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  “─oh”译为未确定词的双语例句
     Thymopoietin Ⅱ(32─36)OH,Arg─Lys─Asp─Val─Tyr─ON(TP─5)was synthesizedhy the solid phase peptide synthesis and BOC strategy. The purified peptide was judged to behigher than 98%in purity by using HPLC.
     采用多肽固相合成法合成了胸腺生成素Ⅱ(Arg─lys─Asp─Val─Tyr─OH(TP─5)),经HPLC检查其纯度达98%以上,氨基酸组成分析与预期结果相一致,质谱法测得分子量与理论值相符合。
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     Micro-IR spectra shows that the structures of the silicate melts (relative acid globe and basic melt) mainly consist of [SiO4] group; but in the structure of the ore-forming melt exist Ca-F, Ca-OMo, H-O-H, and X-OH (X=cations) groups demonstrating that H2O and F concentrated in the oreforming melt.
     红外光谱研究表明:硅酸盐熔体结构以[SiO4]基团为主,而成矿熔体结构中存在Ca—F、Ca—O—Mo、H—O—H以及X─OH(X=阳离子)基团,说明H2O和F富集在成矿熔体中。
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     When the soil was bonded,there were a great number of reactive groups(-Si-OH) in the activated gel SiO_2,which further interacted with soil and produced silicon-oxygen bond Si-O-M.
     土壤经粘结处理后 ,活化的SiO2 凝胶中含有大量的活性基团 (─Si─OH) ,这些活性基团和土壤中的物质进一步反应 ,脱水生成硅氧化学键Si─O─M。
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     By using thiobarbituric acid reaction,spin trapping technique,chemiluminescence method,fluorescence assay of benzoic acid OH-adducts etc,the effects of Nef on lipid peroxides and O~- or OH in free radical system were studied.
     用硫代巴比妥酸(TBA)比色法、电子自旋捕集技术、化学发光法及检测苯甲酸──OH.加成物等方法,研究了甲基莲心碱(Nef)清除氧自由基及抗脂质过氧化作用。
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     The resules of IR andTGA analysis show that different catalystshave different amount of ─ OH group, whichmay attribute to the different activities of catalysts for partial oxidation of methane toHCHO.
     对各种含硅化合物催化剂的红外和热重分析发现,不同催化剂上所含─OH量不同,这可能是催化剂活性差异的原因。
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     The activity of OH-.
     OH.
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     OH.
     OH
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     High resolution speometry:Background of OH bands in ICP spectrum
     高分辨率光谱ICP光谱的OH背景
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     Study on Reutilization of Waste Residue-Aluminum Gel
     废渣Al(OH)_3凝胶再利用研究
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     Totally L-matrix
     整体L矩阵
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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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