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Articles by S. Suja
Total Records ( 4 ) for S. Suja
  P. Karthick , Divya Vijayanarayanan , S. Suja , M. Sridharan and K. Jeyadheepan
  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.
  P. Uma Devi , D. Devipriya , S. Murugan , S. Selvi , S. Suja and P Chinnaswamy
  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.
  P. Uma Devi , S. Murugan , S. Suja , S. Selvi , P. Chinnaswamy and E. Vijayanand
  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.
  S. Selvi , P. Uma Devi , S. Suja , S. Murugan and P. Chinnaswamy
  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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