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Andi Indra Wulan Sari Ramadani
Universitas Negeri Gorontalo
Religion Agriculture, Biological Sciences & Forestry Arts Humanities Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mathematics Physics Social Sciences Other

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Karakterisasi Gugus Fungsi dan Sifat Fisik Komposit ZnO-PVA-Pati dari Kulit Pisang Goroho sebagai Bioplastik Antibakterial Aisyah, Aisyah; Jahja, Mohamad; Mursalin, Mursalin; Irsan, Irsan; Ramadani, Andi Indra Wulan Sari
JFT : Jurnal Fisika dan Terapannya Vol 11 No 2 (2024): DESEMBER
Publisher : Universitas Islam Negeri Alauddin Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24252/jft.v11i2.53109

Abstract

Plastic is one of the most widely used materials in everyday life to support various activities due to its versatile characteristics and functions. Bioplastic is one type of plastic that is easily decomposed naturally by microorganisms so that it becomes a more environmentally friendly compound. This study aims to analyze the characterization of functional groups and physical properties in goroho banana peel starch-based bioplastics with the addition of ZnO and PVA. The method used in this research is laboratory experimental method. The potential of goroho banana peel waste is abundant in Gorontalo Province and the starch content in goroho banana peel is 80.89%, so this research uses starch extracted from goroho banana peel with variations of ZnO addition (0.2%, 0.4%, 0.6%, 0.8%, 1%). The results showed that the addition of ZnO and PVA affected the functional groups and physical properties of bioplastics. The physical properties of bioplastics produced are in accordance with SNI standards, namely the amount of water uptake ranging from 1.39 to 8.21% and the length of bioplastics degraded on average less than 30 days.
KONVERSI ENERGI TERMAL HASIL PEMBAKARAN ECENG GONDOK (EICHHORNIA CRASSIPPES) MENJADI ENERGI LISTRIK MENGGUNAKAN SISTEM TERMOELEKTRIK GENERATOR: Kata Kunci: konversi energi, rancangan termoelektrik generator, biomassa eceng gondok. Lapalutu, Tiara; Arbie, Asri; Ramadani, A Indra Wulan Sari
Inovasi Fisika Indonesia Vol. 14 No. 1 (2025): Vol 14 No 1
Publisher : Jurusan Fisika FMIPA Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/ifi.v14n1.p1-12

Abstract

Penelitian ini bertujuan untuk menganalisis pengaruh perbedaan suhu terhadap daya listrik pada 48 keping Thermoelectric Generator (TEG) dengan konfigurasi tertentu serta mengkaji pengaruh waktu pengisian terhadap arus, tegangan, dan daya listrik yang mengalir menuju superkapasitor saat digunakan untuk menyimpan muatan listrik. Metode penelitian yang digunakan adalah eksperimen dengan teknik pengumpulan data melalui pengukuran langsung. Parameter yang diukur meliputi tegangan dan arus, yang kemudian diolah untuk mendapatkan daya listrik yang dihasilkan. Hasil penelitian menunjukkan bahwa perbedaan suhu yang terjadi berbanding lurus dengan waktu pembakaran. Semakin lama waktu pembakaran, semakin besar perbedaan suhu yang dihasilkan. Pengukuran menunjukkan bahwa konfigurasi seri menghasilkan perbedaan suhu tertinggi, yaitu 26,3°C, sedangkan konfigurasi paralel mencapai 21,6°C. Selain itu, analisis daya listrik menunjukkan bahwa konfigurasi seri menghasilkan daya lebih besar dibandingkan konfigurasi paralel. Dengan demikian, dapat disimpulkan bahwa konfigurasi seri lebih optimal dalam menghasilkan daya listrik dibandingkan konfigurasi paralel pada sistem TEG yang digunakan dalam penelitian ini. Kata Kunci: konversi energi, rancangan termoelektrik generator, biomassa eceng gondok. Abstract This study aims to analyze the effect of temperature differences on electrical power in a system with 48 Thermoelectric Generator (TEG) units with specific configurations and examine the impact of charging time on current, voltage, and electrical power flowing into the supercapacitor when used for electrical charge storage. The research employs an experimental method with data collection conducted through direct measurements. The measured parameters include voltage and current, which are then processed to determine the generated electrical power. The results indicate that the temperature difference is directly proportional to the burning time. The longer the burning time, the greater the temperature difference. Measurements show that the series configuration achieves the highest temperature difference of 26.3°C, while the parallel configuration reaches 21.6°C. Furthermore, power analysis reveals that the series configuration generates more power than the parallel configuration. Thus, it can be concluded that the series configuration is more optimal in generating electrical power compared to the parallel configuration in the TEG system used in this study. Keywords: energy conversion, thermoelectric generator design, water hyacinth biomass.
KARAKTERISTIK FISIKA MIKROPLASTIK PADA AIR DAN IKAN MUJAIR (Oreochromis mossambicus) DI DANAU LIMBOTO Ismail, Sri Yanti N.; Jahja, Mohamad; Ramadani, A Indra Wulan Sari; Supu, Idawati; Arbie, Asri; Kurniasari, Septiana; Gafur, Nurfitri Abdul
BIOCHEPHY: Journal of Science Education Vol. 5 No. 1 (2025)
Publisher : MO.RI Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52562/biochephy.v5i1.1473

Abstract

Mikroplastik merupakan salah satu jenis pencemaran yang berbahaya baik di darat maupun ekosistem perairan. Dengan menurunnya kualitas perairan merupakan salah satu permasalahan yang berada pada lingkungan danau Limboto yang disebabkan oleh pencemaran dan pendangkalan kondisi danau Limboto saat ini sangat memprihatinkan. Penelitian ini bertujuan untuk mengetahui karakteristik mikroplastik yang terkandung pada air dan ikan mujair (Oreochromis mossambicus)  pada perairan Danau Limboto.  Penelitian ini menggunakan alat mikroskop USB Traveler untuk mengidentifikasi bentuk dan warna mikroplastik. Berdasarkan hasil penelitian yang dilakukan Mikroplastik yang ditemukan pada air dan ikan mujair yaitu fiber, pellet dan fragmen. Warna mikroplastik pada ikan mujair dan air danau Limboto berwarna hitam, biru, kuning, hijau, merah cokelat dan putih.
Karakterisasi Sifat Fisik Bioplastik Berbasis Pati Kulit Pisang Goroho dengan Penambahan ZnO Devita Irawati Putri; Jahja, Mohamad; Yunginger, Raghel; Latief, Muh. Fachrul; Ramadani, Andi Indra Wulan Sari
JFT : Jurnal Fisika dan Terapannya Vol 12 No 1 (2025): Juni 2025
Publisher : Universitas Islam Negeri Alauddin Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24252/jft.v12i1.53106

Abstract

An effective way to address the plastic waste problem is by minimizing the use of non-biodegradable plastics. One approach is to develop biodegradable plastic packaging that is environmentally friendly. This research used Goroho banana peel starch, this type of banana is used because it has good potential with a starch content of 80.89%. In this research, variations in ZnO concentration of 1%, 2%, 3%, 4%, and 5% w/w were conducted. This research aims to determine the characteristics of physical properties of bioplastics with the addition of ZnO. This research uses a laboratory experimental method through several processes, namely goroho banana peel starch extraction and bioplastic manufacturing. The results indicated that varying concentrations of ZnO significantly influenced the physical and biodegradation properties of the bioplastic products. The physical properties of the bioplastics produced have met the Indonesian National Standard (SNI) for water uptake of 21.5% and biodegradation of 60 days. FTIR results show that the functional groups of bioplastics are identical to the constituent functional groups, namely starch, so that their properties resemble the properties of their constituents, which are easily degraded. The most optimum bioplastic is BPZ 2 with the addition of ZnO at 2% w/w, which produces water uptake of 1.859% and degradation time of 12 days.
Thermal Performance of Public Green Space using Palm Fiber Net-Based Green Canopy and Passion Fruit (Passiflora Edulis) Vegetation Muksin, Engelina; Jahja, Mohamad; Setiawan, Dewa Gede Eka; Ramadani, A Indra Wulan Sari; Djafar, Abdi Gunawan; Latief, Muh. Fachrul
Computational And Experimental Research In Materials And Renewable Energy Vol. 8 No. 1 (2025): May
Publisher : Physics Department, Faculty of Mathematics and Natural Sciences, University of Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/cerimre.v8i1.53398

Abstract

This study aims to evaluate the thermal performance of green canopies in public green spaces (RTH), both outdoors and indoors, as an environmentally friendly solution. The method involved measuring temperature and humidity over a five-month period with four observation intervals. The data were analyzed using the Temperature-Humidity Index (THI) and compared with thermal comfort standards based on the Indonesian National Standard (SNI). The results show that at 0% plant coverage, the THI values fall into the "comfortable to slightly uncomfortable" category during the period from 19:00 to 08:00. In contrast, at 81.25% plant coverage, THI values remain in the "comfortable to slightly uncomfortable" range from 21:00 to 09:00. Relative humidity met the SNI standard of 75%. Furthermore, the outdoor temperature decreased by 4.9 °C, while the indoor temperature decreased by 3.5 °C. These findings indicate that the presence of green canopies, particularly in private green spaces, significantly reduces both outdoor and indoor temperatures as the percentage of plant coverage increases.Keywords: Public Green Space, Green Canopy, Temperature Humidity Index, Indonesian National Standards
Co-Authors Abdi Gunawan Djafar Abdul Haris Aisyah Aisyah Asmiati Amir Asri Arbie Devita Irawati Putri Dewa Gede Eka Setiawan Diana Eka Pratiwi Fitriani Fitriani Gafur, Nurfitri Abdul Haris Munandar Harsano Jayadi Hasan Arif Efendi Indriati Martha Patuti Irsan Rahman Ismail, Sri Yanti N. Jahja, Mohamad Jajat Jatnika Juintan Pratiwi Kurniasari, Septiana Lapalutu, Tiara Latief, Muh. Fachrul Lukman Samatowa Meidji, Icha Untari Meilan Demulawa Mohamad Ramdhan Muh Fachrul Latief Muh Fachrul Latief Muh. Nur Akbar Muhammad Yunus Muhammad Yunus Muhammad Yunus Muksin, Engelina Mursalin . Siti Fatimah Subaer Subaer Supu, Idawati Suriati Eka Putri Tang, Bunga