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172 articles for “absorption”
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One-Step Fabrication of Superomniphobic Pvdf-HFPSiO2Membrane for Long-Term CO2 Absorption inMembrane Gas Absorption System
Abstract: Membrane pore wetting is one of the major challenges for membrane gas absorption, especially when low surface tension liquid absorbents such as amine absorbents are utilized. To minimize diffusion resistance across the membrane, maintaining a non-wetted operating mode in membrane gas absorption is crucial. In this study, a superomniphobic polyvinylidene fluoride-cohexafluoropropylene membrane was fabricated by adding silica nanoparticles (SiO2) in an ethanol coagulation bath through non-solvent-induced phase separation. The surface …
Published in International Journal of Composite Materials and Matrices · Vol. 10, Issue 2, 2024 · pp. 35–44 Read article
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Numerical Analysis of Energy Absorption Ability of Polygonal Tubes under Crushing
Abstract: Honeycomb panels are used mostly in energy absorption application in engineering fields such as aerospace, transportation and packaging, etc. Honeycomb panels have good stiffness and are weight efficient structures. The honeycomb core consists of cellular cells. The core cell’s geometry of honeycomb affects the energy absorption ability. In this study, the different geometries of individual cell are analysed in tube form. Tubes of different geometries like square, pentagon, hexagon, octagon, …
Published in International Journal of Structural Mechanics and Finite Elements · Vol. 7, Issue 1, 2021 · pp. 22–30 Read article
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Sub-structure Geometry Effect on Energy Absorption Ability of Hierarchical Honeycomb under Crushing
Abstract: Honeycomb structures are stiff and light weight composite structures which show good energy absorption. Hierarchical honeycomb structures which are bio-inspired innovative form of honeycomb structure, are used for energy absorption applications. The crashworthiness of hierarchical honeycomb structures is function of sub-structure geometry. In the present investigation, crushing of vertex based hierarchical honeycomb with regular polygonal (n=3, 6, 9, 12, 15) and circular substructures is analysed using nonlinear explicit finite element …
Published in International Journal of Structural Mechanics and Finite Elements · Vol. 7, Issue 2, 2021 · pp. 1–17 Read article
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Suitability of Methyldiethanolamine (MDEA) and Piperazine (PZ) for Improving CO2 Absorption Efficiency Using Rotating Packed Bed (RPB) Technology: A Modeling and Simulation Study
Abstract: Carbon dioxide (CO2) capture and storage (CCS) is an essential technology for reducing atmospheric CO2 emissions and mitigating climate change, especially in fossil-fuel power generation. However, the high cost of CCS technologies has hindered their widespread adoption. In this study, we modeled CO2 removal using a rotating packed bed (RPB) technology using Visual Fortran and Aspen Plus software. We made use of a blended amine solution including different molar concentration …
Published in International Journal of Chemical Engineering and Processing · Vol. 9, Issue 2, 2023 · pp. 9–15 Read article
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Influence of Rubber Particle Size on the Ductility and Energy Absorption of Structural Elements
Abstract: Abstract This research investigates how the rubber particle sizes influence the ductility and energy absorption of structural members made of RC. For this analysis, the different types of waste tire rubbers (with a grains size of 1–2 mm, 3–5 mm, and 6–10 mm) were partially replaced for fine aggre-gates. The compressive strengths, load-deflection behaviors, ductility ratios and energy dissipation properties are discussed by means of experimental mix design analysis and …
Published in International Journal of Structural Engineering and Analysis · Vol. 12, Issue 1, 2026 Read article
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Performance Evaluation of Geopolymer Masonry Units Using Fly Ash and GGBFS: Dimensionality, Density, Water Absorption, and Compressive Strength Analysis
Abstract: AbstractThis study investigates the production, properties, and performance of geopolymer masonry units,utilizing Class F fly ash and Ground Granulated Blast Furnace Slag (GGBFS) as primary binders.These binders were activated using an 8M alkaline solution, with the materials mixed alongsidemanufactured sand (M-sand) as the fine aggregate. The binder-to-aggregate ratio was maintained at1:1, while the alkaline solution-to-binder ratio was kept at 0.2. Various geopolymer masonry units,including geopolymer bricks (GPB), solid blocks (GPSB), …
Published in International Journal of Construction Engineering and Planning · Vol. 10, Issue 2, 2024 · pp. 26–32 Read article
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Fe, Cr, Cu, Ni and Mn Concentration Determination from Matatilla Water System by Atomic Absorption Spectroscopy
Abstract: This study was conducted to assess the extent of heavy metal in the Matatilla Dam water systems. Water quality is effect by the many substance water contacts during its movement through the hydrological system. Water dissolves a wide variety of minerals, nutrients and other substance from soils, rocks and atmosphere carries them in water system. Lake streams and ground water accumulate these dissolve substance and reflect distinctive characteristic of this …
Published in International Journal of Green Chemistry · Vol. 1, Issue 2, 2015 · pp. 1–7 Read article
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The Study of Electrical Performance of Perovskite (CH3NH3PbX3, X=I, Br, Cl) Solar Cell at Different Absorption Coefficient
Abstract: Electrical Performance and numerical simulation of perovskite solar cells were carried out utilizing perovskite materials such "methyl ammonium lead halide (MAPbX3, MA= CH3NH3, X=I, Br, Cl)" with different absorption coefficients with the help of SCAPS tools and calculated the open-circuit voltage (Voc), fill factor (FF), power conversion efficiency (PCE), and short-circuit current density (Jsc) of the MAPbI3, MAPbBr3 and MAPbCl3 material used as active layer, respectively. The hole transport layer …
Published in International Journal of Electrical Power System and Technology · Vol. 9, Issue 1, 2023 · pp. 16–22 Read article
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DIRECT DETERMINATION OF AMOXICILLIN SODIUM IN ITS PURE AND DOSAGE FORMS USING ATOMIC ABSORPTION SPECTROMETRY BASED ON ITS SODIUM CONTENT.
Abstract: Atomic absorbtion spectrometic method has been developed and validated for direct determination of amoxicillin sodium in its pure and pharmaceutical dosage forms based on its sodium content at λ 589 nm. The developed method was found to be time and cost saving and has no tedious or complex procedures. The developed method is very sensetive regarding LOD (0.025 ppm of sodium equivalent to 0.423 μg mL-1), LOQ (0.076 ppm of …
Published in International Journal of Analytical and Applied Chemistry · Vol. 4, Issue 1, 2018 · pp. 36–41 Read article
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Compressive Strength, Water Absorption and Temperature Effects on Partial Replacing Cement with GGBS, Micro Silica and Fly Ash
Abstract: Widespread research work for decades also in development throughout the globe in concrete technology in finding substitute materials which can incompletely change Pozzolonic Portland Cement (PPC) and which can also meet the necessities of the strength and durability performance of industrial by products like micro silica, ground granulated blast furnace slag, fly ash, etc. now termed as complimentary cementations materials (CCM) are quite promising. The increased quest for sustainable and …
Published in International Journal of Construction Engineering and Planning · Vol. 4, Issue 2, 2018 · pp. 30–37 Read article
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A Review on Iron Nanoparticles for Food Fortification with Iron Deficiency Anemia
Abstract: Iron deficiency anemia (IDA) is a global health problem that affects people of all ages. Of the many options available, salt supplementation is the best and most cost-effective way to ensure nutritious food security in a large community. Stabilization of Fe salts is a difficult task because most iron compounds (ferrous sulfate, ferric chloride) used for concentration are soluble in water. It has been established that the size of iron …
Published in International journal of Nanobiotechnology · Vol. 8, Issue 1, 2022 · pp. 13–19 Read article
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Analytical Evaluation of heavy metals in eyeshadows: A Risk assessment and Implications for Public Health Regulatory Reforms in Nigeria
Abstract: This study employs advanced analytical techniques to assess heavy metal contamination (Pb, Cd, Cr, Ni, Zn) in 18 commercially available eyeshadow products (local and imported) from Owerri Metropolis, Nigeria. Quantification was conducted using atomic absorption spectroscopy (AAS), while risk evaluations incorporated chemometric modeling approaches. Results revealed significant contamination in locally manufactured brands, particularly those containing calabash chalk (Nzu) as a base ingredient. Lead and nickel concentrations reached 166.58 ± 6.5 …
Published in International Journal of Analytical and Applied Chemistry · Vol. 12, Issue 1, 2026 Read article
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Fabrication of a Cost-Effective Bulletproof Vest Made of Composite Materials
Abstract: Bulletproof vests have evolved significantly, with composite materials like felt, M Sand, and silicone rubber sealant ushering in a new era of personal protection. These unconventional composites offer a unique blend of ballistic resistance, cost-efficiency, and wearer comfort. Felt, a pliable material, adds a layer of protection by effectively absorbing and dissipating kinetic energy from projectile impacts. Its flexibility enhances wearer comfort, setting it apart from traditional materials’ Sand, a …
Published in International Journal of Manufacturing and Materials Processing · Vol. 10, Issue 2, 2024 · pp. 16–31 Read article
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PHYSICOCHEMICAL PROPERTIES OF BROWNTOP MILLET AND EVALUATION OF ITS SUITABILITY IN PRODUCT FORMULATION
Abstract: The present study aims to investigate the physicochemical properties of Browntop millet, comparing it with refined wheat flour and evaluation of its suitability in product formulation. The proximate composition (moisture, ash, protein, fat and crude fiber) and functional properties (solubility, swelling power, water absorption capacity, oil absorption capacity andbulk density) were studied using AACC standard methods. The product bread was formulated by replacement of refined wheat flour of different levels …
Published in International Journal of Industrial Biotechnology and Biomaterials · Vol. 9, Issue 1, 2023 · pp. 18–27 Read article
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Development of Plant Based Iron Rich Food Products and Their Efficacy Evaluation Using Food Based Approach
Abstract: Iron deficiency anemia (IDA) is the most wide spread nutritional problem and affects over 2 billion people. The main reason for IDA has been determined to be inadequate intake of iron and low bioavailability (1-6%) of dietary iron from plant foods. Food based approaches to addressing IDA in India are being promoted, but information on to what extent food combination would improve the bioavailability of iron is fragmentary. Vitamin C …
Published in International Journal of Agrochemistry · Vol. 8, Issue 1, 2022 · pp. 23–42 Read article
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Effect of varying water temperature on concrete properties
Abstract: The aim of this paper is to determine the effects of mixing-water temperature on the compressive strength, workability and water absorption rate of concrete. Locally available materials were used. Compression tests results showed that the 7 days value of 19.52N/mm2 at 35°C was higher than the value of 9.96N/mm2 at 5°C. The 28th day results for compression test also showed similar trend. The workability of the concrete decreased as the …
Published in International Journal of Concrete Technology · Vol. 6, Issue 1, 2020 · pp. 1–6 Read article
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Potential of Limestone Powder in the Production of Self Compacting Concrete
Abstract: Self-compacting concrete (SCC) is a cutting-edge building material. It's a smooth, durable concrete that fills the formwork completely. The SCC needs a lot of powder to perform well (mostly cement). However, increasing the cement content is impractical and may result in greater hydration heat and drying shrinkage. This project studies the effect of limestone powder (LSP) on the fresh and hardened appearances of SCC. To evaluate the samples with and …
Published in International Journal of Geological and Geotechnical Engineering · Vol. 7, Issue 2, 2021 · pp. 17–23 Read article
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Predictive Evaluation of Erema Community Groundwater in Egi for the Purpose of Agricultural Use
Abstract: The investigation in this research is to study the developed sodium absorption ratio model for predicting and monitoring SAR concentration of Erema community groundwater by Ukpaka, 2016 given as, SAR = – + with coefficient of determination of that is modified in this research as + = 0 which is now the modified differential equation of sodium absorption ratio for Erema community it fitness in assessing SAR concentration. Validation of …
Published in International Journal of Water Resources Engineering · Vol. 3, Issue 2, 2017 · pp. 91–96 Read article
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The Phenomenon of Photoelectron trap by Thylakoids, Hemi, and semiconductornanoparticles for Photodynamic therapy
Abstract: This research presents an overview of the comparison of photoelectron trap by both organic and analytic nanoparticles. The phenomenon of photon absorption by organic matter typically chlorophyll pigment (Thylakoids), Heme, and semiconductor nanoparticles such ZnO, TiO2, -Fe2O3 is the focus of current research. The study presents a way of optimizing photoelectron absorption for the applications in Photodynamic therapy. This phenomenon is studied by determining extinction, absorption and scattering probabilities by …
Published in International Journal of Applied Nanotechnology · Vol. 9, Issue 2, 2023 · pp. 1–11 Read article
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Preparation and Evaluation of Plant-Based Coir Fiber-Reinforced Polypropylene Composites
Abstract: In the present article, unidirectional coir fiber (CF) and alkali-treated CF (ACF) were incorporated in polypropylene (PP) with and without 3-aminopropyl trimethoxy silane (AS) and tetramethoxy orthosilicate (TS) to produce composites by a compression molding technique. The basic properties of PP/CF composites (e.g. tensile strength, tensile modulus, impact strength, and water absorption) have enhanced with increasing CF content. The incorporation of AS and TS after alkali pretreatment for CF composites …
Published in International Journal of Polymer Science and Engineering · Vol. 7, Issue 2, 2021 · pp. 34–47 Read article