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All Journal Indonesian Review of Physics (IRiP) JPIn : Jurnal Pendidik Indonesia Hydrogen: Jurnal Kependidikan Kimia Lumbung Inovasi: Jurnal Pengabdian Kepada Masyarakat
Ahmadi Ahmadi
Universitas Pendidikan Mandalika
Humanities Astronomy Chemistry Earth & Planetary Sciences Education Environmental Science Materials Science & Nanotechnology 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.
Co-Authors Agus Muliadi Ari Dwi Nugraheni Ayu Lestari Dahlia Rosma Indah Dwi Pangga Dwi Sabda Budi Prasetya Edy Supriyanto Habibi Habibi Harsojo Harsojo Hulyadi, Hulyadi Husnul Jannah Muhamad Zaenudin Sri Nopita Primawati SUCIKA ARMIANI, SUCIKA Yeti Kurniasih