二分子

The effect of impurities in DMDAAC monomer solution, such as NaCl, allyl chloride, allyl alcohol, allyl aldehyde, active carbon, low molecular polymer of DMDAAC, yellow residua, Fe~(3+), Fe~(2+), Cu~(2+), on the polymerization reactivity of preparing PDA with 30％cationicty was researched in this paper.

本文研究了二甲基二烯丙基氯化铵单体溶液中氯化钠、烯丙基氯、烯丙醇、烯丙醛、活性炭、低分子聚合物、黄色物质、Fe~(3+)、Fe~(2+)、Cu~(2+)等杂质对合成阳离子度为30％PDA的聚合反应性能的影响。

A chiral phase transfer catalyst, N-benzyl quinine bromide, was synthesized from natural chiral compound. And 2,5-bimethyl-4-(3-nitrobenzene)-1,4-bihydrogenation pyridine-3--4-methyl formate (viz. nitrendipine) was synthesized by this chiral phase transfer catalysis, and characterized by elemental analysis, infrared spectrum,1H nuclear magnetic resornace, and X-ray single-crystal diffraction.Key words: ammonium; chiral phase transfer catalyser; crystal structure

通过对天然手性物质进行修饰合成手性相转移催化剂N-苄基溴化奎宁，并对目标分子2，5-二甲基-4-(3-硝基苯)-1，4-二氢吡啶-3-甲酸乙酯-5-甲酸甲酯进行不对称催化合成，并通过红外光谱和核磁共振氢谱对化合物进行了表征，用X射线单晶衍射法测定了该化合物的晶体结构。

Recent studies have revealed that APP may form dimers, and trans-dimerization will promote cell adhesion.

近年来研究发现，APP分子间可以进行二聚化，并且反式的二聚化作用有促进细胞黏附的功能。

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Double-antibody sandwich method for determination of 2 price or value of more than two macromolecular antigen, but not for the determination of haptens and small molecules unit antigens, because of two points can not form the sandwich.

双抗体夹心法适用于测定二价或二价以上的大分子抗原，但不适用于测定半抗原及小分子单价抗原，因其不能形成两位点夹心。

The effect of p-chloromercuri benzoate on sucrase is anticompetitive inhibition, and its Kj is 0.75mmol/L.

二巯基苏糖醇修饰，NR／R单向SDS-PAGE、NR／R双向对角线SDS-PAGE的结果均表明蔗糖酶分子内没有二硫键存在。

Quantitive coordinate solvent-DME was added during the preparation reaction or crystallization, sodium ion in complex 1, 2 and 4 will be extracted and become free one, thus new solvated anion-cation pair complexes [2Ln2][Na22] Ln = Nd (5, Sm (6), Yb (7) were formed.

在反应或者结晶的过程中加入一定量的乙二醇二甲醚，配合物1，2和4中与双芳氧鞠位的钠离子被DME分子萃取出来，生成阴阳离子对配合物[_2Ln_2][Na_2_2]Ln=Nd(5，Sm(6)，Yb(7)。

Octacosanol through the molecular distillation technology and high-vacuum separation technology at bee wax and rice bran extract, octacosanol the treatment of excessive calcium osteoporosis, treatment of high cholesterol and high LDL blood type as well as to promote blood and activation of cell cycle, and enhance endurance, energy and stamina, and many other physiological functions; taurine are the first in 1827 at the Ox bile found in a special amino acid, commonly found in natural biology of the human body in vivo an essential nutritional elements, known as "the fulcrum of the body's health balance."

二十八烷醇是通过分子蒸馏技术和高真空分离技术在蜂腊和米糠中提取，二十八烷醇对治疗血钙过多的骨质疏松，治疗高胆固醇和高脂蛋白血型以及促进血液循环和活化细胞，增强耐力、精力和体力等众多的生理功能；牛磺酸是1827年首先在牛的胆汁中发现的一种特殊氨基酸，普遍存在于自然界的生物体内人体内一种必不可少的营养元素，被誉为&人体平衡的健康支点&。

The degradation of 2, 4-dichiorophoxyacetic acid (2, 4-D) by ozonation combined with sonication (03/US) was investigated. Based on the authors' first paper about the synergistic effect of ozone and US, this paper presents intermediate products of 2, 4-D degradation. The main intermediates were 2, 4-dichiorophenol, benzopuinone, hydroquinone and organic acids, such as maleic acid and oxalic acid and soon.

利用臭氧超声波联合工艺对苯氧羧酸类除草剂2，4-D进行降解研究，在前文探讨臭氧超声波之间协同效应的基础上，确定其中间产物种类主要有2，4-二氯苯酚、苯醌、氢醌以及小分子酸如顺丁烯二酸、草酸、甲酸、乙酸等。

Various influence factors of solid boundaries on discontinuuties in the gas molecular distribution function are considered and a bimodal two-stream relaxing distribution is suggested.

分析了固体边界对分子分布函数不连续性的各种影响因素；提出了双峰二向流弛豫分布，将它应用于麦克斯韦输运方程以研究二平行平板间的热传导，得到了封闭解。

For a big chunk of credit-card losses; the number of filings (and thus charge-off rates) would be rising again, whether

年美国个人破产法的一个改动使得破产登记急速下降，而后引起了信用卡大规模的亏损。

Eph. 4:23 And that you be renewed in the spirit of your mind

弗四23 而在你们心思的灵里得以更新