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Journal : Jurnal Pembelajaran dan Biologi Nukleus

Application of the Discovery Learning Model to Improve Students' Science Process Skills on Virus Material Sela Restia Tangahu; Ani M. Hasan; Jusna Ahmad; Masra Latjompoh; Yuliana Retnowati; Ilyas Husain
JURNAL PEMBELAJARAN DAN BIOLOGI NUKLEUS (JPBN) Vol 10, No 1 (2024): Jurnal Pembelajaran Dan Biologi Nukleus March 2024
Publisher : Fakultas Keguruan dan Ilmu Pendidikan Universitas Labuhanbatu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36987/jpbn.v10i1.5424

Abstract

Based on the results of a researcher interview with one of the biology teachers at SMAN 3 Gorontalo, science process skillsĀ  have been applied before, but in their implementation they do not get maximum results so that science process skills in students do not develop. The purpose of the study was to improve the science process skills of students who used the Discovery Learning model on virus material. This type of research is descriptive quantitative with Pre-Experimental Design research methods and One group pretest and posttest designs. The subjects in this study were 31 students of grade X-4 SMA Negeri 3 Gorontalo. The indicators of science process skills observed in this study consist of aspects of observing, interpreting, applying concepts, grouping, and communicating. The results obtained the average pretest score was 45.21%, and the average posttest score was 77.75%. From the results of the study, it can be concluded that the science process skills of grade X students of SMA Negeri 3 Gorontalo can be improved through the application of the Discovery Learning model
Analysis of Amylase Activity in Bacteria Isolated from Hot Spring of Pentadio Resort Nur'ain Marton Angio; Aryati Abdul; Syam S. Kumaji; Wirnangsi Din Uno; Yuliana Retnowati; Magfirahtul Jannah
JURNAL PEMBELAJARAN DAN BIOLOGI NUKLEUS (JPBN) Vol 10, No 1 (2024): Jurnal Pembelajaran Dan Biologi Nukleus March 2024
Publisher : Fakultas Keguruan dan Ilmu Pendidikan Universitas Labuhanbatu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36987/jpbn.v10i1.5506

Abstract

The hot spring of Pentadio Resort is one of the geothermal areas likely to be the place of bacteria or microorganisms that can produce amylolytic enzymes. This research aims to analyze bacteria in the Pentadio Resort hot springs that possess the potential to produce amylase enzymes, analyze the characteristics of bacterial isolates that produce amylase enzymes in Pentadio Resort hot springs and determine the types of bacteria that produce amylase enzymes in Pentadio Resort hot springs. The research employs a qualitative and descriptive method. The research involved several methods, including sample collection, media preparation, isolation and selection of thermophilic bacterial isolates, purification of thermophilic bacterial isolates, selection of isolates producing amylase enzymes, identification of selected isolates (motility test, biochemical test, gram staining), and molecular identification. The research yielded seven isolates, and isolate code A6 demonstrated the potential to produce amylase enzymes with a clear zone size of 23,26 mm, bacillus, gram positive, and positive motility. Subsequently, molecular identifidation was carried out in which, based on the results of phylogenetic tree reconstractiopisalate A6 was related to the bacteria Bacillus cereus strain MD 152, which belongs to the Bacillus cereus bacteria