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All Journal Jurnal Neutrino : jurnal fisika dan aplikasinya CERMIN: Jurnal Penelitian
Ubaidillah, Mahrul Junaid
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Agriculture, Biological Sciences & Forestry Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Physics Social Sciences

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ANALYSIS OF SUBSURFACE STRUCTURE OF IRON SAND POTENTIAL WITH 3D MODELLING RESISTIVITY GEOELECTRIC METHOD IN PANDANWANGI VILLAGE KUNIR LUMAJANG Ubaidillah, Mahrul Junaid; Anggraeni, Firdha Kusuma Ayu; Prihandono, Trapsilo Prihandono
Jurnal Neutrino:Jurnal Fisika dan Aplikasinya Vol 17, No 1 (2024): October
Publisher : Universitas Islam Negeri Maulana Malik Ibrahim Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18860/neu.v17i1.27759

Abstract

This research was conducted to analyze the sub-surface structure of the potential iron sand area and the distribution of iron sand depth in terms of its specific resistivity in Pandanwangi Village, Kunir District, Lumajang Regency. This research uses the Wenner configuration resistivity geoelectric method to identify subsurface structures. Measurements were made using 4 lines that have a length of 200 meters per line and then processed using Res2Dinv software to see the results of the 2D cross-section and using Voxler software to see the results of the 3D cross-section. Based on the results of the study, there are several types of rocks and constituent minerals that are below the ground surface, including iron sand, sand, sandstone, and basalt which are found at certain depths. Line 1 tends to contain sand, and line 2 is often passed by residents' vehicles so that it has a different density than other lines because, on line 3, activities are often carried out by local residents. Line 3 has the least iron sand potential compared to other lines, and line 4 has the greatest iron sand potential than other lines. The potential of iron sand is assessed based on its lower resistivity value compared to other rocks and minerals, which is around 0.13-37.11 Ωm.
Pengaruh Suhu Pemanasan dan Durasi Waktu Roasting Terhadap Tingkat Keasaman Biji Kopi Arabika Lorensia, Sinthia Lolita; Prasetya, Nanda Salsabila Ayu; Ubaidillah, Mahrul Junaid; Sumakha, Zahfa Agnia; Mahmudi, Kendid; Prihandono, Trapsilo
CERMIN: Jurnal Penelitian Vol 7 No 2 (2023): Agustus - Desember
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat - Universitas Abdurachman Saleh Situbondo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36841/cermin_unars.v7i2.3708

Abstract

Studi ini menganalisis pengaruh suhu dan durasi waktu roasting biji kopi Arabika terhadap tingkat keasamannya. Kabupaten Jember memiliki potensi pada pertanian kopi salah satunya jenis Arabika, cita rasa dari kopi Arabika ini sendiri cenderung asam. Salah satu tahap yang memiliki pengaruh besar terhadap citarasa dan aroma dalam kopi yang dihasilkan adalah proses roasting. Metode penelitian yang digunakan pada penelitian ini yaitu menggunakan metode studi literatur dengan pengumpulan data dari sumber kepustakaan yang relevan dan didukung dari hasil wawancara. Hasil analisis pengaruh suhu dan lama waktu roasting terhadap tingkat keasaman kopi Arabika menunjukkan bahwa semakin tinggi suhu roasting, tingkat keasaman kopi akan semakin rendah. Durasi waktu roasting juga mempengaruhi tingkat keasaman kopi, meskipun pengaruhnya tidak terlalu signifikan. Namun, penelitian ini menunjukkan bahwa semakin lama durasi waktu roasting, tingkat keasaman kopi juga akan semakin rendah. Oleh karena itu, suhu dan durasi waktu roasting perlu diperhatikan dengan baik dalam proses pembuatan produk kopi untuk menghasilkan kualitas kopi yang superior.
Co-Authors Anggraeni, Firdha Kusuma Ayu Lorensia, Sinthia Lolita Mahmudi, Kendid Prasetya, Nanda Salsabila Ayu Prihandono, Trapsilo Prihandono Sumakha, Zahfa Agnia Trapsilo Prihandono