Penetration Test for Combination Ointment Preparation of Snakehead Fish Water Phase Extract (Channa striata) and Kelulut Honey (Trigona Sp.) with Determination of Protein Content Using the Biuret Method December 19, 2022 Penetration Test for Combination Ointment Preparation of Snakehead Fish Water Phase Extract (Channa striata) and Kelulut Honey (Trigona Sp.) with Determination of Protein Content Using the Biuret Method