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All Journal The Indonesian Biomedical Journal Metal Indonesia ETHOS: Jurnal Penelitian dan Pengabdian kepada Masyarakat
Ekavianty Prajatelistia
Faculty Of Mechanical And Aerospace Engineering, Bandung Institute Of Technology, Jl. Ganesha No.10, Bandung, 40132
Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering Engineering Materials Science & Nanotechnology Mechanical Engineering Public Health

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Surfaces Casting Defect Analysis and its Countermeasures on Products Manufactured by Alkali-Phenolic Binder Sand Molding Husen Taufiq; Aditianto Ramelan; Ekavianty Prajatelistia; Susana Susana; Muhammad Fathurrohman
Jurnal Metal Indonesia Vol 44, No 1 (2022): Metal Indonesia
Publisher : Balai Besar Logam dan Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32423/jmi.2022.v44.35-41

Abstract

This paper presents the results of the analysis of surface casting defects and their countermeasures. To find out the root causes of defects, and their mechanisms. Product casting defects have been characterized by visual inspection and SEM/EDX, also collecting production data information. Studied relation between the composition of molding sand and the mechanical properties of compressive strength and surface stability index has been done. The visual inspection results, field data collection, and SEM/EDX analysis showed a rough product surface and the presence of SiO2 inclusions. The product has been made with an alkaline phenolic mold using reclaimed sand with a compressive strength of 18 kg/cm2. The study results show that with increasing binder levels, there is an increase in the mechanical properties of compressive strength and surface stability index. They were based on the experimental results of the test block product casting with improved mechanical properties above. Obtained a much better surface of the casting product, and relatively no surface inclusion defects were found. The above experiment shows that the surface stability index is an important parameter the critical value is 90%, and the necessary compressive strength is 20 kg/cm2. The effect of Loss on Ignition content on mechanical properties is also reviewed.
3D Biosilica Scaffolds from Melophlus sarasinorum and Xestospongia testudinaria Indonesian Sponges are Biocompatible for Cell Growth and Differentiation of Human Wharton’s Jelly Mesenchymal Stem Cell in Bone Tissue Engineering Soraya Rahmanisa; Ekavianty Prajatelistia; Indra Wibowo; Anggraini Barlian
The Indonesian Biomedical Journal Vol 14, No 4 (2022)
Publisher : The Prodia Education and Research Institute (PERI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18585/inabj.v14i4.1895

Abstract

BACKGROUND: Biosilica derived from Indonesian marine sponge Melophlus sarasinorum and Xestospongia testudinaria is one of the biomaterials that can be developed together with synthetic polymer as a composite. Poly E-caprolactone (PCL) used as a composite role as an osteoconductive material together with biosilica and also tailored the slow rate of degradation in the body. This study aimed to create a biocompatible biosilica-based scaffold and supports osteogenic differentiation of human Wharton's Jelly mesenchymal stem cell (hWJ-MSCs).METHODS: Biosilica was extracted from M. sarasinorum and X. testudinaria with the acid digestion method. Scaffold was prepared using the salt leaching method. The composite scaffolds were made from seven different biosilica extract and PCL. All of the scaffolds were tested for the cell morphology, Fourier-transform infrared spectroscopy (FTIR), immunocytochemistry, and cytotoxicity.RESULTS: Composite scaffolds of 50% M. sarasinorum and X. testudinaria increased the cell viability and supported the cell growth within 14 days, whereas the osteogenic differentiation can be seen by the presence of collagen type 1 in day 12 based on immunocytochemistry result.CONCLUSION: The biosilica scaffolds from PCL+50% M. sarasinorum and PCL+50% X. testudinaria were promising 3D scaffolds for potential application in bone tissue engineering. In conclusion, this study shows evidence for the osteogenic differentiation of hWJ-MSC, which might be developed for bone tissue engineering.KEYWORDS: sponge, biosilica, scaffold, osteogenesis, stem cell
Hydroxyapatite/Graphene Composite Anticorrosion Coating on Ti-6Al-4V: Fabrications and Trend Zufar Maulana; Falihah Balqis; Muhammad Irsyad; Alhadi Kasyfi; Ekavianty Prajatelistia; Nurrochman, Andrieanto
ETHOS: Jurnal Penelitian dan Pengabdian kepada Masyarakat Vol. 13 No. 2 (2025): (Juni, 2025) Ethos: Jurnal Penelitian Dan Pengabdian Kepada Masyarakat (Sains
Publisher : UPT Publikasi Ilmiah UNISBA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29313/ethos.v13i2.3814

Abstract

Orthopedics implants have become more crucial for bone replacement as the need for bone replacement increases. Titanium alloy Ti-6Al-4V is widely used as an orthopedic implant due to its high biocompatibility and superior mechanical properties. However, it has several serious drawbacks, such as low corrosion resistance. In order to overcome this demerit, coatings should be applied. Hydroxyapatite, a mineral similar to bone composition, is a good candidate for this purpose. By compositing hydroxyapatite with graphene, the mechanical properties and adhesion of the coating are enhanced. Various coating methods are employed to fabricate this composite coating. This work summarizes and discusses trends, fabrication techniques, and the future perspectives of hydroxyapatite/graphene as a Ti-6Al-4V implant coating.
Co-Authors Alhadi Kasyfi Andrieanto Nurrochman Anggraini Barlian Falihah Balqis Husen Taufiq Indra Wibowo Muhammad Fathurrohman Muhammad Irsyad Ramelan, Aditianto Soraya Rahmanisa Susana Susana Zufar Maulana