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Search Results: 1 - 10 of 1968 matches for " Anindita Sarkar "
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Tris(dicyclohexylammonium) hydrogen [1-hydroxy-2-(1H-imidazol-1-yl)-1-phosphonatoethane]phosphonate ethanol monosolvate monohydrate
Anindita Sarkar,Ignacy Cukrowski
Acta Crystallographica Section E , 2011, DOI: 10.1107/s1600536811042206
Abstract: In the title compound, 3C12H24N+·C5H7N2O7P23 ·C2H6O·H2O, the zoledronic acid molecule is singly protonated and stabilized by an intramolecular O—H...O interaction. The three-dimensional crystal structure is stabilized by intermolecular O—H...O, O—H...N and N—H...O interactions. The ethanol solvent molecule is disordered over two positions; the site-occupancy factor of the major component is 0.510 (4).
N,N-Dimethylethane-1,2-diaminium bis(3-hydroxybenzoate)
Anindita Sarkar,Ignacy Cukrowski
Acta Crystallographica Section E , 2011, DOI: 10.1107/s1600536811040578
Abstract: In the title compound, C4H14N22+·2C7H5O3 , both the N,N-dimethylethylenediamine N atoms are protonated and two 3-hydroxybenzoate anions act as counter-ions. In the crystal, anions and cations are linked by a network of N—H...O and O—H...O hydrogen bonds.
Bioremediation of lead by lead-resistant microorganisms, isolated from industrial sample  [PDF]
Sabyasachi Chatterjee, Anindita Mukherjee, Agniswar Sarkar, Pranab Roy
Advances in Bioscience and Biotechnology (ABB) , 2012, DOI: 10.4236/abb.2012.33041
Abstract: Lead contamination in water is a widespread problem throughout the world and results from industrial use and processing of lead ore. Bio-availability of lead can be hazardous for children and causes mental retardation. The use of lead free petrol is one measure to check this pollution, but this heavy metal is also present in industrial effluents and need to be removed before these effluents are discharged to natural land or water and as well as to the environment. Using bioremediation, bacteria could render lead non-bioavailable would provide an alternative option for detoxifying this contaminant in the environment. The property of some species of bacteria and algae, to extract metals from their surroundings, has been utilized to purify industrial effluents. The first step in devising a bioremediation strategy is to identify candidate bacterial strains capable of modifying the contaminant. Biotechnological approaches are recommended for extraction of metal forms can be grown in ponds where effluents (rich in heavy metals) are discharged. The microbes will extract the heavy metals and sequester them inside their cell membranes. The goal of the present study was to examine the capacity of lead resistant bacteria and bioremediation of lead contaminated water.
Bioprocessing Data for the Production of Marine Enzymes
Sreyashi Sarkar,Arnab Pramanik,Anindita Mitra,Joydeep Mukherjee
Marine Drugs , 2010, DOI: 10.3390/md8041323
Abstract: This review is a synopsis of different bioprocess engineering approaches adopted for the production of marine enzymes. Three major modes of operation: batch, fed-batch and continuous have been used for production of enzymes (such as protease, chitinase, agarase, peroxidase) mainly from marine bacteria and fungi on a laboratory bioreactor and pilot plant scales. Submerged, immobilized and solid-state processes in batch mode were widely employed. The fed-batch process was also applied in several bioprocesses. Continuous processes with suspended cells as well as with immobilized cells have been used. Investigations in shake flasks were conducted with the prospect of large-scale processing in reactors.
New Insight to Structure-Function Relationship of GalNAc Mediated Primary Interaction between Insecticidal Cry1Ac Toxin and HaALP Receptor of Helicoverpa armigera
Anindita Sengupta, Anindya Sarkar, Prerna Priya, Shubhra Ghosh Dastidar, Sampa Das
PLOS ONE , 2013, DOI: 10.1371/journal.pone.0078249
Abstract: Over the last few decades Cry1Ac toxin has been widely used in controlling the insect attack due to its high specificity towards target insects. The pore-forming toxin undergoes a complex mechanism in the insect midgut involving sequential interaction with specific glycosylated receptors in which terminal GalNAc molecule plays a vital role. Recent studies on Cry toxins interactions with specific receptors revealed the importance of several amino acid residues in domain III of Cry1Ac, namely Q509, N510, R511, Y513 and W545, serve as potential binding sites that surround the putative GalNAc binding pocket and mediate the toxin-receptor interaction. In the present study, alanine substitution mutations were generated in the Cry1Ac domain III region and functional significance of those key residues was monitored by insect bioassay on Helicoverpa armigera larvae. In addition, ligand blot analysis and SPR binding assay was performed to monitor the binding characteristics of Cry1Ac wild type and mutant toxins towards HaALP receptor isolated from Helicoverpa armigera. Mutagenesis data revealed that, alanine substitutions in R511, Y513 and W545 substantially impacted the relative affinity towards HaALP receptor and toxicity toward target insect. Furthermore, in silico study of GalNAc-mediated interaction also confirmed the important roles of these residues. This structural analysis will provide a detail insight for evaluating and engineering new generation Cry toxins to address the problem of change in insect behavioral patterns.
Controlling mobility via rapidly oscillating time-periodic stimulus
Prasun Sarkar,Alok Kumar Maity,Anindita Shit,Sudip Chattopadhyay,Jyotipratim Ray Chaudhuri,Suman K Banik
Physics , 2014, DOI: 10.1016/j.cplett.2014.03.062
Abstract: To address the dynamics of a Brownian particle on a periodic symmetric substrate under high-frequency periodic forcing with a vanishing time average, we construct an effective Langevin dynamics by invoking Kapitza-Landau time window. Our result is then exploited to simulate the mobility both for original and effective dynamics which are in good agreement with theoretical predictions. This close agreement and the enhancement of mobility are very robust against the tailoring of amplitude-to-frequency ratio which substantiates the correctness of our calculation. Present results may be illuminating for understanding the dynamics of cold atoms in electromagnetic fields.
Hydrochemical Characteristics of Groundwater for Domestic and Irrigation Purposes in Dwarakeswar Watershed Area, India  [PDF]
Sisir Kanti Nag, Anindita Lahiri
American Journal of Climate Change (AJCC) , 2012, DOI: 10.4236/ajcc.2012.14019
Abstract:

The Hydrochemical study was carried out in Dwarakeswar watershed area, Bankura and Purulia districts, West Bengal, India, with an objective of understanding the suitability of local groundwater quality for domestic and irrigation purposes. Groundwater samples have been collected from different villages within Dwarakeswar watershed area. The samples have been analysed to determine physical parameters like pH, EC, TDS and Hardness, the chemical parameters like Na, K, Ca, Fe, HCO3, SO4 and Cl. From the analysed data, some parameters like Sodium Absorption Ratio (SAR), Soluble Sodium Percentage (SSP), Residual Sodium Carbonate (RSC), Total Hardness (TH), Magnesium Absorption Ration (MAR) and Kelly’s Ratio (KR) have also been determined. The distribution pattern of TDS and chlorides, which are the general indicators of groundwater quality reveals that on an average the ground water is fresh and potable except the ground water in and around Teghari, Gara and Satyatan Primary school where the groundwater is not potable and may affect the health of local population because concentration of TDS exceeds the desirable limits of 500 mg/L. The aerial distribution of Total Dissolved Solids (TDS) reveals that highest concentration is recorded at Gara and Teghri and the lowest concentrations is noted in Suburdih and Kalabani. SAR values were ranged between 0.09 - 0.54 meq/L in pre monsoon and 0.01 - 0.24 meq/L in post-monsoon. It is evident from the whole sample set that the SAR value is excellent in all the samples. Hence, our findings strongly suggest that all the abstracted groundwater samples from the study area were suitable for irrigation. Results of analyses for physical and chemical parameters of groundwater in this area was found to be within the desirable Bureau of Indian Standards and World Health Organisation limits for drinking water.

Perfect Entanglement Transport in Quantum Spin Chain Systems  [PDF]
Sujit Sarkar
Journal of Quantum Information Science (JQIS) , 2011, DOI: 10.4236/jqis.2011.13014
Abstract: We propose a mechanism for perfect entanglement transport in anti-ferromagnetic (AFM) quantum spin chain systems with modulated exchange coupling and also for the modulation of on-site magnetic field. We use the principle of adiabatic quantum pumping process for entanglement transfer in the spin chain systems. We achieve the perfect entanglement transfer over an arbitrarily long distance and a better entanglement transport for longer AFM spin chain system than for the ferromagnetic one. We explain analytically and physically—why the entanglement hops in alternate sites. We find the condition for blocking of entanglement transport even in the perfect pumping situation. Our analytical solution interconnects quantum many body physics and quantum information science.
Data Aggregation Techniques in Wireless Sensor Network: A Survey
Anindita Ray,Debashis De
International Journal of Engineering Innovations and Research , 2012,
Abstract: Data aggregation is essential for the efficient operation of wireless sensor network. Data aggregation has been widely recognized as an efficient method to reduce energy consumption by reducing the number of packets sent. In this paper a comprehensive review of the existing data aggregation techniques in wireless sensor network have been presented. Suitable criterias have been defined to classify existing solutions. In this paper several open issues have been identified and discussed which propose directions for future research in this area.
KOHESIVITAS SUAMI ISTRI DI USIA MADYA
Diah Anindita,Khoiruddin Bashori
HUMANITAS , 2012,
Abstract: In the middle age, adjustment to developmental tasks will affect marital relationship. This study aimed to determine the cohesiveness of husband and wife who have entered middle adulthood, covering aspects of solidarity, marital satisfaction, interest, and affiliates and also the factors that affect the cohesiveness of husband and wife when the marriage age of 20 years or more. Subjects are three pairs of husband and wife who are legally married for over 20 years and each individual’s age between 40-60 years old. This qualitative research used the case study approach and collected data by semi-structured interviews and nonparticipant observation. The results showed that the cohesiveness of husband and wife owned in middle age is different in each pair. In the first couple showed low cohesion, high on the second couple, and medium for the third couple. In the third couple, there is a change before the peak of the conflict in mid-2011 by now. Factors that affect the cohesiveness of husband and wife in middle age is a social perception, social support, emotional regulation, a period of quiet in the middle ages, the intensity of togetherness, understanding of gender, temperament, and love.
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