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Chinese Journal of Chemical Engineering 2010年第3期18卷 425-445页

作者： k.rajagopal S.S.Jayabalakrishnan Department of Physics Government College of Engineering Tirunelveli-627007 Tamil Nadu India Department of Physics P.S.R. Engineering College Sivakasi-626 140 Tamil Nadu India

Density（ρ）and viscosity（η）are measured for glycine,DL-α-alanine DL-α-valine,and DL-α-leucine in 0.05,0.10,0.15 and 0.20 mol·L^-1aqueous metformin hydrochloride at 308.15,313.15 and 318.15 *** measured values are used to estimate some important parameters,such as partial molal volume Vφ,standard partial molal volume Vφ^0,transfer volume ΔVφ^0,hydration number nH,the second derivative of infinite dilution of partial molal volume with respect to temperature,viz., ^2 Vφ^0 /T^2,viscosity B-coefficient,variation of B with temperature,viz., dB/dT,free energy of activation per mole of solvent Δμ1^＊0 and solute Δμ2^0＊ of the amino *** parameters are interpreted in terms of solute-solute and solute-solvent interactions and structure making/breaking ability of solutes in the given *** addition,Vφ^0,0 ΔVφ^0,viscosity B-coefficient,ΔB and Δμ2 ^0＊ are split into group contributions（NH3^＋ COO ^-）and -CH2 of the amino acids using their linear correlation and their behavior is discussed.

关键词： standard partial molal volume transfer volume hydration number viscosity B-coefficient activation energy metformin hydrochloride

Performance, emission and combustion characteristics of sea lemon oil and its diesel blends in a diesel engine

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International Journal of Agricultural and Biological Engineering 2009年第3期2卷 69-75页

作者： V.S.Hariharan k.Vijayakumar Reddy k.rajagopal Department of Mechanical Engineering Lakireddy Bali Reddy College of EngineeringMylavaramKrishna Dt.Andhra PradeshIndia Department of Mechanical Engineering JNTU College of EngineeringHyderabadIndia

Experimental tests have been carried out to evaluate the performance,emission and combustion characteristics of a diesel engine using neat sea lemon oil and its blends of 25%,50%,&75%and standard diesel fuel *** common problems posed when using vegetable oil in a compression ignition engine are poor atomization,carbon deposits,ring sticking *** is because of the high viscosity and low volatility of vegetable *** blended with diesel,sea lemon oil presented lower viscosity,improved volatility,better combustion and less carbon *** was found that there was reduction in NO for neat sea lemon oil and its diesel blends along with marginal increase in smoke,HC and CO emissions compared to that of standard *** thermal efficiency was slightly lower for neat sea lemon oil and its diesel *** the combustion analysis,it was found that sea lemon oil-diesel blends performed better than neat sea lemon oil.

关键词： sea lemon oil blends performance emission and combustion characteristics

Ultrasonic Studies of 4-Aminobutyric Acid in Aqueous Salbutamol Sulphate Solutions at Different Temperatures

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Chinese Journal of Chemical Engineering 2010年第4期18卷 659-666页

作者： k.rajagopal S.S.Jayabalakrishnan Department of Physics Government College of EngineeringTirunelveli-627007 Tamil NaduIndia Department of Physics P.S.R.Engineering CollegeSivakasi-626140 Tamil NaduIndia

Ultrasonic speeds of 4-aminobutyric acid in 0.0041,0.0125 and 0.0207 mol·kg^-1 aqueous salbutamol sulphate（SBS） solutions are measured at 308.15,313.15 and 318.15 *** compressibility kS,change in isentropic compressibility△k S,relative change in isentropic compressibility（ △kS /kS^0） ,apparent molal compressibility kφ,limiting apparent molal compressibility kφ^0 ,transfer limiting apparent molal compressibility k φ^0,hydration number nH,pair and triplet interaction parameters kAS,kASS are *** above parameters are used to interpret the solute-solute and solute-solvent interactions of 4-aminobutyric acid in the aqueous salbutamol sulphate solutions.

关键词： ultrasonic speed isentropic compressibility limiting apparent molal compressibility hydration number salbutamol sulphate

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电火花线切割加工的若干特徵

电加工与模具 1981年第6期 21-29页

作者： k.rajagopal 梁春宜

前言斯达维斯基认为,电火花线切割加工得以由研究发展到实用,是因为它能以很低的脉冲能量（0.001焦耳）,加工精密的电子器件。一般情况下,加工钢或铜时,金属去除速度达35～40毫米2/分,加工硬质合金时达20毫米2/分,表面不平度（Ra）为2～... 详细信息

前言斯达维斯基认为,电火花线切割加工得以由研究发展到实用,是因为它能以很低的脉冲能量（0.001焦耳）,加工精密的电子器件。一般情况下,加工钢或铜时,金属去除速度达35～40毫米2/分,加工硬质合金时达20毫米2/分,表面不平度（Ra）为2～6.5微米:根据斯达维斯基所提供的数据,加工精度能达到0.003毫米,光洁度能达到0.4微米。

关键词：电极丝张力进给速度工作液煤油导向块极丝燃料油电火花线切割加工金属去除率

Controlling chaos and supressing chimeras in a fractional-order discrete phase-locked loop using impulse control

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Chinese Physics B 2021年第12期30卷 63-73页

作者： karthikeyan rajagopal Anitha karthikeyan Balamurali Ramakrishnan Centre for Nonlinear Systems Chennai Institute of TechnologyChennaiIndia Department of Electronics and Communication Engineering Prathyusha Engineering CollegeChennaiIndia

A fractional-order difference equation model of a third-order discrete phase-locked loop(FODPLL) is discussed and the dynamical behavior of the model is demonstrated using bifurcation plots and a basin of attraction. We show a narrow region of loop gain where the FODPLL exhibits quasi-periodic oscillations, which were not identified in the integer-order model. We propose a simple impulse control algorithm to suppress chaos and discuss the effect of the control step. A network of FODPLL oscillators is constructed and investigated for synchronization behavior. We show the existence of chimera states while transiting from an asynchronous to a synchronous state. The same impulse control method is applied to a lattice array of FODPLL, and the chimera states are then synchronized using the impulse control algorithm. We show that the lower control steps can achieve better control over the higher control steps.

关键词： discrete Josephson junction fractional order chaos impulse control chimera

Local sum uncertainty relations for angular momentum operators of bipartite permutation symmetric systems

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Chinese Physics B 2022年第6期31卷 163-169页

作者： I Reena H S karthik J Prabhu Tej Sudha A R Usha Devi A k.rajagopal Department of Physics JnanabharathiBangalore UniversityBangalore-560056India 2 International Centre for Theory of Quantum Technologies University of GdanskGdansk80-308Poland Department of Physics Ramaiah University of Applied SciencesBangalore-560054India Department of Physics Kuvempu UniversityShankaraghattaShimoga-577451India Inspire Institute Inc. AlexandriaVirginia22303USA

We show that violation of the variance based local sum uncertainty relation(LSUR)for angular momentum operators of a bipartite system,proposed by Hofmann and Takeuchi[***.A 68032103(2003)],reflects entanglement in the equal bipartitions of an N-qubit symmetric state with even *** establish the one-to-one connection with the violation of LSUR with negativity of covariance matrix[***.A 364203(2007)]of the two-qubit reduced system of a permutation symmetric N-qubit state.

关键词： sum uncertainty relations permutation symmetry rotational invariance

Molecular characterization and diversity analysis of bacterial communities associated with Dialeurolonga malleswaramensis （Hemiptera： Aleyrodidae） adults using 16S rDNA amplicon pyrosequencing and FISH

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Insect Science 2016年第5期23卷 704-711页

作者： Neeti Pandey Raman rajagopal Gut Biology Lab Room No 117 Department of Zoology University of Delhi Delhi 110007 India

Dialeurolonga malleswaramensis Sundararaj （Hemiptera： Aleyrodidae） is a phytophagous sap sucking insect. It infests Polyalthia longifolia, an important avenue tree of India, effective in alleviating noise pollution and having immense medicinal importance. Samples of this insect were collected from Polyalthia longifolia. The cytochrome c oxidase subunit I gene （mtCOl） helped in the molecular characterization of the insect. This study reports the bacterial diversity in D. malleswararnensis adults by high throughput 16S rDNA amplicon pyrosequencing. The major genera identified were Portiera and Arsenophonus. Other bacterial genera detected were uncultured alpha proteobacterium, Sphingopyxis and Methylobacterium. We also employed fluorescence in situ hybridization （FISH） in whole mount samples to confirm the presence of dominant endosymbionts Portiera and Arsenophonus to the bacteriocyte of D. malleswaramensis. This study concludes that combining techniques like 16S rDNA amplicon pyrosequencing and FISH reveal both dominant and rare bacteria. The data also predict the evolutionary position of this pest with respect to other whitefly species using a mitochondrial marker.

关键词： 16S rDNA amplicon pyrosequencing bacterial diversity Dialeurolongamalleswaramensis FISH mtC01

Role of innate immunity in the development of hepatocellular carcinoma

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World Journal of Gastroenterology 2013年第43期19卷 7500-7514页

作者： rajagopal N Aravalli Department of Radiology University of Minnesota Medical SchoolMinneapolisMN 55455United States

Hepatocellular carcinoma(HCC)is the most common form of liver cancer *** is caused by a variety of risk factors,most common ones being infection with hepatitis viruses,alcohol,and *** often develops in the background of underlying cirrhosis,and even though a number of interventional treatment methods are currently in use,recurrence is fairly common among patients who have had a ***,whole liver transplantation remains the most practical treatment option for *** to the growing incidence of HCC,intense research efforts are being made to understand cellular and molecular mechanisms of the disease so that novel therapeutic strategies can be developed to combat liver *** recent years,it has become clear that innate immunity plays a critical role in the development of a number of liver diseases,including *** particular,the activation of Toll-like receptor signaling results in the generation of immune responses that often results in the production of proinflammatory cytokines and chemokines,and could cause acute inflammation in the *** this review,the current knowledge on the role of innate immune responses in the development and progression of HCC is examined,and emerging therapeutic strategies based on molecular mechanisms of HCC are discussed.

关键词： Hepatocellular carcinoma Innate immunity Toll-like receptor Liver cancer Inflammation

Regression analysis of squeezing-induced hybrid nanofluid flow in Darcy-Forchheimer porous medium

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Applied Mathematics and Mechanics(English Edition) 2025年第1期46卷 193-208页

作者： k.MUHAMMAD M.SARFRAZ Department of Humanities and Sciences School of Electrical Engineering and Computer Science National University of Sciences and Technology Department of Mathematics Quaid-i-Azam University

This article presents a mathematical model addressing a scenario involving a hybrid nanofluid flow between two infinite parallel plates. One plate remains stationary, while the other moves downward at a squeezing velocity. The space between these plates contains a Darcy-Forchheimer porous medium. A mixture of water-based fluid with gold(Au) and silicon dioxide(Si O2) nanoparticles is formulated. In contrast to the conventional Fourier's heat flux equation, this study employs the Cattaneo-Christov heat flux equation. A uniform magnetic field is applied perpendicular to the flow direction, invoking magnetohydrodynamic(MHD) effects. Further, the model accounts for Joule heating, which is the heat generated when an electric current passes through the fluid. The problem is solved via NDSolve in MATHEMATICA. Numerical and statistical analyses are conducted to provide insights into the behavior of the nanomaterials between the parallel plates with respect to the flow, energy transport, and skin *** findings of this study have potential applications in enhancing cooling systems and optimizing thermal management strategies. It is observed that the squeezing motion generates additional pressure gradients within the fluid, which enhances the flow rate but reduces the frictional drag. Consequently, the fluid is pushed more vigorously between the plates, increasing the flow velocity. As the fluid experiences higher flow rates due to the increased squeezing effect, it spends less time in the region between the plates. The thermal relaxation, however, abruptly changes the temperature, leading to a decrease in the temperature fluctuations.

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Synthesis and electrochemical performance of (100-x)Li7P3S11-xLi2OHBr composite solid electrolyte for all-solid-state lithium batteries

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Journal of Energy Chemistry 2020年第8期29卷 307-316,I0011页

作者： Su-Yeon Jung Rajesh rajagopal kwang-Sun Ryu Department of Chemistry University of UlsanDoowang-dongNam-gu 44776UlsanSouth Korea

Li7P3S11solid electrolytes with high lithium-ion conductivity are promising candidates for use in all-solidstate lithium ***,this electrolyte’s poor interfacial compatibility with lithium electrodes causes unstable *** this study,in order to address this problem,(100-x)Li7P3S11-xLi2OHBr(x=0,2,5,10,20,30,40,and 50)electrolytes are prepared by a high energy ball-milling technique and heat-treatment *** resulting(100-x)Li7P3S11-xLi2OHBr(x=2,5,10,20,30,40,and 50)electrolytes provide improved electrochemical performance with good cycling stability and a wide electrochemical window of up to 10 V(***/Li+).Moreover,these electrolytes have high ionic conductivity of 10-4–10-5S/cm at room ***,the 90Li7P3S11-10Li2OHBr electrolyte displays the highest conductivity of 4.4×10-4S/cm at room temperature as well as improved ***,90Li7P3S11-10Li2OHBr shows decreased interfacial resistance between the solid electrolyte and cathode electrode,which was revealed by Electrochemical Impedance Spectroscopy(EIS)*** initial discharge capacity of 90Li7P3S11-10Li2OHBr was found to be 135 m Ah/g when used in a In|solid electrolyte|Li(Ni0.6Co0.2Mn0.2)O2 all-solid-state lithium battery(ASSLB).Thus,we can conclude the addition of Li2OHBr into the Li7P3S11results in enhanced electrochemical properties.

关键词： All-solid-state lithium battery Solid electrolyte Solid sulfide electrolyte Li2OHBr Antiperovskite