TY - JOUR
T1 - Seasonal variation of agar from Gracilaria vermiculophylla, effect of alkali treatment time, and stability of its Colagar
AU - Vergara-Rodarte, Mario Antonio
AU - Hernández-Carmona, Gustavo
AU - Rodríguez-Montesinos, Y. Elizabeth
AU - Arvizu-Higuera, Dora Luz
AU - Riosmena-Rodríguez, Rafael
AU - Murillo-Álvarez, Jesús Iván
PY - 2010/12
Y1 - 2010/12
N2 - Gracilaria vermiculophylla, from Baja California Sur, Mexico, was studied in order to determine the seasonal variation of yield and quality of native and alkaline agar during 2007-2008. The highest alkaline agar yield was obtained in summer (17%) and the highest gel strength in spring (1,132 g cm-2). The highest melting temperature was 98°C (winter). The highest gelling temperature was 68°C (summer). The values obtained are within the range of the most important Gracilaria species harvested worldwide. During the agar extraction step, the best results were obtained after 30 min of alkali treatment with sodium hydroxide (7%), after which the quality decreased significantly. We produced Colagar from G. vermiculophylla which consists of the seaweeds treated with sodium hydroxide and dried. The yield and quality of the agar obtained from the Colagar shows stability in both yield and quality during 1 year of storage, suggesting that alkali treatment is a good method of avoiding agar hydrolysis during storage.
AB - Gracilaria vermiculophylla, from Baja California Sur, Mexico, was studied in order to determine the seasonal variation of yield and quality of native and alkaline agar during 2007-2008. The highest alkaline agar yield was obtained in summer (17%) and the highest gel strength in spring (1,132 g cm-2). The highest melting temperature was 98°C (winter). The highest gelling temperature was 68°C (summer). The values obtained are within the range of the most important Gracilaria species harvested worldwide. During the agar extraction step, the best results were obtained after 30 min of alkali treatment with sodium hydroxide (7%), after which the quality decreased significantly. We produced Colagar from G. vermiculophylla which consists of the seaweeds treated with sodium hydroxide and dried. The yield and quality of the agar obtained from the Colagar shows stability in both yield and quality during 1 year of storage, suggesting that alkali treatment is a good method of avoiding agar hydrolysis during storage.
KW - Agar
KW - Baja California Sur
KW - Gel strength
KW - Gracilaria
KW - Seasonal variation
KW - Storage
UR - http://www.scopus.com/inward/record.url?scp=78449239038&partnerID=8YFLogxK
U2 - 10.1007/s10811-010-9516-8
DO - 10.1007/s10811-010-9516-8
M3 - Artículo
SN - 0921-8971
VL - 22
SP - 753
EP - 759
JO - Journal of Applied Phycology
JF - Journal of Applied Phycology
IS - 6
ER -