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All Journal Teknosains: Media Informasi Sains dan Teknologi Jurnal Fisika dan Terapannya Media Ilmiah Kesehatan Indonesia Jurnal Pertambangan dan Lingkungan
Ihsan Ihsan
Universitas Islam Negeri Alauddin Makassar
Agriculture, Biological Sciences & Forestry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Engineering Environmental Science Health Professions Medicine & Pharmacology Nursing Physics Public Health Veterinary

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AVALANCHE MITIGATION USING THE GEOELECTRICAL RESISTIVITY METHOD OF SCHLUMBERGER CONFIGURATION IN TIROMANDA VILLAGE MAKALE SELATAN DISTRICT TANA TORAJA REGENCY Ibrahim Adhyatma Ismail; Ayusari Wahyuni; Ihsan Ihsan; Hernawati Hernawati; Bergita GM Saka
JURNAL PERTAMBANGAN DAN LINGKUNGAN Vol 3, No 1 (2022): JUNI 2022
Publisher : Universitas Muhammadiyah Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31764/jpl.v3i1.9615

Abstract

Mitigation of landslides in Tiromanda sub-district, Makale Selatan sub-district, Tana Toraja district using the shclumberger configuration geoelectrical resistivity method plays an important role in reducing disaster risk. This study aims to determine the distribution of rock lithology in the Tiromanda sub-district, Makale Selatan district, Tana Toraja district. In this study, measurements were made using the geoelectrical resistivity method of the Schlumberger configuration. Measurements were made on 2 tracks with a length of each track is 120 m with the smallest spacing is 1.5 m and the largest spacing is 10 m. The results showed that the lithology in Tiromanda village consisted of three types of rock lithology, namely overburden with a resistivity of 10.7 m – 21.9 m, shale with a resistivity of 157 m – 1955 m, and sediment containing water with a resistivity of 0.484 m – 15.5 m. Based on the results of the analysis of the data indicated as a slip plane at coordinates S 2˚57'13.0" E 119˚55'21.3" with a depth of 5.76 m and the constituent material is shale in fresh condition. Mitigation that can be done is structural mitigation.
Analysis of Sun Protection Factor (SPF) values of Shallot Leaf Extract using UV-Vis Spectroscopy Method Hajra Hajra; Jumardin Jumardin; Ihsan Ihsan
Media Ilmiah Kesehatan Indonesia Vol. 4 No. 1 (2026): JANUARY
Publisher : Pakis Journal Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58184/miki.v4i1.823

Abstract

A study has been conducted on measuring the sun protection potential of red onion leaf extract with the percentage of pigmentation transmission (%Tp), erythema transmission (%Te), and Sun Protection Factor (SPF) using the UV-Vis Spectrophotometry method. The purpose of this study was to classify the sun protection potential categories of shallot leaf extract. The sunscreen ability test was determined by the calculation method of erythema transmission, pigmentation transmission, and SPF in the wavelength range of 290-320 nm with a distance of 5 nm. From the test, the concentrations of 400 ppm, 600 ppm, 800 ppm, and 1000 ppm were obtained which were included in the Extra Protection category for pigmentation based on the values ​​(%Tp) which were 63.70%, 60.15%, 46.15%, and 47.45%, respectively, all of which were in the Extra Protection category (42 – 86%). The erythema values ​​for each were 63.57%, 59.14%, 45.96%, and 47.31%, respectively. The SPF values ​​were categorized as Minimal Protection with values ​​at concentrations of 400 ppm (1.903), 600 ppm (2.219), 800 ppm (3.284), and 1000 ppm (3.161). The UV protection effectiveness of shallot leaf extract was highly sensitive to pH changes and reached optimum conditions at a pH close to neutral, around 7.07.
Co-Authors Ahmad Albar Ayu Hardianti Mahmud Ayusari Wahyuni Ayusari Wahyuni Bergita GM Saka Hajra Hajra Hernawati Hernawati Hernawati Hernawati Ibrahim Adhyatma Ismail Jumardin Jumardin Khaerunnisa A Muh Said Lanto Muh. Said L Novita Suherman Nurul Amalia Prasepvianto Estu Broto Rahmaniah Rahmaniah Rahmaniah Rahmaniah Rahmaniah, Rahmaniah Resky Perdana Yanti Risnawati Risnawati Sahara Sahara T, Muh. Asrianto Tajudin, Suaib