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All Journal Jurnal Kompetensi Teknik Jurnal Bahan Alam Terbarukan Jurnal Pendidikan Teknik Mesin Rekayasa: Jurnal Penerapan Teknologi dan Pembelajaran Sainteknol : Jurnal Sains dan Teknologi Rekayasa Mesin Jurnal Rekayasa Mesin Journal of Mechanical Engineering Science and Technology Journal of Mechanical Engineering Learning Jurnal Teknik Mesin Indonesia Jurnal Penelitian Pendidikan Indonesia Journal of Vocational and Career Education Jurnal Pendidikan dan Teknologi Indonesia Abdi Teknoyasa Jurnal Inovasi Pengabdian dan Pemberdayaan Masyarakat Advance Sustainable Science, Engineering and Technology (ASSET) Jurnal Penelitian Pendidikan Journal of Vocational and Career Education Jurnal Bahan Alam Terbarukan J-Proteksion : Jurnal Kajian Ilmiah dan Teknologi Teknik Mesin
Samsudin Anis
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Aerospace Engineering Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Control & Systems Engineering Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Public Health Social Sciences Other

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Journal : Jurnal Bahan Alam Terbarukan

 1 
Synthesis of Hydroxyapatite from Green Mussel Shells Using Micro-wave Method Through Ultrasonic Mixing Process and Magnetic Stirrer Stirring Agus Prasetyo; Risky Ismail; A. P. Bayuseno; Samsudin Anis; Deni Fajar Fitriyana; Muhammad Afrizal; Januar Parlaungan Siregar
Jurnal Bahan Alam Terbarukan Vol. 14 No. 1 (2025): June 2025 [Nationally Accredited Sinta 3]
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jbat.v14i1.25497

Abstract

Hydroxyapatite (HAp) is a biomaterial containing calcium phosphate with the chemical formula which is similar to the structure of human bone, so it is good for the purpose of healing human bones and teeth. HAp synthesis has several methods that can affect the results of HAp synthesis, such as the method of mixing CaO with phosphate, namely mixing with ultrasonic machines and magnetic stirrers. However, the discussion about the difference of HAp results with the mixing method of ultrasonic machine and magnetic stirrer is still rarely done. Therefore, it is important to examine and compare the characteristics of HAp synthesized by ultrasonic and magnetic stirrer mixing. The result of XRD test shows that HA1 has a purity of weight percentage (wt.%) of HAp crystal of 99.8%, while HA2 has a weight percentage (wt.%) of HAp crystal of 97.7%. For the FTIR test results of both specimens detected the presence of phosphate groups, and hydoxide, where both are the basic form of hydroxyapatite. Carbonate groups were also detected in the test, but it cannot be said to be bad because carbonate is a natural substitute for phosphate. 
The Effect of KNO3 Addition on the Properties of Coconut Shell Charcoal Briquettes Achmad Erlangga Bintang Samodra; Fitriyana, Deni Fajar; samsudin anis; janviter manalu; Al Ichlas Imran; Januar Parlaungan Siregar; Tezara Cionita
Jurnal Bahan Alam Terbarukan Vol. 14 No. 1 (2025): June 2025 [Nationally Accredited Sinta 3]
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jbat.v14i1.26289

Abstract

This research investigates the effects of incorporating potassium nitrate (KNO₃) into coconut shell charcoal briquettes, emphasizing their physical and chemical characteristics. Briquettes were manufactured utilizing coconut shell charcoal powder, tapioca flour as a binder, and different concentrations of KNO₃ (0% and 10%) as an additive. The aim was to assess the impact of KNO₃ incorporation on the water content, ash content, volatile matter, fixed carbon, calorific value, and density of the briquettes. The findings indicated that incorporating KNO₃ resulted in elevated water and ash content, adversely affecting combustion efficiency. Briquettes with increased water content demonstrated reduced mechanical strength and inferior combustion performance. The addition of KNO₃ led to an increased volatile matter content, facilitating ignition of the briquettes while simultaneously resulting in higher smoke emissions. The addition of KNO₃ resulted in a decrease in fixed carbon content, which subsequently lowered the calorific value of the briquettes. The formulation without KNO₃ produced the densest briquette, suggesting that including KNO₃ reduced the briquette density. The inclusion of KNO₃ enhances ignition characteristics; however, it concurrently diminishes the briquettes' overall quality regarding combustion efficiency and calorific value. The Briquette B_1 exhibited the highest results in this investigation, with water content, ash content, volatile matter, fixed carbon content, calorific value, and density values of 4.97%, 1.87%, 17.25%, 80.88%, 7014 Cal/g, and 0.90 g/cm³, respectively.
Co-Authors - Basyirun - Soedartono A. P. Bayuseno Abdul Aziz Achmad Erlangga Bintang Samodra Adhi Kusumastuti Afindala, Ajib Agus Prasetyo Agustinus Purna Irawan Ahmad, Aminullah Ahmad, Aminullah Al Ichlas Imran Aldias Bahatmaka Anas, Fahrudin Anwar Johari Ar Rasyid, Moh. Rizal Ardhianto, Mochamad Marte Atika Atika Azhari, Wildan  Budiandono, Galuh Nur Cholifah, Ayu Cionita, Tezara Danang, Setio Wardana Desyandri Desyandri Djuniadi Djuniadi Dwi Widjanarko Dwi Wijanarko Eko Supraptono Faadhil, Muhammad Faadhil, Muhammad Fahira, Jian Faridah Nur Amalina Feddy Setio Pribadi Fitriyana, Deni Fajar Gustomo, Gigih Heri Yudiono Hidayatulloh, Choirul Fatah Hilal Rozaq Akbar I Made Sudana Iman Taka, Buyung Imran, Al Ichlas Indarsih, Fitria Retno Januar Parlaungan Siregar Jefri Bale Junaedi, Thomas Kalatharan, Sujentheran Nair Kamis, Arasinah Karnowo - Khoiron, Ahmad Mustamil Kuntoro, Tri Latifah, Ana Latifah, Luluk M Burhan R M. Thooriq Anwar Maftukin, M Maftukin, M. Manalu, Janviter Marlangen, Retno Maryanto, Luthfi Eka Maryanto, Luthfi Eka Masugino Moch. Taufiq Ichsan Mochamad Marte Ardhianto Mochammad Marte Ardianto Mufid, Faishal Muhammad Afrizal Muhammad Khumaedi Mustikawati, Diana Langgeng Najibulloh, Gunawan Muhammad Najibulloh, Gunawan Muhammad Nandang Mufti Natalino Fonseca Da Silva Guterres Na’am, Fakhrihun Ninda Kurniadi Nisriinaa, Choirun Noor Hudallah Novitasari, Neny Nugroho, Rizky Fajar Nur Aini, Intan Nur Qudus P Pramono Pangestu, Pulih Phusavat, Kongkiti Pratiwi, Wikanti Prayogo, Wisnu Priyantama, Rifqi Dwi Priyatna, Bambang Sugeng Puspitasari, Windy Desti Putra, Naufal Bahy Rahmagandi, Irma Oktariamlati Rahmat Doni Widodo Rini Kusumawardani, Rini Risky Ismail Rizqi Fitri Naryanto Rosidah Rosidah Rozanna Dewi Rr. Poppy Puspitasari Rubai Wijaya, Burhan Rusdarti - Rusiyanto Rusiyanto, Rusiyanto Sardi Sardi SATRIA, ANAS Septian Eko Cahyanto Shofi, Amalia Siregar, Januar Parlaungan Sonika Maulana Sri Endah Wahyuningsih Sugiarto, Dedi Suharno, Muhamad Sukarni Sukarni Sunarto Sunarto Suprayogi, Sidiq Suryani, Titin Sus Widayani, Sus Susanto Susanto Suwandi, Fakhri Fauzi Tamamudin, Mukhammad Taqy, Ibadurrohman Muhammad Tezara Cionita Titin Agustina Triyanto, Sandy Ulfah Mediaty Arief Utomo, Okky Husnan Arya Vidiyanto, Bagus Prabowo Wibowo, Salvo Eka Wicaksana, Yazid Surya Widya Aryadi Wijayanto, Etanto Heiliano Wildan  Azhari Wisnu Prayogo Yahya Zakaria Yeri Sutopo Yuris Setyoadi Zaenal Abidin Zainal, Z. A.