Comparison of remaining coal-burning ash-based on cd, pb, and hg concentration at different temperatures : A case study in aceh province

by Gani, Asri, Erdiwansyah, Erdiwansyah, Sardjono, Ratnaningsih Eko, Mariana, Mariana, Rizalman, Mamat
Published 2022

Sintesis dan penggunaan Tetramer Siklis seri Kaliksresorsinarena, Alkoksikaliksarena, dan Alkenilkaliksarena untuk adsorpsi kation logam berat

by , SARDJONO, Ratnaningsih Eko, , Promotor Prof.Dr. Hardjono Sastrohamidjojo
Published 2007

The effect of oxygenated turpentine oil additive in diesel fuel on the performance and emission characteristics in one-cylinder di engines

by Kadarohman, Asep, Khoerunnisa, Fitri, Syazwana, Sapee, Sardjono, Ratnaningsih Eko, Izuan, Izzudin, Hendrawan, ., R., Mamat, Ahmad Fitri, Yusop, Erdiwansyah, ., Yusaf, Talal
Published 2021