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特征吸收峰
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  characteristic absorption peak
    IR spectra of graft copolymers existed the carbonyl C=O characteristic absorption peak at 1730-1750 cm-1 besides the characteristic absorption peak of starch.
    自交联型淀粉接枝共聚物中除了保持淀粉的特征吸收峰外,在1730~1750cm~(-1)之间出现酯羰基特征吸收峰
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    The results compared by examination for PEG with PEGoCaCl_2 indicate that the characteristic absorption peak of IR at center around 1110cm~(-1) for C-O-C bond in PEG had shifted up to 1073cm~(-1) at lower wave number, and melting point of PEG had increased prominently from 53.6℃ to 74.1℃ after calcium chloride was added.
    PEG和PEG-CaCl_2的测试结果表明,由于CaCl_2的加入,PEG中C-O-C键以1110cm~(-1)为中心的红外特征吸收峰漂移至1073cm~(-1)处。
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    The diazonium group characteristic absorption peak of UV-VIS spectra is 398. 2nm and the temperature of decomposition is 158℃.
    产品紫外特征吸收峰艾λ_(max)=398. 2nm,热分解温度为158℃.
短句来源
    The diazonium group characteristic absorption peak of UV-VIS spectra is 389.8nm and the temperature of decomposition is 142℃.
    其产品紫外特征吸收峰λ_(max)=389.8nm,热分解温度为142℃.
短句来源
    By means of infrared spectroscopy analysis,a stron8 peak in 1893cm ̄(-1) is found。 and this one is a characteristic absorption peak of M-CO in [Co(Co)_4]complex ion。
    产物经IR光谱鉴定,在1893cm ̄(-1)处有一强吸收峰,此峰为[Co(Co)_4]络合物离子中M-CO的特征吸收峰
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  characteristic absorption peaks
    The authors can confirm the sort and relative content of supplementary materials by the characteristic absorption peaks between 1 160 and 1 000 cm-1 , and evaluate the relative content of effective component by the characteristic absorption peaks at 1 608 cm-1. FTIR spectroscopy is an effective and fast method for not only the quality control of Danshen formula particles but also the identification of manufacturing techniques.
    1 160~1 000 cm-1用于判断所添加辅料类型及含量,1 608 cm-1附近特征吸收峰用来评价配方颗粒中有效成分相对含量。 红外光谱法可用于丹参配方颗粒的质量控制和制备工艺的判断。
    IR spectra results show that there appear the characteristic absorption peaks of the bond C—O—Re(Re:rare earth ions) of rare earth methoxides, rare earth ethoxides and rare earth isopropoxides at the wavelengths of 1 035, 1 050 cm~(-1), and 1 160, 1 130 cm~(-1)respectively.
    各样品的红外光谱中均出现烷氧基与稀土元素键合的C -O -Re(Re为稀土离子 )键的特征吸收峰 ,稀土甲醇盐、稀土乙醇盐和稀土异丙醇盐的特征吸收峰分别位于 1 0 35 ,1 0 5 0cm- 1 和 1 1 6 0cm- 1 与 1 1 30cm- 1 左右。
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    The reaction of triphenyltin chloride with dithizone occurs in an alkaline medium of pH 10.32. After extracting with dichloromethane, there emerge two characteristic absorption peaks at 450 nm and 609 nm respeetively.
    在pH值为10.32的碱性介质中,双硫腙与三苯基锡发生反应,经二氯甲烷萃取后,在450nm和609nm处产生两个特征吸收峰.
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    Two weak characteristic absorption peaks of polyoxopropyl were observed at 1 374 and 1 010 cm~(-1) by FTIR.
    由红外光谱中1 374和1 010 cm-1的特征吸收峰确定了链中的氧丙基团.
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    Infrared ray spectrum indicates there are typical characteristic absorption peaks of polysaccharides.
    红外光谱分析发现具有典型的多糖特征吸收峰
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  “特征吸收峰”译为未确定词的双语例句
    The infrared spectra show an absorption band at 1060 cm-1. It is assigned to a Mn = O stretch.
    红外光谱在波数为1060cm~(-1)处有Mn=O的特征吸收峰
短句来源
    The generating probability of meso dyad and meso blocks with lengthfrom n to ∞,P_m and P_(m≥n)for polypropylene were calculated from ~(13)C-NMR spectra based on a statistical biactive center model. A combination of~(13)C-NMR,IR data and the statistical model was used to establish the calibra-tion of absorbance ratio of IR bands in stereoregularity analysis.
    由聚丙烯的~(13)C NMR 谱计算出全同二单元组 meso dyad(m)以及连续均为m/长度由 n 到∞ 的生成几率 P_m≥n 等数据,讨论了它们和 FT-IR 测量得到的一些特征吸收峰吸光度比值之间的相关性。
短句来源
    The Fe-OH-Fe bending vibrational frequency at SSOcn-1 demonstrated the polymeric structure. The Fe-O-H bending vibrational frequencies at 1000cm-1, 670cm-1 and 420cm-1 were the evidences of the connections with OH groups between the Fe atoms.
    880cm~(-1)的Fe-OH-Fe弯曲振动证实有聚合态存在,1000cm~(-1),670cm~(-1)和420cm~(-1)的Fe-O-H弯曲振动初步归属为铁与羟基结构的特征吸收峰.
短句来源
    In the IR spectra,there arefcharacteristie bands of Ge-O bonds at ~900 and~800cm~(-1). The FAB-MS data dem-Nonstrate that Ge-132 derivants consist of three-dimention network structure formedrom -Ge-O-Ge- bridge,in which three O atoms are attached to one Ge atcm.
    IR 光谱中均出现800~900cm~(-1)的强γGe-O 特征吸收峰,FAB-MS 和IR 光谱均证实系列衍生物存在-Ge-O-Ge-大环网络结构,并断定它们具有同Ge—132相似的空间结构。
短句来源
    The trithiocarbonate CS_3 group resulted from insertion of CS_2 into Ag—S bond is approximately planar. The C—S bond lengths of CS_3 are distinctly longer than that of uncoordinated CS_2 molecule and shorter than the single-bond length. Its IR spectrum was determined.
    插入反应形成的CS_3基团基本上共面,其C—S键长比CS_2中的键长明显加长,而比单键的C—S键长要短,并在红外光谱上出现特征吸收峰
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  characteristic absorption peaks
Spectrophotometric tracings of deoxycholate-solubilized matrix vesicles showed no characteristic absorption peaks or maxima belonging to any of the cytochrome complex components.
      
In contrast to common inorganic pigments, like Fe2O3, these pigments exhibit well-structured characteristic absorption peaks which allow their recognition.
      
IR studies of these glasses show characteristic absorption peaks corresponding phosphate and vanadium vibrations in the network.
      
Initially, both films lost about 36% weight within 96 h, which also correlated well with the loss in the characteristic absorption peaks in the region of the infrared spectrum typical of biopolymers.
      
Complete disappearance of the characteristic absorption peaks ofpyridinewas found and no new peaks were produced.
      


Although quite a number of tetravalent praseodymium compounds have been prepared and well characterized,the solution chemistry of tetravalent praseodymium is little known.By means of "Carrier oxidation"through cerium from a 4:1 mixture of Ce (Ⅲ) and Pr (Ⅲ) nitrate in aqueous solution,using ozone as oxidizing agent at room temperature and at pH around 6.5,a more reactive heteropolynuclear oxide hydrate with chocolate brown color was obtained.After drying in vacuo at a temperature not higher than 50℃,chemical...

Although quite a number of tetravalent praseodymium compounds have been prepared and well characterized,the solution chemistry of tetravalent praseodymium is little known.By means of "Carrier oxidation"through cerium from a 4:1 mixture of Ce (Ⅲ) and Pr (Ⅲ) nitrate in aqueous solution,using ozone as oxidizing agent at room temperature and at pH around 6.5,a more reactive heteropolynuclear oxide hydrate with chocolate brown color was obtained.After drying in vacuo at a temperature not higher than 50℃,chemical analysis and X-ray diffraction pattern( Fig,1,2).confirmed the formation of PrO2 in the mixed oxide.The degree of readiness for that heteropolynuclear oxide to get into solution differs markedly in con.HC1,con.HNO3 and glacial acetic acid.The stability in those solutions also appearsdifferent.In con.HC1,solution formation is very easy;the blood red color due to Pr(Ⅳ) lasts for only a few minutes.Solution formation in con.HNO3 is less easy,but the blood red color lasts much longer.In nitric acid solution,oxidation of MnO2............H2O to MnO4-has been observed visually;transient formation of H2O2 has been revealed in recording spectrophotometer(Fig.4,7).These phenomena substantiate the relative values of their respective electrode potentials given in literature.Solution of Ce(Ⅳ)-Pr(Ⅳ) heteropolynuclear oxide into glacial acetic acid needs brief warming;the blood red color can persist for a long time.Mixed complex compounds containing Ce(Ⅳ) and Pr(Ⅳ) can be obtainedAlthough quite a number of tetravalent praseodymium compounds have been prepared and well characterized,the solution chemistry of tetravalent praseodymium is little known.By means of "Carrier oxidation"through cerium from a 4:1 mixture of Ce (Ⅲ) and Pr (Ⅲ) nitrate in aqueous solution,using ozone as oxidizing agent at room temperature and at pH around 6.5,a more reactive heteropolynuclear oxide hydrate with chocolate brown color was obtained.After drying in vacuo at a temperature not higher than 50℃,chemical analysis and X-ray diffraction pattern( Fig,1,2).confirmed the formation of PrO2 in the mixed oxide.The degree of readiness for that heteropolynuclear oxide to get into solution differs markedly in con.HC1,con.HNO3 and glacial acetic acid.The stability in those solutions also appearsdifferent.In con.HC1,solution formation is very easy;the blood red color due to Pr(Ⅳ) lasts for only a few minutes.Solution formation in con.HNO3 is less easy,but the blood red color lasts much longer.In nitric acid solution,oxidation of MnO2............H2O to MnO4-has been observed visually;transient formation of H2O2 has been revealed in recording spectrophotometer(Fig.4,7).These phenomena substantiate the relative values of their respective electrode potentials given in literature.Solution of Ce(Ⅳ)-Pr(Ⅳ) heteropolynuclear oxide into glacial acetic acid needs brief warming;the blood red color can persist for a long time.Mixed complex compounds containing Ce(Ⅳ) and Pr(Ⅳ) can be obtained from that solution by precipitation with appropriate reagents.By means of recording spectrophotometer,and with the use of Ce(Ⅳ) as reference solutions,absorption bands with highest absorption at 460nm (Fig.3) and 440nm(Fig.10) have been observed in nitric acid and in glacial acetic acid solutions respectively.Those absorption bands are considered to be characteristic of Pr(Ⅳ) compounds.Preliminary experiment reveals that Tb can likewise form Ce(Ⅳ)-Tb (Ⅳ) hetero-polynuclear oxide.Its solution chemistry is quite similar to that of Pr(Ⅳ),but seems to be less stable.The presence of tetravalent praseodymium in the ozonization product of Ce-Pr mixture has also been verified by X-ray photoelectron spectres-copy,to be reported in a Subsequent Paper.from that solution by precipitation with appropriate reagents.By means of recording spectrophotometer,and with the use of Ce(Ⅳ) as reference solutions,absorption bands with highest absorption at 460nm (Fig.3) and 440nm(Fig.10) have been observed in nitric acid and in glacial acetic acid solutions respectively.Those absorption bands ar

在常温常压下,从近中性的混合铈、镨硝酸盐水溶液中,采用臭氧(或氧气)氧化,制得了红棕色的四价铈镨杂多核氧化物,这种在铈的存在下镨的氧化,拟称为“带同氧化”。通过化学分析,X射线衍射物相分析以及与二氧化锰作用的研究,证明了杂多核氧化物中四价镨的存在。该杂多核氧化物溶于浓硝酸、浓盐酸和冰醋酸中,生成血红色的溶液。通过颜色的变化和紫外可见光谱的研究,考察了四价镨在这些溶液中的稳定性。四价镨在冰醋酸中相当稳定,浓硝酸中一小时内逐渐消失,浓盐酸和硫酸(1:1)中则极不稳定。含四价镨的浓硝酸和冰醋酸溶液的吸收光谱,分别在460nm和440nm处呈现宽带特征吸收峰。通过与不含四价镨的纯铈(Ⅳ)、纯错(Ⅲ)及铈钕混合氧化物等光谱的比较,初步认为这两个特征吸收峰与四价镨的存在有关。

Egual gram mole P-dichlorobenzene and anhydrous Sodium Sulfide Were added into the Solvent DMSO. A Small amount of Various Crownether or Polyethylene glycols Was added into the reaction mixture as modifier, after the Polycondensation Was Carried aut at 18010 for 6 hrs., the yellow brown resins Were obtained. The melting-point of resin is in the range of 122- 1951C .Some of the Polymer of M. P. 122 Were Cured in oven at 200 for 4 hrs. and others Were at 220CC for one hour and half. According to the result of...

Egual gram mole P-dichlorobenzene and anhydrous Sodium Sulfide Were added into the Solvent DMSO. A Small amount of Various Crownether or Polyethylene glycols Was added into the reaction mixture as modifier, after the Polycondensation Was Carried aut at 18010 for 6 hrs., the yellow brown resins Were obtained. The melting-point of resin is in the range of 122- 1951C .Some of the Polymer of M. P. 122 Were Cured in oven at 200 for 4 hrs. and others Were at 220CC for one hour and half. According to the result of iR-Bpectroscopic analysis, the resins had already oxidated and Crosslinked, Since there are characterestic absorbing peaks of aryl oxide bond on the spectrogram. The adhesion of the Cured resins to the aluminium alloy plate is in the first class. The kind of pps Can be used as heat-stable and Corrosion-resistant Coating material With much lower Curing temperature than that needed by the Ryton V-1 PPS resin.

将等克分子的对二氯苯和无水硫化钠加入二甲基亚砜溶剂中,添加不同的冠醚或聚乙二醇于反应混合液中作调节剂,在180℃反应6小时即可得到黄褐色聚苯硫醚.聚合物熔点范围为122℃至195℃.将熔点为122℃的聚苯硫醚在烘箱中于200℃加热四小时或220℃加热一小时半即可固化。按红外光谱分析,树脂已实现了氧化交联,图谱上有芳香醚氧键的特征吸收峰.熟化的树脂对铝合金片的粘着力是一级.此类聚苯硫醚树脂可用作耐热、防腐涂层材料。固化温度较Ryton V_1型树脂低.

The extraction behaviour of thorium (Ⅳ) with some crown ethers in 1,2-dichloro-ethane from nitric acid, hydrochloric and and picric acid aqueous solutions has beenstudied. In nitric acid media, thorium (Ⅳ) orms Th (NO3)4·2L·HNO3 (L——crown ether)extracted complex with Dicyclohexyl-18-crown-6(DC18C6) or Dicyclohexyl-24-crown-8 (DC24C8). The extraction equilibrium constants (K) determined at 25℃ are: Kdc18C6 = 3.98 and KDC24C8=6.30.The infrared spectra of the extracted complexes (Th (NO3)4·2DC18C6·HNO3 and Th (NO3)4...

The extraction behaviour of thorium (Ⅳ) with some crown ethers in 1,2-dichloro-ethane from nitric acid, hydrochloric and and picric acid aqueous solutions has beenstudied. In nitric acid media, thorium (Ⅳ) orms Th (NO3)4·2L·HNO3 (L——crown ether)extracted complex with Dicyclohexyl-18-crown-6(DC18C6) or Dicyclohexyl-24-crown-8 (DC24C8). The extraction equilibrium constants (K) determined at 25℃ are: Kdc18C6 = 3.98 and KDC24C8=6.30.The infrared spectra of the extracted complexes (Th (NO3)4·2DC18C6·HNO3 and Th (NO3)4 ·2DC24C8·HNO3) have been examined. The specific absorption bands appeared in differential spectra, indicating that direct bonding probably exists between the extracted metal ion and the oxygen donor in the ring of these crown ethers, and the nitrate group acts as a dentate in these extracted complexes.

本文研究了数种冠醚的1,2-二氯乙烷溶液从硝酸、盐酸和苦味酸等水溶液中萃取钍的行为。在硝酸介质中,钍与二环己基-18-冠-6(DC18C6)或二环己基-24-冠-8(DC24C8)形成了萃合物Th(NO_3)_4·2L·HNO_3(L为冠醚)。其相应的萃取平衡常数(25℃)经测定分别为:K_(DC18C6)=3.98和K_(DC24C8)=6.30。 测定了萃合物Th(NO_3)_4·2DC18C6·HNO_3和Th(NO_3)_4·2DC24C8·HNO_3的红外光谱。差示光谱的特征吸收峰表明,金属离子和冠醚环上氧配位原子之间可能存在直接的键合,以及萃合物中NO_3根参与配位。

 
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