Journal of Scientific & Industrial Research

VOLUME 61                                                                           NUMBER 2                                                            FEBRUARY 2002

CONTENTS

Review Paper

97

Arcelins¾a potential new age protein
anti-metabolite in legume seed defense against stored product pests

 

S Janarthanan, S Seshadri &

S Ignacimuthu

Paper discusses about arcelins, their molecular characteri­stics, toxic nature to insect pests, and possibilities for further exploitation in insect pest control.

 

 

                                                                               Papers

103

Efficient purification and characterization of neem oil hydrolysing lipase from Aspergillus aculeatus for enrichment of
immuno­modulators

 

 

 

 

 

 

 

 

 

 

Raman P Yadav, Pujya Agarwal &
Shakti N Upadhyay

 

The paper describes the purification and characterization of neem oil hydrolysing lipase from Aspergillus aculeatus which will be useful in enriching the immunomodulatory molecules in neem oil due to specific hydrolysis of neem oil without affecting the active moieties.

110

Preparation and characterization of penta alkyds based on mahua oil

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Sangeeta Tiwari, Mohini Saxena &

S K Tiwari

The study aims at using mahua oil to prepare medium oil length alkyd resins based on pentaerythritol. Fatty acids are separated from the oil by saponification for preparation of the resin. Characterization of the resins is done by IR-spectroscopy. Physico-chemical and film properties of the resins are also evaluated. Resistance against water, chemical and organic solvents is studied. The performance of the resin is compared with a commercial resins.

117

The synthesis of uv-sensitized polymeric
enzyme mimic

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

U Razdan

UV-sensitized polymeric enzyme mimic based on vinyl monomers having cavity for b-phenyl propionic acid based esters of p-nitrophenol is synthesized. The activity of enzyme mimic is found to be inhibited by acylating the active site with cis-cinnnamoyl imidazole. On irradiation it restores inhibited enzyme mimic’s activity which is monitored by studying the hydrolysis profile. On irradiation, cis-cinnamoyl is isomerized to trans-isomer generating free polymeric enzyme mimic. This switching off and on mechanism will be used to light-regulate catalytic activity which has potential application in photoimaging.

123

The effect of cultural conditions on the
production of lipase by fungi

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

T Prabhakar, K Anil Kumar &
P Ellaiah

The important developments in industrial fermentation lead to the utilization of microbial enzymes in different applications, especially hydrolytic enzymes. One of the important enzyme is lipase which hydrolyses fats and oil to fatty acids and glycerol. Selected organisms A. niger, A. flavus, A Japonicus and a fungi isolated from contaminated ghee belonging  to the genus, Aspergillus are fested for the production of lipase on four different media by submerged fermentation technique. Various parameters like carbon source, nitrogen source, pH, temperature, induction by lipids and inoculum level etc., are investigated to optimize the production of lipase.

 

128

Effect of experimental variables on phenol adsorption on activated carbon prepared from coconut husk by single-step steam
pyrolysis: mass transfer process and
equilibrium studies

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

V P Vinod & T S Anirudhan

The adsorption of phenol onto activated carbon is studied, using batch technique under kinetic and equilibrium conditions. The effect of several variables such as initial concentration, temperature, agitation speed, particle size of the adsorbent and pH on phenol removal has been studied. Sorption of phenol depends on the pH of the solution with maximum uptake of 99 per cent occurring at 5.5 and an intial conc. of 25.0 mg/L. Both, external and intraparticular, mass transfer diffusion models have been tested to describe the kinetic data. The sorption mechanism is also discussed. The equilibrium data have been evaluated for compliance with Langmuir and Freundlich isotherm models. Temperature study reveals that the adsorption of phenol is exothermic in nature. Thermodynamic parameters have also been presented to predict the nature of adsorption. Isosteric heat of adsorption is varied with surface coverage. The adsorption data show that spent carbon can be regenerated for further use by hot water treatment.

Conference Report

139

International satellite conference on
chloroplasts: development and function

 

 

M K Singhal

Discusses the current trends and approaches on various aspects related to photosynthesis.

 

 

 

Book Reviews

141

·

The performance of India’s export zones¾a comparison with the Chinese approach

Reviewer: V P Kharbanda

 

·

Special issue of the Indian Journal of Fibre & Textile Research on environmental issues: technology options for textile industry

Reviewer: John Binkley

Sci-Tech Update

145

·

Pharmacogenomics

 

·

Energy emerges from black holes

 

·

802.11

 

·

Developing games with python

 

·

Code for the web

 

·

Nanotechnology projects on the web

 

·

Partners in software solutions for customer relationship management in India.

 

·

New software serves as a user interface

 

·

Biomateria web-site and its contents

 

·

Gene to detect pollutants improved

 

·

Ultrasound diagnosis of valves developed

 

·

A new lamp that clears diseased cells developed

 

·

Alzheimer detected in minutes

 

·

Transgenic foods and warning for biosafety

 

·

Cancer prevention¾better than cure

 

·

Announcements