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According to the construction features of β- cyclodextrin, a comparison analysis is made between fragrance inclusion of BCD and mono - molecules of fragrance.

根据β-环糊精的结构特点,对BCD的香料包给和香料单体分子进行了对比研究,证明BCD与客体形成的是单分子包结,该包结在热稳定性、抗氧化性方面优于客体分子,有相当的实际应用价值。

According to the electrophilic substitution of α-Allocryptopin by ICl, it can be suggested that there are competitions of n-donors (such as N and O atom occurred in alkaloid or solvent molecules) with the conjugated π system in alkaloid molecule for iodine monochloride when charge-transfer complexes are formed, which may block the formation of pre-reactive π-complex intermediate, and thus suppress the electrophilic substitution.

这一方法标记过程简便,标记产富集于有机相,易于进一步纯化,其放射化学纯度接近95%,标记率超过70%;ICl与α-别隐品碱的亲电碘化反应结果表明,生碱底或溶剂分子中的N、O等n电子给体可能与亲电试剂形成电荷转移络合,竞争芳香亲电取代反应π络合反应前体的形成,从而抑制碘化反应的发生。

PubMed abstract: A psychological space is established for any set of stimuli by determining metric distances between the stimuli such that the probability that a response learned to any stimulus will generalize to any other is an invariant monotonic function of the distance between them.

PubMed摘要∶对于任何一组刺激的心理学空间的建立,是透过确定刺激之间的刻度距离,如此,对于任何刺激之反应而习得的可能性,是一种能够被普遍应用到其他任何对象之间距离上,单一不变的功能。

This article considers repeated mortgage means that a mortgager establishes the mortgage to two or more rights of claim within the same range of value for the same property.

在众多的担保形式中,抵押担保在实现对债权的担保功能的同时,的价值的利用和的经济效用的发挥也不会因担保利益的设定而受到重大的影响,这无论对于债权人还是债务人或担保的所有人以及社会经济的发展,均具有积极意义。

In order to compare the homology of the gene encoding VP2 between MDPV-Q and MDPV which was registered in the GenBank, also in order to find out changes of the VP2 gene and the immuno-genicity between the wild-strain MDPV-Q and the attenuated strain MDPV-26 which derived by continued passage of virulent wild-type in muscovy duck embryo, a pair of primer (LHMP7/LHMP8) was designed. The upper one LHMP7 and the lower one LHMP8 corresponded to the MDPV-specific nucleotides sequence 2885-2900 and 4618-4604 respectively, according to the MDPV nucleotide sequence databases. The length of the sequence embraced by the primers was 1734bp.

为了获取这一基因片段与国外分离株进行同源性比较,同时也为了了解MDPV强、弱毒株VP2基因之间的异同关系,及其免疫原性的变化规律,通过DNA重组技术,设计了一对引LHMP7/LHMP8,该对引选取位于2885~2900及4618~4604的两段序列,跨幅为1734bp,并在这两条引中分别加入两种限制性核酸内切酶SacⅡ和KpnⅠ的酶切位点,分别对MDPV-Q和由该株病毒经人工致弱后得到的MDPV-26株进行PCR扩增,并将PCR产克隆到pMD18-T载体上,分别得到二个重组子:pMD18-T—M-Q VP2和pMD18-T-M-26 VP2。

Numerous impermeable underground structures exist in urban seepage field. Since the corner of the structure is singular point and the dimension of the structure is negligibly small compared with the whole urban seepage field, it is difficult to model seepage field in urban area with existing methods.

城区渗流场中地下阻水结构众多,由于结构角点为奇异点,而且结构的尺寸跟整个渗流场的尺寸相比起来非常小,这导致现有的计算方法难以对城区渗流场进行模拟分析。

Two classes of specific binding sites in the polymer matrix were investigated by Scatchard analysis, which indicated that two kinds of complexes between functional monomers and templates were formed before the polymerization process. Comparing with the structure of TNT and acrylamide, one kind of complex between TNT and acrylamide was strongly charge-transfer complexing interaction by p-πcomplex between electron-rich amino group of acrylamide and electron-deficiecy-benzene ring of TNT, the other was hydrogen bonding interaction between amino group (-NH_2) of acrylamide molecule nitro group (-NO_2) of TNT.

Scatchard分析结果表明,在TNT印记聚合微球中存在两类结合位点,这表明在聚合反应之前,TNT与功能单体丙烯酰胺分子之间存在两种不同类型的作用力而自组装成两类的模板分子-功能单体复合,一类可能是由于富电子的丙烯酰胺和缺电子的TNT的苯环通过p-π配键而形成的电荷转移复合,另一类可能是由于丙烯酰胺的胺基与TNT的硝基之间的氢键作用而形成的复合

The biological activities of the metal complexes of derivatives of benzaldehyde nitrogen mustard were investigated against 〓,〓 and SMMC-7721 cell lines. The interesting results were found. When the non-activity ligand combines with cobalt and nickel , the complexes have good antitumor activity, while active ligand binds to the metal, the complex has no activity, indicating there are synergic effect and counteraction between the metals and the ligands.

对所获得苯甲醛氮芥衍生的金属配合进行研究,观察它们对SMMC-7721、〓细胞株的作用,发现某些有趣的实验结果,无活性的配体,当与钴,镍形成配合后,具有很好的抗肿瘤活性,而有活性的配体形成配合后无活性,揭示在它们存在有协同作用及拮抗作用。

The Molar conductivity indicates that all the complexes are nonelectrolyte. IR spectra show the ligand is bonded with RE ion through its oxygen atom in hydroxyl group of phenol; NO3 is coordinated as a symmetrical chelating bidentate group; the coordinated atoms of DMF and DMSO are the oxygen atoms in carbonyl and sulfoxyl groups. Fluorescence spectrum suggests that the Tb3+complexes have characteristic luminescence and its fluorescence intensity is enhanced after doping with La3+, Gd3+, Y3+, influence of doping ions and neutral ligands have also been discussed.

摩尔电导率表明,所有配合均为非电解质;红外光谱及核磁共振氢谱表明,对叔丁基杯[8]芳烃通过酚羟基的氧原子与稀土离子配位;硝酸根为双齿螯合配位;DMF和DMSO则分别通过羰基氧和亚砜基氧与稀土离子配位;配合的荧光光谱表明,所有Tb的配合具有较强的特征荧光,掺杂La~(3+)、Gd~(3+)、Y~(3+)离子对Tb~(3+)的荧光有较强的增强作用。

The influence of nonmetal inclusions on quality and performance of steels is not only dependent on total quantity of inclusions, but also on the type, shape, size, deforming behavior and distribution of the inclusions in steel.

钢中的非金属夹杂对钢质量和性能的影响,不仅取决于夹杂数量的多少,而且与夹杂的类型、形状、大小、变形行为和分布情况有着密切的关系。

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Finally, according to market conditions and market products this article paper analyzes the trends in the development of camera technology, and designs a color night vision camera.

最后根据市场情况和市面上产品的情况分析了摄像机技术的发展趋势,并设计了一款彩色夜视摄像机。

Only person height weeds and the fierce looks stone idles were there.

只有半人深的荒草和龇牙咧嘴的神像。

This dramatic range, steeper than the Himalayas, is the upturned rim of the eastern edge of Tibet, a plateau that has risen to 5 km in response to the slow but un stoppable collision of India with Asia that began about 55 million years ago and which continues unabated today.

这一引人注目的地域范围,比喜马拉雅山更加陡峭,是处于西藏东部边缘的朝上翻的边框地带。响应启始于约5500万年前的、缓慢的但却不可阻挡的印度与亚洲地壳板块碰撞,高原已上升至五千米,这种碰撞持续至今,毫无衰退。