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619 articles for “Subtractive Synthesis”
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Radiation is used in nuclear medicine for damaged tissues or organs treatment by X -Rays
Abstract: Utilizing radioactive particles inside the body, nuclear medicine can diagnose an illness by observing how an organ or tissue is working or by destroying unhealthy or damaged tissue after analysis. The natural environment exposes us to ionizing radiation every day, but additional treatments, such as those resulting from nuclear medicine treatments, may slightly raise the chance of acquiring cancers during later life.To determine the best course of action for your …
Published in Journal of Nuclear Engineering & Technology · Vol. 12, Issue 1, 2022 · pp. 31–34 Read article
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A Study on the Effect of Ionic Conductivity on Addition of Salt for Polymer Nanocomposite Gel Electrolyte for Solar Cell Applications
Abstract: AbstractDye sensitized solar cells (DSSC) have attracted greater attention in the recent years because of their relatively high energy conversion efficiency and low cost. In the DSSCs, the electrolytes play a vital role in the determination of the efficiency and long term stability. In this investigation, we report on the synthesis, characterization and conductivity study of polymer nanocomposite gel electrolyte. Cadmium oxide nanoparticles were added into polymer blend of poly …
Published in Journal of Polymer & Composites · Vol. 3, Issue 3, 2015 · pp. 8–15 Read article
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Studies in Effect of Methyl Methacrylate to Butylacrylate Ratio on the Properties of TiO2/poly(methyl methacrylate-co-butylacrylate) Core–Shell Composite Nanoparticles Prepared by Microemulsion Polymerization
Abstract: AbstractTitanium dioxide, as a core, was coupled with the poly(methyl methacrylate-co-butyl acrylate) using amino propyltriethoxy silane as a coupling agent. A two-stage semi-continuous microemulsion polymerization method was used for the synthesis of these core–shell nanoparticles. Ratio of methyl methacrylate to butyl acrylate was varied in the shell of the nanoparticles and the prepared core–shell composite nanoparticles were characterized by Fourier transform infrared spectroscopy, X-ray diffractometer, differential scanning calorimetry, scanning electron …
Published in Journal of Polymer & Composites · Vol. 1, Issue 3, 2013 · pp. 32–39 Read article
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Studies on Modelling of Mechanical Properties of Polyester-based Semi-rigid Polyurethane Foams
Abstract: This paper describes the mechanical behaviour of castor oil based semi rigid polyurethane foams with relative density below 0.05moulded by varying isocyanate index (Isocyanate equivalent/hydroxyl equivalent) from 1:1 to 1:2. Mechanical properties of polyurethane foam mainly compressive strength is measured experimentally and the values were compared using three widely referred theoretical models namely: (i) the Empirical model (ii) Gibson and Ashby approach widely used for foam description and (iii) modified …
Published in Journal of Polymer & Composites · Vol. 8, Issue 1, 2020 · pp. 77–86 Read article
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Development of Refractory Synthesized from Waste Ceramic Fiber and Chamotte
Abstract: Research on refractory materials is always essential in thermal engineering to ensure both heat savings and environmental protection. Raw materials used initially have a great influence on the production process and product properties. In addition, the refractory products are tested under conditions of high temperature and varying intensity, such as tests of thermal shock resistance. In this study, new refractory composites were prepared by mixing waste ceramic fibers with chamotte …
Published in Journal of Polymer & Composites · Vol. 8, Issue 2, 2020 · pp. 101–109 Read article
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Application of Polypyrrole/Lead Sulphide Nanocomposite in UV Light Assisted Photocatalysis and Gas Sensing
Abstract: The synthesis of ppy/lead sulphide nanocomposite was done using the co-precipitation method. The synthesized ppy/leadsulphide nanocomposite was characterized using Transmission Electron Microscopy (TEM), Selected Area Electron Diffraction (SAED), X-Ray Powder Defraction (XRD), Fourier Transformation Infra-Red Spectroscopy (FTIR), UV-Vis Spectroscopy techniques. The optical bandgap of the synthesized ppy/lead sulphide nanocomposite was observed to be 3.48 eV. The synthesized material is crystalline, with an average crystallite size of 2.51 nm. The photocatalytic …
Published in Journal of Polymer & Composites · Vol. 9, Issue 1, 2021 · pp. 13–27 Read article
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Developments in Functional PVC and Its Composites
Abstract: The main aim of this review study is to summarise the progress and recent modifications in the area of functionalised PVC including chlorinated PVC, PVC copolymers and their composite developments. Functionalized PVC and its copolymers shown very good improved properties which enhanced the PVC application domain as compare to other polymers. Due to the higher chlorine content polyvinyl chloride (PVC) shows higher mechanical and fire-resistive properties which are suitable for …
Published in Journal of Polymer & Composites · Vol. 10, Issue 1, 2022 · pp. 55–67 Read article
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Role of Bimetallic (Ag-Cu) Nanoparticles on the Structural Properties of PVA/PVP Blend Green Nanocomposites
Abstract: This study reports the green synthesis of polymer blend nanocomposites of Polyvinyl alcohol (PVA) and Poly vinylpyrrolidone (PVP) embedded with Silver (Ag), Copper (Cu) mono metallic and Silver-Copper (Ag-Cu) bimetallic nanoparticles (NPs), generated using plant mediated solution casting method. The formation of blend, polymer-polymer interactions, interaction between polymer and nanoparticles and role of the nanoparticles on the interactions among PVA/PVP blend nanocomposites were studies by FTIR spectroscopy. The crystallinity of …
Published in Journal of Polymer & Composites · Vol. 10, Issue 1, 2022 · pp. 11–19 Read article
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Effect of ZrO2 nanoparticles on Electrical conductivity of PVA/PVP polymer blend doped with ammonium iodide
Abstract: This work reports the properties of solid polymer electrolyte films obtained via incorporating varying amounts of ZrO2 nanoparticles into the PVA/PVP polymer blend with ammonium iodide salt. Material synthesis was done by the solution casting technique. Frequency dependent impedance and conductivity parameters of polymer electrolyte films were investigated at different temperatures (303K-353K) using impedance spectroscopy. The results of ionic conductivity of prepared polymer blend samples at various temperatures were studied …
Published in Journal of Polymer & Composites · Vol. 10, Issue 3, 2022 · pp. 85–94 Read article
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Optimization of Drilling Parameters on Hemp-Pineapple Hybrid Natural Fiber Composites
Abstract: Composites are tailor made heterogeneous materials to meet desired mechanical properties for intended applications. Among all the composites, fiber reinforced composites gained wide attention because of ease in synthesis and light weight. Issues such as delamination and surface finish during drilling of composites offers challenges. The present investigation uses design of experimentation method for setting processing parameters such as drill diameter, feed, rotation speed for evaluation of minimum surface roughness …
Published in Journal of Polymer & Composites · Vol. 11, Issue 2, 2023 · pp. 33–39 Read article
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Photoluminescent Reduced Graphene Oxide (rGO)–ZnO Nanocomposites Prepared Through one-pot Solvothermal Route
Abstract: In the present article, we report solvothermal synthesis of reduced graphene oxide (rGO)–ZnO nanocomposites through in situ exfoliations of graphite oxide with two different zinc-containing precursors viz. Zinc acetate dihydrate and zinc(II) acetylacetonate in water-diethylene glycol medium with hexamethylenetetramine as a reducing agent. The obtained rGO–ZnO nanocomposites were characterized by X-ray diffraction, and the ZnO lattice parameters were calculated. Raman spectroscopy indicated the presence of characteristic bands of graphene and …
Published in Journal of Polymer & Composites · Vol. 11, Issue 2, 2023 · pp. 70–80 Read article
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Fabrication of MOF5 -GO nanocomposites by tailoring graphene oxide
Abstract: The present paper focusses on the synthesis of graphene oxide and its nanocomposite with metal organic framework (MOF-5). Graphene oxide (GO) was prepared using modified hummer’s method with different concentrations of oxidizing agent to vary the presence of functional group on the surface of GO. The presence of functional group plays a crucial role in determining the interactions between GO and MOFs. To confirm the presence of different functional groups …
Published in Journal of Polymer & Composites · Vol. 12, Issue 1, 2024 · pp. 101–114 Read article
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A Simplified Indirect Control Scheme for Shunt-active Power Filters
Abstract: This paper presents a simplified indirect control scheme for shunt-active power filters for compensating harmonic currents and improving power factor. The control is based on the simple method for generation of the reference compensating current. The reference compensating current is obtained by subtracting load current from reference source current. PI controller is used to adjust the amplitude of the reference source current that regulates the DC capacitor voltage. Hysteresis band …
Published in Journal of Power Electronics and Power Systems · Vol. 2, Issue 1, 2012 · pp. 1–7 Read article
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Torque Ripple Reduction in Induction Motor Drive Using Direct Torque Control Technique with Space Vector Modulation
Abstract: Three phase squirrel cage induction motor drives are widely used in industries for variable speed applications. This paper proposes the design and simulation of an induction motor (IM) drive with DTC-SVM (Direct Torque Control–Space Vector Modulation). The IGBT/Diode inverter switches are controlled by the DTC-SVM technique. The synthesis of vector selection table depends on the rotational direction of the stator flux vector. The control algorithm in DTC-SVM methods are based …
Published in Journal of Power Electronics and Power Systems · Vol. 5, Issue 1, 2015 · pp. 33–39 Read article
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Polysaccharide based Graft Copolymers and their Applications as Flocculants for Drilling Fluid Wastes
Abstract: Pure water is essential for the survival of living beings. It is used for human consumption, agricultural and industrial activities. During oil and gas well drillinglarge amount of drilling fluid are used. These drilling fluids are mainly water based bentonite solutions which plays a major role in keeping safe and efficient oil and gas well drilling. After their prolonged use, these drilling fluid wastes needs to be disposed of in …
Published in Journal of Petroleum Engineering & Technology · Vol. 8, Issue 2, 2018 · pp. 9–21 Read article
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Design of Fault Tolerant Reversible Comparator
Abstract: Reversible circuits have proved its significance in the synthesis of circuits having their important role in nanotechnology, quantum computing, low power CMOS Design, cryptography and Bioinformatics. The Reversible Gates can be further made more beneficial if they prove themselves to be Fault Tolerant i.e. where errors can be detected and corrected at the same time. This Paper considers parity preserving technique for making Reversible circuits Fault Tolerant. Parity Preserving Gates …
Published in Journal of Semiconductor Devices and Circuits · Vol. 6, Issue 2, 2019 · pp. 13–17 Read article
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Nanowire Photodetectors and Applications: A Review Study
Abstract: The utilization of nanowires and nanowire structures as photodetectors is an arising research subject. Novel gadget structures incorporated in single nanowire gadgets are additionally being effectively contemplated and created. Here, general NW-PD ideas are investigated, along with a point-by-point depiction of the actual phenomenon happening in nanowire photoconductors & phototransistors. Low dimensional frameworks like nanotubes and nanowires have intriguing, and technologically valuable, optical and electrical properties. Studies on these frameworks …
Published in Journal of Semiconductor Devices and Circuits · Vol. 10, Issue 2, 2024 · pp. 15–19 Read article
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Novel Method to Synthesize Thiazole-based Disperse Dyes and its Applications
Abstract: The present work aims to deal with novel method to synthesize thiazole based disperse dyes and its applications.Design/methodology/approach: Azo dyes is tailored for utilization as the most basic and a key ingredient in dyestuff sector with potential applications in textiles, paper, plastics, printing ink, etc. The synthesis of disperse and acid dyes derived from thiazole and pyrazolone as a coupling component. Thiazole based dyes shows antimicrobial activities. The dyeing performance …
Published in Journal of Thin Films, Coating Science Technology & Application · Vol. 6, Issue 3, 2019 · pp. 30–34 Read article
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Silver Particles coating on polypropylene matrix for bacterial filter property
Abstract: Silver particles have a wide range of biomedical applications, including their use as drug. In this paper, we report on the synthesis of silver particles using crude aqueous extract of Manihot esculenta leaf extract. Two different (conventional stirring and ultrasonic) methods were employed in the reduction of AgNO3 process. Native extract as well Ag colloidal extract were checked cytotoxicity against Human Cervical Carcinoma cell. The anti cancer results achieved excellent …
Published in Journal of Thin Films, Coating Science Technology & Application · Vol. 7, Issue 3, 2020 · pp. 16–25 Read article
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An Overview of the Design and Optimization of Antennas Employing Machine Learning Algorithms and Methodologies
Abstract: This paper offers a comprehensive exploration of the integration of machine learning (ML) techniques in antenna design and optimization, reflecting the burgeoning interest and potential impact of ML in emerging technologies. The first segment conducts a detailed literature survey, elucidating conventional computational electromagnetic and numerical methods preceding an in-depth discussion on the core facets of ML, encompassing diverse learning categories and frameworks. Additionally, it provides a mathematical exposition on regression …
Published in Journal of Telecommunication, Switching Systems and Networks · Vol. 10, Issue 3, 2023 · pp. 1–12 Read article