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    Study on Two Peak Phenomena in Micellar Electrokinetic Capillary Chromatography
    胶束电动毛细管色谱双现象研究
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    INVESTIGATIONS IN THE DETERMINATION AND CALCULATION OF SPECIFIC SURFACE AREA AND PORE SIZE DISTRIBUTION——Ⅰ.THE STANDARdIZATION FOR PEAK AREA IN THE ADSORPTION DETERMINATION AND THE INVESTIGATION OF THE CALCULATION FOR PORE SIZE DISTRIBUTION
    比表面积与孔径分布的测定和计算中一些问题的研究 Ⅰ.吸附量测定中面积的标定和孔径分布计算的研究
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    STUDY OF POLYBUTADIENE CHAIN MICROSTRUCTUREBY ~(13)C-NMR——The S-Resonancc Peak of the C-1,4-VCH Linkage
    ~(13)C-NMR研究聚丁二烯的链结构——顺-1,4与1,2-乙烯基-CH-键合点的S
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    End Process in Chromatographic Column and Linear Relationship between Half Peak Width and Retention Time
    色谱柱末端过程与宽规律性
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    ON THE PEAK SPREADING CORRECTION IN GPC Ⅲ.A COMPUTER PROGRAM OF PEAK SPREADING CORRECTION FOR GPC CHROMATOGRAM
    凝胶渗透色谱法加宽改正问题——Ⅲ.一种GPC谱图加宽改正程序
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  peaks
    Time Shifts of Absorption Signal and the Formation of Double Peaks for Lead in Graphite Furnace Atomizer
    石墨炉原子化器中铅吸收信号的时间位移和双形成
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    EFFECT OF SEQUENCE STRUCTURE ON THERMALLY STIMULATED CURRENT PEAKS OF STYRENE/ BUTADIENE COPOLYMER
    序列结构对苯乙烯/丁二烯共聚物热释电流的影响
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    Analysis of Asymmetrical Peaks by Statistical Moments Theory
    应用统计矩概念分析不对称
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    THE CRYSTAL MORPHOLOGY AND THE DOUBLE MELTING PEAKS OF PEG-PET COPOLYESTER FIBERS
    PEG-PET共聚酯纤维的晶体形态与熔融双
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    Study on the Double Endothermic Peaks at T_g of PET
    PET玻璃化转变温度处双重吸热的研究
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  “峰”译为未确定词的双语例句
    STUDY OF THE SURFACE ACIDITY OF ZEOLITE BY TEMPERATURE PROGRAMMED DESORPTION (TPD) Ⅱ.TPD SPECTRA OF n-BUTYLAMINE ADSORBED ON NaY TYPE ZEOLITES WITH DIFFERENT EXCHANGE-PERCENTAGE OF Na~+ WITH Ca~(2+) AND NH_4~+
    程序升温脱附研究沸石的表面酸性 Ⅱ.在不同Ca~(2+),NH_4~+离子交换度的Y型沸石上正丁胺的程序升温脱附
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    SEPARATION METHOD OF LANTHANIDE-INDUCED CONTACT AND DIPOLAR ~(13)C-NMR SHIFT AND ITS USE FOR ASSIGNMENT α-CHLORO ANTHRAQUIN-ONE SPECTRAL LINES
    ~(13)C-NMR镧系诱导位移中接触成份和偶极成份的分离方法及其对α——氯蒽醌谱归属的应用
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    INFRARED WAVE NUMBERS' REGULARITY OF AMMINE COORDINATION COMPOUNDS
    氨配合物红外吸收波数规律(Ⅰ)
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    Study on X-Ray Photoelectron Spectra of Lanthanide Complexes of Crown Ethers Ⅰ.Ln 3d_(5/2) Spectra and Satellite Phenomena for Ln(No_3)_3·C_(14)H_(20)O_5 and Ln(NO_3)_3·C_(20)H_(24)O_6
    稀土冠醚配合物的XPS研究 Ⅰ.Ln(NO_3)_3·C_(14)H_(20)O_5和Ln(NO_3)_3·C_(20)H_(24)O_6的Ln 3d_(5/2)光电子能谱及其伴
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    The Determination of Chromium(Ⅵ) in the High Acidic Medium by Mono- and Dual- Wavelength Spectrophotometry
    高酸度条件下单波长、双双波长分光光度法测定铬(Ⅵ)
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  peak
The α-isomer exhibited rapid and significantly higher peak plasma concentrations in all the species post intramuscular administrations, while β-isomer showed prolonged plasma levels.
      
The peak potential obtained was -1.17 V (vs Ag-AgCl).
      
The peak current was proportional to the concentration of calcium in the range of 5.0×10-8-4.2×10-5 mol L-1.
      
But at the end of the period, i.e., 2 or 3 days before the cell density reaches the maximum, an NO peak appeared, with the NO concentration reaching 10 nmol/L.
      
The unbound ketoprofen concentration was directly measured from the height of the frontal peak.
      
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  peaks
The liquid chromatograms obtained by TIC from ESI-MS provided more information on chromatographic peaks than those obtained by DAD or TIC from APCI-MS.
      
The maximum RRS peaks are at 307 nm (hsDNA, sDNA) and 290 nm (ctDNA), and other peaks are at 350 nm.
      
The main characteristic peaks in these transient absorption spectra were attributed and the growth-decay trends of several transient species were investigated.
      
Three oxidation peaks were observed for CO absorbed on Pt-CNTs/GC electrodes.
      
Among the three oxidation peaks, peak I was presumed to be due to the bridged CO absorption while peaks II and III were attributed to the split in the linear CO which is absorbed on the Pt-CNTs/GC nanocluster with different particle size and Pt film.
      
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2,4-Dioxyacetophenon und Eisen(III)sind von Nichols und Condo als Reagenzien fur Fluoridbestimmungen empfohlen worden. Urn sie noch eingehender zu studieren, haben wir Versuche iiber die Brauchbarkeitsgrenzen und EmpfindHchkeit dieser Methode, den optimalen pH-Bereich und die Storungen, sowie die Natur des roten Komplexes von Dioxyacetophenon und Eisen, angestellt. Und die Ergebnisse werden hierher berichtet.Ein photoelektrisches Kolorimeter (Dr. Lange, Modell IV) rait blauem Filter (BG 7) und 100 ml Kuvetten...

2,4-Dioxyacetophenon und Eisen(III)sind von Nichols und Condo als Reagenzien fur Fluoridbestimmungen empfohlen worden. Urn sie noch eingehender zu studieren, haben wir Versuche iiber die Brauchbarkeitsgrenzen und EmpfindHchkeit dieser Methode, den optimalen pH-Bereich und die Storungen, sowie die Natur des roten Komplexes von Dioxyacetophenon und Eisen, angestellt. Und die Ergebnisse werden hierher berichtet.Ein photoelektrisches Kolorimeter (Dr. Lange, Modell IV) rait blauem Filter (BG 7) und 100 ml Kuvetten ist verwendet worden. Man fiigte 10.0 ml (bzw. 7.5 und 5.0 ml) Eisanchloridlosung (1 mg Fe), 1 ml zehn-procentiges (gew/vol) Dioxyacetophenon in Aceton, 50 ml Azetat-Bufferlosung und verschiedene Mengen von Fluoridlosung (0—9 mg F') in einem Messkolben hinzu, verdunnte bis zum 100 ml und kolorimetrierte die rote Losung. Die Resultate sind in folgender Tabelle zusammengestellt. Brauchbarkeitsgrenzen, mg F/100 ml Losg mit 1 mg Fe 0.75 mg Fe 0.5 mgFe 0.02-1.0 0.01_5-0.5_5 0.005-0.2_3 0.2 0.1_5 0. EmpfindHchkeit, mg F/1 1 Losg Die Konzentrationen des Fluorids, die eine Absorption von 20—60% bewirken, werden als Brauchbarkeitsgrenzen angenommen. Als die EmpfindHchkeit der Methode wird die niedrigste Konzentration des Fluors, welche ein-prozentige Abnahme in Absorption verursacht, angesehen. Es ist offenbar, dass mit abnehmender Konzentration des Eisens, die Brauchbarkeitsgrenzen dieser Methode sich verengen, wahrend ihre EmpfindHchkeit zunimmt. Dieser Befund bestatigt das Ergebnis, welches wir schon bei den Yatren-Eisen-Reagenzien fiir Fluorid-Bestimmung gefunden haben. Die EmpfindHchkeit dieser Reagenzien ist etwa zweifach grosser als die der Yatren-Eisen-Reagenzien, aber die Brauchbarkeitsgrenzen der erstere sind viel enger als die der letztere. Der giinstige pH-Wert Hegt bei 1.95—2.5. Chlorid und Nitrat storen wenig und Sulfat, ziemlich gross. Um gute Resultate zu bekommen, sind die betreffenden Salzen bis zu den folgenden Konzentrationen noch zulassig: 0.1 gram Natriumchlorid, 0.2 gram Natriumnitrat oder 2 mg Natriumsulfat in 100 ml Probelosung. Sulfid, Bicarbonat und Cyanid sowie Titan (IV) und Zirkonium (IV) diirfen iiberhaupt nicht vorhanden sein. Hinsichtlich der Storungen stehen diese Eeagenzien den Yatren-Eissn-Reagenzien nach.Das Absorptionsmaximum des Dioxyacetophenon-Eisen (III)-Komplexes liegt bei 470 mμ(mit Spektrophotometer bestimmt). Es wandert sich nicht wenn man eine Spannung aufgelegt ist, und ist deshalb elektrisch neutral. Mit Jobscher Verdunnungsmethode ist es gefunden worden, dass das Verhaltnis zwischen Eisen und Dioxyacetophenon im Komplex zwei zu drei ist. Auf diese Weise, behaupten wir diesen Komplex als einen mit zwei Eisenatomen als Zentralatome und mit drei Radikalen und einigen Acetationen als Liganden oder Briicken. Ob die Behauptung richtig ist, sind natiirlich weitere Beweise benotigt.

本文报告以2,4-二羟基苯乙酮和鉄(III)作试剂测定氟的适宜pH范围为1.95—2.5。试剂中鉄量减少则可测度降低和使用范围缩小。可测度约为鉄试剂之半(更灵敏)。使用范围不及鉄试剂广。所受干扰亦较鉄试剂为烈。氯离子和硝酸根的干扰不大。硫酸根影响颇巨。硫离子,碳酸氢根和氰根应除去。四价钛及锆亦不应存于试液中。 2,4-二经基苯乙酮和三价鉄所成络合物之最大吸收在470mμ(此时有机试剂之吸收几等于零),不带电荷,其中鉄与有机试剂之比为2:3。

Reaction between 4, 4'- di-[dimethylamino]-diphenylmethane (Ⅰ) and iodosyl sulfate (Ⅱ) in concentrated sulfuric acid solution gave an iodine heterocycle, 3, 6-di-[dimethylamino]-dibenzopyriodonium iodide dihydriodide(Ⅲ_a·2HI), m.p. 179—181° (decomp.), with a yield of 77%. The free iodide (Ⅲ_a), m.p. 195.5° (decomp.), was obtained, when the dihydriodide (Ⅲ_a·2HI) was treated with dilute sodium hydroxide solution and chloroform. The thermal decomposition of the iodide (Ⅲ_a) at its melting point yielded 2, 2'-diiodo-4,...

Reaction between 4, 4'- di-[dimethylamino]-diphenylmethane (Ⅰ) and iodosyl sulfate (Ⅱ) in concentrated sulfuric acid solution gave an iodine heterocycle, 3, 6-di-[dimethylamino]-dibenzopyriodonium iodide dihydriodide(Ⅲ_a·2HI), m.p. 179—181° (decomp.), with a yield of 77%. The free iodide (Ⅲ_a), m.p. 195.5° (decomp.), was obtained, when the dihydriodide (Ⅲ_a·2HI) was treated with dilute sodium hydroxide solution and chloroform. The thermal decomposition of the iodide (Ⅲ_a) at its melting point yielded 2, 2'-diiodo-4, 4'-di-[dimethylamino]-diphenylmethane, m. p. 124°, picture, m. p. 153.5—154.5°. The iodide (Ⅲ_a) could be converted to the formate (Ⅲ_a), m.p. 136.5° (decomp.), by treating its solution in formic acid with silver oxide. The formate (Ⅲ_a) was found to be readily converted to other salts, when its saturated alcoholic solution was reacted with corresponding acids [excepting for thiocyanate (Ⅲ_a), potassium thiocyanate was used] or phenolic compounds, respectively. The melting points (with decomposition) of these salts are as follows: Bromide (Ⅲ_b), 197.5°; chloride (Ⅲ_c), 197.5°; thiocyanate (Ⅲ_e), 153.5—155°; picrate (Ⅲ_f), 152—153°; benzoate (Ⅲ_g), 144°; o-nitrobenzoate (Ⅲ_h), 128—130.5°; cinnamate (Ⅲ_i), 117.5°; oxalate (Ⅲ_j), 159°; malonate (Ⅲ_k), 130°; maleate (Ⅲ_l), 160°; fumarate (Ⅲ_m), 171—171.5°; tartate (Ⅲ_n), 153.5—154°; malate (Ⅲ_o), 156.5°; p-cresolate (Ⅲ_p), 130°; p-chlorophenolate (Ⅲ_q), 129°; α-naphtholate (Ⅲ_r), 128.5—129°; o-nitrophenolate (Ⅲ_s), 138.5°; m-nitrophenolate (Ⅲ_t), 129.5—130°, p-nitrophenolate (Ⅲ_u), 124°; 2, 4-dinitrophenolate (Ⅲ_v), 145°; pyrocatecholate (Ⅲ_w), 121.5°; resorcinolate (Ⅲ_x), 143°; hydroquinolate (Ⅲ_y), 121.5°; pyrogallolate (Ⅲ_z), 140.5°. These salts were soluble in methanol, ethanol, chloroform or pyridine with different solubilities, and those sults, which contain organic anionic halves, were easily dissociated by treating their solutions in chloro- form with aqueous sodium chloride or dilute hydrochloric acid, and then the acids or phenols originally used could be recovered.The UV spectrum of the chloride (Ⅲ_c) shown in figure 1 possessed two maxima, i. e.,λ_(max) 265 (266) mμ, logε 4.51, and λ_(max). 313 mμ, logε 3.73, and seemed to be analogously related to that of 4, 4'-di-[dimethylamino]-diphenylmethane (Ⅰ), which had been reported by V. V. Perekalin et al. (1952).It was found that a solution of 10 γ/ml of the formate (Ⅲ_d) in water would inhibit the growth of B. Subtihs (Oxford Cup Test) with an inhibition diameter of 11.6 mm and 13 mm, while under the same conditions streptomycin would produce the same effect with only a concentration of 1 γ/ml.

(一)以4,4′-二-[二甲氨基]-二苯甲烷(Ⅰ)、硫酸亞碘酰(Ⅱ)及碘化鉀制成3,6-二-[二甲氨基]-二苯并碘六圜碘化物二氫碘酸鹽(Ⅲ_a·2HI),产率77%。 (二)碘化物二氫碘酸鹽(Ⅲ_a·2HI)以稀氫氧化鈉与三氯甲烷处理,得到碘化物(Ⅲ_a)。Ⅲ_a在其熔点温度热解,得到已知化合物——2,2′-二碘代-4,4′-二-[二甲氨基]-二苯甲烷(Ⅳ);并制备Ⅳ的苦味酸衍生物。 (三)碘化物(Ⅲ_a)的甲酸溶液以氧化銀处理,濾液經减压濃縮后,得到甲酸鹽(Ⅲ_d)。 (四)甲酸鹽(Ⅲ_d)的饱和乙醇溶液分别与若干种無机酸、鹽、有机酸及酚类化合物等作用,均得到相应的置換产物(Ⅲ)。所得到的有机酸鹽与酚鹽在温和的条件下,容易解离,而收回原用的有机酸或酚类化合物。甲酸鹽对枯草杆菌有抑制作用。 (五)氯化物(Ⅲ_c)的紫外吸收光譜(如圖1曲綫1),显示有兩个吸收。与4,4′-二-[二甲氨基]-二苯甲烷(Ⅰ)者相近似。

The amylose-iodine complex is an inclusion compound of a long chain of equi-distant iodine atoms in an amylose helix consisting of glucose units. Its spectrum has been explained quantummechanically by Cramer and Herbst and by Murakami using a one-dimensional free-electron model. But they obtained only the first absorption band, while it has been found, experimentally that there are at least two or possibly three more bands in the ultraviolet region (See Fig. 4, p. 22).In the present investigation we have proposed...

The amylose-iodine complex is an inclusion compound of a long chain of equi-distant iodine atoms in an amylose helix consisting of glucose units. Its spectrum has been explained quantummechanically by Cramer and Herbst and by Murakami using a one-dimensional free-electron model. But they obtained only the first absorption band, while it has been found, experimentally that there are at least two or possibly three more bands in the ultraviolet region (See Fig. 4, p. 22).In the present investigation we have proposed a three-dimensional free-electron model in which the valence electrons of the conjugate iodine chain are assumed to move freely in a cylinder whose length is equal to that of the iodine-chain and whose diameter is equal to that of the effective internal diameter of the amylose helix. The results obtained were in good agreement with the experimental observations.

1.用多原子π键的形成和σ键的消失来解释复合物中碘链的稳定性、反磁性、原子间等距排列和碘离子参与碘链等事实。 2.用量子力学的圆柱体自由电子模型计算了共轭碘链的能级,不仅得到第一吸收,而且还得到第二、三、四吸收。 3.研究了紫外和可见区的全部吸收光谱,得到淀粉团——碘复合物在570mμ,344mμ和224mμ的三个吸收(前人一般只研究第一、二吸收),在200mμ以下还可能有一吸收,但限于仪器的波长范围未能观察到。以上实验结果和理论计算颇为接近。

 
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