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Association of Critically Endangered Bengal Florican with other bird species in two sites of Manas, Assam, India
Namita Brahma,P.C. Bhattacharjee,B. P. Lahkar
Asian Journal of Conservation Biology , 2013,
Abstract: Birds and animals group together for diverse benefits, including anti-predator, foraging, and reproductive advantages. Present study is aimed to know association of Bengal florican with other bird species found in two different habitats, one is natural and other human intervened based on association analysis in Manas National Park and understand potential benefits derived from these associations. This study was carried out in two site one in natural habitat of Bengal florican Kuribeel inside Manas National Park and other one in Koklabari Agricultural Farm outside Manas National Park which is man made habitat. Study was conducted from morning 0530 - 1000 hrs and afternoon 1500 hrs - 1700 hrs in 100 m radius circular plots, centre on the interactions of 50 m by 50 m regular grid in Bengal florican territories. Fourteen bird species found to associate with Bengal florican, of which nine species in Kuribeel, and thirteen species of birds in Koklabari seed farm. From association analysis, it is found that Bengal florican had stronger interspecific associations with Indian peafowl in the natural habitat (Kuribeel). However, in Kokalabari seed farm Bengal florican was found to associate with Red wattle lapwing. In this study, association strengths of Bengal florican with other bird species follow different trends in the two study sites.
Magnetic field effects on unsteady free convection MHD flow between two heated vertical plates (one adiabatic)
B. Kalita,J. Lahkar
Advanced Studies in Theoretical Physics , 2012,
Abstract:
AN OVERVIEW ON: PHARMACEUTICAL AEROSOLS
Lahkar Sunita
International Research Journal of Pharmacy , 2012,
Abstract: Pulmonary drug delivery system is found to have a wide range of application in the treatment of illness as well as in the research field due to its beneficial effect over the other dosage form. It is used not only in treatment of illness of asthma and chronic obstructive pulmonary disease (COPD) but also finds its application in the treatment of diseases like diabetes, angina pectoris. This review article deals with an overview of one of the pulmonary drug delivery system called pharmaceutical aerosols.
Interplanetary Consequences of a Large CME
M. Lahkar,P. K. Manoharan,K. Mahalakshmi,K. Prabhu,G. Agalya,S. Shaheda Begum,P. Revathi
Physics , 2009, DOI: 10.1007/978-3-642-02859-5_64
Abstract: We analyze a coronal mass ejection (CME) which resulted from an intense flare in active region AR486 on November 4, 2003. The CME propagation and speed are studied with interplanetary scintillation images, near-Earth space mission data, and Ulysses measurements. Together, these diverse diagnostics suggest that the internal magnetic energy of the CME determines its interplanetary consequences.
A Protease Isolated from the Latex of Plumeria rubra Linn (Apocynaceae) 2: Anti-inflammatory and Wound- Healing Activities
I Chanda, U Sarma, SK Basu, M Lahkar, SK Dutta
Tropical Journal of Pharmaceutical Research , 2011,
Abstract: Purpose: The aim of this study was to investigate the anti-inflammatory and wound-healing activities of the protease isolated from the latex of Plumeria rubra Linn. Methods: The protease was isolated from the latex of the plant by acetone precipitation method and given a trivial name, Plumerin-R. The anti-inflammatory activity of the protease was based on its effects on carrageenan-induced paw oedema in rats. Its wound healing effect was investigated using an excision wound rat model. Results: Four hours after treatment, the reduction in carrageenan-induced rat paw oedema by 20, 40 and 80 mg/kg body weight of plumerin-R was 21.6, 33.8 and 48.8 %, respectively, while oedema reduction by indomethacin (10 mg/kg) was 58.0 %. Plumerin-R showed significant (p < 0.05) wound closure and epithelialization time compared with control. Conclusion: This study demonstrates that the protease, Plumerin-R, has significant anti-inflammatory and wound-healing properties.
Nonlinear Optical Properties of Two Different Nanoassemblies of Polydiacetylene (PDA): PDA Nanovesicles and PDA Nanocrystals  [PDF]
B. Bhushan, T. Kundu, B. P. Singh
Optics and Photonics Journal (OPJ) , 2013, DOI: 10.4236/opj.2013.34042
Abstract:

We have synthesized and characterized two different nanoassemblies of polydiacetylene (PDA), PDA nanovesicles and PDA nanocrystals, in order to study the influence of chain packing geometry of the two nanoassemblies on their third order nonlinear optical properties. The second molecular hyperpolarizability γ(-ω,ω,-ω,ω)of the two samples was investigated by antiresonant ring interferometric nonlinear spectroscopic (ARINS) technique using femtosecond modelocked Ti:sapphire laser in the spectral range of 720 nm - 820 nm. The observed spectral dispersion of γ has been explained in the framework of three-essential states model involving the ground state, a one-photon excited state and a two-photon excited state. The observed optical nonlinearity has been correlated with the electronic structure of the two samples. The energy of two-photon state, transition dipole moments and line width of the transitions have been estimated. Our studies show that the arrangement of polymer chains in polydiacetylene nanocrystals is more favorable for higher nonlinearity.

Enrichment of Cobalt Values by Dry Magnetic Separation from Low-Grade Manganese Ores of Bonai-Keonjhar Belt, Orissa  [PDF]
P. P. Mishra, B. K. Mohapatra, P. P. Singh
Journal of Minerals and Materials Characterization and Engineering (JMMCE) , 2009, DOI: 10.4236/jmmce.2009.84028
Abstract: Resource potential of cobalt in India is practically negligible. Cobalt in marine manganese nodule though known since long, its report from terrestrial manganese ore is least observed. This paper reports the occurrence of cobalt in low-grade manganese ores of Bonai-Keonjhar belt, Orissa, eastern India and describes methods for its possible enrichment. Cobalt is associated with manganese minerals like lithiophorite (~CoO: 1.2%) and cryptomelane (~CoO: 0.2%). A feed of low-grade siliceous manganese ore containing 26% Mn and 32% SiO2 and 0.08% Co was subjected to physical beneficiation. By processing the low-grade siliceous ore on a dry belt magnetic separator, a product with 47% Mn at 60% recovery could be obtained. It was observed that along with manganese the cobalt value gets enriched (~Co: 0.38%) more than four times in comparison to the feed. Some other traces like Ni, Cu, Zn, Ga, Li etc. also get enriched in the magnetic product. Thus, through simple dry magnetic separation a low-valued material cannot only be converted to usable product but two valuable metals can also be recovered from it.
A Hybrid Short Term Load Forecasting Model of an Indian Grid  [PDF]
R. Behera, B. P. Panigrahi, B. B. Pati
Energy and Power Engineering (EPE) , 2011, DOI: 10.4236/epe.2011.32024
Abstract: This paper describes an application of combined model of extrapolation and correlation techniques for short term load forecasting of an Indian substation. Here effort has been given to improvise the accuracy of elec-trical load forecasting considering the factors, past data of the load, respective weather condition and finan-cial growth of the people. These factors are derived by curve fitting technique. Then simulation has been conducted using MATLAB tools. Here it has been suggested that consideration of 20 years data for a devel-oping country should be ignored as the development of a country is highly unpredictable. However, the im-portance of the past data should not be ignored. Here, just previous five years data are used to determine the above factors.
Variable Temperature Laser Light Scattering Microscopy (VTLLSM) Studies on 10-100 μm Size High Purity Gold and Commercial Grade Zinc Grains  [PDF]
P. Sita Rama Rao, P. B. V. Prasad, P. B. Shashikanth
Materials Sciences and Applications (MSA) , 2010, DOI: 10.4236/msa.2010.16048
Abstract: The VTLLS microscopy studies were made on high purity gold and commercial grade zinc grains in a temperature range of 30-230?C. Differential area ω and surface activity Sa were estimated from photomicrographs. The ω vs dT/dt (rate of heating) curve was seen to differ from those of silver and titanium. The nature of curve between normalized ω and dT/dt was seen to be non-exponential. The characteristic relation between sectorized differential area ωsec and mean temperature was examined. The present study further establishes the simplicity and versatility of the VTLLS technique, in studying the defect-sub-structure of metal particles such as Au and Zn in presence of an imposed temperature gradient in a reasonable way. As such an attempt was made to connect the ω and defect-sub-structure related parameters.
An Interpretation of Structures from the Aeromagnetic Field over a Region in the Nigerian Younger Granite Province  [PDF]
J. Raimi, B. B. M. Dewu, P. Sule
International Journal of Geosciences (IJG) , 2014, DOI: 10.4236/ijg.2014.53031
Abstract:

An interpretation of high resolution aeromagnetic data was carried out to provide new information about the study area. Located between latitude 10°30'N and 11°00'N and longitude 8°30'E and 9°00'E, the interpretation revealed previously unknown folds and magnetic anomaly with a signature that is similar to those associated with ring complexes in the study area but without the surface manifestation that is associated with the complexes. Qualitatively interpreted as unexposed ring complex, the magnetic anomaly is underlain by cross-over of major lineaments; implying presence of weak zone that probably allowed the volcanic eruption that initiated the emplacement of the source of the anomaly. A depth that ranges from outcrop to 1200 m and from outcrop to 1800 m is respectively suggested for the unexposed ring complex and folds by the Euler deconvolution results.

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