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All Journal Majalah Ilmiah Biologi BIOSFERA: A Scientific Journal Pendas : Jurnah Ilmiah Pendidikan Dasar
Husamah Husamah
Fakultas Keguruan dan Ilmu Pendidikan Universitas Muhammadiyah Malang
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Environmental Science Other

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Aktivitas Antioksidan Ekstrak Fenol Daun Gayam (Inocarpus fagiferus Fosb) Dwi Marga Lestari; Nurul Mahmudati; Sukarsono Sukarsono; Nurwidodo Nurwidodo; Husamah Husamah
Majalah Ilmiah Biologi BIOSFERA: A Scientific Journal Vol 35, No 1 (2018)
Publisher : Fakultas Biologi | Universitas Jenderal Soedirman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.mib.2018.35.1.596

Abstract

This study aims to determine the total phenolic content and antioxidant activity in gayam leaf extract (Incarpus fagiferus Fobs). The research method used is a quasi-experiment that aims to predict the situation to be achieved through actual experiments but no treatment. The sample used is old gayam leaves, with the characteristic of dark green leaf and rough leaf surface. The process of preparing simplicia, ie preparing fresh gayam leaves, dried in an oven temperature 45-50oC, and then dried to produce gayam leaf powder. Samples were extracted with methanol solvent and ethanol for 5 days. The total phenol assay method uses Folin-Ciocalteau method and antioxidant activity test using DPPH free radical retardation method (1,1-diphenyl-2-picrylhydrazyl). The results showed that the total phenolic content of gayam leaf extract with ethanol and methanol solvent was 313,704 GAE (Gallic Acid Equivalent) and 273,913 GAE, respectively. Antioxidant activity as a free antidote to free radical DPPH is known to be valued with IC50 (inhibitory concentration).
PENERAPAN MODEL PROJECT BASED LEARNING UNTUK MENINGKATKAN KREATIVITAS DAN HASIL BELAJAR IPAS SISWA KELAS 4 SDN SUMBERSARI 2 KOTA MALANG Mahariska Anjar Palupi; Husamah Husamah
Pendas : Jurnal Ilmiah Pendidikan Dasar Vol. 8 No. 1 (2023): Volume 08, Nomor 01, Juni 2023
Publisher : Program Studi Pendidikan Guru Sekolah Dasar FKIP Universitas Pasundan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23969/jp.v8i1.8155

Abstract

The low learning outcomes of students at school are influenced by the low creativity of students. This study aims to increase creativity and science learning outcomes in class IV through the Project Based Learning model. This type of research is classroom action research. Data collection techniques used in this study are observation, interviews, tests, and documentation. The data analysis technique used is descriptive qualitative. The subjects of this study were fourth grade students at SDN Sumbersari Malang City with a total of 24 students. The improvement obtained from this study was an increase in the percentage of students' creativity in science learning from 0% to 4.16% in cycle I and then to 33.33% in the very creative category. Then, in the creative category there was an increase in percentage from 16.67% to 29.16% in cycle I and to 58.33% in cycle II. In addition, there was a decrease in the percentage in the quite creative category from 29.20% to 20.83% in cycle I and to 8.33% in cycle II. Meanwhile, in the non-creative category, the percentage decreased from 54.20% to 25.00% in cycle I and to 4.16% in cycle II. The results of the study also showed an increase in student learning outcomes from 37.50% to 58.33% in cycle I and to 83.33% in cycle II. Based on the results of this study, it can be concluded that the application of the Project Based Learning model is able to increase the creativity and learning outcomes of class IV students in science subjects.
Co-Authors Dwi Marga Lestari Mahariska Anjar Palupi Nurul Mahmudati Nurwidodo Nurwidodo Sukarsono Sukarsono