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A new species of WalkerellaWestwood (Chalcidoidea: Pteromalidae: Otitesellinae) from India
Achintya Pramanik,Debjani Dey 한국응용곤충학회 2017 Journal of Asia-Pacific Entomology Vol.20 No.1
Walkerella Westwood, a non-pollinating fig wasp genus belonging to subfamily Otitesellinae (Chalcidoidea, Pteromalidae) is represented by eight known species. A new species Walkerella tridentata Pramanik & Dey sp. nov. is described in this paper. This new species exhibiting extreme sexual dimorphism is reared from Ficus amplissima in New Delhi, India. Available species level diagnostic key is supplemented to facilitate identification of both sexes of the new species.
Pramanik, M.,Srivastava, S.K.,Samantaray, B.K.,Bhowmick, A.K. The Polymer Society of Korea 2003 Macromolecular Research Vol.11 No.4
Ethylene vinyl acetate (EVA)/clay nanocomposites were synthesized by blending a solution of ethylene vinyl acetate copolymer containing 12% vinyl acetate abbreviated as EVA-12 in toluene and dispersion of dodecyl ammonium ion intercalated montmorillonite (l2Me-MMT) in N,N-dimethyl acetamide (DMAc). X-ray patterns of sodium montmorillonite ($Na^+$-MMT) and 12Me-MMT exhibited $d_{001}$ peak at $2{\theta}=7.4^{\circ}$ and $2{\theta}=5.6^{\circ}$ respectively; that is, the interlayer spacing of MMT increased by about 0.39 nm due to intercalation of dodecyl ammonium ions. The XRD trace of EVA showed no peak in the angular range of $3-10^{\circ}(2{\theta})$. In the XRD patterns of EVA/clay hybrids with clay content up to 6 wt% the basal reflection peak of 12Me-MMT was absent. leading to the formation of delaminated configuration of the composites. When the 12Me-MMT content was 8 wt% in the EVA-12 matrix, the hybrid revealed a peak at about $2{\theta}=5.6^{\circ}$, owing to the aggregation of aluminosilicate layers. Transmission electron microscopic photograph exhibited that an average size of 12-15 nm clay layers were randomly and homogeneously dispersed in the polymer matrix, which led to the formation of nanocomposite with delaminated configuration. The formation of delaminated nanocomposites was manifested through the enhancement of mechanical properties and thermal stability, e.g. tensile strength of an hybrid containing only 2 wt% 12Me-MMT was enhanced by about 36% as compared with neat EVA-12.
HAMILTONIAN INSERTED GRAPHS AND SQUARES
Pramanik, L.K.,Adhikari, M.R. 충청수학회 2006 충청수학회지 Vol.19 No.1
In this paper we characterize the graphs whose inserted graphs are Hamiltonian, and we study the relationship between Hamiltonian graphs and inserted graphs. Also we prove that if a connected graph G contains at least 3 vertices then inserted graph of the square of G is Hamiltonian and if G contains at least 3 edges then the square of inserted graph of G is Hamiltonian.
Pramanik, Kartick Chandra,Biswas, Ria,Mitra, Anupama,Bandyopadhyay, Durba,Mishra, Moumita,Chatterjee, Tapan Kumar Kyung Hee Oriental Medicine Research Center 2007 Oriental pharmacy and experimental medicine Vol.7 No.2
The present study focused on the establishment of micropropagation protocol for the high value Pluchea (P.) indica (L.) Less., genotype, an important medicinal plant and evaluation of the diuretic activity of the leaf extract of the tissue cultured plant. Leaf explants, nodal segments and shoot tips were cultured in MS medium supplemented with auxin and cytokinin and their combinations. With the objective of inducing callus giving rise to new adult plants, naphthalene acetic acid was found to be most effective for (80%) for callus induction. The methanolic extract of leaves of the micropropagated P. indica was investigated for its diuretic activity in Wistar albino rats. Urinary excretion parameters were studied for evaluation of diuretic activity using Frusemide (20 mg/kg, p.o.) as standard. The extract showed significant diuretic activity at the doses of 100, 200 and 300 mg/kg. p.o. An oral acute toxicity study for the extract was carried out and the $LD_{50}$ value was found to be 2,825 mg/kg body weight.
Implications of bi-directional interaction on seismic fragilities of structures
Pramanik, Debdulal,Banerjee, Abhik Kumar,Roy, Rana Techno-Press 2016 Coupled systems mechanics Vol.5 No.2
Seismic structural fragility constitutes an important step for performance based seismic design. Lateral load-resisting structural members are often analyzed under one component base excitation, while the effect of bi-directional shaking is accounted per simplified rules. Fragility curves are constructed herein under real bi-directional excitation by a simple extension of the conventional Incremental Dynamic Analysis (IDA) under uni-directional shaking. Simple SODF systems, parametrically adjusted to different periods, are examined under a set of near-fault and far-fault excitations. Consideration of bi-directional interaction appears important for stiff systems. Further, the study indicates that the peak ground accelertaion, velocity and displacement (PGA, PGV and PGD) of accelerogram are relatively stable and efficient intensity measures for short, medium and long period systems respectively. '30%' combination rule seems to reasonably predict the fragility under bi-directional shaking at least for first mode dominated systems dealt herein up to a limit state of damage control.
Hypoglycemic and antihyperglycemic activity of leaf extract of pluchea indica Less
Pramanik Kartick Chandra,Bhattacharya Plaban,Biswas Ria,Bandyopadhyay Durba,Mishra Moumita,Chatterjee TK Kyung Hee Oriental Medicine Research Center 2006 Oriental pharmacy and experimental medicine Vol.6 No.3
The hypoglycemic and antihyperglycemic activity of methanolic extract of Pluchea indica Less. (Asteraceae) (MEPI) leaves were studied in normal rats and in streptozotocin induced diabetic rats respectively. The blood glucose levels were measured at 1, 4, 8, 16 and 24 h intervals after the treatment. The MEPI leaves showed reduction in blood glucose level in normal (35.12% and 36.01 % for 200 and 400 mg/kg, p.o. respectively) and in steptozotocin induced diabetic rats (36.10% and 41.87% for 200 and 400 mg/kg respectively). A toxicity study has been performed for the extract, which revealed that the extract is safe to use even at the doses of 3.2 gm/kg of body weight orally.
Pramanik, Anup,Kang, Hong Seok American Chemical Society 2011 JOURNAL OF PHYSICAL CHEMISTRY C - Vol.115 No.22
<P>On the basis of the PBE-D2 calculation that empirically includes van der Waals interaction to the standard GGA approximation of Perdew, Berke, and Ernzerhof, we have investigated the adsorption of paramagnetic O<SUB>2</SUB> and NO on pristine, N-doped, and P-doped graphene. We found that the van der Waals interaction makes an important contribution to the physisorption energy and to the adsorption geometry of these gases in pristine and N-doped graphene. A detailed band-structure calculation shows that the electrostatic interaction due to charge transfer is also important, causing their adsorption on 2N-doped graphene to be appreciably stronger than that on pristine graphene or 1N-doped graphene. In the case of the adsorption of two molecules on 2N-doped graphene, spins of two adsorbed molecules couple differently depending upon the kind of gas molecules. Meanwhile, chemisorption of two O<SUB>2</SUB> atoms leaves the 2P-doped graphene a nonmagnetic semiconductor, while adsorption of two NO molecules turns the system into a magnetic semiconductor.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/jpccck/2011/jpccck.2011.115.issue-22/jp200783b/production/images/medium/jp-2011-00783b_0004.gif'></P>
Pramanik, P.,Haque, Md.M.,Kim, P.J. Elsevier 2013 Agriculture, ecosystems & environment Vol.178 No.-
Leguminous cover crops like hairy vetch (Vicia villosa) is generally grown as winter cover crop in the rice paddy fields of tropical countries like South Korea and Japan. The leguminous cover crops are preferably cultivated due to their N-fixing ability by nodule formation. However, the interactions of nodule formation in hairy vetch roots and increased soil nitrate-N content due to hairy vetch cultivation with emissions of greenhouse gases especially nitrous oxide (N<SUB>2</SUB>O) during successive rice cultivation were not studied before. For this study, hairy vetch was harvested 1 week (204D), 2 weeks (197D), 3 weeks (190D) and 4 weeks (183D) before succeeding rice seedling transplanting and nodule characteristics of hairy vetch were compared with soil nitrate-N content and N<SUB>2</SUB>O emission during rice cultivation. Number and weight of nodules were increased with increasing age of hairy vetch and that in turn enhanced nitrogenase activity of nodules. The highest soil NO<SUB>3</SUB>-N content of 204D treatment might be attributed to the highest nitrogenase activity in the roots of 204 days old hairy vetch plants. The enhanced N<SUB>2</SUB>O emission from rice paddy soil due to longer hairy vetch cultivation as winter cover crop indicated that the age of leguminous cover crops is an important factor to determine the global warming during succeeding rice cultivation. Cultivation of hairy vetch for 197 days was probably the best practice to minimize adverse effect of N-fixation on N<SUB>2</SUB>O emission from rice paddy soils.
Pramanik, Subhamay,Bhalla, Vandana,Kim, Hwan Myung,Singh, Hardev,Lee, Hyo Won,Kumar, Manoj The Royal Society of Chemistry 2015 Chemical communications Vol.51 No.85
<P>Supramolecular aggregates of hexaphenylbenzene derivative <B>2</B> exhibit aggregation induced emission enhancement and modulation of self-assembled architecture from spherical to flower-like assembly in the presence of H<SUB>2</SUB>S. Furthermore, probe <B>2</B> displays higher photostability, low toxicity and bright green fluorescence in two-photon microscopy (TPM) imaging for the detection of H<SUB>2</SUB>S in live HeLa cells.</P> <P>Graphic Abstract</P><P>AIEE active HPB based TPE probe exhibited modulation of self-assembled architecture in presence of H<SUB>2</SUB>S and was utilized for TPM imaging for detection of H<SUB>2</SUB>S in HeLa cells. <IMG SRC='http://pubs.rsc.org/services/images/RSCpubs.ePlatform.Service.FreeContent.ImageService.svc/ImageService/image/GA?id=c5cc05406k'> </P>