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Journal of Scientific & Industrial Research

 

 

 

ISSN: 0022-4456

CODEN: JSIRAC (64) (4)  (2005)

VOLUME 64

NUMBER 4

APRIL  2005

 

CONTENTS

 

Papers

249

Selection and application of advance control systems: PLC, DCS and PC- based system


















 

Sanjeev Gupta & S C Sharma

The paper highlights the basic features and architecture of Programmable Logical Controller (PLC), Distributed Control System (DCS) and Personnel Computer (PC) based system used in almost all industries like paper, chemical, petrochemical, sugar, and fertilizer etc. The factors affecting the selection of PLC, DCS, and PC-based control system are covered in the paper. The comparison between PLC & DCS, PLC & PC-based control system, and PLC, DCS & PC-based control system are presented. Fuzzy based controller and its importance in the industry are also discussed.

IPC Code:  G 06 F 15/04

 

 

 

256

Deformation of outer distributor cone in bulb turbine due to cavitation – A case study














 




 


 


 

 

N Kuppuswamy & R Rudramoorthy

Deformation of outer distributor cone in the bulb turbine due to cavitation is reported. Top and bottom sides of the outer distributor cone enlarged in size from the initial dimensions at the time of erection of the turbine. The left and right hand side dimensions reduced from the erection data. The geometry of outer distributor cone became elliptical after operating machine for 28,000 h. Repairs and reconditions are made on the outer distributor cone to bring the unit into service. The same tendency of deformation is also observed at 28,000 h of working of the machine after the first recondition. The developed approach proved to be very helpful to bulb turbine design engineers in both design and modification of outer distributor cone.

IPC Code: G 10 K 13/00

 

 

262

Assessment of transformer insulation system by evaluating partial discharge and dissolved gas analysis























 

P Verma, M Roy, A Verma & Vimal Bhanot

Partial Discharge (PD) measurement is carried out on the accelerated aged oil-paper samples in specially designed test cell. The accelerated thermal stress is selected from the temperature range 120 to 160°°C and electric stress 1.0 to 2.5 per unit (pu, 1 pu = 1.0 kV). The test cell is taken out after 15, 30, 45 and 60 d to assess the extent of degradation of transformer insulation by performing PD test. The PD results are correlated with dissolved gas analysis and microstructure analysis of aged paper samples.

 

 

 

268

Stability and flow behaviour of barium sulphate suspension and the preparation of stable barium sulphate suspension for medical use



















 

 




 

 

Ahindra Nag

Stability and flow behaviour of concentrated barium sulphate suspension (BSS) was studied in the presence of sodium carboxy methyl cellulose (NaCMC), bentonite and poly vinyl pyrrolidone (PVP). NaCMC (0.2 %) showed maximum viscosity (50 %), maximum sedimentation volume of BSS and maximum (0.4 %) adsorption of NaCMC by BSS. Bentonite and PVP had no significant effect on sedimentation volume of BSS but increased the viscosity . The radiological studies on the X-ray picture of rabbit using BSS (50 %) and NaCMC (0.2 %) exhibited poor contrast of the stomach region. To increase the stability, suspension was mixed with tri sodium citrate (4 %). The X-ray picture of rabbit showed good contrast of the stomach as well as the small intestine region.

IPC Code: A 61 K 49/00

 

 

273

Application of nitrogen as preventive and controlling subsurface fire–Indian context







 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

N K Mohalik, R V K Singh, J Pandey &
V K Singh

The application of liquid/gaseous nitrogen, which inhibits combustion for preventing, controlling and extinguishing mine fires, is now universally accepted for last 50 y. This paper presents the scientific relevance and selective criteria for use of N2 in subsurface fire and reviews experiences of N2 use in Indian coalmines for more than 20 y. The different techniques of N2 production, its advantages and disadvantages are described briefly. A case study of using N2 as a preventive material, in goaf area of working panels of blasting gallery (BG) method of mining is also highlighted.

IPC Code: F 42 B 3/00

 

 

281

Production and optimization of cellulases on pretreated groundnut shell by Aspergillus terreus AV49




Ashish Vyas, Deepak Vyas & K.M. Vyas

Biochemical parameters (effect of alkali of different concentration, substrate concentration, nitrogen sources, effect of Ca++, effect of amino acid) were evaluated to optimize cellulase production by Aspergillus terreus on groundnut shell. 1N NaOH, 5% substrate concentration, 2 mM calcium concentration were optimum for cellulase production. Metheonine, asparagine and tryptophan were found to be stimulatory for cellulase activity.

IPC Code: C 07 C 223/02

 

287

Evaluation of silkmoth (Bombyx mori) allergens in sericultue grainage industries as major pollutants

 








 

B Venkatappa, A N Chandrakala, P Anuradha & B Chatrappa

Allergens from scales and cuticles of abdomen and wing of silk moth, Bombyx mori, causatives of allergic rhinitis have been subjected to solubilization with SDS (2%), urea (8M) and guanidine hydrochloride (6M). Allergens (70%) were extracted and all the solvent extracts contained an approx similar complement of allergens. Allergen composition of abdomen and wing scales differ from one another and both revealed 30-40 polypeptides, on SDS-PAGE separation, of which about 8 in each case make up the major proportion. Major allergens had molecular weights of 14000 to 65000. Proteins extracted from both scales represent a true reflection of the abdominal and wing cuticles and also minor differences were found between the proteins of segment and intersegment cuticle. The isolated allergens were used for immunological analysis.

IPC code: C 02 F 3/02

293

Production of protein rich organic fertilizer from fish scale by a mutant Aspergillus niger AB100__ A media optimization study
























Barnali Basu & Ajit K Banik

Fish scale, the chief waste material of fish processing industries, was enzymatically hydrolyzed by protease of Aspergillus niger AB100 to produce soluble protein for use as organic fertilizer. Optimum inorganic nutrients were found to be: MgSO4, 0.75; K2HPO4, 0.2; and KCl, 0.075%. A. niger AB100 required FeSO4.7H2O (5 μg/ml) and ZnSO4.7H2O (15 μg/ml) for higher amount of protease production and yield. The optimum values for the tested cost-effective nutrients for the maximum protease production were: Defatted soybean-meal, 0.2; Peptone, 0.3; and Corn-steep-liquor, 0.2%. Biomass growth was not related proportionately in every case with that of enzyme production and protein solubilisation but protease production shows a positive correlation with hydrolysis of scale to produce soluble protein.

IPC code: C 05 F 3/00

 

 

299

Quality improvement of paper from bamboo and hardwood furnish through fiber fractionation




















 

Y V Sood, P C Pande, Sanjay Tyagi,
Indranil Payra, Nisha & A G Kulkarni

This study is aimed to improve the quality of paper made from hardwoods (70-80%) and bamboo furnish (20-30%) through fractionation process. The fiber fractionation followed by selective processing of each fraction proved to be a better option to produce paper of improved quality in terms of strength, optical and printing properties. The paper also discusses the machine runnability with fractionated pulp samples based on Wet web properties and fines content of fractionated pulp. This is a good opportunity for mills having multiple paper machines and making different varieties of paper.

IPC Code: D 21 H 17/72

 

 

Report

306

International conference on polymers for advanced technologies (MACRO 2004) — A report

Sanjay Sengupta

 

Book Review

311

TERY Energy Data Directory & yearbook 2003/04

Reviewer: P D Tyagi

 

 

Author-Reader Platform

313

Instructions to contributors

 

 

 

Author Index

 

Anuradha P

287

Mohalik N K

273

Sharma S C

249

 

 

 

 

Singh R V K

273

Banik A K

293

Nag A

268

Singh V K

273

Basu B

293

Nisha

299

Sood Y V

299

Bhanot V

262

 

 

 

 

 

 

Pande P C

299

Tyagi S

299

Chandrakala A N

287

Pandey J

273

 

 

Chatrappa B

287

Payra I

299

Venkatappa B

287

 

 

 

 

Verma A

262

Gupta S

249

Roy M

262

Verma P

262

 

 

Rudramoorthy R

256

Vyas A

281

Kulkarni A G

299

 

 

Vyas D

281

Kuppuswamy N

256

Sengupta S

306

Vyas K M

281

 

 

Keyword Index

 

Additives

268

Exoglucanase

281

Programmable Logical Control

249

Adsorption studies

268

 

 

Protease

293

Allergic rhinitis

287

Fiber fractionation

299

Protein rich organic fertilizer

293

Aspergillus niger AB100

293

Fiber rising

299

 

 

Aspergillus terreus

281

Fish scale

293

Refining

299

 

 

Fluff

299

Rheogram template

268

Bamboo

299

Fuzzy control

249

 

 

Barium sulphate suspension

268

 

 

Scanning electron microscopy

262

Blasting gallery

273

Gastrointestinal tract

268

Silkmoth

287

Bulb turbine

256

Groundnut shell

281

Sodium carboxy methyl cellulose

268

 

 

Guide vanes

256

Spontaneous heating

273

Cavitation

256

 

 

Stability of suspension

268

Cellulase

281

Hardwood

299

 

 

Computer control

249

 

 

Thermal stress

262

Cross reactivity

287

Immune specificity

287

Transformer paper

262

 

 

Inertisation

273

Trisodium citrate

268

DGA

262

Insect allergen

287

 

 

Distributed Control System

249

 

 

Viscosity

268

Distributor cone

256

Liquid nitrogen

273

 

 

 

 

 

 

X-ray studies

268

Electrical stress

262

Partial discharge

262

 

 

Endoglucanase

281

Personnel Computer

249