Authors: Dora Luz ArvizuHiguera Y Elizabeth RodríguezMontesinos J Iván MurilloÁlvarez Mauricio MuñozOchoa Gustavo HernándezCarmona
Publish Date: 2007/11/09
Volume: 20, Issue: 5, Pages: 515-519
Abstract
The effects of alkali treatment time and extraction time of native agar and alkali treated agar obtained from Gracilaria vermiculophylla were studied The response characteristics were mainly agar yield and gel strength Alkali treatment was carried out at 05 10 15 20 25 and 30 h Agar yield and gel strength decreased with the increase in the time of the alkali treatment The highest yield 153 and highest gel strength 1064 g cm−2 were obtained at 05 h and therefore this time was used for the next experiment The extraction of both native and alkali treated agars was carried out at 15 20 25 and 30 h The best extraction time for alkali treated agar was 15 h and for native agar 25 h The alkali treated agar obtained with the different alkali treatment and extraction times showed higher melting 924–997°C and gelling 357–396°C temperatures Native agar was lower in melting 602–641°C and gelling 204–234°C temperatures The 36anhydrogalactose content decreased with increasing alkali treatment time with the opposite effect during the extraction of native and alkali treated agarsWe thank the Instituto Politécnico Nacional CICIMARIPN for the financial support the “Comisión para el Fomento de Actividades Académicas COFAAIPN” and the program “Estímulo al Desempeño de la Investigación EDIIPN” for the incentives granted Thanks to Dr Ellis Glazier for editing the English language text
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