Alotrop Jurnal

University of Bengkulu, FKIP pendidikan kimia, Researcher

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Jurnal Alotrop ber ISSN 2252-8075 adalah majalah ilmiah resmi yang diterbitkan oleh Program Studi Pendidikan Kimia Jurusan Pendidikan MIPA Fakultas Keguruan dan Ilmu Pendidikan Universitas Bengkulu, sebagai sumbangannya kepada pengembangan Ilmu Kimia dan Pendidikan Kimia yang diterbitkan dalam Bahasa Indonesia yang memuat hasil-hasil penelitian, telaah/tinjauan pustaka, kasus lapangan atau gagasan dalam bidang ilmu Kimia dan Pendidikan Kimia

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AKTIVITAS ANTIOKSIDAN DAN ANTIBAKTERI EKSTRAK DAUN Strobilanthes crispus Bl (Keji Beling) ) TERHADAP Staphylococcus aureus

by Alotrop Jurnal and Sukaina Adibi

[ANTIXOXIDANT AND ANTIBACTERIA ACTIVITIES OF Strobilanthes crispus Bl (Keji Beling) EXTRACT AGAIN... more [ANTIXOXIDANT AND ANTIBACTERIA ACTIVITIES OF Strobilanthes crispus Bl (Keji Beling) EXTRACT AGAINST Stapylococcus Aureus AND Escherichia coli] Strobilanthes crispus Bl (Keji Beling) is one of herbs that has been used for the treatment of several types of diseases such as kidney stones, gall stones, diabetes, cholesterol, tumors and others. The purpose of this study was to determine the value of antioxidant activity (IC 50) and antibacterial activity of ethanol extract of leaf vermicelli against Staphylococcus aureus and Escherichia coli bacteria. Antioxidant test was performed using DPPH method and vitamin C was used as standard. While the antibacterial activity test done by paper disc method. Amphicillin is used as a positive control and aquades as a negative control. Ethanol extract of leaf vermicelli able to counteract free radical of DPPH with IC 50 value that is: 102.85 ppm and IC 50 value from vitamin C as comparative solution equal to 19.268 ppm. The results of antibacterial inhibition test of ethanol extract of vile leaf on S. aureus bacteria with extract concentration of 20% (0 mm), 40% (2.5 mm), 60% (3.25 mm), and 80% (4.75) were included Weak and 100% (5.75 mm) including Medium, and E.coli antibacterial inhibition in the extract contacts of 20% (0 mm), 40% (2 mm), 60% (2.25 mm), 80% (4.25 mm) were weak, and 100% (5.25 mm) including moderate. So it is known that the extract of ethanol leaves vile at 100% concentration can inhibit the growth of S. aureus bacteria and E. coli bacteria characterized by the formation of the largest clear zone diameter at the concentration. But the strength of its bacteria is still not effective to inhibit the growth of both test bacteria. Abstrak Strobilanthes crispus Bl (Keji Beling) merupakan salah satu tanaman herbal yang telah digunakan untuk pengobatan beberapa jenis penyakit antara lain batu ginjal, batu empedu, diabetes, kolesterol, tumor dan lain-lain. Tujuan dari penelitian ini adalah untuk menentukan nilai aktivitas antioksidan(IC 50) dan aktivitas antibakteri dari ekstrak etanol daun Strobilanthes crispus Bl terhadap bakteri Staphylococcus aureus dan Escherichia coli. Uji antioksidan dilakukan menggunakan metoda DPPH dengan vitamin C sebagai standar, dan uji aktivitas antibakteri dilakukan dengan metoda kertas cakram menggunakan Amphisilin sebagai kontrol positif dan aquades sebagai kontrol negatif. Ekstrak etanol daun S. crispus Bl mampu menangkal radikal bebas DPPH dengan nilai IC 50 yaitu: 102.85 ppm dan nilai IC 50 dari vitamin C sebagai larutan pembanding sebesar 19.268 ppm. Hasil uji daya hambat antibakteri ekstrak etanol daun S.crispus Bl pada bakteri S. aureus dengan konsentrasi ekstrak 20% (0 mm)

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