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Kotoky P.,North East Institute of Science and Technology formerly Regional Research Laboratory | Tamuli U.,North East Institute of Science and Technology formerly Regional Research Laboratory | Borah G.C.,North East Institute of Science and Technology formerly Regional Research Laboratory | Baruah M.K.,Nand Nath Saikia College | And 3 more authors.
Fluoride | Year: 2010

The Assam region has been recognized only recently as one of the endemic fluorosis areas in India. Surveys indicate that one-seventh of the 700,000 people in the Karbianglong district of Assam have dental and/or skeletal fluorosis. For this reason, the high concentrations of fluoride (F) in the water resources in various areas of the district are of great concern. In this report we have utilized water F analyses of separate individual areas by subdividing the region into three zones (≤0.10, 1.0-1.5, and ≥1.5 mg F/L) having different potentials for their vulnerability in relation to hazardous effects of F with possible precision and accuracy. These zonation plots should contribute significantly toward planning and developing an improved quality of life for the area and its people. © 2010 The International Society for Fluoride Research Inc. Source


Kotoky R.,North East Institute of Science and Technology formerly Regional Research Laboratory | Pathak M.G.,North East Institute of Science and Technology | Kanjilal P.B.,North East Institute of Science and Technology formerly Regional Research Laboratory
Indian Journal of Natural Products and Resources | Year: 2014

Seeds of six species of genus Litsea Lam. (Family- Lauraceae), viz. L. angustifolia Hook. f., L. cubeba (Lour.) Pers. syn. L. citrata Blume, L. confertiflora (Meissn.) Kost., L. glutinosa (Lour.) C.B. Robins., L. laeta Benth. & Hook. f. and L. lanuginose Nees were collected from 7-10 years old trees and investigated for their oil content and physicochemical properties. Fatty oil content of these species ranged between 19.1 to 58.6% (w/w). Gas chromatographic analysis of the oil indicated that lauric acid is dominant fatty acid; highest in L. laeta (92.0%) and lowest in L. confertifolia (53.0%). Besides lauric acid, seed oil also contain trace amount of myristic acid, stearic acid, oleic acid and linoleic acid. Oleic acid (22.7%) was obtained in L. confertifolia. Lauric acid is a medium chain fatty acid which is considered responsible for many of its health benefits. Hence, the content of lauric acid in these species explores possibility to use these oils as an important source material for nutritional and health aspects. © 2014 National Institute of Science Communication and Information Resources (NISCAIR). All rights reserved. Source


Baruah S.,North East Institute of Science and Technology formerly Regional Research Laboratory | Bora D.K.,North East Institute of Science and Technology formerly Regional Research Laboratory | Biswas R.,North East Institute of Science and Technology formerly Regional Research Laboratory
International Journal of Earth Sciences | Year: 2011

In this study, an attempt is made to determine seismic velocity structure of the crust and upper mantle beneath the Shillong-Mikir Hills Plateau in northeast India region. The principle of the technique is to relate seismic travel times with crustal thickness above the Conrad and Moho discontinuities. Broadband digital waveforms of the local earthquakes make a precise detection of the seismic phases possible that are reflected at these discontinuities. The results show that the Conrad discontinuity is at 18-20 (±0.5) km beneath the Shillong-Mikir Hills Plateau and the Moho discontinuity is at 30 ± 1.0 km beneath the Shillong Plateau and at 35 ± 1.0 km beneath the Mikir Hills. © 2010 Springer-Verlag. Source

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