Journal of Scientific & Industrial Research

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VOLUME 70

NUMBER 9

SEPTEMBER 2011

CONTENTS

Management & Information Technology

751

Reliability based improving model for complicated systems lifetime distribution






















Mojtaba Mahdavi & Mohamad Mahdavi

This paper explores a new method to find the most reliable lifetime distribution function of systems, via an applied heuristic model. In most operating systems, complicity of system obligates high degree of reliability. This model proposes a more appropriate reliability function between the one based on lifetime distribution and another based on relevant extreme value distribution.

756

A cluster based interference mitigation scheme for performance enhancement in IEEE 802.15.4














G M Tamilselvan & A Shanmugam

This study proposed an adaptive transmission power aware cluster scheduling algorithm using multiple channels in a wireless personal area network (WPAN) in the presence of wireless local area network (WLAN) interference. In proposed algorithm, performance metrics [bit error rate (BER), packet error rate (PER), throughput, average end-end delay and average jitter] were measured through Qualnet simulation and it is found effective in an IEEE 802.15.4 cluster-tree network in the presence of multiple IEEE 802.11 interferers.

S & T and Industrial Research

762

Small caliber projectile velocity measurement system based on a single laser source and a single detector




RC Kalonia, Chander Mohan, BB Bahuguna, Thomson Mathew, Manjit Singh & M S Yadav

This study presents development of an inexpensive modular system based on the measurement of time of flight (ToF) of a projectile between two parallel laser screens for velocity measurement of small caliber projectiles and can be used for both indoor and outdoor ranges. System design consists of a single source (laser diode) and a single detector is used to construct two screens. It also provides better velocity measurement accuracy because both screens are generated from same source and have same sensitivity. Velocity measurement accuracy of system is better than 0.08%. A 100 MHz digital oscilloscope is used to measure ToF, which provides 20 ns time base accuracy.

767

Synthesis and Electrochemical Behaviour of 2-[4'-(substituted) sulphonamoylphenyl]hydrazono ethyl-2-cyanoethanoate


















Rajeev Jain, Ramji Lal Yadav,
Shrinarayan Karaiya & Virendra K. Arya

Electrochemical behaviour of 2-[4'-(substituted) sulphonamoyl- phenyl]hydrazono ethyl-2-cyanoethanoate (SHEC) in Britton-Robinson buffers (pH 2.05-10.5) showed that all SHECs gave a single reduction wave at dropping mercury electrode. Cyclic voltammograms exhibited a well defined irreversible cathodic peak at glassy carbon electrode. On the basis of DC, differential pulse polarography and cyclic voltammetry, a reaction mechanism has been suggested. Kinetic parameters [charge transfer coefficient (αna), forward rate constant (k°f,h) and diffusion-coefficient] have been calculated by polarographic and cyclic voltammetric methods. A plausible mechanism has also been suggested on the basis of protons involved in rate determining step and number of electrons involved in reduction process.

 

773

Toxicity evaluation of fungal food colourant from Thermomyces sp. in albino mice







R Poorniammal, S Gunasekaran &
G Ariharasivakumar

This study evaluates acute and sub-acute toxicity on albino mice of yellow pigment isolated from Thermomyces sp. for food application to assess its safety in experimental animals. Oral feeding of Thermomyces sp. (0.5-5.0 g/kg body wt) to adult mice did not show any symptoms of toxicity or mortality of mice. Oral feeding of Thermomyces sp. at 0.25-2.0% level (w/w) for 28 days did not produce any significant changes in body weight gain of experimental mice compared to control mice. There were no significant differences in relative weight of vital organs, hematological parameters and histopathological analysis between experimental and control groups. Thus acute and sub-acute oral feeding of fungal pigment did not produce any toxic effects in male and female mice.

778

Evaluation of different pretreatments to enhance degradation of pine needles by Aspergillus niger F7 under solid state fermentation



Nivedita Sharma, Divya Tandon,
Rakesh Gupta & Sanjeev Kumar

This study presents degradation enhancement of pine needles by Aspergillus niger F7, isolated from soil. A modified alkali pretreatment [NaOH+H2O2 (1M); ratio, 9:1] is found the best among all methods when needles are soaked in this solution for 2 h followed by thorough washing with tap water. Degradation of pine biomass was measured in terms of enzyme (cellulase & xylanase) production, biodegradation index (BI) and hydrolysis (%). There are high enzyme units, BI and hydrolysis% in pretreated material as compared to untreated one.

S & T and Industrial Research

784

Degradation of pesticide by combined photofenton-ozonation process and study of its synergistic effect



















R Rajeswari & S Kanmani

This study presents degradation of pesticide, carbaryl, by combined photofenton-ozonation (PFO) process. Five experimental sets (UV/Fe2+/H2O2, UV/O3, Fe2+/H2O2, O3 and UV/Fe2+/H2O2/O3) were conducted under optimized conditions to prove synergistic effect. Kinetic study revealed increased rate constant in combined process (PFO, 0.0194 min-1) compared to individual process (photofenton, 0.0120 min-1; ozonation, 0.0112 min-1). Presence of inorganic ions such as nitrate indicated fragmentation of active pesticide structure. Complete removal of parent carbaryl and 86% mineralization was achieved at the end of 180 min treatment with combined processes.

Energy and Environment

789

Experimental investigation on Zirconia coated high compression spark ignition engine with ethanol as fuel

























P Lawrence, P Koshy Mathews &
B Deepanraj

This study presents effect of coating on piston, cylinder head, and valves on the performance of a modified four stroke diesel engine using wet ethanol (5% water) as a fuel and emission characteristics of exhaust gas. Zirconia, which has low thermal conductivity, high temperature resistance, chemical inertness, high resistance to erosion, corrosion and high strength, was selected as a coating material for engine components. Engine’s performance was studied for both wet ethanol and diesel with and without Zirconia coating. Also, emissions values were recorded to study the engine’s behavior on emissions.

Energy and Environment

795

Studies on factors influencing fly ash resistivity from electrostatic precipitator with reference to India





















C R Mohanty, A K Swar, B C Meikap &
J N Sahu

Electrostatic precipitator (ESP) performance is a function of electrical resistivity of particles in flue gas. This study presents basic factors that influence fly ash resistivity and ultimately ESP performance. Factors that influence electrical resistivity are coal, sulfur, flue gas moisture, flue gas temperature, and ash chemistry etc. From maintenance perspective of ESP used in thermal power plants in India, analysis could be considered enough for predicting the performance of ESP.

Waste Treatment and Utilization

804

Application of polyaniline for removal of Acid Green 25 from aqueous solutions























Reza Ansari, Samaneh Alaie &
Ali Mohammad-khah

This study presents application of polyaniline coated onto wood sawdust (PAni/SD) for removal of Acid Green 25 (AG 25), a commonly used anionic typical dye in textile industries from aqueous solutions. Adsorption was carried out using batch and fixed bed column systems to study the effects of adsorbent dose, initial dye concentration, pH of test solution, temperature, and contact time. PAni/SD has been found a very efficient adsorbent for adsorption of AG 25.

Author-Reader Platform

810

Instructions to contributors

 

 


Author Index


Alaie S

804

Ansari R

804

Ariharasivakumar G

773

Arya V K

767

 

 

Bahuguna BB

762

 

 

Deepanraj B

789

 

 

Gunasekaran S

773

Gupta R

778

 

 

Jain R

767

 

 

Kalonia RC

762

Kanmani S

784

Karaiya S

767

Kumar S

778

 

 

Lawrence P

789

 

 

Mahdavi Mohamad

751

Mahdavi Mojtaba

751

Mathew T

762

Mathews P K

789

Meikap B C

795

Mohammad-khah A

804

Mohan C

762

Mohanty C R

795

 

 

Poorniammal R

773

 

 

Rajeswari R

784

 

 

Sahu J N

795

Shanmugam A

756

Sharma N

778

Singh M

762

Swar A K

795

 

 

Tamilselvan G M

756

Tandon D

778

 

 

Yadav M S

762

Yadav R L

767


Keyword Index

Acid Green 25 (AG 25)

804

Albino mice

773

 

 

Biodegradation

778

Breakthrough curves

804

 

 

Carbaryl

784

Clustering

756

Coexistence

756

Combined photofenton-ozonation (PFO)

784

Cyclic voltammetry

767

 

 

Data acquisition & processing unit

762

DC polarography (DCP)

767

Diesel engine

789

Differential pulse polarography (DPP)

767

Digital storage oscilloscope

762

 

 

Electrostatic precipitator

795

Ethanol

789

Extreme value

751

 

 

Fly ash

795

Food colourant

773

 

 

Heterogeneous

756

 

 

Knife edge scanning technique

762

Lifetime distribution

751

Lignocellulose

778

 

 

Oral toxicity

773

Ozonation

784

 

 

Packet Error Rate (PER)

756

Photofenton

784

Pigment

773

Polyaniline

804

Pretreatment

778

Projectile velocity

762

 

 

Reliability function

751

Removal

804

Resistivity

795

 

 

Small caliber projectile

762

Solid state fermentation

778

Speed measurement

762

2-[4'-(Substituted)sulphonamoylphenyl] hydrazono ethyl-2-cyanoethanoate (SHEC)

767

Synergistic effect

784

System arrangement

751

 

 

Thermal power plant

795

Thermomyces sp.

773

Time of flight (ToF)

762

 

 

WLAN and WPAN (Zigbee)

756

 

 

Zirconia

789