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All Journal International Journal of Renewable Energy Development Transmisi: Jurnal Ilmiah Teknik Elektro Jurnal Sains Materi Indonesia Majalah Kulit, Karet, dan Plastik Jurnal Penelitian Karet Indonesian Journal of Chemistry GANDRUNG: Jurnal Pengabdian Kepada Masyarakat Jurnal Abdiraja International Journal of Social Service and Research Makara Journal of Technology Innovative: Journal Of Social Science Research Bulletin of Chemical Reaction Engineering & Catalysis
Rochmadi Rochmadi
Gadjah Mada University
Religion Agriculture, Biological Sciences & Forestry Humanities Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Decision Sciences, Operations Research & Management Dentistry Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mechanical Engineering Nursing Physics Public Health Social Sciences Other

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Microwave-Assisted Extraction of Polysaccharides from Chlorella pyrenoidosa and Its Characterization Aulia, Margaretha Praba; Azis, Muhammad Mufti; Rochmadi, Rochmadi; Budiman, Arief
Indonesian Journal of Chemistry Vol 25, No 3 (2025)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.103337

Abstract

This study explored an efficient method for extracting polysaccharides from Chlorella pyrenoidosa using microwave-assisted extraction (MAE) with water as the solvent, a technique consistent with green chemistry principles. The goal was to enhance the yield and quality of polysaccharides for their potential applications as multifunctional active ingredients in the pharmaceutical and functional food industries. Key extraction parameters, including extraction time (10, 20, and 30 min), temperature (80 °C), and solid-to-liquid ratios (1:20, 1:30, 1:40 m/v), were systematically evaluated. The results indicated that a solid-to-liquid ratio of 1:40 m/v at 80 °C for 10 min yielded the highest polysaccharide content (56.64%). FTIR analysis confirmed the presence of pyranose rings in D-glucose and hydroxyl groups, while HPLC identified D-mannose (58.12%) as the predominant sugar, followed by D-glucose (34.46%), D-galactose (3.61%), and L-rhamnose (3.81%). Purified polysaccharide was composed of major mannose and glucose, a biomolecule very important given that it has wide applications in medical and food industries.
Peningkatan Mutu Sumber Daya Manusia Pendidikan Melalui Motivasi Kerja Bagi Guru dan Guru Pendamping Khusus (GPK) MIM PK Kartasura Berbasis Employee Engagement Training Indri, Indri; Rochmadi, Rochmadi; Rahayu, Yayuk Nur
Jurnal ABDIRAJA Vol 8 No 2 (2025): Jurnal Abdiraja
Publisher : LPPM Universitas Wiraraja Sumenep, Jalan Raya Sumenep Pamekasan KM. 5 Patean Sumenep 69451, Telp. (0328) 673399 Fax. (0328) 673088

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24929/adr.v8i2.4287

Abstract

Madrasah ibtidaiyah memegang peran penting dalam membentuk generasi yang tidak cakap secara intelektual, tetapi juga berakhlak mulia sesuai nilai-nilai keislaman. Sebagai lembaga pendidikan berbasis agama, madrasah ibtidaiyah menghadapi tantangan besar dalam menjaga kualitas dan eksistensinya di tengah persaingan dengan sekolah-sekolah formal lainnya. Kompetisi ini tidak terbatas pada pencapaian akademis semata, melainkan juga menyangkut kemampuan institusi dalam menarik minat dan membangun kepercayaan publik. Tujuan dari pengabdian ini adalah untuk meningkatkan loyalitas dan semangat kinerja para guru dan guru pendamping khusus atau guru program inklusi. Pengabdian dilaksanakan di Madrasah Ibtidaiyah Muhammadiyah (MIM) PK Kartasura. Solusi yang ditawarkan berupa Employee Engagement Training.
Konstruksi Pengetahuan Dalam Filsafat Ilmu Dan Penerapannya Dalam Pembentukan Kriteria Keadilan Dalam Filsafat Hukum Rochmadi, Rochmadi; Israhadi, Evita Isretno
Innovative: Journal Of Social Science Research Vol. 4 No. 2 (2024): Innovative: Journal Of Social Science Research
Publisher : Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/innovative.v4i2.9909

Abstract

Makalah ini membahas konstruksi pengetahuan dalam filsafat ilmu dan penerapannya dalam pembentukan kriteria keadilan dalam filsafat hukum, dengan fokus pada studi kasus kasus Brown v. Board of Education di Amerika Serikat. Filsafat ilmu mengajukan pertanyaan fundamental tentang hakikat pengetahuan, metode perolehannya, dan validitasnya. Filsafat hukum, di sisi lain, menyoroti konsep keadilan dan cara mewujudkannya dalam sistem hukum. Melalui metode deskriptif kualitatif, makalah ini menggabungkan analisis teks filosofis dan studi literatur untuk memahami konstruksi pengetahuan dalam filsafat ilmu dan penerapannya dalam pembentukan kriteria keadilan dalam filsafat hukum. Studi kasus Brown v. Board of Education menunjukkan bagaimana pertimbangan ilmiah dan moral memengaruhi pengambilan keputusan hukum, menegaskan bahwa keadilan dalam hukum tidak dapat terlepas dari pemahaman yang mendalam tentang realitas sosial dan konteksnya. Hasil pembahasan menyoroti pentingnya pengetahuan dalam memahami dan mengatasi ketidakadilan sosial, serta mengembangkan kerangka kerja untuk menerapkan pengetahuan dalam filsafat ilmu dalam pembentukan kriteria keadilan dalam filsafat hukum. Karya-karya filosof ilmu seperti Karl Popper, Thomas Kuhn, dan Paul Feyerabend, serta teori-teori keadilan dari John Rawls, H.L.A. Hart, dan Ronald Dworkin, menjadi landasan utama untuk analisis ini.
Strengthening Inclusive Learning through Adaptive Physical Education for Madrasah Ibtidaiyah Muhammadiyah Special Program Kartasura Students Jariono, Gatot; Nurhidayat, Nurhidayat; Sudarmanto, Eko; Tulloh, Rahma; Anggoro, Santoso Dwi; Rochmadi, Rochmadi; Nursyifa, Kautsar Rizqi; Sudrajat, Adam
GANDRUNG: Jurnal Pengabdian Kepada Masyarakat Vol. 7 No. 1 (2026): GANDRUNG: Jurnal Pengabdian Kepada Masyarakat
Publisher : Fakultas Olahraga dan Kesehatan, Universitas PGRI Banyuwangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36526/gandrung.v7i1.6146

Abstract

This community service activity was carried out at Madrasah Ibtidaiyah Muhammadiyah Special Program (MIM SP) Kartasura, Sukoharjo District, Central Java with a focus on strengthening inclusive learning through the Adaptive Physical Education approach. The main issue faced by schools is the limitation of teachers in designing physical activities that are friendly to students with special needs, so assistance is needed to improve pedagogical competence while creating an equal learning atmosphere. The implementation method includes the stage of identifying needs, teacher training, designing adaptive physical learning models, and implementation and evaluation through direct practice in the classroom. A participatory approach is used so that teachers and students are actively involved in the learning process. The results of the mentoring showed an increase in teachers' understanding of the principles of adaptive physical education, the availability of varied and inclusive physical activity designs, and an increase in the involvement of students with special needs in physical activities. The program also fosters regular students' positive attitudes toward their peers with special needs. Thus, this service has succeeded in making a real contribution to strengthening inclusive learning practices in elementary schools through the optimization of adaptive physical education
Modification of HZSM-5 with Phosphotungstate, Silver, and Cobalt to Enhance Catalytic Reaction of Bioethanol to Bioethylene Risnawati, Dhea Atika; Pradana, Nova Yoga; Rochmadi, Rochmadi; Prasetyo, Imam; Saputra, Daffa Dewa; Pranamuda, Hardaning; Tandio, Sugianto; Ariyanto, Teguh
Bulletin of Chemical Reaction Engineering & Catalysis 2026: BCREC Volume 21 Issue 2 Year 2026 (August 2026)
Publisher : Masyarakat Katalis Indonesia - Indonesian Catalyst Society (MKICS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9767/bcrec.20604

Abstract

Developing an optimal catalyst formulation is a critical challenge in expanding sustainable ethylene production and utilization as a chemical intermediate product. Metal oxide impregnation (silver nitrate (AgNO3), cobalt nitrate (Co(NO3)2), and phosphotungstic acid (H3PW12O40)) was used to enhance the catalytic performance of HZSM-5 by increasing active sites and acidity. The preparation of the catalyst was performed by the impregnation of various metals and amounts of loading particles inside the pores of HZSM-5. The particles were impregnated by incipient wetness impregnation and followed by calcination to obtain Ag/HZSM-5, Co/HZSM-5, and W/HZSM-5 catalysts. Characterization techniques, including N2 adsorption-desorption, SEM, and XRD, were used to analyze the catalyst properties. Catalytic performance was evaluated in a packed-bed reactor under varying reaction conditions at WHSV 1.8 h-1. The aim of this research is to identify optimal catalyst formulations that exhibit superior activity in both conversion and selectivity towards ethylene production. Modified HZSM-5 catalysts incorporating Ag, Co, and W exhibited enhanced catalytic performance for bioethanol dehydration to bioethylene, attributed to optimized acidic sites, pore structure, and metal synergy. The 1%W/HZSM-5 catalyst demonstrated superior ethylene conversion (98.2%) and selectivity (99.88%) at 300 ℃. Increasing tungsten loading up to 2% impacted the conversion of bioethanol. Copyright © 2026 by Authors, Published by BCREC Publishing Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0).
Co-Authors Abdul Syakur Abu Hasan Achmad Noerkhaerin Putra Aminuyati Anggoro, Santoso Dwi Arief Budiman Baehaqi Bambang Sutopo Budhijanto Budhijanto, Budhijanto Cahyono, Rochim Bakti Eli Rohaeti Eni Budiyati Gatot Jariono Hamzah Berahim Hardaning Pranamuda Hary Sulistyo Henry Prastanto, Henry Imam Prasetyo Indri Indri Israhadi, Evita Isretno Kautsar Rizqi Nursyifa, Kautsar Rizqi Margaretha Praba Aulia Muhammad Amiruddin Muhammad Mufti Azis Mujiyono Mujiyono Muslikhin Hidayat Nurhidayat Nurhidayat Pradana, Nova Yoga Prima Astuti Handayani Rahayu, Yayuk Nur Ratna Dewi Kusumaningtyas Risnawati, Dhea Atika Saputra, Daffa Dewa Sarjiya Siti Jamilatun Sudarmanto, Eko Sudrajat, Adam Suharto Honggokusumo Suryo Purwono Tandio, Sugianto Teguh Ariyanto Tulloh, Rahma Winarko AP Wusana Agung Wibowo, Wusana Agung