Vol 3, No 1 (2023)

Helium: Journal of Science and Applied Chemistry

DOI: https://doi.org/10.33751/helium.v3i1

Articles

Antimicrobial Activity of The Ethanol Extract of Coffea canephora L. Seeds Against Staphylococcus aureus and Propionibacterium acnes

Siska Elisahbet Sinaga, Matius Paundanan, Maharani Farah Dhifa Dg Masikki, Diana Widiastuti

10.33751/helium.v3i1.7512

Abstract views : 427

Effectiveness Hydroxyapatite from Chicken Eggshells for Adsorption of Chromium (VI) Metal Ion Electroplating Waste

Afifah Nur Ismawati, Ani Iryani, Linda Jati Kusumawadani

10.33751/helium.v3i1.7929

Abstract views : 218

Utilization of Tea Waste Activated by Using Hydrochloric Acid as An Adsorbent for Calcium (II) Ions in Hard Water

Meizaristy Ananta Wuryani, Agus Taufiq, Muhammad Fathurrahman

10.33751/helium.v3i1.7930

Abstract views : 162

Potential of Cassava Peel as Cr Metal Biosorbent in Laboratory COD Waste

Farhan Fatur Rachman, Yulian Syahputri, Sutanto Sutanto

10.33751/helium.v3i1.7932

Abstract views : 182

Comparison of COD Determination Methods FAS Titrimetric with UV-Vis Spectrophotometry

Intan Wulandari, Uswatun Hasanah, Siti Warnasih

10.33751/helium.v3i1.8097

Abstract views : 430

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