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All Journal Al-Fiziya: Journal of Materials Science, Geophysics, Instrumentation and Theoretical Physics POSITRON Jurnal Penelitian Fisika dan Aplikasinya (JPFA) Jurnal Sains dan Teknologi Komunikasi Fisika Indonesia Jurnal Litbang Industri JOURNAL ONLINE OF PHYSICS Jurnal Fisika FLUX JMPM (Jurnal Material dan Proses Manufaktur) Jurnal Pengabdian UntukMu NegeRI Journal of Research and Technology JURNAL PHOTON Jurnal Fisika : Fisika Sains dan Aplikasinya Indonesian Physical Review Jurnal Teori dan Aplikasi Fisika Jurnal Fisika dan Terapannya Science, Technology, and Communication Journal
Delovita Ginting, Delovita
Department Of Physics, Universitas Muhammadiyah Riau, Pekanbaru 28291, Indonesia
Religion Agriculture, Biological Sciences & Forestry Astronomy Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mechanical Engineering Nursing Physics Social Sciences

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Fabrication of Anti-Termite Particle Boards Made from Bintaro (Cerbera Manghas): Analysis of Physical and Mechanical Properties Ginting, Delovita; Azizah, Nur
JMPM (Jurnal Material dan Proses Manufaktur) Vol. 7 No. 2 (2023): December
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/jmpm.v7i2.19724

Abstract

Termites are commonly seen as a nuisance due to their capacity to cause harm to wooden objects. The occurrence of termite infestations on furniture has led to a rise in financial damages attributed to such attacks. Hence, it is of utmost need to seek alternative raw materials that exhibit resistance to termite-induced deterioration, thereby fulfilling the requirement for substituting particle board. The present study has successfully demonstrated the fabrication of particle board by including bintaro fruit seed filler and urea formaldehyde matrix. The primary objective of this research endeavor was to explore an alternate approach to standard particle board production, specifically focusing on the development of anti-termite qualities. The filler fraction to matrix fraction comparison exhibits variations of 50:50, 60:40, 70:30, and 80:20. The particle board production process employed in this study utilizes a cold pressing method, wherein a pressure of 15 MPa is applied for a duration of 120 minutes. The board particles that have been acquired are subjected to testing in order to ascertain their physical characteristics, such as density and water content. The experiment was conducted in compliance with the SNI Standard 03-2105-2006. The flexural strength of particle board was evaluated in accordance with the standard SNI 03-2105-2006. An assessment was conducted to evaluate the susceptibility of particle board to termite infestation, in accordance with the guidelines outlined in the SNI 01-7207-2006 standards. The density and moisture content testing findings conducted on particle board match with the specifications outlined in the SNI 03-2105-2006 standard. The experimental outcomes evaluating the susceptibility of board particles to termite infestations have effectively fulfilled the requirements outlined in the SNI 01-7207-2006 standards.
Evaluasi Kinerja Elektrokimia Katoda LiFePO4 dengan Variasi Aditif Graphene Oxide, Reduced Graphene Oxide dan Koloid Nanopartikel Perak (AgNP) Agun Pranata; Delovita ginting; Romi Fadli Syahputra
Jurnal Teori dan Aplikasi Fisika Vol. 14 No. 01 (2026): Jurnal Teori dan Aplikasi Fisika
Publisher : Department of Physics, Faculty of Mathematics and Natural Sciences, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtaf.v14i01.558

Abstract

The low electronic conductivity of Lithium Iron Phosphate (LFP) cathodes presents a major challenge for their application in lithium-ion batteries. This research aims to enhance the electrochemical performance of LFP by comparing the effects of three different conductive additives: Graphene Oxide (GO), reduced Graphene Oxide (rGO), and a Silver Nanoparticles (AgNP) composite. GO was synthesized from graphite powder via a modified Hummers’ method, followed by the fabrication of three cathode variations. Material characterization was performed using X-Ray Diffraction (XRD), UV-Diffuse Reflectance Spectroscopy (UV-DRS), and Cyclic Voltammetry (CV). XRD analysis confirmed the successful synthesis of GO, evidenced by the shift of the main diffraction peak from 26.24° in graphite to 9.80° in GO. Band gap (Eg) analysis from UV-DRS data showed that the addition of rGO and the AgNP effectively reduced the Eg value to 2.91 Ev and 2.73 Ev, respectively, from the initial value of 3.10 Ev for the LFP+GO sample. Electrochemical tests indicated that the LFP+rGO cathode exhibited the most significant current response, achieving the highest specific capacitance of 5.0 F/g at a scan rate of 5 Mv/s. These results confirm that rGO is the most effective additive among the three variations for enhancing the electrochemical properties of LiFePO4 cathodes. Keywords: LiFePO₄, Graphene Oxide, Reduced Graphene Oxide, Silver Nanoparticles, Specific Capacitance.  
EFEKTIVITAS ADSORBEN LIMBAH AMPAS KOPI PADA LIMBAH CAIR KELAPA SAWIT Putra, Rendy Pratama; Ginting, Delovita; Syahputra, Romi Fadli
JOURNAL ONLINE OF PHYSICS Vol. 11 No. 2 (2026): JOP (Journal Online of Physics) Vol 11 No 2
Publisher : Prodi Fisika FST UNJA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22437/jop.v11i2.53154

Abstract

Limbah cair pabrik kelapa sawit (Palm Oil Mill Effluent/POME) memiliki kandungan bahan organik yang tinggi, yang tercermin dari nilai Chemical Oxygen Demand (COD), sehingga berpotensi menimbulkan pencemaran lingkungan apabila tidak diolah secara memadai. Penelitian ini bertujuan untuk mengevaluasi kemampuan adsorben berbasis limbah ampas kopi dalam menurunkan COD POME serta mengkaji kinetika adsorpsinya. Proses adsorpsi dilakukan secara batch dengan variasi waktu kontak 35–95 menit. Karakterisasi adsorben dilakukan menggunakan Fourier Transform Infrared Spectroscopy (FTIR) untuk mengidentifikasi gugus fungsi dan Scanning Electron Microscopy (SEM) untuk mengamati morfologi permukaan. Analisis kinetika adsorpsi difokuskan pada model Elovich, Bangham, dan Boyd untuk menilai kesesuaian model terhadap data eksperimen. Hasil penelitian menunjukkan bahwa adsorben ampas kopi mampu menurunkan COD POME dengan efisiensi maksimum 13,13% dan kapasitas adsorpsi 2,8604 mg/g pada waktu kontak optimum 65 menit. Di antara model yang diuji, model Bangham memberikan kecocokan terbaik, sedangkan model Boyd menunjukkan kesesuaian yang sangat rendah. Temuan ini menunjukkan bahwa adsorben limbah ampas kopi berpotensi digunakan sebagai adsorben alternatif, tetapi masih memerlukan optimasi lebih lanjut sebelum diterapkan pada skala yang lebih luas.
Optimization of Electrophotographic Toner Using Reduced Graphene Oxide and Palm Shell Carbon Aerogel Ginting, Delovita; Billah, Salsa; Fadli Syahputra, Romi
Photon: Jurnal Sain dan Kesehatan Vol. 16 No. 2 (2026): Journal Photon
Publisher : LPPM Universitas Muhammadiyah Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Toner is a powdered ink used in electrophotographic printing technology. This research aims to develop an electrophotographic toner based on carbon aerogel composite of palm shell activated carbon enriched with reduced graphene oxide and polyester resin. Carbon aerogel synthesis was carried out through chemical activation and carbonization process, while toner formulation used Emulsion Aggregation (EA) method. Characterization results showed that the density of toner was 1,31 g/cm3 and toner was 0,81 g/cm3, porosity reached 88%, and the highest electrical conductivity was 18.246 μS/cm. These findings indicate that the integration of carbon aerogel and reduced graphene oxide in toner formulations results in densities close to the range of commercial toners as well as higher porosity than hydrocolloid-based toners. The toner formulation in this study has the potential to support the efficiency of toner usage and printing without reducing the quality of the printed output.
Design and testing of circular metamaterial-based salinity sensors Yona Purnama Rezki; Romi Fadli Syahputra; Delovita Ginting
Science, Technology, and Communication Journal Vol. 3 No. 3 (2023): SINTECHCOM Journal (June 2023)
Publisher : Lembaga Studi Pendidikan dan Rekayasa Alam Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59190/stc.v3i3.234

Abstract

The salinity sensor is a salt level detection tool designed based on the electrical properties of water. The salinity sensor consists of two electrodes that are dipped in water where the sensor is given a potential difference so that electrons flow in the sensor-building circuit. The electrode is connected to a variable resistor which forms a voltage divider circuit connection. This research aims to design a metamaterial (MTM) sensor to detect salt levels in the 100 – 900 MHz range and investigate the performance of MTM sensors for detecting salt levels. The working MTM sensor design has been successfully designed and tested, where the MTM sensor is also able to differentiate frequency values from samples with different salt levels.
Pendampingan Tata Kelola Laboratorium Fisika SMA/SMK di Kota Pekanbaru melalui Kolaborasi Perguruan Tinggi dan Sekolah Syahputra, Romi Fadli; Husna, Rofiqotul; Dalimunthe, Latipa Hannum; Lestari, Dinda; Rahmadani, Nofia; Fahturrahman, Fauzan; Fitri, Yulia; Retnawaty, Sri Fitra; Wirman, Shabri Putra; Fitrya, Neneng; Ginting, Delovita; Badrun, Yeeri; Gesriantuti, Novia; Herlina, Noftripa
Jurnal Pengabdian UntukMu NegeRI Vol. 10 No. 2 (2026): Pengabdian Untuk Mu negeRI
Publisher : LPPM UMRI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37859/jpumri.v10i2.12566

Abstract

This community service programme aimed to strengthen physics laboratory management and practical activities at three senior and vocational secondary schools in Pekanbaru, Indonesia. Conducted by lecturers and students of the Physics Study Programme, Universitas Muhammadiyah Riau, the programme involved partner assessment, orientation, implementation, and evaluation. Activities included developing Standard Operating Procedures (SOPs), inventorying laboratory equipment, preparing practical modules based on real experiments and PhET virtual simulations, and conducting practical training. Programme outcomes were evaluated through questionnaires administered to students and supervising teachers. Before the programme, 60% of students had never participated in physics practical activities. Following the intervention, all students (100%) reported improved understanding of the practical materials, with 20% reporting very good understanding, 33.3% good understanding, and 46.7% adequate understanding. Furthermore, 93.3% of students expressed positive attitudes towards physics practical activities and actively participated in recording and maintaining laboratory equipment. The programme also supported the development of students’ soft skills, particularly communication, collaboration, and leadership. Overall, the programme demonstrated the potential of university–school collaboration to strengthen laboratory management, enhance physics learning experiences, and provide a sustainable partnership model supporting the implementation of the Merdeka Belajar-Kampus Merdeka (MBKM) policy.
Co-Authors - Rusmi -, Yeeri Badrun Adila Fitri Yani Yani Agun Pranata Ahmad Kafrawi Nasution Ahmad Kafrawi Nasution, Ahmad Kafrawi Aisah, Nurul Anggreani, Selvia Ariyani Asmawati Asmawati Ayu Risti Candini Billah, Salsa Budi Istana Candini, Ayu Risti Dahayu, Putri Dalimunthe, Latipa Hannum Elsie Erman Taer Fadli Syahputra, Romi Fahturrahman, Fauzan Haryanti, Rismadani Herlina, Noftripa Husna, Rofiqotul Husna, Ropiqotul Ismail, Noor Maizura Ismaliyah, Dhea ISRAWATI HARAHAP Iwantono Iwan Barnawi karnila ila sukma Kusmawati, Intan Laras Sita Widara Lega Putri Utami Leli Nurhamiyah Lestari, Dinda Lubis, Viviana Na Duma, Tulus Neneng Fitrya Noni Febriani Noni Febriani Noni Febriani Noni Febriani Noni Febriani, Noni Nopripa Herlina Novia Gesriantuti Nur Azizah Nurhamiyah, Leli Piza Piza Piza, Piza Putra, Rendy Pratama Rachmawati Rachmawati Rahmadani, Nofia Reka Nuansa Fitri Reka Nuansa Fitri Retnawaty, Sri Fitra Rismadani Haryanti Romi Fadli Syahputra Rusmi, - Saktioto Saktioto Sasmita Sasmita Shabri Putra Wirman Sri Fitria Retnawaty Sri Mulyani Suryani, Yola Syahputra, Romi Tri Adelia Viviana Lubis Viviana Lubis wirdatul jannah Wirdatul Jannah WULANDARI Wulandari, Surya Yana, Debi Yani, Adila Fitri Yeeri Badrun Yona Purnama Rezki Yulia Fitri Yulia Fitri