Bio Economy Contribution of phenolics to the antioxidant potential of propolis from Tetragonula laeviceps and Tetragonula pegdeni and its correlation to the dominant plant sources in different regions in Thailand ✎ Chanpen Chanchao First report of piperidone extracts as tyrosinase and α-glucosidase inhibitors from fruits of Piper retrofractum ✎ Chanpen Chanchao In vitro cytotoxic activity on KATO-III cancer cell lines of mangiferolic acid purified from Thai Tetragonula laeviceps propolis ✎ Chanpen Chanchao Anti-Malassezia globosa (MYA-4889, ATCC) activity of Thai propolis from the stingless bee Geniotrigona thoracica ✎ Chanpen Chanchao Tyrosinase inhibitors from fruits of Piper sarmentosum: Isolation, characterization and structure-activity relationship study ✎ Chanpen Chanchao Anti-tyrosinase and anti-melanogenic effects of piperine isolated from Piper nigrum on B16F10 mouse melanoma cells ✎ Chanpen Chanchao