查询词典 isomers

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%。

The relativity between biodegradability and nonyl branches structure for the isomers of nonylphenol is studied by the sequencing batch activated sludge process for NP accumulating behavior analyses in water environment.

为分析壬基酚在环境中的积累行为，基于间歇活性污泥实验和质谱解析方法，结合环境水体中NP检测分析，研究了污水生物处理过程中壬基酚同分异构体的生物降解差异与壬基分支结构的相关性。

In every case Werner investigated, the number of isomers found was equal to that expected for an octahedral complex.

沃纳调查了每一种情形发现，可找到的异构体数与所期望的八面体络合物数相等。

The two isomers, which are of opposite sign.

这两个异构体除了旋光度有相反的符号之外，其它所有的物理性质

All the physical properties should be identical except for the optical rotations of the two isomers, which are of opposite sign.

这两个异构体除了旋光度有相反的符号之外，其他所有的物理性质都应该是完全相同的。

SPRI-WM-005 is a new oxime ether compound, which has E and Z isomers.

氯苯肟唑（SPRI-WM-005）是含顺、反异构体的肟醚结构化合物。

The establishment and relaxation processes of the transient gratings, which are formed by two recording 514nm beams with different polarization directions, SS, PP, SP and ±45℃, are investigated. Using the weak absorption of the chromophores at 632. 8nm and the positive dichroism of the chromophores molecules, a kind of bi-photonic transient gratings, owing to the periodic distribution of Trans and Cis isomers, is established first time in azo-dye doped polymeric bulk sample.

实验考察了两束514nm的写入光在不同偏振情况下（SS，PP，SP和±45），在样品中形成的瞬态栅的建立和弛豫情况；利用偶氮生色团在632.8nm波段的微弱吸收和生色团分子的正二向色性，首次在块状偶氮聚合物材料中形成一种基于生色团反式和顺式异构体密度分布的双色光瞬态栅；利用瞬态栅的快速建立和弛豫，考察了其在衍射型全光开关方面的潜在应用。

The phosphoryl N→O migration reaction and ester exchange reaction on phosphorus of phosphoserine with methyl alcohol involving hexa-coordinate phosphorus intermediate 3 had been studied by MNDO method. The three isomers structures of 3 were discussed in detail based on the calculation results.

谭波用MNDO方法对磷酰化丝氨酸仿生化反应机理中所形成的六配位磷中间体(3)可能的3个异构体的结构及其反应活性进行了研究。

The three isomers structures of 3 were discussed in detail based on the calculation results. Among the six bonds in 3, the P_O bond between the phosphorus and carboxyl oxygen O3 was the weakest one, and could be easily broken to form a new penta-coordinate intermediate 4 which could yield the phosphoryl N → O migration product 5 by breaking the weaker P_N bond.

在六配位磷中间体3的6根键中，丝氨酸的羧基氧O3与磷之间的键最弱，最易断裂生成新的五配位磷中间体4， 4的P_N键断裂得到磷酰基的N→O转位反应产物5。

Polarimetry, the measurement of optical rotation, of a pharmaceutical article may be the only convenient means for distinguishing optically active isomers from each other and thus is an important criterion of identity and purity.

药用物质的旋光测定法，即测定光学旋转的方法，也许是用于区分具有光学活性的异构体的方法中唯一简便的方法。因此，该方法是鉴别和纯度的一个重要标准。

Singer Leona Lewis and former Led Zeppelin guitarist Jimmy Page emerged as the bus transformed into a grass-covered carnival float, and the pair combined for a rendition of "Whole Lotta Love".

歌手leona刘易斯和前率领的飞艇的吉他手吉米页出现巴士转化为基层所涵盖的嘉年华花车，和一双合并为一移交&整个lotta爱&。

This is Kate, and that's Erin.

这是凯特，那个是爱朗。