Showing papers by "University of Rajasthan published in 1970"
TL;DR: In this article, the reactions of dimethyltin, diethyltin and dibutyltin diisopropoxides with 2-(dimethylamino)- and 2-(diethylamino)ethanol have been studied.
41 citations
TL;DR: In this paper, the thermal conductivity, k, of carbon dioxide is measured by adopting the conductivity column method in the temperature range 100°c to 1075°c and the estimated accuracy of k values is ±2 per cent and these are correlated within an average absolute deviation of 0·5 per cent by the following quadratic polynomial in temperature (T): Here k is in cal cm-1 s-1deg-1 and T in degrees Kelvin.
Abstract: The thermal conductivity, k, of carbon dioxide is measured by adopting the conductivity column method in the temperature range 100°c to 1075°c. The measurements are taken at various pressures between 12·5 and 50·5 cm of mercury where the k values are found to be independent of gas pressure. The estimated accuracy of k values is ±2 per cent and these are correlated within an average absolute deviation of 0·5 per cent by the following quadratic polynomial in temperature (T): Here k is in cal cm-1 s-1deg-1 and T in degrees Kelvin. The present measurements agree well with the existing data. However, the latter have a large scatter and consequently the present work helps in resolving some of the controversies faced by correlators of k data. The theoretically calculated k values are appreciably smaller than the experimental results and this disagreement is attributed to a different value for the diffusion coefficient characterizing the transport of internal energy in comparison to the more familiar one associat...
22 citations
TL;DR: Aminoalkoxy (AAL)silanes have been prepared by alcoholysis of tetraethoxymethyltriethoxy- and dimethyldiethoxysilane with amino alcohols in the presence of the corresponding sodium alcoholates as mentioned in this paper.
20 citations
TL;DR: In this paper, a number of vinyl and phenyl(aminoalkoxy)silanes have been synthesized by silylation of the OH group of alkanolamines with vinyl- and phenyltriethoxysilanes in the presence of metallic sodium.
19 citations
TL;DR: In this article, the reaction of dialkyltin isopropoxides with 1-nitroso-2-naphthol in the presence of aqueous ammonia gave tetraalkyl-1,3-bis(1-nitrogen-2 naphthoxy)distannoxanes.
17 citations
TL;DR: In this article, the reactions between lanthanon isopropoxides and trimethylsilylacetate in different molar ratios in refluxing cyclohexane (M�Gd or Er) were described.
13 citations
TL;DR: In this paper, the reduction of cobalt(II) at the dme has been studied in water and aqueous mixtures of formamide, dimethylformamide and acetonitrile.
12 citations
TL;DR: In this paper, the energy and entropy of the p-chloromandelic acid were found to be 19·8 kcal and ∼ 1 cal mole−1 deg−1 respectively.
10 citations
TL;DR: In this paper, the interaction between copper(II), nickel (II), and zinc(II) nitrilotriacetates with certain bidentate ligands, such as salicylic acid(SA), 5-sulphosalicyric acid (SSA), and 1,2-dihydroxy benzene-3,5-disulphonic acid (Tiron), was investigated.
8 citations
TL;DR: In this article, the longitudinal field penetration into a semi-bounded plasma considering specularly reflecting electrons at the boundary has been studied and the anomalous skin effect has been discussed.
Abstract: Landau studied the longitudinal field penetration into a semi-bounded plasma considering specularly reflecting electrons at the boundary.Kurilko andPopov and thenGorman examined the same problem considering a fraction ‘p’ of all incident electrons reflecting specularly and the remaining portion diffusely. Lastly,Mason treated the same problem at length transverse electromagnetic waves into a semi-bounded plasma has been formulated. We have studied specular reflection of electrons and applied these results to discuss the anomalous skin effect.
4 citations
TL;DR: In this article, the formation of 1:1 derivatives of copper(I) with n-dodecanethiol, toluene-α-thiol, thiophenol, 2-mercaptoethanol, mono-thioglycerol and thiobenzoic acid has been shown by pH-metric titrations.
Abstract: The formation of 1:1 derivatives of copper(I) with n-dodecanethiol, toluene-α-thiol, thiophenol, 2-mercaptoethanol, mono-thioglycerol and thiobenzoic acid has been shown by pH-metric titrations. However, in the case of 2-mercaptoethanol and monothioglycerol, the alkalimetric titrations indicate the possibility of 2:1 (Cu(I):thio-compound) derivatives also. The infrared spectra of some of these compounds have been recorded and based on these studies tentative structures have been proposed.
TL;DR: In this article, the positron lifetimes in alkali halides are calculated assuming the outer shell electrons of the halide ion to form an "electron plasma" which is capable of concentrating around a positron, and calculated annihilation rates are found to be in good agreement with the experimental results.
TL;DR: In this article, the variance and an unbiased estimate of variance for an estimator in T3-class, which is proved to have several good properties by Godambe [2], [3], are derived for sampling with varying probabilities with or without replacement.
Abstract: Horvitz and Thompson [4] introduced three classes of linear estimators for estimation of population characteristics on the basis of a sample drawn with varying probabilities and without replacement. TheirT3-class of estimators does not admit a best unbiased estimator. In this paper, the variance and an unbiased estimate of variance for an estimator in T3-class, which is proved to have several good properties by Godambe [2], [3], are derived for sampling with varying probabilities with or without replacement.
TL;DR: A number of new chloro-substituted alkoxysilanes have been synthesised by the interaction of R n SiCl 4− n (R = H, CH 3, C 2 H 5, C 6 H 5 and CHCH 2 and n = 1, 2, 3) with epichlorohydrin (2,3-epoxypropyl chloride) and ethyl and butyl glycidyl ether as discussed by the authors.
TL;DR: In this article, the effective mass of position in an electron gas is calculated on the basis of electron charge distribution as modified by positron-electron correlations, and it is shown that it is possible to obtain agreement with experimental results without violating the charge sum rule.
TL;DR: In this article, conditions under which rapid and quantitative separation of 234Th occurs by adsorption on Bi(IO3)3, BIO4)3 and Pb(IO 3)2 are described.
Abstract: Conditions are described under which rapid and quantitative separation of 234Th occurs by adsorption on Bi(IO3)3, Bi(IO4)3, Pb(IO3)2. The activity is retained even in presence of considerable amounts of inactive thorium, uranyl and ferric ions. It appears that the activity is adsorbed by counter-ion exchange followed by inhomogeneous mixed crystal formation.
TL;DR: In this article, the dispersion relation for the longitudinal waves in relativistic plasmas was derived, a result which cannot easily be brought in a physically more convenient form.
Abstract: Imre, Buti and others studied the longitudinal waves from the general dispersion relation. Here we have derived the dispersion relation for the longitudinal waves in relativistic plasmas, a result which cannot easily be brought in a physically more convenient form.
TL;DR: In this paper, Monte Carlo calculations of the decays of spallation hyperfragments produced from 1.5 and 3.5 GeV/c K− interactions for various values of the lifetime are presented.
Abstract: The results of the Monte Carlo calculations of the decays of spallation hyperfragments (massA ∼ 20 toA ∼ 90) produced from 1.5 and 3.5 GeV/c K− interactions for various values of the lifetime are presented. The forward/backward asymmetry of the recoils at the decay point with respect to the hyperfragments is used to infer the lifetime. The results of the Monte Carlo calculations are compared with the experimental data of 235 events. It is estimated that the mean lifetime of such hyperfragments is about (2±1)·10−12 s.
01 Dec 1970
TL;DR: In this article, the conductivity of argon seeded with caesium in the temperature range of 2000°K to 2500°K for various values of the density of the seeded material is evaluated.
Abstract: In MHD power generators, usually argon gas is used and to increase its electrical conductivity it is seeded with caesium. In this paper the conductivity of argon seeded with caesium in the temperature range of 2000°K to 2500°K for various values of the density of the seeded material is evaluated.
TL;DR: In this paper, the dispersion relation for the longitudinal wave propagating parallel to the static magnetic field is analyzed under different situations, and it is shown that even in the relativistic case, the wave is free from magnetic effects but it does show the effects in the transverse field.
TL;DR: In this paper, thermal conductivities of ternary mixtures of N2-Ne-H2, O2-N2Ne, and Kr-Ar H2 gas systems were measured at six temperature levels in the range 40-175°C.