Eco-friendly utilization of chitosan from shrimp shells for used lubricating oil cleaning by Muhammadin Hamid, Indri Dayana, Dewi Sholeha, Muhammad Fadlan Siregar, Indra Roza, Junaidi, Martha Rianna, Hadi Wijoyo

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Porous hard carbon derived from coconut biomass waste as electrode material for supercapacitor by Muhammadin Hamid, Indri Dayana, Habib Satria, Dadan Ramdan, Junaidi, Muhammad Fadlan Siregar, Dewi Sholeha, Juliaster Marbun, Hadi Wijoyo

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