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164 articles for “Alkali”
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Seroprevalence of Hepatitis E Virus and Serum Level of Serum Aspartate Transaminase (AST) and Alkaline Phosphatase (ALP) Among Jaundice Patients in Kathmandu Valley, Nepal
Abstract: Hepatitis E is an acute disease caused by hepatitis E virus that usually manifest as acute jaundice. It is a waterborne infection and occurs sporadically or as epidemic outbreaks. Hepatitis E virus (HEV) is a positive-stranded RNA virus with a 7.2 kb genome with three open reading frames In this study we report the seroprevalence of HEV in different categories of jaundice patients along with their elevation of serum bilirubin, …
Published in Research and Reviews: A Journal of Medicine · Vol. 4, Issue 3, 2014 · pp. 37–42 Read article
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Corrosion inhibitors of steel applicable by green but toxics
Abstract: Inhibitors in detergent and alkali based chemicals are used in various media for steels. Toxicity has induced pharmaceutical compounds as better inhibitors to restrict pollutant gases emissions after reaction with alkaline inhibitors. Green in origin inhibitors are toxin free to use with detergents for inhibition of both pollutant gases and corrosion of processing machineries made of metals. Eco-friendly inhibitors have appeared for steel corrosion being embedded in concrete i.e. alkaline …
Published in Journal of Thin Films, Coating Science Technology & Application · Vol. 6, Issue 2, 2019 · pp. 38–47 Read article
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Aluminum and its Alloys to Recover from Corrosive Weather
Abstract: Corrosion is defined as deterioration of material, usually metal, because of reaction with its environment and which requires presence of an anode, a cathode, an electrolyte and an electrical circuit. Aluminum and its alloys are reactive to weather of exposure, e.g. ambient, acid and alkalis. Solid to pigments are prevented from corrosion by using inhibitors. Organic inhibitors are ever praised due to non-toxic performances. Basic processes are surface adsorption to …
Published in Emerging Trends in Chemical Engineering · Vol. 6, Issue 2, 2019 · pp. 7–19 Read article
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Improving the Mechanical and Interfacial Properties of Bhendi Fiber via Chemical Surface Treatments
Abstract: Because of its primary benefits—moderate strength and stiffness, low cost, and being a renewable, degradable, and ecologically friendly material—natural fibers are believed to have potential use as reinforcing agents in polymer composite materials. Due to their inherent hydrophilicity, they have a tendency to retain moisture, which can impair or soften the fibers' adhesion to the surrounding matrix. This can have an impact on the performance of composite materials used in …
Published in International Journal of Advance in Molecular Engineering · Vol. 3, Issue 1, 2025 · pp. 22–32 Read article
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Geopolymerization: A Review on Physico-chemical Factors Influence to the Reaction Process
Abstract: A geopolymer is one of materials belonging to an inorganic polymer group based on alumino-silicate structural networks. The material is a product of reactions among the activated alumino silicate resources and solutions of alkaline activators in various conditions. There have been many investigations conducted to produce geopolymer using different raw materials and methods. The chemical factors have a decisive role in the reaction process and the formation of the geopolymeric …
Published in Journal of Polymer & Composites · Vol. 8, Issue 3, 2020 · pp. 1–9 Read article
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Chaya Plant Extract Jatropha tanjorensis: The Concepts of Bioremediation of Contaminated Soil Evaluation
Abstract: This research was carried out to study the performance of sun-dried and room dried Chaya plant extract on the remediation of crude oil contaminated soil samples from Obele Community. The parameters under investigation were Total Petroleum Hydrocarbon degraded((TPHD), pH, amount of Nitrogen, Phosphate, and Potassium, Total organic carbon. Twenty-two (22) batch reactors were used for this research with each reactor containing 1kg of soils samples contaminated with 100ml of crude …
Published in International Journal of Advance in Molecular Engineering · Vol. 1, Issue 1, 2023 · pp. 31–48 Read article
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Experimental Investigation of Effect of Temperature and Molarity on Compressive Strength of Geopolymer Concrete
Abstract: Geopolymer concrete is a relatively new development in the field of concrete, in which regular Portlandcement is completely replaced with pozzolanic material such as fly ash, which is then activated by astrongly alkaline solution to function as a binder in the mix. As a result, we must manufactureenvironmentally friendly concrete to address issues such as global warming and CO2 emissions intothe atmosphere generated by standard Portland cement production. An experimental …
Published in Journal of Experimental & Applied Mechanics · Vol. 12, Issue 3, 2021 · pp. 34–39 Read article
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The Role of Surface Treatments on Mechanical and Interfacial Shear Strength of Pineapple Leaf Fibers
Abstract: Natural fibers are seen as having potential application as reinforcing agents in polymer composite materials due to their main advantages, which include moderate strength and stiffness, low cost, and being an environmentally beneficial, degradable, and renewable material. They are susceptible to absorbing moisture because of their innate hydrophilicity, which can weaken or plasticize the adherence of the fibers to the surrounding matrix and impact the performance of composite materials employed …
Published in Journal of Materials & Metallurgical Engineering · Vol. 12, Issue 3, 2022 · pp. 18–28 Read article
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An Experimental study on Strength parameters of OPC, PPC and Geopolymer Mortars
Abstract: Geopolymer mortar is a new trend in mortars, manufactured with fine aggregate and geopolymers like fly ash and silica fume, which gets activated by alkaline solutions like sodium silicate solutions. Research work on geopolymer based mortars is attaining more scope in present era because of its sustainable properties and easy availability. The study, includes to evaluate the strength in compression and bond strengths of different mortars in different curing methods, …
Published in Journal of Structural Engineering and Management · Vol. 9, Issue 3, 2022 · pp. 21–27 Read article
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ISOLATION OF CELLULOSIC NANOPARTICLES FROM COIR FIBRE FOR THE PREPARATION OF NATURAL RUBBER COMPOSITES
Abstract: Coir fibre and natural rubber are renewable and sustainable agro-resources that can be harnessed for the production of finished rubber articles on industrial scale. In this research, coir fibres extracted from coconut husk were subjected to alkaline-peroxide delignification. The delignified fibres were further transformed into coir fibre cellulosic nanoparticles (CFNP) with particle size distribution of 68–311 nm and a polydispersity index (PDI) of 0.371 through friction homogenization. These particles were …
Published in Journal of Polymer & Composites · Vol. 6, Issue 1, 2018 · pp. 9–16 Read article
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Evaluation of Anti-Oxidant Properties of Lemon Grass Essential Oil in Inhibiting Corrosion of Mild Steel
Abstract: Lemon grass (Cymbopogon citratus) essential oil was extracted by hydrodistillation method, using all glass Clevenger apparatus. The essential oil obtained was used as inhibitor (anti-oxidant) to inhibit the corrosion of mild steel in acid and alkaline media. Samples of mild steel were exposed to acid and alkaline media in the absence of inhibitor and their corrosion rates were evaluated. Subsequently, other samples of the same mild steel were exposed to …
Published in Journal of Thin Films, Coating Science Technology & Application · Vol. 3, Issue 1, 2016 · pp. 36–41 Read article
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Fabrication and drilling characterization of Hemp & Grewia-Optiva hybrid composite and comparison with ANN model
Abstract: In recent days the use of natural fibers has increased over synthetic fibers due to various advantages. The alkali treatment for these natural fibers further improves the adhesion between fiber and matrix and greatly enhances the mechanical properties of the composite. The present study involves the fabrication of a hybrid composite using the alkali-treated (5% NaOH concentration) natural fibers – Hemp &Grewia-optiva as reinforcement material and epoxy as a matrix …
Published in Journal of Polymer & Composites · Vol. 12, Issue 3, 2024 · pp. 138–146 Read article
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Use of Geopolymer Composites for Controlling Structural Cracks
Abstract: A building’s safety and stability can be compromised by ignoring the potential structural issues indicated by occurring cracks in buildings. Extensive damage may cause over the period from unidentified cracks.Good quality concrete never cracks in normal service conditions unless high horizontal force is applied. Through the cracks, carbon dioxide is released into the concrete and speeds up carbonation throughout the cracks, thus reducing the structure usage. The materials which are …
Published in Journal of Polymer & Composites · Vol. 12, Issue 6, 2024 · pp. 172–184 Read article
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Chemical Modifications and Tensile Properties of Areca Leaf Sheath Fiber Reinforced Polymer Composites: A Comprehensive Review
Abstract: Areca leaf sheath (ALS) fiber is a promising eco-friendly material, offering a sustainable, lightweight, and cost-effective alternative for low-strength applications. Its natural biodegradability aligns well with the growing global demand for environmentally responsible materials. This review explores the transformative effects of chemical treatments, such as alkali, silane, and benzoylation, on the tensile properties of Areca leaf sheath fibers. Among these, alkali treatment consistently demonstrates the most significant improvement in tensile …
Published in Journal of Polymer & Composites · Vol. 13, Issue 5, 2025 · pp. 94–106 Read article
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Development and Characterization of Bottom Ash–Fly Ash–GGBS-Based Geopolymer Composites for Sustainable Applications
Abstract: The growing demand for sustainable construction materials has spotlighted geopolymer concrete (GPC) as an environmentally viable substitute for conventional cement-based systems. This study presents an innovative dual-waste valorization approach, integrating pulverized bottom ash (BA) and ground granulated blast furnace slag (GGBS) as binders while replacing sodium silicate (Na₂SiO₃) in the alkaline activator with treated textile effluent. Unlike prior works that focus solely on solid waste incorporation, this research pioneers the …
Published in Journal of Polymer & Composites · Vol. 13, Issue 6, 2025 · pp. 32–42 Read article
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Effect of NaOH & Na2Sio3 on GGBS based Geopolymer Concrete
Abstract: This paper presents the experimental studies on the performance of comparison made by making Geopolymer Concrete (GPC) based on Ground Granulated Blast furnace slag (GGBS),using sodium hydroxide (NaOH )and sodium silicate (Na2Sio3) as alkaline activator. This study has proved that the by-product from iron industries, has the potential to produce cement free concrete, commonly known as Geopolymer concrete (GPC), blast furnace slag is gaining attention to be used as a …
Published in Journal of Construction Engineering, Technology & Management · Vol. 10, Issue 3, 2020 · pp. 21–45 Read article
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Development of High-Strength Geopolymer Concrete
Abstract: Pollution in cement production is a major environmental issue throughout the world. Geopolymer concrete is an alternate cement as well as environment-friendly material in construction field. It is also used as an alternative for ordinary Portland cement because of no emission of greenhouse gas CO2. The current limitation in geopolymer concrete has been applied in precast members. The geopolymer concrete is prepared by using fly ash, ground granulated blast furnace …
Published in Journal of Construction Engineering, Technology & Management · Vol. 4, Issue 1, 2014 · pp. 8–13 Read article
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Surface Modified Abaca Fibers: Physico-Mechanical, Morphological and Degradation Properties Evaluation
Abstract: Lignocellulosic fibers are used as cost-cutting fillers in plastics factories. Amid several factors, the ultimate performance of composite ingredients depends on the bond between the matrix resin and the filler, and hence on the quality of the interface. To acquire optimal performance of the end product, adequate interaction between the matrix and the lignocellulosic ingredient is preferred. This is often acquired through surface modification of the matrix or filler. Abaca …
Published in Journal of Materials & Metallurgical Engineering · Vol. 12, Issue 2, 2022 · pp. 34–46 Read article
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Effect of Fiber Addition in Geopolymer Concrete: A Study on Comparison betweenNatural and Artificial Fibers
Abstract: Geopolymer concrete is an inorganic polymer concrete, containing no ordinary Portland cement (OPC). It is produced by reacting alumino-silicate source material with alkaline solution. Geopolymer concrete has highly desirable structural engineering properties, which can lead to significant environmental and economic benefits. Fibers in general and polypropylene (PP) fibers in particular have gained popularity in recent years for use in concrete, mainly owing to their low price and excellent characteristics. Alkalineliquids …
Published in Journal of Structural Engineering and Management · Vol. 2, Issue 1, 2015 · pp. 18–24 Read article
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Agro- residue Pretreatment Tools and Techniques: A Detailed review
Abstract: This review examines the significance of biomass pre-treatment in facilitating efficient biofuel production from lignocellulosic materials. Different methods of pre-treatment, such as acid, alkaline, liquid hot water, ionic liquids, organosolv, ozonolysis, wet oxidation, steam explosion, ammonia fiber explosion (AFEX), carbon dioxide explosion, and biological pretreatment, are examined in terms of their underlying principles, benefits, and drawbacks. Acid pretreatment effectively hydrolyzes hemicellulose but suffers from equipment corrosion and high operational costs, …
Published in Research & Reviews : Journal of Botany · Vol. 13, Issue 1, 2024 · pp. 22–31 Read article