| || Studies on the quality of liver extract preparations
Author : Tayal, J.N. ;Srivastava, R.K. ;Zutshi, D.N. ;Mathur, M.C.
Source : Defence Science Journal ; Vol:10(4) ; 1960 ; pp 313-319
Subject : 57.089 Biomedical Sciences ;57 Biological Sciences
Keywords : Liver extract preparations ;Histamine-like substances ;Toxicity test ;Pyrogen test
Abstract : Result of analyses of different brands of Liver Extract have been presented. It has been recommended that in regard to the 'B12' content the higher limit should be fixed at 150 percent of claim. "Total solids' and 'Protein Nitrogen' have not been found to bear any relationship either between themselves or with the contents of 'B12' vitamin and 'histamine like substances' respectively. It has therefore been recommended that these standards should be further investigated. A content of 'histamine-like substances' higher than 50 mcg/ml has been shown to be related with toxicity of the preparation. It has been recommended that standards in relation to the 'toxicity test' and 'limit' of histamine like substances' should be finally arrived at after further collaborative work. A dose of 1.0 ml/Kg rabbit weight has been recommended for Pyrogen Test; a pH range of 5 to 7 has been confirmed.
| || Propellants: the feasibility of their manufacture in India
Author : Srivastava, R.K.
Source : Defence Science Journal ; Vol:13(3) ; 1963 ; pp 47-56
Subject : 662.3 Propellants
Keywords : Defense forces ;Missile force ;Hydrazine fuels
Abstract : In the light of the recent Chinese aggression, the modernization of our defence forces has become a vital necessity. In this paper, one aspect of this problem has been considered in detail viz. the development of an indigenous rocket and missile force. While it is true that many factors e.g. rocket motors, propellants, guidance systems etc. are involved, it is also true that a start in one area will act as an impetus to developments in the other fields. Solid/liquid propellant and oxidizer systems have been considered, the properties of solid and liquid propellants evaluated and on the basis of such comparison, it has been concluded that effort concentrated on the development of liquid propellants will be well expended. Liquid propellant/oxidizer systems have been compared amongst themselves and it has been concluded that the hydrazine fuels oxidized by RFNA/WFNA/IRFNA would represent systems fulfilling the country's immediate military needs best. The availability of raw materials for the manufacture of hydrazine fuels (and also of some solid propellants) has been considered and it is shown that the necessary raw materials are available in sufficient quantities to support an indigenous propellants industry.
| || Two stage conditional repetitive group sampling plan
Author : Gauri Shankar;Sahu, A.K.;Srivastava, R.K.
Source : Defence Science Journal ; Vol:51(3) ; 2001 ; pp 297-302
Subject : 53 Applied Physics
Keywords : Conditional repetitive group sampling plan;Poisson unity value;Graphical evaluation;Repetitive group sampling plan
Abstract : "This paper enlarges the concept of conditional repetitive group sampling plan. The' operating characteristic and average sample number functions of the generalised plan have been derived by graphical evaluation and review technique. Lastly, Poisson unity values have been tabulated to facilitate the operation and construction of the plan. The plan that provides a quick discrimination of good and bad quality lots, could be used for both the process control and goods acceptance or rejection in various stages of production in defence organisations. "
| || A note on the biological assay of heparin
Author : Ghosh, A.K. ;Srivastava, R.K. ;Tanyal, J.N.
Source : Defence Science Journal ; Vol:9(1) ; 1959 ; pp 40-42
Subject : 57 Biological Sciences
Keywords : Heparin ;Biology ;Thrombokinase
Abstract : Abstract not available.
| || Sufficient Conditions for Stability of Completely Confined Fluids in Presence of Magnetic Field
Author : Srivastava, R.K.;Srivastava, K.M.
Source : Defence Science Journal ; Vol:24(3) ; 1974 ; pp 101-106
Subject : 532.542 Fluid Dynamics
Keywords : Electrically conducting;Incompressible fluid;Concentration gradients;Rayleigh number
Abstract : Effect of magnetic field on the electrically conducting incompressible fluid, completely confined in a smooth container of arbitrary shape, has been studied. The temperature gradient, concentration gradients and time independent magnetic field are assumed to act parallel to body force. Two Rayleigh numbers i.e. Modified Rayleigh number M R and critical Rayleigh number Rc have been obtained. It is found that instability occurs if MR