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

Effects of gel depth and gel surface area on agar gel strength

Thumbnail
View/Open
Request this document
Date
1993
Author
de Castro, Teresa R.
Page views
50
Share 
 
Metadata
Show full item record

Abstract
Agar is a high priced phycocolloid extracted from red seaweeds (Rhodophyta) called agarophytes. It is a mixture of polysaccharides whose basic monomer is galactose (Armisen and Galatas 1987). Agar has many uses in the food and pharmaceutical industry, and the measure of its commercial value is based on its physical properties. One of the most important physical properties of commercial agar products is its gel strength (Chandrkrachang and Chinadit 1988). Gel strength is the force required to rupture the gel and it is measured through the use of gel testers available in the market, such as the Nikkan-sui, Rowerbal, and the Marine Colloids gel testers. Each instrument has built-in specifications for optimum use and results. Standard procedures used in the preparation of 1.5% agar gels for gel strength determination usually require 1.5 g of sample. Replication of samples in laboratory testing is however standard requirement and replication is constrained when sample extracts are scarce.

This paper discusses the effects on gel strength of different gel depths and gel surface areas. It aims to identify the minimum size of vessel and depth of gel that will give optimum results using a Marine Colloids Model GT-2 gel tester.
URI
http://hdl.handle.net/10862/1411
Suggested Citation
de Castro, T. R. (1993). Effects of gel depth and gel surface area on agar gel strength. The Philippine Scientist, 30, 100-103.
Subject
Agar; Colloids; Gels; Seaweed products; Rhodophyta
Collections
  • AQD [1108]

Related items

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

  • Thumbnail

    Agar yield and gel strength of Gracilaria heteroclada collected from Iloilo, Central Philippines 

    Luhan, Maria Rovilla J. (Walter de Gruyter, 1992)
    Seasonality of yield and gel strength of agar from Gracilaria heteroclada was determined. Gel strength was high (510-794 gm cm<sup>-2</sup>) during early dry season (October-March) and low (43-101 gm cm<sup>-2</sup>) during ...
  • Thumbnail

    Effect of stocking density and nutrients on the growth and agar gel of Gracilariopsis bailinae (Gracilariales, Rhodophyta) 

    Chavoso, E. A. J.; Hurtado-Ponce, Anicia Q. (San Carlos Publications, University of San Carlos, 1995)
    The effect of additional nutrients and varying stocking densities (500, 1000, and 2000 g m<sup>-2</sup>) on the growth and physical properties of Gracilariopsis bailinae was determined. Growth was significantly higher (L ...
  • Thumbnail

    Analysis of nitrite in aqueous solutions containing concentrated matrix ions using an octadecyl-poly(vinyl alcohol) gel microbore column and an electrochemical detector 

    Rokushika, Souji; Kihara, Kazuko; Yamamoto, Fumiko M.; Subosa, Precilla F. (Dr. Alfred Huethig Publishers, 1991)
    The importance of the analysis of low level nitrite concentrations in aqueous samples is increasing in various fields such as environmental, food, and aquaculture chemistry. Recent progress in ion chromatography paved the ...

© SEAFDEC 2021
Contact Us | Send Feedback
 

 

Browse

All of SIRCommunities & CollectionsBy Issue DateAuthorsTitlesSubjectsThis CollectionBy Issue DateAuthorsTitlesSubjects

My Account

Login

Statistics

View Usage Statistics
Related Links
SEAFDEC/TD IRSEAFDEC/AQD IRSEAFDEC/MFRDMD IRSEAFDEC/IFRDMD IR

© SEAFDEC 2021
Contact Us | Send Feedback