Conclusions
This study showed that pomace pectin was different from pectin
obtained from MHF based on the molecular parameters.
Pomace NSP accounted for approximately 23% w/w of the gold
kiwifruit pomace (on dry weight basis). The extraction methods
(acid, water or enzyme) were observed to have some effects on
the yield, degree of branching of the pectin molecules, Mw and viscosity of pomace pectin solutions. In terms of yield, the enzymatic
method showed highest pectin recovery. On the other hand, pectin
obtained from the water extraction method had a lower yield but
was considered closest to the native native pectin present in the
pomace. All three extraction methods gave slightly different degrees of branching and sizes based RMS radii. The significance of
the degree of branching, linearity and extent of RG1 branching of
the pectin is currently not well understood. All these parameters
will ultimately affect the physical functionality of the pectin.
Further work is required to relate degree of branching to specific
functional advantages in different applications such as thickening,
stabilising, gelling properties and in the formation of novel structures
to deliver different technical functionality and sensorial
properties, etc