學生姓名:
馬晨瀚
指導教授:
江孟燦
學期:
107下
摘 要:
Three different hydrolysates were obtained from the red seaweed Mastocarpus stellatus using Alcalase:
(H0) hydrolysis at 50 C for 3 h; (H1) hydrolysis at 50 C for 3 h followed by heating at 90 C for 1 h; and
(H2) hydrolysis at 50 C for 3 h followed by heating at 90 C for 2 h. The hydrolysates newly obtained
were supplemented with glycerol and directly used as film-forming solutions for development of the
corresponding films (FH0, FH1 and FH2). Viscoelastic properties of the film-forming solutions showed
improved gel-like behaviour when the k/i-hybrid carrageenan extraction at 90 C was promoted. FTIR
analysis revealed that FH2 had the highest relative proportion of k-carrageenan. All the films showed a
high ultraviolet barrier property, but opacity increased markedly with prolonged heat treatment. Very
slight differences in water solubility and water vapour permeability were found among the three types of
film, but FH0 had the highest tensile strength and Young's modulus responses, whereas film elongation
tended to increase with progressive carrageenan extraction in FH1 and FH2. No significant differences in
puncture response were found. The enzymatic hydrolysis at 50 C provided films with reducing power
and radical scavenging capacity, which did not change as a result of subsequent heat treatment at 90 C.
The FolineCiocalteu-reactive substances content increased with both the hydrolysis process and the
subsequent heating treatment.
2016-Simple_and_efficient_hydrolysis_procedure_for_full_utilizat ion_of_the_seaweed_Mastocarpus_stellatus_to_produce_antioxidant_ films.pdf