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All Journal Jurnal Pendidikan : Riset dan Konseptual Biosaintifika: Journal of Biology & Biology Education
Yadi, Yadi
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Agriculture, Biological Sciences & Forestry Education

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PENERAPAN MODEL PROBLEM BASED LEARNING BERBANTUAN MIND MAPPING UNTUK MENINGKATKAN HASIL BELAJAR TERMODINAMIKA Yadi, Yadi
Jurnal Pendidikan : Riset dan Konseptual Vol 1 No 1 (2017): Volume 1, Nomor 1, Oktober 2017
Publisher : Lembaga Penelitian dan Pengabdian Universitas Nahdlatul Ulama Blitar

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (137.286 KB) | DOI: 10.28926/riset_konseptual.v1i1.9

Abstract

Dalam rangka meningkatkan prestasi belajar Fisika yang memuat Termodinamika pada Siswa Kelas XI IPA 2 SMA Negeri 1 Kalidawir Tulungagung, Peneliti melakukan penelitian tindakan kelas dengan menerapkan pendekatan Problems Based Learning berbantuan dengan Metode Mind Mapping pada pembelajaran Fisika. Sasaran penelitian ini adalah siswa Kelas XI IPA 2 SMA Negeri 1 Kalidawir Tulungagung yang berjumlah 35 siswa. Berdasarkan hasil observasi yang dilakukan di Kelas XI IPA 2 pada waktu pembelajaran Fisika diperoleh hasil bahwa prestasi belajar siswa kurang memuaskan, yaitu dari 35 siswa hanya 14 siswa yang nilainya dapat mencapai KKM atau â?¥ 70, sedangkan 21 siswa lainnya masih belum dapat mencapai KKM atau â?¤ 69. Simpulan dari penelitian ini adalah pendekatan Problems Based Learning berbantuan dengan Metode Mind Mapping dapat meningkatkan prestasi belajar siswa pada pembelajaran Fisika yang memuat Termodinamika.
Antioxidant Activity of Endophytic Fungi Isolated from Turmeric Flowers Septiana, Eris; Yadi, Yadi; Simanjuntak, Partomuan
Biosaintifika: Journal of Biology & Biology Education Vol 12, No 2 (2020): August 2020
Publisher : Department of Biology, Faculty of Mathematics and Sciences, Semarang State University . Ro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/biosaintifika.v12i2.24396

Abstract

Antioxidants are compounds needed by the body to fight free radicals that can cause adverse effects on health. All parts of turmeric plant have antioxidant activity, so does the flower. It is thought that the endophytic fungi from turmeric flowers also have antioxidant activity and no studies have reported it yet. The purpose of this study was to study the antioxidant activity of single and mixed cultures of endophytic fungi isolated from turmeric flowers. In vitro antioxidant activity assay was conducted using the DDPH (2,2-diphenyl-1-picrylhydrazyl) free radical scavenging method by measuring its absorption using a UV-Vis spectrophotometer at a wavelength of 517 nm. The extract of single and mixed cultures of endophytic fungi isolated from turmeric flowers showed antioxidant activity. The combination of fungal cultures can increase the antioxidant activity of a single culture. This study is the first to report that the combination of endophytic fungi from turmeric flowers can increase its antioxidant activity. Therefore, the presence of the endophytic fungi in turmeric flowers that have antioxidant activity can provide additional information so that the utilization of turmeric flowers as a source of natural antioxidants will increase.
Co-Authors ERIS SEPTIANA Partomuan Simanjuntak