Riyanto, Riyanto Riyanto, Dept. of Chemistry UII yogyakarta, Indonesia

• The 1st International Conference on Science, Mathematics, Environment and Education 2017 - Other
  Simple Preparation of Rice Husk Activated Carbon (RHAC) and Applications for Laundry and Methylene Blue Wastewater Treatment
  Abstract
• The 1st International Conference on Science, Mathematics, Environment and Education 2017 - Other
  Validation Method for Determination of Cholesterol in Human Urine with Electrochemical Sensors Using Gold Electrodes
  Abstract