查询词典 ether

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。

Restriction on the Use of Hazardous Substances bans new electronics containing more than agreed-to levels of lead, cadmium, mercury, hexavalent chromium, and polybrominated biphenyl as well as polybrominated diphenyl ether flame retardants.

在关于有毒物质使用的欧洲联邦法律限制新型电子设备中含有超标的铅、镉、汞、六价铬和多溴化联苯、多溴化二苯醚阻燃剂。

A New type of benzoxzine precursors was systhesized based on methoxy methylene diphenyl ether oligomer.The struture of product was characterized by IR and H-NMR analysis and effects of solvent polarity,temperature on the precursor composition were investigated.

以甲氧基次甲基二苯醚低聚物为基础合成了苯并口恶嗪预聚物，用H－NMR、IR表征了该预聚物的结构，讨论了反应温度、溶剂的极性等因素对合成预聚物的结构和组成的影响。

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。

In this paper, serum thyroid hormones level of the adult rats exposed to decabrominated diphenyl ether（BDE-209） at different doses was determined and the influence of BDE-209 to thyroid hormones was studied preliminarily. The dose dependent relationships between THs and BDE-209 concentrations were studied.

论文建立了十溴联苯醚（BDE-209）暴露剂量的成年大鼠模型，测定了不同暴露剂量的实验动物血清甲状腺激素（Thyroid hormones，THs）水平，初步研究了PBDEs污染物对生物体甲状腺激素的影响。

A water molecular gel can be formed by the aggregation and self- assembly of gelator 4,4-bissteaiylarnide diphenyl ether at very low concentration. The microcosmic morphology, thin fiber-like structure, was observed from atomic force microscope and TEM of the gels.

通过原子力显微镜以及透射电子显微镜对水分子凝胶的微观形态进行了表征，表明凝胶因子可以在水中聚集、自组装成延伸的螺旋缠绕细纤维结构，并且得出了纤维束的平均直径在100nm左右，平均孔径在100nm左右。

Keywords polychlorinated diphenyl ether;density functional theory;position of Cl atom substitu-tion;structural parameter;thermodynamic property;relative stability

多氯联苯醚；密度泛函理论；氯原子取代位置；结构参数；热力学性质；相对稳定性

Dissolve 50.0g of polyethylene glycol in 75ml of diphenyl ether, previously warmed, if necessary, just to melt the crystals, in a 250ml distilling flask.

你的理解好像是必要时加入聚乙二醇和二苯醚后一起加热，而我的理解是必要时加入聚乙醇后用预先加热的二苯醚溶解。

No ether drift was observed.

没有观察到以太冲洗。

In calculation with this model, epoxide value of diglycidyl ether of 1,2-cyclohexandiol could be predicted,which depended on mole ratio of 1,2-cyclohexandiol, epichlorohydrin and catalyst.

利用该模型可以从原料CHD，ECH和三氟化硼-乙醚的配比预测产物的环氧值。

Miss Grant:Well,our lesson is interesting,too.

格兰特小姐：那么，我们的课也有趣。

It is designed to be a modern and ecotypic and multi-functional industrial zone with suitable for both living and manufacturing.

工业区将被建成&一区多园多点&，功能齐全，生产、生活、生态同步发展的现代化、生态型、园林式工业城市新区。