Journal of Scientific & Industrial Research

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ISSN: 0022-4456

CODEN: JSIRAC (64) (12)  (2005)

VOLUME 64

  NUMBER12

DECEMBER 2005

 

CONTENTS

S & T and Industrial Research

949

Performance evaluation of first stage support system of launcher

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

A C Pankaj, Jhankar Basu, S N Shome, P K Mehta & Brijesh Singh

The First Stage Support (FSS) system of a Launcher based on slider – crank mechanism is presented. The unit has to withstand high magnetite of loud and operates at high speed. Study includes dynamic analysis of FSS theoretically to examine effects of different parameters at design stage and experimentation to establish the desired reliability. Unit has been designed, fabricated and its performance has been studied for final installation on launcher.

 

IPC Code: F41B4/00

 

 

957

Study of noise level in railway stations

 

 

 

 

 

 

 

 

 

 

 

V Kanakasabai, G Senthilkumar &
E Chandrasekar

To assess the level of noise in stations, a study was conducted in Chennai Central, Villupuram and Tiruchirapalli railway junctions of Southern Railway. SVAN 943A (Poland make) instrument was used to record observations at vantage points like important platforms, waiting hall and drivers’ rest room. Equivalent continuous sound level (Lcq) near waiting hall on different days was found to be in the range of 52 to 56 dB (A). Average sound pressure level (Lp) in the important platforms and drivers’ rest room was in the range of 52 to 57 dB (A), respectively, which exceeds the noise level category of residential zone prescribed by the Central Pollution Control Board.

IPC Code: E01F8/00

S & T and Industrial Research

960

Piezoceramic-based chlorofluorocarbon-free tunable ultrasonic cleaning system

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

H Muthurajan, H H Kumar & D K Kharat

Use of piezoceramic based ultrasonic cleaning is becoming increasingly popular, since it is free from chlorofluorocarbon (CFC) solvents and removes tough contaminants (yet gentle enough not to damage the delicate substrate), grease, soil, oil, abrasive dust, blast debris, swarf, paint, corrosion etc., from the surface of components either individually or coming off the product lines. The critical component manufacturers and surface treaters are therefore preferably using lead zirconium titanate (PZT) based cleaning systems for intricately shaped components. The significant advantages of this technique are an ability to clean the delicate and complex shapes in a short time without damaging the materials geometry. This paper highlights the design and manufacturing technique of a tunable ultrasonic cleaning system using indigenously developed PZT elements in which the output frequency and duration of cleaning cycle can be adjusted for a particular application.

 

IPC Code: B06B1/06; H04R31/00

965

Fragrant oils from exhausted sandalwood powder and sandal sapwood

 

 

 

 

K H Shankaranarayana, G Ravikumar, A N Rajeevalochan & V G Angadi

Exhausted sandalwood powder and sandal sapwood powder on treatment with 25% HCI followed by steam distillation yielded essential oils, AESP (0.6%) (acidified exhausted sandal powder) and SWA (0.9%) (sapwood acidified). Both oils had almond like note and were strong, heavy and were different in characteristics and composition from those of natural sandal wood oil.

 

 

967

A new role of alumina in polyethylene degradation: A step towards commercial polyethylene recycling

 

 

 
 
 
 
 
 
 
Deepak Pant

 

Degradation of low-density polyethylene (LDPE) to liquid HCs was examined in a 1:1 polymer to alumina weight ratio in the presence of varying amounts of H2SO4. The oil fraction, obtained as a result of degradation, was thoroughly analyzed by GC/MS measurements. Increase in the amount of acid increases the amount of aromatics, with pronounced formation of oxynated aromatics. Alumina, besides providing a thermal background, its usual role in polyethylene degradation, acts as a triphase catalyst by way of bringing the organic phase (melted polymer) and the aqueous phase (H2SO4) in intimate contact to facilitate the process of degradation.

S & T and Industrial Research

973

Development of a new nasal drug delivery system of diazepam with natural mucoadhesive agent from Trigonella foenum-graecum L.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Rimi Datta & A K Bandyopadhyay

A new nasal drug delivery system of diazepam has been developed with a natural mucoadhesive agent from fenugreek (Trigonella foenum-graecum L.). The mucoadhesive strength, viscosity, gelling property and in vitro drug release characteristic through franz-diffusion cell using excised bovine nasal membrane of this natural mucoadhesive agent was found to be higher in comparison to synthetic polymers, hydroxy propyl methyl cellulose (HPMC) and carbopol 934, which are conventionally used for similar purpose. This patient friendly, needle free dosage from may replace the diazepam injections in future.

IPC Code: A61K 6/087

 

978

An extracellular protease with depilation activity from Streptomyces nogalator

 

 

 

 

 

 

 

 

 

 

P Mitra & P K Chakrabartty

 

An extracellular protease-producing actinomycete, Streptomyces nogalator strain Ac 80, was isolated from soil. Mutants of the strain designated as Mt C producing protease of higher (3.0 mg tyrosine liberated/min/mg protein) and Mt L of lower (0.9 mg tyrosine liberated/mim/mg protein) specific activity as compared to that of the wild type (1.8 mg tyrosine liberated/min/mg protein) were selected. Protcolytic activity of the wild type and the mutants correlated with their depilation capacities. Proteolytic enzyme produced by Mt C in solid state fermention was purified to homogeneity, and partially characterized (molecular mass, 66 kDa by SDS- PAGE). It was found to be efficient in depilation of goatskin.

IPC Code: C12N11/02

Energy and Environment

984

Multiple parameter optimization for the maximization of hydrogen production by Enterobacter cloacae DM11

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Debjeet Sen & Debabrata Das

The study deals with the optimization of multiple operational parameters to maximize H2 production using Enterobacter cloacae DM11 grown on MYG (malt extract-yeast extract-glucose) medium in a batch system. A three-factor Box-Behnken factorial design followed by regression analysis and study of contour plots was employed for experimental design and analysis of results. Independent variables (process parameters) were: Inoculum age (5, 10 and 15 h); Initial glucose concentration in growth medium (0.8, 1.0 and 1.2% w/v); and Initial pH of the growth medium (4, 6 and 8). Dependent variable was amount of H2 (in millimoles) produced in 10 h. Optimum values for inoculum age, initial glucose concentration and initial pH were found to be 12.96 h, 1.06% (w/v) and 6.06, respectively.

IPC Code: B01D17/05

991

Polymer-stearic acid blends as form-stable phase change material for thermal energy storage

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Ahmet Sari, Murat Akcay, Mustafa Soylak & Adem Onal

This paper determines thermal properties of blends of polyvinyl alcohol (PVA)-stearic acid (SA) and polyvinyl chloride (PVC)-stearic acid (SA) as form-stable phase change material (PCM) for thermal energy storage (TES). In the blends, SA has a function of storing latent heat of fusion during its solid-liquid phase change when the polymer (PVC or PVA) as a supporting material prevents melted SA leakage because of its structural strength. Therefore, such blend is form-stable and can be used as PCM without encapsulation for passive solar TES applications. The maximum amount of SA in both composites found as high as 50 wt% without any seepage of SA in melted state. Melting temperatures of SA in PVA-SA and PVC-SA blends with form-stable mass combination (50 wt% polymer-50 wt% SA) and the total latent hcats of fusion of the blends were found as 67.4°C and 64.7°C, and 132.68 and 129.34 J/g, respectively by Differential Scanning Calorimetry (DSC). Polymer-stearic acid blends as form-stable composite PCM were found to have great potential for especially solar space and building heating applications in terms of their satisfactory thermal properties and cost-effectivity.

 

IPC Code: C02F1/14

Waste Treatment and Utilization

997

Use of copper slag as construction material in bituminous pavements

 

 

 

 

 

 

N K S Pundhir, C Kamaraj & P K Nanda

Copper Slag (CS) is produced as waste from roasting of copper, in which sulfur is eliminated as SO2. CS was used as fine aggregate (up to 30%) in the design of bituminous mixes like Bituminous Macadam, Dense Bituminous Macadam, Bituminous Concrete and Semi-Dense Bituminous Concrete. Mechanical properties of mix such as Marshall stability, Indirect Tensile Strength was determined. Addition of CS as fine aggregate in various bituminous mixes provides good interlocking and eventually improves volumetric and mechanical properties of bituminous mixes.

 

1003

Spectroscopic and ion exchange studies on modified cotton linters

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

A M A Nada, S S Hamed, S I Soliman & S Abd El Mongy

 

Cation exchange resin was prepared by phosphorylation of cotton linters. The effect of different treatments (alkali or acid) of cotton linters on phosphorylation process was studied. This treatment increases the efficiency of the produced resin toward metal ions uptake (Cu, Fe, Mn, Ni, Pb, Zn). The effect of pH value of metal ion solution on the efficiency of ion exchanger was investigated. The efficiency of the resin toward metal ion uptake was affected by soaking time and weight of resin. Infrared spectroscopy of the cotton linters and its modification was investigated. A new band was seen at wave number 980 and 1194 cm due to the C-O-P band.

Report

1010

National seminar on recent advances in analytical chemistry (RAAC-2004)¾A report

 

P K Sharma

 

Author-Reader Platform

1012

1013

1016

1020

1021

Announcement

Annual Author Index 2005

Annual Keyword Index 2005

List of referees

Instructions to contributors

 

           
                      

 

                     Author Index

Akcay M

991

Angadi V G

965

Bandyopadhyay A K

973

Basu J

949

Chakrabartty P K

978

Chandrasekar E

957

Das D

984

Datta R

973

El Mongy S A

1003

Hamed S S

1003

Kamaraj C

997

Kanakasabai V

957

Kharat D K

960

Kumar H H

960

Mehta P K

949

Mitra P

978

Muthurajan H

960

Nada A M A

1003

Nanda P K

997

Onal A

991

Pankaj A C

949

Pant D

967

Pundhir N K S

997

Rajeevalochan A N

965

Ravikumar G

965

Sari A

991

Sen D

984

Senthilkumar G

957

Shankaranarayana K H

965

Sharma P K

1010

Shome S N

949

Singh B

949

Soliman S I

1003

Soylak M

991

 


 

 


                      Keyword Index

AESP oil

965

Alumina

967

Aqueous HCI distillation

965

Atomic absorption

1003

Bitumen

997

Chlorofluorocarbons

960

Contour plots

984

Copper slag

997

Cotton linter

1003

Depilation

978

Diazepam

973

Dynamics

949

Enterobacter cloacae DM11

984

Enzyme purification

978

Exhausted sandal wood powder

965

Form stable PCM

991

FSS

949

Gas chromatography

984

Hydrogen

984

Indirect Tensile Strength

997

Infrared

1003

Ion exchange

1003

Launcher

949

Lead zirconium titanate

960

Marshall Mix Design

997

Mechanism

949

Nasal drug

973

Noise level

957

Numerical integration

949

Ozone depleting solvents

960

Piezoceramic transducer

960

Polyethylene degradation

967

Polyvinyl alcohol

991

Polyvinyl chloride

991

Proteolytic enzyme

978

Railway station

957

Regression analysis

984

Sandal sapwood

965

Santalum album L

965

Sound

957

Stearic acids

991

Streptomyces nogalator

978

SWA oil

965

Synthetic polymers

973

Thermal energy storage

991

Triphase catalysts

967

Ultrasonic cleaner

960