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Journal of Scientific & Industrial Research

 

 

ISSN: 0022-4456

CODEN: JSIRAC (63) (7)  (2004)

VOLUME 63

NUMBER 7

JUlY 2004

 

CONTENTS

 

                                    Review Papers

569

Gamma-oryzanol from rice bran oil — A review





















M Patel & S N Naik

The paper describes the production of rice bran oil from rice bran and different methods of extraction of g-oryzanol from rice bran oil. It also reviews the health care properties of g-oryzanol.

IPC Code: Int. Cl.7 : C  08  B  30/04

 

Papers

579

Assessing the status of sealed fire in underground coal mines














 

S K Ray, R P Singh, N Sahay & N K Varma

 

The paper highlights the different aspects of gas sampling in sealed mine fire area. Different fire ratios along with their limitations are also described. Also deals with different methods to determine the explosibility of gas mixtures with suitable examples. Recently obtained field data are also analysed in respect of fire-ratios and explosibility of gas mixture.

IPC Code: Int. Cl.7 : E  21  C  41/18, E  21  C  37/16

592

New initiatives for national S&T manpower development by CSIR















Sushila Khilnani, Bhanu Verma &
Sukumar Mallick

The decline in trend of interest in science in our country is apparent not only in doctoral and post-doctoral research but also extends to the graduate and post-graduate courses in science. Evidently, career in science does not seem to hold fascination of fresh graduates and post-graduates. Thus the first step to create scientific temper among the youth would be to create a belief in the value of science. From here we can take them further to create an interest so profound that they choose to take up science as a vocation. In an attempt to achieve this, CSIR has taken initiative by starting new schemes for attracting students towards science. The new schemes are also discussed in the paper.

 

596

Studies on the properties of carboxymethylated polyvinyl alcohol






















 

G S Mukherjee, N Shukla, R K Singh &
G N Mathur

Polyvinyl alcohol (PVA) is chemically modified to its carboxymethylated form and the products, designated as CPVA are cast into transparent films. It is observed that the mechanical strength of CPVA film is much higher than that of PVA. The wide angle X-ray diffraction (WAXD) pattern shows a higher molecular order in CPVA compared to that in PVA. Influence of water towards CPVA is found to be quite different. Because of higher molecular order, water sorption of CPVA membrane is found to be lower than that of PVA. The interplaner distance for PVA is found to be higher than that of CPVA. DSC profile of PVA and CPVA shows different features; PVA undergoes an exothermic change at a peak exothermic temperature of Tp=76.7°C followed by two distinct endothermic changes. CPVA neither shows any such initial exothermic nor any initial endothermic change unlike showed by PVA but it does exhibit only one distinct endothermic change at trough melting temperature of Tt2=207.3°C. The value of entropy of melting for PVA and CPVA corroborates with their respective WAXD pattern.

IPC Code: Int. Cl.7 : G  01  N  23/207; G  01  N  25/02

603

Studies on the effect of silane coupling agent (2.0 per cent) on the mechanical properties of flyash filled polybutadiene rubber
















Nabil A N Alkadasi, D G Hundiwale &
U R Kapadi

The flyash treated with silane coupling agent (Si-69) is used as a filler in PBR. The properties of composites filled with treated and untreated flyash (separately) are compared. The comparison reveals that the composites with treated flyash shows better reinforcing properties. Flyash treated with silane coupling agent gives greater reinforcement than untreated flyash. The treatment results in enhancement of mechanical properties of composites of the said rubber. The properties under consideration are tensile strength, modulus at 100 and 400 per cent. Young’s modulus, hardness, etc. Tensile strength is improved by 193 per cent while modulus at 400 per cent improves by 700 per cent. Young’s modulus also improves by 170 per cent.

IPC Code: Int. Cl.7 : C  01  B  33/113; C  01  B  31/12

610

Growth kinetics of heavy metal adapted Aspergillus niger during citric acid biosynthesis

















 

 


 

 

A R Angumeenal & D Venkappayya

The tolerance limit of Aspergillus niger NRRL 322 for the heavy metals like, Cd, Pb, Cr and Mo is analyzed. Computation of the kinetic parameters like, growth rate (m), specific growth rate (mmax), the saturation constant for the limiting nutrient (Ks), the growth yield (K), the growth lag (L), and the lag time (Ti) are done and correlated with the microbial metabolism. A detailed study on the growth rate of Aspergillus niger with glucose as the substrate in the presence of transition metals is done and the subsequent excretion of metabolic products associated with the growth  in a batch fermentation are discussed. The growth yield of the strain is observed to be constant with an inorganic source like, Cd. Among the metal ions tried for batch fermentation, trial order of growth yield is found to be Mo > Cr > Pb >Cd and the biosynthesis of citric acid is more with Cd as a stimulant.

IPC Code: Int. Cl.7 : C  12  P  39/00

614

Supported lanthanum cobaltate as vehicular exhaust cleaning catalyst: Oxidation of propylene




















Anil Kumar Sharma

Lanthanum cobaltate binary oxidic species supported on alumina and zirconia are tested for their catalytic activity for propylene oxidation reaction. The synthesized catalyst is supported by dry impregnation of prepared perovskite oxide on alumina or zirconia. The higher activity of zirconia supported catalyst compared to alumina supported catalyst may be attributed to homogeneous and higher dispersion on zirconia, ionic oxygen carrying capacity of zirconia, and larger ionic size of Zr4+ ion for propylene oxidation. The light off temperature, T50 is minimum for 25 per cent LaCoO3/ZrO2 catalyst and 90 per cent propylene oxidation is obtained at 400°C.

IPC Code: Int. Cl.7 : C  12  P  39/00

Report

618

Strategies for development of the herbal drugs in the third world countries — A report


Sharad Srivastava, J K Johri, M R Ahmad & P Pushpangadan

 

Book Review

623

·         IT experience in India — Bridging the digital divide
     Reviewer: K C Garg

Sci-Tech Update

624

·         Sound of DNA: A scientific art

 

·         Design innovation essential to success

 

·         Healing by harps

 

·         Theory of constraints — Viable vision

 

·         Planet CCRMA at home

624

·         Torvals releases Linux Kernel 2.6.0 series

 

·         Synesthesia in art and science

 

·         Space science, technology and the arts

 

·         e2Lite free expert system shell

 

·         JESS — a java expert system shell

 

·         RDFExpert as a web powered expert system

 

·         Twenty-first century color organ

 

·         Artificial synesthesia for synthetic vision

 

·         Motion filed to prevent a corporation from disconnecting intelligent computer under animal cruelty act

 

·         Yamaha’s disklavier pro 2000 piano

 

·         The virtual boehm flute

 

 
AUTHOR INDEX

 

Ahmad M R

618

Mallick Sukumar

592

Sahay N

579

Alkadasi Nabil A N

603

Mathur G N

596

Sharma Anil Kumar

614

Angumeenal A R

610

Mukherjee G S

596

Shukla N

596

 

 

 

 

Singh R K

596

Hundiwale D G

603

Naik S N

569

Singh R P

579

 

 

 

 

Srivastava Sharad

618

Johri J K

618

Patel M

569

 

 

 

 

Pushpangadan P

618

Varma N K

579

Kapadi U R

603

 

 

Venkappayya D

610

Khilnani Sushila

592

Ray S K

579

Verma Bhanu

592

 

 

 

 

 

 

 

 

 

KEYWORD INDEX

 

g-oryzanol

596

Gas sampling

579

Polybutadiene rubber

603

 

 

Growth rate

610

Polyvinyl alcohol

596

Aspergillus niger

610

 

 

 

 

 

 

Herbal drugs

618

Rice bran oil

569

Carboxymethylation

596

 

 

 

 

Catalyst

614

Kinetics

610

S&T manpower

592

Composites

603

Sealed fire

579

CSIR

592

Lanthanum Cobaltate

614

Silane

603

 

 

 

 

Silane coupling agent

603

Drugs

618

Manpower

592

Supported lanthanum cobaltate

614

 

 

Mechanical properties

603

 

 

Edible oil

569

Mechanical strength

596

Thermal analysis

596

Explosibility triangle

579

Metabolism

610

 

 

Metal ions

610

Vehicular exhaust

614

Fire ratios

579

Flyash

603