溶剂

The solvent effect of five azo-metal complex dyes in fourteen solvents was studied with Nicol theory for the first time, and the main factors affecting the absorption spectrum of azo-metal complex dyes were found.

首次用Nicol理论研究了五种金属络合偶氮染料在14种不同溶剂中的溶剂效应，找到了影响溶液中金属络合偶氮染料电子吸收光谱的主要因素。

The conclusions were as follows: theνO-H andνC=O IR absorption maxima shifted towards higher wave numbers after imprinting 17β-estradiol on TFMAA-co-TRIM copolymer with the red shift of theνO-H groups being apparent after precipitation polymerization for 16h while that forνC=O groups being observed after polymerization for 24h. A strong interaction between TFMAA and 17β-estradiol was confirmed by the high selectivity for 17β-estradiol, as indicted by the values of the separation factor of isomers of 17β-estradiol/17α-estradiol (2.28) and the imprinted factor (3.01). Particle diameter of TFMAA-co-TRIM polymer was between 300 nm and 1.5μm, which suited well for solid phase sorbent throughout at low column pressure. The recognition of imprinting TFMAA-co-TRIM polymer for sterol molecules was driven by enthalpy eluted with acetronitile, and low temperature was in favor of the separation of sterol structure analogues on imprinting column. TFMAA-co-TRIM polymer possessed of determinate anti-heat stability, with melting point beginning at 255.84℃, Tp=257.40℃, control TFMAA-co-TRIM polymer and imprinting TFMAA-co-TRIM polymer were respectively decompounded at 267.79℃and 343.11℃, and solid micro-extraction noddle prepared by the special polymerization also showed definite recognition for 17β-estradiol by GC/MS detecting at 270℃. By selection of various washing and elution solvents, elution reagents of close polymerization system were of more advantage in template molecules retention and recognition on molecularly imprinted solid phase extraction column. At a certain extent, progesterone, 17α-estradiol, 17β-estradiol and 4-androstene-3, 17-dione could be intercepted on the MISPE column. Especially, MISPE had high selectivity for progesterone, and imprinting TFMAA-co-TRIM polymer could achieve adsorption balance within 50 min by absorption kinetics test for 17β-estradiol. However, MISPE column showed better selectivity and enrichment property for 17β-estradiol than C18 and CSPE columns according to the data from HPLC and GC/MS analyses. Recovery of 17β-estradiol on MISPE column was up to 85.5% while when prime extracting solution of milk powder was sampled, the recovery of CSPE and C18 columns were 43.7% and 30.7%, respectively.

通过研究阐明：紫外聚合产物TFMAA-co-TRIM中的νO-H振动吸收峰在聚合16h后红移，νC=O振动吸收峰在聚合24h后红移；TFMAA-co-TRIM对雌二醇异构体的印迹因子达到了3.01，α为2.28，优于其它功能单体参与得到的聚合物识别特性；TFMAA-co-TRIM聚合物粒径介于300 nm至1.5μm之间，作为色谱固定相具有良好的通量和低的柱压；在乙腈流动相中，TFMAA-co-TRIM分子印迹固定相的分离过程主要被焓驱动，低温有利于分子印迹固定相分离甾醇结构类似物；TFMAA-co-TRIM分子印迹聚合物在255.84℃时开始熔融，Tp=257.40℃，聚合物CP的降解温度在267.79℃，MIP降解温度在343.11℃，制备的固相微萃取头初步经GC/MS 270℃的耐热性测定；不同的洗提溶剂筛选证明了选择接近聚合溶剂的洗脱体系更有利于MISPE发挥识别效应；分子印迹固相萃取柱对孕酮、17α-雌二醇、17β-雌二醇和雄烯二酮都具有不同程度的保留特性，可作为此类化合物的吸附材料，特别对孕酮强保留的富集特性，可作为孕酮的选择性识别吸附剂，其分子印迹聚合物对17β-雌二醇的吸附动力学测定显示在50 min内基本达到吸附平衡，具有作为传感器核心敏感材料的潜力；对比萃取奶粉中17β-雌二醇性能，MISPE柱比非分子印迹固相萃取柱和C18柱具有更高的保留，回收率依次为85.5%，43.7%和30.7%。

Such a boundary must be intimately related to the reaction between solvent and nonsolvent in the coagulation bath.

这样界限必须亲密地与在溶剂和非溶剂之间的反应有关在凝固浴。

The effect of nonsolvent/solvent interaction parameterx_(12 on the binodal curve is relatively complicated.

而非溶剂/溶剂之间相互作用参数x_(12)的变化对相图双节线位置的影响比较复杂。

It is concluded that two factors (convection evaporation and solvent/nonsolvent exchange rate) are important in controlling membrane morphology for gas separation.

结果表明，对流蒸发和凝胶过程溶剂/非溶剂的交换速率对形成非对称结构的高渗透性能气体分离膜有着重要的影响。

Methods: The two methods of nonsolvent process and solvent process were adopted to prepare oxamyl. Oxamyl was prepared in water in the first one and in acetone in the second. By the comparisons of productive cost, production purity, operation safety and equipment cost, a proper process for preparation oxamyl was adopted.

制取杀线威有两种不同方法，即非溶剂法和溶剂法，前者采用水为反应介质，后者采用丙酮为反应介质，从产品制造成本，产品纯度，操作环境的安全性以及生产设备投资等方面进行比较，确定可行的合成方法。

It is found that with the increase of solvent/polymer interaction parameterx_(23 or nonsolvent/polymer interaction parameterx_(13 the miscibility gap decreaseses.The effect of nonsolvent/solvent interaction parameterx_(12 on the binodal curve is relatively complicated.

2通过考察相互作用参数对三元体系相图的影响，发现随着溶剂/聚合物之间相互作用参数x_(23)或者非溶剂/聚合物之间相互作用参数x_(13)的增加，均相区减小。

Preparation of low density poly (4 methyl 1 pentene) foam is described.The thermal analysis method is utilized to measure on line the gelation of pmp polymer in the binary solvent (durene/naphthalene) or nonsolvent system.

在聚-4-甲基-1-戊烯pmp）低密度泡沫的制备中，利用示差扫描量热分析仪对pmp聚合物在均四甲苯/萘所组成的溶剂/非溶剂二元体系中的凝胶化过程进行在线测量。

The effects of nonsolventγ-butyrolactoneon the behavior of phase separation of PC casting solution were studied at different operating temperature according to the LCP correlation.It was found that the phase separation behavior of PC/NMP/γ-GBL also exhibited well agreement with the LCP correlation.Therefore,the maximum content ofγ-GBL in casting solution could be obtained according to the binodal line of the system,which provided scientific basis for the composition of casting solution.

实验进一步考察了不同温度下非溶剂γ-丁内酯对PC铸膜体系相分离的影响，并依据LCP线性回归结果外推计算三元体系的双节线，由此得到了铸膜液体系中非溶剂添加剂的上限含量，为铸膜液体系的构建提供了可靠的依据。

The CPP was separated into five fractions using fractional precipitations by solvent/nonsolvent technique. Densities for binary mixtures of five fractionated and unfractionated CPP which contains a mass fraction of 30 % chlorine with solvents were determined. At a fixed temperature, concentration and solvent, the densities for binary mixtures of fractionated and unfractionated CPP with solvents have the same value.

用沉淀分级方法对氯含量为30％的氯化聚丙烯进行分级，得到5种窄分子量的级分，测定了氯化聚丙烯的不同级分与不同溶剂组成的二元混合物溶液的密度，在溶剂一定、浓度一定、温度一定时，不同级分氯化聚丙烯溶液的密度是相同的，不受分子量及其分布的影响。

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题，你可以随时联系我。