Strychnos ligustrina Blume is one of the potential plants for medicine that has been used by the local community in Indonesia for traditional medicine. Some studies showed that S. ligustrina parts had different activities, such as antimalarial, antibacterial, antimicrobial, antioxidant, and anticancer activities. Triterpenoids, phenolics, tannins, alkaloids, and flavonoids were detected in this species. Different plant parts and grow sites may affect the composition of chemical components. Therefore, the present study investigated the chemical components in different parts of S. ligustrina from some grow sites. The chemical components of different plant parts were analyzed by GC-MS and showed 51 compounds in total. The major constituents identified as mome inositol, heptadecene-(8)-carbonic acid-(1), palmitic acid, quinic acid, and stearic acid. The main active constituent of the antimalarial drug, strychnine, was also detected in this study. The PCA and cluster analysis of chemical components resulted in distinguished plant parts into three groups, whereas had shown no difference among the sites. In addition, the crucial compounds of this species that potential for antimalarial, strychnine, are only found in the leaf and stem. It has been shown that the leaf and stem are potential plant parts for the antimalarial agent.

Objective: This study aimed to analyze the physical stability and drug content of zoledronate (ZOL) gel emulsion in virgin coconut oil (VCO) as a newpharmaceutical product at 25°C as room temperature and 40°C as an accelerated temperature for a stability physics test.Methods: The ZOL gel emulsion comprises the following ingredients: 0.16% ZOL powder, 2% carboxymethyl cellulose, 5% VCO, 0.44% sodiumbenzoate, and 0.009% antioxidant butylated hydroxytoluene, and distilled water. Samples of this gel emulsion were stored for 1 month at 25°C and40°C, and the parameters used for stability tests were pH, viscosity, spreadability, and adhesive strength. The drug content was also evaluated with aspectrophotometer. The ZOL gel emulsion was evaluated against these metrics on days 1, 7, 14, and 28.Results: The results showed that ZOL pH, viscosity, spreadability, adhesive strength, and drug content gel emulsion were clinically stable over 28 daysof storage at 25°C, whereas it was not stable when stored at 40°C for the same duration. pH value of ZOL gel emulsion significantly decreased at 28 days(p<0.05). Also for viscosity, adhesive strength, and drug content of ZOL gel emulsion showed statistically significant (p<0.05), except for spreadabilityvalue (p>0.05). The spreadability value between ZOL gel emulsion that stored at 25°C and at 40°C showed no significant result at 7 and 14 days (p>0.05).Conclusion: ZOL gel emulsion was stable at 25°C when stored for 28 days, suggesting that this is a suitable storage temperature at which its physicalstability and drug content can be maintained.

Abstract. Prihantini AI, Krisnawati, Setyayudi A. 2019. Antioxidant and alpha-glucosidase inhibitory activities of Euchresta horsfieldii. Biofarmasi J Nat Prod Biochem 17: 61-64. Euchresta horsfieldii, known as pranajiwa, is a medicinal plant that is widely grown in Bali and West Nusa Tenggara, Indonesia. Its seeds or fruits are commonly used for body freshness and stamina. The present study aimed to investigate the biological activities of leaves, root, stem, fruits, seeds of the E. horsfieldii. Antioxidant, alpha-glucosidase inhibitory activities and total phenolic compound were evaluated from methanolic extracts of all parts of E. horsfieldii. The result showed that leaf extract of E. horsfieldii exhibited the highest antioxidant activity with IC50 215.11±08.06 µg/mL. Meanwhile, the root extract had the highest alpha-glucosidase inhibitory activity and total phenolic compound with IC50 29.76±13.17 µg/mL and 763±0.01 mg GAE/100mg dry extract, respectively. In conclusion, the study suggested that E. horsfieldii is potential as natural source of antioxidant and alpha-glucosidase inhibitor agents.

Involving the community is one of the initiatives to promote the national achievement of emission reduction targets. Social forestry with agroforestry systems can establish in the forestry sector to help reduce carbon emissions. In the Forest Area with Special Purpose (KHDTK) Rarung in Central Lombok, carbon storage calculations have been performed for various agroforestry patterns created in partnership. The carbon storage analysis was carried out in four agroforestry patterns: coffee, vanilla, bamboo, and annual crops. The carbon stock of each agroforestry pattern was measured three times on a 20 x 20 m2 plot. The three carbon pools examined were soil, vegetation, litter, and understory carbon. The results showed that a partnership agroforestry pattern is a form of carbon farming that can be widely developed. The bamboo agroforestry pattern has enormous potential for carbon storage.