NDLI: The isolation of prophyra-334 from marine algae and its UV-absorption behavior

Content Provider	Springer Nature Link
Author	Zhaohui, Zhang Xin, Gao Tashiro, Yuri Matsukawa, Shingo Ogawa, Hiroo
Copyright Year	2005
Abstract	Prophyra-334 was prepared by methanol extraction and HPLC methods from marine algae (dried laver). It is a sunscreen compound that has good absorption of ultraviolet radiations in the wavelength ranges of 200–400 nm. The absorption maximum wavelength of prophyra-334 is at 334 nm, so defined the name. The molar extinction coefficient (ε) of prophyra-334 in aqueous solution at 334 nm wavelength is 4.23×104. The absorption of prophyra-334 in organic solvents differs in aqueous solutions. In polar organic solvents, the absorption maximum wavelength of prophyra-334 has a slight shift toward longer wavelength compared with that in pure water. On the contrary, in inert non-polar organic solvents, the absorption maximum wavelength and the shape of absorption spectra of prophyra-334 are changed. The effects of organic solvents on prophyra-334 stability suggested that: (1) the absorbance of prophyra-334 in water is generally constant at temperature of 60°C in 24 h, meaning that prophyra-334 is quite stable in water; (2) the absorbance of prophyra-334 in ethanol and hexane decreases at the same condition. The stability of prophyra-334 in organic solvents is less than that in aqueous solution. In benzene, the prophyra-334 is very instable.
Starting Page	400
Ending Page	405
Page Count	6
File Format	PDF
ISSN	02544059
Journal	Chinese Journal of Oceanology and Limnology
Volume Number	23
Issue Number	4
e-ISSN	19935005
Language	English
Publisher	Science Press
Publisher Date	2005-01-01
Publisher Place	Beijing
Access Restriction	Subscribed
Subject Keyword	prophyra-334 extraction isolation marine algae organic solvent UV-absorption Oceanography
Content Type	Text
Resource Type	Article
Subject	Water Science and Technology Oceanography

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