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All Journal Teknosains: Media Informasi Sains dan Teknologi Techno: Jurnal Penelitian Jurnal Fisika dan Terapannya
Sahara Sahara
UIN Alauddin Makassar
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Physics

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IDENTIFIKASI LITOLOGI PADA DAERAH PANAS BUMI MENGGUNAKAN METODE RESISTIVITY KONFIGURASI WENNER-SCHLUMBERGER DI DESA GALUNG KABUPATEN BARRU Ilyas, Mohamad; Sahara, Sahara; Wahyuni, Ayusari
JFT : Jurnal Fisika dan Terapannya Vol 4 No 1 (2017): Juni
Publisher : Universitas Islam Negeri Alauddin Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (564.756 KB) | DOI: 10.24252/jft.v4i1.10259

Abstract

Sub-surface analysis has been conducted to find out the lithology which includes the structure, the type of rock and the thickness of the geothermal layer of geothermal resources by using the geoelectric configuration method of Wenner-Schlumberger in Kalompie Hamlet, Galung Village, Barru sub-District, Barru District. The working principle of the geoelectric method is performed by injecting an electric current to the ground surface through a pair of current electrodes and measuring the potential difference with another pair of electrodes. The research was conducted in three trajectories with a trajectory length of 105 m and a spacing of 7 m electrodes. The result of the data interpretation was obtained by three materials that is sandy soil with resistivity value 0,095 - 4,05 Ωm have thickness 1 - 12 m, tuffed sandstone with resistivity value 4,05 - 39,7 Ωm having thickness 10 - 14 m, with a resistivity value of 39.7 - 547 Ωm with a thickness of 5 - 15 m, this rock is suspected as a rock cover on Kalompie hot water source area because it has a difficult nature to pass water (impermeabel). The geological structures of fault, anticline and syncline are not found in this research because the measurement path does not cut or pass through the path of geological structure.
UJI KUALITAS BIOBRIKET CAMPURAN TEMPURUNG KELAPA, TONGKOL JAGUNG, DAN SEKAM PADI DENGAN TEPUNG SAGU SEBAGAI PERAKAT Muhlis, Ahmad Marzuki; Sahara, Sahara; Fuadi, Nurul
JFT : Jurnal Fisika dan Terapannya Vol 6 No 1 (2019): Juni
Publisher : Universitas Islam Negeri Alauddin Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (640.953 KB) | DOI: 10.24252/jft.v6i1.12736

Abstract

Research has been carried out with the title of the biobriquette quality mixture of coconut shell, corn cobs, and rice husk with sago flour as adhesive. The purpose of this study was to determine the quality of the bio-briquettes with a mixture of coconut shells, corn cobs and rice husks with sago flour as an adhesive. In this study the raw material used was coconut shell with the process of drying at temperatures of 3500C, corn cobs with a temperature of 1500C and rice husks with a temperature of 1200C with the composition used was 60%: 20%: 20%, 60%: 25%: 15%, 60%: 30%: 10% and 60%: 35%: 5% then sieving particle size for all 40 mesh samples, mixing using 3 grams of sago flour as bio-briquette adhesive, then bio-briquette printing and drying is done. Furthermore testing of compressive strength, moisture content, ash content, calorific value and combustion time with the results of compressive strength testing using the tool. TA.XTPlus Texture Analyzer the best characteristics obtained in the composition 60%: 35%: 5% with a value of 9.82 kg /cm2, and the best characteristic moisture content was tested in the composition of 60%: 30%: 10% with a value of 4.59%. The quality produced from the biobriquette mixture of coconut shell, corn cobs, and rice husk with sago flour as adhesive can be categorized as good. This is seen from the testing of water content, ash content and calorific value that meets the Indonesian national standard and the burning time of 152.18 minutes, except for compressive strength testing that does not equal to the quality standards of Indonesia.
IDENTIFIKASI LAPISAN RAWAN LONGSOR MENGGUNAKAN METODE GEOLISTRIK RESISTIVITAS KONFIGURASI WENNER SCHLUMBERGERDI DESA PANA KECAMATAN ALLA KABUPATEN ENREKANG Taufik, Muh.; Sahara, Sahara; Wahyuni, Ayusari
JFT : Jurnal Fisika dan Terapannya Vol 4 No 2 (2017): Desember
Publisher : Universitas Islam Negeri Alauddin Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (624.815 KB) | DOI: 10.24252/jft.v4i2.10255

Abstract

Has conducted research on landslide-prone layer in Pana village Alla subdistrict of Enrekang regency. This research aims to determine the subsurface structure in Pana village Alla subdistrict of Enrekang regency and to determine the potential landslides based of rock layers in Pana village Alla subdistrict of Enrekang regency. In this research measurements were performed using geolistrik resistivity method configuration of Wenner-Schlumberger. Measurements were taken at 5 tracks with the lenght of each track is 75 m with each electrode spacing is 5 m for each track. The result of data processing showed that 5 tracks composed of a layer of soil with plenty of water accumulation, with resistivity value of 0,169 Ωm-13,7 Ωm, a layer of shale in weather conditions with resistivity value of 4,16 Ωm-41,3 Ωm and a layer of shale in fresh condition with resistivity value of 41,3 Ωm-1141 Ωm. Futhermore, the track is concidered prone to landslide are track 3, track 4 and track 5. These predictions are because on the third track suspected slip surface with resistivity value of 29,7 Ωm-37,9 Ωm.
PENGEMBANGAN KOMPOSIT PANEL AKUSTIK BERBAHAN DASAR BIJI DAN KULIT KAPUK RANDU UNTUK MENINGKATKAN KOEFISIEN ABSORBSI BAHAN Sahara Sahara; Amirin Kusmiran
Teknosains Vol 15 No 2 (2021): Mei-Agustus
Publisher : Fakultas Sains dan Teknologi Universitas Islam Negeri Alauddin Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24252/teknosains.v15i2.20176

Abstract

Cangkang dan biji Ceiba pentandra berpotensi menjadi sampah organik jika sampah tersebut tidak dikelola dengan baik. Dampak negatif dari cangkang dan biji Ceiba pentandra merugikan lingkungan yaitu pencemaran air dan udara. Masalah ini dapat diatasi dengan mengolah sampah menjadi material yang bernilai ekonomis yaitu panel akustik dari material alam. Selain itu, penggunaan panel akustik untuk mengurangi polusi udara dari gelombang suara. Pembuatan bahan baku tersebut dilakukan dengan teknik hand lay-up dengan menggunakan polimer poliester sebagai matriks dan cangkang dan biji sebagai serat. Bahan baku pabrikan telah dikeringkan selama 10 jam untuk mendapatkan pemadatan panel akustik yang optimal. Untuk mengetahui koefisien absorpsi panel akustik dilakukan pengukuran kebisingan dari panel akustik berbahan cangkang, biji kasar dan halus Ceiba pentandra, baik tanpa aluminium foil maupun dengan aluminium foil. Pengaruh jarak terhadap penyerapan suara dari berbagai sampel juga dilakukan. Hasil penelitian menunjukkan bahwa koefisien serap tertinggi pada sampel dengan biji Ceiba petandra adalah 0,356 dengan aluminium foil sedangkan tanpa aluminium foil adalah 0,255, koefisien serap tertinggi pada sampel dengan kulit Ceiba pentandra adalah 0,435 dengan aluminium foil sedangkan tanpa aluminium foil adalah 0,35. dan koefisien serap tertinggi pada sampel dengan biji Ceiba pentandra adalah 0,427 dengan aluminium foil sedangkan tanpa aluminium foil adalah 0,272. Dengan demikian, penambahan aluminium foil dapat meningkatkan koefisien penyerapan panel akustik.
ANALISIS NILAI ABSORBANSI KADAR FLAVONOID TANAMAN HERBAL MENGGUNAKAN SPEKTROFOTOMETER UV-VIS Anita Purnamasari; Sri Zelviani; Sahara Sahara; Nurul Fuadi
Teknosains Vol 16 No 1 (2022): Januari-April
Publisher : Fakultas Sains dan Teknologi Universitas Islam Negeri Alauddin Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24252/teknosains.v16i1.24185

Abstract

Flavonoid merupakan metabolit sekunder dari polifenol yang banyak ditemukan pada tumbuhan dan makanan serta memiliki aktivitas biologis. Kadar flavonoid dapat diukur dengan mengetahui nilai absorbansi pada panjang gelombang tertentu berdasarkan prinsip Lambert-Beer dari setiap tanaman herbal menggunakan spektrofotometer UV-Vis. Tujuan penelitian ini adalah untuk mengetahui kadar flavonoid ekstrak daun sirih merah, daun kembang sepatu dan ekstrak daun kapuk. Proses ekstraksi kandungan kimia dan daun sirih daun waru dan daun kapuk dilakukan dengan metode maserasi menggunakan etanol 70%. Hasil peneltian menunjukkan bahwa kandungan flavonoid total daun sirih merah, daun kembang sepatu dan daun kapuk adalah sebesar 1,18131%, 1,4445% dan 1,2985%. Sehingga dapat disimpulkan bahwa kandungan flavonoid tertinggi dimiliki oleh daun sirih merah dengan nilai sebesar 1,8131%.
Characterization of Rock Composing Minerals Using the X-Ray Diffraction Method at the Samaenre-Mallawa Hot Spring, Maros Regency Yuliana Nengsih; Sahara Sahara; Ayusari Wahyuni
TECHNO: JURNAL PENELITIAN Vol 10, No 2 (2021): Techno Jurnal Penelitian
Publisher : Universitas Khairun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33387/tjp.v10i2.2898

Abstract

One of the areas in Maros Regency that has geothermal potential is located in Samaenre, Mallawa District, where the hot springs are located a few kilometers from residential areas. This hot water is a source located around the river. Hot springs are springs that are produced as a result of the discharge of groundwater from the earth's crust after being heated geothermal. Research has been carried out that aims to determine the mineral content around hot springs and determine crystal structure around the hot springs by using the X-Ray Diffraction method. Samples were obtained from a depth of 1 meter at points A, B, C, D and E. XRD test results showed that the mineral content was silicon oxide, kaolinite, magnetite, calcium peroxide, Dobassite-2M1a, alpha-SiO2, Calcium Peroxide, Maghemite-Q , Aragonite, Paragonite 2M1, Gehlenite, UTD-1, Silicon Oxide, Pyrophyllite 1A dehydroxylated, Paragonite 3T, and UTD-1. Most of the five samples are silicon oxide minerals. The crystal structures seen are tetragonal CaO2, Fe2O3, (Ca2 (Al0.92 Mg0.08) ((AlO.92), orthorhombic Ca (CO3), Si112 O224, Si O2, hexagonal SiO2, Na Al2 (Al Si3 O10) ( OH)2, monoclinic Al4.5 (Al8.5Si3.2) O10(OH)8, NaAl2 ((AlSi3) O10 (OH)2, triclinic Al4(OH)8(Si4O10), Al4Si2 O22 and cubic Fe3O4.
PENGARUH VARIASI KETEBALAN DAN NILAI KOEFISIEN ABSORBSI UNTUK CACAHAN HALUS DAN CACAHAN KASAR PAPAN AKUSTIK DARI BATANG KELOR (MORINGA OLEIFERA LAM) Fitria Jasman; Sahara Sahara; Muh Said L; Hernawati Hernawati
JFT : Jurnal Fisika dan Terapannya Vol 8 No 2 (2021): DESEMBER
Publisher : Universitas Islam Negeri Alauddin Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24252/jft.v8i2.23557

Abstract

This study aims to determine the effect of thickness on the absorption coefficient of the acoustic board made from Moringa stems (Moringa Oleifer Lam). The method used in this research is to make an acoustic board with two types of samples, namely finely chopped samples and coarse chopped samples with a thickness of 0.70 cm, 1.00 cm and 1.20 cm, and measuring the absorption coefficient with variations in the thickness of the acoustic board. The frequency values used are 300 Hz, 500 Hz, 750 Hz, 900 Hz, 1000 Hz and 3000 Hz. Based on the results of the study, it was found that the sound absorption coefficient of acoustic material with variations in thickness indicated that the finely chopped and coarsely chopped samples had an effect on increasing the thickness of a sample, where the thicker the sample, the lower the absorption coefficient value. That meets ISO standards sound absorption coefficient value for fine pieces is at a frequency of 500 Hz with an absorption coefficient of 0.35, 0.30, and 0, 019, for 500 Hz with absorption coefficients 0.34, 0.27, and 0.30 while for 900 Hz the absorption coefficient values are 0.32, 0.24, and 0.20.
ANALISIS PEMETAAN ZONA KONSERVASI AIR TANAH DI PROVINSI SULAWESI SELATAN MENGGUNAKAN APLIKASI QGIS Abu Ammar; Askar; Abd. Munir HB; Sahara
JFT : Jurnal Fisika dan Terapannya Vol 9 No 1 (2022): JUNI
Publisher : Universitas Islam Negeri Alauddin Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24252/jft.v9i1.26495

Abstract

This study is titled Mapping Analysis of Groundwater Conservation Zones in South Sulawesi Province Using QGIS Application. This study aims to digitize the map of groundwater conservation zones in 13 regencies/cities in South Sulawesi Province and to find out the division of groundwater conservation zones in 13 regencies / cities in South Sulawesi while calculating the area of each zone. The method used in this study is to use data processing methods, where secondary maps in jpeg form are digitized and then analyzed to obtain results in the form of zone division and area of each zone. From the results of research that has been obtained, there are 5 types of groundwater conservation zones, namely critical zones, rare zones, vulnerable zones, safe zones, and addition zones. In 13 regencies/cities in South Sulawesi Province the most extensive zone is a safe zone with an area of 818912.42 hectares. However, the second largest zone (59626,923 hectares) is a vulnerable zone where in this zone can no longer absorb properly. For this reason, there needs to be a preventive way to overcome the problem.
PENGUJIAN KOEFISIEN ABSORBSI PADA PAPAN AKUSTIK MENGGUNAAN BAHAN DASAR BATANG JAGUNG DENGAN PEREKAT RESIN POLYESTER Ayu Hardianti Mahmud; Ihsan Ihsan; Sahara Sahara
JFT : Jurnal Fisika dan Terapannya Vol 7 No 2 (2020): DESEMBER
Publisher : Universitas Islam Negeri Alauddin Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24252/jft.v7i2.13830

Abstract

This study aims to determine the effect of thickness variations on the sound absorption coefficient of acoustic material from corn stalks. The study was conducted by making acoustic board samples from corn stems with Polyester Resin adhesive. In this study the thickness of the acoustic boards used were 0.7 cm, 1 cm, and 1.5 cm. The amount of frequency used is 250 Hz, 500 Hz, 1000 Hz, 2000 Hz. Based on the results of the research, the absorption coefficient value is proportional to the thickness, where the greater the thickness of a material, the lower the coefficient value produced. In the thickest sample with a thickness of 1.5 cm for a frequency of 250 Hz, the absorption coefficient value is 0.177, while at the frequency of 2000 Hz the absorption coefficient value is 0.084.
PENGARUH TEGANGAN TABUNG (kV) PADA PEMERIKSAAN THORAX TERHADAP KUALITAS CITRA RADIOGRAFI DI BALAI BESAR KESEHATAN PARU MASYARAKAT MAKASSAR Fitriani Fitriani; Sri Zelviani; Sahara Sahara
JFT : Jurnal Fisika dan Terapannya Vol 7 No 2 (2020): DESEMBER
Publisher : Universitas Islam Negeri Alauddin Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24252/jft.v7i2.18067

Abstract

This study aims to determine the effect of high voltage usage and standards on the quality of radiographic imagery produced on X-ray aircraft. Data retrieval was obtained by conducting testing in the Radiology Installation room of the Makassar Public Lung Health Center by using an X-ray aircraft of thosiba brand type with drx-1824B model unit. The result obtained is the voltage of the tube gives an influence on the quality of radiography imagery where for the use of standard tube voltage provides good radiographic imagery quality results with a graph reading histogram voltage of 50 kV with a distance of 100 cm and a time of 10 mAs with a black background image starting at the position of 16 to 36 and the position of the object is 37 to 79 which is then able to provide information because the edges of the object and background can still be distinguished clearly and for the high voltage used the result is less tub because it can reduce the contrast value of objects and background is indistinguishable, this is seen in the histogram readings voltage of 90 kV and distance of 100 cm and the time of 10 mAs has a gradation of gray color that dominates compared to the black background whose position starts from 10 to 132 which can not provide information on the edge value between the background and the object phantom water because both seem to be fused so that it is indistinguishable and causes an inadequate image contrast Not good enough.
Co-Authors Abd. Munir HB Abu Ammar Amirin Kusmiran Anita Purnamasari Askar Ayu Hardianti Mahmud Ayusari Wahyuni Basmanto Basmanto Fitria Jasman Fitriani Fitriani Hernawati Hernawati Hernita Sapitriani Ihsan Ihsan Ilyas, Mohamad Jasdar Agus Muh. Said L Muh. Taufik Muhlis, Ahmad Marzuki Nurfadhilah jusman Nurul Fuadi Wahyuni, Ayusari Yuliana Nengsih Zelviani, Sri Zulfaniar