This study aims to develop teaching materials and guidebooks in making learning videos with a problem based learning model based on the VivaVideo application, the theme of Caring for Animals and Plants in Class II SDN 05 Indralaya, with the aim of knowing the validity of the product of teaching materials and guidebooks, the feasibility of the manual. , and the attractiveness of teaching materia…
Telah dilakukan penelitian tentang modifikasi kitosan menjadi komposit kitosanMnFe2O4 sebagai adsorben zat warna metil violet 2B. Kitosan dan komposit kitosan-MnFe2O4 dikarakterisasi dengan spektrofotometer FTIR dan SEM-EDS. Komposit kitosan-MnFe2O4 digunakan untuk menyerap zat warna metil violet 2B dengan variabel konsentrasi (120, 125, 130, 135, 140 dan 145 mg L-1), waktu kontak (30, 50, …