Vol 11, No 2 (2026)

	Effect of Oxalic Acid Addition on Hardness and Pore-like surface feature Morphology of AA7075 Oxide Layer via Hard Anodizing Rony Pasonang Sihombing, Mentik Hulupi, Nina Puspita, Jasinta Putri Alamsari	PDF 205-219
	Natural Paper-Based Colorimetric Indicator from Red Dragon Fruit for Detecting Fish Freshness Using RGB Analysis Lusiani Dewi Assaat, Clara Shabrina Parameswary, Nela Fatmasari, Isriyanti Affifah, Irhamni Irhamni, Ihsan Budi Rachman	PDF 220-232
	Synthesis and Characterization of Flower-Like Zinc Oxide Nanostructures by a Simple Low-Temperature Precipitation Method Hasna Noer Agus Yayat, Witri Aini Salis, Muhamad Taufik Ulhakim	PDF 233-247
	Acacia mangium Leaf Extract as a Green Corrosion Inhibitor for Mild Steel in Sulfuric Acid: Gravimetric Evaluation, Surface Characterization, and Quantum Chemical Descriptor Analysis Dila Mardiah Permata Sinta, Lidia Gusfi Marni, Diah Riski Gusti, Siti Zulaiha, Anggela Tria Amanda, Emriadi Emriadi, Imelda Imelda	PDF 248-266

	Green-Synthesized Silver Nanoparticles from Ocimum sanctum Leaf Extract for a Chitosan–Starch Colorimetric Hg2+ Sensor Yussi Pratiwi, Fuad Alfan Asyifa, Agus Darmawan, Harfi Amania Khansa, Elsa Vera Nanda, Baiq Amelia Riyandari, Aneesha Sheik Musthafa Ajeetha	PDF 267-286
	An RP-HPLC-UV Method for the Determination of Inorganic Mercury (II) via Sulfur-Donor Ligand Complexation and Ion-Pair Retention Tahir Bakhsh, Nazhifa Jacinda Maheswari Abidin, Hermin Sulistyarti, Ani Mulyasuryani	PDF 287-303

	Toxicity and Active Compound Content of Cardamom Fruit Extract (Wurfbainia compacta Sol. ex Maton) Nur Nunu Prihantini, Fransiska Sitompul, Erica Gilda Misnawati Simanjuntak, Berlian Feodora Pangaribuan	PDF 304-319
	Antibacterial Activity of Planchonia valida Against Methicillin-Resistant Staphylococcus aureus (MRSA): Phytochemical Profiling, LC-MS Analysis, and Molecular Docking Study Suryelita Suryelita, Muhammad Habibul Ikhsan, Riga Riga	PDF 320-336

	Mapping Students’ Misconceptions on Atomic Structure Using a Four-Tier Diagnostic Test: The Roles of Gender and Learning Styles Napsin Palisoa, Muhamad Fadli, Nurfiah Nurfiah, Noni Noviana	PDF 337-353
	Beyond Correct Answers: Revealing Pseudo-Understanding through Correspondence Analysis of Conceptual Relations and Chemical Representations in Chemical Kinetics Suandi Sidauruk, Ruli Meiliawati, Sisca Alvionita, Triliyansi Triliyansi	PDF 354-370
	Effects of Crocodile Chemistry Lab–Assisted Problem-Based Learning on Students’ Problem-Solving Ability and Scientific Attitude in Thermochemistry Danang Priyadi, Suwardi Suwardi	PDF 371-387