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Patra, Srikanta,Yang, Hae-Sik Korean Chemical Society 2009 Bulletin of the Korean Chemical Society Vol.30 No.7
A facile, seed-mediated preparation method of trimetallic Au@Pb@Pt core-shell nanoparticles is developed. Au nanoparticles are the template seeds onto which sequentially reduced Pb and Pt are deposited. The trimetallic core-shell structure is confirmed by UV-Vis spectroscopy, TEM and EDS analysis, and cyclic voltammetry. The trimetallic Au@Pb@Pt core-shell nanoparticles show high electrocatalytic activity for formic acid and methanol electrooxidation.
Srikanta Patra,양해식 대한화학회 2009 Bulletin of the Korean Chemical Society Vol.30 No.7
A facile, seed-mediated preparation method of trimetallic Au@Pb@Pt core-shell nanoparticles is developed. Au nanoparticles are the template seeds onto which sequentially reduced Pb and Pt are deposited. The trimetallic core-shell structure is confirmed by UV-Vis spectroscopy, TEM and EDS analysis, and cyclic voltammetry. The trimetallic Au@Pb@Pt core-shell nanoparticles show high electrocatalytic activity for formic acid and methanol electrooxidation.
Freshwater fish resource mapping and conservation strategies of West Bengal, India
Bidhan Chandra Patra,Avijit Kar,Manojit Bhattacharya,Srikanta Parua,Pravat Kumar Shit 대한공간정보학회 2017 Spatial Information Research Vol.25 No.5
Explorations and Germplasm estimation of fish biodiversity in the freshwater bodies of India are being gradually updated and analysed with a number of new discoveries though a well-defined figure of existing freshwater fish species at regional and state level remains to be calculated. The freshwater resources of India are currently experiencing an alarming decline trend in term of piscine biodiversity due to several undesired factors and consequences a considerable portion of freshwater fishes have been categorized as Threatened category. West Bengal is now becomes one of the most significant states of freshwater fish producer in India. The research study workout and divide the West Bengal state into six major physiographic divisions along with the help of modern Geoinformatics techniques (ArcGIS 10.2, Google Earth and Global Mapper software for map making purpose). The present study deals with the freshwater fish resource, distribution and biodiversity assessment of entire part of West Bengal. Occurrence of 251 fish species belonging to 15 orders, 50 families have been noted during the study period of 2012–2016. It is evident that the members belonging to Cyprinifomes constitute 37% of the total fish fauna of the river. Fluctuation in occurrence and abundance of the species are influenced by several anthropogenic activities. The demand of proper management of conservation policy is highlights through our research work.
Tripathy, Suman Kumar,De, Umasankar,Dehury, Niranjan,Pal, Satyanarayan,Kim, Hyung Sik,Patra, Srikanta The Royal Society of Chemistry 2014 Dalton Transactions Vol.43 No.39
<P>Phpy bridged homodinuclear Ru–Ru (<B>1</B>) and heterodinuclear Ir–Ru complexes (<B>2</B>) have been developed. Complex <B>2</B> induces autophagy towards the cisplatin resistant human breast cancer (MCF7) cell line, whereas <B>1</B> is inactive.</P> <P>Graphic Abstract</P><P>Heterodinuclear Ir–Ru (<B>2</B>) with polypyridyl based phpy ligand shows autophagy induced cell death, whereas homodinuclear Ru–Ru (<B>1</B>) is inactive. <IMG SRC='http://pubs.rsc.org/services/images/RSCpubs.ePlatform.Service.FreeContent.ImageService.svc/ImageService/image/GA?id=c4dt01033g'> </P>
Tripathy, Suman Kumar,De, Umasankar,Dehury, Niranjan,Laha, Paltan,Panda, Manas Kumar,Kim, Hyung Sik,Patra, Srikanta The Royal Society of Chemistry 2016 Dalton Transactions Vol.45 No.38
<P>Six mononuclear Ir complexes (1-6) using polypyridyl-pyrazine based ligands (L-1 and L-2) and {[cp*IrCl-(mu-Cl)](2) and [(ppy)(2)Ir(mu-Cl)](2)} precursors have been synthesised and characterised. Complexes 1-5 have shown potent anticancer activity against various human cancer cell lines (MCF-7, LNCap, Ishikawa, DU145, PC3 and SKOV3) while complex 6 is found to be inactive. Flow cytometry studies have established that cellular accumulation of the complexes lies in the order 2 > 1 > 5 > 4 > 3 > 6 which is in accordance with their observed cytotoxicity. No changes in the expression of the proteins like PARP, caspase 9 and beclin-1, Atg12 discard apoptosis and autophagy, respectively. Overexpression of CHOP, activation of MAPKs (P38, JNK, and ERK) and massive cytoplasmic vacuolisation collectively suggest a paraptotic mode of cell death induced by proteasomal dysfunction as well as endoplasmic reticulum and mitochondrial stress. An intimate relationship between p53, ROS production and extent of cell death has also been established using p53 wild, null and mutant type cancer cells.</P>