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Nano zinc, an alternative to conventional zinc as animal feed supplement:A review

Animal Nutrition 2016年第3期2卷 134-141页

作者： Partha S.Swain Somu B.N.Rao Duraisamy rajendran George Dominic Sellappan Selvaraju ICAR National Dairy Research Institute ICAR-National Dairy Research Institute National Institute of Animal Nutrition and Physiology

The uniqueness of Zn is that, it is the second most abundant trace element in the animal body but can't be stored in the body, thus regular dietary intake is required. Zinc oxide(ZnO) nanoparticles(NP) particles are being extensively used in paints, skin lotions pigments, food, electronics appliances, biological and pharmaceutical applications and many more. Zinc oxide nanoparticles are the specially prepared mineral salt having particle size of 1 to 100 nm. It promotes growth can act as antibacterial agent,modulates the immunity and reproduction of the animals. Both in lower and higher doses of specifications it has exhibited a variety of effects on animal performances. Apart from being highly bioavailable, reports have already pointed out the growth promoting, antibacterial, immuno-modulatory and many more effects of nano zinc(nZn). These can be used at lower doses and can provide better result than the conventional Zn sources and indirectly prevents environmental contamination also. The toxicological studies provide mixed results in animal models. Studies been undertaken in diversified animal species and encouraging effects have been reported with nZn supplementation. However, there is a need to optimize the dose and duration of ZnO NP supplementation for human and livestock,depending on its biological effects. Actual bioavailability of ZnO NP in livestock is still to be worked *** this review we have attempted to summarize, conclude the beneficial effects of nZnO and its possible usage as mineral supplement to different categories of human and livestock.

关键词： Antibacterial agent Feed additive Human Livestock Nano zinc

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Approximate Analytical Expressions for the Concentrations of Acetate and Methane in the Microbial Electrochemical Cell

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Natural Science 2016年第4期8卷 196-210页

作者： Sivasamy Pavithra Lakshmanan rajendran Raghavan Ashokan Department of Mathematics Sethu Institute of Technology Kariapatti India Department of Mathematics Madurai Kamaraj University Madurai India

Mathematical modeling of microbial electrochemical cells (MXCs) for both microbial fuel cell and microbial electrolysis cell is discussed. The model is based on the system of reaction diffusion of reaction-diffusion equation containing a non-linear term related to substrate consumption rates by electrogeneic and methanogenic microorganism in the bioflim. This paper presents the approximate analytical method to solve the non-linear differential equation that describes the diffusion coupled with acetate (substrate) consumption rates. Simple analytical expressions for the concentrations of acetate and methane have been derived for all experimental values of bulk concentration, distributions of microbial volume fraction, local potential in the biofilm and biofilm thickness. In addition, sensitivity of the parameters on concentrations is also discussed. Our analytical results are also validated with the numerical results and limiting cases results. Further, a graphical procedure for estimating the kinetic parameters is also suggested.

关键词： Mathematical Modeling Microbial Fuel and Electrolysis Cells Waste Water Treatment Boundary Value Problems Non Linear Equations

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Analytical Expressions of Concentrations inside the Cationic Glucose-Sensitive Membrane

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Applied Mathematics 2012年第4期3卷 373-381页

作者： Swaminathan Sevukaperumal Shunmugham Loghambal Lakshmanan rajendran Department of Mathematics The Madura College Madurai India

A mathematical model of Wu et al. [J. Membr. Sci 254 (2005) 119-127] of a cationic glucose-sensitive membrane is discussed. The model involves the system of non-linear steady-state reaction-diffusion equations. Analytical expres-sions pertaining to concentration of oxygen, glucose, and gluconic acid for all values of parameters are presented. We have employed Homotopy analysis method to evaluate the approximate analytical solutions of the non-linear boundary value problem. A comparison of the analytical approximation and numerical simulation is also presented. A good agreement between theoretical predictions and numerical results is observed.

关键词： Homotopy Analysis Method Cationic Glucose-Sensitive Membrane Non-Linear Reaction/Diffusion Equations

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Analysis of non-linear reaction-diffusion processes with Michaelis-Menten kinetics by a new Homotopy perturbation method

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Natural Science 2013年第9期5卷 1034-1046页

作者： Devaraj Shanthi Vembu Ananthaswamy Lakshmanan rajendran Department of Mathematics The Madura College Madurai India Government Higher Secondary School Madurai India

This paper demonstrates the approximate analytical solution to a non-linear singular two-point boundary-value problem which describes oxygen diffusion in a planar cell. The model is based on diffusion equation containing a non-linear term related to Michaelis-Menten kinetics of enzymatic reaction. Approximate analytical expression of concentration of oxygen is derived using new Homotopy perturbation method for various boundary conditions. The validity of the obtained solutions is verified by the numerical results.

关键词： Oxygen Diffusion Michaelis-Menten Non-Linear Differential Equations New Homotopy Perturbation Method Numerical Simulation

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Application of extracellular vesicles from mesenchymal stem cells promotes hair growth by regulating human dermal cells and follicles

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World Journal of Stem Cells 2022年第7期14卷 527-538页

作者： Ramya Lakshmi rajendran Prakash Gangadaran Mi Hee Kwack Ji Min Oh Chae Moon Hong Young KwanSung Jaetae Lee Byeong-Cheol Ahn Department of Nuclear Medicine School of MedicineKyungpook National UniversityDaegu 41944South Korea BK21 FOUR KNU Convergence Educational Program of Biomedical Sciences for Creative Future Talents Department of Biomedical SciencesSchool of MedicineKyungpook National UniversityDaegu 41944South Korea Department of Immunology School of MedicineKyungpook National UniversityDaegu 41944South Korea Department of Nuclear Medicine Kyungpook National University HospitalDaegu 41944South Korea

BACKGROUND Dermal papillae(DP)and outer root sheath(ORS)cells play important roles in hair growth and regeneration by regulating the activity of hair follicle(HF)*** To investigate the effects of human mesenchymal stem cell-derived extracellular vesicles(hMSC-EVs)on DP and ORS cells as well as *** are known to regulate various cellular ***,the effects of hMSC-EVs on hair growth,particularly on human-derived HF cells(DP and ORS cells),and the possible mechanisms underlying these effects are *** hMSC-EVs were isolated and characterized using transmission electron microscopy,nanoparticle tracking analysis,western blotting,and flow *** activation of DP and ORS cells was analyzed using cellular proliferation,migration,western blotting,and real-time polymerase chain *** growth was evaluated ex vivo using human *** Wnt3a is present in a class of hMSC-EVs and associated with the EV ***-EVs promote the proliferation of DP and ORS ***,they translocateβ-catenin into the nucleus of DP cells by increasing the expression ofβ-catenin target transcription factors(Axin2,EP2 and LEF1)in DP *** with hMSC-EVs also promoted the migration of ORS cells and enhanced the expression of keratin(K)differentiation markers(K6,K16,K17,and K75)in ORS ***,treatment with hMSC-EVs increases hair shaft elongation in cultured human *** These findings suggest that hMSC-EVs are potential candidates for further preclinical and clinical studies on hair loss treatment.

关键词： Mesenchymal stem cells Extracellular vesicles Hair growth Dermal papillae Outer root sheath cells

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Solution of non-linear boundary value problems in immobilized glucoamylase kinetics

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Natural Science 2013年第4期5卷 478-494页

作者： Swaminathan Sevukaperumal Alagu Eswari Lakshmanan rajendran Department of Mathematics Ganesar College of Arts and Science Melaisivapuri India Department of Mathematics K. L. N. College of Engineering Pottapalayam India Department of Mathematics The Madura College Madurai India

A mathematical model to describe the enzyme reaction, mass transfer and heat effects in the calorimetric system is discussed. The model is based on non-stationary diffusion Equation containing a nonlinear term related to immobilize liver esterase by flow calorimetry. This paper presents the complex numerical methods (Adomian decomposition method, Homotopy analysis and perturbation method) to solve the non-linear differential Equations that depict the diffusion coupled with a non-linear reaction terms. Approximate analytical expressions for substrate concentration have been derived for all values of parameters α, β and γE. These analytical results are compared with the available numerical results and are found to be in good agreement.

关键词： Reaction-Diffusion System Immobilized Enzyme Adomian Decomposition Method Homotopy Analysis Method Boundary Value Problems

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Emergency Gesture Communication by Patients, Elderly and Differently Abled with Care Takers Using Wearable Data Gloves

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Journal of Signal and Information Processing 2013年第1期4卷 1-9页

作者： Kalvina rajendran Andrews Samraj Maheswari Rajavel Department of Information Technology Mahendra Engineering College Namakkal India School of Computing Science and Engineering Vellore Institute of Technology University Vellore India

The Healthcare monitoring on a clinical base involves many implicit communication between the patient and the care takers. Any misinterpretation leads to adverse effects. A simple wearable system can precisely interpret the implicit communication to the care takers or to an automated support device. Simple and obvious hand movements can be used for the above purpose. The proposed system suggests a novel methodology simpler than the existing sign language interpretations for such implicit communication. The experimental results show a well-distinguished realization of different hand movement activities using a wearable sensor medium and the interpretation results always show significant thresholds.

关键词： Wearable Computing Bio-Signal Processing Robotic Interface Affective-Gesture Computing

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Theoretical Analysis of Mass Transfer with Chemical Reaction Using Absorption of Carbon Dioxide into Phenyl Glycidyl Ether Solution

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Applied Mathematics 2012年第10期3卷 1179-1186页

作者： Muthukaruppan Subramaniam Indira Krishnaperumal rajendran Lakshmanan Department of Mathematics The Madura College Madurai-625011 Tamil Nadu India District Institute of Education and Training Pudukkottai Tamil Nadu India

Theoretical analysis corresponding to the diffusion and reaction kinetics in a chemical reaction between carbon dioxide and phenyl glycidyl ether solution is presented. Analytical expressions pertaining to the concentration of carbon dioxide (CO2), phenyl glycidyl ether solution (PGE) and flux are obtained in terms of reaction rate constants. In this paper, a powerful analytical method, called the Adomian decomposition method (ADM) is used to obtain approximate analytical solutions for nonlinear differential equations. Furthermore, in this work the numerical simulation of the problem is also reported using Scilab/Matlab program. An agreement between analytical and numerical results is noted.

关键词： Carbon Dioxide Phenyl Glycidyl Ether Solution Nonlinear Differential Equations Adomian Decomposition Method Boundary Value Problems

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Approximate analytical solution of non-linear reaction diffusion equation in fluidized bed biofilm reactor

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Natural Science 2012年第12期4卷 983-991页

作者： Seetharaman Usha Shanmugarajan Anitha Lakshmanan rajendran Department of Mathematics The Madura College Madurai India Department of Mathematics The Madura College Madurai India

A mathematical model for the fluidized bed biofilm reactor (FBBR) is discussed. An approximate analytical solution of concentration of phenol is obtained using modified Adomian decomposition method (MADM). The main objective is to propose an analytical method of solution, which do not require small parameters and avoid linearization and physically unrealistic assumptions. Theoretical results obtained can be used to predict the biofilm density of a single bioparticle. Satisfactory agreement is obtained in the comparison of approximate analytical solution and numerical simulation.

关键词： Fluidized Bed Biofilm Reactor Non-Linear Reaction Diffusion Equation Phenol Effectiveness Factor Modified Adomian Decomposition Method

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Analytical solution of the concentration and current in the electoenzymatic processes involved in a PPO-rotating-disk-bioelectrode

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Natural Science 2011年第1期3卷 1-8页

作者： Govindhan. Varadharajan Lakshmanan. rajendran 不详

A mathematical model for electroenzymatic process of a rotating-disk-bioelectrode in which polyphenol oxidase occurs for all values of concentration of catechol substrate is presented. The model is based on system of reaction-diffusion equations containing a non-linear term related to Michaelis-Menten kinetics of the enzymatic reaction. Approximate analytical method (He’s Homotopy perturbation method) is used to solve the non-linear differential equations that describe the diffusion coupled with a Michaelis-Menten kinetics law. Closed analytical expressions for substrate concentration, product concentration and corresponding current response have been derived for all values of parameter using perturbation method. These results are compared with simulation results and are found to be in good agreement. The obtained results are valid for the whole solution domain.

关键词： Mathematical Model Polyphenol Oxidase Steady-State Homotopy Perturbation Method Simulation

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