Based on the study of the characteristics of chemical composition,crystal structure,thermoluminescence,infrared spectrum,and decrepitation temperature analysis of Quartz from Daqingling gold deposit,it is concluded that high content of Cu,Pb,Zn in quartz,the large cell parameter,the large thermoluminescence strenghth,the high decrepigraph and the low infrared absorption frequency are the indicators of high gold-bearing quartz.

Two strong peaks of nitrogen were found on each catalyst, their wave numbers are 2050,2169cm~(-1) for the former and 2095 cm~(-1) ,2157 cm~(-1) for latter respectively.

This paper deals with the intrared features of micas from Qianlishan granite and its derivative veins in Chenxian County, Hunan Province. The result of infrared spectroscopic analysis shows that the micas belong to two different series: Li-Fe series and Li-Al series.

The results showed that in all complexes some bands(ν_(O—H),ν_(N—H),δ_(O—H),δ_(N—H)) were shifted to lower wave number,and some(ν_(C—N),ν_(O—N)) were shifted to higher wave number.

An analysis is made of a method of determining the parameters and coordinates of atmospheric gas clouds radar systems which can measure the attenuation of electromagnetic radiation power at a resonant absorption frequency.

By means of acoustic spectroscopy, it was found that the isotherms of the ultrasound absorption (frequency domain) and ultrasound speed had two dispersion regions.

The results indicated that the absorption cross section at the peak absorption frequency (627.8cm-1) was proportional to the -1/3 power of the fluence.

Shift in the absorption frequency is estimated and found to be small.

Wide frequency bandwidth has been internationally allocated for unlicensed operation around the oxygen absorption frequency at 60 GHz.

A series of ethyl N-substituted carbamates was synthesized by the reaction of ethyl chlorocarbamate with the appropriate amines. These chemicals were evaluated for repellent activity to mosquitoes (Aedes aegypti L.) on the treated backs of guinea pigs. The results indicated that among the N-monosubstituted compounds tested the ethyl N-(2-furyl) carbamate was most active, but in N,N-disubstituted carbamates the ethyl N-phenyl N-formyl carbamate was superior.A rough linear relationship between partition coefficient...

A series of ethyl N-substituted carbamates was synthesized by the reaction of ethyl chlorocarbamate with the appropriate amines. These chemicals were evaluated for repellent activity to mosquitoes (Aedes aegypti L.) on the treated backs of guinea pigs. The results indicated that among the N-monosubstituted compounds tested the ethyl N-(2-furyl) carbamate was most active, but in N,N-disubstituted carbamates the ethyl N-phenyl N-formyl carbamate was superior.A rough linear relationship between partition coefficient and logarithm value of repellent ratio was observed, a lower partition coefficient would correspond to a higher repellent ratio of the compounds tested.There is no correlation between the far infrared spectra and repellent ratio of all compounds tested could be observed.

用氯甲酸乙醇与不同的胺类反应,合成了一系列取代氨基甲酸乙酯类化合物。用埃及伊蚊(Aedes aegypti L.)进行驱避活性测定,所得结果表明,N-一元取代化合物的效果,以K-1023较明显。在N,N-二元取代化合物中,以K-1065的效果最好。一些化合物的分配系数与驱避比值的对数值之间,大致有一条直线关系,分配系数低时,驱避比值大致要高一些。在所测化合物的红外强吸收峰波数与驱避比值,看不出有相关性。

In this paper,we Consider the π-electrons plaed in a one-dimenoisnal potential field with a cosine wave variation of ampllitude Vo along the chain and rising to infinty at the ends.The cosine potetial possesses the period in the sum of the C-C single bond and double bond distance. The crests and troughs of the cosine curve coincide with the longer and shorter bonds,respectively. The Schr(?)dinger equation satisfied with the boundary conditions,has been transformed to the Mathiu's equation expressed in terms...

In this paper,we Consider the π-electrons plaed in a one-dimenoisnal potential field with a cosine wave variation of ampllitude Vo along the chain and rising to infinty at the ends.The cosine potetial possesses the period in the sum of the C-C single bond and double bond distance. The crests and troughs of the cosine curve coincide with the longer and shorter bonds,respectively. The Schr(?)dinger equation satisfied with the boundary conditions,has been transformed to the Mathiu's equation expressed in terms of the same conditions with different forms.On the basis of solving the equation step by step,we have obtained the series expressions of the energy and the wave functions containing one paramater q.Through not too long calculation,the theoretical formulas for the wave number(8)and the oscillator strength of the maximum of the first absorbtion band(11)have been derived out. Good agreement with experimental results of polyenes and biphenyl polyenes for λ_1 and f_1 is obtained by the use of the above mentioned two equations.when q and α equal to zero,the equations(8)and(11)reduce to F E approximation very naturally.Applying this kind of zero order approximation,to the experimental deta of symmetrical polymethines have been given a good explanation as usual.

By means of electronic absorption spectra and molecular orbital energies, the homologous relation between the inorganic compound, nitric acid, and the organic compounds of the homologous series of p-nitrophenol has been studied, Based on the good homologous lines for the wave number of the main absorption peaks as well as the energy difference between the frontier orbitals of these compounds, it may be considered that nitric acid belongs to the homologous series of p-nitrophenol.