|Göteborgs universitets publikationer
Characterization of Carrageenan Extracted from Hypnea bryoides in Oman.
Författare och institution:
Ahmed Ali Al-Alawi (-); Insaaf Mohammed Al-Marhubi (-); Mohammed Said Moosa Al-Belushi (-); Bassam Soussi (Institutionen för kliniska vetenskaper, sektionen för kirurgi och kirurgisk gastroforskning, Avdelningen för kirurgi)
Marine biotechnology (New York, N.Y.), 10 ( 1007 ) s. 10126
Artikel, refereegranskad vetenskaplig
Carrageenophyte red seaweed from Oman, Hypnea bryoides, extracted using three different processes: an aqueous, a mild alkaline, and a more vigorous alkaline extraction was investigated. The resulting extract precipitated by alcohol was subject to chemical and rheological measurements. The total carbohydrate [ranged from 36.78 to 41.65 g/100 g], and ash [39.04 to 43.11 g/100 g] were the most abundant components in H. bryoides and contrary to the two, lipid content was found at a minimum [ranging from 2.95 to 3.38 g/100 g]. Alkali treatment with NaOH allowed complete conversion of kappa (κ) carrageenan form as detected by FTIR analysis. Total yield by alkali treatments gave higher yields (33%) compared with aqueous treatments (12%). However, subsequent aqueous treatment produced mixed carrageenan (μ and κ) with higher molecular weight compared with the alkali treatments which produced single carrageenan form (κ) with molecular weight of 4.1 × 10(5) Da. The effects of thermal history on gel-sol and sol-gel transition were investigated by differential scanning calorimeter (DSC) and rheology on a pure sample and 1.5% κ-carrageenan mixture added with 30 mM KCl. Transition temperatures from DSC and rheology showed comparable results and were in good agreement with those previously reported.
Ämne (baseras på Högskoleverkets indelning av forskningsämnen):
MEDICIN OCH HÄLSOVETENSKAP