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All Journal Jurnal Penelitian Pendidikan IPA (JPPIPA) Jurnal SOLMA Jurdimas (Jurnal Pengabdian Kepada Masyarakat) Royal Journal of Technomaterial Physics Inovasi Fisika Indonesia (IFI) Jurnal Pemberdayaan Sosial dan Teknologi Masyarakat Jurnal BATAS Jurnal Polimesin
Zahar, Intan
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Agriculture, Biological Sciences & Forestry Astronomy Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mechanical Engineering Physics Social Sciences Other

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Effect of Annealing Temperature on Mechanical Properties of AISI 1045 Carbon Steel Moraida Hasanah; Susilawati, Susilawati; Zahar, Intan; Mulyadi, Yadi; Rahmadsyah, Rahmadsyah
Journal of Technomaterial Physics Vol. 6 No. 1 (2024): Journal of Technomaterial Physics
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jotp.v6i1.15428

Abstract

Research on the effect of of annealing temperature variations on the mechanical properties of AISI 1045 carbon steel has been conducted by varying the annealing temperatures. The samples used in this study had a diameter of 20 mm and a length of 30 mm. Since AISI 1045 steel is very important in the manufacturing industry, extensive research and development. This study aims to analyze the microstructure formed during the annealing process at different temperatures, to determine the impact of annealing temperature on the hardness values of AISI 1045 steel, and to evaluate the corrosion rate of the steel. The samples were heated in a furnace for 1 hour at temperatures of 250°C, 500°C, 750°C, and 1000°C. After removal from the furnace, the samples were returned to room temperature. Subsequently, hardness tests, corrosion rate tests, and microstructural observations were conducted using a Scanning Electron Microscope (SEM). The results indicated that a hardness of 119.3 HRC could be achieved at 500°C, and a corrosion rate of 0.0014 mm/y could be achieved at 1000°C. The values obtained from these tests, supported by the SEM observations, suggest that AISI 1045 carbon steel exhibits good mechanical properties after the annealing process.
Implementasi Teknologi Ozonisasi Untuk Meningkatkan Produksi Benih Ikan Pada Pembudidaya Ikan Mekar Jaya Kabupaten Asahan Puspitasari, Dian; Rumiati, Rumiati; Hariyani, Riska; Zahar, Intan; Purba, Deddy Wahyudin
Jurnal SOLMA Vol. 13 No. 3 (2024)
Publisher : Universitas Muhammadiyah Prof. DR. Hamka (UHAMKA Press)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22236/solma.v13i3.16382

Abstract

Pendahuluan: Kelompok pembudidaya ikan Mekar Jaya mengalami rendahnya daya tetas telur ikan akibat buruknya kualitas air dan infeksi jamur. Studi ini bertujuan untuk untuk memperkenalkan teknologi ozonisasi yang dapat membantu mitra mengatasi masalah rendahnya tingkat penetasan telur dan kualitas air dalam budidaya ikan. Metode: Sosialisasi dan pelatihan dilakukan kepada 20 peserta. Data kondisi ikan dan kualitas air dikumpulkan melalui wawancara. Implementasi teknologi ozonisasi diuji dengan memantau tingkat penetasan telur, amonia, dan oksigen terlarut (DO). Hasil: Teknologi ozonisasi meningkatkan daya tetas telur ikan hingga >80%, menghilangkan jamur, menurunkan amonia hingga 50% (0,5 mg/L), dan meningkatkan DO sebesar 25% (0,8 mg/L) dalam 20 menit. Ikan yang sakit menunjukkan perbaikan. Kesimpulan: Ozonisasi efektif meningkatkan daya tetas telur dan kualitas air, serta mendukung kesehatan ikan, sehingga meningkatkan produktivitas budidaya.
Effectiveness of Ozone Plasma Technology in Enhancing the Survival of Gourami (Osphronemus goramy) Fish Eggs Zahar, Intan; Sari, Dian Puspita; Hasanah, Moraida; Z, Fynnisa
Journal of Technomaterial Physics Vol. 7 No. 1 (2025): Journal of Technomaterial Physics
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jotp.v7i1.19860

Abstract

The gourami (Osphronemus goramy) fish is a freshwater fish commonly found in Asia and widely cultivated by fish farmers or local inhabitants. The survival rate of gourami fish from egg to larva and juvenile stages is very low, at approximately 50%. Several factors, such as unstable environmental conditions, poor water quality, and fungal growth on the eggs, cause this. Typically, synthetic medications or natural materials such as betel leaves and others are used to improve gourami fry's survival rate. In this study, the researchers attempted to apply ozone plasma technology dissolved in water to observe the egg hatchability of gourami fish. This study aims to apply technology in fisheries and aquatic sciences. The results of the study show that ozone technology can be applied to observe larval survival, with the highest survival rates found in the 10-minute and 15-minute ozone treatments, both achieving 100% hatchability, with larval survival rates of 86.67% and 96.66%, respectively.
IDENTIFIKASI REACTIVE OXYGEN SPECIES PADA PLASMA DIELECTRIC BARRIER DISCHARGE KONFIGURASI MESH-COPPER YANG DIRANGKAI SINGLE DAN DOUBLE MENGGUNAKAN OPTICAL EMISSION SPECTROSCOPY: Kata Kunci: Plasma DBD, spesies oksigen reaktif, spektroskopi optik emisi, rangkaian tunggal dan ganda Abdurrahman, Ahmad Faruq; Aprilia, Ayu; Zahar, Intan; Kusumandari, Kusumandari; Saraswati, Teguh Endah
Inovasi Fisika Indonesia Vol. 14 No. 1 (2025): Vol 14 No 1
Publisher : Prodi Fisika FMIPA Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/ifi.v14n1.p13-20

Abstract

Penelitian ini bertujuan untuk mengidentifikasi reactive oxygen species (ROS) yang dihasilkan oleh plasma dielectric barrier discharge (DBD) pada konfigurasi rangkaian single dan double menggunakan Optical Emission Spectroscopy (OES). Variasi reaktor DBD digunakan untuk mengevaluasi spektrum emisi plasma. Hasil menunjukkan bahwa intensitas spektrum emisi pada rangkaian double secara umum lebih tinggi dibandingkan dengan Single. Produksi radikal OH dan O pada konfigurasi double lebih stabil, sementara emisi spektrum N₂ menunjukkan intensitas yang lebih besar dibandingkan dengan single. Stabilitas ini diuji lebih lanjut pada sampel dengan pH basa, yang menunjukkan penurunan pH menuju netral. Pengukuran suhu menunjukkan kestabilan selama proses berlangsung, menjadikan konfigurasi double DBD efektif untuk penelitian yang membutuhkan kestabilan suhu larutan. Hasil ini mengindikasikan bahwa rangkaian double dapat meningkatkan efisiensi produksi ROS dalam aplikasi plasma. Kata Kunci: Plasma DBD, spesies oksigen reaktif, spektroskopi optik emisi, rangkaian tunggal dan ganda Abstract This study aims to identify reactive oxygen species (ROS) generated by dielectric barrier discharge (DBD) plasma in single and double configurations using Optical Emission Spectroscopy (OES). Variations in DBD reactors were employed to evaluate the plasma emission spectra. The results showed that the emission intensity in the double configuration was generally higher than in the single configuration. The production of OH and O radicals in the double configuration was more stable, while the N₂ emission spectrum exhibited higher intensity compared to the single configuration. This stability was further tested on a sample with alkaline pH, which showed a decrease in pH toward neutrality. Temperature measurements demonstrated stability throughout the process, making the double DBD configuration effective for studies requiring solution temperature stability. These findings indicate that the double configuration can enhance ROS production efficiency in plasma applications. Keywords: DBD plasma, reactive oxygen species, optical emission spectroscopy, single and double configurations
SOSIALISASI PENGGUNAAN AIR LIMBAH PEMELIHARAAN IKAN UNTUK TANAMAN PADA PEMBUDIDAYA IKAN MEKAR JAYA Puspitasari, Dian; Purba, Deddy Wahyudin; Zahar, Intan; Hariyani, Riska; Rumiati, Rumiati; Batubara, Lokot Ridwan
Jurnal Pemberdayaan Sosial dan Teknologi Masyarakat Vol 5, No 1 (2025): April 2025
Publisher : Smart Education

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54314/jpstm.v5i1.3908

Abstract

Abstract: Wastewater from fish farming is useless to fish breeders and the community in general. The contents of wastewater include specific compounds such as ammonia, which has benefits as a nutrient source for plants. However, this information is restricted between fish breeders, including the Mekar Jaya fish breeders. The goal of this activity is to provide additional knowledge and broaden understanding of the benefits of wastewater from fish farming activities in supporting plant growth. The stages of this activity are the preparation stage, the implementation stage, and the evaluation. The results of this community service activity have a positive impact, namely that partners are using wastewater from fish farming to irrigate plants. The plants irrigated with wastewater from fish farming become more fertile. The community service activity concludes that the socialization related to the utilization of wastewater from fish farming provides positive benefits for partners, as evidenced by the increased productivity of plants and the reduced dependence on chemical fertilizers. Keyword: fish; plant; pond; wastewater. Abstrak: Air limbah yang berasal dari pemeliharaan ikan kurang dimanfaatkan oleh pembudidaya ikan maupun masyarakat pada umumnya. Kandungan dari air limbah adalah senyawa-senyawa tertentu seperti amonia yang memiliki manfaat sebagai sumber nutrisi bagi tanaman. Akan tetapi, informasi ini masih minim di kalangan pembudidaya ikan, salah satunya pembudidaya ikan Mekar Jaya. Tujuan dari kegiatan ini adalah untuk  memberikan pengetahuan tambahan dan memperluas wawasan tentang manfaat air limbah dari kegiatan budidaya ikan dalam mendukung pertumbuhan tanaman. Tahapan dari kegiatan ini yaitu tahapan persiapan, tahapan pelaksanaan dan evaluasi. Hasil kegiatan pengabdian kepada masyarakat ini memberikan dampak positif yaitu mitra menggunakan air limbah dari pemeliharaan ikan untuk menyirami tanaman. Dan tanaman yang disiram menggunakan air limbah pemeliharaan ikan menjadi lebih subur. Simpulan dari kegiatan pengabdian kepada masyarakat yaitu kegiatan sosialisasi terkait pemanfaatan air limbah dari pemeliharaan ikan memberikan manfaat positif bagi mitra, ditandai dengan meningkatnya produktivitas tanaman serta berkurangnya ketergantungan terhadap pupuk kimia. Kata kunci: ikan; tanaman; kolam; air limbah.
Penjernihan Air Sungai Silau Skala Rumah Tangga Kabupaten Asahan Dengan Metode Elektrokoagulasi Hasanah, Moraida; Z, Fynnisa; Zahar, Intan; Rahmadsyah, Rahmadsyah; Harmayani, Harmayani; Saktisahdan, T Jukdin
Jurdimas (Jurnal Pengabdian Kepada Masyarakat) Royal Vol. 6 No. 3 (2023): Juli 2023
Publisher : STMIK Royal

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33330/jurdimas.v6i3.2417

Abstract

challenge that frequently affects daily life. Generally, the community faces water sources that are discolored, oily, and emit unpleasant odors due to their origins as former rice fields or peat soil. Clean water is one of the main needs for humans for survival and is a determining factor in public health and welfare. Making clean water sources in Sidomulyo Village using the electrocoagulation method is one solution that can be offered. The electrocoagulation method involves utilizing electrical energy to coagulate and remove fine particles from water. By conducting simulations or raising awareness among the public about this method, it aims to provide assistance to the community while promoting understanding of how the electrocoagulation process can be used to purify contaminated water sources, addressing issues such as water discoloration, oiliness, and unpleasant odor. Keywords: clean water; polluted water; electrocoagulation method  Abstrak : Masalah air bersih di Desa Sidomulyo terus menjadi isu yang sering muncul dalam kehidupan sehari-hari. Secara umum, air yang digunakan oleh masyarakat di desa tersebut memiliki warna coklat kekuningan, terkontaminasi oleh minyak, dan memiliki aroma yang tidak sedap. Hal ini terjadi karena sumber air yang digunakan berasal dari bekas lahan pertanian sawah atau tanah gambut. Keberadaan air bersih sangat penting bagi kehidupan manusia dan berperan krusial dalam menjaga kesehatan dan kesejahteraan masyarakat. Salah satu solusi yang dapat diterapkan untuk menciptakan sumber air bersih di Desa Sidomulyo adalah dengan menggunakan metode elektrokoagulasi. Metode elektrokoagulasi adalah proses penggumpalan dan pengendapan partikel-partikel halus dalam air dengan menggunakan energi listrik. Diharapkan dengan melakukan simulasi atau penyuluhan kepada masyarakat tentang metode elektrokoagulasi, maka masyarakat dapat terbantu sekaligus memahami tentang aplikasi metode elektrokoagulasi untuk penjernihan sumber air yang tercemar seperti warna air yang kuning kecoklatan, berminyak, dan berbau. Kata kunci : air bersih; air tercemar; metode elektrokoagulasi
Implementasi Teknologi Ozon Untuk Meningkatkan Lama Waktu Simpan Ikan Kembung Di Desa Air Genting Puspitasari, Dian; Zahar, Intan; Zai, Endriyaman; Hura, Riusman; Hariyani, Riska
Jurdimas (Jurnal Pengabdian Kepada Masyarakat) Royal Vol. 7 No. 2 (2024): April 2024
Publisher : STMIK Royal

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33330/jurdimas.v7i2.2955

Abstract

Mackerel (Rastrelliger sp.) is a type of marine fish widely consumed. Several factors influencing it include affordable prices, delicious taste, and the ability to be processed into various dishes. However, mackerel fish has a weakness: it quickly declines in quality if not managed properly. In the face of increasing demand, it is crucial to meet the need for fish with an optimal level of freshness. Methods have been used to maintain the freshness of fish, such as salting, freezing, and using plant ingredients. However, the use of natural ingredients from plants often has a low shelf life and can cause a decrease in fish quality. The method used in community service activities in Air Genting village is counselling. Counselling is carried out through the delivery of material, discussions (in the form of questions and answers), and explanations about tools capable of producing ozone. This activity aims to inform the public about technology with the ozone system. This technology can increase the shelf life of mackerel and keep the quality of the fish good and still suitable for consumption.            Keywords: fish; curing; ozone
Physical and mechanical properties of fiberboard made from corn cob and coconut fiber with natural adhesives Hasanah, Moraida; Marlina, Hilda Ayu; Zahar, Intan; Kadir, Abdul Azis
Jurnal Polimesin Vol 22, No 2 (2024): April
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v22i2.4915

Abstract

Developing fiberboard from agro-industrial and natural waste has a significant impact on environmental practices. Fiberboards made from corncobs and coconut fiber have become a desirable by-product that can serve as a wood substitute. This research aims to analyze the physical and mechanical properties of fiberboard composites created from coconut husks and corn cobs, using natural adhesives like tapioca glue and citric acid. Corn cob particles and coconut fruit fibers were weighed in a 1:1 ratio. Tapioca glue or citric acid was then added in varying percentages: 10%, 14%, 18%, 22%, and 26% of the total mixture. This blend was poured into molds, spread evenly with a spatula, and pressed under 30 kg/cm² (426.7 psi). Subsequently, the samples were carefully removed for physical and mechanical testing. The findings of the study indicated that the different mass variations of corncobs and coconut fibers mixed with natural adhesives successfully produced fiber composites that met the Japanese Industrial Standards (JIS) A 5095:2003 for the "hardboard" classification. The most effective composition was found in sample A5, which contained 26% tapioca glue. Tapioca glue proved to be the superior natural adhesive, surpassing citric acid. Tests conducted on fiberboard A5 revealed the highest density at 0.90 gr/cm³, the lowest porosity at 7.35%, optimal impact strength at 119.99 J/m², tensile strength of 730.50 MPa, and flexural strength of 109.34 MPa. Therefore, this fiberboard demonstrated favorable physical and mechanical properties.
Pengaruh infusa daun pepaya terhadap ikan nila yang terinfeksi Aeromonas hydrophila Puspitasari, Dian; Jeki; Zahar, Intan
Jurnal Penelitian Pendidikan IPA Vol 10 No 5 (2024): May
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v10i5.6852

Abstract

This study aimed to determine the effectiveness of papaya leaf infusion against the weight gain of Nile tilapia infected with Aeromonas hydrophila and identify the active compounds contained therein.This study used a complete randomized design. The treatment consists of 5 treatments: treatment K (control), treatment A (25 ppt), treatment B (50 ppt), treatment C (75 ppt), and treatment D (100 ppt). This research includes several stages, the first being to infect tilapia with A. hydophila. The second stage is to mix papaya leaf infusion into the feed and observe behaviour, clinical symptoms, weight gain, water quality parameters, and phytochemical analysis. Results showed that treatment A showed the highest value for weight gain. Active compounds in papaya leaf infusion are alkaloids, flavonoids, terpenoids/steroids, glycosides, saponins, and tannins. Papaya leaf infusion increased the weight gain of Nile tilapia infected with A. hydrophila.
ANALISIS PENGGUNAAN ABU SEKAM PADI SEBAGAI BAHAN TAMBAH DALAM CAMPURAN PAVING BLOCK TERHADAP KUAT TEKAN DAN POROSITAS Ananda Sitorus, Eka Rizky; Irwansyah, Muhammad; Zahar, Intan
Jurnal Bidang Aplikasi Teknik Sipil dan Sains (BATAS) Vol. 5 No. 1 (2025): NOVEMBER 2025
Publisher : Universitas Asahan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36294/1s15n471

Abstract

Paving blocks are one of the construction materials used as surface coverings, particularly in pedestrian areas, yards, and local roads. In this study, paving blocks were produced by utilizing rice husk ash (RHA) as an additive in the mixture. The use of rice husk ash was chosen due to its high silica content and its potential as an environmentally friendly pozzolanic material. The objective of this research is to determine the compressive strength of paving blocks with variations in rice husk ash content. The mixture variations used were 0%, 6%, and 12% of the total cement weight, with thicknesses of 6 cm and 8 cm, respectively. The compressive strength and porosity tests were conducted at 28 days in accordance with SNI 03-0691-1996. The results showed that the best compressive strength and porosity were obtained in the 0% RHA mixture, reaching 10.99 MPa, compared to the 6% and 12% RHA mixtures. The addition of rice husk ash tended to decrease the compressive strength of the paving blocks due to the increase in porosity, although at certain variations it still met the quality category D according to the SNI standard.
Co-Authors Abdurrahman, Ahmad Faruq Alfaresa, Aisyah Ananda Sitorus, Eka Rizky ANDRIANI, TRI Aprilia, Ayu Batubara, Lokot Ridwan Deddy Wahyudin Purba Dian Puspita Sari Dian Puspitasari Hariyani, Riska Hasanah, Moraida Hilda Ayu Marlina Hura, Riusman jeki Kadir, Abdul Azis Kusumandari, Kusumandari Moraida Hasanah Muhammad Irwansyah, Muhammad Rahmadsyah, Rahmadsyah Rumiati Rumiati, Rumiati Saktisahdan, T Jukdin Susilawati, Susilawati SUTRIONO SUTRIONO Teguh Endah Saraswati Yadi Mulyadi Z, Fynnisa Zai, Endriyaman