1. The effectivity of red algae as biosorben to reduce the effect of laboratory wastewater (Efektifitas Alga Merah (Eucheuma Cottoni) Sebagai Biosorben Dalam Mengurangi Dampak Limbah Cair Laboratorium) ; Sunarti Sunarti, Meske Ferdinandus. 2. The arduino based prototype of handsanitizer tool and automatic mask feeder (Prototipe Alat Handsanitizer Dan Masker Feeder Otomatis Berbasis Arduino) …