Vol. 9 No. 1 (2026): JUNE 2026

Articles

• APPLICATION OF HEMATITE SYNTHESIZED FROM IRON RUST WASTE AS A PIGMENT DYES FOR COTTON TEXTILE PRINTING

  Asiyah Nurrahmajanti (Politeknik STTT Bandung, Indonesia)
  Octianne Djamaludin (Politeknik STTT Bandung, Indonesia)
  Wulan Safrihatini Atikah (Politeknik STTT Bandung, Indonesia, Indonesia)

  1-9

  Abstract View : 0

  PDF downloads: 0

  DOI : 10.21831/ijoce.v9i1.97711

  • PDF

• ANTIOXIDANT ACTIVITY AND TOXICITY OF THE ETHYL ACETATE AND DICHLOROMETHANE FRACTIONS OF THE ETHANOL EXTRACT OF SIKKAM LEAVES (Bischofia javanica Blume)

  Putu Widiari (Universitas Pendidikan Ganesha, Indonesia)
  I Wayan Muderawan (Universitas Pendidikan Ganesha, Indonesia)
  Rachmadhani Rachmadhani (Universitas Pendidikan Ganesha, Indonesia)

  10-17

  Abstract View : 0

  PDF downloads: 0

  DOI : 10.21831/ijoce.v9i1.97531

  • PDF

• Well Water Quality Assessment Around Ciangir Landfill, Tasikmalaya City, Using the Pollution Index

  Tegar Muhammad Mikdar (Universitas Muhammadiyah Tasikmalaya, Indonesia)
  Melly Mellyanawaty (Institut Teknologi Yogyakarta, Indonesia)

  18 - 24

  Abstract View : 0

  PDF downloads: 0

  DOI : 10.21831/ijoce.v9i1.97570

  • PDF

• Recent Advances in the Development of Transition Metal-Doped TiO2-Doped Photocatalysts and Electrocatalysts for Hydrogen Evolution Reactions: A Systematic Review

  Misriyani Misriyani (Alkhairaat University, Indonesia)
  Emil Hardiansyah (Alkhairaat University, Indonesia)
  Isti Yunita (Universitas Negeri Yogyakarta, Indonesia)

  25 - 33

  Abstract View : 0

  PDF downloads: 0

  DOI : 10.21831/ijoce.v9i1.96462

  • PDF

• Yield, Antioxidant Activity, and Toxicity of Ethanol Extracts from Air- and Sun-Dried Sikkam Leaves (Bischofia javanica Blume) Obtained by Maceration and Soxhlet Extraction

  I Wayan Muderawan (Universitas Pendidikan Ganesha, Indonesia)
  Nia Astria Br. Saragih (Universitas Pendidikan Ganesha, Indonesia)
  I Wayan Mudianta (Universitas Pendidikan Ganesha, Indonesia)

  34 - 46

  Abstract View : 0

  PDF downloads: 0

  DOI : 10.21831/ijoce.v9i1.97771

  • PDF

• Development of a Heyzine E-Module Integrating Cassava Fermentation Ethnoscience for Acid-Base Chemistry

  Kharisma Eka Yulianti Eka (Universitas Lampung, Indonesia)
  Bayu Saputra (Universitas Lampung, Indonesia)
  Gamilla Nuri Utami (Universitas Lampung, Indonesia)

  47 - 54

  Abstract View : 0

  PDF downloads: 0

  DOI : 10.21831/ijoce.v9i1.99354

  • PDF

• Analysis of Amylase, Protease, and Peroxidase Enzymes in Eco-Enzymes Based on Mango Peel, Pineapple, and Cabbage Using UV-Vis Spectrophotometry

  Istika Listyana (Universitas Negeri Yogyakarta, Indonesia)
  Regina Tutik Padmaningrum (Universitas Negeri Yogyakarta, Indonesia)

  55-65

  Abstract View : 0

  PDF downloads: 0

  DOI : 10.21831/ijoce.v9i1.100300

  • PDF

• Analysis of Lead (Pb) Levels in Consumption Fish on the Pentadu Coast East of Gorontalo Province

  Sri Layla Putri Ishak (Universitas Negeri Gorontalo, Indonesia)
  Dewi Wahyuni K. Baderan (Universitas Negeri Gorontalo, Indonesia)
  Syam S. Kumaji (Universitas Negeri Gorontalo, Indonesia)
  Djuna Lamondo (Universitas Negeri Gorontalo, Indonesia)
  Regina Valentina Aydalina (Universitas Negeri Gorontalo, Indonesia)

  66-73

  Abstract View : 0

  PDF downloads: 0

  DOI : 10.21831/ijoce.v9i1.100388

  • PDF

• Identification of the Active Compound of Ethyl Acetate Fraction of Yellow Root Extract (Fatoua pilosa Gaudich)

  Maria Magdalena Nona Motu Tukan (Institute of Teacher Training and Technology Larantuka, Indonesia)

  74-79

  Abstract View : 0

  PDF downloads: 0

  DOI : 10.21831/ijoce.v9i1.98479

  • PDF