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Consolidation and Permeability Properties of Pusan Clay at the Pusan New Port
K.Ganapathi Rao,Chung, S.G.,M. Suneel 東亞大學校 建設技術硏究所 2005 硏究論文集 Vol.28 No.2
Large reclamation projects have been carried out in the western marginal area of the Nakdong River Estuary where are located at Busan city and its vicinity, South Korea, since late 1990s. In the area studied clay deposits are unusually thick, varying from 20m to 70m in thickness. The consolidation and permeability characteristics of these clays were investigated by laboratory tests. The coefficients of consolidation and permeability of the clays in the vertical and horizontal directions were investigated by oedometer, constant rate of strain (CRS) and CRS tests with outward radial drainage. It is found from the test results that theseclays have a specific stress-strain relationship depending on the strain rate history and depositional environment, as well as a variation of permeability anisotropy during consolidation.
Veerappan, Ganapathy,SunyoungYoo, Ganapathy,Zhang, Kan,Ma, Ming,Kang, Byoungwoo,Park, Jong Hyeok Elsevier 2016 ELECTROCHIMICA ACTA Vol.214 No.-
<P><B>Abstract</B></P> <P>To the best of our knowledge, this is first report about composite of perovskite materials and reduced graphene oxide as anode material for high performance lithium ion battery (LIB). Here, we report outstanding specific capacities and cyclic stabilities of perovskite BaSnO<SUB>3</SUB> nanoparticles (NPs), decorated on 2D graphene sheets. Electrochemical measurements show that the composite BaSnO<SUB>3</SUB>/rGO20 (20wt.%rGO) delivered a highest capacity of 1200mAhg<SUP>−1</SUP> at a current rate of 0.5C (650mAg<SUP>−1</SUP>), which is comparatively much higher than individual pristine BaSnO<SUB>3</SUB> and graphene anodes. The BaSnO<SUB>3</SUB>/rGO composite anode exhibits a very high rate capability even at the 10C discharge rate (1059mAhg<SUP>−1</SUP>) and outstanding long-term stability. Notably, the composite anode material maintains its discharge capacity even after 100 cycles.</P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>
Ganapathy, Jagadeesan,Pramesh, M.,Perumal, P.T.,Sanmargam, Aravindhan The Basic Science Institute Chosun University 2015 조선자연과학논문집 Vol.8 No.3
In view of the growing medicinal importance of pyrazole and its derivatives, the single crystal X-ray diffraction study was carried out for the potential active 2-Benzyl-3-[3-(4-bromo-phenyl)-1-phenyl-1H-pyrazol-4yl]-4,6-dioxo-5-phenyl-octahydro-pyrrolo[3,4-C]pyrrole-1-carboxylic acid ethyl ester ($C_{37}H_{31}BrN_4O_4$, H2O). In the title compound are two molecules exist in the asymmetric unit. It crystallizes in the monoclinic space group $P{\hat{i}}$ with unit cell dimension $a=13.361(18){\AA}$, $b=13.424(17){\AA}$ and $c=21.649(2){\AA}$ [${\alpha}=80.745(9)^{\circ}$, ${\beta}=79.770(10)^{\circ}$ and ${\gamma}=60.788(6)^{\circ}$]. The pyrazole ring adopts planar conformation. The sum of the bond angles at nitrogen atom of the pyrazole ring indicates the $Sp^2$ hybridized state. The crystal structure is stabilized by intramolecular C-H...O hydrogen bond interaction.
Ganapathy, Jagadeesan,Sivakumar, G.,Manickam, Bakthadoss,Sanmargam, Aravindhan The Basic Science Institute Chosun University 2015 조선자연과학논문집 Vol.8 No.1
In view of the growing medicinal importance of chromene and its derivatives, the single crystal X-ray diffraction study was carried out for the potential active 4,6-dimethyl-9-phenyl-8,12-dioxa-4,6-diazatetracyclo [8.8.0.02,7.013,18]octadeca-2(7),13,15,17-tetraene-3,5,11-trione-2-ethoxyphenyl (2E)-but-2-enoate ($C_{18}H_{20}N_2O_5$). In the title compound are two molecules exist in the asymmetric unit. It crystallizes in the monoclinic space group $P2_1/c$ with unit cell dimension a=14.608(3) ${\AA}$, b=12.845(3) and c= 17.781(4) [alpha & gamma=$90^{\circ}$ beta=$91.233(5)^{\circ}$]. Both pyran and pyran ring of the chromene moiety adopts sofa conformation in the molecule A & B. The crystal structure is stabilized by intramolecular C-H...O hydrogen bond interaction.
Crystal Structure Analysis of Methyl-3-phenyl-3H-chromeno[4,3-c]isoxazole-3a(4H)-carboxylate
Ganapathy, Jagadeesan,Srinivasan, J.,Manickam, Bakthadoss The Basic Science Institute Chosun University 2015 조선자연과학논문집 Vol.8 No.3
The crystal structure of the potential active methyl-3-phenyl-3H-chromeno[4,3-c]isoxazole-3a(4H)-carboxylate ($C_{18}H_{15}NO_4$) has been determined from single crystal X-ray diffraction data. In the title compound crystallizes in the orthorombic space group $P2_12_12_1$ with unit cell dimension $a=9.8320(17){\AA}$, $b=9.9890(18){\AA}$ and $c=15.588(3){\AA}$ [${\alpha}=90^{\circ}$, ${\beta}=90^{\circ}$ and ${\gamma}=90^{\circ}$]. In the structure chromene, isoxazole and carboxylate are almost coplanar each other. All geometrical parameters revelled that chromene ring of pyran ring adopt sofa conformation. The crystal packing is stabilized by intermolecular C-H...O and C-H...N hydrogen bond interaction.
Ganapathi Rao Gajula,Lakshmi Rekha Buddiga 한국전기전자재료학회 2023 Transactions on Electrical and Electronic Material Vol.24 No.1
Gd/Nb substituted BaTiO3 –Li 0.5 Fe 2.5 O 4 (BLF) composite ceramics are prepared using conventional solid state technique. The structural properties like XRD to identify the structure of composites, morphological studies to describe surface morphology, estimate grain size of the composites and electric properties at high frequencies are investigated. The XRD reveals Gd/Nb substituted BLF composite confirm the tetragonal crystal structure without phase change. The morphology studies confirm that the BLF composite exhibit larger grains which are surrounded by smaller grains in different angular shapes with low pores. The impedance of all composites shows maximum followed by complex behaviour which is due to relaxation of domain motion. The capacitance of BLF composite decrease by doping with Gd/Nb in BLF over the frequency region between 1 MHz and 1 GHz. The conductance peak of composite shifted towards lower and higher frequencies due to substitution of Gd/Nb. The real part of electric modulus (M′) shows complex behaviour beyond 1 GHz. The imaginary part of Electric Modulus (M′′) of all composites are frequency independent from 1 MHz to 1 GHz.
Comparative dynamic studies of thick laminated composite shells based on higher-order theories
Ganapathi, M.,Patel, B.P.,Pawargi, D.S.,Patel, H.G. Techno-Press 2002 Structural Engineering and Mechanics, An Int'l Jou Vol.13 No.6
Here, the dynamic response characteristics of thick cross-ply laminated composite cylindrical shells are studied using a higher-order displacement model. The formulation accounts for the nonlinear variation of the in-plane and transverse displacements through the thickness, and abrupt discontinuity in slope of the in-plane displacements at any interface. The effect of inplane and rotary inertia terms is included. The analysis is carried out using finite element approach. The influences of various terms in the higher-order displacement field on the free vibrations, and transient dynamic response characteristics of cylindrical composite shells subjected to thermal and mechanical loads are analyzed.
Ganapathy, Jagadeesan,Damodharan, Kannan,Manickam, Bakthadoss,Sanmargam, Aravindhan The Basic Science Institute Chosun University 2014 조선자연과학논문집 Vol.7 No.3
The crystal structure of the title compounds with both coumarin and sulfonamide moieties were examined. These two groups have very special for their pharmaceutical and medicinal properties have been determined from single crystal X-ray diffraction data. In the title compound crystallizes in the monoclinic space group $P2_1/c$ with unit cell dimension a=$8.5775(4){{\AA}$, b=$24.9943(13){\AA}$ and c=$13.7319(7){\AA}$ [alpha & gamma=$90^{\circ}$ beta=$103.558(2)^{\circ}$]. In the structure The S1 atom shows a distorted tetrahedral geometry, with O1-S1-O2 [$121.08(1)^{\circ}$] and N1-S1-C5 [$105.85(1)^{\circ}$] angles deviating from ideal tetrahedral values are attributed to the Thrope-Ingold effect. The sum of bond angles around N1 ($354.9^{\circ}$) indicates that N1 is in $sp^2$ hybridization. The Pyridine ring adopts boat conformation and pyran rings adopt a sofa conformation. Crystal structure is stabilized by C-H...O intra molecular hydrogen bond interactions.
Ganapathy, Jagadeesan,Govindhan, Suresh,Sanmargam, Aravindhan The Basic Science Institute Chosun University 2014 조선자연과학논문집 Vol.7 No.3
Pyrazole, hydroxyimino, aldehyde and isoxazole derivatives exhibit a broad spectrum of biological activities such as antimicrobial, anti-inflammatory and antitumor activities. With growing application on their synthesis and bioactivity, chemists and biologists in recent years have considerable attention on the research of these derivatives. In the view of potential importance of these derivatives, we have crystallized few of the derivatives and its report has been published. The present study focuses on docking studies of these derivatives against Phospholipases $A_2$ enzyme. This enzymes has implicated as potential targets for anti-inflammatory drug design. co-crystal structure (PDB ID: 1POE) of $PLA_2$ deposited in Protein Data Bank has been retrieved for docking analysis. Docking studies using Schrodinger's GLIDE reveals that these derivatives shows better binding energy and score in the defined active site. These results may provide a guiding role to design a lead molecule which may reduce inflamation.