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Search Results: 1 - 10 of 25964 matches for " Priti Kumar Roy "
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Host Pathogen Interactions with Recovery Rate: A Mathematical Study
Priti Kumar Roy,Biplab Chattopadhyay
Lecture Notes in Engineering and Computer Science , 2010,
Host Pathogen Interactions: Insight of Delay Response Recovery and Optimal Control in Disease Pathogenesis
Priti Kumar Roy,Jayanta Mondal
Engineering Letters , 2010,
Mathematical Modeling on Immunopathogenesis in Chronic Plaque of Psoriasis: A Theoretical Study
Priti Kumar Roy,Jhumpa Bhadra,Biplab Chattopadhyay
Lecture Notes in Engineering and Computer Science , 2010,
T-cell Proliferation in a Mathematical Model of CTL Activity Through HIV-1 Infection
Priti Kumar Roy,Amar Nath Chatterjee
Lecture Notes in Engineering and Computer Science , 2010,
HIV Infection in T-lymphocytes and Drug Induced CTL Response of a Time Delayed Model
Priti Kumar Roy,Amar Nath Chatterjee,Biplab Chattopadhyay
Lecture Notes in Engineering and Computer Science , 2010,
A Genome-Wide Screen Indicates Correlation between Differentiation and Expression of Metabolism Related Genes
Priti Roy, Brijesh Kumar, Akhilesh Shende, Anupama Singh, Anil Meena, Ritika Ghosal, Madhav Ranganathan, Amitabha Bandyopadhyay
PLOS ONE , 2013, DOI: 10.1371/journal.pone.0063670
Abstract: Differentiated tissues may be considered as materials with distinct properties. The differentiation program of a given tissue ensures that it acquires material properties commensurate with its function. It may be hypothesized that some of these properties are acquired through production of tissue-specific metabolites synthesized by metabolic enzymes. To establish correlation between metabolism and organogenesis we have carried out a genome-wide expression study of metabolism related genes by RNA in-situ hybridization. 23% of the metabolism related genes studied are expressed in a tissue-restricted but not tissue-exclusive manner. We have conducted the screen on whole mount chicken (Gallus gallus) embryos from four distinct developmental stages to correlate dynamic changes in expression patterns of metabolic enzymes with spatio-temporally unique developmental events. Our data strongly suggests that unique combinations of metabolism related genes, and not specific metabolic pathways, are upregulated during differentiation. Further, expression of metabolism related genes in well established signaling centers that regulate different aspects of morphogenesis indicates developmental roles of some of the metabolism related genes. The database of tissue-restricted expression patterns of metabolism related genes, generated in this study, should serve as a resource for systematic identification of these genes with tissue-specific functions during development. Finally, comprehensive understanding of differentiation is not possible unless the downstream genes of a differentiation cascade are identified. We propose, metabolic enzymes constitute a significant portion of these downstream target genes. Thus our study should help elucidate different aspects of tissue differentiation.
Spatio-Temporally Restricted Expression of Cell Adhesion Molecules during Chicken Embryonic Development
Priti Roy, Amitabha Bandyopadhyay
PLOS ONE , 2014, DOI: 10.1371/journal.pone.0096837
Abstract: Differential cell adhesive properties are known to regulate important developmental events like cell sorting and cell migration. Cadherins and protocadherins are known to mediate these cellular properties. Though a large number of such molecules have been predicted, their characterization in terms of interactive properties and cellular roles is far from being comprehensive. To narrow down the tissue context and collect correlative evidence for tissue specific roles of these molecules, we have carried out whole-mount in situ hybridization based RNA expression study for seven cadherins and four protocadherins. In developing chicken embryos (HH stages 18, 22, 26 and 28) cadherins and protocadherins are expressed in tissue restricted manner. This expression study elucidates precise expression domains of cell adhesion molecules in the context of developing embryos. These expression domains provide spatio-temporal context in which the function of these genes can be further explored.
Use of Medicinal Plant and Its Vulnerability Due to Climate Change in Northern Part of Bangladesh  [PDF]
Sadhan Kumar Roy, Dipak Kumar Roy
American Journal of Plant Sciences (AJPS) , 2016, DOI: 10.4236/ajps.2016.713166
Abstract: Medicinal plants are playing an important role to human livelihood. Bangladesh is well recognized of medicinal plants wealth as unique and globally rich. The studies demonstrate about the value of traditional systems of medicine as economically useful plants and possible effects of climate change on medicinal plants. It is true that climate change is causing noticeable effects on life cycles and distribution of the plant species. However, climate change effects on medicinal plants are widely unclear in Bangladesh. At present, a huge number of populations in Bangladesh are directly dependent on the healthcare treatment by medicinal plants that is why it is an emerging concern in Bangladesh. It is a crying need to improve our understanding the effects on medicinal plants by various researches is stressed in the present article. To know the present condition of medicinal plants and effects of climate change on medicinal plants in northern part of Bangladesh an attempt is being taken here. The study also added the optimum use of medicinal plants and their conservation in northern part of Bangladesh.
On the Design of Compact Dual Band Rejection Filters using Circular Open Loop Resonators
Priti Suresh Upare,Raj Kumar
International Journal of Engineering Science and Technology , 2012,
Abstract: In this article, we describe the design of band pass and band rejection filter of a circular shape for UWBcommunication applications. The dual band rejection rejection and multiband have been achieved by usingcircular shape multi-armed open-loop resonators. Each resonator pair of arms creates a reject band in the transmission response. Broad band stop is obtained using one circular open-loop resonator By properly adjusting the multireject bands, appropriate multi-transmission bands are created. This filter is fabricated with optimized dimension and tested. The measurement results are compared with simulated results. Both are in closed agreement. The diameter of the circular open loop resonators, its width and spacing are the crucial parameters decide the bandwidth of the signal
Cyclic codes from the first class two-prime Whiteman's generalized cyclotomic sequence with order 6
Pramod Kumar Kewat,Priti Kumari
Mathematics , 2015,
Abstract: Binary Whiteman's cyclotomic sequences of orders 2 and 4 have a number of good randomness properties. In this paper, we compute the autocorrelation values and linear complexity of the first class two-prime Whiteman's generalized cyclotomic sequence (WGCS-I) of order $d=6$. Our results show that the autocorrelation values of this sequence is four-valued or five-valued if $(n_1-1)(n_2-1)/36$ is even or odd respectively, where $n_1$ and $n_2$ are two distinct odd primes and their linear complexity is quite good. We employ the two-prime WGCS-I of order 6 to construct several classes of cyclic codes over $\mathrm{GF}(q)$ with length $n_1n_2$. We also obtain the lower bounds on the minimum distance of these cyclic codes.
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