Showing papers by "University of Rajasthan published in 1976"

Radiative Electron Capture by Multiply-Ionized Chlorine Atoms

Abstract: Radiative electron capture by highly ionized chlorine atoms passing through solid targets has been studied. The energy and angular distribution of the radiation has been measured as well as the cross-section of the process and its energy dependence. There is shown to be agreement between experimental data and theoretical values obtained from a modified Bethe-Salpeter model.

Low Reynolds number flow past a heterogeneous porous sphere using matched asymptotic technique

Abstract: Matched asymptotic expansion procedure as developed by Proudman and Pearson [1] has been utilised to investigate the flow past a heterogeneous porous sphere. The sphere is taken to consist of n + 1 concentric spheres of different permeability. The drag force on the sphere has been obtained and discussed in some particular cases.

Schiff base complexes of silicon(IV)

Abstract: Reactions of silicon tetraacetate with different types ofSchiff bases have been investigated in anhydrous benzene. Monofunctional bidentate, C6H5CH∶NXOH and HORCH∶NC6H5 [whereX=CH2CH2, CH2CH(CH3) or o-C6H4 and R=o-C6H4 or 2,1-C10H6], bifunctional tridentate, o-HOC6H4CH∶NYOH [whereY=CH2CH2 or CH2CH(CH3)] and bifunctional tetradentateSchiff bases, o-HOC6H4C(CH3)∶N(CH2)nN∶C(CH3)C6H4OH-o (wheren=2 or 3) have been shown to yield derivatives of the type, Si(OAc)4−mLm, Si(OAc)4−2nLn′ and Si(OAc)2L″ (wherem=1,2 or 3;n=1 or 2 and HL, H2L′ and H2L″ represent the molecules of monofunctional bidentate, bifunctional tridentate and bifunctional tetradentateSchiff bases resp.) and have been found to be monomeric in boiling benzene. Tentative structures based on IR and in a few cases PMR spectra have been indicated for the resulting derivatives.

Synthesis of 2-iminoxy and 2-diethyl-aminoxy 1,3,2-dioxaarsacyclopentanes and -cyclohexanes

Abstract: 2-Iminoxy and 2-diethylaminoxy-1,3,2-dioxaarsacyclo-pentanes and-cyclohexanes have been synthesised by several routes as volatile liquids. Attempts have been made to throw light on the structures of these derivatives by studies of i. r. and p. m.r. spectra, refractive indices and molecular weights.

Organoboron Compounds II. Synthesis of 2-(N-Alkylsalicylaldimino) Borinanes, -Borolanes and -Boroles

Abstract: Four alternative routes for the synthesis of the title compounds have been investigated. All of the compounds are characterized by elemental analyses, molecular weight determinations and infrared spectros-copic studies.

Schiff base derivatives of lanthanons, La(III), Pr(III), Nd(III) and Sm(III) complexes of bifunctional tetradentateSchiff base

Abstract: Reactions of La(III), Pr(III), Nd(III) or Sm(III) nitrate with bifunctional tetradentateSchiff base, [o-HOC6H4C(CH3): :NCH2]2, having the donor system HO−N−N−OH in 1∶2 molar ratio have been investigated and found to yield new derivatives of the type [Ln(SBH2)2](NO3)3 [whereLn=La(III), Pr(III), Nd(III) or Sm(III) andSBH2=Schiff base molecule, [o-HOC6H4C(CH3) : NCH2]2. On the basis of elemental analyses, conductivity and magnetic measurements and infrared spectra, plausible structures for the resulting complexes have been indicated.

On Construction of a Series of Two-Way Designs:

Abstract: Designs for two-way elimination of heterogeneity are of fundamental importance. Any tlu·ee factor additive design is defined to be a design for two-way elimination of heterogeneity. Methods of construction of these designs have been considered by Shrikhande [1951], Youden [1937], Potthoff [1962], Shrivastava and Anderson [1971], Agrawal [1966(a),(b),(c),(d),(e)], Agrawal and Sharma [1975]. In this paper methods of construction of two-way designs based upon the series of BIB design v = 4t+ 1, b = 2v, 1' = 4t, k = 2t, A = 2t-1 are given, analyses of the designs are included as well. The notation followed are that of AgTawal [1966(a)]. In section 2 some theorems based on the BIB design v = 4t+1 (prime power), b = 2v, 1' = -4t, k = 2t, A= 2t-1 are proved. In section 3 various methods of construction of two-way designs along with their analyses based on these theorems are given. The basic advantage of these methods is that the designs so obtv,ined are either balanced or partially balanced and require lesser number of observations.

Schiff base complexes of dioxouranium(VI), III. Commun.: Dioxouranium(VI) complexes of bibasic tetradentateSchiff bases

Abstract: Bibasic tetradentateSchiff bases having the donor system OH−NX−NX−OH have been shown to form UO2(NO3)2(SBH2) type of derivatives [SBH2 is the molecule of the bibasic tetradentateSchiff bases such as HOC6H4C(R)∶ ∶N(CH2)nN∶C(R)C6H4OH (where R=H or CH3 andn=2 or 3) and HOC(R′)∶CHC(CH3)∶N(CH2)nN∶C(CH3)CH∶ ∶C(R′)OH (where R′=CH3 or C6H5 andn=2 or 3)]. The 1∶1 stoichiometry of these complexes is shown by elemental analysis and conductometric titrations. The molar conductence values in nitrobenzene indicate the non-electrolytic behaviour and the magnetic susceptibility measurements by the Gouy method show these complexes to be diamagnetic.

On effect of chlordane on the blood glucose and of glucose administration on the acute chlordane toxicity in Meriones hurrianae Jerdon, the indian desert gerbil.

Abstract: The effect of 25, 50 and 75 mg/kg body wt. chlordane on the blood glucose level and of glucose administration in chlordane intoxicated Indian desert gerbils are investigated. Chlordane produces hyperglycemia and lowers the glucose tolerance indicating an impairment in the uptake and utilization of glucose in intoxicated gerbils. The possible reasons for these effects are discussed.

On some information measures

Abstract: The directed divergence of type β which generalizes Kullback's directed divergence or Information measure has been characterized by a simple method using a set of four postulates. This generalized directed divergence has a relation with Renyi's Information gain of order β. This relation can be used to give a characterization of Information gain of order β. Finally a theorem regarding the unique derivation of relative Information measure of type (α, β) is stated.

Steady laminar flow of a non-Newtonian fluid with suction or injection and heat transfer through porous parallel discs

Abstract: The problem of heat transfer in the steady flow of an incompressible second order fluid between infinite circular porous discs has been investigated when the flow is entirely due to either suction or injection through, the discs. Taking the suction or injection parameter to be small, the equations of momentum and energy have been solved using the perturbation technique. The temperature distribution has been shown graphically in various cases and compared with the Newtonian fluid. It isinteresting to observe that the temperature in case of the second order fluid is more than that of Newtonian fluid when there is equal suction at the discs (which is in conformity with the observation of Bhatnagar [6]), while this phenomenon is reversed in the case of being equal injection at the discs. Nusselt's number of both the discs has also been obtained. Der Warmetransport in einer stationaren Stromung einer Flussigkeit zweiter Ordnung zwischen unendlichen kreisformigen porosen Scheiben wurde untersucht, wobei die Stromung entweder durch Absaugen oder Einspritzen hervorgerufen wird. Fur kleine Absaug- oder Einspritzparameter wurden die Impuls- und Energiegleichung mit Hilfe der Storungsrechnung gelost. Die Temperaturverteilung wurde fur verschiedene Falle graphisch dargestellt und mit der fur eine Newtonsche Flussigkeit verglichen. Es ist interessant, das die Temperatur, bei gleicher Absaugung an den Scheiben, fur den Fall einer Flussigkeit zweiter Ordnung hoher ist als bei einer Newtonschen Flussigkeit (dies stimmt mit den Ergebnissen von Bhatnagar [6] uberein), wahrend sich das Phanomen bei gleicher Einspritzung an den Scheiben umkehrt. Es wurde auch die Nusselt-Zahl fur beide Scheiben berechnet.

3,4,5-Trihydroxybenzoesäure als Chelatbildner, 1. Mitt.: Praseodym

Abstract: Stability constants of praseodymium chelates of 3,4,5-trihydroxy sodium benzoate are determined by using Bjerrum-Calvin pH titration technique at constant ionic strength 0.1M-sodium perchlorate and at 28±0.1°C. Values calculated by different methods are in good agreement. The study reveals that during complexation only one proton of the ligand molecule is replaced by the metal and oxygen of adjacent phenolic group acts as a coordinating atom. IR and NMR spectral studies of the ligand reveal that one of the OH groups (in meta position to carboxylic group) remains free while two other phenolic groups are involved in intramolecular hydrogen bonding. One water molecule is found attached in crystalline gallic acid.

Schiff Base Complexes of Uranium(V) - PART I Novel Synthesis of U(V) Complexes of Monobasic Bidentate Schiff Bases Derived from Salicylaldehyde and Alkylamines

Abstract: Schiff base complexes of uranium(V) of the type U(OC2H5)5-x(SB)x (where SB represents the anion of the Schiff bases derived from salicylaldehyde and alkylamines of the type o-HOC6H4 CH[dbnd]NR, where R = C2H5, n-C4H7 or n-C4H9 and x = 1, 2 or 3) have been synthesised in almost quantitative yields by the reactions of uranium pentaethoxide with the Schiff base (SBH) in 1:1, 1:2 and 1:3 molar ratios under anhydrous conditions. Complexes of the type U(OC2H5) (SB) and U(OC2H5)3(SB)2 appear to be dimeric, whereas U(OC2H5)2(SB), type of complexes are monomeric in boiling benzene. The infrared spectra of these complexes show coordination of uranium to oxygen as well as nitrogen. The exchange reactions of some of these complexes in presence of excess of tertiary butanol and phenol have also been carried out.

Wave propagation along an arbitrary direction in a bi-Maxwellian plasma

Abstract: Propagation of waves along an arbitrary direction in a bi-Maxwellian plasma is discussed. Exact dispersion relations of the waves are derived and growth rates of instabilities are calculated for various cases.

Mixed ligand derivatives of Th(IV)-EDTA,-CDTA or-DTPA chelate with glycollic and malic acids

Abstract: The interaction of 1∶1 Th(IV)-EDTA,-CDTA or-DTPA chelate with glycollic and malic acids has been investigated potentiometrically and the formation of 1∶1∶1 mixed ligand chelates inferred from the potentiometric curves. The hydrolysis and dimerization constants of the binary chelates and the equilibrium constants of the ternary derivatives have been evaluated at 30±1° and 35±1°C and also the thermodynamic functions, viz. ΔF0, ΔH and ΔS.

Tin(IV) complexes ofSchiff bases derived from salicylaldehyde and aminoalcohols

Abstract: 1∶1 and 1∶2 molar reactions of tin(IV) chloride with theSchiff bases, HO−C6H4CH∶NROH [where R=−(CH2)2−, −CH2−, −CH(CH3)−, −(CH2)3−, and −CH(C2H5)CH2−] have been studied in different stoichiometric ratios and derivatives of the type SnCl4(SBH2) and SnCl4(SBH2)2 (whereSBH2 represents theSchiff base molecule) have been isolated. These have been characterised by elemental analysis, conductivity measurements and I.R. spectral studies.

Mischligandenderivate des 1:1-Th(IV)—DTPA-Chelates mit Milchsäure, Mandelsäure und o-Hydroxynaphthoesäuren

Abstract: Potentiometric studies of the mixed ligand derivatives of 1∶1-Th(IV)—DTPA chelate (whereDTPA=diethylene-triamine pentaacetic acid) with certain secondary ligands, such as lactic, mandelic and o-hydroxynaphthoic acids have been carried out. The pH-titrations of the reaction mixtures containing 1∶1∶1 molar ratio of metal ion toDTPA to secondary ligand have shown the formation of 1∶1∶1 ternary complexes at higher pH (≈8). The equilibrium constants of the resulting mixed complexes have been determined at 30±1°C and μ=0.1 (KNO3) and the order of stability in terms of secondary ligands has been found to be o-hydroxy naphthoic acids>mandelic acid>lactic acid.

Nutritive Role of Different Carbohydrates for the Growth and Survival of Oryzaephilus mercator Fauvel (Coleoptera)

Abstract: Recent investigations on the nutritive role of different carbohydrates for the survival and growth of Oryzaephilus mercator show that fructose, glucose, dextrin and glycogen are of high nutritive value, fructose being even better than natural control diet (wheat + 5% yeast). Maltose, soluble starch, mannitol and sorbitol, although support some growth, are not of as good nutritive value as control diet. All pentoses, sorbose, galactose, lactose, raffinose, potato starch, inulin and dulcitol are of no nutritive value.