Utilization of Red Dragon Fruit Skin (Hylocereus Costaricensis) as an Indicator of Formalin and Borax in Food Acid-Base, Chemistry, Colour, Food, Health, Science Project|by Reyshan Preface 1.Problem The development of the times produces new ideas and innovations.
Making Liquid Soap From Skin Kapook Tree (Ceiba petandra Gaertn) And Waste Cooking Oil Chemistry, Oil, Plant, Science Project, Soap|by Reyshan Waste Cooking oil is a cooking oil that has been used repeatedly.