Pengaruh reduksi roasting dan konsentrasi leaching asam sulfat terhadap recovery nikel dari bijih limonit = Recovery of nickel using limonite ore: the effect of reduction roasting and sulphuric acid at various concentration

Pengaruh konsentrasi lixiviant dan waktu pelindian bijih malasit dengan ammonium bikarbonat = Effect of lixiviant concentration and leaching time malachite ore in ammonium bicarbonate

Analisis pengaruh konsentrasi NaOH pada proses Bayer terhadap ekstraksi bijih nepheline = Effect of NaOH concentration in Bayer process on extraction of nepheline ore in Bayer process

Pengaruh temperatur pada proses bayer terhadap ekstraksi alumina pada bijih nepheline = Temperature effects in bayer process for extracting alumina in nepheline ore

Pengaruh laju korosi dengan penambahan teh bunga rosella sebagai inhibitor organik pada baja karbon rendah di lingkungan NaCl 3.5 % dengan metode polarisasi = Effect of corrosion rate with the addition of rosella tea for organic inhibitors on low carbon steel in 3.5% NaCl environment with polarization method