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Jurnal Fisika Unand
Published by Universitas Andalas
ISSN : 23028491     EISSN : 26862433     DOI : https://doi.org/10.25077/jfu
Core Subject : Science, Engineering,
Earth & Planetary Sciences Electrical & Electronics Engineering Energy Materials Science & Nanotechnology Physics
Makalah yang dapat dipublikasikan dalam jurnal ini adalah makalah dalam bidang Fisika meliputi Fisika Atmosfir, Fisika Bumi, Fisika Intrumentasi, Fisika Material, Fisika Nuklir, Fisika Radiasi, Fisika Komputasi, Fisika Teori, Biofisika, ataupun bidang lain yang masih ada kaitannya dengan ilmu fisika.
Arjuna Subject : Fisika dan Astronomi - Fisika Nuklir dan Molekuler, dan Ooptik
Articles 1,782 Documents
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Verifikasi Dosis Radiasi Permukaan pada Kasus Kanker Payudara Menggunakan Metode Dosimetri In Vivo Wulandari, Sri; Adrial, Rico; Ulya, Syarifatul; Diyona, Fiqi
Jurnal Fisika Unand Vol 13 No 5 (2024)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jfu.13.5.630-636.2024

Abstract

Verification of surface radiation dose in breast cancer cases using the in vivo dosimetry method with TLD-100 at the Radiation Oncology Unit of Andalas University Hospital has been carried out. The aim of the study is to verify the adequacy of the surface radiation dose calculated by the Treatment Planning System (TPS) with the measured radiation dose of TLD-100, referring to the report of the American Association of Physicists in Medicine Task Group No.219 (AAPM-TG No.219). This study began with the annealing of the TLD-100, namely the cleaning of the electrons trapped by the TLD-100 at the Research Center for Safety Technology Metrology and Nuclear Quality of the National Innovation Research Agency (PRTKMMR-BRIN), followed by the scanning of the TLD-100 on the surface of the phantom plate using a CT simulator. In addition, the TLD-100 was calibrated with different radiation doses (0; 20; 50; 80; 100; 150; 200; 250; 370) cGy. Verification of surface radiation dose on five breast cancer treatment planning data with TPS surface radiation dose calculation by Patient Specific Quality Assurance (PSQA) or transfer of patient treatment plan to slab phantom and compared with radiation dose measured on TLD 100. The measured surface radiation dose was found to range from 115.07 cGy to 130.81 cGy. Verification showed that the difference between the radiation dose calculated by the TPS and that measured by the TLD-100 was 0.21% to 8.13%. This shows that the surface radiation dose in breast cancer cases is within the 20% tolerance limit set by AAPM-TG No.219.
Perbandingan Efektivitas Ekstraksi Pektin dari Kulit Durian dengan Bantuan Gelombang Ultrasonik dan Metode Konvensional Puspita, Selvia Indah; Sekarlita, Yovita; Kurniati, Ely; Susilowati, Titi; Billah, Mu'tassim
Jurnal Fisika Unand Vol 13 No 3 (2024)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jfu.13.3.427-432.2024

Abstract

Tujuan dari penelitian ini adalah untuk membandingkan ekstraksi pektin kulit durian menggunakan gelombang ultrasonik dan konvensional; untuk mengetahui pengaruh pH larutan HCl dan waktu ekstraksi terhadap yield pektin dan kadar metoksil. Metode penelitian ini menggunakan ekstraksi dengan bantuan gelombang ultrasonik dan konvensional pada frekuensi 20 KHz dan suhu 70oC dengan variasi waktu ekstraksi yaitu 15; 45; 75 menit serta pH larutan HCl 1,5;2,5;3,5. Yield pektin tertinggi diperoleh dengan menggunakan bantuan gelombang ultrasonik pada frekuensi 20 KHz, suhu 70oC selama 75 menit dan pH larutan HCl 1,5 sebesar 7,081% sementara menggunakan metode konvensional dengan kondisi suhu, waktu ekstraksi, dan pH larutan HCl yang sama sebesar 1,8646%. Kadar metoksil terendah diperoleh dengan menggunakan bantuan gelombang ultrasonik pada frekuensi 20 KHz, suhu 70oC selama 15 menit dan pH larutan HCl 1,5 sebesar 5,9% sedangkan menggunakan metode konvensional dengan kondisi suhu, waktu ekstraksi, dan pH larutan HCl yang sama sebesar 6,11%. 
Analisis Korelasi Usia, Massa Tubuh, mAs, dan Dosis Efektif Terhadap CTDIvol dan DLP pada Pemeriksaan CT-Scan Pasien Dewasa Dewanti, Wafi Muthia; Milvita, Dian; Fardela, Ramacos; Pratama, Ida Bagus Gede Putra; Herlinda, Sri
Jurnal Fisika Unand Vol 13 No 4 (2024)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jfu.13.4.579-586.2024

Abstract

A research study has been conducted on the correlation analysis of age, body mass, mAs, and effective dose with Computed Tomography Dose Index Volume (CTDIvol) and Dose Length Product (DLP) in CT-Scan examinations at the Radiology Department of Dr. M. Djamil Padang General Hospital. The research utilized data from adult patients aged 15 years and above with a standard body mass (60 ± 10) kg in non-contrast CT scans of the head, chest, and abdomen, with a total of 586 patients collected over a period of 3 months. The analysis was conducted using Pearson correlation test. The research results indicate that the effective dose has a very high correlation with DLP, with a coefficient of 1 and mAs has a very high correlation with CTDIvol and DLP, with a coefficient of 0,9. Body mass has a relatively high correlation with CTDIvol and DLP, ranging from 0,4 to 0,7 except in head examinations. Age has a moderately significant correlation with CTDIvol and DLP, ranging from 0,1 to 0,5.
Pemodelan Struktur Lapisan Bawah Permukaan Berdasarkan Tahanan Jenis di Dusun Rombo Desa Saukang Kecamatan Sinjai Timur Kabupaten Sinjai Provinsi Sulawesi Selatan Rifanzha, Aqil Naufaldy; Lanto, Muh Said; Minarti, Minarti
Jurnal Fisika Unand Vol 13 No 4 (2024)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jfu.13.4.564-572.2024

Abstract

Research has been carried out which aims to model the structure of the subsurface layers in Rombo Hamlet, Saukang Village, East Sinjai District, in Sinjai Regency. This research uses the resistivity geoelectric method of the Wenner-Schlumberger configuration. The number of measurement paths consists of five tracks, each 150 m. The geology of the research location includes the Walanae Formation, which consists of sandstones, conglomerates, tuffs, siltstones, claystones, limestones, and marls. The results of the study allegedly show that the subsurface structure consists of several layers with interpretations in the form of groundwater aquifers, sandstones, and claystones. The first track shows a resistivity value of 0.753 Ωm to 3.22 Ωm where there are free aquifers at a depth of 1.25 meters to 24.0 meters, the second track has free aquifers and confined aquifers with resistivity values of 0.976 Ωm to 3.75 Ωm which are at a depth of 1.25 meters to 28.7 meters, the third track shows a resistivity value of 0.643 Ω to 2.46 Ωm there are free and confined aquifers that spread at depths of 15.9 meters to 28.7 meters, the fourth line has free aquifers and aquifers The depressed aquifer which has a resistivity value of 1.83 Ωm to 6.27 Ωm is at a depth of 5.19 meters to 28.7 meters, while on the fifth line at a depth of 1.25 meters to 28.7 meters there are free aquifers and confined aquifers which have resistivity value of 0.801 Ωm to 4.10 Ωm.
Analisis Komponen Angin Zonal dan Meridional Sebagai Penentu Awal Musim di Wilayah Tana Toraja Utami, Herniella Tiara; Arsyad, Muhammad; Husain, Husain
Jurnal Fisika Unand Vol 13 No 4 (2024)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jfu.13.4.549-556.2024

Abstract

The determination of the onset of season typically utilizes the rainfall distribution pattern during the climatological period in the form of a bar graph. However, according to previous research, the prediction of the onset of the season can also use the components of Zonal and Meridional winds. There hasn't been much research related to the onset of season in Tana Toraja; therefore, this study aims to determine the profile of Zonal and Meridional winds at the 850 mb level and their relation to the onset of season in Tana Toraja during the climatology period from 1998 to 2022 (25 years) as well as during El Niño and La Niña events. Reference data for this analysis is sourced from daily precipitation records from the Toraja Meteorological Station and daily Zonal and Meridional wind array model data from the European Centre for Medium-Range Weather Forecasts (ECMWF). The collected data is then visualized through maps and graphs, followed by spatial and descriptive analysis for the klimatologi period, El Niño, and La Niña events. The analysis findings reveal that the rainfall pattern in Tana Toraja is significantly influenced by monsoonal winds, particularly characterized by the prevalence of westerly Zonal winds during the rainy season. The onset of the rainy season typically occurs in early July, with the peak of the rainy season usually observed from mid-March to mid-April. Zonal winds during El Niño and La Niña events notably impact rainfall accumulation in the Tana Toraja region, resulting in variations in the strength of Zonal and Meridional winds.
Penentuan Aktivitas Radionuklida Alam pada Pemandian Air Panas Gunung Panjang dan Gunung Pancar di Kabupaten Bogor Jawa Barat Zulfa, Naela Amalia; Adrial, Rico; Makmur, Murdahayu; Yahya, Mohamad Nur; Putra, Deddy Irawan Permana; Priasetyono, Yogi
Jurnal Fisika Unand Vol 13 No 4 (2024)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jfu.13.4.541-548.2024

Abstract

Research has been conducted on the determination activity of natural radionuclides at hot springs in Bogor Regency, West Java. This study aimed to determine the concentration value of natural radionuclide activity in hot springs. This study used water samples taken from water samples taken from water in two different hot spring locations, namely in Gunung Panjang Hot Spring and Gunung Panjang Hot Spring. Activity concentrations were measured using an HPGe gamma spectrometer for radionuclides 238U, 232Th, and 40K. Activity concentrations for radionuclide 238U ranged from (0.13 ± 0.01) to (33.82 ± 0.24) Bq/L, for 232Th ranged from (0.08 ± 0.01) to (100.30 ± 0.01) Bq/L and 40K ranged from (0.18 ± 0.01) to (416.84 ± 0.09) Bq/L. The concentration values of 238U, 232Th, and 40K are still below the specified threshold. The activity concentration limit of radionuclides recommended by PERKA BAPETEN No. 9 Year 2009 on Intervention Against Exposure from Technologically Enhanced Naturally Occurring Radioactive Material is 1000 Bq/L for 238U and 232Th and 10,000 Bq/L for 40K.
Identifikasi Pencemaran Air Laut di Pesisir Pantai Sungai Pisang Kota Padang Ditinjau dari Parameter Fisika dan Kimia Rinaldi, Muhammad; Puryanti, Dwi; Purwanto, Eko
Jurnal Fisika Unand Vol 13 No 5 (2024)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jfu.13.5.690-696.2024

Abstract

This research aims to identify seawater pollution by determining the concentration of heavy metals (Pb, Cd, and Cu), electrical conductivity, total dissolved solids (TDS), total suspended solids (TSS), temperature, and pH in seawater samples from the coast of Sungai. Pisang, Padang City. Heavy metal concentration values were measured using an Atomic Absorption Spectroscopy (AAS), electrical conductivity was measured using a conductivity meter, TDS and TSS were determined using the gravimetric method, temperature was measured using a thermometer, and pH was measured using a pH meter. From the research results, the highest pH value was obtained at 7.8, the highest temperature value was 33 ℃, the highest electrical conductivity value was 163.6 µS/cm and the highest TSS value was 22.6 mg/L. The average values of pH, temperature, electrical conductivity and TSS obtained did not exceed the quality standard limits based on Minister of the Environment Regulation Number 51 of 2004. The highest TDS value obtained was 3821 mg/L and did not exceed the quality standard limits based on Republic of Indonesia Government Regulation Number 82 of 2001. The concentration values of the heavy metals Pb, Cd, and Cu on the coast of the Sungai Pisang did not exceed the quality standard limits based on Minister of Environment Regulation Number 51 of 2004. From the research results it can be concluded that the sea water on the coast of the Sungai Pisang not polluted.
Analisis Hubungan Suhu, Kelembapan Dan Curah Hujan Di Tana Toraja Dengan Fenomena Perubahan Iklim Pabontongan, Santonius Sandi; Palloan, Pariabti; Susanto, Agus
Jurnal Fisika Unand Vol 13 No 4 (2024)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jfu.13.4.557-563.2024

Abstract

The impact of climate change has emerged as a strategic issue threatening the national interests and environment, particularly in the context of Tana Toraja in the tropical region of Indonesia. The process of climate change, influenced by both natural factors and human activities, has led to a global increase in temperatures and climate anomalies. The risks of natural disasters, especially those related to rainfall such as floods, landslides, and the spread of diseases, are on the rise. The Indonesian government needs to design region development strategies with low greenhouse gas emissions and control deforestation. This study employs a qualitative descriptive method and utilizes data from the Pongtiku Toraja Meteorological Station from 2000 to 2019 to analyze the patterns of climate change and the impact of the El-Nino Southern Oscillation (ENSO) in Tana Toraja. The research findings indicate a decrease in the annual average air temperature, an increase in air humidity, and a shift in rainfall patterns towards an equatorial climate type. The impact of ENSO on air temperature, humidity, and rainfall is variable. Predictions suggest a decrease in rainfall, but combined analyses show an average increase of 4.5% per year until 2029. This conclusion provides a holistic overview of climate dynamics in Tana Toraja, crucial for understanding and planning adaptation for the future.
Identifikasi Potensi Daerah Rawan Banjir Berdasarkan Nilai Resistivitas dan Porositas Batuan Dengan Menggunakan Metode VES di Desa Batik Nau Kabupaten Bengkulu Utara Fazeza, Nesti; Suhendra, Suhendra; Barasa, Habel; Halaudin, Halaudin
Jurnal Fisika Unand Vol 13 No 3 (2024)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jfu.13.3.343-350.2024

Abstract

Penelitian dilakukan di Desa Batik Nau,Kabupaten Bengkulu Utara, yang rentan terhadap banjir. Fokus penelitian ini adalah mengidentifikasi resitivitas dan porositas batuan serta kondisi geologi untuk menilai potensi daerah yang rentan terdampak banjir.Dengan menggunakan konfigurasi Schlumberger untuk Metode Vertical Electrical Sounding (VES) pada 30 titik penelitian di sepanjang daerah rawan banjir. Data utama diperoleh menggunakan alat Geolistrik IP Meter MAE X612-EM, kemudian diproses dengan perangkat lunak Progress 3.0 untuk menghasilkan gambaran Resistivity Log 1D,yang kemudian diinversikan dan dianalisis untuk menyesuaikan dengan peta geologi. Selanjutnya dilakukan analisis matematis secara 3D dengan menggunakan perangkat lunak Voxler 4.0 untuk mendapatkan hasil gambaran porositas secara lapisanan. Hasil interpretasi menunjukkan bahwa lapisan bawah permukaan tanah di Desa Batik Nau rata – rata di penuhi dengan batuan alluvium yang berjenis lempung(tanah liat), kerikil pasiran, dan napal. Porositas yang memiliki rata-rata rendah, menunjukkan bahwa daerah penelitian ini cenderung jenuh terhadap udara, sehingga menyebabkan terakumulasi saat musim hujan.
Potensi Ekstrak Kulit Buah Naga Merah (Hylocereus polyrhizus) sebagai Bioreduktor Untuk Biosintesis Nanopartikel Putri, Hawa Aritma Sunarko; Oktarini, Rahmi; Islamiyah, Syuaibatul; Redjeki, Sri; Yogaswara, Rachmad Ramadhan
Jurnal Fisika Unand Vol 13 No 4 (2024)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jfu.13.4.497-503.2024

Abstract

One type of antioxidant that is usually found in plants such as fruit, skin, leaves, and others is flavonoids. In addition, flavonoids can be used for the formation of nanoparticles (NPs) as a bioreductor. The purpose of this study was to examine the utilization of red dragon fruit peel extract as a bioreductor in the synthesis of zinc oxide nanoparticles from zinc nitrate precursors using the biosynthesis method. Red dragon fruit peel was macerated to obtain flavonoids. Zinc nitrate was used as a precursor to make ZnO NPs. UV-VIS spectrophotometric analysis showed that the total flavonoids contained in the extract were 5.6 x 10-4 mg QE/g. By FTIR test, ZnO nanoparticles are known to contain OH groups characterized by a peak in the 3374.10 cm-1 region. XRD results show that ZnO nanoparticles have a hexagonal wurtzite shape. SEM-EDX results show that the ZnO nanoparticles formed have a size of 157-174 nm and contain the constituent composition of 69.41% zinc and 29.35% oxygen. ZnO nanoparticles have anticancer effects that can be used in anticancer drugs, which can efficiently suppress synergistic cytoxicity in leukemia cell lines under UV irradiation. 

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