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Search Results: 1 - 10 of 192322 matches for " Jharna D. Sengupta "
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Application of Graph Entropy in CRISPR and Repeats Detection in DNA Sequences  [PDF]
Dipendra C. Sengupta, Jharna D. Sengupta
Computational Molecular Bioscience (CMB) , 2016, DOI: 10.4236/cmb.2016.63004
Abstract: We analyzed DNA sequences using a new measure of entropy. The general aim was to analyze DNA sequences and find interesting sections of a genome using a new formulation of Shannon like entropy. We developed this new measure of entropy for any non-trivial graph or, more broadly, for any square matrix whose non-zero elements represent probabilistic weights assigned to connections or transitions between pairs of vertices. The new measure is called the graph entropy and it quantifies the aggregate indeterminacy effected by the variety of unique walks that exist between each pair of vertices. The new tool is shown to be uniquely capable of revealing CRISPR regions in bacterial genomes and to identify Tandem repeats and Direct repeats of genome. We have done experiment on 26 species and found many tandem repeats and direct repeats (CRISPR for bacteria or archaea). There are several existing separate CRISPR or Tandem finder tools but our entropy can find both of these features if present in genome.
On monodromy map
Jharna D. Sengupta
International Journal of Mathematics and Mathematical Sciences , 1993, DOI: 10.1155/s0161171293000870
Abstract: Let “ be a Fuchsian group acting on the upper half-plane U and having signature {p,n,0;v1,v2, ¢ € |,vn}; 2p ¢ ’2+ ¢ ‘j=1n(1 ¢ ’1vj)>0.
Effect of calcium and diltiazem on phenylhydrazine-induced oxidative injury in goat erythrocytes  [PDF]
Kaushik Das, Jharna Bhattacharyya
Health (Health) , 2010, DOI: 10.4236/health.2010.210181
Abstract: Lipid peroxidation, hemolysis and thiol contents were studied in intact goat erythrocytes exposed to phenylhydrazine. An increase in lipid peroxidation, hemolysis and thiol content was observed after phenylhydrazine treatment of erythrocyte. Extracellular Ca2+ potentiates the phenylhydrazine-induced lipid peroxidation and hemoly- sis of erythrocytes significantly. Ca2+ does not influence much the thiol content of phenylhydrazine treated erythrocytes. No effect of Ca2+ on control lipid peroxidation, hemolysis and thiol contents of erythrocytes was observed. Diltiazem and EDTA inhibited the increased responses of lipid peroxidation and hemolysis due to Ca2+. However the thiol content was not much influenced by either diltiazem or EDTA. The results suggest that oxidative damage of erythrocyte caused by phenyl hydrazine could be prevented by calcium channel antagonist, diltiazem, which may act as antioxidant also.
Dynamic stabilization devices in the treatment of low back pain
Sengupta D
Neurology India , 2005,
Abstract: Soft stabilization has an important role in the treatment of the degenerative lumbar spine. Fusion of one or two motion segments may not make a big difference in the total range of motion of the lumbar spine, but preserving flexibility of a motion segment may prevent adjacent segment disease and may permit disc replacement, even when facet joints need to be excised. A favourable environment is created in the motion segment by unloading the disc and permitting near normal motion, the disc may be able to repair itself or may supplement reparative potential of gene therapy.
Treatment protocol with progesterone, estradiol and oxytocin to improve conception rate and allows for early diagnosis of pregnancy in Black Bengal goat
D Sengupta,S Basu
Veterinary World , 2012,
Abstract: This work was performed to develop a treatment protocol that will shorten the length of estrous cycle in mated goats those fail to conceive, without reduction in conception rate. In experiment 1, ninety goats (single parity, 1 to 2 years age) were divided into nine groups of ten goats each. On return to heat, all groups were mated barring groups 1, 3 and 4. On days 3-5 of estrous, progesterone was treated at the dose rate of 10 mg i.m (groups 3, 5 and 7) or 30 mg i.m. (groups 4, 6 and 8). Groups 7, 8 and 9 received estradiol (500 μg i.m.; day 8) + oxytocin (10 IU i.m.; day 9) treatment. Following treatments, the goats were observed for heat and appearance of embryonic vescicles (EV) by transabdominal ultrasonography. In experiment 2, group 2 (n=50) was equal to group 8 of experiment 1 and group 1 (n=50) served as control. The litter size and weight was recorded at birth. Early progesterone treatment significantly (P<0.05) shortened the cycle length in groups 3 (day 15) and 4 (day 17) respectively compared to control (group 1; 21 days), whereas mated group 5 and 6 did not have any difference in conception rate compared to control (group 2). In does of group 5 & 6, EVs were observed much earlier than group 2. Estradiol + oxytocin treatment had no effect on conception rate of group 8, while does of group 7 and 9 returned to heat on day 12. In experiment 2, significant difference in conception rate and percentage of single, double, triplet and quadruplet born was observed between control and treated groups while the mean litter weight born was non-significant. Thus early pregnancy diagnosis can be done at by progesterone + estrogen treatment that not only shortens the length of estrous cycle, if the animals fail to conceive, but also improves the conception rate. [Vet. World 2012; 5(5.000): 269-273]
Revisiting LHC gluino mass bounds through radiative decays using MadAnalysis 5
G. Chalons,D. Sengupta
Physics , 2015,
Abstract: The ATLAS and CMS experiments at the CERN LHC have collected about 25 inverse femtobarns (fb) of data each at the end of their 8 TeV run, and ruled out a huge swath of parameter space in the context of Minimally Supersymmetric Standard Model (MSSM). Limits on masses of the gluino have been pushed to above 1 TeV. These limits are however extremely model dependent and do not always reflect the level of exclusion. So far the limits on the gluino mass using the simplified model approach only constrained its value using its three-body decays. We show in this work that already existing ATLAS and CMS analysis can also constrain the radiative gluino decay mode and we derived improved mass limits in particular when the mass difference between the LSP and the gluino is small.
Electron Microscopic Studies of Ilmenite from the Chhatrapur Coast, Odisha, India, and Their Implications in Processing
D. S. Rao,D. Sengupta
Journal of Geochemistry , 2014, DOI: 10.1155/2014/192639
Abstract: Ilmenite from the Chhatrapur coast, Odisha, India, was studied using optical microscope, X-ray diffraction, particle size analysis, and electron microprobe to decipher their micromorphology, texture(s), and elemental composition. The micromorphological features by electron microscope indicate that weathering processes such as mechanical and chemical, affected the placer heavy mineral ilmenite. These detrital ilmenites contain TiO2 in the range of 50.25% to 55.41% and FeO 42.72% to 49.99% in addition to Al2O3, MgO, MnO, CaO, Na2O, Cr2O3, NiO, ZnO, ZrO2, V2O5, and HfO2 (0 to 0.034%). Ti/(Ti + Fe) ratio in the ilmenite varied from 0.413 to 0.5, which indicates the effect of weathering/oxidation confirming microscopic observations. All the results revealed that these ilmenite grains were derived from the gneissic/granitic, basic and high grade metamorphic rocks, belonging to the Eastern Ghats Group of the Precambrian complex of coastal Orissa. 1. Introduction Ilmenite (FeTiO3), an important and the most abundant ore mineral of titanium, occurs in India along the coastal beach sands of Odisha, Andhra Pradesh, Tamil Nadu, and Kerala states. One important occurrence in Odisha is in the coastal stretch over a strike length of 18?kms (covering a total area of 26?Km2) between Gopalpur in the south and confluence of the Rushikulya river with Bay of Bengal at Ganjam in the north [1–6]. The Indian Rare Earths Limited (IREL), a public sector undertaking of the Department of Atomic Energy, Government of India, is mining and processing ilmenite along with other heavy minerals like garnet, monazite, rutile, sillimanite, and zircon from these sands since 1984, at its Chhatrapur (Matikhalo) plant. Several researchers have studied the ilmenites from across the world to assess the provenance from the geochemistry of ilmenites [7–11]. However, no in depth study has been undertaken on the variation in the chemical composition from grain to grain for the Chhatrapur beach placer ilmenites, aside from some preliminary investigations [12, 13] and the work on surface microtextures [14]. In view of this, the authors present here a detailed mineral geochemistry (by EPMA) for characterizing the ilmenites from the beach sands of Chhatrapur area, Ganjam district, Odisha. The results have been interpreted based on the present study for not only the understanding of the provenance of the ilmenites in this region but also their effects in processing and/or utilization. 2. Geology of the Area The coastal area of Odisha (from Gopalpur to the Mahanadi delta) runs in a NE–SW direction, nearly
A Comparative Study of Leaf Color Chart Based and Farmer`s Practice of Nitrogen Fertilizer Application on Rice under On-farm Conditions of Bangladesh
M.A. Haque,M.M. Husain,D.E. Jharna,M.N. Uddin
Pakistan Journal of Biological Sciences , 2003,
Abstract: An on-farm experiment was conducted to know the performance of Leaf Color Chart (LCC) based N application in rice compared with conventional farmers practice during aman season 2002 in nine farmer = s field at Gazipur districts of Bangladesh. Nine rice genotypes were included in the experiment and each genotype was cultivated in each farmers plot. Basal application of fertilizer was made with P, K, S and Zn. Top dress of N was made according to the treatments. LCC based N application produced slightly higher but insignificant grain yield than conventional farmer = s N application practice. N use efficiency was much higher in LCC based N application. 19-37 kg Nha G 1 was saved in LCC and it reduces disease and insect infestation in rice. It plays a positive role on environment by reducing the use of agrochemicals.
Spin Supersolid in Anisotropic Spin-One Heisenberg Chain
Pinaki Sengupta,Cristian D. Batista
Physics , 2007, DOI: 10.1103/PhysRevLett.99.217205
Abstract: We consider an S=1 Heisenberg chain with strong exchange (Delta) and single--ion uniaxial anisotropy (D) in a magnetic field (B) along the symmetry axis. The low energy spectrum is described by an effective S=1/2 XXZ model that acts on two different low energy sectors for a given window of fields. The vacuum of each sector exhibits Ising-like antiferromagnetic ordering that coexists with the finite spin stiffness obtained from the exact solution of the effective XXZ model. In this way, we demonstrate the existence of a spin supersolid phase. We also compute the full Delta-B quantum phase diagram by means of a quantum Monte Carlo simulation.
Field Induced Supersolid Phase in Spin-One Heisenberg Models
P. Sengupta,C. D. Batista
Physics , 2007, DOI: 10.1103/PhysRevLett.98.227201
Abstract: We use quantum Monte Carlo methods to demonstrate that the quantum phase diagram of the S=1 Heisenberg model with uniaxial anisotropy contains an extended supersolid phase. We also show that this Hamiltonian is a particular case of a more general and ubiquitous model that describes the low energy spectrum of a class of {\it isotropic} and {\it frustrated} spin systems. This crucial result provides the required guidance for finding experimental realizations of a spin supersolid state.
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