Vol. 12 No. 2 (2020): August

Articles

• Identification of metal content in food using gravimetric and iodometric methods: The case on children's food

  Nelius Harefa, Saronom Silaban

  52-61

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• Determination antioxidant activities methanol extracts of bangun-bangun (Coleus amboinicus L.) Leaves with DPPH method

  Kasta Gurning

  62-69

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• Phytochemical screening of bunga rosella (Hibiscus sabdariffa L) and antimicrobial activity test

  Hermawan Purba, Helen Anjelina Simanjuntak, Risanti Situmorang

  70-78

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• Sensitivity of two-tier and three-tier tests in detecting student™s misconceptions of chemical bonding

  Ebiati Ebiati, Asrial Asrial, Muhammad Haris Effendi-Hasibuan

  79-87

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• The effect of portfolio-based learning models and self-regulated learning on student™s creative thinking skills on acid and base materials

  Rini Alfiahas, Asrial Asrial, Damris Muhammad

  88-94

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• The effect of the flipped classroom approach and self-efficacy on a guided inquiry on students' creative thinking skills

  Dian Indah Lestari, Muhammad Haris Effendi-Hasibuan, Damris Muhammad

  95-105

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