Quantum chemical study of the isomerization of 24-methylenecycloartanol, a potential marker of olive oil refining.

abstract：:The present study reports the geometry, electronic structure and properties of neutral and anionic transition metal (TM = Ti, Zr and Hf)) doped germanium clusters containing 1 to 20 germanium atoms within the framework of linear combination of atomic orbitals density functional theory under spin polarized generalized ...

journal_title：Journal of molecular modeling

authors： Kumar M,Bhattacharyya N,Bandyopadhyay D

更新日期：2012-01-01 00:00:00

abstract：:Ab initio calculations have been performed using the complete basis set model (CBS-QB3) to study the reaction mechanism of butane radical (C(4)H(9)•) with oxygen (O(2)). On the calculated potential energy surface, the addition of O(2) to C(4)H(9)• forms three intermediates barrierlessly, which can undergo subsequent i...

journal_title：Journal of molecular modeling

authors： Du HC,Gong XD

更新日期：2012-05-01 00:00:00

abstract：:To date, no suitable vaccine or specific antiviral drug is available to treat Chikungunya viral (CHIKV) fever. Hence, it is essential to identify drug candidates that could potentially impede CHIKV infection. Here, we present the development of a homology model of nsP2 protein based on the crystal structure of the nsP...

journal_title：Journal of molecular modeling

authors： Singh KhD,Kirubakaran P,Nagarajan S,Sakkiah S,Muthusamy K,Velmurgan D,Jeyakanthan J

更新日期：2012-01-01 00:00:00

abstract：:It is well-established that many covalently-bonded atoms of Groups IV-VII have directionally-specific regions of positive electrostatic potential (σ-holes) through which they can interact with negative sites. In the case of Group VII, this is called "halogen bonding." We have studied two series of molecules: the F3MX ...

journal_title：Journal of molecular modeling

authors： Bundhun A,Ramasami P,Murray JS,Politzer P

更新日期：2013-07-01 00:00:00

abstract：:A coarse-grained Brownian dynamics model was used to simulate two proteins of similar sizes inside model membrane pores of varying size and hydrophobicity. The two proteins, which have radii of gyration of approximately 9.5 Å in their native states, are a 36-residue hydrophilic villin head piece (HP-36) and a 40-resid...

journal_title：Journal of molecular modeling

authors： Zhang Y,Zhang Y,McCready MJ,Maginn EJ

更新日期：2019-04-25 00:00:00

abstract：:Human dihydrofolate reductase-like 1 (DHFRL1) has been identified as a second human dihydrofolate reductase (DHFR) enzyme. Although DHFRL1 have high sequence homology with human DHFR, dihydrofolate (DHF) exhibits a lowered binding affinity to DHFRL1 and the corresponding molecular mechanism is still unknown. To addres...

journal_title：Journal of molecular modeling

authors： Gao J,Cui W,Du Y,Ji M

更新日期：2013-12-01 00:00:00

abstract：:We report a study of the structure of (+)-catechin, which belongs to the family of the flavan-3-ols-one of the five most widely distributed phenolic groups. The biological activities and pharmaceutical utility of these compounds are related to antioxidant activity due to their ability to scavenge free radicals. A brea...

journal_title：Journal of molecular modeling

authors： Bentz EN,Pomilio AB,Lobayan RM

更新日期：2014-02-01 00:00:00

abstract：:Cyclooxygenase (COX) enzymes catalyse the biosynthesis of prostaglandins and thromboxane from arachidonic acid (AA). We summarize in this paper, the development of pharmacophores of a dataset of inhibitors for COX-2 by using the Catalyst/Hypogen module using six chemically diverse series of compounds. Training set con...

journal_title：Journal of molecular modeling

authors： Chopra M,Gupta R,Gupta S,Saluja D

更新日期：2008-11-01 00:00:00

abstract：:The effects of different monoterpenes and 2-cyclohexen-1-one on the antibacterial activity of nitrofurantoin against resistant Enterobacter cloacae, were compared and the minimal structural component of monoterpene required for the highest level of resistance-modulating activity was determined. Subinhibitory concentra...

journal_title：Journal of molecular modeling

authors： Shahverdi AR,Mirzaie S,Rafii F,Kakavand M,Foroumadi A

更新日期：2015-08-01 00:00:00

abstract：:Ethanol and water are the solvents most commonly used to extract flavonoids from propolis. Do hydrogen-bonding interactions exist between flavonoids and ethanol/water? In this work, this question was addressed by using density functional theory (DFT) to provide information on the hydrogen-bonding interactions between ...

journal_title：Journal of molecular modeling

authors： Zheng YZ,Zhou Y,Liang Q,Chen DF,Guo R

更新日期：2016-04-01 00:00:00

abstract：:The DFT potential energy hypersurfaces of closed-shell nitrogen clusters up to ten atoms are explored via a genetic algorithm (GA). An atom-atom distance threshold parameter, controlled by the user, and an "operator manager" were added to the standard evolutionary procedure. Both B3LYP and PBE exchange-correlation fun...

journal_title：Journal of molecular modeling

authors： Silva MX,Silva FT,Galvão BRL,Braga JP,Belchior JC

更新日期：2018-07-07 00:00:00

abstract：:A density functional theory augmented by the long-range corrected hybrid density functional ωB97XD and 6-31G(d,p) basis set has been applied to generate sandwich structures consist of nanocomposites between graphene oxide and polyvinyl alcohol. We predicted the interaction energies and discuss the contribution of elec...

journal_title：Journal of molecular modeling

authors： Gorb L,Ilchenko M,Leszczynski J

更新日期：2020-06-25 00:00:00

abstract：:The average pull-out force and interaction energy of polyethylene (PE) cross-linked functionalized carbon nanotubes (cfCNTs) embedded in polymer matrices (PE-cfCNTs@polymers) was studied using molecular dynamics (MD) simulations. Accordingly, the pull-out process of PE-cfCNTs from inside polymer matrices, i.e., Aramid...

journal_title：Journal of molecular modeling

authors： Haghighi S,Ansari R,Ajori S

更新日期：2019-03-29 00:00:00

abstract：:Hydrogen dissociative chemisorption and desorption on small lowest energy Ni(n) clusters up to n=13 as a function of H coverage was studied using density functional theory. H adsorption on the clusters was found to be preferentially at edge sites followed by 3-fold hollow sites and on-top sites. The minimum energy pat...

journal_title：Journal of molecular modeling

authors： Zhou C,Yao S,Zhang Q,Wu J,Yang M,Forrey RC,Cheng H

更新日期：2011-09-01 00:00:00

abstract：:Fine-tuning of magnetic states via an understanding of spin injection on the edge of graphene nanoribbons should allow for greater flexibility of the design of graphene-based spintronics. On the basis of calculations, we predict that coupling constants of the exchange interaction in the series of nitroxide-functionali...

journal_title：Journal of molecular modeling

authors： Morozov V,Tretyakov E

更新日期：2019-02-09 00:00:00

abstract：:A theoretical investigation is completed on the mechanism of electrical breakdown strength increment of polyethylene. It is shown that it is one of the most important factors for increasing electrical breakdown strength of polyethylene through keto-enol isomerization of acetophenone and its analogues at the ground sta...

journal_title：Journal of molecular modeling

authors： Zhang H,Shang Y,Zhao H,Han B,Li Z

更新日期：2013-10-01 00:00:00

abstract：:Since the human body for many reasons can adapt and become resistant to drugs, it is important to develop and validate computer aided drug design (CADD) methods that could help predict binding affinity changes that can result from these resistant enzymes. The free energy perturbation (FEP) methodology is the most accu...

journal_title：Journal of molecular modeling

authors： Reddy RN,Mutyala RR,Aparoy P,Reddanna P,Reddy MR

更新日期：2010-02-01 00:00:00

abstract：:The p38-mitogen-activated protein kinases (p38-MAPKs) belong to a family of serine-threonine kinases activated by pro-inflammatory or stressful stimuli that are known to be involved in several diseases. Their biological importance, related to the release of inflammatory pro-cytokines such as tumor necrosis factor-alph...

journal_title：Journal of molecular modeling

authors： Romeiro NC,Albuquerque MG,de Alencastro RB,Ravi M,Hopfinger AJ

更新日期：2006-09-01 00:00:00

abstract：:Ionic liquids (ILs) have been extensively studied and are considered green solvents capable of replacing traditional organic solvents. In this study, seven 1,2,3-triazolium derivative ILs have been synthesized. In order to study the effect of the cation nature on the ILs cytotoxicity, their structures were first ident...

journal_title：Journal of molecular modeling

authors： Glanzmann N,Carmo AML,Antinarelli LMR,Coimbra ES,Costa LAS,da Silva AD

更新日期：2018-06-14 00:00:00

abstract：:The hydration free energies, structures, and dynamics of open- and closed-shell trivalent lanthanide and actinide metal cations are studied using molecular dynamics simulations (MD) based on a polarizable force field. Parameters for the metal cations are derived from an ab initio bottom-up strategy. MD simulations of ...

journal_title：Journal of molecular modeling

authors： Marjolin A,Gourlaouen C,Clavaguéra C,Ren PY,Piquemal JP,Dognon JP

更新日期：2014-10-01 00:00:00

abstract：:A theoretical study of the photoluminescence (PL) of double-walled carbon nanotubes (DWCNTs) using density functional theory (DFT) theory is reported in this work. The DWCNTs are of the armchair/armchair type and the structures studied have the arrangements (3,3)/(2,2), (8,8)/(4,4), (12,12)/(6,6), (16,16)/(8,8), (6,6)...

journal_title：Journal of molecular modeling

authors： Victoria APR,de la Luz ADH,Juárez JM,Espinosa-Torres ND,Robles-Águila MJ,López JAL,Juárez-Díaz G

更新日期：2019-08-26 00:00:00

abstract：:Detailed density functional theory (DFT) calculations on the structure and harmonic frequencies of model all-trans and all-cis polyenes were undertaken. For the first time, we report on the convergence of selected B3LYP/6-311++G** and BLYP/6-311++G** calculated structural parameters resulting from a systematic increas...

journal_title：Journal of molecular modeling

authors： Kupka T,Buczek A,Broda MA,Stachów M,Tarnowski P

更新日期：2016-05-01 00:00:00

abstract：:The mechanism of C-H bond activation of ethane was catalyzed by palladium halide cations (PdX+ (X = F, Cl, Br, H, and CH3)), which was investigated using density functional theory (DFT) at B3LYP level. The reaction mechanism was taken into account in triplet and singlet spin state potential energy surfaces. For PdF+, ...

journal_title：Journal of molecular modeling

authors： Nie YX,Zhang XX,Yuan YN,Lu F,Geng ZY

更新日期：2020-04-03 00:00:00

abstract：:The present study analyzed binding of Cu(2+) to tetrapeptides in water solution at several levels of theoretical approximation. The methods used to study the energetic and structural properties of the complexes in question include semiempirical hamiltonians, density functional theory as well as ab initio approaches in...

journal_title：Journal of molecular modeling

authors： Czyżnikowska Z,Brasuń J

更新日期：2012-04-01 00:00:00

abstract：:We report a DFT, TDDFT and DFTB investigation of the performance of two donor-π-acceptor (D-π-A)-type organic dyes bearing different electron-withdrawing groups (EWG) for dye-sensitized solar cells (DSSCs) to evaluate which EWG is better for an acrylic acid acceptor, i.e., Cyano (-CN) or o-nitrophenyl (o-NO2-Ph). A se...

journal_title：Journal of molecular modeling

authors： Zhang J,Kan YH,Li HB,Geng Y,Wu Y,Duan YA,Su ZM

更新日期：2013-04-01 00:00:00

abstract：:The geometric and electronic structure of tetracyanoethylene (TCNE)-aniline (donor-acceptor type) complex has been investigated in gas phase using ab initio and time dependent density functional theory calculations. Both the above calculations predict a composed structure for the complex, in which the interacting site...

journal_title：Journal of molecular modeling

authors： Manna T,Bhattacharya S

更新日期：2009-08-01 00:00:00

abstract：:Protein folding is a fundamental topic in molecular biology. Conventional experimental techniques for protein structure identification or protein folding recognition require strict laboratory requirements and heavy operating burdens, which have largely limited their applications. Alternatively, computer-aided techniqu...

journal_title：Journal of molecular modeling

authors： Li B,Lin M,Liu Q,Li Y,Zhou C

更新日期：2015-10-01 00:00:00

abstract：:1,3-Dimethylimidazolium dimethylphosphate ([C1mim][DMP]) was observed experimentally to be able to eliminate the atmospheric azeotropic point of acetone and methanol, which is an important azeotrope generally encountered in furfural production and the Fischer-Tropsch process. Here, we employed ab initio calculation to...

journal_title：Journal of molecular modeling

authors： Yu G,Liu X,Zhang X,Chen X,Liu Z,Abdeltawab AA

更新日期：2017-03-01 00:00:00

abstract：:Density functional theory (DFT) was used to investigate nickel-catalyzed ring-opening hydroacylation of methylenecyclopropanes and benzaldehydes. The results indicated that the Ni-P(n-Bu)3 complex exhibited much more excellent catalysis than the other two complexes (Ni-PMe3 and Ni-P(t-Bu)3). The hydrogen migration was...

journal_title：Journal of molecular modeling

authors： Wang F,Zhu S,Meng Q,Yin H

更新日期：2015-08-01 00:00:00

abstract：:Recently, the massively parallel computation of absolute binding free energy with a well-equilibrated system (MP-CAFEE) has been developed. The present study aimed to determine whether the MP-CAFEE method is useful for drug discovery research. In the drug discovery process, it is important for computational chemists t...

journal_title：Journal of molecular modeling

authors： Ohno K,Mitsui T,Tanida Y,Matsuura A,Fujitani H,Niimi T,Orita M

更新日期：2011-02-01 00:00:00