Institution
University of Calcutta
Education•Kolkata, India•
About: University of Calcutta is a education organization based out in Kolkata, India. It is known for research contribution in the topics: Population & Catalysis. The organization has 8900 authors who have published 19712 publications receiving 259067 citations. The organization is also known as: Calcutta University & CU.
Papers published on a yearly basis
Papers
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TL;DR: This study demarcates factors at the sub-city level that tend to jeopardize the two mandatory precautionary measures during COVID-19 – Social Distancing and Lockdown through a Covid Vulnerability Index and identifies the gaps that need to be plugged for the pandemic cities of now and of the future.
119 citations
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TL;DR: An overall 57% diminution in mean sperm concentration over the past 35 years is identified, which, when analyzed for each geographical region, identified a significant decline in North America, Europe, Asia, and Africa.
Abstract: Reports regarding the changes in sperm concentration in different counties of the world are inconsistent. Furthermore, the reports that sprung up from specific epidemiological and experimental examinations did not include data of prior studies or geographical variations. The current study, following a previous report of massive fall in semen volume over the past 33 years, attempts to delineate the trend of altering sperm concentrations and factors responsible for this by reviewing article published from 1980 to July 2015 with geographic differences. The current study identified an overall 57% diminution in mean sperm concentration over the past 35 years ( r = -.313, p = .0002), which, when analyzed for each geographical region, identified a significant decline in North America, Europe, Asia, and Africa. An increasing trend of sperm concentration was identified only in Australia. The association of male age with such a trend ( R2 = .979) is reported. The authors also correlated male fertility with sperm concentration. Thus, this comprehensive, evidence-based literature review aims to concisely and systematically present the available data on sperm concentration from 1980 to 2015, as well as to statistically analyze the same and correlate male health with the declining pattern of sperm count in a single scientific review to serve the scientific research zone related to reproductive health. It points to the threat of male infertility in times ahead.
119 citations
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Education and Research Network1, University of Vienna2, Kyoto University3, University of South Florida4, University of Padua5, Tulane University6, University of Delhi7, Tehran University of Medical Sciences8, Yarmouk University9, University of Calcutta10, Monterrey Institute of Technology and Higher Education11, University of Otago12, University of Texas Health Science Center at San Antonio13, Minia University14, Indian Institute of Chemical Technology15, Ulster University16, Patna University17, Indian Statistical Institute18, Federal University of Rio de Janeiro19, Universidad Católica de Valencia San Vicente Mártir20, University of Pittsburgh21, Michigan State University22
TL;DR: Severe acute respiratory syndrome coronavirus 2 pandemic capacity is derived from the unique structural features on its spike protein: fast viral surfing over the epithelium with flat N‐terminal domain, tight binding to ACE2 entry receptor, and furin protease utilization.
Abstract: Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) is the causative agent of the pandemic coronavirus disease 2019 (COVID-19) that exhibits an overwhelming contagious capacity over other human coronaviruses (HCoVs). This structural snapshot describes the structural bases underlying the pandemic capacity of SARS-CoV-2 and explains its fast motion over respiratory epithelia that allow its rapid cellular entry. Based on notable viral spike (S) protein features, we propose that the flat sialic acid-binding domain at the N-terminal domain (NTD) of the S1 subunit leads to more effective first contact and interaction with the sialic acid layer over the epithelium, and this, in turn, allows faster viral 'surfing' of the epithelium and receptor scanning by SARS-CoV-2. Angiotensin-converting enzyme 2 (ACE-2) protein on the epithelial surface is the primary entry receptor for SARS-CoV-2, and protein-protein interaction assays demonstrate high-affinity binding of the spike protein (S protein) to ACE-2. To date, no high-frequency mutations were detected at the C-terminal domain of the S1 subunit in the S protein, where the receptor-binding domain (RBD) is located. Tight binding to ACE-2 by a conserved viral RBD suggests the ACE2-RBD interaction is likely optimal. Moreover, the viral S subunit contains a cleavage site for furin and other proteases, which accelerates cell entry by SARS-CoV-2. The model proposed here describes a structural basis for the accelerated host cell entry by SARS-CoV-2 relative to other HCoVs and also discusses emerging hypotheses that are likely to contribute to the development of antiviral strategies to combat the pandemic capacity of SARS-CoV-2.
119 citations
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TL;DR: Two linear, trinuclear mixed-valence complexes, Co-II{(mu-L-1)(mu-OAc)Co-III (OAc)}(2)] and Co-III{L-3)(OAc)] were prepared and the molecular structures of 1, 2 and 4 elucidated on the basis of X-ray crystallography.
Abstract: Two linear, trinuclear mixed-valence complexes, [Co-II{(mu-L-1)(mu-OAc)Co-III (OAc)}(2)] (1) and [Co-II(mu-L-2) (mu-OAc)Co-III(OAc)}(2)] (2) and two mononuclear Con' complexes [Co-III{L-3)(OAc)] (3), and [Co-III {L-4}(OAc)] (4) were prepared and the molecular structures of 1, 2 and 4 elucidated on the basis of X-ray crystallography [OAc = Acetate ion, H2L1 = H(2)Salen 1,6-bis(2-hydroxyphenyl)-2,5-diazahexa-1,5-diene, H2L2 H2Me2-Salen = 2,7-bis(2-hydroxyphenyl)-2,6-diazaocta-2,6-diene, H2L3 = H(2)Salpn = 1,7-bis(2-hydroxyphenyl)-2,6-diazahepta1,6-diene, H2L4 = H(2)Me(2)Salpn = 2,8-bis(2-hydroxyphenyl)3,7-diazanona-2,7-dienel In complexes I and 2, the acetate groups show both monodentate and bridging bidentate coordination modes, whereas chelating bidentate acetate is present in 4 The terminal (CoN2O4)-N-III centres in 1 and 2 exhibit uniform facial arrangements of both non-bridged N2O and bridging O-3 donor sets and the Co-II centre is coordinated to six (four phenoxo and two acetato) oxygen atoms of the bridging ligands The effective magnetic moment at room temperature corresponds to the presence of high-spin Coll in both 1 and 2 The complexes 1 and 2 are thus Co-III(S = 0)Co-II(S = 3/2)-Co-II(S = 0) trimers Complexes 3 and 4 are monomeric and diamagnetic containing low-spin Co-III(S = 0) with chelating tetradentate Schiff base and bidentate acetate Calculations based on DFT rationalise the formation of trinuclear or monomiclear complexes (C) Wiley-VCH Verlag GmbH & Co KGaA, 69451 Weinheim, Germany, 2008)
118 citations
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TL;DR: This review mainly focuses on the effort of better understanding the host–pathogen relationship, finding the gene loci/markers imparting resistance response and modifying the host genome through transgenic development.
Abstract: Rice sheath blight disease, caused by the basidiomycetous necrotroph Rhizoctonia solani,
became one of the major threats to the rice cultivation worldwide, especially after the adoption
of high-yielding varieties. The pathogen is challenging to manage because of its extensively
broad host range and high genetic variability and also due to the inability to find any satisfactory
level of natural resistance from the available rice germplasm. It is high time to find remedies to
combat the pathogen for reducing rice yield losses and subsequently to minimize the threat to
global food security. The development of genetic resistance is one of the alternative means to
avoid the use of hazardous chemical fungicides. This review mainly focuses on the effort of
better understanding the host–pathogen relationship, finding the gene loci/markers imparting
resistance response and modifying the host genome through transgenic development. The latest
development and trend in the R. solani–rice pathosystem research with gap analysis are
provided.
118 citations
Authors
Showing all 9026 results
Name | H-index | Papers | Citations |
---|---|---|---|
Sukalyan Chattopadhyay | 106 | 756 | 37548 |
Arun Majumdar | 102 | 459 | 52464 |
Sajal K. Das | 85 | 1124 | 29785 |
Debashish Bhattacharya | 77 | 318 | 18541 |
Hari M. Srivastava | 76 | 1126 | 42635 |
Sankar Mitra | 73 | 260 | 17830 |
Maurizio D'Incalci | 72 | 581 | 20379 |
Sankar K. Pal | 70 | 446 | 23727 |
Sondipon Adhikari | 62 | 457 | 13707 |
Lalji Singh | 60 | 297 | 13821 |
Kalipada Pahan | 59 | 223 | 10638 |
Tapas K. Hazra | 57 | 107 | 9034 |
Sushil K. Mahata | 55 | 263 | 9542 |
Suman Chakraborty | 53 | 664 | 11769 |
Samir Kumar Pal | 52 | 356 | 10901 |