Produksi selulase dengan bacillus amyloliquefaciens bpptcc - rk2 dan rekombinan egrk2 berbasis tandan kosong kelapa sawit: pengaruh ph dan suhu serta uji aktivitas = Production of cellulase with bacillus amyloliquefaciens bpptcc - rk2 and egrk2 recombinant from oil palm empty fruit bunches effect of ph and temperature and activity study / Lina Putri Ariyani