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dc.contributor.authorLuhan, Maria Rovilla J.
dc.contributor.authorFerrer, Maria Salvacion R.
dc.contributor.authorTanaka, Jiro
dc.contributor.authorAruga, Yusho
dc.date.accessioned2014-05-09T03:45:05Z
dc.date.available2014-05-09T03:45:05Z
dc.date.issued2004
dc.identifier.citationLuhan, M. R. J., Ferrer, M. S. R., Tanaka, J., & Aruga, Y. (2004). Monthly variation of agar quality of some gracilarioids from the Philippines (Rhodophyta, Gracilariaceae). The Philippine Scientist, 41, 22-35.en
dc.identifier.issn0079-1466
dc.identifier.urihttp://hdl.handle.net/10862/2015
dc.description.abstractSpecies of the economically important gracilarioid seaweeds from the Philippines were studied to determine the monthly variation in agar quality. Yield, gel strength, melting and gelling temperatures, and sulfate contents were compared. Lowest agar yield was observed in Gracilaria changii in July (4.15%) and highest in Gracilariopsis heteroclada in March (20.84%). Gel strength was lowest in G. heteroclada in November (44 g cm-2) and highest in Gracilaria tenuistipitata in January (874 g cm-2). Melting temperature was lowest in G. heteroclada in November (68.7°C) and highest also in G. heteroclada in January (90.3°C). Gelling temperature was lowest at 34.4°C in G. changii and Gracilaria firma in November and December, respectively; and highest in G. heteroclada in October (45°C). Sulfate content was lowest in G. firma in November (0.16%) and highest in G. heteroclada in February (2.71%). The variation in the agar parameters could be due to different composition of agars of different species. Sulfate is significantly lower in Gracilaria firma. Yield is significantly higher in Gracilariopsis heteroclada. There is no significant difference in the gel strength, melting and gelling temperatures among species.en
dc.language.isoenen
dc.publisherSan Carlos Publications, University of San Carlosen
dc.subjectGracilaria changii
dc.subjectGracilaria firma
dc.subjectGracilaria tenuistipitata
dc.subjectGracilariopsis heteroclada
dc.subjectPhilippinesen
dc.subjectGracilariaceae
dc.subjectPhycocolloidsen
dc.titleMonthly variation of agar quality of some gracilarioids from the Philippines (Rhodophyta, Gracilariaceae)en
dc.typeArticleen
dc.citation.volume41
dc.citation.spage22
dc.citation.epage35
dc.citation.journalTitleThe Philippine Scientisten
seafdecaqd.library.callnumberVF SJ 0781
seafdecaqd.databank.controlnumber2004-56
dc.subject.asfaAgaren
dc.subject.asfaChemical compositionen
dc.subject.asfaSeaweedsen
dc.subject.asfaTemperature effectsen
dc.subject.asfaAlgaeen
dc.subject.asfaSeasonalityen


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