二-十进制

The invention relates to a preparation and separation method of docosapentaenoic acid methyl ester and docosahexaenoic acid methyl ester.

本发明涉及二十二碳五烯酸甲酯和二十二碳六烯酸甲酯的制备和分离方法。

Their mesogenic temperature ranges cover from 78 to 110 degrees. The milting points of compound 19a and 19b are 43.9 ℃ and 74.8 ℃ respectively while their clearing temperatures are 92 ℃ and 112 ℃. Their mesogenic temperature ranges cover from 36 to 57 degrees. They are suitable for formulating eutectic mixture and for the applications in PDLC, reflective liquid crystal display, and IR modulator.

第三系列同样以2，3-邻二氟苯二炔基二苯基为主体，但相对碳链长度和前一系列相反，将邻二氟苯二炔基端的碳数固定为6，二苯基端碳数分别为2与3，合成出向列型液晶化合物19a与19b，观察到熔点与澄清点温度均较前一系列化合物低，熔点温度下降约20~30oC，澄清点温度下降约50~70 oC，液晶相温度范围约36~57 oC之间，期望能应用在PDLC，反射式液晶显示器，及红外光调节器上。

Phthalic acid esters are widely used in the many fields of industry. So many countries including China have come to pay attention to them and make up the codes for limiting the content in some products such as textile. By combining international codes, the thesis selects coating and textile that have close relative with people as objections. The research results are as follows:1. The thesis has established the textiles preparation method by a series of experimentations such as extraction solvent, extraction time, solid-phase extraction. The average recoveries of eleven phthalates are from 80.30% to 98.00%, and the relative standard deviations from 0.59% to 2.56%, the results show that this method is accurate and credible.2. The thesis set up the simultaneous determination of benzene, toluene, xylenes and phthalates in coatings.

邻苯二甲酸酯类化合物被广泛地应用在工业领域的各个方面，国际上已经开始重视邻苯二甲酸酯作为一种内分泌干扰素的危害性，对在一些产品中的用量作出了限制，但没有具体的分析测定方法，本论文结合国际法规选择了与人们生活密切相关的涂料和纺织品来研究其中邻苯二甲酸酯类环境激素的测定方法，研究内容如下：(1)通过对提取溶剂、提取方式、提取时间的选择实验以及固相萃取的一系列条件实验，首次建立了纺织品中测定邻苯二甲酸酯类环境激素的前处理方法，并对分析方法作了准确度、精密度验证。

Evidence suggests that 1 under more stable stratification, the basic flow, if moving faster at low and high levels (particularly in the presence of jets there), allows a resulting meso-β unsteady wave to propagate eastward with respect to basic flow and even at greater velocity compared with it; 2 vertical windspeed shear of basic flow causes instabilities of the TWT perturbation; 3 considering the second derivative of basic-flow wind with respect to z (denoted by zz≠ 0 which is simply given as β* hereafter) the expression for the phase velocity of vortex Rossby wave is obtained, which is unidirectional in propagation with respect to basic flow; 4 VRoW has its physical origin from β*, i.e., from z-varying heterogeneities of y-direction averaged vorticity of the basic flow field; 5 VRoW phase velocity is associated with zonal wave number k, its energy is dispersive and the group velocity exists in the x direction; 6 when windspeed meets the condition of β*, TWT disturbance instability may be that of mixed VRoW and gravity wave; 7 if basic flow is subject to linear shear but does not meet the condition of β*, the TWT instability is that of inertia-gravity wave.

在大气层结比较稳定的情况下，如果基本气流在低层和高层较大(有可能存在低空急流和高空急流)，此时产生的β中尺度不稳定扰动相对于基流向东传播，甚至于快速向东传播。基本气流在垂直方向上的风速切变对于中尺度横波型的扰动起着不稳定的作用。如果考虑基流的二次切变，可以得到涡旋Rossby波的相速度表达式，涡旋Rossby波相对于基本气流是单向传播的。涡旋Rossby波产生的物理根源是基本流场的风速二次切变，亦即基本流场y方向的平均涡度在空间z方向上的不均匀所致。涡旋Rossby波的相速度与纬向波数也有关，它的能量是频散的，其在纬向x方向也存在群速度。在基本流场的风速存在二次切变时，横波型不稳定可能是混合的涡旋Rossby重力波的不稳定；而在基本流场的风速仅仅存在线性切变，不存在二次切变时，横波型扰动的不稳定则是重力惯性波的不稳定。

In this century ,besides the never-ceasing regional conflicts and wars of various sizes ,humans waged , in less than twenty years' time ,two unprecedented world wars that literally wiped out millions of lives; the confrontation between communism and capitalism that lasted over seventy years split the world into two camps, east and west ,that maintained two distinct and separate economic systems

在本世纪，除各种各样的大小以外从未停止的地方冲突和战争，人类发起了，近二十年的逐字地消除成千上万生命的二次史无前例的世界大战；交锋在持续经过七十年的共产主义和资本主义之间分裂了世界成二阵营、东部和西部，维护二分明和分开的经济体制。

Relative retentions of 12 S-compounds on 4 different liquid phases were given.

给出了十二种硫化物在沙鱼烷、苯二甲酸二壬酯、磷酸三甲苯酯及亚氨基二丙腈四种柱子上的相对保留值。

With the aid of 〓P NMR examination for the process and ESI-MS/MS analysis of the derivatized products from the reaction intermediate, it is found that the corresponding phosphoryl chloride is generated after mixing the hydrogen phosphonate derivative with chlorodiisopropylamine, and they react with amino acid, amino acid methyl ester, dipeptide methyl ester or N-methyl imidazole carboxyl alkyl diamine respectively to form the desired products.

利用〓P NMR对反应过程监测以及对反应中间体衍生化后产物的ESI-MS／MS检测分析发现，氢亚磷酸二酯与氯代二异丙胺反应首先生成了磷酰氯中间产物，它继续与氨基酸、氨基酸甲酯、二肽甲酯、1-甲基咪唑-2-酰基烷基二胺等反应生成了目标产物。

The premixing self-assembly solution of horseradish peroxide with poly(sodium 4-styrenesulfonate) is made by blending HRP and polyelectrolyte PSS,and the active.enzyme muhilayer biofilm is fabricated by altemate deposition of and PDDA on the surface of negative ionized PET.

以阳离子化的辣根过氧化物酶和阴离子聚苯乙烯磺酸钠的预混合溶液，与阳离子聚电解质聚二甲基二烯丙基氯化铵通过逐层组装，在阴离子化聚对苯二酸乙二酯表面构建了多层生物活性膜。

One chamber near the epidermis was filled with OCAs, and the other one was filled with isotonic saline. The dynamic changes in transmittance and the skin thickness were monitored after the application of six saturated alcohols to in vitro skin samples. From the observed results at 60 minutes, the optical clearing effects of six OCAs, i.e., glycerol, polyethylene glycol 400 (PEG400), polyethylene glycol 200 (PEG200), 1, 3-propylene glycol, 1, 4-butanediol and 1-butanol, showed in the descending order.

针对离体皮肤，建立模拟在体环境的给药方法(皮肤表面给药、真皮面与等渗生理盐水作用)，考察6种饱和醇类试剂作用后皮肤厚度及透射光强的变化。60分钟的动态观测发现，各试剂均能产生不同程度的光透明作用，皮肤光透明效果由强到弱依次为：甘油、聚乙二醇400(PEG400)、聚乙二醇200(PEG200)、丙二醇、丁二醇、正丁醇。

The purpose of this research is to discuss the decision of negotiation types and processes. The conponents of the decision-making of each transaction include "the counterpart" and "the deal". The Potential Value of Social Transaction and The Potential Value of Economic Transaction can distinguish between the "quasi-economic man" and the "quasi-social man", two different types of psychological construction. This research makes a point of dyad according to a quasi-economic man and a quasi-social man which can distinguish among three different dyadic decisions of negotiation types:the dyadic decision of negotiation type between a quasi-economic man and a quasi-economic man, the dyadic decision of negotiation type between a quasi-social man and a quasi-social man, and the dyadic decision of negotiation type between a quasi-economic man and a quasi-social man.

摘要 本研究旨在探讨谈判决策类型与过程之研究，交易双方在谈判时不只会考虑交易事物「事」，也会考虑交易对象「人」，本研究以社会交易潜在价值和经济交易潜在价值所表现出的交易权衡模式，把个人区分为准经济人与准社会人两种不同类型的人，本研究旨在分析谈判双方如何讨价还价达成交易的过程，特别重视二位体的观念，根据准经济人决策权衡模式与准社会人决策权衡模式的组合区分出准经济人与准经济人的二位体谈判决策类型（A-1类型）；准社会人与准社会人的二位体谈判决策类型（A-2类型）；准经济人与准社会人二位体谈判决策类型等三种不同的类型。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。