SEAFDEC/AQDINSTITUTIONAL REPOSITORY
    • English
    • 日本語
    • ไทย
    • Bahasa Indonesia
  • English 
    • English
    • 日本語
    • ไทย
    • Bahasa Indonesia
  • Login
View Item 
  •   SEAFDEC/AQD Institutional Repository Home
  • 03 SEAFDEC/AQD External Publications
  • Journal Articles, Conference Papers and Book Chapters by SEAFDEC Staff
  • Journal Articles
  • View Item
  •   SEAFDEC/AQD Institutional Repository Home
  • 03 SEAFDEC/AQD External Publications
  • Journal Articles, Conference Papers and Book Chapters by SEAFDEC Staff
  • Journal Articles
  • View Item
JavaScript is disabled for your browser. Some features of this site may not work without it.

Solar irradiation as an alternative bleaching process for agar extracted from Gracilariopsis heteroclada in Iloilo, Philippines

  • Global styles
  • MLA
  • Vancouver
  • Elsevier - Harvard
  • APA
  • Help
Thumbnail
View/Open
Request this article
Date
2019-07-30
Author
Endoma, Leonilo F.
Nacional, Loda M.
Luhan, Maria Rovilla J.
Page views
1,395
ASFA keyword
agar ASFA
Taxonomic term
Gracilariopsis heteroclada GBIF
Metadata
Show full item record

Cited times in Scopus


Share 
 
Abstract
The current industrial practice of using chemical bleach to achieve the pure white colour of agar is deleterious to both human and environmental health. This study evaluates the potential of solar irradiation as an alternative bleaching process for agar extracted from Gracilariopsis heteroclada in Iloilo, Philippines. The physico-chemical properties of agar obtained from alkaline-treated seaweed after exposure to different bleaching conditions (e.g. solar irradiation, hypochlorite solution, and ultraviolet and fluorescent lights) were examined and compared with commercial bacteriological agar. Photobleaching through solar irradiation produced agar with superior gel strength (1038.61 g cm−2), high 3,6-anhydrogalactose content (41.44%) and low total inorganic sulphate content (1.87%) without compromising agar yield (19.37%). Solar irradiation offers very promising results as a simple, low-cost, environmentally friendly alternative to the chlorine bleaching process for agar extraction.
URI
http://hdl.handle.net/10862/3477
Suggested Citation
Endoma, L. F., Nacional, L. M., & Luhan, M. R. J. (2019). Solar irradiation as an alternative bleaching process for agar extracted from Gracilariopsis heteroclada in Iloilo, Philippines. Botanica Marina, 62(6), 605-613. https://doi.org/10.1515/bot-2018-0120 
DOI
10.1515/bot-2018-0120
Type
Article
ISSN
0006-8055; 1437-4323
Collections
  • Journal Articles [1249]

Related items

Showing items related by title, author, creator and subject.

  • Thumbnail

    Fishwater and agar as binders in a prawn diet 

    Pascual, F. P.; Tabbu, N. (Aquaculture Department, Southeast Asian Fisheries Development Center, 1979)
    The objectives of the study were to find out the proportion of water to fish fins, skin and bones that would give a good gel and to determine the effect of a combination of fish water and commercial crude agar on the water ...
  • Thumbnail

    Seaweed: Gracilaria 

    Hurtado-Ponce, Anicia Q. (Aquaculture Department, Southeast Asian Fisheries Development Center, 1994)
    This paper reviews the studies on Gracilaria/Gracilariopsis conducted from 1988 to 1991 by the Aquaculture Department, Southeast Asian Fisheries Development Center. It includes 114 species of macrobenthic algae collected ...
  • Thumbnail

    Proceedings of the National Seaweed Planning Workshop held on August 2-3, 2001, SEAFDEC Aquaculture Department, Tigbauan, Iloilo 

    Hurtado, A. Q.; Guanzon Jr., N. G.; de Castro-Mallare, T. R.; Luhan, Ma. R. J. (Aquaculture Department, Southeast Asian Fisheries Development Center, 2002)
    Seaweed forming is one of the major livelihoods among coastal communities in the Philippines, particularly to some 180,000 families in the Sulu Archipelago. In 1999, the Philippines exported more than 35,000 tons of dried ...

© SEAFDEC/AQD  2025
Send Feedback | Subscribe
 

 

Browse

All of SAIRCommunities & CollectionsBy Issue DateAuthorsTitlesSubjectsThis CollectionBy Issue DateAuthorsTitlesSubjects

My Account

LoginRegister

Statistics

View Usage Statistics

© SEAFDEC/AQD  2025
Send Feedback | Subscribe
 

 

Export citations

Export the current results of the search query as a citation list. Select one of the available citation styles, or add a new one using the "Citations format" option present in the "My account" section.

The list of citations that can be exported is limited to items.

Export citations

Export the current item as a citation. Select one of the available citation styles, or add a new one using the "Citations format" option present in the "My account" section.

Export Citations

DOCUMENT REQUEST NOT AVAILABLE

This publication is still available (in PRINT) and for sale at AQD bookstore. The library is currently restricted to send PDF of publications that are still for sale.

You may contact bookstore@seafdec.org.ph or visit AQD bookstore for orders.

FILE UNDER EMBARGO

This file associated with this publication is currently under embargo. This will be available for download after the embargo date.