查询词典 moieties

Over the past four decades, many dearomatization reactions have developed and applied for synthesis of alicyclic compounds con-taining six–membered carboncyclic moieties.

芳香族化合物稳定、易得，通过芳香族化合物的脱芳构化反应，制备官能化的脂肪六元碳环化合物，早以引起人们的广泛兴趣。

Novel chitosan derivative with long alky groups as the hydrophobic moieties and carboxymethyl groups as the hydrophilic moieties was synthesized. The chemical structure of N-octyl-O, N-carboxymethyl chitosan was characterized via FTIR, 1H NMR and elemental analysis. The physical properties were analyzed with wide angle X-ray diffraction and differential scanning calorimetry.

以天然可生物降解的壳聚糖为原料，通过在壳聚糖6位羟基上引入羧甲基，在2位氨基上引入疏水烷基链，制得N-辛基－O，N-羧甲基壳聚糖两亲性衍生物，分别用FTIR、1H NMR和元素分析等技术对其结构进行表征，用广角X射线衍射和差示扫描量热法对具物理性质进行分析，并考察其在各种溶剂中的溶解性能及其对难溶性药物的增溶能力。

Hyaluronic acid is a linear polysaccharide chain composed of alternating β-1,4-glucuronic acid and β-1,3-N-acetylglucosamine moieties.

透明质酸（Hyaluronan， HA）是由葡萄糖醛酸和N-乙酰氨基葡萄糖为双糖单位交替连接而成的粘多糖物质。

The process of the removal of a apolar molecule or the hydrophobic moieties from water can be considered as two steps: One is the destructuring of the water in the vicinity of the surface of the solute molecules, and the other is the cavity holding the hydrocarbon molecule collapses.

非极性分子或极性分子的疏水部分从水中逸出的过程可视为由两部分组成：一是非极性分子周围的水分子的有序排列结构被破坏；二是水中容纳非极性分子的空穴倒坍。

Summarizing the results from this analysis, it was revealed that the analytic contained abundant components of neolignans , having dimeric phenyl propanoid structure with unsymmetrically condensed benzofuran skeleton attached with different sugar moieties.

结果显示此部分为富含木质素类化合物，所分析出的化合物多为首次在该植物发现，其中有massonianoside D(1)、7、8和C-veratroylglycol (9)为已知化合物，而2~6、10~14是新颖天然物成分。

A novel monomer the 1-methyl-4,5-bis(4-chlorobenzoy) cyclometer containing cyclohexene were prepared,so a group of novel polys containing the cyclohexene and phthalazinone moieties was prepared by the nucleophilic displacement reaction of 1-methyl-4,5-bis(4-chlorobenzoyl) cyclohexene and 4,4′-dichlorodiphenyl sulfone and 4-(3,5-dimethyl-4-hydroxyphenyl)-2,3-phthalazin-1-one.

用新型聚合单体1-甲基-4，5-二(4-氯代苯甲酰基)环己烯与4-(4-羟基苯基)-2，3-二氮杂萘-1-酮、4，4′-二氯二苯砜单体经亲核共缩聚反应，成功地合成了含环己烯结构的杂环联苯型聚醚系列聚合物。

In one embodiment, the invention is a system for initiating free radical polymerization comprising: a in one part, one or more amido-borate compounds containing one or more anionic amido-borate moieties comprising an organoborate wherein the boron atom is bonded to a nitrogen atom of ammonia or an organic compound containing one or more nitrogen atoms, such as a hydrocarbyl amine, a hydrocarbyl polyamine, or an aromatic heterocycle containing one or more nitrogen atoms and optionally containing one or more heteroatoms or heteroatom containing functional moieties, and one or more cationic counter ions and b in a second part, a liberating compound which reacts with the nitrogen atom bound to the boron atom upon contact with the amido-borate to form an organoborane radical.

在一个实施方案中，本发明是引发自由基聚合的体系，包括：a在一个部分中，一种或多种含有一个或多个包含有机硼酸根的阴离子酰氨基-硼酸盐部分和一个或多个阳离子抗衡离子的酰氨基-硼酸盐化合物，其中的硼原子键合到氨的氮原子或含一个或多个氮原子的有机化合物，例如烃基胺、烃基聚胺或含一个或多个氮原子和任选含一个或多个杂原子或含杂原子的官能部分的芳族杂环的氮原子上，和b在第二部分中，在与酰氨基-硼酸盐接触时与键合到硼原子上的氮原子反应形成有机硼烷基团的释放化合物。

In this organogel structure, the p–p stacking interactions among the HPB moieties, the hydrogen-bonding interactions between the urea moieties, and the van der Waals forces between the long alkyl chains cooperatively stabilized the aggregate structure; these are well-known interactions in gel systems.2a,5 Specifically to clarify the effect of the hydroxyl group in the HPB unit on gelation, we also designed and synthesized reference compound 2, which does not contain an adjacent hydroxyl group and thereby cannot induce its planar keto tautomer upon excitation.

在这个organogel结构、p-p叠加之间的相互作用在HPB根、实验之间的相互作用尿素根之间，范德华力长链烷基之间的合作稳定了合计结构；这些都是著名的交互作用的凝胶 systems.2a明确厘清，羟基的效果集团在HPB装置设计和凝胶，我们也是合成的化合物、参考不包含了邻近的羟基从而无法归纳其平面在keto tautomer激励。

The fundamental studies on structure sensitive functional materials will provide the necessary knowledge of developing novel functional materials by the way of understanding the relation ship between physical properties and the electronic and geometric structures of the compounds, and will result in the specialized functional moieties and them athematic rules which govern the behaviors of these moieties.

通过对结构敏感功能材料的研究，归纳和总结化合物的物理化学性质与原子的空间排列以及电子结构之间的内在规律，结合物理化学性能测试和理论计算，逐步推导出功能基元和数学关系式，以形成功能基元理论，为开发新型功能材料提供理论基础。

In thesecond chapter, eleven 1,3,4-oxadizoles bearing chiral pyrazolyl moieties(4a-k) andfive triazolotriazines bearing chiral pyrazolyl moieties(5a-e) were obtained from5-[(1"S)-1",2-diacetyl-oxyethyl]-1-phenylpyrazol-3-carboxaldehyde(1) with arylcar-bohydrazide or (5-aryl-1,2,4-triazin-3-yl)hydrazine through an intramolecular1,3-dipolar cycloaddition in the presence of the non-metal oxidant IBD.

其中第二章介绍了以D-葡萄糖为原料制得的5-[(1′S)-1′，2′-二乙酰氧基乙基]-1-苯基吡唑-3-醛(1)分别与芳基甲酰肼、(5-取代苯基-1，2，4-三嗪-3-基)肼反应，在无金属氧化剂—IBD引发下，发生分子内1，3-偶极环加成，采用&一锅煮&法合成了11种含手性吡唑基的1，3，4-噁二唑类化合物(4a-k)和5种含手性吡唑基的三唑并三嗪类化合物(5a-e)。

Fancy gold-plated dangling earrings with facetted White Opal crystals.

花式镀金悬垂耳环与facetted白欧泊水晶。

This essay chooses the study aim from biology teachers in middle school in Shi Jiazhuang which tells us that most of the middle school biology teachers in Shi Jiazhuang have the"burnout", lower successfulness, individualize.

本文选取石家庄市初中生物教师作为研究对象，运用问卷调查的方法对石家庄市初中生物教师职业倦怠的现状进行调查，调查结果发现，石家庄市初中生物教师这一群体普遍存在职业倦怠，情感枯竭程度偏高，成就感偏低，去个性化程度最为严重。