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ISSN: 0022-4456 |
CODEN: JSIRAC (64) (12) (2005) |
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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
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
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
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
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
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
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
Author-Reader Platform
1012
1013
1016
1020
1021
Announcement
Annual Author Index 2005
Annual Keyword Index 2005
List of referees
Instructions to contributors