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All Journal JOURNAL ONLINE OF PHYSICS Jurnal Pengabdian Masyarakat MIPA dan Pendidikan MIPA Justek : Jurnal Sains Dan Teknologi Jurnal Redoks Sainmatika: Jurnal Ilmiah Matematika dan Ilmu Pengetahuan Alam JURNAL CEMERLANG: Pengabdian pada Masyarakat JPPM (Jurnal Pengabdian dan Pemberdayaan Masyarakat) Jurnal Kumparan Fisika Jurnal Penelitian Fisika dan Terapannya (JUPITER) Environmental Science Journal (esjo)
Atina, Atina
Universitas PGRI Palembang, Indonesia
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Education Energy Environmental Science Industrial & Manufacturing Engineering Mathematics Physics Public Health Social Sciences Other

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Karakterisasi Fisika-Kimia Sabun Cuci Piring Berbasis Ekstrak Buah Mangrove Pedada (Sonneratia caseolaris) Sebagai Material Pembersih Ramah Lingkungan Putri Kartiwi; Jumingin Jumingin; Atina Atina
Environmental Science Journal (esjo) : Jurnal Ilmu Lingkungan 2026: Volume 4 Nomor 2 Juni 2026
Publisher : Universitas PGRI Palembang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31851/esjo.v4i2.21632

Abstract

The use of natural ingredients as components in eco-friendly cleaning products is an important alternative for reducing the impact of synthetic surfactants on human health and aquatic environments. This study aims to analyze the effect of adding pedada mangrove fruit extract (Sonneratia caseolaris) on the physicochemical characteristics of dishwashing soap as an eco-friendly cleaning agent. Extraction was performed using the maceration method with 96% ethanol, and the extract was formulated into liquid dish soap at varying concentrations of 0%, 10%, 15%, and 20%. The testing included phytochemical screening, viscosity, pH, homogeneity, organoleptic evaluation, and foam stability. The results of the phytochemical screening indicated the presence of flavonoids, tannins, and saponins, which have potential as natural antimicrobial agents. The addition of the extract caused a decrease in viscosity from 3550.21 cP to 932.95 cP as the extract concentration increased; however, all formulations still met the SNI 4075-2:2017 standard. The pH ranged from 6.06 to 6.44, which is considered safe for household use and relatively compatible with the skin’s physiological balance. Foam stability increased from 81.82% to 92.59% due to the presence of saponins, which act as natural surfactants. All formulations exhibited good homogeneity without phase separation. The formulation with a 15% extract concentration produced the most optimal and stable physical characteristics. This study indicates that pedada fruit extract has the potential to be developed as a coastal bio-based cleaning biomaterial that supports the concepts of green technology, environmental health, and the sustainability of aquatic ecosystems.
The Effect Of Porosity On The Critical Temperature Of Porous Alumina Ceramics Asep Saputra; Parmin Lumban Toruan; Atina Atina
Justek : Jurnal Sains dan Teknologi Vol 9, No 3 (2026): September
Publisher : Unversitas Muhammadiyah Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31764/justek.v9i3.40611

Abstract

Porous alumina ceramics are widely used in high-temperature applications due to their thermal stability; however, they are vulnerable to thermal shock, which may induce microcrack formation due to thermal stress. Although the influence of porosity on thermal shock resistance has been widely investigated, numerical studies on its effect on the critical cracking temperature remain limited. This study aims to analyze the effect of porosity on the critical temperature of porous alumina ceramics under thermal shock using a Finite Difference Method (FDM) simulation. Porosity variations of 10%, 20%, 30%, and 40% were considered. Thermal shock was modeled by applying a sudden temperature of 2000 K on one side of the material, while the initial temperature was set at 300 K. The resulting temperature distributions were used to evaluate thermal stress and determine the critical temperature for each porosity level. The results show that increasing porosity reduces the maximum thermal stress from 265 MPa at 10% porosity to 60 MPa at 40% porosity. The critical temperature increases from 533 K at 10% porosity to 663 K at 30% porosity, then decreases to 583 K at 40% porosity. These findings provide insight into the role of porosity in controlling thermal shock resistance and can support the optimization of porous alumina ceramics for high-temperature applications.
Co-Authors Alun Pratama Andi Arief Setiawan Asep Saputra Asiah Jumarni Balina Ashari Bella Margareta Dian Mutiara, Dian Duwi Puspita Sari Gelen Pranata Heru Prasetio Indah Safitri Indah Sukria Ita Emilia Joni Iswan Jumingin Jumingin Jumingin Jumingin, Jumingin Leni Sundari Novianti, Dewi Nur Haziza Parmin Lumban Toruan Parmin Lumbantoruan Putri Kartiwi Ratna Ratna Suci permata Sari Suhufa Alfarisa Syahnas Ski Pratiwi Widya Rahmadani