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MODEL OF EDUCATION RECONSTRUCTION TERHADAP MISKONSEPSI PESERTA DIDIK PADA TOPIK RESPIRASI ANAEROB Pasaribu, Mika Yanti Arita; Wainarisi, Esterlin; Hadirama, Khanna; Nursa'adah, Euis
Jurnal Pendidikan Biologi Vol 15, No 1 (2024)
Publisher : Universitas Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17977/um052v15i1p89-94

Abstract

Abstrak. Respirasi Anaerob merupakan salah satu topik pelajaran biologi yang wajib dipelajari oleh peserta didik kelas XII IPA. Pada topik respirasi anaerob mempelajari tentang bioteknologi. Bioteknologi sangat bermanfaat dalam kehidupan sehari-hari karena penerapannya berkaitan dengan respirasi anaerob. Namun pada topik ini memiliki tingkat kesulitan yang cukup tinggi dan seringkali peserta didik mengalami miskonsepsi pada tahapan, pemanfaatan mikrobia dan produk yang dihasilkan dalam respirasi anaerob. Dengan demikian diperlukan Model of Education Reconstruction (MER) untuk memperbaiki konsepsi peserta didik menjadi konsep ilmuan dengan penerapan desain pembelajaran berbasis video dan praktikum. Penggunaan video dalam kegiatan pembelajaran dapat memaparkan tahapan dan pemanfaatan mikrobia dalam penerapan konsep respirasi anaerob. Sedangkan melalui kegiatan praktikum peserta didik dapat melihat secara langsung produk yang dihasilkan dalam respirasi anaerob. Subjek penelitian ini berjumlah 20 orang peserta didik kelas XII IPA SMA Negeri 11 Kota Bengkulu dengan 10 orang laki-laki dan 10 orang perempuan. Instrumen penelitian berupa three-tier test yang diberikan kepada sampel pada kegiatan pre-assesment dan post-assesment. Hasil penelitian pada pre-assesment menunjukkan konsepsi peserta didik pada topik respirasi anaerob tergolong rendah, dengan data 33% miskonsepsi, 42% tidak tahu konsep, dan 25% tahu konsep. Setelah dilaksanakan Model of Education Reconstruction (MER) berbasis video dan praktikum, konsepsi peserta didik mengalami peningkatan. Hal ini dibuktikan dengan hasil post-assesment, yaitu 16% miskonsepsi, 2 % tidak tahu konsep, dan 82% tahu konsep. Dari persentase tersebut menunjukkan bahwa Model of Education Reconstruction (MER) berbasis video dan praktikum mampu meningkatkan pemahaman konseptual peserta didik pada topik respirasi anaerob. Abstract. Anaerobic Respiration is one of biology topics that must be studied by XII IPA high school Students. The topic is Biotechnology which useful in everyday life due to its application related to anaerobic respiration. However, this topic has a fairly high level of difficulty and sometimes make students get misconceptions about the stages between microbes and the products produced in anaerobic respiration. Thus a Model of Education Reconstruction (MER) is needed to improve students' conceptions into scientific concepts by applying video-based learning designs and practicums. It can be used to explain the stages and utilization of microbes in applying the concept of anaerobic respiration. Meanwhile, through practicum, the students can see directly the products produced in anaerobic respiration. The subjects of this study were 20 students of XII IPA high School in Bengkulu City which consist of 10 boys and 10 girls. The research instrument was a three-tier test which was given to the sample in the pre-assessment and post-assessment activities. The results of the pre-assessment showed that students' conceptions on the topic of anaerobic respiration were low, with the data of 33% misconceptions, 42% did not know the concept, and 25% knew the concept. After implementing the video and practicum-based Model of Education Reconstruction (MER), students' conceptions have increased. This is evidenced by the post-assessment results, namely 16% had misconceptions, 2% did not know the concept, and 82% knew the concept. This percentage shows that the video-based Model of Education Reconstruction (MER) and practicum can improve students conceptual understanding on the topic of anaerobic respiration.
Uji Aktivitas Antioksidan menggunakan Metode DPPH (2,2-Difenil-1-Pikrilhidrazil) Terhadap Ekstrak Daun Kunyit (Curcuma domestica) Hadirama, Khanna; Wardana, Rendy Wikrama; Nursa’adah, Euis Wikrama; Ruyani, Aceng Wikrama; Firdaus, M. Lutfi
BIOEDUSAINS:Jurnal Pendidikan Biologi dan Sains Vol 7 No 2 (2024): Bioedusains: Jurnal Pendidikan Biologi dan Sains
Publisher : Institut Penelitian Matematika, Komputer, Keperawatan, Pendidikan dan Ekonomi (IPM2KPE)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31539/bioedusains.v7i2.11507

Abstract

This study aimed to identify the antioxidant content in turmeric leaf extract using the DPPH (2,2-diphenyl-1-picrylhydrazyl) method. The tested concentrations include 200 ppm, 150 ppm, 100 ppm, 50 ppm, 25 ppm, and 12.5 ppm, with absorbance measurements conducted using a UV-Vis Spectrophotometer. Data were analyzed by calculating the percentage of antioxidant activity based on the absorbance values of each concentration. Subsequently, the IC50 value was determined using a nonlinear regression equation, representing the relationship between the logarithm of concentration and the percentage of antioxidant activity (inhibition). The results of the study showed that the IC50 value of turmeric leaf extract was 61.88. The conclusion of this study indicates that turmeric leaf extract exhibits strong antioxidant activity. Keywords: Antioxidant, Turmeric Leaves, DPPH, IC50