Tripura, India
Tripura, India

Tripura University is the main public/central government university of the Indian state of Tripura. Tripura University ranked 4th position in Eastern and 43rd position in all India according to India Today – Nielsen University Ranking Survey 2014 published in India Today on June 30, 2014. Wikipedia.

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Dinda B.,Tripura University | Debnath S.,Mb B College | Banik R.,Tripura University
Chemical and Pharmaceutical Bulletin | Year: 2011

A compilation of new naturally occurring iridoids and secoiridoids including their glycosides, esters, aglycones, derivatives and dimers reported during mid 2008-2010 is provided with available physical and spectral data: mp, [α]D, UV, IR, circular dichroism (CD), 1H- and 13C-NMR as well as natural source with family and references. The important bioactivity of new and known iridoids and secoiridoids reported during this period is also highlighted. © 2011 Pharmaceutical Society of Japan.

Singh M.,Tripura University | Barman A.S.,Tripura University
Molecular Biology Reports | Year: 2013

It is well known that transcriptionally inactive rRNA genes are correlated with DNA hyper-methylation and histone hypo-methylation and there is clear evidence in humans that DNA and histone modification which alter chromatin structure are related to chromosome fragility. Very little is known about the biological cause of 45S rDNA fragility. In this report we characterized the chromosome breakage or gap associated with 45S rDNA in a fish species Channa punctatus. The rDNA mapping in C. punctatus, showed many chromosome breakages or gap formations, and all occurred exclusively in the 45S rDNA sites in anterior kidney cells. We observed that the number of chromosomes plus chromosome fragments was often more than the expected 32 in most cells. Total 67% metaphase spread showed the expected or normal 32 chromosomes, while 33% metaphase spread showed 33 and/or 34 chromosomes and/or chromosome fragments. The chromosome lesions observed in this study are very similar cytologically to that of fragile sites observed in human chromosomes. Possible causes for the spontaneous expression of fragile sites and their potential biological significance are also discussed in present report. © 2012 Springer Science+Business Media Dordrecht.

Majumdar S.,Tripura University | De J.,Tripura University | Hossain J.,Tripura University | Basak A.,Regional Protein Chemistry Center
Tetrahedron Letters | Year: 2013

A fast, efficient and simple route for the N-formylation of amines has been developed by treating amines with 85% formic acid at 70°C in the presence of 5 mol % of protic ionic liquid as catalyst under solvent-free condition. This method provides a green and much improved protocol over the existing methods. © 2012 Elsevier Ltd. All rights reserved.

Langmuir-Blodgett (LB) films of N,N′-dioctadecyl thiacyanine perchlorate (TC18) and octadecyl rhodamine B chloride (RhB18) and their mixtures in the presence and absence ofclay mineral layers were investigated by recording surface pressure-area (π-A) isotherms and by UV-vis and fluorescencespectroscopies. The (π-A) isotherms of TC18, RhB18, and their mixtures are characteristic of liquid expanded state behavior with repulsive interactions between the two cationic dyes. In the presence of laponite, the(π-A) isotherms show liquid expanded and condensed-state behavior. In laponite dispersions and in monolayers, TC18 has a strong tendency to aggregate with formation of H- and J- aggregates. The absorption and fluorescence maxima of the monomers in the films are at 435 nm and at 480 nm; H-dimers have an absorption maximum around 410 nm and do not fluoresce. J-dimers are present in all the films with absorption maximum at461 nm and fluorescence at 463 nm. RhB18 is mainly present as monomers in the LB films with an absorption maximum at 576 nm and fluorescence at 595 nm. Fluorescence resonance energy transferfrom TC18 to RhB18 has been observed in clay dispersions and in films with and without laponite. The optimum condition for TC18→RhB18 fluorescence energy transfer in the films is 90 mol% TC18 p 10 mol % RhB18. © 2010 American Chemical Society.

Acharya S.,Tripura University
Journal of Pure and Applied Microbiology | Year: 2010

The presence of fungal rot disease in the edible bamboo shoot of Melocanna baccifera in Tripura was reported for first time. The morphological and hierarchical status were also studied in detail. In situ pathogenicity test was carried out according to Koch's postulate through which rot pathogen Pterulicium xylogenum was re-isolated.

Dinda B.,Tripura University | Silsarma I.,Tripura University | Dinda M.,Jadavpur University | Rudrapaul P.,Tripura University
Journal of Ethnopharmacology | Year: 2015

Ethnopharmacological relevance Oroxylum indicum\ (L.) Kurz has been used for centuries as a traditional medicine in Asia in ethnomedicinal systems for the prevention and treatment of several diseases, such as jaundice, arthritic and rheumatic problems, gastric ulcers, tumors, respiratory diseases, diabetes, and diarrhea and dysentery, among others. The present review provides scientific evidence supporting the therapeutic potency of the plant for ethnomedicinal uses and identifies gaps for future research to facilitate commercial exploitation. Methods This review is based on available information on traditional uses and phytochemical, pharmacological, clinical and toxicity data for Oroxylum indicum that was collected from electronic (SciFinder, PubMed, Science Direct, and ACS, among others) and library searches. Keyfinding A variety of traditional medicinal uses of Oroxylum indicum in different Southeast and South Asian countries have been reported in books describing the uses of these plants. Phytochemical investigations of the different parts of the plant resulted in identification of approximately 111 compounds, among which flavonoids, naphthalenoids and cyclohexylethanoids are the predominant groups. The crude extracts and their isolates exhibit a wide spectrum of in vitro and in vivo pharmacological activities involving antimicrobial, anti-inflammatory, anti-arthritic, anticancer, anti-ulcer, hepatoprotective, antidiabetic, antidiarrheal and antioxidant activities. Flavonoids are the major constituents of all parts of the plant. From a toxicity perspective, only aqueous and ethanolic extracts of stem bark, root bark and fruits have been assessed and found to be safe. The major flavonoids of the stem bark, such as baicalein, chrysin and oroxylin A, were reported for the first time as natural flavonoids with potent inhibitory activity against endoprotease enzymes and proprotein convertases, which play a key role in the growth of cancer and in viral and bacterial infections. Flavonoids are the active components of bioactive extracts. Several Ayurvedic medicines have been formulated either singly using this plant or along with other herbs for the treatment of different diseases. Conclusions Pharmacological results have supported some traditional medicinal uses of Oroxylum indicum. Several extracts and their isolates have been reported to exhibit interesting pharmacological properties. These components could be useful as sources of modern medicines following future detailed studies to elucidate their underlying mechanisms, toxicity, synergistic effects and clinical trials. Attention should also be focused on pharmacological studies investigating the traditional uses of the plant, which have not been yet addressed, as well as clinical studies investigating commercial Ayurvedic medicines and other ethnomedicinal preparations in human subjects based on this plant to confirm the safety and quality of the preparations. © 2014 Elsevier Ireland Ltd.

Tripathy B.C.,Institute of Advanced Study in Science and Technology | Debnath S.,Tripura University
Journal of Intelligent and Fuzzy Systems | Year: 2013

In this paper we introduce the notion of γ-open sets and γ-continuous functions in fuzzy bitopological spaces. We examine some basic properties and prove some characterization theorems for the said functions. It is observed that every pairwise fuzzy γ-continuous functions is pairwise fuzzy precontinuous but the converse not true. © 2013 - IOS Press and the authors. All rights reserved.

Folk people of Tripura, a small state of Northeast India, rely on their own traditional knowledge of phenological indicators for predicting the weather, to help plan their agroforestry activities and for disaster prevention. One such prediction relates to the phenology of Nyctanthes arbor-tristis L., night-flowering jasmine, which helps them to forecast the onset of heavy rainfall. During 2007-2009, a comprehensive study was initiated to document the predictive accuracy of this indicator, through conversations and interviews with village members, observation and reviewing the older literature. The researchers found that the flowering of Nyctanthes arbor-tristis is a good indicator of weather lore for the prediction of both short- and long-range precipitation. The information about the prediction of rainfall by observing the flowering phenology was recorded through the interview with village elders. The researchers use interview schedule while interacting with elders. Several small groups of knowledge holders including elder men and women (as focus group) were selected randomly from a wider population of study areas and sampled. A questionnaire was also prepared for knowledge gathering through open conversation and discussion. Prior Informed Consent (PIC) was taken from the knowledge providers time to time.

Acharya S.,Tripura University
Indian Journal of Traditional Knowledge | Year: 2011

The method used by local and indigenous peoples for predicting rainfall and other weather conditions solely on the basis of bio-indicators - the phenology of plants and behavior of animals - is coined as a new term: Presage Biology. Some of these activities of floral and faunal diversity are described in their application to predict oncoming rain, based a literature review as well as personal observations of present author as well as other reference sources pertaining to India and different parts of the world.

Electronic spectrum of astrophysically important molecule magnesium hydride (MgH) has been studied using configuration interaction methodology excluding and including spin–orbit coupling. Potential energy curves of several spin-independent (Λ−S) electronic states have been constructed and spectroscopic constants of low-lying bound Λ−S states within 8.2 eV of term energy are reported in the first stage of calculations. The X2Σ+ is identified as the ground state in the Λ−S level. In the subsequent stage, the spin–orbit interaction has been incorporated and its effects on the potential energy curves and spectroscopic features of different electronic states of the species have been investigated. The X2Σ+ 1/2 is identified as the spin–orbit (Ω) ground state of the species. Transition moments of several dipole-allowed transitions are computed in both the stages and radiative lifetimes of the corresponding excited states are computed. Electric dipole moments (µ) for a number of low-lying bound Λ−S states as well as several low-lying Ω-states are also calculated in the present study. © 2016 Informa UK Limited, trading as Taylor & Francis Group

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