Publications by authors named "Wayan Darmawan"
Improving the durability of short-rotation wood can be achieved through chemical and thermal modification. Chemical and thermal modification can have an impact on the physicochemical properties of wood, which can affect wood's surface characteristics and its resistance to weathering. The purpose of this study was to investigate the surface characteristics and artificial weathering resistance of chemically and thermally modified short-rotation teak wood coated with linseed oil (LO)-, tung oil (TO)-, and commercial oil-based coatings consisting of a mixture of linseed oil and tung oil (LT) and commercial oil-based polyurethane resin (LB) coatings.
View Article and Find Full Text PDFFood security and environmental pollution are major concerns for the expanding world population, where farm animals are the largest source of dietary proteins and are responsible for producing anthropogenic gases, including methane, especially by cows. We sampled the fecal microbiomes of cows from varying environmental regions of Pakistan to determine the better-performing microbiomes for higher yields and lower methane emissions by applying the shotgun metagenomic approach. We selected managed dairy farms in the Chakwal, Salt Range, and Patoki regions of Pakistan, and also incorporated animals from local farmers.
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- The study focuses on improving the qualities of mangium wood, which grows rapidly in Indonesia, by using titanium dioxide (TiO) nanoparticles through an impregnation method.
- The researchers produced TiO nanoparticles via a hydrothermal method and tested how different concentrations (1% and 5%) impacted the wood's density and stability.
- Results showed that TiO nanoparticle treatment increased the wood's density, weight percent gain, and bulking effect while also enhancing its ability to degrade pollutants, offering better protection against UV radiation.
Jabon () is a fast-growing wood with low quality due to its low density and strength. The quality can be increased by modifying the wood through impregnation with various chemical compounds. In this study, jabon was impregnated with a solution of Fe and immersed in a strong base (NaOH) or a weak base (NHOH) to form magnetite (FeO) in-situ.
View Article and Find Full Text PDFNanosilica Synthesis from Betung Bamboo Sticks and Leaves by Ultrasonication.
Nanotechnol Sci Appl
December 2020
Introductions: Ultrasonication can be used to synthesize nanosilica from silica derived from betung bamboo sticks and leaves. This study aimed to synthesize nanosilica from betung bamboo sticks and leaves by the use of ultrasonication and to characterize the nanosilica produced.
Methods: The main materials used in this study were bamboo sticks and leaves.