Eucalyptus is one of the plants used in the pulp and paper industry, and their leaves are known as forest harvesting waste that potential to produce essential oils. This research aimed to examine the physicochemical profiles of Eucalyptus pellita leaf essential oils grown in East Kalimantan and their potential antibacterial activity. The essential oils distilled using water and steam distillation methods. Analysis of physicochemical profiles from this oil included yield, colour, refractive index, solubility in alcohol, and chemical compositions by GC-MS. Antibacterial activity assayed by agar diffusion method against Streptococcus sobrinus and S. mutans. The results showed that E. pellita oil's physicochemical profile was 0.86% of yield, 1.465 of refractive index, and solubility in alcohol was 1:1. Chemical components contained in E. pellita oil dominated by β-pinene (33.49%), patchouli alcohol (13.77%), 1,7,7trimethyl-bicyclo[2.2.1]hept-2-ene (9.81%), eucalyptol (1,8-Cineole) (6.7%), and trans-β-caryophyllene (6.7%). This oil was active to inhibit all bacterias' growth in a range of 14.78-22.33 mm against S. sobrinus and ranging from 14.00 mm to 52.00 mm against S. mutans. This forest harvesting waste potential to develop as a new source of essential oil (eucalyptol oil).

Cajuput oil, which comes from the Melaleuca, is one of the NTFPs that is widely used for various health or pharmaceutical products so that it is a product that is in great demand. This study aimed to measure the yield and analyze the physical properties of M. leucadendra L. essential oil which comes from Paser, East Kalimantan. Samples were taken from 4 different locations, namely Rantau Panjang, Jone, Padang Pangrapat and Pondong Baru. Essential oils were obtained from distillation process using the water and steam method. The physical characteristics of essential oils were analyzed including visual color and refractive index using a hand refractometer. The results of M. leucadendra L. oil distillation from 4 locations, namely Rantau Panjang, Jone, Padang Pangrapat and Pondong Baru. showed the various yields, among others, 0.030%, 0.066%, 0.104% and 0.031%. The color of the essential oil observed also varied from yellow to orange and the refractive index range obtained was 1,429-1,450. The results of this study have the potential as a new source of cajuput oil originating from East Kalimantan, however further research is needed to find out about the appropriate distillation technique in order to increase the yield of M. leucadendra essential oil.