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All Journal Orbital: Jurnal Pendidikan Kimia Journal Of Research and Education Chemistry (JREC)
Jumriana Rahayuningsih
Universitas Islam Kuantan Singingi
Chemical Engineering, Chemistry & Bioengineering Chemistry Education

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PERBANDINGAN HASIL BELAJAR KIMIA SISWA DENGAN MODEL PROBLEM BASED LEARNING DAN THINK PAIR SHARE PADA MATERI KELARUTAN DAN HASIL KALI KELARUTAN Gisna Wira; Nofri Yuhelman; Jumriana Rahayuningsih
Orbital: Jurnal Pendidikan Kimia Vol 3 No 2 (2019): Orbital: Jurnal Pendidikan Kimia
Publisher : Chemistry Education Department of Education and Teaching Faculty

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19109/ojpk.v3i2.4903

Abstract

This study aims to determine whether there is a significant difference between student chemistry learning outcomes in the solubility material and solubility results applying the Problem Based Learning learning model and Think Pair Share learning model in the solubility material and solubility results in class XII IPA SMA Negeri 1 Pangean. This research uses a quantitative approach. This type of research is Quasi experimental research (quasi-experimental) with a design that is Posttets Only, Non Equivalent Control Group Design. The population in this study were students of class XI IPA of SMA Negeri 1 Pangean which were divided into 2 classes, namely class XI IPA 1 and XI IPA 2. The sampling technique was cluster random sampling. Data collection techniques used are observation and tests. The instrument used in this study was a test namely Posttest. The data analysis technique used is the Non-parametric Mann Whitney U Test. The results of data analysis concluded the significance value = 0.278. Because the significance is> 0.05 then Ho is accepted. So it can be concluded that there is no difference in student learning outcomes with the learning model Problem Based Learning and Think Pair Share on the solubility material and the solubility results in class XI Science in SMA Negeri 1 Pangean.
ANALISIS VITAMIN C PADA BUAH JERUK PASAMAN UNTUK MENINGKATKAN IMUNITAS TUBUH PADA MASA PANDEMI : ANALISIS VITAMIN C Jumriana Rahayuningsih; Vivi Sisca; Eliyarti Eliyarti
Journal of Research and Education Chemistry Vol. 4 No. 1 (2022): APRIL
Publisher : UIR Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (221.042 KB) | DOI: 10.25299/jrec.2022.vol4(1).9363

Abstract

Vitamin C is the best antioxidant known to have benefits to boost immunity. One of the fruits that contain vitamin C is the Pasaman orange. Pasaman orange is a fruit that is a flowering plant with members of the Citrus clan from the Rutaceae tribe (orange-orange tribe). Pasaman oranges were analyzed for their vitamin C content in order to increase the community's immunity during the covid-19 pandemic. The method used is a laboratory experiment with the iodometric method. The result is that Pasaman oranges contain high levels of vitamin C, with the average vitamin C levels in the Pasaman oranges being 10.22%, 11.18% and 10.38% respectively, while the average vitamin C levels in the Pasaman oranges were 10.59%. And during this pandemic, we should consume a lot of food and fruit with vitamin C to increase the body's immunity, so that it can be developed to the next stage of further and more effective research.
Co-Authors Eliyarti Eliyarti Gisna Wira Nofri Yuhelman Vivi Sisca