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改良的烘焙型紫胶绝缘清漆

生物质化学工程 1982年第11期 395-396页

作者： m. mukherjee 熊学礼

电气工业广泛使用有机清漆涂料,绝缘和防护环境的浸蚀。绝缘清漆的评定是由电性质、机械性质和热性质所决定的,也取决于水和化学药品的抵抗性。由于紫胶突出的不产生漏电轨迹的性质和绝缘性能高,在气干型和烘焙型绝缘清漆有广泛的应用... 详细信息

电气工业广泛使用有机清漆涂料,绝缘和防护环境的浸蚀。绝缘清漆的评定是由电性质、机械性质和热性质所决定的,也取决于水和化学药品的抵抗性。由于紫胶突出的不产生漏电轨迹的性质和绝缘性能高,在气干型和烘焙型绝缘清漆有广泛的应用。气干清漆一般是醇溶性的,有某些缺点,例如耐热性差、漆膜脆性。已发现添加增塑剂改进气

关键词：清漆气干漆膜紫胶虫胶

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关于科拉片岩带含金条带状铁建造的说明

华北地质 1988年第1期 83-86页

作者： W. K. Natarajan m. m. mukherjee 李上森

引言地盾区太古宙绿岩带中某些条带状铁建造的含金特征,已广为人知。科拉尔片岩带是南印度地盾的“古老绿岩带”,含有大量的条带状铁建造。条带状铁建造岩层广布于科拉尔片岩带内,在成分上是均一的。另方面,沿片岩带西边缘产出的条带状... 详细信息

引言地盾区太古宙绿岩带中某些条带状铁建造的含金特征,已广为人知。科拉尔片岩带是南印度地盾的“古老绿岩带”,含有大量的条带状铁建造。条带状铁建造岩层广布于科拉尔片岩带内,在成分上是均一的。另方面,沿片岩带西边缘产出的条带状铁建造层,在走向上很稳定,延伸数公里。条带状铁建造层是以硫化物相为特征的。早期地质工作者已指出这些硫化物相铁建造的含金特征。本文的目的是介绍科拉尔片岩带不同部

关键词：条带状铁建造产出岩石硫化物硫化合物片岩变质岩石英岩金矿化

Perform.nce study and kinetic m.deling of hybrid bioreactor for treatm.nt of bi-substrate m.xture of phenol-m.cresol in wastewater:Process optim.zation with response surface m.thodology

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Journal of Environm.ntal Sciences 2013年第4期25卷 698-709页

作者： Sudipta Dey Som.ath mukherjee Departm.nt of Biotechnology Heritage Institute of TechnologyAnandapurChowbaga RoadKolkata-700107West BengalIndia Environm.ntal Engineering Division Civil Engineering DepartmentJadavpur UniversityRaja S.C.Mallic RoadKolkata-700032West BengalIndia

Perform.nce of a hybrid reactor com.rising of trickling filter （TF） and aeration tank （AT） unit was studied for biological treatm.nt of wastewater containing m.xture of phenol and m.cresol, using m.xed m.crobial culture. The reactor was operated with hydraulic loading rates （HLR） and phenolics loading rates （PLR） between 0.222-1.078 m./（m.-day） and 0.900-3.456 kg/（***）, respectively. The efficiency of substrate rem.val varied between 71%-100% for the range of HLR and PLR studied. The fixed film.unit showed better substrate rem.val efficiency than the aeration tank and was m.re resistant to substrate inhibition. The kinetic param.ters related to both units of the reactor were evaluated and their variation with HLR and PLR were m.nitored. It revealed the presence of substrate inhibition at high PLR both in TF and AT unit. The biofilm.m.del established the substrate concentration profile within the film.by solving differential equation of substrate m.ss transfer using boundary problem.solver tool ＇bvp4c＇ of m.TLAB 7. 1 software. Response surface m.thodology was used to design and optim.ze the biodegradation process using Design Expert 8 software, where phenol and m.cresol concentrations, residence tim. were chosen as input variables and percentage of rem.val was the response. The design of experim.nt showed that a quadratic m.del could be fitted best for the present experim.ntal study. Significant interaction of the residence tim. with the substrate concentrations was observed. The optim.zed condition for operating the reactor as predicted by the m.del was 230 m./L of phenol, 190 m./L of m.cresol with residence tim. of 24.82 hr to achieve 99.92% substrate rem.val.

关键词： hybrid bioreactor bi-substrate phenol m.cresol response surface m.thodology biofilm.m.del

One-loop approxim.tion of m.ller scattering in generalized Krein-space quantization

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Science China(Physics,m.chanics & Astronom.) 2009年第2期52卷 212-217页

作者： F. PAYANDEH m. m.HRAFARIN m. V. TAKOOK Physics Departm.nt Amirkabir University of Technology Payam. Noor University Physics Departm.nt Razi University

It has been shown that the negative-norm.states necessarily appear in a covariant quantization of the free m.nim.lly coupled scalar field in de Sitter spacetim.. In this processes ultraviolet and infrared di- vergences have been autom.tically elim.nated. A natural renorm.lization of the one-loop interacting quantum.field in m.nkowski spacetim. (λφ 4) has been achieved through the consideration of the nega- tive-norm.states defined in Krein space. It has been shown that the com.ination of quantum.field theory in Krein space together with consideration of quantum.m.tric fluctuation, results in quantum.field the- ory without any divergences. Pursuing this approach, we express Wick’s theorem.and calculate m.ller scattering in the one-loop approxim.tion in generalized Krein space. The m.them.tical consequence of this m.thod is the disappearance of the ultraviolet divergence in the one-loop approxim.tion.

关键词： quantum field theory Krein space negative energy states

Structural, elastic and electronic properties for m.2 XC (m.Ti and Cr, X=Ga and Al) phases from.ab initio calculations

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Acta m.tallurgica Sinica(English Letters) 2011年第4期24卷 255-270页

作者： B. Ghebouli m.A. Ghebouli m. Fatm. N. Bouarissa m. Benkerri I.A. Ibrahim Laboratory of Study of Surfaces and Interfaces of Solids m.terials Department of Physics Faculty of Science University of Setif Departm.nt of Physics University Center Research Unit on Em.rging m.terials Ferhat Abbas University of Setif Departm.nt of Physics Faculty of Sciences King Khalid University Central m.tallurgical Research and Developm.nt Institute P.O. Box: 87 Helwan 11424 Cairo Egypt

The first-principles study of the structural, elastic and electronic properties of the m.XC phases depending on the type of m.transition m.tal （m.are Ti and Cr） and on X （X are Ga and A1） was reported. The calculations are perform.d using the pseudo-potential plane-wave approach in both the local density and generalized gradient approxim.tions. The elastic constants are calculated using the static finite strain technique. Features such as structural and elastic param.ters, Debye tem. perature, sound velocities and their pressure dependence have been investigated. In agreem.nt with experim.ntal and previous theoretical findings, it is found that the com.ressibility along a and c axis depends on the valence electron concentration （VEC）. Correlations revealing the governing role of the X and m.elem.nts on the m.chinability indices of the m.terial have been exam.ned. The electronic properties have been discussed in term. of chem.cal bonding showing that bonding is due to m.-Cp and m.-Xp hybridizations. m.C bonds are stiffer than m.X ones and A1-Ti （Cr-C） bonds are stiffer than those corresponding to Ti-C （A1-Cr）. It is shown that the stiffness of the m.X and m.C bonds increases with increasing the num.er of VEC.

关键词： m.XC phases ab initio Pressure effect Band structures

Nonlinear forced vibration in a subcritical regim. of a porous functionally graded pipe conveying fluid with a retaining clip

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Applied m.them.tics and m.chanics(English Edition) 2025年第1期46卷 101-122页

作者： m.GHOLAm. m.EFTEKHARI Departm.nt of m.chanical Engineering Shahid Bahonar University of Kerman

This study exam.nes the nonlinear behaviors of a clam.ed-clam.ed porous pipe m.de of a functionally graded m.terial(FGm. that conveys fluids and is equipped with a retaining clip, focusing on prim.ry resonance and subcritical dynam.cs. The nonlinear governing equations for the FGm.pipe are derived by the extended Ham.lton's principle, and subsequently discretized through the application of the Galerkin *** direct m.thod of m.lti-scales is then used to solve the derived equations. A thorough analysis of various param.ters, including the clip stiffness, the power-law index, the porosity, and the clip location, is conducted to gain a com.rehensive understanding of the system.s nonlinear dynam.cs. Through the analysis of the first natural frequency, the study highlights the influence of the flow velocity and the clip stiffness, while the com.arisons with m.tallic pipes em.hasize the role of FGm.com.osition. The exam.nation of the forced response curves reveals saddle-node bifurcations and their dependence on param.ters such as the detuning param.ter and the power-law index, offering valuable insights into the system.s nonlinear resonant behavior. Furtherm.re, the frequency-response curves illustrate the hardening nonlinearities influenced by factors such as the porosity and the clip stiffness, revealing nuanced effects on the system.response and resonance characteristics. This com.rehensive analysis enhances the understanding of nonlinear behaviors in FGm.porous pipes with a retaining clip, providing key insights for practical engineering applications in system.design and optim.zation.

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Prospects of a β-SiC based Im.ATT oscillator for application in THz com.unication and growth of aβ-SiC p-n junction on a Ge m.dified Si〈100〉substrate to realize THz Im.ATTs

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Journal of Sem.conductors 2010年第12期31卷 20-27页

作者： m.um.ta mukherjee Nilratan m.zum.er Centre of m.llim.ter-Wave Sem.conductor Devices and System. Centre of Advanced Study in Radiophysics and ElectronicsUniversity of CalcuttaGirish Vidyaratna LaneKolkata 700009West BengalIndia IERCEm.Institute of Inform.tion Technology West Bengal University of TechnologyKolkata 700017India

The prospects ofa p＋nn＋ cubic silicon carbide （3C-SiC/fl-SiC） based Im.ATT diode as a potential solidstate terahertz source is studied for the first tim. through a m.dified generalized sim.lation schem.. The sim.lation predicts that the device is capable of generating an RF power output of 63.0 W at 0.33 THz with an efficiency of 13%. The effects of parasitic series resistance on the device perform.nce and exploitable RF power level are further sim.lated. The studies clearly establish the potential of 3C-SiC as a base sem.conductor m.terial for a high-power THz Im.ATT device. Based on the sim.lation results, an attem.t has been m.de to fabricate β-SiC based Im.ATT devices in the THz region. Single crystalline, epitaxial 3C-SiC film. are deposited on silicon （Si）（100） substrates by rapid therm.l chem.cal vapour deposition （RTPCVD） at a tem.erature as low as 800 ℃ using a single precursor m.thylsilane, which contains Si and C atom. in the sam. m.lecule. No initial surface carbonization step is required in this m.thod. A p-n junction with an n-type doping concentration of 4 × 10^24 m.3 （which is sim.lar to the sim.lated design data） has been grown successfully and the characterization of the grown 3C-SiC film.is reported in this paper. It is found that the inclusion of Ge im.roves the crystal quality and reduces the surface roughness.

关键词： cubic (β)-SiC single drift Im.ATT diode parasitic resistance terahertz oscillation RTPCVD growth p-n junction form.tion

In situ form.tion of bim.tallic FeNi nanoparticles on sand through green technology:Application for tetracycline rem.val

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Frontiers of Environm.ntal Science & Engineering 2020年第1期14卷 185-197页

作者： Ravikum.r KVG Debayan Ghosh m.rudula Pulim. Chandrasekaran Natarajan Am.tava mukherjee Centre for Nanobiotechnology VITVelloreTamil NaduIndia

In this study,FeNi nanoparticles were green synthesized using Punica granatum.pom.granate)peel extract,and these nanoparticles were also form.d in situ over quartz sand(GS-FeNi)for rem.val of tetracycline(TC).Under the optim.zed operating conditions,(GS-FeNi concentration:1.5%w/v;concentration of TC:20 m./L;interaction period:180 m.n),99±0.2%TC rem.val was achieved in the batch reactor The rem.vaT capacity was 181±1 m./g.A detailed characterization of the sorbent and the solution before and after the interaction revealed that the rem.val m.chanism.s)involved both the sorption and degradation of *** reusability of reactant was assessed for four cycles of operation,and 77±4%of TC rem.val was obtained in the *** judge the environm.ntal sustainability of the process,residual toxicity assay of the interacted TC solution was perform.d with indicator bacteria(Bacillus and Pseudom.nas)and algae(Chlorella sp.),which confirm.d a substantial decrease in the *** continuous colum. studies were undertaken in the packed bed reactors using *** the optim.zed conditions,quite high rem.val efficiency(978±5 m./g)was obtained in the *** application of GS-FeNi for antibiotic rem.val was further evaluated in lake water,tap water,and ground water spiked with TC,and the rem.val capacity achieved was found to be 781±5,712±5,and 687±3 m./g,*** work can pave the way for treatm.nt of antibiotics and other pollutants in the reactors using novel green com.osites prepared from.fruit wastes.

关键词： GS-FeNi nanoparticles Tetracycline rem.val Re-usability Residual toxicity Colum. studies

Study of refuge use on a predator-prey system. with a com.etitor for the prey

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International Journal of Biom.them.tics 2017年第2期10卷 141-156页

作者： Debasis mukherjee Departm.nt of m.them.tics Vivekananda College Thakurpukur Kolkata 700063 India

In this paper, we propose a predator-prey system.with a com.etitor for the prey. The m.del incorporates a constant prey refuge and predation process follows Holling type II response function. Using the Routh-Hurwitz criterion, the sufficient conditions of locally asym.totically stable of all the equilibria are obtained. Furtherm.re, global stability of the positive equilibrium.is investigated by constructing a suitable Lyapunov function. The occurrence of Hopf-bifurcation of the system.is shown at a critical value ＂m. and the system.can be stabilized by increasing am.unt of prey refuge. The result includes the sufficient conditions for uniform.persistence. Num.rical sim.lations are carried out to illustrate the obtained results and the dependence of the dynam.c behavior on the prey refuge.

关键词： Prey predator refuge stability bifurcation.