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458 articles for “concentration”
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Synthesis and Evaluation of Antifungal Properties of 2-((4-((6phenylimidazo[2,1-b][1,3,4]thiadiazole-2-yl)methoxy)phenoxy)methyl)-6-phenylimidazo[2,1-b][1,3,4] thiadiazole Derived from Hydroquinone
Abstract: Thiadiazole, a heterocyclic core, has garnered significant interest from chemists seeking novel therapeutic agents. The synthetic route for the target compounds is depicted in Scheme 1. The compounds were synthesized with favorable yields through the condensation of hydroquinone with various organic reagents. They underwent physical characterization and were analyzed using spectroscopic methods, including infrared (FTIR) and NMR (1H, 13C) spectroscopy. The FT-IR spectrum of the product exhibited a ν(C=N) absorption …
Published in International Journal of Environmental Chemistry · Vol. 12, Issue 1, 2026 · pp. 76–82 Read article
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Nanotechnology-Enabled Non-Invasive Teeth Whitening: Safety, Efficacy, and Regulatory Perspectives with a Focus on India, Asia, and Developed Countries
Abstract: Demand for tooth whitening is growing worldwide, but conventional peroxide-based bleaching is associated with dentin hypersensitivity, enamel softening, and soft tissue irritation, especially under repeated or high-concentration use. Nanotechnology offers a new class of non-invasive whitening strategies that aim to combine esthetic improvement with enamel protection and remineralization. Among these, nanohydroxyapatite (nanoHAP) toothpastes and gels have the most advanced evidence base; in vitro and in situ studies indicate that nanoHAP …
Published in International Journal of Nanomaterials and Nanostructures · Vol. 12, Issue 1, 2026 Read article
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Nanotechnology-Enabled Non-Invasive Teeth Whitening: Safety,Efficacy, and Regulatory Perspectives with a Focus on India, Asia, and Developed Countries
Abstract: Demand for tooth whitening is growing worldwide, but conventional peroxide-based bleaching is associated with dentin hypersensitivity, enamel softening, and softtissue irritation, especially under repeated or high-concentration use. Nanotechnology offers a new class of non-invasive whitening strategies that aim to combine esthetic improvement with enamel protection and remineralization. Among these, nanohydroxyapatite (nanoHAP) toothpastes and gels have the most advanced evidence base; in vitro and in situ studies indicate that nanoHAP deposits …
Published in International Journal of Nanomaterials and Nanostructures · Vol. 12, Issue 1, 2026 Read article
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Study of the Effect of SLS Loading on the One-Pot Synthesis of Substituted Piperidines
Abstract: Piperidine derivatives represent a vital class of nitrogen-containing heterocycles with extensive pharmacological and industrial significance. Their synthesis has garnered considerable interest due to their presence in numerous bioactive molecules, including drugs with CNS activity, analgesic properties, and antimicrobial effects. Traditional multi-step synthetic pathways are often time-consuming and resource-intensive. To address this, one-pot multicomponent reactions (MCRs) have emerged as an efficient and eco-friendly alternative, allowing for the rapid construction of complex …
Published in International Journal of Green Chemistry · Vol. 12, Issue 1, 2026 · pp. 1–9 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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A Comparative Study of Seasonal Variability and Photocatalytic Impact on Water Quality of the Ayad River, Rajasthan
Abstract: This study examines seasonal fluctuation in Ayad River water quality, Rajasthan, India and compares the performance of titanium dioxide (TiO2)-mediated photocatalytic treatment under natural sunlight irradiance. Ayad River is a critical source of freshwater for domestic, agricultural and environmental purposes, which is increasingly stressed by urban runoff, industrial effluent and seasonality. As a follow-up to the above, water samples of four important water sources- Thurmadar, Subhas Nagar Bridge (Ayad), Kanpur …
Published in International Journal of Green Chemistry · Vol. 11, Issue 2, 2025 · pp. 1–17 Read article
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EFFECTIVE USE OF ADSORPTION TECHNIQUE FOR REMOVAL OF HEAVY METALS FROM WATER A Review
Abstract: Abstract- Presence heavy metals are not acceptable in water so, this study presents removal of heavy metals from water with the use of different adsorbents, particularly agricultural waste materials. This is to develop effective and economical water treatment solutions. The hazardous effects of presence of heavy metal in water causes great risks to source of water and health issues to human. In regions like Bhandara and Ambazari Lake in Nagpur, …
Published in International Journal of Water Resources Engineering · Vol. 11, Issue 2, 2025 · pp. 7–13 Read article
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Study of Corrosion and Corrosion Protection of Rebar Steel in Saline water
Abstract: Corrosion is major problem with metals. When they come in contact of surrounding corrosive medium to construct a corrosion cell on their interface, metals undergo in corrosion reactions. Such environments metals can be exhibited uniform, galvanic, pitting, stress, crevice, embrittlement, intergranular corrosion etc. The corrosion of phenomenon of rebar steel studied in saline water. It creates corrosive medium for rebar steel due to availability of chloride ions. Rebar steel is …
Published in International Journal of Metallurgy and Alloys · Vol. 11, Issue 2, 2025 · pp. 1–11 Read article
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Screening the Effects of Asphalt Plant Discharge Water on Germination Indices of Some Edible Vegetables
Abstract: The study aims to determine the effects of asphalt plant discharge water containing different compounds of polycyclic aromatic hydrocarbons on germination parameters of viable seeds of Telfairia occidentalis Hook. F, Corchorus olitorius and Solanum macrocarpon L. in a screen house. The experiment was laid out in a completely randomized design with five replicates. A 300 ml of asphalt plant discharge water obtained from the three different locations (T2, T3, and …
Published in International Journal of Environmental Chemistry · Vol. 11, Issue 2, 2025 · pp. 22–35 Read article
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Implications of Asphalt Plant Discharge Water on Agromorphological Parameters and Photosynthetic Processes of Edible Vegetables
Abstract: Untreated industrial waste discharges emitted into the environment have a negative impact on all components of the ecosystem, especially the soil properties. The aim of the study is to evaluate the effects of heavy metal concentrations present in asphalt plant discharges on the soil properties, photosynthetic activities and agromorphology of the vegetable plants. Soil samples used for the experiment were collected from Federal University of Technology Owerri Botanical Garden. The …
Published in International Journal of Agrochemistry · Vol. 11, Issue 2, 2025 Read article
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Performance and Emission Analysis of Water HyacinthBiodiesel with TiO2 Nano-Additives Over Diesel Engine
Abstract: AbstractThis research work is related to performance and emissions analysis of diesel in combination with thewater hyacinth biodiesel with TiO2 as a nano-additive. This study also proposes water hyacinthbiodiesel (WHB) as a possible alternative energy source because the species is extensively dispersed infreshwater, marine, and aquatic ecosystems worldwide. Investigation is performed comparing TiO2nano-additive blended with water hyacinth biodiesel and diesel at various engine loads. WHB wasmixed with petroleum diesel fuel …
Published in International Journal of I.C. Engines and Gas Turbines · Vol. 11, Issue 1, 2025 · pp. 26–37 Read article
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TPH Degradation through Bioremediation Using Organic Amendments
Abstract: This study investigates the effectiveness of bioremediation in crude oil-contaminated soils from the Niger Delta region of Nigeria, an area that has long suffered environmental degradation due to recurrent petroleum exploration and oil spills. The research emphasizes the degradation of Total Petroleum Hydrocarbons (TPH) in two distinct soil types – swampy and clay soils – while assessing the influence of various organic and inorganic amendments. Organic amendments, specifically Moringa seed …
Published in International Journal of Analytical and Applied Chemistry · Vol. 11, Issue 2, 2025 · pp. 40–45 Read article
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Optimizing Acoustics in Open-Plan Office Buildings: An Architect’s Perspective
Abstract: This study examines open-plan workspaces and the acoustic issues that are common in high-rise office buildings. These settings frequently find it difficult to strike a balance between addressing the need for privacy encouraging collaboration and maintaining acoustic comfort in common areas. The study evaluates the effects of major noise sources on employee productivity, focus, and general well-being. These sources include office equipment, conversations, and insufficient acoustical privacy. Considering the growing …
Published in International Journal of Sustainable Building Technology · Vol. 8, Issue 1, 2025 · pp. 102–110 Read article
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Integrated Process Design and Simulation of Amine-Based CO₂ Capture: A Path to Emission Control
Abstract: The flow sheet must represent the complete process in detail taking care of all process equipment. ASPEN HYSYS simulation software was used to simulate the process, the models of the process was simulated using MATLAB. The concentration of the atmospheric CO 2 was found to having been increasing steadily and has risen up to 35% since the Industrial Revolution. This rate, at which the concentration of CO 2 is increasing, …
Published in International journal of Thermodynamics and Chemical Kinetics · Vol. 11, Issue 2, 2025 Read article
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Utilization and Mitigation of Ventilation Air Methane in Coal Mining: A Focus on Turkey
Abstract: Ventilation Air Methane (VAM), a byproduct of underground coal mining, is a significant source of methane emissions and a potential energy resource. VAM is typically released at low concentrations, ranging from 0.1% to 1.5%, making it challenging to capture and utilize effectively. This article explores methane enrichment technologies, focusing on the weak eddy and free diffusion methods to increase VAM concentrations. These techniques have shown promise in enhancing methane capture …
Published in International Journal of Chemical Separation Technology · Vol. 11, Issue 1, 2025 Read article
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Lead (II) Ion Biosorption from Aqueous Solution ontoHexadecyltriammonium Bromide (HDTMA-Br) Modified Dry Water Hyacinth
Abstract: Heavy metal release into the environment by industrial activities has become a persistent problem,with these contaminants continually increasing in concentration. Heavy metals not only circulatethrough ecosystems but also accumulate in organisms over time, which elevates their toxic effectsalong the food chain. This research was conducted to explore the efficiency of biosorption inremoving lead (II) ions from aqueous solutions using water hyacinth powder modified withhexadecyltriammonium bromide (HDTMA-Br), a cationic surfactant. The …
Published in International Journal of Chemical Synthesis and Chemical Reactions · Vol. 10, Issue 2, 2025 Read article
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Development of Nanocomposites for Sensor Applications
Abstract: The development of nanocomposites for sensor applications represents a significant breakthrough in materials science and engineering, driven by the unique properties of nanomaterials. Nanocomposites, which combine nanoparticles with polymers or other matrices, exhibit enhanced mechanical, electrical, and thermal properties, making them highly suitable for various sensing applications. The integration of nanoparticles, such as metal oxide, carbon nanotubes, and graphene, into a composite framework can dramatically increase sensitivity and selectivity, enabling …
Published in International Journal of Applied Nanotechnology · Vol. 11, Issue 1, 2025 · pp. 18–37 Read article
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Treatment of CO2+NH3 Mixed Waste Gas from Different Sources by Blend Solvents
Abstract: The waste gas from chemical plants, including urea fertilizer plant, contains a large amount of CO2 gas in addition to NH3 gas. New solvents have been studied for use in the absorption of waste gases, but most of them are carried out at specific compositions and flow rates for individual gases. In this paper, a complete conceptual design of the process for separately absorbing CO2 and NH3 gases in a …
Published in International Journal of Chemical Separation Technology · Vol. 10, Issue 2, 2024 · pp. 1–19 Read article
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Investigation on the Characteristics of Chromolaena Odorata (Awolowo leaf) in Petroleum Hydrocarbon Degradation in Loamy Soil Environment
Abstract: The application of Chromolaena odorata (Awolowo leaf), processed into powder form, was used as a biostimulant for petroleum hydrocarbon degradation and mitigation in a loamy soil environment. In this investigation, the physicochemical and microbial characteristics of the sample were determined, as presented in this research, including pH, electrical conductivity (EC), total nitrogen (T.N), total phosphorus (T.P), potassium (K), total organic carbon, and P. fluorescence. Corynebacterium sp., Arthrobacter, Bacillus, Acinetobacter iwoffi, …
Published in International journal of Thermodynamics and Chemical Kinetics · Vol. 10, Issue 1, 2024 · pp. 13–23 Read article
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Analyzing Atmospheric Particulate Matter in PortHarcourt and Omoku, Nigeria, Using Artificial NeuralNetworks and Fuzzy Logic
Abstract: Port Harcourt and Omoku, two densely populated towns in Rivers State, Nigeria, are hubs of industrial, commercial, and residential activities, characterized by the presence of oil and gas industries, educational institutions, large markets, and, in the case of Omoku, access to free electric power supply. These activities contribute to environmental degradation through industrial effluents, domestic waste, automobile emissions, gas flaring, and biomass burning, which release aerosols that form harmful particulates …
Published in International Journal of Chemical Engineering and Processing · Vol. 10, Issue 2, 2024 · pp. 16–52 Read article