读[209]
发布： 2013/06/22 14:32:50
HealthCanal.com BD is a leading global medical technology company that develops, manufactures and sells medical devices, instrument systems and reagents . The Company is dedicated to improving people's health throughout the world. BD is focused on improving drug ...
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已读[203]
发布： 2013/06/22 14:32:46
SYS-CON Media (press release) BD is a leading global medical technology company that develops, manufactures and sells medical devices, instrument systems and reagents . .... an intensive four-day schedule of keynotes, general and breakout sessions, and our bustling Expo Floor - that ... and more »
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已读[206]
发布： 2013/06/22 14:32:43
China Daily Phosphoric acid is widely used as a chemical reagent in pharmacy, food and fertilizer industries. Wet process phosphoric acid plays a very important role due to industrialized production. Guizhou Chanhen ... of phosphoric compound fertilizer, said the ...
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已读[204]
发布： 2013/06/22 14:32:40
Sacramento Bee One of Mitsubishi Chemical Medience's primary business areas is their IVD business, which includes the development, sale, export, and import of in vitro diagnostic reagents and instruments. Mitsubishi ... This is a general interest news site. Sometimes ... and more »
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已读[187]
发布： 2013/06/22 14:32:33
AllAfrica.com In terms of the inadequate healthcare system in the country, do ministers use the healthcare services which they deem fit for the general public? Or are their medical needs looked after in hospitals overseas? ... The organisation described pregnant ...
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