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特征吸收带
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  typical absorption bands
     There are three typical absorption bands centered at 223nm, 340nm and 460nm in the absorption spectra, and the emission peak centered at 550nm in XEL spectra, which is well coupled with that of silicon photodiodes.
     吸收光谱显示了Ce3 + 离子的 3个特征吸收带 ,对应的中心波长分别为 2 2 3nm ,340nm及4 6 0nm ; XEL发射谱表明Ce :YAG的发射峰为 5 5 0nm ,能与硅光二极管有效地耦合。
短句来源
  intrinsic absorption band
     Experimental results indicate that frequency of intrinsic absorption band is related to the charecteristic of basal material.
     实验结果表明,特征吸收带的频率与基材物质的性质有关。
短句来源
  characteristic absorption band
     The peak-value of characteristic absorption band of Mo (Ⅳ) complex at 512 nm varies with the amount of cocatalyst added into Mo-Al system. The disappearance of the characteristic absorption band implies that Mo( Ⅳ ) is reduced to a low-valency state Mo( Ⅲ ).
     Mo(Ⅳ)在512 nm处的特征吸收带随Al(i-Bu)_3/Mo或Al(i-Bu)_2OPh/Mo增加而渐趋消失,这是Mo(Ⅳ)→Mo(Ⅲ)反应的标志.
短句来源
     The location of lanthanum cation in LaHY zeolite with various degrees of cation exchange has been studied by identification of the characteristic absorption band 1445cm-1 produced by the interaction of La ions and pyridine.
     利用镧离子与吡啶互相作用在红外光谱中出现的1445cm~(-1)特征吸收带,考察了镧离子在LaHY分子筛中随着交换度增加时的定位状况。
短句来源
     The peakvalue of characteristic absorption of Mo (Ⅳ) complex at 512 nm varies with the amount of cocatalyst added into Mo-Al system. The disappearence of the characteristic absorption band implies that Mo (Ⅳ) is reduced to low-valency species.
     Mo(Ⅳ)在512nm处的特征吸收带随Al(i—Bu)_3/Mo或Al(i—Bu)_2OPh/Mo增加而渐趋消失,这是Mo(Ⅳ)被还原为低价态的标志。
短句来源
     A method for the determination of allantion by IR spectrometry has been studied. Its characteristic absorption band at 1772cm~(-1) is chosen as the analytical peak and the peak of KSCN at 2050cm~(-1) is used as the internal reference peak.
     本文研究了用红外光谱法测定尿囊素的条件,提出了用内标法、利用1772cm~(-1)尿囊素的特征吸收带定量检测尿囊素的测定方法。
短句来源
     This paper described a method on the determination of bound styrene content in the carboxylated styrene butadiene rubber latex by IR spectrometry. By this, characteristic absorption band in that rubber latex at 1495cm(-1) is chosen as the aryl C =C stretching vibration of stWene, and that at 970cm(-1) as the trans C=C wagging vibration of butadiene respectively.
     本文介绍了用红外光谱法测定羧基丁苯胶乳中结合苯乙烯含量的方法,通过该方法分别选择1495cm~(-1)作为苯乙烯的芳烃C=C伸缩振动特征吸收带和970cm~(-1)作为丁二烯的反式C=C非平面摇摆振动特征吸收带
短句来源
  “特征吸收带”译为未确定词的双语例句
     The infra-red spectrum of pyridine poisoned catalyst hasshown that specific adsorption band at 145O. 4cm~(-1) and 1536.3cm~(-1),theratio of the surface concentration of L acid and B acid and their surfaceconcentration thus obtained are C_L/C_B=1.68,C_L%=62.69%,CB%=37.31%,respectively.
     对脉冲中毒催化剂进行红外光谱检测,发现1450.4Cm~(-1)和1536.3Cm~(-1)处有吡啶分子与 L 酸和 B 酸作用的特征吸收带,给出了L 酸和 B 酸含量之比 C_L/C_B=1.68,相对含量 C_L%=62.69%,C_B%=37.31%.
短句来源
     The hydrogenated nitrile rubber NBR-230 has been studied by IR method. we find that with the increasing of the degree of hydrogenation,the ratio A(724cm-1 )/A(2236cm-1)=A,increases while the ratio A(970cm-1)/A(2236cm-1)=A2 reduces.
     用红外光谱(IR)研究氢化NBR—230型丁腈胶中发现,724cm-1和2236cm-1特征吸收带的相对吸光度(A1)随着丁腈胶加氢程度(饱和度=H)的增加而增大,970Cm-1和2236cm-1特征吸收带的相对吸光度(A2)随着氢化丁腈胶饱和度的增加而减小。
短句来源
     Within IR region of 400~1600cm -1 ,400~600cm -1 absorption band is the characteristic absorption of MgF\-2 crystal whereas 730~1250cm -1 absorption band is caused by Ag\|MgF\-2 cermet with compound structure.
     在400~1600cm-1波数范围,Ag-MgF2金属陶瓷薄膜具有400~600cm-1的MgF2晶体特征吸收带和Ag-MgF2复合结构产生的730~1250cm-1的吸收谱带;
短句来源
     UV-Vis shows that the feature absorption intensity of C60 in the copper-fullerene-hexane sol decreases, while the absorption band of copper-cluster sol from 190 nm to 240 nm increases.
     UV-Vis发现(Cu-C60)/正已烷溶胶中C60的特征吸收峰值下降,在195-240nm之间出现了增强的铜溶胶特征吸收带;
短句来源
     The N content of products increased while theheat-treatment temperature elevated. The spectrum of IR showed that the characteristic absorbing band of BN appeared at 900℃.
     对先驱体在不同温度热处理的产物进行了研究,表明热处理产物的氮含量随着温度的升高而增大,IR光谱表明先驱体900℃热处理后的产物中出现BN的特征吸收带
短句来源
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  typical absorption bands
Laser wavelengths of 6.18 or 6.31 μm, the typical absorption bands of carboxyl groups of heparin and aromatic rings in PSF, respectively, were chosen to irradiate the thin heparin membrane formed on PSF surfaces.
      
The richness in O and some typical absorption bands in the FT-IR spectra indicated that the 100-1000?Da fraction had a lot of carboxyl moieties.
      
For organic and inorganic molecules whose spectra exhibit typical absorption bands, the refractive index changes across the absorption band.
      
  intrinsic absorption band
It is found that, as the intrinsic absorption band of each crystal is approached, the crystal refractive index increases.
      
  characteristic absorption band
The absence of the main characteristic absorption band of the NpO2+ dioxocation (980 nm) in the electronic absorption spectrum suggests centrosymmetrical equatorial surrounding of the Np(V) atom.
      
It is shown that the change in the profile of the characteristic absorption band and the position of its peak correlate with the characteristics of formation of the ripples on the silicon surface.
      
The new center possesses a characteristic absorption band at 250nm, at the long wavelength side of the knownHi0 absorption band (235nm).
      
IR spectra of these spots showed a characteristic absorption band of resin acids at 1697?cm-1.
      
The introduction of PBTPA was confirmed by the presence of the characteristic absorption band attributed to PBTPA from a Fourier transform infrared spectra.
      
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The characteristic infra-red absorption bands for the cis- and trans-forms of the polyester from maleic anhydride-ethylene glycol have been identified by comparison with the absorption bands of the corresponding model compounds, i.e., diethyl maleate and diethyl fumarate: Cis-form—825, 1410, 3052 cm~(-1); trans-form—780, 1371, 3072 cm~(-1). The ratio of the optical densities of the 825 and 780 cm~(-1) bands has been chosen for the determination of the ratio of cis-.and trans-forms present in the polyester. Increased...

The characteristic infra-red absorption bands for the cis- and trans-forms of the polyester from maleic anhydride-ethylene glycol have been identified by comparison with the absorption bands of the corresponding model compounds, i.e., diethyl maleate and diethyl fumarate: Cis-form—825, 1410, 3052 cm~(-1); trans-form—780, 1371, 3072 cm~(-1). The ratio of the optical densities of the 825 and 780 cm~(-1) bands has been chosen for the determination of the ratio of cis-.and trans-forms present in the polyester. Increased temperature and duration of polyesterification increased the trans-content of the polyester obtained. The cis-trans isomerization reaction has been shown to be a first order reaction with an activation energy of 19 kcal/mole. The large increase of viscosities of reaction mixture during polyesterification of maleic anhydride and ethylene glycol is mainly due to the increase of trans-content of the polyester formed.

1.以顺式和反式丁烯二酸二乙酯为模型化合物,确定表征聚酯中顺、反构型的红外光谱特征吸收带。顺式为825,1410和3052厘米~(-1),反式为780,1371和3072厘米~(-1)。 2.测定一系列顺式聚酯和反式聚酯混合弑样在825和780厘米(-1)的光密度比值,得到可以定量顺、反构型的工作曲线。 3.缩聚反应温度和反应时间对顺-反异构化有显著的影响。提高温度和延长反应时间都会增加聚酯中反式构型的含量。顺-反异构化反应系属一极反应,反应活化能为19千卡/克分子。 4.在顺丁烯二酸酐和乙二醇的缩聚过程中反式构型的增多是聚合物粘度增大的主要因素。

The location of lanthanum cation in LaHY zeolite with various degrees of cation exchange has been studied by identification of the characteristic absorption band 1445cm-1 produced by the interaction of La ions and pyridine. In the same calcination and evacuation conditions, for LaHY with lower degree of La exchange, La cations are located in the small cages. As the degree of La exchange exceeds 69%, the La cations begin to appear in the supercages. These results are in accordance with the X-ray diffraction data...

The location of lanthanum cation in LaHY zeolite with various degrees of cation exchange has been studied by identification of the characteristic absorption band 1445cm-1 produced by the interaction of La ions and pyridine. In the same calcination and evacuation conditions, for LaHY with lower degree of La exchange, La cations are located in the small cages. As the degree of La exchange exceeds 69%, the La cations begin to appear in the supercages. These results are in accordance with the X-ray diffraction data of La(98)HY. When the temperature of evacuation is increased, the migration of La cations becomes evident, thus with increasing the evacuation temperature, the hydrated La cations exchanged at room temperature and located in the supercages gradually transfer into the small cages. For LaHY with higher degree of La exchange, a part of La cations would return back into the supercages at higher temperature of evacuation. Upon rehydration and dehydration, this part of La cations would move again into the small cages, so the migration process of La cations in the Y zeolite is reversible and is related to the process of dehydration.

利用镧离子与吡啶互相作用在红外光谱中出现的1445cm~(-1)特征吸收带,考察了镧离子在LaHY分子筛中随着交换度增加时的定位状况。在同样的活化和真空脱气的条件下,低镧交换度的LaHY,其镧离子定位在小笼中;当镧交换度超过69%以后,镧离子出现在大笼中。La(98)HY的X光衍射结果与红外光谱测定的结果一致。改变真空脱气温度时,发现镧离子在Y型分子筛中移动。在室温下交换而定位在大笼中的水合镧离子,随着脱气温度的提高,逐渐转移到小笼中。高交换度的LaHY,在更高的脱气温度下,一部分镧离子又回到大笼中;再经吸水和脱水,镧离子又可返回小笼中。这说明镧离子在Y型分子筛中是可移动的,而且其移动性与脱水过程有关。

Infrared spectroscopic analysis was used in the study of sulfoaluminate cementclinker, showing that the clinker minerals have their characteristic IR absorption bands.1098cm~(-1) or 641cm~(-1) absorption band and 520cm~(-1) band are suggested by the author for theidentification of C_4A_3S and β-C_2S respectively.Results show that IR is an effective meansfor the study of sulfoaluminate cement clinker both qualitatively and quantitatively.Besides, IR evidence shows that C_2S in sulfoaluminate cernent exists as...

Infrared spectroscopic analysis was used in the study of sulfoaluminate cementclinker, showing that the clinker minerals have their characteristic IR absorption bands.1098cm~(-1) or 641cm~(-1) absorption band and 520cm~(-1) band are suggested by the author for theidentification of C_4A_3S and β-C_2S respectively.Results show that IR is an effective meansfor the study of sulfoaluminate cement clinker both qualitatively and quantitatively.Besides, IR evidence shows that C_2S in sulfoaluminate cernent exists as a solid solutionand that small amounts of other elements are taken up by ettringite in the cementpaste to form solid solution. Characteristic absorption bands are also given in this paper for different hydratedphases of sulfoaluminate cement.The process of hydration of sulfoaluminate cement isdiscussed, based on IR spectra of cement pastes for different ages.

对硫铝酸盐水泥熟料进行了红外光谱分析。结果表明,熟料矿物各有其红外特征吸收带。提出以1098cm~(-1)或641cm~(-1)的吸收带作为C_4A_3S 的鉴别特征;520cm~(-1)为β-C_2S的鉴别特征。据此,可用红外光谱对硫铝酸盐进行快速定性、定量分析。红外分析还表明,硫铝酸盐水泥熟料中的硅酸二钙以固溶体存在,并推断水泥浆体中的钙矾石固溶了少量其他元素。 本文还提出了硫铝酸盐水泥各水化相的红外鉴别特征,并根据不同龄期水化浆体的红外光谱,讨论了硫铝酸盐水泥的水化过程。

 
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