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Yield and quality of carrageenan from Kappaphycus alvarezii subjected to different physical and chemical treatments

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Title Yield and quality of carrageenan from Kappaphycus alvarezii subjected to different physical and chemical treatments
Not Available
 
Creator Jayasankar,Reeta
Mishra,Pathik Chandra
Seema,C
 
Subject Yield
quality
carrageenan
Kappaphycus alvarezii
physical treatment
chemical treatment
algae
 
Description Not Available
With a view to findout a suitable method for carrageenan extraction from Kappaphycus
alvarezii, a detailed investigation was made on quantitative and qualitative estimation of
carrageenan subjected to different physical and chemical treatments. The dried material
presoaked in KOH and heated for 5 hours at 900C and precipitated with propanol gave the
maximum yield of 59.4 % and viscosity of 25.25 cps. In Ca(OH)2 treatment, the yield was
almost similar to that of KOH treatment but the viscosity was very low (9.45 cps). The gel
was found to be brown in colour when treated with NaOH and milky white with Ca (OH) 2.
KOH gel was thick, translucent with high viscosity. Pretreatments of dried seaweed with
NaOH, KOH and Ca (OH) 2 followed by pressure-cooking showed relatively higher yield of
carrageenan, but the viscosity, clarity and the texture of the gel were found to be poor. Clarity
of gel obtained by KOH- methanol treatment was higher when compared to other treatments.
The yield of carrageenan was higher when the extracted material was frozen overnight and
thawed, but the gel was brown in colour with less rigidity. The present study shows that
treatment with KOH gives better yield and quality gel.
Not Available
 
Date 2021-09-08T08:20:51Z
2021-09-08T08:20:51Z
2006
 
Type Article
 
Identifier Not Available
Not Available
http://krishi.icar.gov.in/jspui/handle/123456789/61768
 
Language English
 
Relation Not Available