Vol. 13 No. 4 (2025): August 2025

Articles

• Effect of Drying Temperature Variation on the Antioxidant Activity Ethanol Extract of Cocoa Bean (Theobroma cacao L.) with ABTS [2,2-azino-bis(3-ethylbenzotiazolin-6-sulphonic acid)] Method

  Agung Ari Chandra Wibawa, Dewa Ayu Ika Pramitha, Ni Made Sukma Sanjiwani, I Wayan Surya Rahadi, I Wayan Wisma Arandika

  724-731

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  DOI : https://doi.org/10.33394/hjkk.v13i4.17409
  Abstract View: 0 | PDF Download: 86

• Design and In silico Study of Amides Containing Heterocyclic Nitrogen as Potent Antituberculosis Agent

  First Ambar Wati, Rizqi Nur Afifah, Mohammad Wisnu Wardana

  732-742

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  DOI : https://doi.org/10.33394/hjkk.v13i4.16895
  Abstract View: 0 | PDF Download: 48

• Synthesis and Characterization of Porous Polymer as a Support Matrix for Lipase Immobilization

  Erwanto Erwanto, Arya Ananda Saputra, Muhammad Rakha Abimanyu

  743-751

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  DOI : https://doi.org/10.33394/hjkk.v13i4.16864
  Abstract View: 0 | PDF Download: 42

• Validity of the Corporate Edition Flip PDF Assisted Learning E-Module for Improving Students' Critical Thinking Skills

  Salsabila Yulia Imara, Rusmini

  751-765

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  DOI : https://doi.org/10.33394/hjkk.v13i4.16830
  Abstract View: 0 | PDF Download: 47

• Literature Review: Bioactivity of Alkaloids from Various Plants that Have Potential as Antibacterials

  Usman, Kevin Jeremia Hutauruk, Nasya Hikmatul Rabiah, Intan Aulia Rahmadani, Esti Miranda

  765-797

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  DOI : https://doi.org/10.33394/hjkk.v13i4.16734
  Abstract View: 0 | PDF Download: 88

• Analyzing the Secondary Metabolites and Pharmacological Activities of Solanum ferox: A Systematic Review

  Sistha Citra Depasthika, Izory Roman Riyanto, Masriani, Rini Muharini

  798-808

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  DOI : https://doi.org/10.33394/hjkk.v13i4.17007
  Abstract View: 0 | PDF Download: 43

• Variation of Polymer Matrix On the Quality of Bioplastic from Cassava Peel Waste from Tapai Industry in Bogor

  Novia Amalia Sholeha, Nada Ghaida Muthmainah, Rifky Ardiansyah Robyano, Halida Sophia, Indri Susanti, Nurina Rizka Ramadhania

  809-828

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  DOI : https://doi.org/10.33394/hjkk.v13i4.16975
  Abstract View: 0 | PDF Download: 59

• Effect of Aloe vera Gel Formulation and Jatropha multifida L Leaf on the Growth of Staphylococcus aureus Bacteria

  I Made Putra Pramaditya Dektra, Iswari Pauzi, Lalu Srigede, Yunan Jiwintarum

  829-834

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  DOI : https://doi.org/10.33394/hjkk.v13i4.17104
  Abstract View: 0 | PDF Download: 27

• Environmental Chemistry in Context: A Digital Supplement on Coconut Shell Briquettes

  Nur Anjar Astuti, Hairida, Erlina

  835-851

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  DOI : https://doi.org/10.33394/hjkk.v13i4.16723
  Abstract View: 0 | PDF Download: 29

• Analysis of Multiple Representation Ability of Chemistry Education Students on Hydrocarbon

  Rizki Furqanul Ichsan, Eny Enawaty, Erlina

  852-860

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  DOI : https://doi.org/10.33394/hjkk.v13i4.16749
  Abstract View: 0 | PDF Download: 41

• Investigation Science Process Skills Among Chemistry Education Student Through the Law of Mass Conversation Experiment

  Nur'aini, Eny Enawaty, Erlina

  861-868

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  DOI : https://doi.org/10.33394/hjkk.v13i4.16897
  Abstract View: 0 | PDF Download: 85

• Development of a Tutorial Video for Creating Digital Based Card Game Media

  Fadhil Alwa Faridy, Eny Enawaty, Rini Muharini

  869-879

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  DOI : https://doi.org/10.33394/hjkk.v13i4.16889
  Abstract View: 0 | PDF Download: 42

• The Impact of Metacognitive Awareness on Retention of Solubility and Solubility Product Equilibrium Concepts

  Marisa, Erlina, Maria Ulfah

  880-893

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  DOI : https://doi.org/10.33394/hjkk.v13i4.16810
  Abstract View: 0 | PDF Download: 35

• Students’ Learning Engagement in the Topic of Atomic Concepts and the Periodic Table

  Roseana Febriyani, Erlina, Eni Mayasari

  894-904

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  DOI : https://doi.org/10.33394/hjkk.v13i4.16944
  Abstract View: 0 | PDF Download: 48

• Development of Digital Interactive Modules for Teaching Chemical Bonding of Grade XI Senior High School Students

  Irfani Winda Sari, Eny Enawaty, Erlina

  905-920

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  DOI : https://doi.org/10.33394/hjkk.v13i4.16805
  Abstract View: 0 | PDF Download: 32

• A Description of Formal Reasoning Ability and Its Relationship with Chemistry Learning Outcomes of Grade XI Senior High School Students

  Lusia Santi, Erlina, Rachmat Sahputra

  921-931

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  DOI : https://doi.org/10.33394/hjkk.v13i4.17118
  Abstract View: 0 | PDF Download: 6

• Analysis of Students’ Learning Difficulties in Science on the Topic of Additive Substances at Junior High School

  Lala Sari, Eny Enawaty, Rachmat Sahputra

  931-941

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  DOI : https://doi.org/10.33394/hjkk.v13i4.17120
  Abstract View: 0 | PDF Download: 8

• Analysis of the Desorption Capacity of Pb2+ and Cu2+ Metals on Silica and Silica-Chitosan Adsorbents

  Faizul Puspitasari, La Harimu, Wa Ode Mulyana

  942-950

  DOI : https://doi.org/10.33394/hjkk.v13i4.16781
  Abstract View: 0 |