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All Journal Jurnal Neutrino : jurnal fisika dan aplikasinya Teknosains: Media Informasi Sains dan Teknologi Neutrino Jurnal Fisika dan Terapannya Jurnal Pertambangan dan Lingkungan
Hernawati Hernawati
Department Of Physics, Science And Technology Of Faculty, Universitas Islam Negeri Alauddin Makassar Jl. H.M. Yasin Limpo 36 Gowa 92118
Agriculture, Biological Sciences & Forestry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Education Engineering Environmental Science Physics

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NILAI PERBANDINGAN UJI FISIS DAN MEKANIK PAPAN KOMPOSIT DENGAN MENGGUNAKAN BAHAN DASAR ORGANIK Maulida Ilyas; Hernawati Hernawati
Teknosains Vol 13 No 1 (2019): JANUARI
Publisher : Fakultas Sains dan Teknologi Universitas Islam Negeri Alauddin Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24252/teknosains.v13i1.7829

Abstract

Telah dilakukan penelitian perbandingan uji fisis dan mekanik papan komposit dengan menggunakan bahan dasar organik untuk mengetahui metode yang digunakan dalam pembuatan papan komposit dari bahan organic dan mengetahui bahan organik yang paling baik untuk dijanikan sebagai bahan papan komposit. Sampel yang digunakan sebagai bahan dasar organik pembuatan papan komposit yaitu kulit singkong, batang pandan, kayu akasia, bambu kuning, serbuk gergaji kayu, sekam padi, limbah kayu industri, bambu hutan, sabut kelapa, dan daun jambu dengan menggunakan berbagai jenis bahan perekat yang bervariasi. Papan komposit dengan kualiatas terbaik ada papan yang terbuat dari kayu Akasia dengan campuran Phenol Formaldehyde denganhasil pengujian nilai uji daya serap air, uji elastisitas, kerapatan, modulus patah, keteguhan rekat, dan kuat pegang sekrup pada papan komposit dengan bahan dasar kulit singkong secara berurut adalah 34,35%, 57116,34 Kg/cm2, 0,7453 gr/cm3, 473,4539 kg/cm2, 9,0261 kg/cm2, dan 118,1140 Kg.
SINTESIS DAN ANALISIS HASIL UJI KARBON AKTIF BERBAHAN DASAR ORGANIK YANG BERBEDA-BEDA Ainun Jariah; Hernawati Hernawati
Teknosains Vol 13 No 2 (2019): JULI
Publisher : Fakultas Sains dan Teknologi Universitas Islam Negeri Alauddin Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24252/teknosains.v13i2.7833

Abstract

Tujuan dari penelitian ini yaitu Untuk mengetahui perbandingan nilai kadar air dan nilai daya serap terhadap yodium dari bahan organic berbeda-beda, Untuk mengetahui bahan organik yang menghasilkan karbon aktif yang sesuai dengan SNI. Metode yang digunakan pada penelitian ini yaitu metode studi literatur menggunakan sepuluh jurnal yang berkaitan dengan penelitian sebagai sumber rujukan. Secara umum, penelitian dimulai dengan proses dehidrasi,kemudian proses karbonisasi dan diakhiri dengan proses aktivator. Dari hasil yang dipeoleh bahan organik yang paling baik untuk sintesis karbon aktif yang memenuhi SNI adalah ampas kopi dengan nilai kadar air sebesar 3,29% dan daya serap terhadap yodium sebesar 750,24 mg/g.
Identifikasi Air Tanah Menggunakan Metode Resistivitas: Studi Kasus Desa Bonto Baddo, Kecamatan Bonto Rammba, Kabupaten Gowa Ayusari Wahyuni; Sri Selviani; Ahmad Huzaifa; Hernawati Hernawati; Bergita Gela M. Saka
Neutrino Vol 3 No 2 (2020)
Publisher : Publikasi dan UKI Press UKI Toraja.

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Telah dilakukan penelitian identifikasi air tanah menggunakan metode resistivitas di desa Bonto Baddo, kecamatan Bonto Rammba, kabupaten Gowa Sulawesi Selatan untuk mengetahui lokasi air tanah di sekitar wilayah perkebunan dengan menggunakan konfigurasi shclamberger dan konfigurasi wenner. Setelah dilakukan penelitian dengan metode resistivitas (tahanan jenis) ditemukan lokasi air tanah pada kedalaman 12,9 meter dengan nilai resistivitas 0,177 ?m yang terletak pada lintasan pertama. Secara keseluruhan hasil interpretasi struktur lapisan di bawah permukaan adalah berupa pasir, lempung dan air tanah.
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.
CORN HAIR EXTRACT AS CORROSION INHIBITOR FOR ST37 STEEL IN 3% HCL MEDIA Sefrilita Risqi Adikaning Rani; Rahmaniah Rahmaniah; Hernawati Hernawati; Nurhidayah Nurhidayah; Fira Yurdanianti
Jurnal Neutrino:Jurnal Fisika dan Aplikasinya Vol 15, No 2 (2023): APRIL
Publisher : Department of Physics, Maulana Malik Ibrahim State Islamic University of Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18860/neu.v15i2.17279

Abstract

The research aims to analyze the impact of the concentration of the extracted corn hair inhibitor and the immersion time in reducing the formation of pitting corrosion with or without cracks of ST37 steel. The mass loss method and SEM analysis were applied used in this study to provide a reliable and accurate measurement of the inhibitor's effectiveness due to the corrosion formation. The results indicated that both concentrations of the inhibitor and the immersion time significantly impacted the morphological characteristics of the ST37 steel through the reduction of various types of corrosion. It indicated that the immersion time and the corrosion inhibitor concentration were related to the corrosion rate. The longer the sample was immersed, the greater the mass loss that occurred because the more Fe(OH)2 layers were formed. While the higher the concentration of inhibitor used, the lower the corrosion rate by hindering the diffusion of corrosion media to the surface of the sample. The results also indicated that the test of morphological characteristics of ST37 steel shows four types of corrosion formed such as stress, uniform, pitting, and pitting corrosions. Overall, this research demonstrates the potential use of corn hair extracted from waste material as an effective inhibitor for reducing the corrosion rate of ST37 steel. The findings of the research could have important implications in developing new sustainable corrosion inhibitors for the future manufacture of corn hair inhibitors in reducing the corrosion rate of ST37 steel.
PENGARUH PENAMBAHAN PATI DAN PLASTICIZER GLISEROL TERHADAP SIFAT MEKANIK PLASTIK BIODEGRADABLE Sitti Nurrahmi; Sity Nuraisyah; Hernawati Hernawati
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.v7i2.18267

Abstract

Biodegradable plastics are plastics that will decompose  in nature with the help of microorganisms. The use various of starch as the main material of plastic manufacturing has great potential because in Indonesia there are different starch crops. To obtain bioplastics, starch is added to the plasticizer glycerol, in order to obtain a more flexible plastic and elastic. This study reviews  the  use  of starch to obtain good mechanical properties of biodegradable plastics. Addition various of starch affecting the mechanical properties of biodegradable plastics. But, addition of plasticizer  glycerol on many kinds of starch lower the value of tensile strength and raising the value of elongation. But, when added chitosan and glycerol, increasing the value of tensile strength and lower the value of elongation.
STUDI PENGUJIAN PARAMETER FISIS PADA DAUN PISANG KERING, DAUN JATI, DAN KULIT JAGUNG SEBAGAI WADAH MAKANAN Fany Aliasra; Hernawati Hernawati; Muh. Said L.
JFT : Jurnal Fisika dan Terapannya Vol 8 No 1 (2021): JUNI
Publisher : Universitas Islam Negeri Alauddin Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24252/jft.v8i1.20286

Abstract

This study aims to determine the physical quality of food containers made of dried banana leaves, teak leaves, and corn husks. The process of making a food container is carried out using a stainless steel mold which is then heated using a cooking thermometer to reach a temperature of 1000C and using a 10 kg load as a pressure, then printed for 5 minutes which is done 4 times printing for each food container. There are two tests for food containers, namely, the water absorption test, the average value of water absorption for food containers for dried banana leaves is 0.00%, 99,97% teak leaves, and 49.96% corn husks. The second test is test the resistance of the container based on temperature parameters. The temperatures used are 400C, 600C, and 800C, the three containers have different results, the dried banana leaf container can be used for hot food because it doesn't change after testing, while the food container made of leaves Teak and corn husk underwent changes during testing. Where teak leaves cannot be used for food with soup and corn husks cannot be used as food containers with food temperatures above 600 C.
Pengaruh Pemberian Gelombang Bunyi Jenis Murottal Terhadap Pertumbuhan Batang Dan Daun Pada Pembibitan Kacang Tanah (Arachis Hypogea) Zulfaniar; Hernawati; Sahara
JFT : Jurnal Fisika dan Terapannya Vol 10 No 1 (2023): JUNI
Publisher : Universitas Islam Negeri Alauddin Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24252/jft.v10i1.25502

Abstract

This study aims to determine the effect of murottal type sound waves on stem height, number of leaves and number of stalks on peanut plant growth. Using local peanut seeds with the addition of organic fertilizer, urea fertilizer and without the addition of other nutrients. The peanut seeds were treated with 4000 Hz murottal sound with different exposure times and without murottal sound exposure. Peanut seedlings were observed using a camera to obtain images and using measuring instruments to determine the growth of stems and leaves. The results showed that the difference in the effect of giving sound and without sounding could give a change in the average increase of 6 - 9 cm in stem height, the number of leaves experienced an average increase of 4 leaves while the change in the number of stalks experienced an increase of 1 stalk.
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.
Co-Authors Ahmad Huzaifa Ainun Jariah Ayusari Wahyuni Ayusari Wahyuni Bergita Gela M Saka Bergita GM Saka Fany Aliasra Fira Yurdanianti Fitria Jasman Ibrahim Adhyatma Ismail Ihsan Ihsan Maulida Ilyas Muh Said Lanto Muh. Said L Nurhidayah Nurhidayah Rahmaniah Rahmaniah Rani, Sefrilita Risqi Adikaning Sahara Sahara Sitti Nurrahmi Sity Nuraisyah Sri Selviani Zulfaniar