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Mechanical Property and Morphological Analysis of Polyester Composites Reinforced with Cyperuspangorei Fibers

Journal of Bionic Engineering 2019年第1期16卷 164-174页

作者： mayandi kalimuthu Rajini Nagarajan Alavudeen Azeez Batcha Suchart Siengchin Varada Rajulu Anumakonda Nadir Ayrilmis Department of Mechanical Engineering Kalasalingam UniversityAnand NagarKrishnankoil-626126Tamil NaduIndia Department of Mechanical and Process Engineering The Sirindhorn International Thai-German Graduate School of Engineering(TGGS)King Mongkut's University of Technology North BangkokBangkok 10800Thailand Center for Composite Materials International Research CenterKalasalingam UniversityAnand NagarKrishnankoil-626126Tamil NaduIndia Department of Wood Mechanics and Technology Faculty of ForestryIstanbul University-CerrahpasaBaheekoySariyer 34473IstanbulTurkey

In the present work,polyester composites reinforced with a newly identified Cyperus pangorei fiber(CPF)were developed by compression moulding *** effects of varying fiber content and fiber length on the mechanical properties of the Cyperus pangorei fiber reinforced polyester composites(CPFCs)such as tensile,flexural,and impact properties were *** strength of the CPFCs increased with fiber length up to 40 mm beyond which a reverse trend was *** on the test results,it was concluded that the critical fiber length and the optimum fiber weight percentage were 40 mm and 40 wt%*** maximum increase of 164%and 117%were found for the tensile and flexural strength of the composite with 40 mm fiber length and 40 wt%fiber content,*** the other hand,a 64%increase in impact strength was noticed for the optimum *** increasing contact surface between the fiber and the polyester matrix in optimum condition can restrict the probability of fiber pullout and in turn can make the composite carry more *** chemical structure of CPF was also analyzed using Fourier-Transform Infrared Spectroscopy(FTIR)*** morphological analysis of fractured samples was performed using Scanning Electron Microscopy(SEM)to understand the interfacial bonding between CPFs and polyester *** optimal composite can be a suitable alternative in the field of structural applications in construction and automobile industries.

关键词： Cyperuspangorei fiber compression molding mechanical properties polyester composites

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Characterization of Novel Lignocellulosic Spinifex littoreus Fibers and Their Composites

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Journal of Bionic Engineering 2020年第2期17卷 393-404页

作者： Milan Soosai Christopher Thankian Winowlin Jappes Jebas Thangiah Rajini Nagarajan mayandi kalimuthu Sikiru Oluwarotimi Ismail Faruq Mohammad Department of Mechanical Engineering Cape Institute of TechnologyLevengipuramTirunelveli 627114Tamil NaduIndia Department of Mechatronics Engineering Kamaraj College of Engineering&Technology VellakulamMadurai dist-622701Tamil NaduIndia Centre for Composite Materials Department of Mechanical EngineeringKalasalingam UniversityKrishnankoilVirudhunagar 626126Tamil NaduIndia Centre for Engineering Research Department of EngineeringSchool of Engineering and Computer ScienceUniversity of HertfordshireHatfieldHertfordshire AL109ABUK Surfactants Research Chair Department of ChemistryCollege of ScienceKing Saud UniversityRiyadh 11451Kingdom of Saudi Arabia

This innovative work presents mechanical,physical and chemical characterization and analysis of newly extracted fiber from naturally resourced plant stem,named Spinifex littoreus fibers(SLF).This is a novel natural,biodegradable and sustainable reinforcement for an improved ***,the chemical constituents of SLF,such as cellulose,lignin,moisture and wax content were *** raw SLF surfaces were modified by chemical treatment with sodium hydroxide(NaOH),calcium hydroxide(Ca(OH)2)and silane.A polyester matrix was reinforced with all the treated SLF,before the mechanical properties(tensile strengths)of the composites were *** all the surface chemically treated SLF/polyester composite samples,the Ca(OH)2 treated sample exhibited the highest tensile *** microscopic examination was carried out to validate this ***,this analysis established the mechanism of failure of the tensile fractured composite samples,using Scanning Electron Microscope(SEM),among other techniques.

关键词： cellulosic fiber Spinifex littoreus fibers XRD FTIR SEM tensile strength

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From traditional serrated adenoma to tubulovillous adenoma and beyond

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World Journal of Gastrointestinal Oncology 2016年第12期8卷 805-809页

作者： Sangeetha N kalimuthu Adeline Chelliah Runjan Chetty Department of Pathology Laboratory Medicine ProgramUniversity Health Network and University of Toronto

It is well established that colorectal cancer develops from a series of precursor epithelial polyps, including tubular adenomas, villous/tubulovillous adenomas (VA/TVA), sessile serrated adenomas (SSA) and traditional serrated adenomas (TSA). Of these, TSAs are least common and account for only 5% of all serrated polyps. TSAs are characterised by the presence of a “pinecone-like” architecture, granular eosinophilic cytoplasm, luminal serrations, ectopic crypt foci (ECF) and elongated, pencillate nuclei. However, the distinct slit-like luminal serrations, reminiscent of small bowel mucosa, appear to be the most unique and reproducible feature to distinguish TSAs from other polyps. There is a contention that TSAs are not inherently dysplastic and that the majority do not show cytological atypia. Two types of dysplasia are associated with TSA. Serrated dysplasia is less well recognised and less commonly encountered than adenomatous dysplasia. In addition, it is now becoming increasingly evident that TSAs can be admixed with HP, SSA and VA/TVA. At a genetic level, polyps may switch phenotype as they accumulate genetic changes, evolving from a serrated pathway to a more conventional one, which could be the basis for a spectrum theory starting out with a TSA with serration and ECF evolving into a TSA with conventional dysplasia and, eventually, to a well-developed conventional adenoma. Nevertheless, there is an exigency for future studies to provide further illumination and bridge the gaps in our present understanding.

关键词： Serrated polyps Traditional serrated adenoma Tubullovilous adenoma Serrated pathway Fusion pathways

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Paddy Leaf Disease Detection Using an Optimized Deep Neural Network

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Computers, Materials & Continua 2021年第7期68卷 1117-1128页

作者： Shankaranarayanan Nalini Nagappan Krishnaraj Thangaiyan Jayasankar kalimuthu Vinothkumar Antony Sagai Francis Britto Kamalraj Subramaniam Chokkaligam Bharatiraja Department of Computer Science&Engineering University College of EngineeringBIT CampusAnna UniversityTiruchirappalli620024India School of Computing SRM Institute of Science and TechnologyKattankulathur603203India Department of Electronics and Communication Engineering University College of EngineeringBIT CampusAnna UniversityTiruchirappalli620024India Department of Electronics&Communication Engineering SSM Institute of Engineering and TechnologyDindigul624002India Department of Mechanical Engineering Rohini College of Engineering and TechnologyPalkulam629401India Department of ECE Karpagam Academy of Higher EducationCoimbatore641021India Department of Electrical and Electronics Engineering SRM Institute of Science and TechnologyChennai603203India

Precision Agriculture is a concept of farm management which makes use of IoT and networking concepts to improve the *** diseases are one of the underlying causes in the decrease in the number of quantity and quality of the farming *** of diseases from the plant images is an active research topic which makes use of machine learning(ML)approaches.A novel deep neural network(DNN)classification model is proposed for the identification of paddy leaf disease using plant image *** errors were minimized by optimizing weights and biases in the DNN model using a crow search algorithm(CSA)during both the standard pre-training and fine-tuning *** DNN-CSA architecture enables the use of simplistic statistical learning techniques with a decreased computational workload,ensuring high classification *** leaf images were first preprocessed,and the areas indicative of disease were initially extracted using a k-means clustering *** was then applied to eliminate regions not indicative of ***,a set of features were extracted from the previously isolated diseased ***,the classification accuracy and efficiency of the proposed DNN-CSA model were verified experimentally and shown to be superior to a support vector machine with multiple cross-fold validations.

关键词： Leaf classification paddy leaf deep learning metaheuristics optimization crow search algorithm

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Bulk Growth and Characterization of D-(–)-Alanine Single Crystals

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Journal of Crystallization Process and Technology 2013年第4期3卷 130-135页

作者： kalimuthu Moovendaran Subramanian Natarajan School of Physics Madurai Kamaraj University Madurai India.

Single crystal of D-(–)-alanine (DALA), a non-linear optical material from the amino acid family was grown using a home-made crystal growth setup. The crystals of DALA were also grown by slow evaporation solution technique (SEST). The grown crystals were characterized by using single crystal X-ray diffraction, high resolution X-ray diffraction (HRXRD) and UV-vis-NIR and CD spectroscopy. Measurements of Vicker’s microhardness, laser damage threshold (LDT) value and second harmonic generation (SHG) efficiency are also reported. Thermal and dielectric studies were also carried out.

关键词： D-(–)-Alanine NLO Material MKN Setup HRXRD CD SHG

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Synthesis of silver nanoparticles using leaves of Catharanthus roseus *** and their antiplasmodial activities

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Asian Pacific Journal of Tropical Biomedicine 2012年第7期2卷 574-580页

作者： Ponarulselvam S Panneerselvam C Murugan K Aarthi N kalimuthu K Thangamani S Department of Zoology School of Life SciencesBharathiar University DRDO-BU Center for Life Sciences Division of EntomologyBharathiar University

Objective:To develop a novel approach for the green synthesis of silver nanoparticles using aqueous leaves extracts of Catharanthus roseus(***) *** which has been proven aclive against malaria parasite Plasmodium falciparum(***).Methods:Characterizations were determined by using ultraviolet-visible(UV-Vis) spectrophotometry,scanning electron microscopy(SEM).energy dispersive X-ray and X-ray ***:SLM showed the formation of silver nanoparticles with an average size of 35-55 nm.X-ray diffraction analysts showed that the particles were crystalline in nature with face centred cubic structure of the hulk silver with the broad peaks at 32.***.46.4 and ***:It can be concluded that the leaves of *** can he good source for synthesis of silver nanoparticle which shows aiitiplasmodial activity against *** important outcome of the study will he the development of value added products from medicinal plants *** lor hionicdical and nanotechnology based industries.

关键词： Silver nanoparticles Catharanthus roseus Plasmodium falciparum Antiplasmodial activity

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Larvicidal efficacy of Catharanthus roseus Linn.(Family:Apocynaceae)leaf extract and bacterial insecticide Bacillus thuringiensis against Anopheles stephensi Liston.

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Asian Pacific Journal of Tropical Medicine 2013年第11期6卷 847-853页

作者： Chellasamy Panneerselvam Kadarkarai Murugan kalimuthu Kovendan Palanisamy Mahesh Kumar Sekar Ponarulselvam Duraisamy Amerasan Jayapal Subramaniam Jiang-Shiou Hwang DRDO-BU Center for Life Sciences Bharathiar UniversityCoimhatore 641046Tamil NaduIndia Division of Entomology Department of ZoologySchool of Life SciencesBharathiar UniversityCoimbatore 641046Tamil NaduIndia Institute of Marine Biology National Taiwan Ocean UniversityKeelung 202-24Taiwan

Objective:To explore the larvicidal activity of Catharanthus roseus(***) leaf extract and Raeillus thuringiensis(***) against the malarial vector Anopheles stephensi(An. stephensi),when being used alone or ***:The larvicidal activity was assayed at various concentrations under the laboratory and field *** LC_(50) and LC_(90) values of the *** leaf extract were determined by probit ***:The plant extract showed larvicidal effects after 24 h of exposure;however,the highest larval mortality was found in the petroleum ether extract of *** against the first to fourth instars larvae with LC_(50)=3.34,4.48, 5.90 and 8.17 g/L,respectively;*** against the first to fourth instars larvae with LC_(50)=1.***.1.93.2.17 and 2.42 g/***:and the combined treatment with LC_(50)=2.***.2.41. 2.76 and 3.22 g/L,*** mortality was observed in the ***:The petroleum ether extract of *** extract and *** have potential to be used as ideal eco-friendly agents for the control of *** in vector control *** combined treatment with this plant crude extract and bacterial toxin has better larvicidal efficacy against ***.

关键词： Catharanthus roseus Bacillus thuringiensis Anopheles stephensi Larvicidal activity

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Pixel Based Steganography for Secure Information Hiding

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Journal of Information Hiding and Privacy Protection 2021年第3期3卷 143-149页

作者： N.Shyla K.kalimuthu SRMIST KattankulathurChennai

The term“steganography”is derived from the Greek words steganos,which means“verified,concealed,or guaranteed”,and graphein,which means“writing”.The primary motivation for considering steganography is to prevent unapproved individuals from obtaining disguised *** the ultimate goal of comprehending the fundamental inspiration driving the steganography procedures,there should be no significant change in the example *** Least Significant Bit(LSB)system,which is one of the methodologies for concealing propelled picture data,is examined in this *** this evaluation,another procedure for data stowing indefinitely is proposed with the ultimate goal of limiting the progressions occurring in the spread record while hiding the data with the LSB technique and making the best cover to make it difficult to get concealed *** RGB(Red,Green,and Blue)pixel esteem based stegnography technique is proposed in this *** claim to fame of this calculation is that,unlike other stegnography calculations,we do not change the pixels unless absolutely necessary.

关键词： LSB RGB pixel based steganography

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Reinvestigation of the Crystal Growth of “L-Proline Succinate” and “L-Threonine Zinc Acetate” Showing Use of Infrared Spectra for Product Identification

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Journal of Crystallization Process and Technology 2014年第2期4卷 121-125页

作者： Subramanian Natarajan Bikshandarkoil R. Srinivasan kalimuthu Moovendaran Department of Chemistry Goa University Goa India School of Physics Madurai Kamaraj University Madurai India

Reinvestigation of the growth of L-proline succinate (1) (Paramasivam and Ramachandra Raja, Journal of Crystallization Process and Technology, 2 (2012) 21 - 24;Balamurugaraj et al., Journal of Material Physics and Chemistry 1 (2013) 4 - 8) and L-threonine zinc acetate (2) (Puhal Raj and Ramachandra Raja, Photonics and Optoelectronics, 2 (2013) 56 - 64) is reported. Slow evaporation of an aqueous solution containing equimolar quantities of L-proline and succinic acid (for 1) and L-threonine and zinc acetate (for 2) results in the fractional crystallization of succinic acid (in the first case) and L-threonine (in the second case) and not any novel organic non-linear optical (NLO) crystals. In this paper, the usefulness of infrared spectra for correct product characterization is demonstrated.

关键词： L-Proline Succinate L-Threonine Zinc Acetate X-Ray Cell Data IR Spectra Non-Linear Optical Crystals

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Neem by-products in the fight against mosquito-borne diseases:Biotoxicity of neem cake fractions towards the rural malaria vector Anopheles culicifacies(Diptera:Culicidae)

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Asian Pacific Journal of Tropical Biomedicine 2016年第6期6卷 472-476页

作者： Balamurugan Chandramohan Kadarkarai Murugan Pari Madhiyazhagan kalimuthu Kovendan Palanisamy Mahesh Kumar Chellasamy Panneerselvam Devakumar Dinesh Jayapal Subramaniam Rajapandian Rajaganesh Marcello Nicoletti Angelo Canale Giovanni Benelli Division of Entomology Department of ZoologySchool of Life SciencesBharathiar University Department of Biology Faculty of SciencesUniversity of Tabuk Department of Environmental Biology Sapienza University of Rome Department of Agriculture Food and EnvironmentUniversity of Pisa

Objective: To evaluate the ovicidal, larvicidal and adulticidal potential of neem cake fractions of different polarity against the rural malaria vector Anopheles culicifacies(***).Methods: Neem cake fractions' total methanol extract(NTMeOH), total ethyl acetate extract(NTAc OEt), ethyl acetate fraction after repartition with NTMe OH(NRAc OEt),butanol fraction after repartition with NTMeOH(NRBuOH), and aqueous fraction after repartition of NTMeOH(NRH2O) were tested against An. culicifacies eggs, fourth instar larvae and ***: In larvicidal experiments, NTMeOH, NTAcOEt, NRAcOEt, NRBuOH and NRH2O achieved LC50 values of 1.32, 1.50, 1.81, 1.95 and 2.54 mg/L, respectively. All fractions tested at 150 mg/L were able to reduce egg hatchability of more than 50%, with the exception of NTAc OEt and NRAc OEt. In adulticidal assays, NTMeOH, NTAcOEt,NRAcOEt, NRBuOH and NRH2O achieved LC50 values of 3.01, 2.95, 3.23, 3.63 and3.00 mg/L, ***: Overall, this study suggests that the methanolic fractions of neem cake may be considered as a new and cheap source of highly effective compounds against the rural malaria vector An. culicifacies.

关键词： Arbovirus Azadirachta indica Biosafety Botanical by-products Eco-friendly pesticides Mosquito-borne diseases

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