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“Studi Variasi Suhu dan Lama Pemanasan dalam Proses Delignifikasi Selulosa Daun Kelapa sebagai Penguat Kertas Kemasan: Study of Temperature Variations and Heating Duration in the Delignification Process of Coconut Leaf Cellulose as a Reinforcement for Packaging Paper”, JBETA, vol. 14, no. 2, Mei 2026, doi: 10.24843/jbeta.2026.v14.i02.p00.