TY - JOUR
T1 - Monomer composition and sequence of sodium alginate extracted at pilot plant scale from three commercially important seaweeds from Mexico
AU - Murillo-Álvarez, Jesús Iván
AU - Hernández-Carmona, Gustavo
N1 - Funding Information:
Acknowledgments This work was supported by grants from SIP, COFAA and EDI (Instituto Politécnico Nacional, México). The authors thank Liz Rodríguez, Dora Arvizu, Ricardo Yabur, Mau Muñoz and Jorge Castro for assistance during the collection of the algal material and the extraction procedure. Dr. Rosalba Encarnación-Dimayuga is acknowledged for allowing us to use the FTIR spectrometer.
PY - 2007/10
Y1 - 2007/10
N2 - The marine waters of the Baja California peninsula (Mexico) are a rich source of brown seaweeds with a great potential for exploitation. For that reason, Sargassum sinicola, Eisenia arborea, and Macrocystis pyrifera collected from different locations were subjected to extraction of sodium alginate using a pilot-plant scale process developed in our facilities. The composition and sequence parameters of the recovered alginate were studied by infrared and nuclear magnetic resonance spectroscopy. The spectral analysis of the products revealed that sodium alginate from S. sinicola contains a greater proportion of guluronate monomers (64%) than that from E. arborea (48%), and M. pyrifera (38%). Computation of the frequencies of diads and triads indicated that the alginate from S. sinicola was constructed by intercalated guluronate-blocks of 14 residues in length. In contrast, the length of the G-block in the alginates from E. arborea and M. pyrifera were 7 and 4 residues, respectively. The results show that S. sinicola, E. arborea, and M. pyrifera are sources of sodium alginate with different mannuronate/guluronate ratios, as well as a varied building-block length. In consequence, aqueous dispersions of sodium alginate from the three studied species are expected to exhibit different physical properties.
AB - The marine waters of the Baja California peninsula (Mexico) are a rich source of brown seaweeds with a great potential for exploitation. For that reason, Sargassum sinicola, Eisenia arborea, and Macrocystis pyrifera collected from different locations were subjected to extraction of sodium alginate using a pilot-plant scale process developed in our facilities. The composition and sequence parameters of the recovered alginate were studied by infrared and nuclear magnetic resonance spectroscopy. The spectral analysis of the products revealed that sodium alginate from S. sinicola contains a greater proportion of guluronate monomers (64%) than that from E. arborea (48%), and M. pyrifera (38%). Computation of the frequencies of diads and triads indicated that the alginate from S. sinicola was constructed by intercalated guluronate-blocks of 14 residues in length. In contrast, the length of the G-block in the alginates from E. arborea and M. pyrifera were 7 and 4 residues, respectively. The results show that S. sinicola, E. arborea, and M. pyrifera are sources of sodium alginate with different mannuronate/guluronate ratios, as well as a varied building-block length. In consequence, aqueous dispersions of sodium alginate from the three studied species are expected to exhibit different physical properties.
KW - Eisenia arborea
KW - Guluronic
KW - Macrocystis pyrifera
KW - Mannuronic
KW - Sargassum sinicola
KW - Uronates
UR - http://www.scopus.com/inward/record.url?scp=34548379986&partnerID=8YFLogxK
U2 - 10.1007/s10811-007-9168-5
DO - 10.1007/s10811-007-9168-5
M3 - Artículo
SN - 0921-8971
VL - 19
SP - 545
EP - 548
JO - Journal of Applied Phycology
JF - Journal of Applied Phycology
IS - 5
ER -