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458 articles for “concentration”
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Study of Heavy Metal ion adsorption from Synthetic Wastewater with the help of biomass and analysis of Mathematical Model
Abstract: The biofilm matrix is a mixture of secreted polymers, metabolites and nutrients ingested, lysis solution products, and even particle debris. This matrix, which is polyanionic by nature, is essential for the activated carbon of metal cations. In this study, the heavy metal adsorption mechanism in biofilms is modelled in one spatial dimension. The numerical method is a free-boundary value issue for nonlinear parabolic and quadratic partial differential equations. Parabolic equations …
Published in International Journal of Polymer Science and Engineering · Vol. 8, Issue 1, 2022 · pp. 45–56 Read article
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Investigation the Potential of Sugarcane Bagasse for the Production of 5-HydroMethylFurfural
Abstract: The aim of this study was to invesigate the potential of sugarcane bagasse for 5-Hydroxymethylfurfural (5-HMF). Nowadays, food crops such as glucose and fructose were the main derived for the production of 5-HMF. The potential of sugarcane bagasse to replace the consumption of glucose and fructose was investigated through studies. Consequently, the primary aim of this research was to explore the feasibility of utilizing bagasse as a source for generating …
Published in International Journal of Polymer Science and Engineering · Vol. 9, Issue 2, 2023 · pp. 21–29 Read article
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Reviewing the Evolution of Nanotechnology in the Oil and Gas Sector: Focus on the Utilization of Silica Nanoparticles
Abstract: Nanotechnology is advancing notably in the oil and gas sector, with its applications demonstrating substantial progress. The use of nanoparticles in various aspects of the industry has shown promise in addressing challenges and improving efficiency. Nanotechnology is finding applications across multiple facets of the oil and gas industry, encompassing areas such as the development of drilling and hydraulic fracturing fluids, cementing for oil wells, improved oil recovery techniques, corrosion prevention, …
Published in International Journal of Polymer Science and Engineering · Vol. 9, Issue 2, 2023 · pp. 30–36 Read article
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Review Study on Experimental Investigation of Heat Transfer Using Al2O3 and CuO Nanoparticles with Water as Base Fluid Through Circular Tube of Heat Exchangers
Abstract: A colloidal mixture of nanometric particles (<100 nm) in a base liquid called nanofluid, which is the new generation of heat transfer fluid for various heat transfer applications where the transport characteristics are substantially higher than the base liquid. This review summarizes and analyzes the empirical correlations for the effective thermal conductivity and the dynamic viscosity of the nanofluid on the basis of experimental data and the theoretical model available …
Published in International Journal of Mechanics and Design · Vol. 3, Issue 2, 2017 · pp. 17–23 Read article
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Temperature-Dependent Acoustic and Thermodynamic Investigation of Molecular Interactions in the 1-Propanol–n-Hexane Binary Mixture
Abstract: The present study investigates the molecular interactions and thermophysical behavior of the binary mixture comprising 1-propanol and n-hexane over the temperature range of 288.15–318.15K. The experimental determination of density (ρ), viscosity (η), and ultrasonic velocity (u) was carried out over the entire composition range, and the measured data were utilized to evaluate several acoustical and thermodynamic parameters, including the Van der Waals constant, relaxation strength, acoustic impedance, Rao’s constant, Wada’s …
Published in International journal of Thermodynamics and Chemical Kinetics · Vol. 12, Issue 2, 2026 · pp. 16–33 Read article
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Tri-Route Orchestration of Sr-Modification, MoldVibration, and T6 Treatment on the Microstructure andPerformance of A356 Alloy
Abstract: This study examines the cascade effects of chemical modification, mechanical mold vibration during solidification, and subsequent T6 heat treatment on the microstructural evolution and multi-property enhancement of A356 Alloy cast via permanent mold casting. Initially Sodium (Na) modifying flux (2– 4 wt%) and Strontium (Sr) elemental modifier (0.01–0.05 wt%) were implemented to refine the morphology of eutectic silicon; Sr addition at an optimal concentration of 0.04 wt.% yielded superior eutectic …
Published in International Journal of Manufacturing and Materials Processing · Vol. 12, Issue 2, 2026 · pp. 13–25 Read article
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Spatial Variation and Pollution Assessment of Selected Water Quality Variables in the Luubara Creek, Niger Delta, Nigeria
Abstract: The spatial variation and pollution status of selected water quality variables in Luubara Creek, Niger Delta, Nigeria, were assessed between June and August 2024. Water samples were collected from four sampling stations, with Stations 1 and 2 representing areas of relatively low anthropogenic influence and Stations 3 and 4 representing areas with greater human activities. Physicochemical parameters and heavy metals were analyzed following the standard methods of the American Public …
Published in International Journal of Analytical and Applied Chemistry · Vol. 12, Issue 2, 2026 Read article
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Dynamic Matrix Control Versus Nonlinear ModelPredictive Control for the Van de Vusse ContinuousStirred-Tank Reactor: Diagnosing and Correcting aCost-Function Pathology That Masked NMPC’sTrue Performance
Abstract: The Van de Vusse reaction in a continuous stirred-tank reactor (CSTR) is a benchmark for nonlinear multivariable control, but its narrow operating envelope creates a trap for nonlinear model predictive control (NMPC): when the setpoint step is small relative to the plant’s reachable range, a standard quadratic NMPC cost function can make zero control action mathematically optimal, even with a perfect prediction model. This paper documents that failure mode, traces …
Published in International Journal of Chemical Separation Technology · Vol. 12, Issue 2, 2026 · pp. 55–66 Read article
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Heat Generated Simulation with Bacteria and Fungi inCrude Oil Remediation in an Aerated Lagoon
Abstract: Studies on the heat generated by bacteria and fungi in an aerated lagoon were monitored by theapplication of MATLAB computed software simulation. Mathematical models were developed in termsof substrate utilization by microbes and correlated with the Monod’s equation model which revealedthe trend of heat generated at different operating temperature of 15°C, 30°C, 45°C, 60°C, 75°C, 90°C,105°C and 120°C. The heat generated varies with increase in the microbial concentration as favoredby …
Published in International journal of Thermodynamics and Chemical Kinetics · Vol. 12, Issue 1, 2026 · pp. 27–45 Read article
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Establishment of a Sensitive LC-MS Method for Pharmacokinetic Evaluation of Decitabine and Cedazuridie in Rat Plasma
Abstract: A simple, rapid, and highly sensitive liquid chromatography–mass spectrometry (LC–MS) method was successfully developed and validated for the simultaneous determination of Decitabine and Cedazuridine in plasma matrices. The method demonstrated excellent linearity across the selected calibration range, with correlation coefficients (R²) consistently exceeding 0.999 for both analytes, indicating strong analytical performance. Method validation was carried out in accordance with ICH Q2(R2) and US FDA bioanalytical method validation guidelines, ensuring compliance …
Published in International Journal of Green Chemistry · Vol. 12, Issue 1, 2026 · pp. 34–42 Read article
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Total Petroleum Hydrocarbon Degradation with the Action of Bio-stimulant using NPK Fertilizer
Abstract: The total petroleum hydrocarbon degradation with the action of bio-stimulant using NPK fertilizer was monitored with respect to different concentration of dosages. The nature of the curve in relationship to the establishment of the equation of the line as well as the square root of the best of each line or curve was considered. The application of this concept enhanced the determination of the kinetic values of each bioreactor process, …
Published in International Journal of Green Chemistry · Vol. 12, Issue 1, 2026 · pp. 26–33 Read article
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Evolution of Mobile Wireless Generations and the Architectural Foundations of AI-Integrated 6G Networks
Abstract: Wireless communication has moved through five complete technology generations in roughly four decades, and each transition has reshaped how societies exchange information, run businesses, and design cities. This paper is the first instalment of a two-part review and concentrates on the historical arc of that journey, tracing the defining traits, benefits, and shortcomings of 1G through 5G before turning to the architectural groundwork on which sixth-generation (6G) networks are being …
Published in International Journal of Digital Communication and Analog Signals · Vol. 12, Issue 2, 2026 Read article
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Evaluation of Coconut Coir Feasibility as Fluid Loss Control Material in Comparison with Commonly Used NUTPLUG
Abstract: This work centers on decreasing drilling fluid loss circulation by using coconut coir as a loss circulation material. Millions of dollars are invested yearly to counteract lost circulation and its consequences, including clogged pipes, blowouts, and abandoned wells. Drilling mud was formulated with varied percentages of coconut coir and nut plugs, which were utilized as loss circulation materials to minimize or decrease drilling fluid loss. The two materials being compared …
Published in International Journal of Chemical Engineering and Processing · Vol. 12, Issue 2, 2026 · pp. 20–36 Read article
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INFLUENCE OF CONSTANT AND VARIABLE PASTERNAK FOUNDATIONS ON DAMPED SIMPLY SUPPORTED BERNOULLI-EULER BEAM UNDER MOVING LOADS
Abstract: This study presents an analytical investigation of the dynamic behavior of a simply supported uniform Bernoulli-Euler beam resting on both constant and variable Pasternak foundations subjected to concentrated moving load with damping. The governing equations of motion were formulated by incorporating the effects of foundation stiffness, shear interaction, damping, and load inertia. Analytical solutions were obtained for both moving-force and moving-mass problems. For the constant foundation case, the Generalized Finite …
Published in International Journal of Mechanics and Design · Vol. 12, Issue 1, 2026 · pp. 13–29 Read article
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Establishment of a Sensitive LC-MS Method for Pharmacokinetic Evaluation of Decitabine and Cedazuridie in Rat Plasma
Abstract: Abstract A simple, rapid, and highly sensitive liquid chromatography–mass spectrometry (LC–MS) method was successfully developed and validated for the simultaneous determination of Decitabine and Cedazuridine in plasma matrices. The method demonstrated excellent linearity across the selected calibration range, with correlation coefficients (R²) consistently exceeding 0.999 for both analytes, indicating strong analytical performance. Method validation was carried out in accordance with ICH Q2(R2) and US FDA bioanalytical method validation guidelines, ensuring …
Published in International Journal of Green Chemistry · Vol. 12, Issue 1, 2026 · pp. 34–42 Read article
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Chemical Processing in the E-Kidney Filtration Revolution
Abstract: The convergence of bioengineering and advanced materials science has catalyzed groundbreaking innovations in renal replacement therapies, most notably in the development of the electronic kidney (e-kidney). Central to the functionality of this compact, wearable filtration system is the integration of in situ chemical processing mechanisms that emulate the nuanced biochemical regulation of the human nephron. Unlike conventional dialysis, which relies on passive diffusion and ultrafiltration, the e-kidney employs microfluidic arrays …
Published in International Journal of Chemical Engineering and Processing · Vol. 12, Issue 1, 2026 · pp. 1–6 Read article
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A Comprehensive Review of Convolutional Neural Network Architectures and Evolution
Abstract: Convolutional Neural Networks (CNNs) have become a foundational deep learning framework in computer vision because they can automatically extract layered, increasingly complex features directly from raw image data. CNNs use convolutional, pooling, and activation layers to extract spatial patterns from basic edges to intricate object components, drawing inspiration from the human visual cortex. An overview of CNNs’ basic architecture is given in this study, along with an explanation of important …
Published in International Journal of Image Processing and Pattern Recognition · Vol. 12, Issue 1, 2026 · pp. 32–40 Read article
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Chemical Synthesis, Structural Characterization and Solid-State Chemistry of NiₓCo₁₋ₓFe₂O₄ Ferrite Oxides
Abstract: Ferrite materials have attracted significant attention in recent decades due to their remarkable magnetic, electrical, and catalytic properties. Spinel ferrites, generally represented by the formula MFe₂O₄ (where M denotes a divalent metal ion such as Ni²⁺ or Co²⁺), have attracted significant attention due to their versatile applications in areas including magnetic storage, microwave absorption, sensing technologies, transformers, and catalysis. . In particular, nickel–cobalt mixed ferrites (NiₓCo₁₋ₓFe₂O₄) are of considerable interest …
Published in International Journal of Chemical Synthesis and Chemical Reactions · Vol. 12, Issue 1, 2026 · pp. 1–9 Read article
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Recent Advances in Analytical and Applied Chemistry: A Comprehensive Review
Abstract: Analytical and Applied Chemistry form the backbone of modern scientific progress, connecting fundamental molecular insights with real-world industrial and societal applications. Over the past decade, these fields have undergone significant transformation, driven by the need for sustainability, precision, and efficiency. This review highlights key advancements in green analytical chemistry (GAC), high-resolution mass spectrometry (HRMS), and the incorporation of nanotechnology into chemical sensing, while also examining their broader implications in applied …
Published in International Journal of Analytical and Applied Chemistry · Vol. 12, Issue 1, 2026 · pp. 36–41 Read article
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Effect of Nano-Fillers on the Mechanical and Fracture Behavior of Polymer Composite Matrices: A Review
Abstract: The modification of polymer composite matrices through the incorporation of nano-scale fillers has become a prominent and highly effective strategy for enhancing mechanical performance, stiffness, and fracture resistance. Unlike conventional micro-scale reinforcements, nano-fillers possess exceptionally high surface area–to–volume ratios and unique physicochemical characteristics that significantly influence interfacial phenomena within the polymer matrix. Materials, such as carbon nanotubes (CNTs), graphene nanoplatelets (GNPs), nano-silica, and layered silicate nanoclays, introduce advanced toughening mechanisms …
Published in International Journal of Composite Materials and Matrices · Vol. 12, Issue 1, 2026 · pp. 31–36 Read article