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Journal of Scientific & Industrial Research

 

 

 

 

ISSN: 0022-4456

CODEN: JSIRAC (62) (9) 857-954 (2003)

VOLUME 62

NUMBER 9

SEPTEMBER 2003

 

 

 

CONTENTS

 

Papers

865

Early identification of innovative and market acceptable technologies — a model for improving technology transfer capabilities of public research institutes








S Rama Mohan  & A Ramakrishna Rao

Presents a systematic approach for early identification of innovative technologies with market acceptability, a research that public research institutes can pursue. The developed approach allows the identification of current and future technologies and a prospective evaluation of their commercial potential, thereby helping its transfer to the market place. The method uses information from a wide spectrum of knowledge sources in structured way and addresses the potential social, environmental, and innovative aspects. It fully encompasses all the different stages required for the identification of emerging technologies and early appraisal of its market acceptability. Also suggests some measures for decision makers in public research institutes for adopting “Technology Push” approach to transfer the developed technologies into the market place.

876

Meso-phase pitches from the residue of oil refinery








R K Maheshwari & N K S Pundhir

The meso-phase pitches are prepared after heating bitumen for preparation of different types of industrial products such as, carbon fibres, high-density graphite, needle coke and many other value added products. The variety of pitches are prepared by polymerization and condensation reactions during heat treatment, depending upon several factors like, rate of heating, duration of heat treatment, atmosphere, rate of flowing gas, pressure and type of vessel. Rheological behaviour indicates that polymerization takes place at higher temperature. Some pitches like, binder pitches, impregnating pitches of very high industrial importance are obtained from meso-phase pitches with due selection of different properties.

883

Impact of pulp and paper mill effluent on lysimetric soil and vegetation used for land treatment

















A Kumar, V Singhal, B D Joshi & J P N Rai

The paper reports on N-mineralization, microbial biomass C and N and microbial respiration of the pulp mill effluent affected lysimetric soils. The pulp and paper mill effluent has high values of BOD, COD, total solids, lignin and cellulose fibres and thus affects the various physico-chemical and microbial properties of soil while using in irrigation.

892

Status of air pollution due to opencast coal mining and its control in Indian context
























Mrinal K Ghose & S R Majee

Discusses the justification of selecting air-monitoring stations and focuses on the methodology adopted for sampling and analysis to evaluate status of air pollution due to OC mines. Four seasons monitoring data reveal that SPM, RPM, SO2 and NOx concentrations at different locations (industrial, residential and sensitive) exceed the permissible limit.

903

Temperature dependence of thermophysical properties of untreated glass oil-palm-fibre reinforced phenolformaldehyde composites























Kedar Singh, N S Saxena & S Thomas

Thermophysical properties such as, effective thermal conductivity (le) and effective thermal diffusive (ce) of untreated reinforced phenolformaldehyde with different weight percentages of oil-palm-fibre (x) are measured simultaneously using the transient plane source (TPS) technique between 80 to 120°C. The composites investigated contain 20, 30 and 50 weight percentage of oil-palm-fibre. The experimental results at different weighted composites show that there is a variation in le and ce in this temperature range. Maximum value of le and ce is observed at 100°C, which lies in the vicinity of glass transition temperature (Tg) of these composites. Efforts are also made to predict the weight percentage of oil-palm-fibre (OPF) and temperature dependence of le and ce through the development of an empirical model. Theoretical predicted values of le and ce for these composites are in agreement with experimental results over the entire range of temperature for investigations.

909

Photocatalytic oxidation of 2,4-dinitro phenol in aqueous titanium dioxide slurries


























B Swarnalatha & Y Anjaneyulu

The   heterogeneous   Photocatalytic   oxidation   of   2,4-dinitrophenol (2,4-DNP) is investigated in aqueous suspensions of TiO2 at the wavelength of 254 nm by using an annular flow type photo-reactor with an 8W low-pressure mercury lamp as a UV-light source. For achieving higher photodegradation, efficiencies of 2,4-DNP, optimized conditions like, irradiation time, initial concentration of 2,4-dinitro phenol, and catalyst load are established. The effect of oxygen supply and the optimum pH for achieving maximum degradation are also investigated. All the experiments are carried out in a batch recirculation mode. Experiments conducted at oxygenated and deoxygenated conditions indicate that the photo-degradation can be carried out through two different mechanisms. Optical density measurement (spectroscopy) is used to study the degradation. At a pH value of 3.5 and 10.5, maximum removal of 99 and 97 per cent is achieved within 3h of irradiation time with an initial concentration of 4 ´ 10-4M.

916

Preparation of inulin from chicory roots




















 



Anil K Gupta, Navdeep Kaur & Narinder Kaur

Different inulin preparations obtained are compared with some of the commercial inulin preparations. Sun-dried roots are as good as the fresh roots for isolation of inulin but roots dried in an oven have lower inulin content due to hydrolysis of fructans during drying.

921

Studies on production of L-3,4-dihydroxy­phenylalanine by clay absorbed tyrosinase






















Neeru Munjal Sharma, Sushil Kumar & Surender K Sawhney

An  enzyme  reactor  for  production  of  l-3,4-dihydroxyphenylalanine (l-DOPA), an antiparkinsonian agent is constructed by using Fuller’s earth adsorbed tyrosinase engulfed in dialysis sac. This permits easy retrieval of the adsorbed enzyme from reaction mixture for processing of fresh batch, thereby preventing the phenomenon of product inhibition to some extent. In this modified batch reactor, 123 mg l-DOPA/L/h is produced.

926

Extraction of hydroxycarboxylic acids with MIBK/toluene solutions of amines

























Ismail Inci & Ahmet Aydin

Reports on the extraction of glycolic, malic, and citric acids by alamine 336 and tri-n-octylamine dissolved in MIBK/toluene mixture (1:1 volume ratio). The effects of amine type and concentration on extraction of hydroxycarboxylic acids by amines are investigated. Formation of acid amine complexes is a dominating factor in the system under consideration. The distribution coefficients and loading factors are calculated and reported.

931

Studies of glass sands occurring around Shankar­garh, district - Allahabad with reference to its economic viability
















Ajai Srivastava, R N Tiwari, Diwakar Mishra & Kshitij Mohan

Deals with the glass sands occurring around Shankargarh, district Allahabad. More than 60 samples representing the vertical and lateral variations of the lithological units are collected from different parts of the area for grain size, mineralogical, and geochemical analyses. The grain size analysis reveals that the majority of the grains are rounded, coarse to fine size grade, well sorted, finely skewed and platykurtic. Mineralogical study of the selected glass sand samples shows the presence of light minerals, i.e., quartz, mica and chert and heavies-rutile, staurolite, tourmaline, and zircon.

Book Review

944

·         Entropy measures, maximum entropy principle and emerging applications
         Reviewer: C P Gupta

Sci-Tech Update

948

·         Cable recycling techniques developed

 

·         Polyphosphazene materials developed

 

·         3-D structure of enzyme involved in Gaucher disease solved

 

·         Easy software developed

 

·         A new optical encoder tiny, accurate, easy to integrate

 

·         Optical encoder product line guide provides highlights and specifications

951

Additions and Corrections

 

 

Author Index

 

Anjaneyulu Y

909

Majee S R

892

Saxena N S

903

Aydin Ahmet

926

Mishra Diwakar

931

Sharma Neeru Munjal

921

Ghose Mrinal K

892

Narinder Kaur

916

Singh Kedar

903

Gupta Anil K

916

Navdeep Kaur

916

Singhal V

883

Inci Ismail

926

Pundhir N K S

876

Srivastava Ajai

931

Joshi B D

883

Rai J P N

883

Sushil Kumar

921

Kshitij Mohan

931

Rama Mohan S

865

Swarnalatha B

909

Kumar A

883

Ramakrishna Rao A

865

Thomas S

903

Maheshwari R K

876

Sawhney Surender K

921

Tiwari R N

931

 
Keyword Index

2,4-Dinitrophenol

909

L-DOPA

921

Photocatalytic oxidation

909

Air pollution

892

Lysimetric soil

883

Public research institutes

865

Amines

926

Market acceptable technologies

865

Pulp effluent

883

Bitumen

876

Meso-phase pitches

876

Research institute

865

Chicory roots

916

MIBK

926

Silica glass

931

Clay absorbed tyrosinase

921

Mixing heights

892

Slurries

909

Composites

903

Oil refinery

876

Technology transfer

865

Economic viability

931

Oil-palm fibre

903

Thermophysical properties

903

Fuller’s earth

921

Oligo-fructosachharides

916

Titanium dioxide slurries

909

Glass sands

931

Opencast coal mining

892

Toluene

926

Hydroxycarboxylic acids

926

Oxidation

909

Tyrosinase

921

Innovation

865

Paper effluent

883

Vegetation

883

Innovative technologies

865

Parkinson disease

921

Ventilation coefficients

892

Inulin

916

Phenol

909

 

 

Land treatment

883

Phenolformaldehyde composites

903