Journal
of Scientific & Industrial Research
Total visitors:2,513 since 04-12-08 |
VOLUME
67
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NUMBER 12
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DECEMBER 2008
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CONTENTS
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Review
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1051 |
New
opportunities for research in coal derived chemicals
P Samuel, S Maity, Samit Khan & S C Roy
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Some specialty chemicals
are monomers for new variety of aromatic engineering plastics. Some of these monomers
can be prepared from 1-4 ring aromatics (alkylated benzenes, biphenyl,
anthracene, phenanthrene, pyrene, phenol and carbazole). Among these, 2,
6-dialkyl naphthalenes, 4, 4’- dialkyl benzenes assume greater importance. By
oxidation of coal and lignite using alkaline group I metal oxide, it is
possible to isolate phenolic acids and naphthalene di-carboxylic acid, which
are also important monomers for engineering plastics. By developing critical
aromatic chemicals from coal, carbo-chemical resources could contribute to
high technology development leading to reduction in the cost of basic
monomers.
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Management &
Information Technology
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1059 |
Design and implementation of mobile telecardiac system
V Thulasi Bai & S K Srivatsa
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This
paper presents design and development of a portable cardiac telemedicine
system that continuously acquires ECG signals
from high-risk cardiac patients who can move around anywhere by a mobile phone
using blue tooth technology. Mobile phone has an in built analyzer to detect
abnormality. In case of panic, mobile phone automatically initiates an
alerting SMS to patient’s caretaker and doctor. It also initiates
transmission of a sample ECG signal using FTP to medical center server via
mobile network.
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S & T and Industrial Research
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1064 |
Wavelet based vector
quantization with treecode vectors for EMG Signal compression
Neelu Jain & Renu Vig
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This paper presents a wavelet-based
vector quantization technique using DCCR (Distortion constrained codebook
replenishment) mechanism for compression of Electromyogram (EMG) signals.
Wavelet coefficients, obtained from EMG signal samples, are arranged to form
tree vectors (TVs), where each vector has a hierarchical tree structure.
Vector quantization is then applied for encoding to TVs, which uses a
pre-calculated codebook. Codebook is created using codebook training
algorithm and is updated dynamically using SPIHT coding strategy. Signal is
decoded using a copy of the same codebook available with encoder. Tests were
performed on EMG records obtained from PGI, Chandigarh. A good quality of reconstructed
signal and sufficient compression is achieved. An average Compression Ratio (CR)
of 20.64:1 at percentage root mean square difference (PRD) of 6.12% is
obtained by this technique.
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1072 |
Analysis of electro
discharge machined surfaces of EN-31 tool steel
H S Payal, Rajesh Choudhary &
Sarabjeet Singh
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In this study, experiments
were performed to determine parameters effecting surface roughness (SR) along
with structural analysis of surfaces with respect to material removal
parameters. Experimental work was conducted on EN-31 tool steel with copper,
brass and graphite as tool electrodes with kerosene oil as dielectric fluid.
The data compiled during experimentation has been used to yield responses in
respect of material removal rate (MRR) and SR. While investigating electric
discharge machining (EDM) surface by micrographs, it was observed that molten
mass has been removed from surface as ligaments and sheets. In some cases, it
is removed as chunks, which being in molten state stuck to surface. All three
specimens machined by different electrodes showed different pattern of HAZs.
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1078 |
Use of range control
charts in determination of variability in surface parallelisms of plates
Huseyin Ankara & Suheyla Yerel
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Statistical Process Control
methods are used to measure and diagnose variability occurring within
processes. In this study, surface parallelisms in plates cut by circle saw
block cutter machine from marble blocks were determined by Range (R) control
charts produced by thickness measurements of plates. Correlation between surface
parallelisms of plates cut was examined. It was suggested that the use of
correlation analysis to determine similarities and differences among plates
cut at different levels was significant for control of machinery and R
control charts.
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S & T and Industrial Research
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1083 |
Effect of
substituents on thermal behavior of some symmetric double schiff’s bases
containing a cardo group
V K Aghera & P H Parsania
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Thermal behavior of
symmetric double schiff’s bases containing cardo group has been studied by
TGA and DSC techniques at 10°C/min in nitrogen atmosphere. DSC transitions,
thermal stability and kinetic parameters are affected by nature and position
of substituents. Schiff’s bases are thermally stable between 173-272°C and
followed either a single step or two steps degradation (fractional or
integral order). Different magnitudes of n, E and A suggested different
degradation mechanisms. A large and negative magnitudes of ∆S*
confirmed highly ordered transition state, while positive magnitudes of ∆S*
confirmed less ordered transition state.
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1088 |
Spectrophotometric
determination of carbosulfan in environmental samples
Aruna Sao, Ajai K Pillai & V K Gupta
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This study presents carbosulfan
determination by a novel rapid, simple, sensitive and an extractive method,
which is based on alkaline hydrolysis of carbosulfan into phenol followed by
coupling with diazotized p- amino acetophenone in alkaline medium. Red brown
dye (lmax 465 nm) can be extractable in 2-methyl butanol, which makes
reaction more sensitive with same lmax. Beer’s law is obeyed between 0.8-5.6 ppm and 0.1-0.6 ppm in
aqueous and extractive system respectively. Molar absorptivity and Sandell’s
sensitivity were found to be 4.46x 104 l mol-1 cm-1
and 0.0085 mg cm-2 respectively.
Method has been satisfactorily applied for carbosulfan determination in
various environmental samples.
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1092 |
Synthesis of coumarins
via Pechmann condensation using inorganic ion exchangers as solid acid
catalysts
Rikesh Joshi & Uma Chudasama
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This study involves
synthesis and characterization of amorphous and crystalline M(IV) phosphates
and tungstates, which are inorganic ion exchangers of the class of
tetravalent metal acid (tma) salts. Presence of protons contained in
structural hydroxyl groups indicates good potential for application in solid
acid catalysis. Catalytic activity of materials has been explored by studying
Pechmann condensation as a model reaction, wherein phenols (resorcinol,
pyrogallol and phloroglucinol) have been treated with methyl acetoacetate to
give coumarins, under solvent free conditions.
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1098 |
Application of
Box-Benhken experimental design for optimization of laccase production by Coriolus
versicolor MTCC138 in solid-state fermentation
Abha Mishra, Sunil Kumar & Sudhir Kumar
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Ligninocellulosic waste and
cyanobacterial bloom was used for production of laccase by Coriolus versicolor MTCC138
using Box- Benhken design method. Empirical model developed through RSM
(Response surface methodology) in terms of effective operational factors of
medium pH, temperature, moisture content, inducers, groundnut shell and
cyanobacterial biomass was found adequate to describe production of laccase by C. versicolor MTCC138 in solid state fermentation.
Correlation coefficient (0.9758) for laccase production indicated a good agreement
between experimental and predicted values. Optimal physico-chemical factors
for laccase production were found to be: cyanobacterial biomass, 2.55 g; pH,
4.94; temperature, 29.96 C; moisture content, 70.96 % and CuSO4,
1.58 mM.
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S & T and Industrial Research
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1108 |
Quality of osmo- vac
dehydrated ripe mango slices influenced by packaging material and storage
temperature
P Suresh Kumar, V R Sagar & Lata
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Study presents preparation of
quality osmo-vac dehydrated mango slices from firm and ripe Amrapali mango.
Slices were prepared after peeling and cutting mango into slices followed by
dehydration in vacuum drier at 40±2°C with an atmospheric pressure of 640
mmHg. Among three packaging materials (200 gauge HDPE, 260 gauge ALPE and 250
gauge COEX), 250 gauge COEX nitrogen packed followed by storage at low
temperature (7±1°C) was found to be best for packing conditions judged at 6
months of storage. It retained higher β- carotene, ascorbic acid, sugar,
rehydration ratio, sensory score and less moisture and non-enzymatic browning
(NEB) in
the product after 6 months.
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1115 |
Effect of liquid
seaweed fertilizer on yield and quality of okra (Abelmoschus esculentus
L.)
S T Zodape,V J Kawarkhe, J S Patolia &
A D Warade
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A field experiment was
conducted in summer of 2006 to study the effect of liquid seaweed fertilizer
(LSF) applied as a foliar spray (conc. 2.5%, 5.0%, 7.5% and 10.0%) on okra (Abelmoschus esculentus
L.). Control plants were sprayed with water.
Yield and nutrition quality of okra fruit got significantly increased
(20.47%) at LSF spray (2.5%).
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Seguruk (Sirnak, Turkey)
asphaltite by flash pyrolysis in a fixed bed reactor with a heating rate 40°C
min-1 at 400-800°C (optimum 550°C) under nitrogen
atmosphere gave: solid residue (char), 67.68; oil, 13.28; and water, 0.99%.
Seguruk asphaltite contained: asphaltene, 28.72; preasphaltene, 10.43;
aliphatics, 52.54; aromatics, 5.05; and polar aromatic compounds, 3.26%. Oil
obtained from asphaltite is mainly aliphatic according to FTIR spectrum.
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Author-Reader Platform
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1123
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Annual Author Index
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1127
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Annual Keyword Index
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1133
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Instructions to contributors
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