University of Science and Technology, Meghalaya
Meghalaya, India
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Bordoloi M.,CSIR - Central Electrochemical Research Institute | Bordoloi P.K.,CSIR - Central Electrochemical Research Institute | Bordoloi P.K.,Jorhat Institute of Science and Technology | Dutta P.P.,CSIR - Central Electrochemical Research Institute | And 7 more authors.
Journal of Functional Foods | Year: 2016

Twelve classical edible herbs of Assam were studied, among which, Fagopyrum esculentum, Paederia scandens and Amaranthus viridis showed strong antioxidant potential with high phenolic contents. Rutin and gallic acids were the most abundant phenolic compounds. α-Tocopherol was present in all herbs, while ascorbic acid was found only in some. Leucas aspera and Hydrocotyle sibthorpioides were good sources of both α-tocopherol and ascorbic acid. All twelve herbs were devoid of Pb and Cd. Pouzolzia indica was a rich source of Ca, Fe and Zn. Further, the plants were found to be moderately active against mycotoxin producing fungus Alternaria tenuissima. © 2016 Elsevier Ltd.

Bhuyan S.I.,University of Science and Technology, Meghalaya | Tripathi O.P.,North Eastern Regional Institute of Science and Technology | Khan M.L.,Dr Hari Singh Gour University
Journal of Tropical Agriculture | Year: 2014

N-mineralization, nitrification and ammonification rates were studied in the major land use patterns viz., Jhum, agroforestry, vegetable and millet agro-ecosystems (AES) in East Siang district of Arunachal Pradesh, north-east India. Study was conducted for an annual cycle from June 2011 to May 2012 following standard methodology. N-mineralization showed significant variations between the sites and seasons. Greater amount of N-mineralization was recorded during the rainy season for agroforestry, and winter season for Jhum, vegetable and millet AES. Lowest mineralization rates were found during the spring for Jhum AES and during the rainy season for millet and vegetable AES. Ammonification rate was positively correlated with soil pH, soil organic carbon, NH4 +-N and NO3 --N whereas, nitrification rate was negatively correlated with ammonium and nitrate concentrations which suggest that available nitrogen concentration was not saturated in these systems. © 2014 Kerala Agricultural University. All Rights reserved.

Barman I.,University of Science and Technology, Meghalaya | Barman K.,Barman Diabetes Specialities | Purohit M.M.,Government Ayurvedic College | Choudhury M.,University of Science and Technology, Meghalaya | And 2 more authors.
International Journal of Diabetes in Developing Countries | Year: 2015

The aim of this study is to compare the biochemical stress in persons with diabetes and their anxiety level (mental stress). Normal volunteers and persons with diabetes of either sex between the age of 35 and 55 years were selected for the present study. They were divided into four groups (n = 30). Groups I and III consisted of normal male and female volunteers without diabetes, while groups II and IV consisted of males and females patients with diabetes, respectively. All participants reported early morning to the testing centres, and their blood samples withdrawn to check fasting blood sugar levels (FBS), lipid profile and serum antioxidant entities, respectively. Simultaneously, they were subjected to psychological testing. Their physical parameters were also analysed. The results were analysed using ANOVA. The blood sugar, lipid profile, malondialdehyde (MDA) and anxiety levels of male and female patients with diabetes (groups II and IV) were significantly higher than male and female subjects without diabetes (groups I and III). The postprandial sugar levels and glycosylated haemoglobin (HB1Ac) in females with diabetes were significantly higher than males with diabetes. The serum antioxidant levels in groups II and IV were significantly reduced than in groups I and III. The study concludes that people with diabetes has elevated lipid and reduced serum antioxidant profiles. The anxiety levels in them were also higher, but the anxieties of males with diabetes were significantly higher than females with diabetes. © 2015, Research Society for Study of Diabetes in India.

Kulshrestha M.J.,National Physical Laboratory India | Singh R.,National Physical Laboratory India | Duarah R.,CSIR - Central Electrochemical Research Institute | Rao P.G.,CSIR - Central Electrochemical Research Institute | Rao P.G.,University of Science and Technology, Meghalaya
International Journal of Environmental Studies | Year: 2014

A total of 42 rain water samples were collected for a period of one year, March 2005 to February 2006, at Jorhat, a rural site of North-East India. The pH of the samples varied from 4.1 to 7.1 with a mean 5.5 showing the acidic nature of rainwater with reference to 5.6 (natural pH of rain water due to CO2 equilibrium in the atmosphere). More than 50% of the rain events have been found to be acidic. Mean concentrations of major ions in the rain water followed the order SO > Ca2+ > NH > NO > PO > H+ > HCO > Na+ > Mg2+ > Cl- > K+ > F-. Ca2+, NH and Mg2+ have shown a neutralization factor less than 1, indicating partial neutralization of anions. EFSoil indicated that soil plays a major role in rain water composition. Maximum concentration for most of the ionic species has been observed during winter followed by summer, post-monsoon and monsoon periods, respectively. Occurrence of acid rain events has been observed throughout the year suggesting that the soil is acidic. © 2014 © 2014 Taylor & Francis.

Dey T.,CSIR - Central Electrochemical Research Institute | Gogoi K.,CSIR - Central Electrochemical Research Institute | Unni B.G.,CSIR - Central Electrochemical Research Institute | Kalita M.,CSIR - Central Electrochemical Research Institute | And 5 more authors.
PLoS ONE | Year: 2014

Background: COPD may develop due to variation in the functioning of antioxidants along with smoking and environmental factors in genetically susceptible individuals. Since there are different views about the antioxidants responsible for detoxifying xenobiotic compound in the human body whose functional variation may lead to obstructive disease, this associative study has been taken up between GST gene polymorphism and COPD in populations exposed to coal dusts. Methods: Genotypes of the 70 COPD patients and 85 non COPD patients were determined by PCR based methods followed by multiplex PCR of GSTT1 and GSTM1 genes taking albumin gene as a control. Suspended particulate analyses were determined through the Respirable Dust sampler along with the FTIR analysis of the dust samples from the glass microfiber filters. Results: Dust sampling analysis reveals higher level of respirable suspended particulate matter, non respirable particulate matter, SO2 and NO2 present in air of the study site. FTIR analysis also suggests a higher concentration of organic silicone and aliphatic C-F compounds present in air of the study site and when spirometry was done, low lung function was observed among most of the subjects. GSTM1 null type was significantly associated with low lung function in smoker groups and the presence of at least one active allele (either GSTM1/GSTT1) seemed to have a protective role in the development of COPD. Conclusions: GSTM1 (null genotype) appeared to be a risk factor for lower lung function in smokers living in the vicinity of coal mines. Apart from polluted environment and genetic susceptibility, mixed coal dust exposure rich in organic silicone and aliphatic C-F compounds also appears to be a factor for the low lung function. © 2014 Dey et al.

Mondal S.K.,University of Science and Technology, Meghalaya | Tahbildar H.,Assam Engineering Institute
International Journal of Software Engineering and its Applications | Year: 2014

Regression testing remains one of the most laborious and costly software testing activities in software maintenance. Its laboriousness and costing increases with increasing number of test suits: need to changed re-testing strategy. The strategy should identify and eliminate redundant test cases in order to minimize the test cases from test suites. The aim of regression testing is to reduce the retesting effort and achieve the adequate testing coverage. An important research problem, in this context, is the new developed algorithm is needed to reduce the retesting effort, cost and time without disturbance of thoroughness. The traditional optimal page replacement algorithm is used for managing the virtual memory. Our approach has been showing that the novel optimal page replacement algorithm reducing the redundant test cases during retesting of modified object oriented program. Our testing approach is on unit level. The logic based transitive relationship model achieves the adequate testing coverage to the modified object oriented program. Hybridization of clock page replacement-counting based algorithm is used for making the logic based transition relationship model. An Illustrative example has been presented to establish the effectiveness of our methodology coupled with logic based transitive relationship model. © 2014 SERSC.

Nesa N.,Gauhati University | Azad P.,University of Science and Technology, Meghalaya | Ahmed G.U.,Gauhati University
Pollution Research | Year: 2013

The present study was undertaken to assess the impact of mining activities on quality of soil and water of Tipong, Tirap and Tikak Collieries of Makum Coalfield of Assam. The parameters like soil texture, water holding capacity (WHC), soil moisture content (SMC), pH, conductivity; available P, organic carbon, organic matter, total nitrogen were studied. The highest percentage of clay (10.61) and silt (11.36) in soil was observed in Tirap colliery while highest sand percentage (87.98) in soil was recorded in Tipong colliery. Highest water holding capacity (59.2%), soil moisture content (28.4%) and conductivity (1.03) in soil was recorded in Tipong colliery. The soil and water of Tipong, Tirap and Tikak Collieries of Makum Coalfield was found to be highly acidic in nature. Presence of low pH and reduced nutrient status such as available-phosphorus, nitrogen, organic carbon and matter in the soil confirmed heavy degradation of soil and water and are becoming a matter of serious concern for its adverse affect on the environment of the place. CopyrightCopyright © EM International.

Mondal S.K.,University of Science and Technology, Meghalaya | Tahbildar H.,Assam Engineering Institute
Lecture Notes in Electrical Engineering | Year: 2015

Large library-based regression test cases minimization technique for object-oriented programs has been depicted in this paper. These works have been carried out in three steps. In the first step, the original program is instrumented and executed with test cases. Library is made on the basis of these test cases, coverage of codes, and then the program is modified. In the second step, the modified program is analyzed by latent semantic analysis. It is making the latent semantic matches automatically between users given values and linear combination of its small text objects or variables or database of the software. Therefore, modified code is recorded by latent semantic analysis. Data flow sensitivity and context sensitivity are used for statically and dynamically analyzing the affected and unaffected objects along with the recorded modified codes. After precision data flow analysis, test cases are generated from affected objects with same test cases coverage and affected objects with new test cases coverage. Therefore, redundant test cases are reduced by new opti- mal page replacement algorithm and updated the library along with code coverage records. In the third step, the test cases of former and modified program are collected and sent to the test cases repository. Now the new optimal page replacement algorithm is implemented on the test cases repository and reduced the regression test suites. An Illustrative example has been presented to establish the effectiveness of our methodology. © Springer India 2015.

Barik M.A.,Tezpur University | Barik M.A.,University of Science and Technology, Meghalaya | Sarma M.K.,Tezpur University | Sarma M.K.,Darrang College | And 2 more authors.
Applied Biochemistry and Biotechnology | Year: 2014

Highly sensitive potassium (K)-doped carbon nanotube (CNT) and polypyrrole (PPy) nanocomposite membrane-based enzyme field effect transistor (ENFET) has been fabricated on indium tin oxide (ITO) for detection of cholesterol. P-type graphene has been deposited as substrate on ITO glass electrochemically. N-type graphene has been deposited in source and drain regions. Zirconium dioxide (ZrO2) has been deposited on the channel region as gate insulator. K/PPy/CNT composite has been deposited as sensing membrane on the top of ZrO2 layer; 1 μl of cholesterol oxidase (ChOx) has been immobilized on K/PPy/CNT membrane via physical adsorption technique. The response of K/PPy/CNT/FET has been studied using Agilent 3458A digital multimeter in presence of phosphate buffer saline (PBS) of 50 mM, pH 7.0 and 0.9 % NaCl contained in a glass pot. During measurement, 20 μl cholesterol solutions (0.5 to 25 mM) were poured into the pot through micropipette each time. It has been found that K/PPy/CNT/FET has linearly varied from 0.5 to 20 mM. The sensitivity of this FET has been found to be ~400 μA/mM/mm2 with regression coefficient (r) ~ 0.998. The proposed ENFET has response time of 1 s and stability up to 6 months. The experiment has been repeated 10 times, and only 2.0 % output variation has been observed. The limit of detection (LoD) and Michaelis-Menten constant (Km) were found to be ~1.4 and 2.5 mM, respectively. The results obtained in this work show negligible interference (3.7 %) with uric acid, glucose and urea. © 2014, Springer Science+Business Media New York.

Lokeshwor Y.,University of Science and Technology, Meghalaya | Vishwanath W.,Manipur University
Ichthyological Research | Year: 2015

A new loach, Schistura liyaiensis, is described from the upper reaches of the Barak River at Liyai village, Senapati District, Manipur, India. It is distinguished from its congeners in having a unique combination of characters: 7–9 brown saddles each continuing onto the flank and forming 7–8 broad to slightly narrow bars with a rounded ventral margin, incomplete lateral line, 4 simple and 8½ branched dorsal-fin rays, a black spot at the origin of dorsal fin, a black basicaudal bar, pectoral and pelvic fins sub-acuminate, respectively, with 10 and 7 rays, prominent processus dentiformis. © 2014, The Ichthyological Society of Japan.

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