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All Journal Jurnal Penelitian Pendidikan IPA (JPPIPA) Indonesian Review of Physics (IRiP) JPIn : Jurnal Pendidik Indonesia Hydrogen: Jurnal Kependidikan Kimia Lumbung Inovasi: Jurnal Pengabdian Kepada Masyarakat Nuras : Jurnal Pengabdian Kepada Masyarakat Panthera : Jurnal Ilmiah Pendidikan Sains dan Terapan Indonesian Journal of STEM Education Indonesian Journal of Education and Community Services Indonesian Journal of Applied Science and Technology Indonesian Journal of Teacher Education
Ahmadi Ahmadi
Chemistry Education Study Program, Faculty Of Science, Engineering, And Applied Sciences, Universitas Pendidikan Mandalika, Jl. Pemuda No. 59A, Mataram, Indonesia
Agriculture, Biological Sciences & Forestry Humanities Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Earth & Planetary Sciences Education Engineering Environmental Science Immunology & microbiology Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mathematics Physics Public Health Social Sciences Other

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Pengaruh Volume Minyak Sumbawa Sebagai Antibakteri dalam Pembuatan Sabun Mandi Cair Muhamad Zaenudin; Ahmadi Ahmadi; Hulyadi Hulyadi
Hydrogen: Jurnal Kependidikan Kimia Vol 8, No 2 (2020): Hydrogen: Jurnal Kependidikan Kimia
Publisher : Universitas Pendidikan Mandalika Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (911.789 KB) | DOI: 10.33394/hjkk.v8i2.2983

Abstract

Soap is a necessity for daily life, such as for bathing, washing, and cleaning other necessities. Normally various kinds of bacteria and fungi can live permanently on the skin, for example, such as thebacteria Staphyloccocus aureus. Antibacterial soap is used as a solution to this bacterial problem. Sumbawa oil is a natural ingredient that has the potential to be antibacterial in body wash. Sumbawa oil contains geraniol and citronellal, flavonoids, polyphenols and also contains saponins and tannins. The research objective was to find out what volume of Sumbawa oil is used to obtain the quality of liquid bath soap which has antibacterial content and meets SNI standards. This research is an experimental research in a laboratory by varying the volume of Sumbawa oil. The parameters measured in this study were the effect of variations in the volume of Sumbawa oil on antibacterial properties and pH of liquid bath soap. The findings in this study that the best antibacterial properties were found in the addition of 15 ml volume of Sumbawa oil with an average inhibition zone of 19.5-22.3 mm and a pH of 5 ml of Sumbawa oil volume with an average pH of 6.1. Based on the above findings, it can be concluded that the addition of Sumbawa oil has an effect on the antibacterial properties and pH of liquid bath soap. 
Synthesis Nanofiber PVA/Chitosan Using Electrospinning Method and Application for Gold Recovery Dwi Sabda Budi Prasetya; Ahmadi Ahmadi; Dwi Pangga; Ari Dwi Nugraheni; Harsojo Harsojo; Edy Supriyanto; Habibi Habibi
Indonesian Review of Physics (IRiP) Vol. 4 No. 1 (2021)
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12928/irip.v4i1.3601

Abstract

This paper introduces a new process of gold recovery using nanofiber PVA/Chitosan from a gold-cyanide solution. Gold recovery in cyanide solution is made using nanofiber PVA/Chitosan produced with electrospinning technique. This research was conducted through several stages, 1) The designing of electrospinning tool, 2) Synthesis of nanofiber PVA/Chitosan with electrospinning technique, and 3) Gold recovery experiment using nanofiber PVA/Chitosan biosorption with the variations of initial concentration and time. The results showed that nanofiber PVA/Chitosan could be used as a gold ion absorber. The occuration of the isotherm process follows the Freundlich isotherm model, which is advantageous and occurs on a heterogeneous surface. From the results, it was agreed that nanofiber PVA/Chitosan is potential for gold recovery.
Pengaruh Variasi Jumlah Elektroda Dan Jenis Katalis Terhadap Produksi Gas Hidrogen Pada Elektrolisis Air Laut Ayu Lestari; Yeti Kurniasih; Dahlia Rosma Indah; Ahmadi Ahmadi
Jurnal Pendidik Indonesia (JPIn) Vol 5, No 2: Oktober 2022
Publisher : Yayasan Pendidikan Intan Cendekia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47165/jpin.v5i2.384

Abstract

Potensi energi terbarukan adalah mengubah air laut menjadi gas hidrogen yang diproduksi melalui proses elektrolisis. Elektrolisis adalah proses pemisahan molekul air (H2O) menjadi gas hidrogen (H2) dan oksigen (O2) dengan mengalirkan arus listrik. Energi gas hidrogen dari air laut tidak menyebabkan polusi, ringan dan sustainable sehingga dapat menjadi salah satu solusi terhadap pengurangan pemanasan global. Ada beberapa faktor yang mempengaruhi proses elektrolisis yaitu penggunaan katalisator dan luas permukaan elektroda. Penelitian ini bertujuan untuk mengetahui adanya pengaruh jumlah elektroda dan jenis katalis terhadap jumlah gas hidrogen yang diperoleh melaui proses elektrolisis air laut. Proses elektrolisis dilakukan dengan memvariasikan jumlah elektroda mulai dari 2,4,6,8 dan 10, serta memvariasikan jenis katalis yang digunakan yaitu HCl, HNO3, dan H2SO4. Berdasarkan hasil penelitian menunjukkan bahwa jumlah elektroda berbanding lurus dengan produksi gas hidrogen massa tertinggi dihasilkan pada jumlah 10 plat elektoda dengan massa sebesar 6,9966 gr. Penambahan katalis pada elektrolisis, massa gas hidrogen tertinggi yang dihasilkan adalah 6,9966 gr pada konsentrasi 0,1 M untuk H2SO4, katalis HCl massa gas hidrogen yang dihasilkan 6,6633 gr pada konsentrasi 0,1 M, dan katalis HNO3 massa gas hidrogen yang dihasilkan 5,6300 gr. Jenis katalis yang optimal digunakan pada proses elektrolisis air laut yaitu H2SO4.
Pembinaan Penyusunan Karya Ilmiah Sebagai Upaya Meningkatkan Profesionalisme Guru IPA Di MA Nurul Islam Sekarbela Sri Nopita Primawati; Husnul Jannah; Sucika Armiani; Agus Muliadi; Ahmadi Ahmadi
Lumbung Inovasi: Jurnal Pengabdian kepada Masyarakat Vol. 4 No. 2: November 2019
Publisher : Lembaga Penelitian dan Pemberdayaan Masyarakat (LITPAM)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36312/linov.v4i2.1163

Abstract

Tujuan dari kegiatan pengabdian ini adalah untuk membina guru-guru dalam penyusunan karya ilmiah, sebagai upaya meningkatkan profesionalisme guru IPA di MA Nurul Islam Sekarbela. Kegiatan ini melibatkan 15 orang guru IPA di MA Nurul Islam Sekarbela sebagai mitra kegiatan. Metode yang digunakan dalam kegiatan pengabdian adalah workshop, dengan rangkaian kegiatan yang meliputi pemberian materi, pelatihan, pendampingan, dan evaluasi. Hasil dari kegiatan ini menunjukkan peningkatan pengetahuan guru tentang langkah-langkah penulisan karya ilmiah dan artikel ilmiah, serta kemampuan menulis artikel ilmiah di kalangan guru MA Nurul Islam Sekarbela. Hal ini terlihat dari hasil artikel guru yang telah dipaparkan melalui presentasi, yang menunjukkan peningkatan kualitas artikel dan sesuai dengan harapan. Untuk mencapai hasil yang lebih baik, kegiatan pendampingan perlu dilakukan secara kontinu agar guru dapat mandiri dalam membuat karya ilmiah berupa artikel yang dapat dipublikasikan di jurnal-jurnal nasional. Training on Scientific Writing to Improve the Professionalism of Science Teachers at MA Nurul Islam Sekarbela The aim of this community service activity is to provide training to science teachers in scientific writing, as an effort to improve the professionalism of science teachers at MA Nurul Islam Sekarbela. This activity involves 15 science teachers at MA Nurul Islam Sekarbela as partners. The method used in this community service activity is a workshop, with a series of activities including material delivery, training, mentoring, and evaluation. The results of this activity show an improvement in the knowledge of teachers about the steps of scientific writing and scientific articles, as well as the ability to write scientific articles among teachers at MA Nurul Islam Sekarbela. This is evident from the results of the articles presented by teachers through presentations, which show an improvement in the quality of the articles and are in line with expectations. To achieve better results, continuous mentoring activities need to be carried out so that teachers can independently create scientific works in the form of articles that can be published in national journals.
Pembelajaran Eksperimen Kimia Bagi Siswa Pondok Pesantren Nurul Hakim Ratna Azizah Mashami; Ahmadi Ahmadi
Indonesian Journal of Education and Community Services Vol. 4 No. 1 (2024): Edisi Januari-Juni 2024
Publisher : Indonesian Publication Center

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.67434/ijecs.v4i1.1637

Abstract

Chemistry instruction at the Nurul Hakim Islamic Boarding School (Pondok Pesantren) in Kediri, West Lombok Regency, predominantly relies on lecture-based methods. This approach has led to a lack of deep understanding of chemical concepts among students. Additionally, the limited laboratory facilities have hindered the implementation of practical experiments, which are crucial for enhancing students' comprehension of chemical principles. This community service activity aimed to improve students' learning experiences in chemistry and deepen their understanding of chemical reactions through experimental methods. The activity involved 64 male students from the 10th grade of the Special Education Program. The experimental methods employed in the chemistry lessons enabled students to actively observe, analyze, and apply chemical concepts. Student responses to the experimental learning approach were gathered through questionnaires. The implementation of this community service activity consisted of three stages: preparation, implementation, and follow-up. The results indicated a highly positive response from students, with an average score of 84.8%. The indicator of motivation to learn chemistry achieved the highest score of 90%. These findings suggest that experimental methods are effective in facilitating students' understanding of concepts and increasing their enthusiasm and motivation to learn chemistry. Therefore, experimental methods can be widely implemented to enhance the quality of chemistry education at various levels, particularly in Islamic boarding school environments.
Penggunaan PhET Simulations sebagai Laboratorium Virtual untuk Meningkatkan Keterampilan Memecahkan Masalah Mahasiswa Ratna Azizah Mashami; Ahmadi; Yeti Kurniasih; Yusran Khery
Jurnal Penelitian Pendidikan IPA Vol 9 No 12 (2023): December
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v9i12.6549

Abstract

In the Radiochemistry course so far there have been no experimental activities because there are no laboratory facilities.  However, with the use of technology, students can now easily access a wealth of educational resources online. This research aims to determine the effect of using the PhET Simulations as a virtual laboratory on students' problem solving skills. This research used mixed methods that combines quantitative and qualitative research. A quasi-experiment was carried out using a one group pretest-posttest design then continued with in-depth interviews. The instruments used in this research consisted of written tests to collect data on problem solving skills, questionnaires to collect student response, and interview guides to collect data on the problem solving process. Data in the form of problem solving skills were analyzed statistically using the SPSS 22.0 program while data obtained through questionnaires and interviews were analyzed descriptively. The results of the hypothesis test using Wilcoxon signed rank test show a significant value of 0.001, which means that PhET simulations as a virtual laboratory improve students’ problem solving skills. Students are divided into high-medium-low groups based on problem solving ability and the majority of students are in the medium-ability group. Students responded positively to PhET Simulations as a virtual laboratory. In addition, interview transcripts provide an overview of how students think when solving chemistry problems.
Evaluation of Vocational High School Students' Soft Skills During Industrial Internship: A Case Study of Grade XII Chemical Engineering Students at SMKN 3 Mataram Ahmadi Ahmadi; Baiq Risni Maripa
Indonesian Journal of Applied Science and Technology Vol. 7 No. 1 (2026): Edisi Januari-Juni 2026
Publisher : Indonesian

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.67434/ijast.v7i1.2001

Abstract

This study evaluates soft skills, punctuality, discipline, and work ethic among Grade XII students of SMKN 3 Mataram, Industrial Chemical Engineering Department, during an industrial internship at CV. Chemika Karya is a household-product manufacturer producing soaps, detergents, floor cleaners, and related cleaning products. The study used a qualitative evaluative case study involving six male students who were assessed directly by an industrial supervisor. Data were collected from structured observation sheets, a simple workplace assessment rubric, and supervisor evaluation notes. The assessed dimensions were creativity, teamwork, communication, problem-solving, punctuality, discipline, and work ethic. Data were analyzed using simple tools: spreadsheet tabulation to summarize assessment categories, color-coded recapitulation to identify recurring patterns, and a manual thematic matrix to interpret supervisor notes. The findings show that creativity, teamwork, communication, problem-solving, and punctuality were still weak. Students tended to wait for instructions, were not yet confident in proposing ideas, needed guidance in coordinating tasks, and often reported problems only after being asked by the supervisor. Punctuality also required improvement, especially in arriving on time and completing assigned tasks according to schedule. However, work ethic was assessed positively because students showed willingness to learn, respect for workplace procedures, and responsibility for assigned work. These findings suggest that vocational schools need to strengthen pre-internship preparation through work communication drills, collaborative assignments, simple problem-based learning, punctuality habituation, and continuous feedback from industrial supervisors.
Vegetable Oils and Hibiscus rosa-sinensis Leaf Extract in Solid Soap Formulation Marliandi Tamo Ama; Ahmadi; Hulyadi; Baiq Risni Maripa; Yusran Khery
Hydrogen: Jurnal Kependidikan Kimia Vol. 14 No. 3 (2026): June 2026
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/hjkk.v14i3.21188

Abstract

This study identified the effects of vegetable oil formulation and Hibiscus rosa-sinensis leaf extract concentration on the physicochemical quality of laboratory-scale solid soap. A 3 x 4 factorial design was used, consisting of three oil bases (A1, A2, and A3) prepared from coconut, olive, and palm oils and four extract concentrations (0, 1, 2, and 3%). The measured parameters were pH, moisture content, foam height, foam stability, organoleptic acceptance, and UV-Vis maximum wavelength of selected extract-containing soaps. The pH of all samples ranged from 9.00 to 9.43, indicating an alkaline soap system consistent with saponification. Moisture content varied from 11.00 to 19.00%; several samples met the 15% moisture criterion, while F1 and F4 exceeded it. Foam stability ranged from 74.96 to 88.89%, and foam height ranged from 0.33 to 1.33 cm. The A3 oil base showed the lowest mean moisture content (12.33%) and the highest mean foam stability (84.77%). Organoleptic evaluation indicated that F5 was the most preferred sample, whereas F11 was selected as the strongest technical candidate because it contained 2% extract, had the lowest moisture content, and showed the highest foam stability. UV-Vis analysis of A3 extract-containing soaps showed lambda max values of 374-377 nm with absorbance values of 0.747-0.751, supporting the persistence of flavonoid-related absorption in the soap matrix. The findings indicate that vegetable oil composition and H. rosa-sinensis leaf extract concentration influence solid soap quality and should be optimized jointly.
Potensi Sistem Integrasi Ternak-Tanaman Pangan dan Hortikultura sebagai Agroeduwisata Berkelanjutan : Kajian Ontologis, Epistemologis, dan Aksiologis di Irigasi Batu Bulan, Sumbawa Amrullah Amrullah; Muhammad Sarjan; Ahmadi Ahmadi; Sudarli Sudarli; Gunawan Gunawan; Asrul Hamdani; Edy Wahyu Satria
Panthera : Jurnal Ilmiah Pendidikan Sains dan Terapan Vol. 6 No. 1 (2026): January
Publisher : Lembaga Pendidikan, Penelitian, dan Pengabdian Kamandanu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36312/panthera.v6i1.825

Abstract

The integration of livestock-food crops and horticulture is a strategic approach in realizing a sustainable agricultural system, especially in irrigated areas such as the Batu Bulan irrigation in Sumbawa Regency. This system not only increases resource efficiency through the utilization of crop waste as animal feed, the use of organic fertilizer from feces, and the planting of legumes to improve soil fertility, but also has the potential to be developed into agro-edutourism that can increase farmers' income. This study aims to analyze the potential of integration from the perspective of ontology, epistemology, and axiology, and assess its relevance as a basis for developing sustainable agro-edutourism. The method used is a systematic narrative review of international literature (2015-2024) covering the themes of agriculture-livestock integration, agro-edutourism, sustainability, and the philosophy of science. The results of the study indicate that livestock-crop integration has an ontological basis as an integrated agroecological system, an epistemological basis through scientific and local knowledge, and an axiological basis as a source of economic, educational, and ecological value. The development of integrated agro-educational tourism in the Batu Bulan irrigation system has the potential to increase farmer incomes, improve soil health, and strengthen local food security. With institutional support, technology, and multi-stakeholder collaboration, this model can become a viable and valuable strategy for sustainable agricultural development.
Sistem Pertanian Terpadu di Lahan Kering : Integrasi Sapi-Jagung-Gamal di Das Batu Lanteh, Sumbawa Sudarli Sudarli; Muhammad Sarjan; Arifuddin Sahidu; Amrullah Amrullah; Ahmadi Ahmadi; Husnul Jannah; Mutia Devi Ariyana; Gunawan Gunawan; Aida Muspiah
Panthera : Jurnal Ilmiah Pendidikan Sains dan Terapan Vol. 6 No. 1 (2026): January
Publisher : Lembaga Pendidikan, Penelitian, dan Pengabdian Kamandanu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36312/panthera.v6i1.826

Abstract

The Integrated Agricultural System (SPT) is a strategic approach in dryland development, as it is able to respond to various biophysical constraints such as water limitations, low soil fertility, and production fluctuations. In the Batu Lanteh watershed, Sumbawa Regency, the integration of cattle-corn-gamal is a synergistic model that combines the production of food crops, the provision of forage feed, and the use of livestock waste as a source of organic fertilizer. Various studies show that plant-livestock-tree integration can increase corn productivity, improve soil quality, increase land use efficiency, and strengthen the economic resilience of farmer households (Irawan et al., 2024; Panjaitan et al., 2019). This study analyzes the integration system from an epistemological perspective, especially in looking at the relationship between farmers' local knowledge and scientific knowledge developed through research and program interventions. The results of the review show that there is an epistemological tension between local knowledge that is empirical-contextual and scientific knowledge that is procedural-generalizing. However, the integration of the two is possible through a hybrid epistemology that emphasizes co-creation of knowledge, dual validation, and farmer participation in the innovation process. The conclusion of the study emphasizes that the success of cattle-corn-gamal integration is largely determined by the harmonization between local and scientific perspectives, so that this epistemological approach becomes the basis for the formulation of a more adaptive, participatory, and sustainable dryland agricultural policy in Sumbawa Regency.
Co-Authors Agus Muliadi Aida Muspiah Amrullah Amrullah Ari Dwi Nugraheni Arifuddin Sahidu Arinda Yusfika Rahma Asrul Hamdani Ayu Lestari Baiq Asma Nufida Baiq Muli Harisanti Baiq Nabila Saufika Zainuri Baiq Risni Maripa Baiq Risni Maripa Dahlia Rosma Indah Dwi Ariani Dwi Pangga Dwi Sabda Budi Prasetya Edy Supriyanto Edy Wahyu Satria Fahmi Yahya Fahmi Yahya G. Gunawan Gunawan Gunawan Habibi Habibi Harsojo Harsojo Hikmawati Hulyadi Hulyadi, Hulyadi Husnul Jannah Husnul Jannah Lovy Herayanti Lovy Herayanti Marliandi Tamo Ama Mei Dwi Astuti Muhamad Zaenudin Muhammad Roil Bilad Muhammad Sarjan Muhammad Taufik Mutia Devi Ariyana Ratna Azizah Mashami Siti Mesarah Sri Nopita Primawati Sriyanti Suhartini SUCIKA ARMIANI, SUCIKA Sudarli Sudarli Yeti Kurniasih Yusran Khery Yusran Khery Yusran Khery Yusran Khery