乙酰基

With regard to the biological activities of paeonol and sodium paeonol sulfonate, we studied their inhibitory effects on phytopathogen and their activities of scavenging O2-and OH.

实验结果显示，丹皮酚磺酸钠的纯度为99.4804％，化学结构为2-甲氧基-4羟基-5-乙酰基苯磺酸钠。

Ten kinds of metal and three kinds of organic templates, including ethylenediamine, 1,4-butylenediamine and pyrazine were used in the synthesis of metal phosphonate coordination polymers.

在所合成的16种金属有机膦酸盐配位聚合物中，有机配体为2-羟基乙酰基膦酸，用于配位的金属离子共10种，模板剂3种分别为乙二胺(en，1，4-丁二胺，哌嗪。

It's soil, however, after its problems, the crop was phytotoxicity very concern, according to chlorine sulfonylurea herbicide easily after long after stubbly maize produced in the problem, residual phytotoxicity chose herbicides security agents Ⅰ compounds, N - methylene chloride acetyl groups - 5-2 - diethyl - propyl arene pbo.

它的土壤残留问题及其对后茬作物的药害影响，一直是人们极为关注的问题，故本文针对除草剂氯磺隆使用后易对后茬玉米产生残留药害的问题，选择了除草剂安全剂化合物Ⅰ：N-二氯乙酰基-5-乙基-2-丙基-1，3-恶唑烷。

To provide a non-toxic, zero-residue and effective approach to prevent the parasitical Ascaris suum, the effect of kaempferol-3-a-L-(4-O-acetyl)-rhamnose-7-a-L-rhamnoside,extracted from Cyrtomium yunnanense, on the the animals infected with A. suum was studied.

为猪蛔虫病的防治提供无毒、无残留，对人体无害的高效防治方法，利用云南贯众分离得到的化合物山奈酚－3-a-L-（4-O-乙酰基）鼠李糖基－7-a-L-鼠李糖苷作为试验用药，对感染猪蛔虫的动物进行了药效试验研究。

Subsequently,enol methylation of P in basic condition completed the synthesis of malyngamide O.Applied this route to the synthesis of malyngamides Q and R,the chiral unsaturated acid was connected with the vinyl chloride part by amidation,then the resulting product was converted into the corresponding aldehyde,followed by aldol condensation of the aldehyde with the chlorotitanium enolate of pyrrolidone to complete the skeleton of malyngamides Q and R,then the synthesis of them was completed via enol methylation in acid condition.

该合成路线拓展应用到malyngamides Q和R的合成时，首先用酰胺键将手性不饱和脂肪酸和烯氯片段连接，再转化成相应的醛，与乙酰基吡咯酮进行TiCl_4催化的aldol反应即得到malyngamides Q和R的骨架结构，再经过酸催化的烯醇甲基化反应完成了Q和R的全合成。

When methoxyethanol was used as the solvent,tantalum ethoxide can be chemically modified with acetic acid to producetantalum alkxo-acylate precursor, and therefore the hydrolysis of 〓can be slowed down.

在以乙二醇单甲醚为溶剂时，乙醇钽与醋酸作用生成乙醇钽的乙酰基配位化合物，可以减弱水解反应的进行。

Experiments show the maximum absorption wavelength of 1,1 diactyl ferrocene and 1,1 DiN, N glucosan...

测定了 1 ，1 -二乙酰基二茂铁、葡胺糖丙酰二茂铁的最大吸收波长，分别是 45 6nm和 346nm。

Taking the method of the indoor bioassay to study the herbicide antidote dichloro-N-acetyl-2-methyl-1-oxa-4-aza-Lo\nonane to reduce herbicide acetochlor on the stubble after the rice crop residues injury.

采用室内生物活性测定的方法，研究了除草剂解毒剂N-二氯乙酰基－2-甲基－1-氧杂－4-氮杂－螺[4.4]壬烷减轻除草剂乙草胺对后茬作物水稻的残留药害。

These salts can beprepared on treatment of phosphinimines with trifluoroaceticanhydride. After addition-elimination, triflromethylated β-enaminoesters and β-iminoesters were synthesized by thereaction of the above salts with organozinc reagents.

通过膦亚胺和三氟乙酸酐反应制备了N-三氟乙酰基氨基膦盐，该膦盐和锌试剂发生加成-消除反应后，合成了含有三氟甲基的β-烯胺酯和β-亚胺酯。

The results show that the two free secondary amines of TAIW are nitrated firstly and then the four acetyl groups of TAIW are nitrolysed one after one under conditions of elevating the reaction temperature.

试验结果表明：TAIW笼底的两个游离仲胺基很容易首先发生硝化作用，在升温条件下，四个乙酰基再逐个发生硝解。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。