 | Certain Methods for Calculating Thermal Conductivity of Multicomponent Mixtures Involving Polyatomic Gases
Author : Gupta, G.P.;Mathur, S.;Saxena, S.C.
Source : Defence Science Journal ; Vol:18(4) ; 1968 ; pp 195-204
Subject : 536 Thermodynamics
Keywords : Hirschfelder;Curtiss and Bird method;Lindsay Bromley method
Abstract : The assessment of appropriateness of several computing methods for calculating thermal conductivity of mixtures involving polyatomic gases has been investigated by performing calculations on a large number of actual systems where experimental data are available. The procedures are : the linear and reciprocal mixing rules; a combination of these two; a quadratic expression method; three methods of Hirschfelder, Curtiss and Bird; and Lindsay Bromley method. Nineteen different binary gas pairs and six ternary systems have been considered. This work will help in predicting thermal conductivity of mixtures in respect of which directly measured values are not available. |
| | Sulphur Requirements of Hendersonula Toruloidea Nattrass
Author : Srivastava, K.C.
Source : Defence Science Journal ; Vol:18(4) ; 1968 ; pp 205-208
Subject : 58 Botany
Keywords : Malus Sylvestris;Fungus;Rot of Fruits;Ferrous
Abstract : Effects of sulphur compounds on the growth of hendersonula toruloidea Nattrass, causing brown rot of fruits of Malus sylvestris Mill, Has been studied. Nine different sources of sulphur have been used and out of them Ferrous sulphate is found to be best. Zinc sulphate, sodium thiosulphate, potassium persulphate, magnesium sulphate and sodium sulphate support good growth of the organism and are identical sources for this fungus. Ammonium sulphate, potassium sulphate and zinc sulphite support poor growth of the fungus. |
| | Hydromagnetic Oscillatory Flow Past a Non Conducting Infinite Porous Flat with Variable Suction
Author : Pande, Girish Chandra
Source : Defence Science Journal ; Vol:18(4) ; 1968 ; pp 209-214
Subject : 532.542 Fluid Dynamics
Keywords : Laminar Boundary Layer Flow;Skin Friction
Abstract : Unsteady laminar boundary layer flow of a viscous incompressible and electrically conducting fluid past a non conducting infinite porous flat plate with variable suction in the presence of a uniform transverse magnetic field is considered. General formulae for velocity and skin friction are obtained under the assumption that the magnetic Reynolds numbers is small. The dependence of velocity and skin friction on Hartmann number (M) is discussed graphically. |
| | Linear Combinations of Non Central Chi Square Variates
Author : Rao, V.V. Narayana
Source : Defence Science Journal ; Vol:18(4) ; 1968 ; pp 215-226
Subject : 519.2 Statistics
Keywords : Chi squares;Quadratic
Abstract : In this paper the probability density functions for definite and indefinite quadratic forms of non central normal variates have been derived by integrating the joint distribution of sum and difference of two weighted chi-squares. |
| | Optimum Angle of attack for a Rectangular Target
Author : Simha, P.S.
Source : Defence Science Journal ; Vol:18(4) ; 1968 ; pp 227-230
Subject : 623.4.021 Targets;623.4 Armaments and Ballistics
Keywords : Optimum Angles ;Target
Abstract : The optimum angles of attack for a rectangular target along with the necessary conditions are discussed. |
| | Transient Temperature in a Growing Solid
Author : Ahuja, K.L.
Source : Defence Science Journal ; Vol:18(4) ; 1968 ; pp 231-238
Subject : 548 Crystallography;54 Chemistry
Keywords : Law of Cooling;Quadratic Temperature Profile;Heat Balance Integral method
Abstract : Using two parameter quadratic temperature profile in conjunction with the heat balance integral method, approximate solutions for the freezing of a semi infinite slab and inward freezing of a circular cylinder are investigated, with the assumption that the freezing takes place at the surface of the solidifying medium according to Newton's law of cooling. Comparison with the existing solutions on the former problem shows good agreement. |
| | Synthesis of p (Di n propylsulphamyl) Benzoic Acid
Author : Shukla, K.K.;Chaudhry, Govind Rai
Source : Defence Science Journal ; Vol:18(4) ; 1968 ; pp 239-240
Subject : 532.542 Fluid Dynamics
Keywords : Penicillin;Benemid Probenecid;Chronic Gouty Arthritis
Abstract : A process for the synthesis of p-carboxybenzene sulphonylchloride by oxidation of toluene-p-sulphonylchloride as well as toluene-p-sulphonic acid has been developed. p-carboxybenzene sulphonylchloride on condensation with di-n-propylamine yield p-(di-n-propylsulphamyl)-benzoic acid, an uricusuric agent employed in chronic gouty arthritis and used as an antiuric adjuvant known in trade as "Benemid, Probenecid". |
| | Effect of Alcohol Administration on Blood Sugar of Normal and Alcohol Habituated Rates during Acute Cold Exposure
Author : Srivastava, K.K.;Iyer, E.M.
Source : Defence Science Journal ; Vol:18(4) ; 1968 ; pp 241-242
Subject : 612 Physiology
Keywords : Thermoregulatory;Acute Hypoglycemia;Cold Stress
Abstract : Thermoregulatory failure of alcohol administered fasted rates has been studied under acute cold stress. Twentyfour hour fasted rates developed acute hypoglycemia on being given a single oral dose of ethanol (1.3g/kg body weight) during a two hour exposure at -20 degree calcius. Alcohol habituated rates, under similar conditions, more or less maintained their blood sugar concentration. |
| | Incidence of Fungal attack on Aircraft Fuselage
Author : Dayal, H.M.;Uniyal, B.P.;Agarwal, P.N.
Source : Defence Science Journal ; Vol:18(4) ; 1968 ; pp 243-246
Subject : 629.7 Aeronautics;579 MicroBiology
Keywords : Vampire Aircraft;TorulaSp;Fuselage
Abstract : Incidence of fungal attack on the fuselage of a few Vampire aircraft has been observed. The fungus isolated from the infected regions has been tentatively indentified as TorulaSp. Laboratory experiments have revealed that within four weeks this fungus causes about 44 percent loss in the tensile strength of the brich plywood used in the manufacture of the fuselage of the aircraft. |
| | A New Deferred Sentencing Scheme
Author : Chakarvarti, N.K.;Srivastava, T.N.
Source : Defence Science Journal ; Vol:18(4) ; 1968 ; pp 247-251
Subject : 519.2 Statistics;519.8 Operations Research
Keywords : O C Curves
Abstract : A new deferred sentencing scheme resembling double sampling scheme has been suggested from viewpoint of operational and administrative. It is recommended particularly when the inspection is destructive. The O.C. curves of the scheme for two sample sizes of 5 and 10 have been given. |
