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Nawong Boonnak,Suchada Chantrapromma,Supinya Tewtrakul,Teeratad Sudsai 대한약학회 2014 Archives of Pharmacal Research Vol.37 No.10
The inhibitory activity of extract and compoundsisolated from the roots of Cratoxylum formosumssp. pruniflorum against nitric oxide (NO) was evaluatedusing RAW264.7 cells. Isolation of the CH2Cl2 extract ofC. formosum ssp. pruniflorum roots afforded ten knownxanthones including six tri-oxygenated xanthones (1–6)and four tetra-oxygenated xanthones (7–10), respectively. Compound 7 showed the highest inhibitory activity againstNO release with an IC50 value of 3.9 lM, followed bycompound 8 with an IC50 value of 4.3 lM, respectively. Inorder to understand the mechanism of this anti-inflammatoryactivity, the transcriptional level of 7 was found todown regulate mRNA expressions of iNOS and COX-2 indose-dependent manners, whereas 8 inhibited only iNOSmRNA expression but did not affect on that of COX-2gene. Xanthones might be the main anti-inflammatorycomponents in C. formosum ssp. pruniflorum.
Chairat, M.,Bremner, J.B.,Chantrapromma, K. The Korean Fiber Society 2007 Fibers and polymers Vol.8 No.6
The extracted dye from the dried fruit hulls of mangosteen was used as a natural dye for the dyeing of cotton and silk yam. The optimal conditions for dye extraction were to extract the dried fruit hulls of mangosteen at $80^{\circ}C$ for 1 hour with a 15 % w/v citric acid solution in a 1:4 ratio of mangosteen powder to solvent. Cotton dyeing with the extracted dye from the dried fruit hulls of mangosteen was carried out at $60^{\circ}C$ for 60 minutes with a material to liquor ratio of 1:25. The effect on dyeing of mordant type with different mordanting methods was studied. The results showed that the dyeing of cotton using the post-mordanting method with ferrous sulfate and calcium hydroxide not only provided better depth of shade but also provided better wash fastness and light fastness than with other mordants (alum; zinc tetrafluoroborate) or without a mordant. Good fastness properties were also obtained using a post-mordanted silk with calcium hydroxide.