检索结果-南通市图书馆

Chinese Journal of Chemistry 2011年第3期29卷 504-510页

作者： velingkar, v. s. Dandekar, v. D. Department of Pharmaceutical Chemistry Prin. K. M. Kundnani College of Pharmacy Cuffe Parade Mumbai 4000005 India

A novel class of molecules with structure N-（3-arylpropyl）-9,10-dihydro-9-oxoacridine-4-carboxamides （20- 29） were designed by generating a pharmacophore for potent MDR reversal activity using phase drug design software. The designed molecules were synthesized by a novel synthesis route and evaluated for their inhibitory effects on the transport activity of P-glycoprotein （P-gp） by standard Hoechst 33342 assay method. Based on the pIC50 values of ten title compounds screened, three compounds exhibited better activity as compared to verapamil used as standard.

关键词： N-(3-arylpropyl)-9,10-dihydro-9-oxo-acridine-4-carboxamides MDR reversal agents pharmacophore,phase drug design software structure-activity relationships structure elucidation

Grain to outcrop-scale frozen moments of dynamic magma mixing in the syenite magma chamber,Yelagiri Alkaline Complex,south India

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Geoscience Frontiers 2014年第6期5卷 801-820页

作者： M.L.Renjith s.N.Charan D.v.subbarao E.v.s.s.K.Babu v.B.Rajashekhar Marine and Coastal survey Division Geological Survey of IndiaCochin 682037India Geochemistry Division CSIR-National Geophysical Research InstituteHyderabad 500007India New Zealand Petroleum and Minerals Wellington 6037New Zealand

Magma mixing process is unusual in the petrogenesis of felsic rocks associated with alkaline complex worldwide. Here we present a rare example of magma mixing in syenite from the Yelagiri Alkaline Complex, south India. Yelagiri syenite is a reversely zoned massif with shoshonitic (Na2O t K2O?5e 10 wt.%, Na2O/K2O ? 0.5e2, TiO2s character. systematic modal variation of plagioclase (An11e16 Ab82e88), K-feldspar (Or27e95 Ab5e61), diopside (En34e40Fs11e18Wo46e49), biotite, and Ca-amphibole (edenite) build up three syenite facies within it and imply the role of in-situ fractional crystallization (FC). Evidences such as (1) disequilibrium micro-textures in feldspars, (2) microgranular mafic enclaves (MME) and (3) synplutonic dykes signify mixing of shoshonitic mafic magma (MgO ? 4e 5 wt.%, siO2 ? 54e59 wt.%, K2O/Na2O ? 0.4e0.9) with syenite. Molecular-scale mixing of mafic magma resulted disequilibrium growth of feldspars in syenite. Physical entity of mafic magma preserved as MME due to high thermal-rheological contrast with syenite magma show various hybridization through chemical exchange, mechanical dilution enhanced by chaotic advection and phenocryst migration. In synplutonic dykes, disaggregation and mixing of mafic magma was confined within the conduit of injec-tion. Major-oxides mass balance test quantified that approximately 0.6 portions of mafic magma had interacted with most evolved syenite magma and generated most hybridized MME and dyke samples. It is unique that all the rock types (syenite, MME and synplutonic dykes) share similar shoshonitic and met-aluminous character;mineral chemistry, REE content, coherent geochemical variation in Harker diagram suggest that mixing of magma between similar composition. Outcrop-scale features of crystal accumu-lation and flow fabrics also significant along with MME and synplutonic dykes in syenite suggesting that Yelagiri syenite magma chamber had evolved through multiple physical processes like

关键词： Magma mixing Disequilibrium textures Petrology synplutonic dykes Geodynamics

A neutronic experiment to support the design of an Indian TBM shield module for ITER

在线全文

学校读者我要写书评

暂无评论

Plasma science and Technology 2019年第6期21卷 147-152页

作者： H L sWAMI M ABHANGI sanchit sHARMA s TIWARI A N MIsTRY v vAsAvA v MEHTA s vALA C DANANI v CHAUDHARI P CHAUDHURI Institute for Plasma Research Gandhinagar Gujarat 382428 India Homi Bhabha National Institute(HBNI) Anushaktinagar Mumbai 400094 India Pandit Deendayal Petroleum University Gandhinagar Gujarat 382007 India

A shield module is associated with an Indian Test Blanket Module (TBM) in ITER to limit the radiation doses in port inter-space *** shield module is made of stainless steel plates and water *** is identified as an important component for radiation protection because of its radiation exposure control *** radiation protection classification leads to more assurance of the component *** order to validate and verify the design of the shield module,a neutronic laboratory-scale experiment is designed and *** experiment is planned by considering the irradiation under a neutron source of 14 Mev and yields of 1010 n *** reference neutron spectrum of the ITER TBM shield module has been achieved through optimization of the neutron source spectrum by a combination of steel and lead *** neutron spectrum and flux are measured using a multiple foil activation technique and neutron dose-rate meter LB 6411 (He-3 proton recoil counter with polyethylene),*** neutronic design simulation is assessed using MCNP5 and FENDL 2.1 crosssection *** paper covers neutronic design,irradiation and the outcome of the experiment in detail.

关键词： TBM shield module neutronic experiment ITER MCNP neutron attenuation

DeNOx study in Diesel Engine Exhaust Using Barrier Discharge Corona Assisted by v_2O_5/TiO_2 Catalyst

在线全文

学校读者我要写书评

暂无评论

Plasma science and Technology 2004年第4期6卷 2411-2415页

作者： B.s.Rajanikanth v.Ravi Indian Institute of science Bangalore 560012IndiaIndian Institute of ScienceBangalore 560012India

A plasma-assisted catalytic reactor was used to remove nitrogen oxides (NOx)from diesel engine exhaust operated under different load conditions. Initial studies were focused onplasma reactor (a dielectric barrier discharge reactor) treatment of diesel exhaust at varioustemperatures. The nitric oxide (NO) removal efficiency was lowered when high temperature exhaust wastreated using plasma reactor. Also, NO removal efficiency decreased when 45% load exhaust wastreated. studies were then made with plasma reactor combined with a catalytic reactor consisting ofa selective catalytic reduction (sCR) catalyst, v_2O_5/TiO_2. Ammonia was used as a reducing agentfor sCR process in a ratio of 1:1 to NOx. The studies were focused on temperatures of the sCRcatalytic reactor below 200℃. The plasma-assisted catalytic reactor was operated well to remove NOxunder no-load and load conditions. For an energy input of 96 J/l, the NOx removal efficienciesobtained under no-load and load conditions were 90% and 72% respectively at an exhaust temperatureof 100 ℃.

关键词： non-thermal plasma DeNOx barrier discharge diesel exhaust

Influence of Morse Potential on DNA Dynamics

在线全文

学校读者我要写书评

暂无评论

Chinese Physics Letters 2006年第1期23卷 65-68页

作者： ZDRAvKOvIC s sATARIC M. v. Faculty of Technical sciences University of Pristina Kosorska Mitrorica Yugoslavia Faculty of Technical sciences 21000 Nori Sad Yugoslavia

Based on the Peyrard-Bishop-Dauxois （i.e. the extended Peyrard-Bishop） model of DNA dynamics, the transversal hydrogen interaction is modelled by Morse potential and the impact of the Morse parameters on the DNA dynamics is investigated. In particular, we show how modulation of the signal, moving through the DNA chain, depends on those parameters. It is also shown that the DNA dynamics represents the interplay between dispersion and nonlinearity. Finally, we discuss the values of coupling constants κ and K.

关键词： NONLINEAR HELICOIDAL MODEL vIsCOsITY BREATHER IMPACT

Effect of TiO_(2) nanoparticles on the photocatalytic properties of PEO coatings on Mg alloy

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Magnesium and Alloys 2023年第2期11卷 735-752页

作者： D.v.Mashtalyar I.M.Imshinetskiy K.v.Nadaraia A.s.Gnedenkov s.N.suchkov D.P.Opra E.v.Pustovalov A.Yu Ustinov s.L.sinebryukhov s.v.Gnedenkov Institute of Chemistry Far Eastern BranchRussian Academy of SciencesVladivostok690022Russia Far Eastern Federal University Vladivostok690950Russia

A comprehensive study of the properties of coatings formed on a magnesium alloy by plasma electrolytic oxidation(PEO) using the electrolytes with nanosized particles of anatase(titanium dioxide) has been carried out. Formed coatings reduce corrosion current density 2.5-fold and increase hardness by 25% compared to a coating without particles. Confocal micro-Raman spectroscopy revealed the presence of anatase and rutile phases in the composition of PEO coating due to the incorporation of TiO2nanoparticles during plasma electrolytic treatment. The presence of titanium dioxide had a positive effect on the photocatalytic properties of coatings: the constant rate of the methyl orange and methyl blue decomposition is increased in 1.6 and 1.8-fold, respectively, compared to the coating formed in electrolyte without TiO_(2) particles.

关键词： Plasma electrolytic oxidation Nanoparticles Titanium dioxide Photocatalysis Protective coatings

structure and Properties of Nanostructured vacuum-Deposited Foils of Invar Fe–(35–38 wt%)Ni Alloys

在线全文

学校读者我要写书评

暂无评论

Journal of Materials science & Technology 2015年第11期31卷 1079-1086页

作者： v.M.Nadutov A.I.Ustinov s.A.Demchenkov Ye.O.svystunov v.s.skorodzievski G.v.Kurdyumov Institute for Metal Physics of National Academy of sciences of Ukraine E.O.Paton Electric Welding Institute of National Academy of sciences of Ukraine

The process of electron beam vacuum deposition of the Fe-（35-38 wt%）Ni alloys at substrate temperatures Ts from 300 to700 ℃ were used to produce vacuum-deposited foils with the FCC structure, differing by the size of characteristic microstructural elements （grains and subgrains）. It was shown that refinement of foil microstructural elements to nanoscale is accompanied by their microhardness increase up to 4-5 GPa. The change of the thermal expansion coefficient （TEC） of the nanostructured （Ns） foil of the Fe-35.1Ni alloy within the temperature range from -50 to 150 ℃ has some deviation from that observed for cast Invar alloy of the same composition. It has been found that the main factors affecting the peculiarities of thermal expansion of the Ns foil can be related to the presence of small fraction of BCC- phase in them, high level of crystalline lattice microstrains and inhomogeneous magnetic order in FCC- phase. It was shown that as a result of additional thermal treatment of Ns foils their invar properties become similar to that observed for cast Invar alloy but mechanical properties remain on the same level.

关键词： Fe-Ni alloys Electron beam physical vapor deposition (EBPvD) Nanostructured materials Hardness Thermal expansion Mossbauer spectroscopy

Interacting tachyonic scalar field

在线全文

学校读者我要写书评

暂无评论

Communications in Theoretical Physics 2021年第2期73卷 102-107页

作者： A Kundu s D Pathak v K Ojha Department of Physies Lovely Professional UniversityPhagwaraPunjab144411India school of sciences SAGE University BhopalMadhya Pradesh462022India

We discuss the coupling between dark energy and matter by considering a homogeneous tachyonic scalar field as a candidate for dark *** obtained the functional form of scale factor by assuming that the coupling strength depends linearly on the Hubble parameter and energy *** also estimated the cosmic age of the Universe for different values of coupling constant.

关键词： dark energy dark matter scalar field achyonic scalar field

Optical Emission spectroscopic study During the Evaporation of Aluminium in the Thermal Plasma Reactor

在线全文

学校读者我要写书评

暂无评论

Plasma science and Technology 2010年第1期12卷 27-30页

作者： I.BANERJEE N.v.KULKARNI s.KARMAKER v.L.MATHE s.v.BHORAsKAR A.K.DAs Applied Physics Department Birla Institute of Technology Department of Physics University of Pune Department Bhabha Atomic Research Center

The oxidation of aluminium was studied using optical emission spectroscopy （OEs） during the evaporation of aluminium in traces of oxygen in a thermal plasma reactor. The ratio of the measured line intensities of Al-O with that of Al follows the exact trend as of that obtained from the corresponding line intensities in X-ray diffraction spectra of the synthesized samples. In this paper the inherent capacity of emission spectroscopy in evaluating the growth processes under plasma induced reactions is presented.

关键词： thermal plasma reactor aluminium oxidation optical emission spectroscopy,X-ray diffraction

Interatomic Interaction Models for Magnetic Materials:Recent Advances

在线全文

学校读者我要写书评

暂无评论

Chinese Physics Letters 2024年第6期41卷 54-66页

作者： Tatiana s.Kostiuchenko Alexander v.shapeev Ivan s.Novikov Emanuel Institute of Biochemical Physics RAs 4 Kosygin StreetMoscow119334Russian Federation Independent investigator

Atomistic modeling is a widely employed theoretical method of computational materials *** has found particular utility in the study of magnetic ***,magnetic empirical interatomic potentials or spinpolarized density functional theory(DFT)served as the primary models for describing interatomic interactions in atomistic simulations of magnetic ***,in recent years,a new class of interatomic potentials known as magnetic machine-learning interatomic potentials(magnetic MLIPs)has *** MLIPs combine the computational efficiency,in terms of CPU time,of empirical potentials with the accuracy of DFT *** this review,our focus lies on providing a comprehensive summary of the interatomic interaction models developed specifically for investigating magnetic *** also delve into the various problem classes to which these models can be ***,we offer insights into the future prospects of interatomic interaction model development for the exploration of magnetic materials.

关键词： materials interaction empirical