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by
S. Suja |
Total Records (
4 ) for
S. Suja |
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P. Karthick
,
Divya Vijayanarayanan
,
S. Suja
,
M. Sridharan
and
K. Jeyadheepan
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Transparent and conductive fluorine doped tin oxide thin films (FTO) were deposited on to thoroughly cleaned glass substrates by nebulized spray pyrolysis technique using di-hydrated tin (II) chloride (SnCl2.2H2O) and ammonium fluoride (NH4F) as the source of tin (Sn) and fluorine (F), respectively. The fluorine concentration was varied from 0.005-0.04 M in the steps of 0.05. The substrate temperature was constantly maintained at 350°C for all depositions. The influence of dopant concentration on the optoelectronic properties of FTO thin films was investigated using X-Ray Diffraction (XRD) analysis, Scanning Electron Micrographs (SEM), Energy Dispersive Analysis of X-rays (EDAX) spectra, optical analysis and electrical measurements. |
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P. Uma Devi
,
D. Devipriya
,
S. Murugan
,
S. Selvi
,
S. Suja
and
P Chinnaswamy
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This study aims to measure Total Antioxidant Capacity (TAC) and
Total Peroxides (TP) in schizophrenia patients with positive, negative
and cognitive symptoms using Ferric Reducing Activity of Plasma (FRAP)
and evaluate its relations with oxidative stress. We measured the plasma
total antioxidant potential and total peroxides in 60 schizophrenia patients
and in 60 well-matched non-schizophrenic control subjects. The association
between the total antioxidative-oxidative potential and the symptoms,
severity of schizophrenia were studied. Total antioxidant capacity/total
peroxide of the clinical samples was measured using latest spectrophotometric
measurement method. Results showed that plasma TAC was found to be lower
in patients with schizophrenia than those of controls. On the contrary,
the patients had high total plasma peroxide levels. Oxidative Stress Index
(OSI) values of the patients were significantly higher than those of controls
(p<0.001). Plasma TAC of each schizophrenia symptoms were significantly
lower than healthy controls (p<0.01 for patients with negative and
cognitive symptoms and p<0.001 for patients with positive symptoms).
When intragroup comparisons were performed, patients with positive symptoms
had significantly very low plasma TAC levels (p<0.001) compared to
other negative (p<0.01) and cognitive subtypes (p<0.01). Plasma
TAC in schizophrenia patients was significantly and inversely correlated
with symptom severity. This study indicates that schizophrenia is associated
with increased oxidative stress, depleted antioxidant status in schizophrenia
subjects and supplementation with more antioxidative supplements could
be considered in treatment. |
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P. Uma Devi
,
S. Murugan
,
S. Suja
,
S. Selvi
,
P. Chinnaswamy
and
E. Vijayanand
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The aim of this study is to evaluate the antibacterial
efficacy of Achyranthes bidentata against seven different microorganisms
such as Escherichia coli, Bacillus subtilin, Proteus vulgaris,
Salmonella typhi, Staphylococcus aureus, Pseudomonas species and
Klebsiella pneumoniae. The values of zone of inhibition were measured and
compared with standard values. All the extracts of root, stem, leaves and
flowers showed high sensitive to Proteus, Escherichia coli,
Bacillus subtilin, Salmonella typhi, Klebsiella pneumoniae, moderate and
less sensitivity to Staphylococcus aureus and Pseudomonas species. The
antiperoxidative effect of various parts of Achyranthes bidentata was also
done. Goat liver was used as the lipid source. This in vitro
evaluation was done by the measurement of thiobarbituric acid reactive
substances (TBARS) in the experimental mixtures of tissue homogenates. The
results suggest that the ethanolic extracts of Achyranthes bidentata root
and flowers possessed significant in vitro lipid peroxidation
inhibiting activities, which is possibly attributed to its free radical
scavenging properties. All the parts of plant extracts were subjected to
qualitative analysis to find out phytoconstituents present in them.
Results showed the presence of alkaloids, flavonoids, phenols, and
steroids and the absence of saponins, glycosides and tannins. |
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S. Selvi
,
P. Uma Devi
,
S. Suja
,
S. Murugan
and
P. Chinnaswamy
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The modulation of the mushroom used now-a-days in the
field of medicine, is the way where this is partly achieved. Among these,
the `antioxidants` which are capable of deactivating the free radicals
follow either enzymatic or non-enzymatic pathways. The aim of this project
is to incorporate the non-enzymatic antioxidant in fresh and dried form of
powered samples of the oyster mushroom (P. leurotus florida) and
milky mushroom (Calocybe indica). This study revealed the presence
of non-enzymatic antioxidant in the selected samples and the striking
feature of this work is to maximize the usage of mushrooms in the powdered
form when there is certain unstable conditions for the usage of mushroom
in the fresh form. |
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