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1122 articles for “Concentricity”
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Harnessing Marine Byproducts and Optimization of Biopolymer Extraction Quality Using Response Surface Methodology and Study of Its Physicochemical Properties
Abstract: Chitosan, a versatile biopolymer derived from chitin, holds immense potential across various industries owing to its antimicrobial, antioxidant, and biocompatible properties. This study aims to optimize the deacetylation process of chitin, sourced from shrimp shells, using Response Surface Methodology (RSM) to produce high-quality chitosan. The Box-Behnken Design (BBD) was employed to evaluate the effects of temperature, time, and alkali concentration on the degree of deacetylation (DD%), a key determinant of …
Published in Journal of Polymer & Composites · Vol. 13, Issue 1, 2025 · pp. 125–139 Read article
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Stimulation of Plant Growth Promoting Rhizobacteria with ZnO Nanoparticles to Improve Growth and Development of Groundnut Plants (Arachis Hypogaea L.)
Abstract: Rhizobacteria that stimulate plant growth have been extensively utilized as biofertilizers to improve the nutrient content of the soil for various crop plants. In the present study, we have isolated plant growth promoting rhizobacteria (PGPR) for rhizospheric soil of groundnut crops from Gujarat agricultural fields in the Saurashtra region. Fifty-two isolates with particular colony characteristics were obtained from rhizospheric soil. All strain was tested for their plant growth promoting (PGP) …
Published in Journal of Polymer & Composites · Vol. 12, Issue 6, 2024 · pp. 253–269 Read article
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Effect of Surface Modification on Properties of Kevlar/Epoxy Polymer Composites
Abstract: In this study, a high-performance Kevlar/epoxy polymer composite was prepared using a hand lay-up technique. The Kevlar fiber was treated with calcium chloride/ethanol solution (CaCl2/EtOH) to enhance the interfacial interaction between the fiber and the epoxy matrix. The optimization of fiber surface treatment and fiber content for the best tensile strength (TS) of Kevlar/epoxy polymer composite was achieved using Box-Behnken design (BBD) through response surface methodology (RSM). Three parameters: CaCl2 …
Published in Journal of Polymer & Composites · Vol. 13, Issue 2, 2025 · pp. 35–46 Read article
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Unraveling Mixed Ionic-Electronic Conduction in Lithium-Substituted Rubidium Tetra Titanates via Dielectric Spectroscopy and EPR Analysis
Abstract: Lithium-substituted Rubidium Tetra Titanates with varying concentrations of lithium carbonate (Li₂CO₃) — specifically 0.01, 0.05, and 0.1 molar percentages — were successfully synthesized using a conventional high-temperature solid-state reaction method. The resulting compounds follow the general chemical formula Rb₂₋ₓLiₓTi₄O₉. X-ray diffraction (XRD) analysis confirmed that lithium ions were successfully incorporated into the crystal lattice without disrupting the fundamental layered structure of the host material. The crystal system remained monoclinic across …
Published in Research & Reviews : Journal of Physics · Vol. 14, Issue 2, 2025 · pp. 19–29 Read article
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Aluminum Oxide Nanofluids Thermal Conductivity Enhancement Analysis: A Review
Abstract: Aluminum oxide nanofluids are enhanced heat transfer fluids that utilize the thermal conductivity of aluminum oxide (Al2O3) nanoparticles suspended within a base fluid. As technology advances, more efficient high heat flux solutions are required to manage the higher concentration of power in smaller designs. In this review paper, data from multiple experiments pertaining to the thermal conductivity of Al2O3 nanofluids will be presented. Information is compiled from peer reviewed and …
Published in Journal of Thermal Engineering and Applications · Vol. 9, Issue 2, 2022 · pp. 48–58 Read article
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Role of Reactive Extraction in Removal of Phenol from Wastewater
Abstract: Phenol is one of the most common organic water pollutants as it is highly toxic even at low concentration. Also, its presence in natural water can lead to the formation of substituted compounds during disinfection and oxidation processes. Reactive extraction method is found to be a capable alternate for separation of medium (300–3000 mg/l) to high (3000–6000 mg/l) concentration of phenol. The degree of extraction depends on nature of extractant, …
Published in Emerging Trends in Chemical Engineering · Vol. 3, Issue 1, 2016 · pp. 19–25 Read article
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Characterization of Activated Carbon Prepared from Citrus Sinensis (Orange) Peels by X-ray Fluorescence Spectroscopy (XRF)
Abstract: The orange (specifically, the sweet orange) is the fruit of the citrus species Citrus sinensis in the family rutaceae. Citrus sinensis (orange) fruit is one of the common traditional plants grown in many areas in India. The wastes of the Citrus sinensis (orange) fruit called orange peels were used to prepare activated carbon through chemical activation method. The activated carbon is an excellent adsorbent and its applications are widely described …
Published in Emerging Trends in Chemical Engineering · Vol. 2, Issue 3, 2015 · pp. 50–52 Read article
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A Novel Approach for Extraction of Polyphenols
Abstract: Polyphenols are class of compounds which are found in fruits, vegetables, walnuts, olives, tea leaves and many more. Polyphenols are antioxidant phyto-chemicals that prevent or neutralize the damaging effects of free radicals. They are secondary metabolites of plants and are generally involved in defence against ultra-violet radiation or aggression against pathogens. Polyphenols are various alcoholic compounds containing two or more benzene rings that each has at least one hydroxyl group …
Published in Emerging Trends in Chemical Engineering · Vol. 1, Issue 1, 2014 · pp. 31–36 Read article
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Flow Reversal and Pressure pulsation: Innovative technique to enhance flux in Nanofiltration
Abstract: Reduction in Permeate flux with the period of time is the major drawback for the Pressure-driven membrane processes. Concentration polarization and membrane fouling are the two major limitations for the Pressure-driven membrane filtration processes. They lead to the severe flux decline and that need to be controlled for the better process efficiency. The resistance determination provides basis for selection of membrane and appropriate pressure –driven separation process. This paper outlines …
Published in Emerging Trends in Chemical Engineering · Vol. 6, Issue 3, 2019 · pp. 1–7 Read article
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Using of the sea grasses for the removal of some industrial organic dyes; bromo cresol purple from aqueous solutions
Abstract: Abstract: The objectives of this study are evaluating the efficiency of low cost adsorbents of activated carbon obtained from sea grasses. Using the sea grasses for the removal of some industrial organic dye; bromo cresol purple indicators from aqueous solutions and studying the impact of some of the factors including different dosages , pH, different concentrations, different temperature and effect of time of adsorbed materials. Adsorption efficiency of dye onto …
Published in Emerging Trends in Chemical Engineering · Vol. 6, Issue 3, 2019 · pp. 29–36 Read article
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Substantial Enrichment of Mechanical, Thermal and Electrical Properties of Thermoplastic Polyester Elastomer by Melt Blending with Nano-ZnO
Abstract: Polymers are more reinforced with nano-metal oxides, a completely flexible composite of engineering that simplifies the way of exhibiting good mechanical and chemical features. Polymer mixtures represent a very vital field in the handling of innovative ingredients, which have better features than net polymers. Polymer mixtures can deliver ingredients with prolonged useful features beyond the range that can be achieved from a single polymer equivalent. A methodical study was performed …
Published in Emerging Trends in Chemical Engineering · Vol. 9, Issue 1, 2022 · pp. 12–22 Read article
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Fresnel Lens with Advanced Fabricated Setup for Day Long Production of Hot Water
Abstract: AbstractThis work has been aimed to tap the solar energy source from Fresnel lens and utilize it to produce hot water or steam. The fabricated setup consists of a large spot Fresnel lens which concentrates the sun's rays into a 1 cm2 square spot onto a copper tube with temperature reaching up to 200°C. This concentrated heat is focussed on copper tube absorber to heat the water, the hot water …
Published in Journal of Alternate Energy Sources & Technologies · Vol. 9, Issue 1, 2018 · pp. 15–19 Read article
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Production of Jatropha curcas L. Seed Oil DMC-Js-BioDs by Optimized Dimethyl Carbonate Using Potassium Hydroxide as Catalyst
Abstract: AbstractThe use of Jatropha curcus L. seed oil as the feedstock for biodiesel (DMC-Js-BioDs) production has observed growing interest because it is a non-edible oil. In this study, the production of DMC-Js-BioDs from J. curcas seed oil with dimethyl carbonate (DMC) as the solvent was performed. The reaction was conducted in the presence of KOH as a catalyst to investigate the optimum conditions and study the effects of the variables …
Published in Journal of Alternate Energy Sources & Technologies · Vol. 8, Issue 2, 2017 · pp. 56–63 Read article
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Review on Design and Development of Hydrogen Production System using HHO Dry Cell Method
Abstract: The current work aims to review an experimental setup for the production of HHO gas. It involves the production of HHO gas by dry cell method, and selecting an appropriate electrolyte for production of HHO gas. The system involves sizing and selection of components like bubbler, measuring devices, moisture removal dryer and safety device like flash back arrestor. HHO gas thus produced can be used in a brazing, welding and …
Published in Journal of Alternate Energy Sources & Technologies · Vol. 7, Issue 2, 2016 · pp. 56–59 Read article
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Optimization of Operational Parameters for Production of Bio-ethanol from Red Gram Straw
Abstract: AbstractBio-alcohol is a neat and cleaner source of energy, which could be obtained from locally available biomass. However, the complex structure of lignocellulose in biomass makes a primary protective barrier that prevents cell destruction. In order to break down this structure for the conversion of biomass to fuel ethanol, the cellulose and hemicellulosic materials must be broken down to corresponding monomers (sugars). It could be done easily with acid hydrolysis …
Published in Journal of Alternate Energy Sources & Technologies · Vol. 10, Issue 2, 2019 · pp. 13–17 Read article
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Extraction and Characterization of Antioxidants from the Seeds of Ethiopian Avocado Variety, Pinkerton
Abstract: The objective of this study was to extract and characterize the antioxidants from the Ethiopian avocado seeds of the Pinkerton variety, using ethanol as a solvent. Response surface methodology (RSM) in combination with Box-Behnken experimental design with a three level, three-factor mixture design was used to optimize the extraction condition for assessing the maximum yield of antioxidant from the avocado seeds. Ethanol concentration (%, v/v), temperature (°C) and time (h) …
Published in Journal of Catalyst & Catalysis · Vol. 4, Issue 3, 2017 · pp. 49–56 Read article
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PREPARATION AND CHARACTERIZATION OF ACTIVATED CARBON FROM ORANGE PEELS
Abstract: In this study, an attempt was made to establish Green Energy from agricultural waste (orange peels). Activated carbon (AC) produced from orange peels with chemical activation agent i.e. phosphoric acid (H3PO4) by carbonization activation process. The influences of the process, carbonization temperature and activation temperature (600 °C) for time 2 hour with H3PO4 of 1:1 ratio on the resulting activated carbon properties were evaluated. The AC is an excellent adsorbent …
Published in Journal of Catalyst & Catalysis · Vol. 5, Issue 1, 2018 · pp. 15–20 Read article
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Production of Glucose from Corn cobs using dilute sulfuric acid
Abstract: AbstractCorn cob, a waste residue of corn can be used as substrates for the production of reducing sugar (glucose). This research is aimed to study of the effect of acid concentration, time and temperature for a high yield of reducing sugar from Corn cob. A three-variable, three-level Box-Behnken design was used to develop a statistical model for the optimization of the process variables. The optimal hydrolysis situations that resulted in …
Published in Journal of Catalyst & Catalysis · Vol. 6, Issue 1, 2019 · pp. 21–27 Read article
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The Comparative Catalytic Activities of Tungstate and Molybdate Ions on Oxygen Transfer Reactions Used in Production of Some Petrochemicals
Abstract: The comparative catalytic activities and kinetics of formation of glycerine from oxidation of allyl alcohol by hydrogen peroxide in the presence of sodium tungstate and sodium molybdate as catalyst have been studied. The reaction is zero order with respect to hydrogen peroxide concentration and the reaction is first order with respect to allyl alcohol and catalyst (sodium tungstate or sodium molybdate) concentrations. Tungstate catalyzed formation of glycerine from allyl alcohol …
Published in Journal of Catalyst & Catalysis · Vol. 4, Issue 1, 2017 · pp. 24–29 Read article
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Preparation and Characterization of Activated Carbon from Bamboo by Chemical Activation
Abstract: In this study, an attempt was made to prepare an activated carbon (AC) from bamboo by chemical activation method. Phosphoric acid (H3PO4) was used as a chemical activation agent for the production of AC from bamboo under conditions of temperature 600 °C for 1 h. The AC is an excellent adsorbent and its applications are widely described in literatures. Prepared ACs, are characterized by standard methods XRD, SEM, FTIR, XRF. …
Published in Journal of Catalyst & Catalysis · Vol. 3, Issue 1, 2016 · pp. 1–6 Read article