排序方式: 共有3条查询结果,搜索用时 15 毫秒
1
1.
A rhodamine‐triazole fluorescent chemodosimeter for Cu2+ detection and its application in bioimaging 下载免费PDF全文
Kanokorn Wechakorn Samran Prabpai Kanoknetr Suksen Phongthon Kanjanasirirat Yongyut Pewkliang Suparerk Borwornpinyo Palangpon Kongsaeree 《Luminescence》2018,33(1):64-70
A rhodamine‐based fluorescent chemodosimeter rhodamine hydrazide‐triazole (RHT) tethered with a triazole moiety was developed for Cu2+ detection. In aqueous medium, the RHT probe exhibited high selectivity and sensitivity toward Cu2+ among other metal ions. The addition of Cu2+ triggered a fluorescence emission of RHT by 384‐fold (Φ = 0.33) based on a ring‐opening process and a subsequent hydrolysis reaction. Moreover, RHT also showed a selective colorimetric response toward Cu2+ from colorless solution to pink, readily observed with the naked eye. The limit of detection of RHT for Cu2+ was calculated to be 1 nM (0.06 ppb). RHT was successfully demonstrated to detect Cu2+ in Chang liver cells by confocal fluorescence microscopy. 相似文献
2.
Panomwan Panseeta Samran Prabpai Apichart Suksamrarn Sunit Suksamrarn 《Phytochemistry》2011,72(9):909-915
Investigation of the MeOH extract obtained from the root of the Ziziphus mauritiana grown in Thailand resulted in the isolation of two 14- and 13-membered cyclic alkaloids, mauritine L (1) and mauritine M (2), and three known cyclopeptide alkaloids, nummularines H (3), B (4) and hemsine A (5). Their structures were elucidated on the basis of extensive NMR spectroscopic analysis. The first single crystal X-ray diffraction study of the 13-membered ring cyclopeptide, nummularine B methiodide (4′), revealed all S configurations on the amino acid residues. The isolated alkaloids exhibited potent antiplasmodial activity against the parasite Plasmodium falciparum with the inhibitory concentration (IC50) ranging from 3.7 to 10.3 μM. Compounds 2 and 3 also demonstrated antimycobacterial activity against Mycobacterium tuberculosis with the MIC of 72.8 and 4.5 μM, respectively. 相似文献
3.
Chakapong Intaraudom Nattawut Boonyuen Sumalee Supothina Punsa Tobwor Samran Prabpai Palangpon Kongsaeree Pattama Pittayakhajonwut 《Phytochemistry letters》2013,6(3):345-349
A novel spiro-sesquiterpene, anthracophyllic acid (1), and a new aristolane sesquiterpene, anthracophyllone (2), were isolated from the mushroom Anthracophyllum sp. BCC18695, together with seven known compounds including aurisins A (3), G (4), K (5), nambinones A, C, axinysones A, and B. The relative configuration of 1 and the hitherto unknown absolute stereochemistry of 3 were determined based on X-ray spectroscopic data. Biological activities including antimalarial activity against Plasmodium falciparum K1 strain, antibacterial property against Bacillus cereus, and cytotoxicity against MCF-7, KB, NCI-H187, and Vero cells of the isolated compounds were also evaluated 相似文献
1