戊基的

Their diasteroisomers were achieved because the group of alkoxy assaulted C_1 of 2-deoxyribofuranosyl chloride from different directions.

因烷氧基可从呋喃脱氧糖环的不同方向进攻1-位碳原子，因而所得到的烷基呋喃脱氧戊糖苷是一对非对映异构体。

The glutaraldehyde was coupled with amido group of chitosan, and template protein-bovine hemoglobin was immobilized by aldehyde group.

用壳聚糖包裹的硅胶为载体，利用壳聚糖表面的氨基与戊二醛结合，在硅胶表面引入醛基，固定模板蛋白。

To enable the fabrication of a thermally stable ultralow dielectric constant film, specific precursor materials are used, such as, silane derivatives, for instance, diethoxymethylsilane and organic molecules, for instance, bicycloheptadiene and cyclopentene oxide.

为了制造热稳定的超低介电常数膜，使用特殊的前体材料，如硅烷衍生物例如二乙氧基甲基硅烷和有机分子例如双环庚二烯和环戊烯氧化物。

In order to carry out the separation of the azeotropic mixture dipropyl ether + 1-propyl alcohol by extractive distillation, we are studied the influence on the phase equilibria behavior four different solvent: 1-pentanol [2], butyl propionate [3], N,Ndimethylformamide [4] and 2-ethoxyethanol.

为了用萃取性蒸馏法分离二丙醚和1－丙醇组成的共沸混合物，我们正在研究4种不同溶剂对相平衡行为的影响：1-戊醇[2]、丙酸丁酯[3]、N，N－二甲基甲酰胺[4]和2-乙氧基乙醇。

The sodium dithiobenzoic acid was oxidized with potassium ferricyanide to obtain di disulfide.The influences of raw materials mole ratio,stirring method and reaction time on the yield were studied with orthogonal test.

用铁氰化钾溶液氧化二硫代苯甲酸钠，得双二硫代苯甲酰，采用正交实验探讨了4，4'-偶氮双(4-氰基戊酸)与双二硫代苯甲酰反应的投料比、搅拌方式、反应时间对反应收率的影响。

The protic- or Lewis acid catalyzed ring-closure of divinyl ketones (and their acid-labile precursors) pentadienylic cations is known as the via Nazarov cyclization.

质子酸或路易斯酸通过戊二烯基阳离子催化二乙烯酮的环闭合（以及它们的酸不稳定前体）这个反应被称为Nazarov环化。

In this regard, our goal is to develop a glow-discharge method to functionalize titanium surfaces by the covalent immobilization of bioactive organic molecules.

钛金属圆片先以氩气电浆去除表面污染物，来产生可重复取得的清洁表面，接著用丙烯胺电浆处理，使丙烯胺聚合在钛金属表面，再以交链剂戊二醛将白蛋白与丙烯胺的胺基(-NH2)键结。

Diels-Alder reaction between β-myrcene and maleic anhydride catalyzed by SO(superscript 2- subscript 4)/TiO2-ZrO2 solid superacid was investigated.

研究了SO(上标 2-下标 4)/TiO2-ZrO2型固体超强酸催化剂的制备及其催化β-月桂烯与马来酸酐的Diels-Alder反应，通过GC、GC-MS和红外分析，确定其主产物为4-（4-甲基－3-戊烯基）－4-环己烯-1，2-酸酐。

Synthesis and Structural Analysis of New Monoterpene Derivatives from β-myrcene ;2. Diels-Alder reaction between β-myrcene and maleic anhydride catalyzed by SO2-4/TiO2-ZrO2 solid superacid was investigated.

研究了SO42-/TiO2-ZrO2型固体超强酸催化剂的制备及其催化β-月桂烯与马来酸酐的Diels-Alder反应，通过GC、GC-MS和红外分析，确定其主产物为4-(4-甲基-3-戊烯基)-4-环己烯-1，2-酸酐。

Objective A multiresidue method based on solid-phase extraction andgas chromatography with electron capture detector was developed for thesimultaneous determination of 15 pesticides (Dichlorvos, Dimethoate,Parathion-methyl, Malathion, Parathion, Fenpropathrin, Lambda-cyhalothrin,Cypermethrin,Esfenvalerate,Deltamethfin,Quintozene,Dieldrin,Heptachlor,α-Endosulfan,β-Endosulfan) in drinking water.

目的：建立同时检测饮用水中15种农药残留的固相萃取-气相色谱分析方法，所检测的农药包括5种有机磷：敌敌畏，乐果，甲基对硫磷，马拉硫磷，对硫磷；5种有机氯：五氯硝基苯，狄氏剂，环氧七氯，α-硫丹，β-硫丹；5种拟除虫菊酯：甲氰菊酯，三氟氯氰菊酯，氯氰菊酯，氰戊菊酯，溴氰菊酯。

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％。