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All Journal Optika : Jurnal Pendidikan Fisika Journal of Innovative Physics Education Research
Mustaqim, Ilham
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Astronomy Earth & Planetary Sciences Education Physics

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APLIKASI CARBON DOTS MENGGUNAKAN LIMBAH KULIT SALAK DENGAN MENGGUNAKAN METODE MICROWAVE UNTUK PERTUMBUHAN TANAMAN CAISIM Fitri, Amelia Febriana; Septiyanto, Rahmat Firman; Mukhtar, Yus Rama Denny; Affifah, Isriyanti; Mustaqim, Ilham; Ayu, Widya Purbo Kusumaning
OPTIKA: Jurnal Pendidikan Fisika Vol. 9 No. 1 (2025): OPTIKA: Jurnal Pendidikan Fisika
Publisher : Department of Physics Education, Faculty of Teacher Training and Education, Universitas Flores

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37478/optika.v9i1.5614

Abstract

Pengembangan teknologi pertanian ramah lingkungan sangat penting untuk mendukung ketahanan pangan global. Penelitian ini bertujuan untuk mensintesis carbon dots (C-dots) dari limbah kulit salak menggunakan metode iradiasi microwave serta mengkaji pengaruhnya terhadap pertumbuhan tanaman caisim (Brassica juncea L.). Kulit salak dihaluskan, disaring, dan dipanaskan menggunakan microwave untuk menghasilkan C-dots, yang dikonfirmasi melalui uji fluoresensi sinar UV. Tanaman caisim dibagi menjadi dua kelompok: satu disiram dengan aquades dan satu lagi dengan larutan C-dots, masing-masing selama 10 hari. Hasil penelitian menunjukkan bahwa tanaman yang disiram larutan C-dots memiliki rata-rata pertumbuhan 3,5 cm, sedikit lebih rendah dibandingkan dengan 3,9 cm pada kelompok kontrol. Temuan ini menunjukkan bahwa C-dots berpotensi mendukung pertumbuhan tanaman, namun diperlukan optimalisasi konsentrasi dan metode aplikasi untuk meningkatkan efektivitasnya.
Development and Limited Test of Kinematics Conception Diagnostic Instrument: A Rasch Model Analysis Approach Apriliana, Hana; Sasmita, Aden Yusril; Mustaqim, Ilham; Rahmawati, Rika; Suryana, Tresna Galih Sukma
Journal of Innovative Physics Education Research Vol. 1 No. 1 (2025): Journal of Innovative Physics Education Research
Publisher : CV. Dharma Samakta Edukhatulistiwa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61142/jiper.v1i1.194

Abstract

This study aims to identify and analyze misconceptions experienced by students on kinematics material. The approach used is quantitative, with a two-level diagnostic test method consisting of 10 multiple choice questions designed to detect misconceptions, involving 30 students of class XI MIPA at SMAN 4 Serang City. The research process included instrument development, expert validity test, limited trial, and data analysis. The question testing design used the Rasch Model Analysis method. Overall, this diagnostic test instrument showed good validity. The analysis results showed that the item reliability value reached 0.89, which indicated that the quality of the items was good. The findings of the data analysis show that students experience misconceptions caused by misunderstanding the concept of kinematics. Based on the results of this study, it is recommended that more effective learning strategies, such as the use of visual media and hands-on practicum, be applied to improve students' understanding of the concept of kinematics. In addition, training for teachers is also needed to improve their ability to identify and overcome misconceptions experienced by students.
Co-Authors Apriliana, Hana Ayu, Widya Purbo Kusumaning Fitri, Amelia Febriana Isriyanti Affifah, Isriyanti Mukhtar, Yus Rama Denny Rahmat Firman Septiyanto, Rahmat Firman Rika Rahmawati Sasmita, Aden Yusril Suryana, Tresna Galih Sukma