摘要:

The temperature dependence of the widths and shifts in the energy levels of Eu3+in the luminescence spectra of crystals of europium tris-thenoyl-trifluoroacetonate are measured. The experimental data are interpreted from the point of view of the theory of the spectra of impurity centres in crystals.

ISSN:0038-7010    

DOI:10.1080/00387018108062624

出版商:Taylor & Francis Group    

年代:1981

数据来源: Taylor

摘要:

Liquid Chromatography (LC) has gained acceptance as an analytical tool, and permits separations of mixtures of non-volatile compounds and species that are temperature sensitive.

ISSN:0038-7010    

DOI:10.1080/00387018108062625

出版商:Taylor & Francis Group    

年代:1981

数据来源: Taylor

摘要:

In an inductively coupled plasma [ICP], the flow rate of carrier gas is one of the most significant parameters, while those of coolant and plasma less affect the analytical sensitivity. A sample solution nebulized and transported with the carrier gas passes through the hole, which possesses a lower temperature than the surrounding plasma doughnut1,2. The increase of the nebulizing gas flow rate provides more sample introduction amounts, but the residence time of analyte atoms in the plasma becomes short, which causes the

ISSN:0038-7010    

DOI:10.1080/00387018108062626

出版商:Taylor & Francis Group    

年代:1981

数据来源: Taylor

摘要:

Normal coordinate calculations are widely used by spectroscopists either to check the assignment of the fundamental vibrations or to derive a potential function representing the observational data of the molecules investigated.

ISSN:0038-7010    

DOI:10.1080/00387018108062627

出版商:Taylor & Francis Group    

年代:1981

数据来源: Taylor

摘要:

This work presents a numerical study on the possibility of identifying the length and the diameter of rod-like macromolecules in diluted solution, when the laser light scattered by the solution is analyzed by means of intensity fluctuation spectroscopy (IFS). This study is made by computer-simulation of the second order normalyzed factorial moment, n(2)(T), of the laser light scattered by the macromolecules. The results are presented and discussed.

ISSN:0038-7010    

DOI:10.1080/00387018108062628

出版商:Taylor & Francis Group    

年代:1981

数据来源: Taylor

摘要:

A photoacoustic detection system mainly based on a Fourier transform infrared spectrometer has been constructed and some tentative evaluations of its performances have been made. Infrared photoacoustic spectra of cotton and nylon cloths have been obtained without troublesome sample preparations which are necessary in conventional infrared spectrometry. It can be said that the Fourier transform infrared photoacoustic spectroscopy is useful for the structure elucidation of organic polymers.

ISSN:0038-7010    

DOI:10.1080/00387018108062629

出版商:Taylor & Francis Group    

年代:1981

数据来源: Taylor

摘要:

CNDO/2 calculations are used to predict the hydroxy stretching frequency and intensity of the intramolecular hydrogen bonds in the title compounds. The predictions are compared with experimental data.

ISSN:0038-7010    

DOI:10.1080/00387018108062630

出版商:Taylor & Francis Group    

年代:1981

数据来源: Taylor

摘要:

Positive and negative ion laser desorption (LD) mass spectra of organic acids are characterized by the emission of the quasimolecular ions (M+H)+and (M-H)−. Generation of (M+H)+ions is interpreted as evidence for the occurence of high pressure proton transfer reactions in LD. Fragment ions can be rationalized by loss of stable neutral molecules from quasimolecular ions although decomposition may also be occuring prior to ionization. Features unique to LD, including the detection of pyrolysis products along with ions characteristic of the sample, are discussed in terms of the internal energy distribution in the irradiated microvolume. Negative ion mass spectra of acids are dominated by (M-H)−, while positive ion spectra contain abundant fragment ions, underlining the utility of detecting negative ions for acidic compounds.

ISSN:0038-7010    

DOI:10.1080/00387018108062631

出版商:Taylor & Francis Group    

年代:1981

数据来源: Taylor

ISSN:0038-7010    

DOI:10.1080/00387018108062632

出版商:Taylor & Francis Group    

年代:1981

数据来源: Taylor

摘要:

This is a scanned image of the original Editorial Board page(s) for this issue.

ISSN:0038-7010    

DOI:10.1080/00387018108062623

出版商:Taylor & Francis Group    

年代:1981

数据来源: Taylor