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  羟基
     Synthesis, Crystal Structure and Thermal Stability of Binuclear Copper Complex: [Cu(C_(14)H_8O_3)(C_9H_7N)(C_2H_5OH)]_2 with 9-hydroxy-fluorene-9-carboxylic Acid
     9-羟基-芴-9-羧酸双核铜配合物[Cu(C_(14)H_8O_3)(C_9H_7N)(C_2H_5OH)]_2的合成、晶体结构及热稳定性研究
短句来源
     SYNTHESIS AND CRYSTAL STRUCTURE OF THE BINUCLEATING MACROCYCLIC MONOHYDROXO-BRIDGED DICOPPER( Ⅱ) COMPLEX [Cu_2(OH)(C10_4)(C_(16)H_(38)N_6)](C10_4)_2·CHC1_3
     单羟基桥连的双铜(Ⅱ)大环穴醚配合物[Cu_2(OH)(ClO_4)(C_(16)H_(38)N_6)](ClO_4)_2·CHCl_3的合成和结构
短句来源
     The occupation coefficients of Ca~(2+) and Na~+ at M_4 crystallographic site and Fe~(2+) and Mg~(2+) at M_1,M_3 and‘M_2+M_4’in amphibole textures have been calculated individually according to the strength of the four spectral bands (i.e.A,B,C and D)of hydroxyl (OH).
     根据羟基(OH)A、B、C、D 四个谱带的强度,分别计算出角闪石结构中 M_1、M_3、[M_2+M_4]晶位上 Fe~(2+)和 Mg~(2+)以及 M_4晶位上 Ca~(2+)和 Na~+的占位系数。
短句来源
     Ab initio Investigation of the Rearrangement Between the Isomers of C_(36) Fullerene Derivative(C_(36)OH)~+──Intramolecular OH shift
     富勒烯衍生物(C_(36)OH)~+异构体间的相互转化机理──羟基(OH)的分子内迁移
短句来源
     Calibrated standard curve of its metabolite 5′ OH omeprazole in plasma is Y=-0 003 659+0 001 328X(r =0 9970), the recoveries of three concentrations 20, 200, 1 000 mg·L -1 are 79 42%, 96 49%, 95 04%, respectively;
     5′ 羟基奥美拉唑的校正标准曲线分别为Y =-0 0 0 36 5 9+0 0 0 132 8X (r =0 9970 ) ,其 2 0、2 0 0、10 0 0mg·L-13浓度的血样回收率分别为 79 4 2 %、 96 4 9%、95 0 4 % ;
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  oh自由基
     Theoretical Study on OH Radical Generation from the Reaction of Fe~(2+) and H_2O_2 in Gas Phase
     气相中Fe~(2+)和H_2O_2作用生成OH自由基的理论研究
短句来源
     Study of Intermolecular Interaction between H_2O and NO, CN, OH Radicals and Anions
     H_2O与NO,CN,OH自由基及负离子相互作用的CP研究
短句来源
     Theoretical Study of the Reaction Mechanism of CH_2Cl with OH
     CH_2Cl与OH自由基反应机理的理论研究
短句来源
     The reaction mechanism of CH_2Cl radical with OH radical to produce HCCl+H_2O, HCOCl+H_2 and H_2CO+HCl has been studied by using quantum chemistry ab initio calculations.
     用量子化学从头算方法对CH2 Cl与OH自由基反应生成HCCl+H2 O、HCOCl+H2 和H2 CO +HCl的机理进行了研究 .
短句来源
     The rotational distributions and kinetic study on OH(A~2Σ,ν=0,ν=1) produced in reaction of Ar(~3P_(0,2) ) with H_2O
     Ar(~3P_(0 ,2) )与H_2O传能反应生成OH自由基的机理和初生态转动分布
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  ∶oh
     (F_2~+)_H Center in Mixed Crystals of KCl-KBr∶OH~-
     KCl-KBr∶OH~-混合晶体中的(F_2~+)H心研究
短句来源
     Comparisons among Z11 - 16: OH and other three saturated alcohols, 14: OH, 16: OH, and 18: OH as well as structurally similar compound Z9- 16: OH indicated that Z11 - 16: OH was more effective in inhibiting male orientation behavior than other tested alcohols.
     将Z11-16∶OH与其他三种饱和醇14∶OH,16∶OH,18∶OH以及与结构上相似的Z9-16∶OH比较发现,Z11-16∶OH抑制雄蛾定向的行为最有效。
短句来源
     Addition of Z-11-hexadencen-ol (Z11-16∶OH) to combination of Z11-16∶Ald and (Z9-16∶Ald) induced significantly the male EAG response. Mixture 16∶Ald with Z11-16∶Ald and Z9-16∶Ald caused the greatest male EAG response.
     将Z11 16∶OH加入到Z11 16∶Ald和Z9 16∶Ald的混合物中明显抑制雄蛾的EAG反应,将16∶Ald加入两者混合物中引起最大的EAG反应.
短句来源
     The results show that the performances of emulsion is optimum when the mole ratio of NCO/OH is 2.5∶1 and the amount of DMPA is 5%.
     结果表明,当NCO∶OH(摩尔比)=2.5∶1,DMPA=5%时,乳液性能最佳。
短句来源
     Field application of Z11 - 16: OH decreased egg hatch rate from untreated 34 % t0 17 % by spraying or coating the alcohal on plastic tubes.
     田间施用Z11-16∶OH使其卵孵化率从处理前的34%降低到处理后的17%。
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  “oh”译为未确定词的双语例句
     Investigations on Increasing SO_2 Removal Efficiency from Flue Gas by OH, NH_2 Radicals in Pulsed Discharge Plasma Process
     OH,NH_2自由基提高脉冲放电等离子体烟气脱硫效率的研究
短句来源
     Ⅰ.The Antiapoptotic Effect and Its Mechanism of Glucocorticoids in Human Ovarian Cancer Cell HO-8910 Ⅱ.The Up-regulation of RhoB by Glucocorticoids and 1,25(OH)_2 D_3 in Human Osteosarcoma Cell Line HOS-8603 and Its Biological Significance
     1.糖皮质激素在人卵巢癌HO-8910细胞中抗凋亡作用及其机制的研究 2.糖皮质激素和1,25(OH)_2 D_3诱导人骨肉瘤HOS-8603细胞系RhoB的表达及其意义的研究
短句来源
     Studies on the Photosensitivity of Layered α-Ni(OH)_2 and Nickel Aluminum Layered Double Hydroxides
     层状α-Ni(OH)_2和镍铝水滑石的光敏性能研究
短句来源
     The Effects of 1, 25(OH)2D3 and Calcitonin on Cell Proliferation and OPG/RANKL/RANK Expression in Mouse Osteoblasts and Chondrocytes
     1,25(OH)_2VD_3、降钙素对小鼠成骨细胞和软骨细胞增殖及OPG/RANKL/RANK表达影响的实验研究
短句来源
     A NEW LITHIUM-BEARING MINERAL IN CHINA Balipholite BaMg2LiAl3 [Si2O6]2(OH8)
     我国发现的一种含锂新矿物——纤钡锂石 BaMg_2LiAl_3[Si_2O_6]_2(OH)_8
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  oh
These results suggest that dialkylamino and appropriately substituted benzene rings (NO2, 8; OH, 9) are bioisosteric replacements for pyrrolidine and pyridine, respectively.
      
By Mazur's Theorem, the existence of solutions of the optimal control problem (OH) is demonstrated.
      
The first order necessary conditions of optimality for problem (OH) is obtained by the conception of normal cone.
      
Finally, under suitable assumptions, the uniqueness of solutions of the optimal control problem (OH) is given.
      
Hydroxyl-term inated (HPAEK-OH) and fluoro-terminated (HPAEK-F) hyperbranched poly(aryl ether ketone)s were prepared by using different A2/B3 mass ratio.
      
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When ceric iodate is precipitated from acid solution by the addition of asoluble iodate,a gelatinous precipitate is obtained,which is difficult to filterand wash.The precipitate must be redissolved and reprecipitated as oxalatefor final ignition to ceric oxide.A method has been deviced to improve the form of the ceric iodateprecipitate by slow precipitation in homogeneous solution.Advantage is takenof the fact that cerium exists in two distinct valence states,the cerous and theceric.Cerous iodate is soluble...

When ceric iodate is precipitated from acid solution by the addition of asoluble iodate,a gelatinous precipitate is obtained,which is difficult to filterand wash.The precipitate must be redissolved and reprecipitated as oxalatefor final ignition to ceric oxide.A method has been deviced to improve the form of the ceric iodateprecipitate by slow precipitation in homogeneous solution.Advantage is takenof the fact that cerium exists in two distinct valence states,the cerous and theceric.Cerous iodate is soluble in dilute acid solution,while ceric iodate isinsoluble.Cerium is first reduced to the cerous state by hydrogen peroxide innitric acid solution.Ammonium iodate is added and no precipitation occurs atthis moment.The precipitation is brought about by the slow formation ofceric ion in the iodate solution by ammonium persulfate.Thus a denseprecipitate is formed slowly.This compact volume of the precipitate facilitatesfiltration and washing.The precipitate is ignited directly to ceric oxide,part of which is always stained with a brown color.This is remedied by evapora-tion of the ignited precipitate to dryness with a few drops of concentratedsulfuric acid and ignition to ceric oxide for final weighing.For samples containing 10-50 mg of ceric oxide,a total volume of 300-400 ml gives best results.The optimum concentration of the nitric acid presentis 0.4-0.5 N.A starting temperature of 40-60℃ favors the denseness of theprecipitate.Precipitation is continued at an elevated temperature(70-80℃ )on a hot plate.Stirring not only improves the crystallinity of the precipitateand may decrease the occlusion of impurities,but also shortens the time forcomplete precipitation.Dilute iodic acid solution(1-2%)is used as washsolution.This method is good for samples containing 2.5-250 mg of cericoxide.The composition of the precipitate is not reproducible.The precipitate is abasic iodate and the ratio of IO_3~-found/IO_3~- theoretical for Ce(IO_3)_4 increaseswith the concentration of the nitric acid present(up to 0.5 N)to a maximumvalue of about 0.92.The ratio never reaches unity.An analysis of the pre-cipitate dried at 40-45℃ for 2-3 days shows a fairly constant ratio of IO_3~- found/IO_3 theoretical for Ce(IO_3)_4 From the ratio of Ce:IO_3,an approximate formulaCe_2(IO_3)_7(OH)·XH_2O has been proposed for the precipitate obtained under theconditions described.The number of water molecules in the formula is in-definite,varying from 3 to 5.

1.在均匀溶液中沉淀的碘酸铈,性质紧密,便利于过滤和洗涤。烧灼成为氧化铈后,适合于作为铈的定量分析。2.利用碘酸亚铈能溶解于稀酸溶液而碘酸铈则不溶的区别,先用过氧化氢把全部铈离子还原,再加入碘酸铵,然后进行氧化,使碘酸铈在均匀溶液中沉淀出来。3.本方法适用于含氧化铈2.5—250毫克的样品。4.所得沉淀的分子式经初步测定为 C_(e2)(IO_3)_7(OH)·x H_2O,其中 x 的数值不定,涨落在3与5之间。

Mu-feng-chin has been used as a diuretic and dropsic, etc. in Chinese medicine for many years. Four substances have been isolated by the author from a sample of Mu-fong-chi brought in Shanghai, and the details of the isolation and chemical properties of two of them, viz. Mu-fong-chin A and B, have been reported in previous papers of this series elsewhere. The present paper deals with Mu-fong-chin C, which has the molecular formula C_(18)H_(21)O_(10) and a melting point 180-181℃. Mu-fong-chin C was shown to be...

Mu-feng-chin has been used as a diuretic and dropsic, etc. in Chinese medicine for many years. Four substances have been isolated by the author from a sample of Mu-fong-chi brought in Shanghai, and the details of the isolation and chemical properties of two of them, viz. Mu-fong-chin A and B, have been reported in previous papers of this series elsewhere. The present paper deals with Mu-fong-chin C, which has the molecular formula C_(18)H_(21)O_(10) and a melting point 180-181℃. Mu-fong-chin C was shown to be a phenolic substance, it probably contains phenolic OH, methylenedioxy, aldehyde and methoxy groups.

提去木防巳甲乙二素的母液以醚去油、脂、蠟及色素等後,母液濃縮,以熟戊醇及热水交互處理,分離得一種棕黄色結晶。融點180—181℃,定名為木防巳丙素。分子式為C_(18)H_(21)O_(10)。其分子中可能含有酚性羟基、甲二氧基、醛基及甲氧基等,其初步暫定構造式為

Aureomycin (Ⅰ) on reduction with zinc-acetic acid gives desdimethylaminoaureomycin (Ⅱ) under mild conditions and desdimethylaminodesoxyaureomycin (Ⅲ) under more drastic conditions. Ⅱ can be converted into Ⅲ by further reduction. Treatment of Ⅰ, Ⅱ or Ⅲ with concentrated hydrochloric acid or methanolic HCl produces anhydroaureomycin (Ⅳ), desdimethylaminoanhydroaureomycin (Ⅴ) or desdimethylaminodes- oxyanhydroaureomycin (Ⅵ) respectively. Compound (Ⅴ) can be obtained from Ⅳ by hydrogenolysis, and, similarly, Ⅵ...

Aureomycin (Ⅰ) on reduction with zinc-acetic acid gives desdimethylaminoaureomycin (Ⅱ) under mild conditions and desdimethylaminodesoxyaureomycin (Ⅲ) under more drastic conditions. Ⅱ can be converted into Ⅲ by further reduction. Treatment of Ⅰ, Ⅱ or Ⅲ with concentrated hydrochloric acid or methanolic HCl produces anhydroaureomycin (Ⅳ), desdimethylaminoanhydroaureomycin (Ⅴ) or desdimethylaminodes- oxyanhydroaureomycin (Ⅵ) respectively. Compound (Ⅴ) can be obtained from Ⅳ by hydrogenolysis, and, similarly, Ⅵ from either IV or V. All the above compounds, (Ⅰ), (Ⅱ), (Ⅲ), (Ⅳ), (Ⅴ) and (Ⅵ), when subjected to zinc dust distillation, form naphthacene. A comparison of the ultra-violet absorption spectra of Ⅰ, Ⅱ, Ⅲ, Ⅳ, Ⅴ and Ⅵ affords a supplementary evidence for the location of the angular-OH group in the structure of aureomycin.

金黴素(I)在冰醋酸與甲醇溶液中,用鋅粉氫解,在温和條件下,產生脫二甲胺金黴素(II);較劇烈條件下,則生成脫二甲胺脫羥金黴素(III)。III從II經鋅粉醋酸氫解得到。 I,II,III分別與濃鹽酸或甲醇鹽酸處理相應地得到脫水金黴素(IV),脫二甲胺脫水金黴素(V)及脫二甲胺脫羥脫水金黴素(VI)。脫水金黴素(IV)經鋅粉醋酸氫解亦產生V與VI。VI亦可從V製成。 I,II,III,IV,V或VI和鋅粉共同蒸餾,皆得到并四苯。 從紫外吸收光譜測定,對金黴素結構中二甲胺基及角羥基的位置有補充的說明。

 
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