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  iodine fluorescence
    THEORETIC INVESTIGATION OF MEASURING PARAMETERS OF FLOWFIELD BY LASER INDUCED IODINE FLUORESCENCE
    用激光诱导碘荧光法测流场参数的理论研究
    The laser induced iodine fluorescence(LIIF) is an advanced technology to visualize the flowfield. To get the precision of using this method to investigate the mixed performance of the nozzle in chemical lasers, the cold flowfield of HYLTE nozzle in CW DF/HF chemical laser is simulated. The flowfield which uses the mixed gas made up of helium and iodine as the oxidant, the helium gas used as fuel is measured.
    激光诱导碘荧光(LIIF)是一种很好的流场测量技术,为了验证该方法测量化学激光器流场混合性能的精度,模拟得到连续波DF HF化学激光器的HYLTE喷管冷流场,并计算了用氦碘混合气体作为氧化剂流、用氦气作为燃料流的HYLTE喷管的流场。
短句来源
    The hypersonic low temperature (HYLTE) nozzle is widely used in continuous wave (CW) DF/HF chemical laser. To realize the mixing performance of this kind of nozzle, the laser induced iodine fluorescence (LIIF) was used to visualize the mixing flowfield of the single HYLTE nozzle.
    高超音速低温(HYLTE)喷管是目前在燃烧驱动的连续波DF/HF化学激光器中广泛使用的一种喷管,为了掌握该喷管的混合性能,用激光诱导碘荧光(LIIF)法对实验室的单喉道小型燃烧驱动连续波DF/HF化学激光器的高超音速低温喷管的流场进行了测量。
短句来源
  “碘荧光”译为未确定词的双语例句
    STUDY OF IODINE MOLECULE FLUORESCENCE SPECTRA INCAVITY OF A CW CHEMICAL OXYGEN-IODINE LASER
    连续波氧碘化学激光器腔内碘荧光光谱研究
短句来源
    The fluorescence intensity excited by 514.5nm laser with different power is measured, and the dependence of fluorescence on the power of exciting laser is obtained. Although the LIIF has been used to visualize the flowfield in DF/HF chemical laser for a long time, but until now, the precision of this method hasn't been reported.
    氧化剂和燃料的混合状况一直是DF/HF化学激光器发展过程中的重要研究课题,激光诱导碘荧光(LIIF)是研究该问题比较理想的实验方法。
短句来源
    I2 fluorescence spectra were measured by OMA4 in the cavity of a continuous wave (CW) Chemical OxygenIodine Laser (COIL). The transition from I2(B,ν→X,ν") was observed and labeled.
    利用OMA4首次测量了连续波氧碘化学激光器腔内的碘荧光,观察到了I2(B,ν→X,ν")(碘分子的B态到X态跃迁)能级跃迁的谱线并给予了归属。
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The chemicd and kinetic properties of singlet molecular oxygen in liquid phase have attracted much attention of chemists and biochemists owing to its involvement in many chemical and biological processes . This transient entity, however, had evaded direct observation until a decade ago when the 1270nm luminescence from the forbidden tiansition 1gO2(v = O)-2g-O2(v = O) was detected via photosensitization in solution . The success of this measurement was achieved by using germanium photodiode (with much highei...

The chemicd and kinetic properties of singlet molecular oxygen in liquid phase have attracted much attention of chemists and biochemists owing to its involvement in many chemical and biological processes . This transient entity, however, had evaded direct observation until a decade ago when the 1270nm luminescence from the forbidden tiansition 1gO2(v = O)-2g-O2(v = O) was detected via photosensitization in solution . The success of this measurement was achieved by using germanium photodiode (with much highei sensitivity in the infrared legion than in the visible region in contrast to photomultipliei tubes) coupled to fast, high-gain amplifiers. However,Ge photodiodes satisfying the measurement of ultra-weak 1270 nm band of O2 (1 g) are not yet available in our country. Based on the results of Krasnovsky in direct observation of singlet oxygen emission at 1270 nm with red-sensitive PMT, it is of interest to see the feasibility to detect the (1, 0) transition emission of O2(1 g) at 1070 nm by using PMT of S-1 photocathode with a spectral response ranging from 300 to 1150 nm, and a successful demonstration of this proposed approach is described in this paper.Our experimental set-up consists of an argon ion laser as the excitation light source, a quartz cuvette with oxygen-saturated sample solution, a monoch-lomator with a 800 nm cut-off filter and its grating blazed at 1100 nm, a GDB -411 PMT operating in the legion of 300-1150 nm, a lock-in amplifier and a recorder.Photosensitizeis employed weie hematoporphyrin(HP), protoporphyrin (PP), porphyrin C (PC), Rose Bengal (RB) and tetraphenylpoiphin (TPP) . These were dissolved in appropriate solvents including watei, ethanol, pyridine, dimethylsulfoxide, dimethylformamide, tetrahydrofuran, acetone, chloroform, carbon tetrachloride, cyclohexane and benzene. For HP, PP, PC, and RB in above-mentioned polar solvents, the O2 (1 g) (1, 0) band is located at 1105 nm (a shift from 1070 to 1105 nm is brought about resulting from the characteristics of monochromator-detector and a similar situation has been reported in literature ). For TPP in various polar and non-polar solvents, an unresolved band with peak maxima at 1080 nm and 1110 nm has been observed.Since these bands can be quenched by the addition of oxygen quenchers like ascorbic acid, B-carotene or formazan , we believe these can be assigned to be 1 gO2(1,0) bands. The origin responsible for the presence of an additional peak in the band or the splitting of the band can not be definitely explained at the moment. We measured the B-carotene quenching constant of singlet oxygen by meas-uiing the decieasing band intensity at 1105 nm of HP-elhanol vs increasing β-carolene concentrations. A linear Stern-Volmer plot is obtained and the quenching constant determined is 8×109M-1s-1, in good agreement with the value obtained by Krasnovsky using the 1270nm band detection.

从光谱上直接观察了单态氧~1.07μm谱带。血卟啉、原卟啉、卟啉C和四氯四碘荧光素钠等含极性基团的光敏剂与非极性的四苯基卟吩在相同的溶剂中所产生的谱带形状有所不同,测量了β-胡萝卜素对单态氧的猝灭常数,与文献在1.27μm测得的数值一致。

I2 fluorescence spectra were measured by OMA4 in the cavity of a continuous wave (CW) Chemical OxygenIodine Laser (COIL). The transition from I2(B,ν→X,ν") was observed and labeled.

利用OMA4首次测量了连续波氧碘化学激光器腔内的碘荧光,观察到了I2(B,ν→X,ν")(碘分子的B态到X态跃迁)能级跃迁的谱线并给予了归属。

A photoluminescence polymer was prepared using a crylamide as a monomer,a large excess of ethyleneglycol dimethacrylate as the c ross-linking agent,and curcumin as a fluorescence additive. The polymer was gr ound into powder and screened in order to get even powder,whose diameter was fr om 40 to 75 μm. The emission spectra of curcumin in solid powder polymer s how a strong blue shift compared with that of curcumin in C_2H_5OH solution. M eanwhile,rhodamine 6G,tetraiodofluorescein and phloxin have the same phenomeno...

A photoluminescence polymer was prepared using a crylamide as a monomer,a large excess of ethyleneglycol dimethacrylate as the c ross-linking agent,and curcumin as a fluorescence additive. The polymer was gr ound into powder and screened in order to get even powder,whose diameter was fr om 40 to 75 μm. The emission spectra of curcumin in solid powder polymer s how a strong blue shift compared with that of curcumin in C_2H_5OH solution. M eanwhile,rhodamine 6G,tetraiodofluorescein and phloxin have the same phenomeno n of blue shift. Based on these facts,we speculate that the mechanism is probab ly single molecular luminescence because of the limit effect in three dimension space of the polymer. The molecule fluorescence peak was also depending on its e nvironment because the surrounding electron field affected the molecule luminesc ence in polymer.

以丙烯酰胺为功能单体、乙二醇二甲基丙烯酸酯为交联剂 ,在聚合之前的溶液体系中均匀混入荧光分子姜黄素 ,制备了具有光致发光性能的块状聚合物 ,并将此聚合物粉碎为 4 0~ 75 μm直径的粉末。姜黄素在此聚合物中与其在乙醇溶液中相比 ,其荧光发射光谱有明显的蓝移现象。用同样方法制备的含有罗丹明 6G、四碘荧光素、荧光桃红的丙烯酰胺聚合物也有类似的现象 ,初步认为此蓝移现象的机理可能是聚合物的三维空间网状结构对于荧光分子的隔离效应导致其接近于单分子发光所致

 
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