Rani, Joseph(OPA (Overseas Publishers Association) N.V., July 23, 1997)
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Abstract:
Selected grades of low density polyethylene (LDPE) polystyrene (PS) were extruded in a
laboratory extruder by varying the feeding rate at different revolutions per minute and
temperatures. The mechanical properties of the extruded plastic sheets were determined.
LDPE shows a marked variation in mechanical properties with feeding rate while PS
shows a marginal change in mechanical properties with feeding rate. However, for both
plastics there is a particular feeding rate in the starved region which results in maximum
mechanical properties.
Chandrasekaran, M; Nagendra, Prabhu G(Elsevier, 1997)
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Abstract:
Process parameters influencing e-glutaminase production by marine Vibrio costicola in solid state fermentation
(SSF) using polystyrene as an inert support were optimised. Maximal enzyme yield (157 U/g dry
substrate) was obtained at 2% (w/w) t:glutamine, 35°C and pH 7.0 after 24 h. Maltose and potassium
dihydrogen phosphate at 1% (w/w) concentration enhanced enzyme yield by 23 and 18%, respectively, while
nitrogen sources had an inhibitory effect. Leachate with high specific activity for glutaminase (4.2 U/mg
protein) and low viscosity (0-966 Ns/m 2) was recovered from the polystyrene SSF system
Description:
Process Biochemistry, Vol. 32, No. 4, pp. 285-289, 1997
Chandrasekaran, M; Nagendra, Prabhu G(Rapid Science Publishers, 1995)
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Abstract:
Polystyrene beads, impregnated with mineral salts/glutamine medium as inert support, were used to produce
L-glutaminase from Vibrio costicola by solid-state fermentation. Maximum enzyme yield, 88 U/g substrate, was
after 36 h. Glucose at 10 g/kg enhanced the enzyme yield by 66%. The support system allowed glutaminase to
be recovered with higher specific activity and lower viscosity than when a wheat-bran system was used
Description:
World Journal of Microbiology & Biotechnology 11,683-684