硼氫化的 的英文怎麼說
中文拼音 [péngqīnghuàde]
硼氫化的
英文
hydroborated-
Borohydride which supported by strongly basic ion exchange resin reduced phseseph giving polymer - supported phenylselenide anion. it reacted with, - unsaturated aldehyde or epoxide to produce corresponding selenide. respective conditions were studied also
強堿型離子交換樹脂支載的四氫化硼與二苯聯硒反應,得到載體化的苯硒陰離子試劑,它與, -不飽和醛及環氧化物反應,生成相應的硒醚.對各自的反應條件也進行了探討Mgb2 can be cooled by liquid hydrogen or liquid neon or by fairly cheap, closed - cycle refrigerators that can readily reach below 20 k
硼化鎂可以藉由液態氫、液態氖或是相當便宜的封閉循環式冷凍機,輕易降溫至20k以下。Using magnesium hydride as a destabilizer for lithium borohydride, for instance, lowers the release temperature from 400 to 275 degrees c
舉例來說,以氫化鎂當做硼氫化鋰的去穩定劑,可以將釋放氣體所需的溫度從400降到275 。In recent years researchers have achieved better performance with compounds such as lithium borohydride, in which the metal atoms form weaker, ionic bonds with groups containing several hydrogen atoms
近年來,研究人員已經製作出效能更佳的復合物,例如硼氫化鋰,在這種金屬氫化物中,金屬原子與氫原子團(由數個氫原子組成)之間,是以較弱的離子鍵鍵結。In 2005, 61 physical and chemical parameters were measured and analysed in sediments. these included particle size, electrochemical potential as highly anoxic sediment with negative potential is related to organic pollution, chemical oxygen demand which indicates organic pollutants, total sulphide inorganic constituents, source of the unpleasant - smelling gas hydrogen sulphide, 15 metals and metalloids aluminium, arsenic, barium, boron, cadmium, chromium, copper, iron, lead, manganese, mercury, nickel, silver, vanadium and zinc, and trace toxic organics pahs and pcbs - 16 compounds and 18 congeners respectively
2005年,沉積物監測包括分析61種物理及化學參數,其中有粒子大小電化學勢有機污染促使沉積物缺氧,而讓電化學勢呈負數值化學需氧量顯示有機污染程度總硫化物無機物,是造成難聞氣體硫化氫的主因15種金屬及準金屬鋁砷鋇硼鎘鉻銅鐵鉛錳汞鎳銀釩及鋅和痕量毒性有機物多環芳烴及多氯聯苯分別為16種復合物及18種同質物。Surface modified au nanoparticles have been synthesized based on the reduction of hydrogen tetrachloroaurate ( haucl4 ) by sodium borohydride ( nabh ^ in methanol
通過硼氫化鈉nabh _ 4還原氫金氯四haucl _ 4 ,成功地製作了羧酸酯表面修飾的金納米粒子。The mo catalyst and the co catalyst prepared by impregnation reduction did not have zero - valent metals, the catalysts were not able to resist corrosion
以硼氫化納( nabh4 )為還原劑的浸漬還原法制備的mo 、 co催化劑並不能得到單質的金屬,而且抗腐蝕性能不好。Sodium metaborate is a by - product from deoxidation of sodium borohydride
摘要偏硼酸鈉是硼氫化鈉的還原副產物。Water quality - determination of trace amounts of arsenic - spectrophotometric method with silver salt
水質痕量砷的測定硼氫化鉀-硝酸銀分光光度法Soil quality - determination of total arsenic - spectrophotometric method with potassium borohyride and silver nitrate
土壤質量總砷的測定硼氫化鉀-硝酸銀分光光度法The determination of micro arsenic by reduced molyboloarsenate speclrophotometry after seperation by sodium borohydride
硼氫化鈉還原鉬藍吸光光度法測定微量砷的研究If the nabh4 addition amount was more, a double peak absorbance signal was obtained and the peak high was redaced
當硼氫化鈉加入量較大時,所得的信號存在雙峰,而且其峰高降低了很多。The asymmetric reduction mechanism of p - methylcyclohexanone by sodium borohydride was investigated with ab initio calculations
用從頭計算方法對硼氫化鈉不對稱還原對甲基環己酮的機理進行了研究。The isopropyl amine is used as extractive and purifying agent to give the final sodium borohydride with high purity and yield of 47. 8 %
用異丙胺對產物進行萃取提純,制得了純度較高、收率為47 . 8 %的硼氫化鈉產品。Reaction mechanism of hydroboration
硼氫化反應機理的研究The borohydride reducing reagent supported by the strong acid cation exchange resin was prepared by the strong acid cation exchange resin reacting with sodium borohydride. the reductive ability of the resin reducing the carbonyl compounds is strong, so the yields are generally pretty high ( 51 % ?
用強酸型離子交換樹脂與硼氫化鈉作用制備了強酸型離子交換樹脂支載的硼氫化還原劑.探討了在不同溶劑中制備的還原樹脂的還原能力;應用於還原羰基化合物時有良好的產率( 51 % ?Plasma enhanced chemical vapour technique ( hf - pecvd ) on monocrystalline silicon and quartz glass substrates under the low temperature. the effects of ultrasonic pre - treating of substrates, temperature, r. f
系統地研究了襯底的超聲預處理工藝、沉積溫度、射頻功率以及氫氣對氮化硼薄膜的生長、組成及表面形貌結構的影響。The progress in synthesis of chiral phosphinamine ligands is reviewed. their applications in asymmetric allylic substitution, asymmetric 1, 4 - conjugate addition and asymmetric hydroboration are described
本文較為詳細地綜述了軸向手性膦氮配體合成及其在不對稱烯丙基取代反應、不對稱1 , 4 -共軛加成反應及不對稱硼氫化反應中的應用。In order to prepare high quality films, appropriate temperature and r. f. power should be selected, and moreover, the content of the hydrogen need be controlled
因此制備薄膜與襯底結合良好、較高質量的氮化硼薄膜,應在適當的沉積溫度( 420 )和射頻功率( 160w )下並適當控制反應氣體中氫氣的含量。分享友人