Articles

• Uncertainty Estimation of the Fe Content Measurement in the Clean Water Using UV- Vis Spectrophotometer

  Adi Syahputra

  1-5

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  DOI: https://doi.org/10.33019/jstk.v1i1.1141
  Abstrak views: 997 , PDF downloads: 1902
• Function Groups Analysis of Wood-Plastic Composite with Plasctic Waste and Pelawan’s Wood Sawdust (Tristaniopsis merguensis)

  Ristika Oktavia Asriza, Diah Humaira, Sri Hawa T Insan, Zomi Zomi

  6-9

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  DOI: https://doi.org/10.33019/jstk.v1i1.1179
  Abstrak views: 618 , PDF downloads: 489
• Total Phenolic and Antioxidant Capacity of Acetone Extract of Tristaniopsis merguensis Leaves

  Occa Roanisca, Robby Gus Mahardika, Fajar Indah Puspita Sari

  10-13

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  DOI: https://doi.org/10.33019/jstk.v1i1.1274
  Abstrak views: 790 , PDF downloads: 673
• Antioxidant Activity Test for Rukam Fruit (Flacourtia rukam) Of Maseration Extract

  Inas Fadiyah, Iin Lestari, Shelly Victory

  14-19

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  DOI: https://doi.org/10.33019/jstk.v1i1.1417
  Abstrak views: 1302 , PDF downloads: 2185
• Isolation of Essential Oils from Essential Roots (Vetiveria zizanoides L.) with Preparation Using Liquid Nitrogen

  Arif Ashari, Ciptati Ciptati

  20-24

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  DOI: https://doi.org/10.33019/jstk.v1i1.1418
  Abstrak views: 1272 , PDF downloads: 1566
• The Adsorption Efficiency of Lead From Post-Tin Mining Water using Nanomagnetic Fe3O4/Chitosan Portunus pelagicus shells

  Verry Andre Fabiani, Eva Julianti, Ary Samsiar, Ristika Oktavia Asriza

  25-28

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  DOI: https://doi.org/10.33019/jstk.v1i1.1271
  Abstrak views: 720 , PDF downloads: 616