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Plants as medicinal ingredients have potential as antimicrobials and antioxidants, with various molecules that can protect the human body from pathogens and cellular oxidation. This is closely related to the secondary metabolitescontained in these plants. Currently there are several bacteria that are resistant to antibiotics, therefore it is necessary to find an alternative to overcome this resistance by conducting research on medicinal plants. Sekilang (Embeliaborneensis) is a plant that is used by the Dayak tribe in Kalimantan as an ingredient for catching fish, repelling leeches and hair care and does not rule out having medicinal properties. So it is necessary to do research on these plants, especially the bark. The purpose of this study was to determine the antibacterial activity of sekilang bark extract against Propionibacterium acnes and Staphylococcus epidermidis bacteria. Extraction of the active substance was carried out by maceration with ethanol solvent and antibacterial activity test using the disc diffusion method. The results of phytochemicalscreening showed that the bark extract of sekilang contains saponins, flavonoids, alkaloids and tannins. The results of the antibacterial activity test against Propionibacterium acne at a concentration of 2.5%; 5% ; 10% and 20% are 6.5 mm, respectively; 8.36 mm ; 7.5mm; 7.33mm. Antibacterial activity against Staphyllococus epidermidis at a concentration of 2.5%; 5% ; 10% and 20% are 7.0 mm, respectively; 7.7mm; 6.33mm; 7.8mm. It was concluded, that the bark extract of sekilang have antibacterial activity against Propionibacterium acne and Staphyllococus epidermidis with moderate category. The positive control used was clindamycin and the negative control was Dimethyl sulfoxy.

Putat plant (Planchonia valida) is a medicinal plant that grows in Mahulu, East Kalimantan. Empirically putat leaves are used to treat skin diseases and reduce black spots on the face. Characterization is the initial stage to determine the quality of an extract. Non-experimental research was conducted to determine the specific and non-specific characteristics of putat plants. Samples in the form of putat shoots were obtained from Mahulu Long Melaham Village, Long Bagun District, Mahakam Ulu Regency, East Kalimantan. The stages of the research include plant determination, sample collection, processing of simplicia, extraction using maceration methods, specific and non specific extracts characterization. Specific characteristics of putat leaf extract include organoleptic test in the form of thick extract, blackish brown color, characteristic odor, bitter taste, average water soluble extract content of 62.50% and ethanol soluble extract 48.75%. Secondary metabolites of putat leaf ethanol extract are alkaloids, flavonoids, tannins, saponins, and steroids. The non-specific characteristics of putat leaf extract include average water content of 23.00%, ash content of 6.47% and acid insoluble ash content of 0.06%. Keywords: Planchonia valida, Characterization, Ethanol extract