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Search Results: 1 - 10 of 418 matches for " Amitava Konar "
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Screening for Aphid Incidence on Some Potato Germplasm in Plains of West Bengal  [PDF]
Biplab Kahar, Amitava Konar
Agricultural Sciences (AS) , 2016, DOI: 10.4236/as.2016.76036
Abstract: A field trial was conducted to study the impact of various potato germplasm against aphids, Myzus persicae (Sulzer) and Aphis gossypii Glover (Aphididae: Hemiptera) during rabi season from November to March in 2012-2013 and 2013-2014, respectively at Adisaptagram Block Seed Farm, Hooghly, West Bengal. The population of aphids was started on potato crop in between third week of December and first week of January irrespective of various germplasms, except K. Chipsona-2, where its infestation was initiated during second and third week of January. Then, their population was gradually increased to reach its critical level (ETL) during first and second week of January in most of the potato germplasm, except in K. Anand, K. Chipsona-1, K. Chipsona-2 and Sailaja, where it was crossed in between fourth week of January and first week of February. The peak population of aphids was observed during third and fourth week of February in most of the potato germplasm. It was observed that K. Ashoka, K. Badshah, K. Chandramukhi, K. Jawahar, K. Jyoti and K. Pukhraj were highly susceptible to the pests, while K. Anand and K. Sutlez were moderately susceptible but K. Chipsona-1 , K. Chipsona-2 and K. Sailaja were less susceptible or tolerant to the pests. Maximum tuber yield (t/ha) of potato was recorded in K. Badshah (36.58 - 43.92) while it was lowest in K. Chandramukhi (22.08 - 22.12).
Adsorptive Mass Transport of Dye on Rice Husk Ash  [PDF]
Debasish Sarkar, Amitava Bandyopadhyay
Journal of Water Resource and Protection (JWARP) , 2010, DOI: 10.4236/jwarp.2010.25049
Abstract: Experimentations have been carried out to characterize the adsorption of Methylene Blue (MB) and Congo Red (CR) dyes in the aqueous phase onto Rice Husk Ash (RHA). Theoretically analyses are also made for describing the sorption and diffusion processes. The effective pore diffusivities of the dye molecules studied in RHA are determined by a suitable global optimization technique. The depth of penetration, on the other hand, has been estimated for various initial concentrations of dyes. Theoretically predicted concentration pro-files are compared with the experimental values at different initial concentrations of these dyes. Such com-parative studies indicate that the predicted values are in excellent agreement with the experimental values.
Bt cotton influencing enzymatic activities under varied soils  [PDF]
Kasturikasen Beura, Amitava Rakshit
Open Journal of Ecology (OJE) , 2013, DOI: 10.4236/oje.2013.38059
Abstract:

The enzymatic activity was evaluated under both Bt and non-Bt systems in varied soil type. The study was conducted during the 2010 wet season (July to December) in a net-house at the Institute of Agricultural Sciences of Banaras Hindu University. It was carried out on three different soil ordersi.e.entisol, inceptisol and alfisol. Bt cotton (cvNCS-138) and its non-transgenic isoline (cvNCS-138) were grown until maturity. A no crop pot was maintained with three replications for all the three soil orders. Study design was a factorial experiment under a completely randomized block design with three replications. The study concludes that soil under Bt cotton cultivar produced significantly higher amount of phosphatase activity than both nonBt and no crop treatments at three growth stages. And the value decreased as the crop growth period advanced. The interaction effect between soil type and Bt-crop was found to be significant in different growth stages throughout the growing season. Results from the study revealed that a significant reduction (9.4%) of the dehydrogenase activity and soil respiration (5%) in the rhizosphere of Bt cotton over non-Bt isoline.

Bifurcation and Chaos in Delayed Cellular Neural Network Model  [PDF]
Pritha Das, Amitava Kundu
Journal of Applied Mathematics and Physics (JAMP) , 2014, DOI: 10.4236/jamp.2014.25027
Abstract: This paper deals with control of chaotic behavior of a delayed Cellular Neural Network (DCNN) model which is a one-dimensional regular array of four cells with continuous activation function. We investigate different dynamical behaviors including limit cycle, torus, and chaos for different range of weight parameters of the system. Regarding synaptic weight as parameter, Hopf bifurcations are obtained in the system without delay. In the delayed model condition for the Global asymptotic stability of the equilibrium point is presented. Numerical simulation and results are given to show the role of delay in chaos control of the CNNs.
Integrin Alpha-V Beta-3-Matrix Metalloproteinase-2 (MMP-2), Cross-Talk  [PDF]
Hrishikesh Sil, Amitava Chatterjee
Journal of Cancer Therapy (JCT) , 2015, DOI: 10.4236/jct.2015.69087
Abstract: The present study aimed to detect comparative expression of integrin αVβ3 and its involvement in expression and activation of matrix metalloproteinase-2 (MMP-2) in 25 malignant human breast tumor and adjacent normal breast tissues from different clinical TNM stages (DCIS to T4) of the disease and possible involvement of known regulating parameters of MMP-2 like TIMP-2, MT1-MMP and EMPRIN. Integrin αVβ3 was highly expressed in tumors than adjacent normal breast tissues. Pro-MMP-2(72-KD) was mainly expressed in adjacent normal tissues compared to tumors. The mature forms of MMP-2 (68 KD and 64 KD) were found only in tumors. Appreciable expression of TIMP-2 and induction of MT1-MMP and EMPRIN in T2-T4 stages suggested their possible role in MMP-2 activation. Over expression Integrin αVβ3 in tumors than adjacent normal breast tissues was an indication of cancer progression with involvement of integrin signaling. We conclude that, the co-precipitation of MMP-2 with αvβ3 by anti-αv antibody is a strong indication that integrin α
Relationship among Different Soil Biochemical Methods to Determine Soil Health  [PDF]
Amitava Chatterjee, Umesh Acharya
Open Journal of Soil Science (OJSS) , 2018, DOI: 10.4236/ojss.2018.811022
Abstract: Numerous soil biochemical methods are used to determine the soil health status, but the relationships among these methods are not well understood. Relationships among soil biochemical tests, 1) chloroform fumigated microbial biomass C (CFMBC), 2) permanganate oxidizable C (POXC), 3) Solvita CO2-burst (Solvita), 4) Solvita labile amino nitrogen (SLAN), and short-term soil CO2 efflux during laboratory incubation using (v) Alkali-base trap (Alkali) and (vi) infrared gas analyzer (IRGA), were evaluated for nine agricultural soils collected across the Red River Valley of North Dakota and Minnesota, USA. Not a single test is comprehensive to relate with all soil biochemical tests. Coefficient of variation percentage for particular method varied with soil type. Among six tests, CFMBC is significantly (p < 0.05) related with Alkali (r = 0.37), Solvita (r = 0.57), SLAN (r = 0.52), and POXC (r = 0.68). Soil CFMBC correlates with most of soil biochemical tests and can be potential to determine soil biochemical condition.
Juvenile Justice as a Part of Child and Adolescent Care
Devashish Konar
Journal of Indian Association for Child and Adolescent Mental Health , 2005,
Abstract: Juvenile justice has been given some shape with Juvenile Justice Act 2000 AD. Persons dealing withchildren need to sensitize themselves with this Act. One needs to know the provisions made, tounderstand whether it is being properly implemented. Only on observing it being implemented, can oneget insight into the problems inherent in it, and if one knows the problems, one can suggestimprovements in the Act. Even if the law gives adequate guidelines, institutions are still needed to lookafter the children in distress or children in conflict with law. For successful compliance of Court orders,and to punish violators, monitoring bodies need to be set up, who should be given legal powers as well.Effective child protection and development depends on skills, knowledge and judgment of allprofessionals, personnel and staff working with children.
The Magnetar Fields
Sushan Konar
Physics , 2003,
Abstract: We discuss the nature of evolution of the magnetic field in Magnetars.
Of Neutrinos and Magnetars
Sushan Konar
Physics , 2003,
Abstract: We discuss the nature of neutrino propagation in the presence of strong magnetic fields of Magnetars.
The Binary History and the Magnetic Field of Neutron Star
Sushan Konar
Physics , 2009,
Abstract: There has been strong observational evidence suggesting a causal connection between the binary history of neutron stars and the evolution of their magnetic field. In this article we discuss one of the plausible mechanisms proposed for the evolution of the surface magnetic field, that of the diamagnetic screening of the field by accreted material.
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