医学论文范文翻译

NaQing sex deep overburden front teeth tooth meets the clinical experience treatmentAbstract: objective to investigate NaQing sexual front teeth tooth overburden match not deep treatment of factors, correction method and the matters needing attention. Methods selection NaQing sex deep overburden front teeth and 18 cases, are not case tooth correction. Results treatment completion time 15 to 21 months, average months. Correction by first teeth together, facial side cover normal appearance was coordination. Conclusion anterior tooth NaQing sex should be repeated in deep choosing good indications fits the tooth under treatment.

The goal understands the room air pollution the degree and to the human body health influence. The method October, 2007 to December, to the Dongguan Wan city some plot's 50 varying degree repair, housing less than a half year housing, carries on many item of air pollution target monitor, and to 120 family members has carried on the inquiring survey. Finally the carbon monoxide exceeds the allowed figure more than 1 time; The carbon dioxide exceeds the allowed figure 12 times; The formaldehyde exceeds the allowed figure more than 40 times; The benzene, the toluene, the ethyl benzene, the xylene exceed the allowed figure separately 8-13 times; The bacterium target surpasses standard times. In 120 by the investigation object, some 80 bodies appeared the bad symptom. In the conclusion room air the formaldehyde pollution is most serious, moreover the indoor spatial pollution is harming human body's health directly.

BH3-THF(BTHF)是一剂的选择等几种合成的转变 最近,我们寻求减少和 borane-labeling合成的 引入了一种氘试剂在一个高效、标签选择性时尚。 虽然一些氘分子标记的试剂,如NaBD4,LiAlD4和李(醋酸仲丁)3BD 众所周知,BD3-THF提供选择性氘插入,否则不 理想的试剂是高度稳定相对容易使用,特别是作为 解决方案。作为borane-Lewis基地复合体中找到everincreasing作用有机食品 转变,尤其是borane四氢呋喃,我们开始考虑合成, BD3-THF稳定性和综合效用的。我们要报告提出了一种改进的合成 BD3 -丙烷、稳定性的研究和应用的hydroboration代表 烯烃。 选择的方法产生B2D6(1)进行了报道的程序褐色 和同事产生非用硼trifluoride气体的刘易斯酸 glyme 因其纯度高、低挥发到其他glyme式溶剂, triglyme被选为溶剂的选择。当硼氢化钠、直接NaBD4取代的 布朗的文学的应用条件来生成非成功 1米的复杂的解决方案borane-d3丙烷定量。四是产生复杂 介绍了非晶态合金(B2D6标示)燃气1从反应堆成为一个独立的 四、反应器re-distilled含有锂铝合金deuteride在使用前 (计划)。这个反应证明服从累加起来了,在同样的产量 在注塑或组分比例。 BH3-THF相似,BD3-THF也不稳定,室温长时间的 商业BH3-THF稳定,当硼氢化钠、NaBD4与使用稳定 在场的硼氢化钠作为稳压器是已知的创造安全问题 一些不良的影响,我们在最近完成了详细研究 BH3-THF找到更有效的稳定和发现,某些妨碍胺 优越的BH3-THF剂相比,当硼氢化钠。1米BTHF解含) 并购N-isopropyl-N-methyl-tbutylamine(NIMBA)显示优越的热性能、直接 从而提高相似的稳定性影响时,为BD3-THF观察 N-isopropyl-N-methyl-t-butylamine稳定与 M”(NIMBA)。这些方法 显示任何显著的降解,内容以11B氢化物时储存在4 - 8℃ 至少6个月。