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Pala E.M.,Shillong College
Journal of Advanced Microscopy Research | Year: 2014

Scanning electron microscopy of skin of Channa gachua from polluted site of the hill stream Umkhrah, showed lesions of the epithelium and dead tissue debris. The other abnormal features of the skin included necrosis of the epidermis and highly eroded skin surface. Transmission Electron Microscopy of Skin in pollution exposed fish, revealed breakage of the epidermis with indistinct arrangement of the layers and loss of cellularity. Epithelial cells showed degenerating nuclear chromatin, a very high degree of distortion of the membrane and the presence of vacuolated cytoplasm. Distorted shape of epidermal nucleus with condensed nuclear chromatin material as well as breakage of nuclear envelope was also seen. The surface micro structural and fine structural abnormalities in the skin of pollution exposed C. gachua are discussed with the help of available literature. Copyright © 2014 American Scientific Publishers All rights reserved. Source


Basu S.,North - Eastern Hill University | Masharing C.,Shillong College | Das B.,Indian Institute of Technology Guwahati
Acta Crystallographica Section E: Structure Reports Online | Year: 2010

In the title compound, [Sn(C6H5)3(C 14H9N2O4)], the Sn atom has a distorted tetra-hedral geometry with one of the carboxylate O atoms and the C atoms from three phenyl groups. The other carboxylate O atom of the benzoate ligand inter-acts weakly with the Sn atom, with an Sn⋯O distance of 2.790 (2) Å, which causes a distortion of the tetra-hedral coordination geometry. Source


Basu S.,North - Eastern Hill University | Basu S.,Jagiellonian University | Masharing C.,Shillong College | Das B.,Indian Institute of Technology Guwahati
Heteroatom Chemistry | Year: 2012

The diorganotin(IV) complexes of methyl 2-{4-hydroxy-3-[(2-hydroxy- phenylimino)-methyl]-phenylazo}-benzoate (H2L) were obtained by the reaction of ortho-aminophenol, R 2SnO (R = Me, nBu, or Ph) and methyl 2-[(E)-(3-formyl-4-hydroxy)diazenyl]benzoate (H2PL 2) in ethanol, which led to diorganotin(IV) compounds of composition [Me 2SnL] 2 (1), nBu 2SnL (2), and Ph 2SnL (3) in good yield. The 1H, 13C, and 119Sn NMR, IR, the mass spectrometry along with elemental analyses allowed establishing the structure of ligand (H2L) and compounds 1-3. In all the three cases, 119Sn chemical shifts are indicators of five-coordinated Sn atoms in a solution state. The crystal structures of ligand H2L and complexes 1 and 2 were determined by a single crystal X-ray diffraction study. In the solid state, the ligand H2L exists as a keto-enamine tautomeric form. The molecular structure of complex 1 in the solid state shows a distorted octahedral geometry around a tin atom due to additional coordination with an oxygen atom from a neighboring molecule leading to a four-membered ring with Sn- O···Sn-O intermolecular coordination, leading to a dimeric species. On the other hand, complex 2 is a monomer with trigonal bipyramidal geometry surrounding the tin atom. Copyright © 2012 Wiley Periodicals, Inc. Source


Dey S.,St Anthonys College | Goswami S.,Shillong College | Goswami M.,Silchar Medical College and Hospital
Turkish Journal of Medical Sciences | Year: 2010

Aim: To examine the prevalence of anaemia in Meghalaya, India, by exploring the 2005-2006 National Family Health Survey (NFHS -3) data. Materials and methods: The study population consisted of 3934 ever-married women of reproductive age (15-49 years) from the state Meghalaya, India, which were taken from the NFHS-3 survey, to explore the predictors responsible for the prevalence of anaemia by using different background characteristics such as age, place of residence, nutritional status, number of children ever born, pregnancy status, educational achievement, and economic status. As a response ariable, anaemia levels were categorised as a dichotomous variable, and the predicted probabilities were worked out through a binary logistic regression model, to assess the contribution of the predictors on anaemia. Results: A logistic regression analysis was performed for some selected predictors related to anaemia levels. All the predictors, except total children ever born, were found to be statistically significant. The mean aemoglobin concentration was evaluated as 117.43 g/L, and 49.6% of the women were found to be anaemic. Women of the age group 20-24 years, are at high risk of anaemia [P = 0.320, O.R. (95% C.I.) = 1.509 (0.671, 3.390)]. Conclusion: Pregnant, under nutritious, and poorest women are at high risk of anaemia. Urban women are also at high risk; however, higher educated women are at low risk of anaemia. The habit of cigarette smoking/pan/bidi/gutka etc. also increases the risk of anaemia. © TÜBİTAK. Source


Pala E.M.,Shillong College | Dey S.,North - Eastern Hill University
Microscopy and Microanalysis | Year: 2016

Conventional and highly sophisticated analytical methods (Cyria et al., 1989; Massar et al., 2012a) were used to analyze micro-structural and micro-analytical aspects of the blood of snake head fish, Channa gachua, exposed to municipal wastes and city garbage. Red (RBC) and white blood cell (WBC) counts and hemhemoglobin content were found to be higher in pollution affected fish as compared with control. Scanning electron microscopy revealed the occurrence of abnormal erythrocytes such as crenated cells, echinocytes, lobopodial projections, membrane internalization, spherocytes, ruptured cells, contracted cells, depression, and uneven elongation of erythrocyte membranes in fish inhabiting the polluted sites. Energy-dispersive X-ray spectroscopy (EDS) revealed the presence of silicon and lead in the RBCs of pollution affected fish. Significance of the study includes the highly sophisticated analytical approach, which revealed the aforementioned micro-structural abnormalities. © Microscopy Society of America 2016. Source

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