醚的

Methods The methods of DPPH , pyrograllol auto-oxidation and salicylicl acid were used in order to get the scavenging quality of DPPH free radical , superoxide free radical O2-.

方法采用DPPH法、邻苯三酚自氧化法、水杨酸法，分别测定缬草醚酯提取物清除DPPH自由基、超氧阴离子自由基和羟自由基的能力。

The prepared pentabromo benzyl bromide may be applied in preparing high efficiency fire retardant.

制备的五溴苄基溴可用于制备五溴苄基丙烯酸酯或烷基醚类聚合物用高效阻燃剂。

The p-tolyl benzyl ether was synthesized by reaction of p-cresol and benzyl chloride in 95% ethanol as solvent and under microwave irradiation.

以95%的乙醇为溶剂，以氯化苄和对甲苯酚为原料利用微波辐射加热合成对甲苯基苄基醚。

Soluble comb-shaped polyether phosphate type polymer LPEP was obtained by polymerizing the phosphate macromolecular monomers with long side chain, which was prepared by reacting polyethylene glycol mono methyl ether and other compound with phosphoryl oxychloride.

来源：ABCd7论文网www.abclunwen.com对分子结构和合成工艺进一步改进，采用聚乙二醇单甲醚等与三氯氧磷反应合成了长链型磷酸酯大分子单体，聚合得到可溶性的梳状聚醚磷酸酯型聚合物LPEP。

Comb-shaped polycarboxylic -type superplasticizers were synthesized with acrylic acid,mathacrylic acid,sodium allylsulphonateand methoxypolymethacrylatethrough aqueous copolymerization initiated by ammonium persulfate.

将甲氧基聚氧乙烯醚单甲基丙烯酸酯、丙烯酸、甲基丙烯酸和烯丙基磺酸钠进行水溶液共聚，合成了具有梳型结构的聚羧酸系高效减水剂。

RoHS Directive stipulates that from July 1, 2006, All member states should invest in the market to ensure that the restrictions on the use of electronic and electrical equipment, lead, mercury, cadmium, hexavalent chromium, polybrominated diphenyl ether and polybrominated biphenyls and other hazardous substances.

RoHS 指令规定，从2006年7月1日起，各成员国应确保在投放于市场的电子和电气设备中限制使用铅、汞、镉、六价铬、多溴二苯醚和多溴联苯等有害物质。

Isoprene rubber was prepared with titanium catalyst modified by diphenyl ether ,and the effects of addition orders of various catalytic component on the monomer conversion,gel content and relative molecular mass were discussed in detail.

用二苯醚改性钛系催化剂合成了异戊橡胶，讨论了催化剂各组分加料顺序对单体转化率、产物凝胶含量和相对分子质量的影响。

Alkyl diphenyl ether sodium disulfonateis a kind of multifunctional anionic surfactants with double hydrophilic groups.

烷基二苯醚双磺酸钠是一类当前备受瞩目的新型多功能双亲水基型阴离子表面活性剂。

These directives limit the use of six hazardous materials in the manufacture of electronic and electrical equipment: lead, mercury, cadmium, hexavalent chromium (chromium VI or Cr6+), polybrominated biphenyls, and polybrominated diphenyl ether.

这些标准限制了6种有毒材料在电子电气设备生产中的应用：铅，汞，镉，六价铬(chromium VI 或 Cr6+)，多溴联苯，多溴联苯醚等。

The current knowledge concerning effects of polybrominated diphenyl ether on benthic aquatic organisms is still very limited although they have been widely used as fire retardant additives for 3 decades.

多溴联苯醚(polybrominated diphenyl ether，PBDEs)为溴化阻燃剂的一种，近30年来已被广泛地运用，但目前仍少有研究探讨其对水生底栖生物之毒性影响。

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。