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Polyfluoroalkyl iodides could react with unsaturated olefin acids in the presence of sodium dithionite by radical addition to give adducts. It was found that these adducts could form polyfluoroalkyl substituted γ or δ-lactones due to intramolecular nucleophilic substitution in the alkali solution.

研究发现:多氟烷基碘化物在连二亚硫酸钠存在下与不饱和烯酸经自由基加成得到的产物,能在碱性条件下进行分子内亲核取代反应形成五元或六元环的含氟内酯类化合物。

Two isologous red crystals of the title compound, prepared in two methods from the reaction of Cut and 4,4'-bipyridine (4,4'-bipy) in solution, were structurally characterized with monoclinic C2/c (1) and tetragonal I4(subscript 1)/acd (2) space groups.

碘化亚铜和4,4'-二联吡啶在溶液中反应的二种方法可制备出标题化合物的2个不同红色晶体,结构表征出两种晶体分别是单斜C2/c(1)和四方I4(下标 1)/acd(2)空间群。

Two isologous red crystals of the title compound, prepared in two methods from the reaction of CuI and 4,4′-bipyridine (4,4′-bipy) in solution, were structurally characterized with monoclinic C2/c (1) and tetragonal I41/acd (2) space groups.

碘化亚铜和4,4′-二联吡啶在溶液中反应的二种方法可制备出标题化合物的2个不同红色晶体,结构表征出两种晶体分别是单斜C2/c(1)和四方I41/acd(2)空间群。

The optimal technical conditions of the later were that cuprous chloride and 1,10-phenanthroline were used as catalyzer, the molar proportion of catalyzer and 4,4′-diiodobiphenyl was 0.15:1, and the reaction mixture was refluxed for 7h in the solvent of xylene at 150℃.

后者的适宜工艺条件为以二甲苯作溶剂,氯化亚铜和邻菲咯啉为催化剂,催化剂与4,4′-二碘联苯的摩尔比为0.15∶1,在150℃下回流反应7h。

Objective To confirm the normal value of the adult's thyroidal rate of iodine uptake after universal iodine salt in JiaoZuo.

甲状腺吸碘率在甲状腺疾病如亚急性甲状腺炎、自身免疫性甲状腺炎、格雷氏甲亢、单纯性甲状腺肿等疾病的诊断和鉴别诊断中有很大价值。

The results show that the crude fat in corn bran is 5.99%, the protein is 4.86%, the crude fiber is 12.45%. The physico-chemical indexes of corn bran oil are as following: d(superscript 20℃ subscript 4℃) 0.9135, IV 112.4gI/l00g, SV 189.1mgKOH/g, unsaponifiable matters 3.75%. The fatty acid composition of corn bran oil is: oleic acid 30.27%, linoleic acid 54.14%, palmic acid 13.68%, stearic acid 1.14%.

结果表明,玉米皮粗脂肪含量为5.99%,粗蛋白质4.86%,粗纤维含量为12.45%;玉米皮油的相对密度0.9135,皂化值189.1mgKOH/g,碘值112.4gI/100g,不皂化物3.75%;玉米皮油脂肪酸组成中,油酸30.27%,亚油酸54.14%,棕榈酸13.68%,硬脂酸1.14%。

The SmI2-mediated reductions of ketones,imines and α,β-unsaturated esters have been shown to be instantaneous in the presence of H2O,an amine and in THF.

在水、胺以及四氢呋喃存在下二碘化钐参与的还原酮、亚胺以及α,β不饱和酯的反应能够在瞬间完成。

The iodine sorption value and methylene blue sorption value are over the national high quality standard.

碘吸附值和亚甲基蓝吸附值超过了国家优级品的标准。

Results show that the yield and iodine value of AC-MnO are lowered by 28.9% and 12.4% respectively compared to AC.

结果表明:AC-Mn的收率和碘值分别比AC降低了28.9%和12.4%,但亚甲兰吸附值提高了19.8%。

The iodine adsorption value and methylene blue adsorption value of the AC were 1435 and 495mg/g, respectively.

活性炭对的碘吸附仇为1435mg/g,亚甲基蓝吸附值为495mg/g,产率为49%。

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