Use of natural source

This paper aims to study the effect of coal bottom ash (CBA) as a fine aggregate substitution at high levels on the mechanical properties and microstructure characteristics of concrete. CBA that sourced from a local coal-fired power plant in Vietnam was used to replace the natural sand (NS) in the concrete mixtures at different levels of 0, 30, 50, 70, and 100%.

7p vimitsuki 06-05-2025 1 1   Download

Self-healing vulcanized natural rubber (V-NR) was prepared with MgO/ZnO as a binary activator system in the study. Standard Vietnam Rubber Grade 3L (SVR3L) was used as NR source. The SVR3L was vulcanized with ZnO, MgO/ZnO, or MgO as activators and other vulcanizing reagents.

9p visarada 28-04-2025 1 1   Download

Shampoo is a necessary hair care item for every person's everyday routine. The quest for environmentally friendly and naturally sourced products has led to an investigation into the production of synthetic shampoos using natural components such as fabaceae fruit, pomelo peel, and lime peel.

7p viyamanaka 06-02-2025 3 1   Download

Avocado peel has been considered as a potential source of natural antioxidants in which phenolics are among the most important compounds. Therefore, this study aims to optimize the extraction process of phenolics using response surface methodology and evaluate the corresponding antioxidant activity.

11p viuchiha 03-01-2025 6 2   Download

Natural resources are being consumed at an alarming rate, and the capacity of resources and technologies to satisfy food demand for the growing population remains uncertain. Since agriculture along with its allied sector, is the largest source of livelihood in India having 70% of rural household depending on agriculture as their primary occupation of which 82 % of farmers are small and marginal (FAO, 2019), the use of non monetory inputs by the poor farmers can be quite the most feasible, eco-friendly and climate smart option to preserve the environment and safeguard the natural resources.

11p angicungduoc6 22-07-2020 16 4   Download

The challenge of climate change results primarily from the global use of fossil fuel. Renewable energy as alternative energy source allows the use of natural sources such as micro-hydro, wind; solar, and biomass that are sustainable to be explored.

9p lucastanguyen 01-06-2020 37 3   Download

Characteristic cohomology classes, defined in modulo 2 coefficients by Stiefel [26] and Whitney [28] and with integral coefficients by Pontrjagin [24], make up the primary source of first-order invariants of smooth manifolds. When their utility was first recognized, it became an obvious goal to study the ways in which they admitted extensions to other categories, such as the categories of topological or PL manifolds; perhaps a clean description of characteristic classes for simplicial complexes could even give useful computational techniques.

25p tuanloccuoi 04-01-2013 65 7   Download