摘要:

Γ bands of 23 anion-radicals of meta- and para-substituted benzophenones have been assigned and compared to Γ C=O of the parent neutral compounds. Carbonyl frequencies of the anion-radicals (assigned on the basis of data for isotope-labelling compounds) have been found to appear in a 7–8 times wider frequency interval as compared to the frequency range of corresponding neutral compounds, i. e. the structural effects on Γ on the anion-radicals are 7–8 times stronger, compared to those on Γ C=O of the neutral benzophenones.

ISSN:0038-7010    

DOI:10.1080/00387018508062248

出版商:Taylor & Francis Group    

年代:1985

数据来源: Taylor

摘要:

Abstract - The essential oil ofDucrosia ismaelis, Asch. was prepared and its physical (specific gravity, refractive index, and optical rotation) and chemical standards (ester percentage) were determined. The constituents of the oil were identified using TLC, IR, PMR and GLC/Mass spectrometry techniques. Myrecene, N-undecane, α-pinene, n-butylbenzene, γ-cadinene, 3, 5-dimethylstyrene, 5-methylindan, P-menthadiene, cymene, γ-terpinene, sabinene, decanol, and fenchone are the major constituents.

ISSN:0038-7010    

DOI:10.1080/00387018508062249

出版商:Taylor & Francis Group    

年代:1985

数据来源: Taylor

摘要:

A few bands of the C1IIg-A1IIusystem of12C13C molecule have been photographed and five of them have been rotationally analyzed. Molecular constants forv= 0, 1 and 2 in the C1IIgand in A1IIustates have been obtained using a nonlinear least-squares procedure in which all analyzed bands were fitted simultaneosly.

ISSN:0038-7010    

DOI:10.1080/00387018508062250

出版商:Taylor & Francis Group    

年代:1985

数据来源: Taylor

摘要:

In order to derive precise vibrational constants of diatomic molecules the usual procedure needs the origins of rotationally analysed bands. However, the knowledge of these origins is a very hard task, and most commonly only a few bands are known with such a detail. For that reason, we have chosen a procedure suggested by Jenkins and McKellar, that we followed with corresponding branches of the 1-0, 0-0 and 0-1 bands of the B-X system of LaO. For consistency, only measurements reported by Åkerlind were used throughout.

ISSN:0038-7010    

DOI:10.1080/00387018508062251

出版商:Taylor & Francis Group    

年代:1985

数据来源: Taylor

摘要:

Relative Sensitivity Factors (RSFs) for the rare earth elements Ce, Nd, Sm, Eu, Gd, Dy, Er, and Lu have been determined in U3O6-graphite and pure graphite matrices under similar experimental conditions employing Spark Source Mass Spectrometry (SSMS) with electrical detection system in magnetic peak switching mode. The RSF values differ very much when the matrix element (uranium in U3-graphite system or carbon in pure graphite) is the reference, But they show very good agreement when Er, one of the rare earth elements is chosen as internal standard. The literature data on RSF values for the rare earth elements in Y2O3as well as Al matrices are compared with those obtained in the present work. An attempt has been made to explain the similar trend in the RSF values in all these Matrices in terms of the decomposition pattern of the rare earth oxides. An empirical equation relating the RSFs with the decomposition energies of the lanthanide sesquioxides and monoxides has been shown to be useful in computing the RSFs for the lanthanides in various matrices.

ISSN:0038-7010    

DOI:10.1080/00387018508062252

出版商:Taylor & Francis Group    

年代:1985

数据来源: Taylor

摘要:

Graphite furnaces were designed to meet both the requirements of electrostatic sampling of aerosols and of delayed atomization of the sample. The metal lining of the inner surface improves the sensitivity. The carbide coating has no effect when the sample is handled as solid air particulates. High performances were obtained for the atomization of lead in different synthetic and natural matrices; better recoveries were obtained when the sample is directly atomized without chemical pretreatment.

ISSN:0038-7010    

DOI:10.1080/00387018508062253

出版商:Taylor & Francis Group    

年代:1985

数据来源: Taylor

摘要:

The orthogonal functions method is used to correct for interferences in spectrofluorometric analysis. The method has been applied to the determination of orciprenaline sulphate in the presence of oxazepam and guaifenesin in the presence of sulphadiazine. The results obtained are encouraging and suggest that the method could be used for similar problems.

ISSN:0038-7010    

DOI:10.1080/00387018508062254

出版商:Taylor & Francis Group    

年代:1985

数据来源: Taylor

摘要:

Some peculiarities of the crystals' vibrational spectra are studied in this work at non-zero temperatures and occasional fundamental frequency coincidence with the sum or difference of the frequencies of two other vibrations (temperature Fermi-resonance). The anharmonic interaction between the fundamental and the compound tone was shown to cause a renormalization of the spectrum also in the difference frequency region. The dielectric permittivity has been calculated in the temperature Fermi-resonance frequency region. The soft mode interaction with temperature excited difference tones in ferroelectrics has been analysed.

ISSN:0038-7010    

DOI:10.1080/00387018508062255

出版商:Taylor & Francis Group    

年代:1985

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:10.1080/00387018508062247

出版商:Taylor & Francis Group    

年代:1985

数据来源: Taylor