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Universitas Negeri Makassar Jl. AP Pettarani Makassar Sul-Sel Telpon: 869834-869854-860468; 081328540086; Fax: 0411-868794-868879
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INDONESIA
Indonesian Journal of Fundamental Sciences
Published by Universitas Negeri Makassar
ISSN : 2621671X     EISSN : 26216728     DOI : 10.26858/ijfs
Core Subject : Health, Science, Social, Engineering,
Chemical Engineering, Chemistry & Bioengineering Computer Science & IT Electrical & Electronics Engineering Energy Engineering Environmental Science Immunology & microbiology Materials Science & Nanotechnology Mechanical Engineering Medicine & Pharmacology Physics
Scopes of the journal consist of: 1. Mathematics, 2. Physics, 3. Chemistry, 4. Biology, 5. Statistics, and 6. Engineering.
Arjuna Subject : Umum - Umum
Articles 7 Documents
 1 
Search results for , issue "Vol 11, No 1 (2025)" : 7 Documents clear
PHOTODEGRADATION OF METHYL ORANGE USING TiO2 CATALYST SUPPORTING POROUS CERAMIC Taufiq, Muhammad; Hasri, Hasri; Pratiwi, Diana Eka; Rahman, Abd; Putri, Suriati Eka
Indonesian Journal of Fundamental Sciences Vol 11, No 1 (2025)
Publisher : Universitas Negeri Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26858/ijfs.v11i1.73357

Abstract

The purpose of this study was to determine the effect of initial pH and concentration of methyl orange (MO) dye solution on the photodegradation process using a TiO2 catalyst impregnated into porous ceramics. This research is an experimental research consisting of several stages, namely; preparation  of Pinrang natural clay  samples, synthesis of porous ceramics using the gelcasting method, impregnation of TiO2 catalysts into porous ceramics by  the sol-gel coating method, and analysis of the influence of initial pH and concentration of MO dyes on photodegradation using impregnated TiO2 catalysts in porous ceramics. The analysis of the effect of the initial pH showed that the higher the pH of the MO dye, the lower the percentage of dye degradation as well as the concentration value, the higher the MO concentration value, the lower the percentage of dye degradation. The optimum degradation was obtained at pH 3 and a concentration of 10 ppm with a degradation percentage of 75.15%.
Characteristics of Cellular Lightweight Concrete Bricks Using Rice Husk Ash and Nickel Slag Waste Ahmad, Irma Aswani; Taufieq, Nur Anny Suryaningsih; Pertiwi, Nurlita
Indonesian Journal of Fundamental Sciences Vol 11, No 1 (2025)
Publisher : Universitas Negeri Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26858/ijfs.v11i1.73756

Abstract

Abstract. The construction industry increasingly demands environmentally sustainable materials that reduce dependency on non-renewable resources. This study investigates the potential of rice husk ash (RHA) as a partial cement substitute and nickel slag as a fine aggregate replacement in the production of Cellular Lightweight Concrete (CLC) bricks. Both materials are industrial and agricultural wastes rich in silica, offering chemical and physical properties suitable for lightweight concrete applications. The research aims to evaluate the compressive strength of CLC bricks by incorporating RHA and nickel slag, with a particular focus on the influence of sand fineness. Three levels of sand gradation were tested, corresponding to Zone 2 (coarser), Zone 3, and Zone 4 (finest) based on sieve analysis. Specimens were cast and tested under standard conditions to assess their mechanical performance. The results indicate that sand fineness significantly affects the compressive strength of the bricks. Zone 2 sand produced the highest compressive strength (0.21 MPa), followed by Zone 4 (0.15 MPa) and Zone 3 (0.08 MPa). The decline in strength with finer sand is attributed to increased porosity and reduced interparticle friction, which disrupts bonding within the matrix. Furthermore, characterization results confirm that nickel slag fulfills the physical requirements of fine aggregates. This study demonstrates that combining RHA and nickel slag in CLC bricks is feasible and can support the development of more sustainable, non-structural construction materials with optimized mechanical performance. Keywords: CLC, rice husk ash, nickel slag, compressive strength, sand fineness
Development of Microcontroller Arduino Atmega2560 Based Bluetooth Controlled Trash Can and Vacuum Cleaner Robot Zainuddin, Zainuddin
Indonesian Journal of Fundamental Sciences Vol 11, No 1 (2025)
Publisher : Universitas Negeri Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26858/ijfs.v11i1.74011

Abstract

Abstract. This study aims to develop a Bluetooth controlled trash and vacuum cleaner robot based on the Arduino ATmega2560 microcontroller and to discover the responses of users after using the tool. The type of this study is research and development (R&D) with an experimental development model. The types of data obtained in this study are qualitative data and quantitative data using data collection instruments in a form of a questionnaire. Data analysis techniques employed descriptive statistical analysis technique. The results of the tests that had been conducted by the Bluetooth module, it can be concluded that Bluetooth can be connected to the trash robot at an optimal distance of 35 meters in an open area without obstructions and an optimal distance of 20 meters in a closed room. The results of testing the tool in terms of the functionality factor by using the trial-and-error test method obtained responses from two expert validators that are suitable for field trials. The results of the usability factor test were obtained from the responses of 30 respondents who interacted with the tool, the percentage of achievement is 89% or very feasible so that the tool that had been developed receive a good response from users. Keywords: robot, trash can, vacuum cleaner, microcontroller
Penentuan Kadar Fenolik Total dan Aktivitas Antioksidan Ekstrak n-heksan Kulit Buah Srikaya (Annona squamosa L.) Menggunakan Metode DPPH Aulia, Vena; Faika, Sitti; Salempa, Pince
Indonesian Journal of Fundamental Sciences Vol 11, No 1 (2025)
Publisher : Universitas Negeri Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26858/ijfs.v11i1.74338

Abstract

Abstrak. Penelitian ini bertujuan untuk mengetahui kandungan senyawa fenolik dan flavonoid dalam ekstrak metanol dan n-heksan kulit buah srikaya, menentukan kadar total senyawa fenolik dan flavonoid, serta mengukur aktivitas antioksidan masing-masing ekstrak berdasarkan nilai IC₅₀ menggunakan metode DPPH. Penelitian ini merupakan penelitian eksploratif yang meliputi tahapan penyiapan sampel, preparasi, ekstraksi, uji pendahuluan, partisi, analisis kadar total fenolik dan flavonoid, serta pengujian aktivitas antioksidan. Hasil penelitian menunjukkan bahwa ekstrak metanol memiliki kadar fenolik total, flavonoid total, dan aktivitas antioksidan yang lebih tinggi secara berturut-turut dibandingkan ekstrak n-heksan, yaitu masing-masing sebesar 80,1623 ± 1,66 mg GAE/g, 38,8624 ± 0,2356 mg QE/g, dan 59,445 ± 0,69 μg/mL. Sedangkan ekstrak n-heksan sebesar 21,5339 ± 1,66 mg GAE/g, 12,7098 ± 0,5996 mg QE/g, dan 106,893 ± 0,31 μg/mL. Penelitian ini menunjukkan bahwa semakin tinggi kadar fenolik dan flavonoid total pada kulit buah srikaya, maka semakin tinggi pula aktivitas antioksidannya. Kata Kunci: Senyawa Fenolik, Flavonoid, Ekstrak Metanol
Minimization of Nickel Slag Waste as an Alternative Gravel Material in Green Concrete Mixtures Taufieq, Nur Anny Suryaningsih; Ahmad, Irma Aswani; Pertiwi, Nurlita
Indonesian Journal of Fundamental Sciences Vol 11, No 1 (2025)
Publisher : Universitas Negeri Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26858/ijfs.v11i1.72940

Abstract

Abstract. The main issue addressed in this study is the use of environmentally unfriendly concrete materials, such as gravel, which is a non-renewable resource. In addition, the production of cement used in concrete also contributes to air pollution. Therefore, innovation in more environmentally friendly construction materials is necessary, one of which involves using nickel slag waste as a partial replacement for coarse aggregates in green concrete. The proposed solution is the utilization of nickel slag, a by-product from the nickel smelting industry, as an alternative material to replace gravel in green concrete mixtures. This study aims to determine the optimum percentage of nickel slag as a substitute for gravel that can produce concrete with sufficient strength while maintaining environmental friendliness. The methods used in this research include testing the physical and chemical characteristics of nickel slag, producing concrete specimens with varying percentages of nickel slag, and conducting mechanical property tests such as compressive strength and slump tests to assess the performance of the resulting green concrete. The results show that using up to 50% nickel slag as a replacement for gravel in green concrete leads to a decrease in compressive strength, although the reduction is not significant. Additionally, the use of nickel slag can reduce the environmental impact of the construction industry by utilizing waste that had previously been underutilized. The application of nickel slag as a partial replacement for coarse aggregates in green concrete offers a promising solution for creating more sustainable construction materials. Keywords: green concrete, nickel slag, coarse aggregate, compressive strength, environmentally friendly
Kelayakan Mata Air Sebagai Sumber Air Minum di Desa Kambani dan Tatabau Kecamatan Buko Selatan Kabupaten Banggai Kepulauan Tuyu, Krisman
Indonesian Journal of Fundamental Sciences Vol 11, No 1 (2025)
Publisher : Universitas Negeri Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26858/ijfs.v11i1.76026

Abstract

Abstrak. Penelitian ini bertujuan untuk mengetahui kelayakan kualitas air mata air berdasarkan parameter fisika dan mikrobiologi di Desa Kambani dan Desa Tatabau. Selain itu untuk mengetahui apakah hasil yang diperoleh telah sesuai dengan standar baku mutu air minum. Penelitian ini termasuk jenis penelitian deskriptif laboratoris, dengan populasi air dari mata air di Desa Kambani dan Desa Tatabau. Sampel air diambil dari mata air yang berbeda ketinggiannya dengan menggunakan teknik pengambilan purposive random sampling. Metode pengumpulan data yang digunakan yaitu metode observasi dan metode dokumentasi. Teknik analisis data dilakukan dengan membandingkan hasil analisis parameter fisika, kimia, dan mikrobiologi yang dilakukan di Laboratorium Kesehatan Dinas Kesehatan Kabupaten Banggai dengan standar kualitas baku mutu air bersih. Hasil analisis kualitas air seperti warna, kekeruhan, total zat terlarut, pH, Nitrit (NO2), Nitrat (NO3), besih (Fe), Kromium (Cr) dan Mangan (Mn) secara keseluruhan di bawah standar baku mutu Kesehatan lingkungan untuk air minum sesuai dengan Peraturan Menteri Kesehatan Nomor 2 Tahun 2023 tentang Peraturan Pelaksanaan Peraturan Pemerintah Nomor 66 Tahun 2014 tentang Kesehatan Lingkungan. Dengan demikian air dari mata air di Desa Kambani dan Desa Tatabau Kecamatan Buko Selatan dapat digunakan sebagai air minum. Oleh karena itu, air dari mata air ini dapat dilakukan pendistribusian pada rumah-rumah warga pada kedua desa tersebut melalui Program Air Minum dan Sanitasi berbasis Masyarakat. Kata Kunci: Mata Air, Kualitas Air, Air Minum
Substitusi Konsentrat dengan Tepung Maggot Black Soldier Fly (Hermetia Illucens) dalam Ransum Terhadap Kualitas Interior Telur Ayam Ras Petelur Mihrani, Mihrani; Ardana, A.T.P.
Indonesian Journal of Fundamental Sciences Vol 11, No 1 (2025)
Publisher : Universitas Negeri Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26858/ijfs.v11i1.76187

Abstract

Abstrak. Riset ini bertujuan untuk mengetahui kualitas internal telur ayam ras petelur dengan substitusi tepung maggot bsf untuk mengetahui indeks putih telur, indeks kuning telur, warna kuning telur dan Haugh Unit. Riset dilakukan dengan metode Rancangan Acak Lengkap (RAL) dengan 4 perlakuan dan 4 ulangan. Perlakuan yang diberikan terdiri dari P0 (Tanpa substitusi Tepung Maggot BSF (Kontrol)), P1 (Substitusi 5% Tepung Maggot BSF), P2 (Substitusi 10% Tepung Maggot BSF) dan P3 (Substitusi 15% Tepung Maggot BSF). Evaluasi penyuluhan yang dilakukan adalah evaluasi awal dan evaluasi akhir. Hasil riset ini menunjukkan bahwa dengan substitusi tepung maggot bsf yang signifikan akan memberikan pengaruh terhadap hasil yang diperoleh. Tepung maggot bsf dengan substitusi 15% kedalam ransum memberikan kualitas terbaik terhadap indeks putih telur, indeks kuning telur, warna kuning telur dan Haugh Unit

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