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All Journal Science Map Journal Physikos: Journal of Physics and Physics Education
Masbait, Kristi Wansia
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Chemistry Education Electrical & Electronics Engineering Energy Materials Science & Nanotechnology Mathematics Physics Social Sciences

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SINTESIS DAN KARAKTERISASI SIFAT OPTIK SABUN CAIR BERBAHAN LIMBAH MINYAK GORENG BEKAS Masbait, Kristi Wansia; Souisa, Cinta Amergebi; Tuhumury, Yunita; Barus, Carolina Sri Athena; Jaya, Gede Wiratma
Science Map Journal Vol 6 No 1 (2024): Science Map Journal
Publisher : Jurusan Pendidikan MIPA FKIP Universitas Pattimura

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Abstract

Limbah minyak goreng bekas dapat digunakan sebagai bahan baku utama pembuatan sabun cair dengan tujuan untuk mengurangi pencemaran lingkungan. Penelitian ini bertujuan untuk mensintesis dan mengkaraterisasi sifat optik sabun cair berbahan limbah minyak goreng bekas. Proses pembuatan menggunakan beberapa bahan, yaitu minyak goreng bekas, buah cengkeh, arang, Kalium Hidroksida (KOH), dan air. Bahan tersebut dilakukan pencampuran dengan berbagai tahap untuk menghasilkan sabun cair. Hasil dari pembuatan sabun cair dari minyak goreng bekas menghasilkan sampel berwarna kecoklatan, tekstur halus dan lembut, dan menghasikan busa yang banyak, tetapi tidak memunculkan aroma cengkeh. Karakterisasi sifat optik sabun cair menunjukkan bahwa sabun yang dihasilkan memiliki nilai absorbansi pada berbagai panjang gelombang yang lebih besar dibandingkan nilai absorbansi sabun cair pasaran. Energi pita celah yang dihasilkan sabun cair minyak goreng bekas lebih kecil dibandingkan sabun cair pasaran, sehingga memberikan potensi aplikasi sebagai material Dye Sensitized Solar Cell (DSSC) dan berpotensi dapat terurai dengan sendirinya menggunakan reaksi fotokatalis
Peningkatan Penguasaan Materi Melalui Model Learning Cycle 5E Berbantuan Video Pembelajaran Masbait, Kristi Wansia; Huliselan, Estevanus Kristian; Tamaela, Elsina Sarah
Physikos: Journal of Physics and Physics Education Vol 4 No 1 (2025): Physikos: Journal of Physics and Physics Education
Publisher : Pattimura University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/physikos.4.1.17645

Abstract

The purpose of this study is to find out how well eighth-grade students at SMP Negeri 39 Central Maluku learn vibration and wave topics when they are taught using the Learning Cycle 5E model and learning videos. The research design used was a one-group pretest-posttest, with 16 students used as research subjects. The instruments used in collecting data for this study consisted of test instruments in the form of test questions and non-tests in the form of Learner Worksheets (LKPD). The study's results indicate that the material mastery ability of all students (100%) falls into the failing qualification category, with an average score of 20.54. The analysis reveals that students achieve an average score of 78,60 during the learning process, indicating a good qualification. The results of the N-Gain Test show that the average score of students is 0.70, which is a high qualification. The results showed that there was an increase in students' mastery of material in each indicator of competency achievement, with an average final score of 75.71. This means that using the Learning Cycle 5E model along with learning videos has been shown to help all of the students at SMP Negeri 39 Central Maluku learn more about vibration and waves.
Co-Authors Barus, Carolina Sri Athena Elsina Sarah Tamaela, Elsina Sarah Estevanus Kristian Huliselan Gede Wiratma Jaya Souisa, Cinta Amergebi Tuhumury, Yunita