Nagaland, India
Nagaland, India

Nagaland University is a Central University established in the state of Nagaland by an Act of Parliament by the Government of India in 1989. Its headquarters is at Lumami,Zunheboto and other campuses spread across the state, namely at Kohima , Medziphema, and Dimapur . There are 61 colleges affiliated to it, with a total student population of around 24,000. Courses offered are M.A, M.Sc, M.Com, MBA, B.Tech, B.Sc , LL.B, B.Ed, B.Sc, B.A, B.Com, BBA, BCA, B.Sc . Wikipedia.

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Prabhakar M.,Nagaland University
Journal of Chemical and Pharmaceutical Research | Year: 2013

EDTA-Catalyzed a simple, fast and efficient eco-friendly green protocol for the synthesis of dicoumarol derivatives in excellent yields in water at room temperature. This EDTA-catalyzed aqueous reactions of 4-hydroxycoumarin and various aldehydes avoids the use of expansive, corrosive, toxic solvents and provides several advantages such as short reaction time and scalable green synthesis.

Verma A.K.,Nagaland University | Jha M.K.,Indian Institute of Technology Kharagpur
Journal of Hydrologic Engineering | Year: 2015

Watershed models supported by a geographic information system (GIS) and remote sensing data have proven to be vital research tools for the planning and management of land and water resources at watershed or river basin scales. The present study was undertaken with the objective of evaluating a watershed model for the simulation of streamflow and sediment yield in the Baitarani watershed of Eastern India. The watershed model was calibrated and validated using daily rainfall and streamflow data from 1998 to 2005 and sediment yield data from 2002 to 2005. Other input parameters of the watershed model such as digital elevation model, soil map, and land use/land cover map were generated using GIS. The performance of the model was evaluated using salient statistical and graphical indicators. The model calibration and validation results revealed that the watershed model simulated streamflow in the study watershed with a higher level of accuracy at daily [Nash-Sutcliffe efficiency (NSE) = 0.86 and 0.84] and monthly (NSE = 0.95 and 0.93) time steps during both calibration and validation periods. However, the model simulated sediment yields more accurately at the monthly time step (NSE = 0.91 and 0.90) than the daily time step (NSE = 0.62 and 0.59). During the entire period of sediment simulation (2002-2005), the total model-simulated sediment yield was 1,771×103 tons against the observed sediment yield of 1,799×103 tons with a deviation of approximately 1.6%. It is concluded that the watershed model is suitable for the simulation of streamflow and sediment transport in the study area, and it also has potential for adoption in other watersheds of the Baitarani River Basin as well as in other watersheds of India. © 2015 American Society of Civil Engineers.

Gogoi K.,Tezpur University | Saikia J.P.,Tezpur University | Konwar B.K.,Nagaland University
Colloids and Surfaces B: Biointerfaces | Year: 2013

Cellulose from Musa balbisiana was purified. A part of it was dispersed in distilled water using ultrasonication. The silver nanoparticles (SNP) were synthesized in the colloidal cellulose solution and stability of the nanoparticles was tested using UV-Vis spectrophotometer. Further characterization of the composite was done using spectral analysis by Fourier Transform Infrared Spectroscopy (FTIR) to reveal any bond formation between silver nanoparticles with M. balbisiana cellulose. Here we found that cellulose/silver nanoparticle colloid is stable for 29 days and there is no chemical interaction of cellulose with silver nanoparticles. © 2012 Elsevier B.V.

Deb C.R.,Nagaland University | Imchen T.,Nagaland University
Biotechnology | Year: 2010

Micropropagation has been extensively used for the rapid multiplication of many plants species. However, its wider use is restricted often by the high percentage of plant loss or damaged when transferred to ex vitro condition. To acclimatize the micropropagated plants, different workers have employed different approach toward successful establishment of in vitro raised plants under ex vitro condition. In the present study, a successful attempt has been made to acclimatize the tissue culture raised plants which is cost effective compare to other existing hardening technique. Tissue culture raised orchid seedlings were acclimatized and hardened in vitro by using 1/10th liquid MS basal medium subsequently replaced by tap water with chips of charcoal, bricks and decayed wood as an alternate substratum. The newly formed roots under this condition firmly attached to the charcoal chips with the passage of time, similar to velamenous root attach to the trunk of a tree. Charcoal and moss substratum was more suitable than bricks for epiphytic species and decayed woods for terrestrial. The researchers report the novel and efficient one step hardening technique for tissue culture raised orchid seedlings which will reduce the production cost. © 2010 Asian Network for Scientific Information.

Sharma A.,Nagaland University
Indian Journal of Agricultural Research | Year: 2013

The present study was undertaken to study the trends of area, production and productivity of food grain in the northeastern states. The study was based on secondary data from 1980-81 to 2011- 12. The data was collected from several government publications and web site. To analyze the trend of area, production and productivity of food grains in northeastern states, the linear, quadratic and exponential functional forms were used. To fit the trend, linear functional form was used due to its higher R2 value as compared to other two forms. Besides these, compound growth rate, coefficient of variation and instability index was also estimated. The effects of area, productivity and their interaction towards increasing production were also estimated in the present study. The growing of food grain crops was not risky in the northeastern states as revealed by the lower coefficient of variation. The coefficients of variation (CV) of area, production and productivity of food grain crops were less than 0.551 per cent. The instability indices for area, production and productivity for food grain crops in the northeastern states were positive and thereby indicating less risk for growing food grain crops in the region. The increase in production is due to increase in area as well as interaction of area and productivity of food grain crops in the states.

The widespread use of the herbicides for weed control and crop productivity in modern agriculture exert a threat on economically important crops by way of cytological damage to the cells of the crop plant or side effects, if any, induced by the herbicides. In the present communication, author describes the effects of 2,4-D and fsoproturon on chromosomal morphology in mitotic cells of Trittcum aestivum L. The wheat seedlings were treated with range of concentrations (50-1200 ppm) of 2,4-D and Isoproturon for 72 h at room temperature. In the mitotic cells, twelve distinct chromosome structure abnormalities were observed over control. The observed irregularities were stickiness, c-mitosis, multipolar chromosomes with or without spindles, fragments and bridges, lagging chromosomes, unequal distribution of chromosomes, over contracted chromosomes, unoriented chromosomes, star shaped arrangement of the chromosomes, increased cell size and failure of cell plate formation. The abnormalities like stickiness, fragments, bridges, lagging or dysjunction, unequal distribution and over contracted chromosomes meetfrequently. © Allerton Press, Inc., 2010.

Singh A.K.,Nagaland University
Russian Journal of Ecology | Year: 2016

Present study was carried out to determine pollinators’ diversity and their efficiency with modular approach; foraging behaviour, number of loose pollen adhered on their body and number of pollen deposited on the stigma. The observations explicitly indicate that Megachile spp., Xylocopa tenuiscopa, Amegilla zonata and Nomia sp. were true pollinators and out of these, Megachile spp. were key pollinators of pigeonpea. Among megachilids, Megachile lanata was the most efficient pollinator. Sufficient pollination meticulously accomplished in pigeonpea by true pollinators under this agro-ecological region. © 2016, Pleiades Publishing, Ltd.

Objectives: The present study evaluates the therapeutic efficacy of cell suspension of Spirulina platensis (SP) on estrous cycle, fetal development and embryopathy in alloxan (AXN) induced hyperglycemic mice. Materials and Methods: Diabetes was induced by intra-peritoneal administration of AXN. Mice with blood glucose level above 200 mg/dl were divided into Group I (control), Group II (diabetic control), Group III (diabetic control mice fed with SP), and Group IV (control mice fed with SP). Litter counts, estrous cycles, percent survival of litter, and gestation length were recorded. Results: In hyperglycemic mice, a significant (P < 0.05) increase in duration of diestrus (14.48%), estrus (84.21%), and metestrus (164.15%) with concomitant decrease in proestrus phase by 26.13% was recorded when compared with control. Reduction in litter count and survival of litter was 68.67% and 88.38%, respectively, whereas gestation length increased to 14.51% day in diabetic mice, but recovery in these parameters was observed (P < 0.05) when subjected to SP treatment. SP resulted in increased fertility rate from 77.5% to 82.5% and dropped off resorption of the fetus to 33.73% while the survival rate of offspring of diabetic mice went up to 88.89% from 83.61%. Conclusions: These findings suggest that SP is effective in improving the reproductive performance and easing teratogenic effects in diabetic mice and hence warrants further detailed dose-dependent studies to understand its mechanism of action. © 2015 Indian Journal of Pharmacology Published by Wolters Kluwer - Medknow.

Deb C.R.,Nagaland University | Pongener A.,Nagaland University
Journal of Plant Biochemistry and Biotechnology | Year: 2011

Cymbidium aloifolium is a multipurpose economically important epiphytic orchid grows on tree trunk in the primary forests. Its population in natural habitat is downsized due to different anthropogenic activities. A successful attempt was made for asymbiotic immature embryo culture and in vitro mass scale production of plantlets. For successful culture initiation seed pods of various developmental ages, various nutrient media, sucrose concentrations, different quality and quantity of plant growth regulators were surveyed. Immature embryos of 9 months after pollination was successfully germinated on MS medium containing sucrose (2%) (w/v) and α-naphthalene acetic acid (NAA) and benzyl adenine (BA) (3 and 6 μM respectively in combination) within 45 days of culture where 90% germination was recorded. The germinated seeds formed PLBs on the optimum germination medium within two passages. The protocorm like bodies (PLBs) differentiated into rooted plantlets within 3 weeks on regeneration medium containing sucrose (3%), caseinhydrolysate (0.1 gl-1) and BA 3 μM. Amongst the three media studied, optimum regeneration was registered on MS medium where as many as 12 shoot buds developed per explants per subculture of 4 weeks duration. The well rooted plantlets of 6-7 cm long with 3-4 roots were hardened in vitro 3-4 weeks before they were transferred to potting mix. The potted plants were exposed to full sunlight periodically and watered at regular interval. About 70-80% transplants survived after 2 months of potting. © Society for Plant Biochemistry and Biotechnology 2011.

Singh A.K.,Nagaland University
Indian Journal of Traditional Knowledge | Year: 2016

In Nagaland, three species (Tetragonula irridipenis, Tetragonula laviceps and Lophotrigona canifrons) of stingless bees were observed; however, most of the beekeepers were rearing T. irridipenis. Stingless bees were found to prefer low light, high humidity, and stenothermal climatic conditions with diverse abundant flora. The traditional colony capture method of terrestrial and subterranean stingless bee was logical and practical and shows immense scope to introduce precise method with scientific interventions. Usually log hive and rectangular bee boxes were used by Naga beekeepers, although a few have tried to modify and standardize the bee box as per their own experience. In these boxes, there was no scope for colony inspection without colony disturbance and during harvesting of bee hive products, colonies were fully disturbed. Terrestrial stingless bee colonies were arranged in cluster nests; broods were observed in the central portion at basal part, pollen balls arranged around the brood area and honey pots arranged on the surrounding beehive walls. These architecture shows envisage for standardization of scientific stingless bee box. The underground stingless bee (L. canifrons) broods were observed in the central part with pollen pots and honey pots arranged around the brood area. Their traditional method of harvesting beehive products requires more scientific intervention for improvement to minimize the colony disturbance and other losses. Stingless bee honey is a home remedy to all Naga tribes and they use it for various diseases. © 2016, National Institute of Science Communication and Information Resources (NISCAIR). All rights reserved.

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