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Hastuti, Erna ORCID: https://orcid.org/0000-0002-2521-9258 (2017) Pengaruh proses aktivasi keratin terhadap performa baterai. Research Report. UIN Maulana Malik Ibrahim Malang, Malang. (Unpublished)
Hastuti, Erna ORCID: https://orcid.org/0000-0002-2521-9258 and Muthmainnah, Muthmainnah (2019) Sintesis dan karakterisasi keratin dengan variasi temperatur aktivasi untuk bahan baterai lithium. Research Report. UIN Maulana Malik Ibrahim Malang, Malang. (Unpublished)
Hastuti, Erna ORCID: https://orcid.org/0000-0002-2521-9258, Mutiara, Z., Hikmah, Utiya and Kurniati, T. (2024) Nitrogen-doped carbon dots derived from green algae and ammonia as photocatalyst material. Jurnal Sains Materi Indonesia, 25 (2). pp. 115-121. ISSN 4111098 (print); 2614087X (online)
Hastuti, Erna ORCID: https://orcid.org/0000-0002-2521-9258, Salsadilla, C, Sari, Y and Hikmah, Utiya (2024) The hydrothermal effect of time and temperature on the synthesis of carbon dots (CDs) from chicken feathers. Presented at ICGT.