Rohazila M.H.Nazlina I.Yaacob W.A.2024-05-292024-05-29201497807400000000094243X10.1063/1.48952612-s2.0-85063832418https://www.scopus.com/inward/record.uri?eid=2-s2.0-85063832418&doi=10.1063%2f1.4895261&partnerID=40&md5=8efdf1d6f50bdb80cb85f0283ed8d745https://oarep.usim.edu.my/handle/123456789/9955A study was carried out to isolate and identify the active compounds from Melastoma malabathricum stem bark that exhibit anti-biofilm and anti-adherence activities against Streptococcus mutans. Purification of the active compounds from the stem bark extract was performed via silica gel chromatography to produce 12 fractions. Further fractionation of fraction 9 by high performance liquid chromatography (HPLC) produced 21 sub fractions. All the sub fractions were subjected to thin layer chromatography (TLC) bioautography as preliminary screening to determine anti bacterial activity. TLC-bioautography showed that sub fraction 18 (SF18) demonstrated large inhibited zone against S. mutans. Gas chromatography mass spectrometry (GCMS) was used to identify the active compounds in SF18. Fraction SF18 revealed 27 compounds such as hexanoic acid, 8-methyl-1-undecene, propanenitrile, and 1-decene. Anti-biofilm and anti-adherence activities were determined using crystal violet and glass surface assays respectively. The concentrations that produced 50% reduction in anti-biofilm and anti-adherence activities were 1.88 mg/ml and 3.75 mg/ml respectively. � 2014 AIP Publishing LLC.en-USAnti-biofilm and anti-adherence activityMelastoma malabathricumConference Paper5575611614