Kokrajhar Government College

Kokrajhar, India

Kokrajhar Government College

Kokrajhar, India
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Ramesha K.P.,National Research Center on Yak | Biswas T.K.,National Research Center on Yak | Jayakumar S.,National Research Center on Yak | Jayakumar S.,Molecular Genetics Laboratory | And 5 more authors.
Indian Journal of Animal Sciences | Year: 2012

Bovine microsatellite markers were used to assess their applicability for population genetic studies in Indian yaks. Out of 30 microsatellite markers tested 27 (90%) successfully amplified yak genomic DNA, of which 23 (85%) were polymorphic with allele number ranging from two to seven. A total of 69 alleles were detected. The Polymorphic Information Content (PIC) values were high (> 0.5) in most of the primers studied. The observed heterozygosity (Ho) in Indian yaks ranged from 0.369 to 0.819, while expected heterozygosity ranged from 0.413 to 0.732. The study validated the usefulness of the cattle microsatellite markers for genetic diversity analysis in yaks.

Swargiari B.N.,Kokrajhar Government College
International Journal of Pharma and Bio Sciences | Year: 2015

α-amylases are most important industrial enzyme and hold a major market share of enzyme sales. They hydrolyze starch molecules to small diverse products as dextrin and progressively smaller molecules of glucose units. α-amylases belong to the family 13(GH-13) of the glycoside hydrolase group of enzymes. Microbial α-amylases have a wide range of applications ranging from starch conversion to pharmaceutical applications. This article highlights on the characteristic features of α-amylase structure, function, family, primary microbial sources and uses of α-amylases in industrial purposes.

Basak S.,Kokrajhar Government College | Karanjai S.,North Bengal University
Journal of Quantitative Spectroscopy and Radiative Transfer | Year: 2010

The equation of transfer for interlocked multiplets in anisotropically scattering atmosphere with planetary phase function has been considered. The Planck function is considered as exponential function of optical depth. The diffusely reflected intensity and emergent intensity in nth approximation has been obtained. Attempt has been made to get exact diffusely reflected intensity and emergent intensity. © 2009 Elsevier Ltd. All rights reserved.

Nath S.K.,Tezpur University | Nath S.K.,Kokrajhar Government College | Dutta R.K.,Tezpur University
Desalination and Water Treatment | Year: 2015

Removal of fluoride from groundwater for drinking purpose and from wastewater is a serious global problem. Though several defluoridation methods are available, each of them has certain merits and demerits. Precipitation and adsorption of fluoride are among the low-cost methods that have been used for years. Calcium materials have certain edges over other types of materials applied for precipitation and adsorption of fluoride. Hydroxyapatite (HAP), quick lime, slack lime, calcium chloride, limestone or calcium carbonate, calcium phosphate, calcium nitrate, calcium sulfate, etc. are among the calcium materials used for fluoride removal. In this paper, the significance of use of different calcium containing materials, their fluoride removal mechanism, and the prospects of application for the purpose have been critically reviewed. Considering easy availability, low cost, and high efficiency, HAP and limestone based processes may be potential clean choices for fluoride removal if the capacity and sludge disposal are adequately addressed. © 2013, Balaban Desalination Publications. All rights reserved.

Bhattacharjee C.,Assam University | Bhattacharjee C.,Kokrajhar Government College | Deb D.,Assam University | Das H.S.,Assam University | And 2 more authors.
Publications of the Astronomical Society of Australia | Year: 2011

Bidirectional reflectance of a surface is defined as the ratio of the scattered radiation at the detector to the incident irradiance as a function of geometry. Accurate knowledge of the bidirectional reflection function for layers composed of discrete, randomly positioned scattering particles is essential for many remote sensing, engineering, and biophysical applications, as well as for different areas of astrophysics. Computations of bidirectional reflection functions for plane parallel particulate layers are usually reduced to solving the radiative transfer equation by the existing techniques. In this work we present our laboratory data on bidirectional reflectance versus phase angle for two sample sizes of alumina, 0.3 and 1m, for the HeNe laser at wavelengths of 632.8nm (red) and 543.5nm (green). The nature of the phase curves of the asteroids depends on the parameters like particle size, composition, porosity, roughness, etc. In the present study we analyze data which are being generated using a single scattering phase function, that is, Mie theory of treating particles as a compact sphere. The well-known Hapke formula, along with different particle phase functions such as Mie and HenyeyGreenstein, will be used to model the laboratory data obtained at the asteroid laboratory of Assam University. © Astronomical Society of Australia 2011.

Basumatary S.K.,University of Lucknow | Narzary D.,Kokrajhar Government College | Brahma M.,Kokrajhar Science College
Palynology | Year: 2016

This paper presents a palynological examination of surface soil samples procured from butterfly mud puddling locations in northeast India and its comparison with forest surface samples from the immediate vicinity. The modern palynodata from different sites reflect a close similarity in the types and frequency of the pollen grains. However, the diversity of pollen taxa in butterfly mud puddle samples was comparatively higher than the forest surface samples. The pollen recovered in both the butterfly mud puddle location and forest surface samples reflects an evergreen forest composed of Dillenia, Elaeocarpus, Litsea, and Syzygium which exactly displays the current vegetation. The presence of cerealia, along with Brassicaceae, and Hibiscus in the butterfly mud puddle samples is suggestive of the human activity in the vicinity. However, the abundance of Lantana and Melastoma pollen in the mud puddle sediments is a strong indication of the conversion of forest vegetation in to open habitat, because these plants are correlated with human occupation. The extra-regional taxa, especially Rhododendron, in the mud puddle sediments are significant and strongly suggestive of butterfly migration from higher altitudes. Evergreen elements, along with ferns and fungal remains, in the palynoassemblage are strongly indicative of high rainfall under warm and humid climatic conditions. Thus, the main aim of this observation was to identify the potential of butterfly mud puddle samples and its comparison with other surface pollen traps in order to strengthen the relationship between modern pollen and vegetation in floristically rich areas of Assam, northeast India. The palynodata from the butterfly mud puddle locations is a useful source of palynological observation which should be considered in future palynological research. © 2016 AASP – The Palynological Society

Gogoi S.,Tezpur University | Nath S.K.,Tezpur University | Nath S.K.,Kokrajhar Government College | Bordoloi S.,Tezpur University | Dutta R.K.,Tezpur University
Journal of Environmental Management | Year: 2015

Fluoride removal from groundwater has been studied by addition of dilute phosphoric acid (PA) to the influent water before limestone treatment through laboratory plug-flow column experiments and bench-scale plug-flow pilot tests. In this PA-enhanced limestone defluoridation (PAELD) technique, fluoride is removed from 0.526mM to 0.50-52.60μM in 3h with near neutral final pH. The presence of PA increases the fluoride removal capacity of limestone to 1.10mg/g compared to 0.39mg/g reported in its absence. The changes in fluoride removal with variation in initial PA concentration, initial fluoride concentration and the final pH have been found to be statistically significant with p<0.05. The estimated recurring cost is US$ ≈0.58/m3 water. Simple scrubbing and rinsing is a preferable method for regeneration of limestone as it is almost equally effective with lime or NaOH. Sorption of fluoride by calcium phosphates produced in situ in the reactor is the dominant mechanism of fluoride removal in the PAELD. Precipitation of CaF2 and sorption of fluoride by the limestone also contribute to the fluoride removal. High efficiency, capacity, safety, environment-friendliness, low cost and simplicity of operation make the PAELD a potential technique for rural application. © 2015 Elsevier Ltd.

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