Chakravorty A.,Sripat Singh College |
Ghosh P.,University of KalyaniWest Bengal
Journal of Central European Agriculture | Year: 2014
Yield component analysis provides a framework for identifying potentially useful traits for yield improvement. A field experiment was conducted for two consecutive years to evaluate the forty four low land traditional rice cultivars for twenty three panicle yield and its attributing traits during kharif season at the Zonal Adaptive Research Station, Krishnagar, Nadia, West Bengal, India. Significant varietal differences were observed for all the characters. Among the panicle yield attributing traits, number of primary branches per panicle, number of grains on primary branches panicle-1, number of spikelets on primary branches panicle-1, grain length, grain breadth, grain thickness, kernel breadth, kernel thickness, 100 grain weight, 100 kernel weight correlated significantly and positively with panicle yield both at the genotypic and phenotypic levels. Results of path analysis showed that the direct positive effect on panicle yield was greatest for number of spikelets on secondary branches panicle-1 (0.998) which is followed by number of grains on secondary branches panicle-1 (0.948), grain length (0.755), and number of spikelets on primary branches panicle-1 (0.625), grain thickness (0.392) and fertility % of spikelets on primary branches panicle-1 (0.378). Few characters like number of primary branches panicle-1, number of spikelets panicle-1, by number of grains on primary branches panicle-1 and grain breadth showed negative direct effect on panicle yield even though the genotypic correlation coefficients on panicle yield were positive. The study revealed that the direct selection of the above said traits might be rewarding for panicle yield improvement since they revealed a true relationship with the panicle yield. ©2014 University of Zagreb - Faculty of Agriculture.All rights reserved.
Dey B.,Jadavpur University |
Das A.,Jadavpur University |
Choudhury S.R.,Jadavpur University |
Jana A.D.,Sripat Singh College |
And 3 more authors.
Inorganica Chimica Acta | Year: 2010
One hetero-bimetallic Cu(II)/Cd(II) compound, [CdII(H2O)2][CuII(mal)2(H2O)2]n (1) (H2mal = malonic acid) has been synthesized and characterized using single crystal X-ray crystallography, thermogravimetric (TG) studies and X-ray powder diffraction (XRPD) measurements. The compound crystallizes in orthorhombic Pbcn space group having cell dimensions a = 6.6260(12) Å, b = 13.958(2) Å and c = 13.052(2) Å. The solid state structure of compound 1 demonstrates a 3D pillared layered coordination network generated through the simultaneous bridging as well as chelating mode of malonate towards the Cd(II) and Cu(II), respectively. TG analysis reveals relatively high thermal stability for the compound (decomposition temperature ∼320 °C). The thermal study also reveals that the coordinated waters attached to both the metal centers (Cd(II) and Cu(II)) are reversibly lost and gained and this behavior is also corroborated by XRPD studies. © 2009 Elsevier B.V. All rights reserved.
Saha I.,Presidency University of India |
Saha I.,Sripat Singh College |
Gupta K.,Presidency University of India |
Chakraborty S.,Kanchrapara College |
And 2 more authors.
Journal of Industrial and Engineering Chemistry | Year: 2014
This study investigates the adsorption of As(III) on β-cyclodextrin modified hydrous ferric oxide (HCC). This is characterized by XRD, FESEM, AFM, XPS, BET, surface site concentration and FTIR. The modification of hydrous ferric oxide (HFO) surface by β-cyclodextrin provides ample OH groups which in turn increase As(III) adsorption on HCC compared to HFO. The adsorption remains almost constant in pH range 3-8 which decreases at higher pH (>8) and followed monolayer and pseudo first order kinetics. It is spontaneous at 303. K with increasing entropy and decreasing enthalpy. Thus HCC is found to be more efficient adsorbent than HFO. © 2013 The Korean Society of Industrial and Engineering Chemistry.
Uzzal Afsan B.M.,Sripat Singh College
Journal of Advanced Research in Dynamical and Control Systems | Year: 2015
In this paper, we have initiated two concepts of topological H-entropy for topological H-dynamical system and H-closed H-dynamical system based on H- sets  and H-closed topological space  which generalize the notions of topological entropy introduced by Adler et. al.  and Liu et. al.  along with their several properties. We have shown that the two concepts of topological H-entropy are equivalent for H-closed H-dynamical system. These besides, we have established the relationship of topological H-entropy with the topological entropy due to Adler et. al.  and due to Liu et. al. . © 2015 Institute of Advanced Scientific Research.
Co-operation of π⋯π, Cu(II)⋯π, carbonyl⋯π and hydrogen-bonding forces leading to the formation of water cluster mimics observed in the reassessed crystal structure of [Cu(mal)(phen)(H2O)]2·3H2O (H2mal = malonic acid, phen = 1,10-phenanthroline)
Choudhury S.R.,Jadavpur University |
Lee H.M.,National Changhua University of Education |
Hsiao T.-H.,National Changhua University of Education |
Colacio E.,University of Granada |
And 2 more authors.
Journal of Molecular Structure | Year: 2010
A copper(II) malonate complex with formula [Cu(mal)(phen)(H2O)]2·3H2O (1) [H2mal = malonic acid, phen = 1,10-phenanthroline] has been synthesized and its crystal structure has been re-determined with an improved R value (the compound 1 was originally synthesized and crystallographically characterized by Kwik et al. with R = 0.047, see: J. Chem. Soc. Dalton Trans. (1986) 2529) with the water hydrogen atom positions located. This has led to the revelation that the water molecules organize around the carboxylate group of the malonate ligand forming tetramer, hexamer and octameric water cluster mimics. These cooperative hydrogen-bonding forces and various π-forces (π⋯π, Cu(II)⋯π, carbonyl⋯π) involving 1,10-phenanthroline aromatic rings determine the overall packing of the molecular units in the unit cell. There exists two identical monomers in the asymmetric unit with Z// = 2. TG measurements reveal the loss of water molecules that are all released at 120 °C. The water sorption/desorption process is reversible as supported by FTIR spectroscopic and XRPD studies. © 2010 Elsevier B.V. All rights reserved.