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214 articles for “Metals Concentration”
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Biochemical Assays of Crude and Purified Oxycarotenoid Extracts Isolated from Coriander Leaves and their Effect on Oxidative Stability of Oils by Rancimat Assay
Abstract: Antioxidants are important substances in the fight against the damage done by free radicals that are produced by oxidative stress. Antioxidants are available in various forms as dietary supplements/synthetic forms. Because of their toxicity and side effects, the extensive use of many of these synthetic antioxidants is ruled out. Most nutritionist agrees that, the natural food is the best source of antioxidants. Dietary antioxidants have the ability to scavenge free …
Published in Research and Reviews : A Journal of Biotechnology · Vol. 8, Issue 1, 2018 · pp. 1–10 Read article
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Reduction of Short Channel Effects with the Variation of Poly Doping and Source/Drain Doping
Abstract: In this paper, the concentration of poly-silicon doping and source/drain doping has been varied to obtain the approximation the OFF state leakage current for N channel MOSFET. A lightly doped NMOS has been designed using 45 nm technology in ATHENA and simulated in ATLAS of SILVACO TCAD tool. After simulation results, it has been observed that as the poly-silicon doping and source drain doping concentrations are decreased, there is a …
Published in Journal of Semiconductor Devices and Circuits · Vol. 4, Issue 3, 2017 · pp. 35–42 Read article
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Hexavalent Chromium Resistance Test of Saccharomyces Cerevisiae and Modeling of its Bioaccumulation Process
Abstract: Now a day, the release of high chromium containing tannery waste water from tanning industries to the environment is the life threatening action of human activities and bioaccumulation becomes a better alternative in treating heavy metals(such as Cr(VI) )due to its cost effective, relatively high heavy metal removal capacity and recovery property. Cell suspensions of S.cerevisiae at its exponential growth phase were added to 250 ml plastic flasks of containing …
Published in Emerging Trends in Chemical Engineering · Vol. 8, Issue 1, 2021 · pp. 36–44 Read article
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Comparative Study of Oxidation and Hot Corrosion Behavior of Uncoated and Detonation Gun Sprayed Cr3C2-25NiCr Coating on SA516 Boiler Steel at 800°C
Abstract: In the present investigation Cr3C2-25NiCr powder was deposited on boiler steel SA 516 (Grade 70) by detonation gun process. The oxidation and hot corrosion performance of coated as well as bare boiler steel was studying in the air and aggressive environment of Na2SO4–50% NaCl under cyclic conditions at an elevated temperature of 8000C. Oxidation and hot corrosion of metals and alloys has been recognized as a serious problem for elevated-temperature …
Published in Journal of Aerospace Engineering & Technology · Vol. 8, Issue 1, 2018 · pp. 5–10 Read article
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Determination of Selected Essential (Copper, Zinc) and Non-essential (Lead, Chromium, Cadmium) Heavy Metals in Some Single-use Plastics from Sokoto Metropolis, Nigeria
Abstract: Background and objectives: The objective of this study is to conduct Atomic Absorption Spectroscopy Analysis of selected essential (Cu, and Zn) and non-essential heavy metals (Cr, Cd, and Pb) in selected different single-use plastics that are in contact with food from Sokoto, Nigeria. Methods: The levels/concentrations of heavy metals in plastics were determined using atomic absorption spectroscopy. Findings: Copper levels range of 0.05000.001 to 0.90100.001 (ppm), while zinc levels are …
Published in Journal of Materials & Metallurgical Engineering · Vol. 12, Issue 3, 2022 · pp. 29–37 Read article
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Reddish-orange Emission in Pr3+-V4+ Doped Ions in Calcium Lead Borosilicate Glasses for Photonics and Sensor Applications
Abstract: CaO-PbO-B2O3-SiO2:Pr2O3-V2O5 synthetic glasses were made using a traditional melt-quench method. In the UV-vis-NIR range, the optical absorption spectra show distinct transitions from different energy levels where simple Pr3+ ions are present. The absorption transition of V4+ ion identity exhibit 2T2g®2E2g (spin-allowed) single transition in the UV-vis region Because of the presence of the paramagnetic VO2+ ion, the EPR spectra showed high intensity hyperfine splitting of two sets of eight lines …
Published in Journal of Semiconductor Devices and Circuits · Vol. 10, Issue 3, 2024 · pp. 33–50 Read article
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Antioxidant Activity in Se-Enriched Edible Mushrooms
Abstract: Mushrooms enriched with essential minerals, such as selenium (Se), are food that compensate for dietary nutrient deficiencies. Extracts from Se-enriched Pleurotusostreatus and Lentinula edodes mushrooms contain active antioxidant compounds, which enhance the immune system. To evaluate whether Se-enrichment changes antioxidant and lipid peroxidation potential, the concentration of total phenolic compounds, antioxidant activity, lipid peroxidation and the total concentration of minerals (Mn, Fe, Cu, Zn, V, Cr, Co, Ni, As, Cd …
Published in Research & Reviews : Journal of Food Science & Technology · Vol. 9, Issue 3, 2020 · pp. 28–34 Read article
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Centrifugal Casting of Nano Crystalline TiB2 Reinforcement Particulate Reinforcement in Al-Alloy Matrix
Abstract: A method of producing Nano size TiB2 particles within an aluminium matrix is the in situ reaction synthesis method, using KBF4 and K2TiF6 potassium based bearing fluxes. The advantages of this in situ reactive process are a small particle size and good particle/matrix interfacial bonding. However, this method is limited to producing low particulate volume percentage material (˂6 vol%). To overcome this limitation, centrifugal casting has been investigated. A series …
Published in Journal of Materials & Metallurgical Engineering · Vol. 3, Issue 3, 2013 · pp. 7–13 Read article
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Sub-nano Regime DG-MOSFETs
Abstract: AbstractThe significance of device performance of Gallium Nitride based double gate metal-oxide- semiconductor field-effect-transistor has been executed. The simulations were done by Silvaco Atlas simulation software with focusing on non-equilibrium green function (NEGF). Multiple gate length (LG=9.1 nm) was observed to distinguish the transfer characteristics curve. The other concentration was observed for device ON-State Current (ION), OFF-State Current (IOFF), Drain Induced Barrier Lowering (DIBL), Sub Threshold Slope (SS) and Electric …
Published in Journal of Semiconductor Devices and Circuits · Vol. 5, Issue 3, 2018 · pp. 1–6 Read article
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Removal of Chromium (VI) from Synthetic Waste Water using Tea waste as a Low Cost Adsorbent
Abstract: Industrial feed various harmful heavy metals which contaminant not only soil but also water resources. There are at least 20 heavy metals which cannot be damaged. In this Case, removal of Chromium (VI) from the synthetic wastewater has been investigated by using Tea Waste adsorbent as a useful natural adsorbent. The Case was performed using experiments with synthetic waste water having Cr (VI) in higher concentration. The adsorption experiments were …
Published in Journal of Water Pollution & Purification Research · Vol. 2, Issue 2, 2015 · pp. 1–4 Read article
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An Analysis of Machining Parameters for Metal Matrix Composite
Abstract: The electro-discharge machining analysis of hybrid Composite is presented in this work. Variables are chosen for the input process parameters. The material removal rate is acknowledged as an output parameter, together with the current, graphite and silicon carbide percentage and pulse on time. We used the Taguchi Method to conduct our experiments. To create the theoretical model and look into how process parameters affect the rate at which material is …
Published in Journal of Polymer & Composites · Vol. 13, Issue 2, 2025 · pp. 76–85 Read article
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Finite Element Analysis of Double Fillet Weld
Abstract: Finite element analysis of the double fillet weld joint has been conducted in the present paper. Analysis of stress generated at the weld toes and weld root has been conducted and shown. Fine meshing near the weld toes and root has been adopted for accurate results. Fillet weld considered in the present study have two vertical plates, which are attached to a horizontal plate by welding. Study reveals that weld …
Published in Journal of Instrumentation Technology & Innovations · Vol. 6, Issue 2, 2016 · pp. 28–33 Read article
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Monitoring and Modeling of Atmospheric Change Indices In Parts of Imo State Using GIS, MATLAB and ANN
Abstract: Geographic Information System (GIS) and Matrix Laboratory (MATLAB) Models were used to study air quality in parts of Imo State. Primary data were obtained by conducting relevant analysis using standard instrumental methods on open-air rainwater samples collected in the dry and the rainy seasons for two consecutive years. GIS showed that the pollutants were present throughout the year. Artificial Neural Network (ANN) of MATLAB 2015 was used to represent data …
Published in Journal of Modern Chemistry & Chemical Technology · Vol. 15, Issue 1, 2024 · pp. 25–74 Read article
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Thermo-Hydraulic Performance of a Double-Pipe Double-Pass Heat Exchanger using Annular Fins and Graphite-filled Epoxy Composite Tubes
Abstract: Double-pipe heat exchangers remain one of the most widely adopted thermal devices because of their simple construction, operational reliability, and ease of maintenance. Nevertheless, their performance is often constrained by the limited heat transfer area of smooth tubes and the long-term challenges associated with metallic materials, including corrosion, scaling, and structural weight. Recent advances in thermally conductive polymer composites provide an opportunity to overcome these limitations by replacing conventional metals …
Published in Journal of Polymer & Composites · Vol. 14, Issue 5, 2026 Read article
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Carbon Nanotubes: A Potential Reinforcement Material for Composites
Abstract: AbstractSince their invention almost 10 years ago by Iijima, carbon nanotubes have been the concentration of significant research. Various researchers have since then have reported surprising physical and mechanical properties for this new type of carbon. Having exceptional mechanical properties including strength, modulus, stiffness which exceeds all current materials, carbon nanotubes offer tremendous opportunities for the development of fundamentally new nanotubes reinforced metal matrix or metal ceramics composite materials for …
Published in Nano Trends – A Journal of Nano Technology & Its Applications · Vol. 19, Issue 2, 2017 · pp. 42–49 Read article
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In Vivo Biocompatibility and Interfacial Stability of Thermoplastic Polyurethanes and Nanofilled Resin Composites: A Bioanalytical Study of Polymer-Host Interactions Under Dynamic Loading
Abstract: The widespread application of thermoplastic polyurethanes (TPU) and nanofilled resin composites in biomedical devices requires rigorous assessment of their biocompatibility under mechanical stress. While nanofilled composites utilize filler particles (<100 nm) to enhance surface properties and wear resistance, the biological response to these materials in a hydrolytic, enzymatic environment remains a critical area of investigation. Objective: To analyze the in vivo bio-molecular response at the interface of TPU aligners and …
Published in Journal of Polymer & Composites · Vol. 14, Issue 1, 2026 · pp. 1112–1119 Read article
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Physiological and Anatomical Study of The role of Phytoremediation of Mustard Plant in Reducing Pollutants in Najaf Governorate/Iraq
Abstract: The experiment was conducted in Najaf Governorate / Iraq during the winter of 2023 to determine the types of some heavy metals in Najovernorate and to know the role of phytoremediation of mustard plant in absorbing these heavy metals and the plant's response to these pollutants by measuring some nutrients and heavy metals and studying some anatomical characteristics. Large pots were used in the experiment and distributed after a month …
Published in OmniScience: A Multi-disciplinary Journal · Vol. 15, Issue 3, 2025 · pp. 20–36 Read article
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Investigation of the Thermoelectric, Electronic Band Profile, and Structural Properties of Skutterudites Based on Cobalt and Antimony
Abstract: We investigated ThCo4Sb12, an actinium-filled skutterudite, from the ground up for structural, electronic, and thermoelectric properties. A generalized gradient approximation and modified BeckeJohnson potentials were used to calculate the exchange-correlation potential. The compound is shown to have metallic properties in the electronic structure calculations. Actinium series element is used as a void filler in this study. The Seebeck coefficient and electrical conductivity can be calculated using Boltzmann's transport theory. According …
Published in Journal of Structural Engineering and Management · Vol. 11, Issue 2, 2024 · pp. 13–19 Read article
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Estimating Heavy Ion Concentrations in the Shatt AlKufa Area and Studying Methods for Recycling Wastewater
Abstract: This study includes practical methods for treating chemical pollution in wastewater. The proper disposal of wastewater is essential for providing a healthy environment for communities, adhering to international standards and utilizing the latest chemical and scientific methods to maintain a surrounding environment free from sewage pollutants. The goal of wastewater treatment is to prepare it for discharge into agricultural drains or for use in irrigation. Treatment removes a large percentage …
Published in Journal of Catalyst & Catalysis · Vol. 13, Issue 1, 2026 · pp. 17–22 Read article
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Hybrid Solar PV–Wind Energy System: A Performance Study
Abstract: The solar PV and, wind energy hybrid technology is based on the concept of a modular, scalable, distributed renewable energy system designed and optimized for on and off grid installations. This kind of system is fully integrated hybrid system that combines wind energy units with PV technology in a compact footprint, creating the greatest energy generation density. The hybrid concept is unique and disruptive, seamlessly utilizing wind and solar energy …
Published in Journal of Electronic Design Technology · Vol. 8, Issue 1, 2017 · pp. 7–10 Read article