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All Journal PROSIDING SEMINAR KIMIA Jurnal Sains dan Kesehatan
Kasik, Olivia Clara
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemistry Immunology & microbiology Medicine & Pharmacology

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PENGARUH MODEL PEMBELAJARAN FLIPPED BERBANTUAN GOOGLE CLASSROOM TERHADAP HASIL BELAJAR SISWA PADA MATERI HUKUM DASAR KIMIA Kasik, Olivia Clara; Masruhim, Muh. Amir; Erika, Farah
PROSIDING SEMINAR KIMIA Vol 3 No 2 (2025): Prosiding SNKT 2024
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

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Abstract

Students' lack of activity in participating in chemistry learning due to learning models that are used too often and lack of variety by teachers causes students to feel bored during learning, resulting in low student learning outcomes. The type of research used was quantitative experimental research, namely quasi-experimental design. Samples were taken by purposive sampling consisting of class X-4 (experimental class) and class X-2 (control class), with a total of 72 students. Data collection techniques use observation, documentation and tests. The data was analyzed using a parametric test, namely the independent sample t-test showing a sig value. 0.00 < 0.05, then HO is rejected and Ha is accepted. This means that there is an influence of the flipped learning model assisted by Google Classroom on student learning outcomes in basic chemical law material. Keywords : Flipped Classroom, Google Classroom, student learning outcomes
Uji Kadar Flavonoid pada Daun Ketapang dan Aktivitasnya sebagai Antioksidan: Determination of Flavonoid Ketapang Leaves and Their Activity as Antioxidants Sari, Laras; Siburian, Putri Dela; Kasik, Olivia Clara; Lestari, Dewi; Erika, Farah
Jurnal Sains dan Kesehatan Vol. 6 No. 5 (2024): J. Sains Kes.
Publisher : Fakultas Farmasi, Universitas Mulawarman, Samarinda, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25026/jsk.v6i5.2413

Abstract

This study aims to determine the total flavonoid content and antioxidant activity of the ethanol extract of ketapang leaves (Terminalia catappa L.) located in the Mulawarman University area. The extract was made using maceration using ethanol solvent. The total flavonoid content test was carried out using the UV-Vis spectrophotometric method. Antioxidant activity testing uses the method of measuring free radical capture by 1,1-diphenyl-2-picrylhydrazyl (DPPH). Testing of total flavonoid levels in the ethanol extract of Ketapang leaves showed the presence of flavonoids of 4.875 mg/L. Meanwhile, testing antioxidant activity using the DPPH method shows the presence of very strong antioxidants. Keywords:          ketapang leaves; flavonoid; antioxidant   Abstrak Penelitian ini bertujuan untuk mengetahui kadar flavonoid total dan aktivitas antioksidan dari ekstrak etanol daun ketapang (Terminalia catappa L.) yang berada di kawasan Universitas Mulawarman. Ekstrak dibuat menggunakan cara maserasi menggunakan pelarut etanol. Uji kadar flavonoid total dilakukan dengan metode spektrofotometri UV-Vis. Pengujian aktivitas antioksidan menggunakan metode pengukuran penangkapan radikal bebas oleh 1,1-difenil-2-pikrilhidrazil (DPPH). Uji kadar flavonoid total pada ekstrak etanol daun ketapang menunjukkan adanya flavonoid sebesar 4,875 mg/L. Sedangkan pengujian aktivitas antioksidan dengan metode DPPH menunjukkan keberadaan antioksidan yang sangat kuat. Kata Kunci:         daun ketapang; flavonoid; antioksidan
Co-Authors Dewi Lestari Farah Erika Masruhim, Muh. Amir Sari, Laras Siburian, Putri Dela