The hydrolysis percentage of four chestnut starches subjected to
three drying treatments is shown in Fig. 3. The hydrolysis percentage
of all starches increased with hydrolysis time. After 20 min,
the FD starch showed the highest hydrolysis percentage, and all
starches showed hydrolysis percentage of less than 18.3%. After 3 h,
the FD starch displayed the highest hydrolysis percentage
(63.2e73.1%), and the ED starch had the lowest value (53.4e59.5%).
Starches subjected to freeze- and oven-drying treatments were
hydrolyzed more greatly compared with ED starch. Apart from
Yanlong starch, OD and ED starches presented similar digestion
patterns. Oven- and ethanol-drying were shown not to significantly
affect the digestion properties of starches, but freeze drying led to a
significant increase in the digestion rate of potato starch (Zhang
et al., 2014). In the present study, freeze drying disrupted the
crystalline structure of chestnut starches and oven drying led to the
pores and cracks on the surface of granules, which were assumed to
increase the hydrolysis percentage of FD and OD starches.
The hydrolysis percentage of four chestnut starches subjected tothree drying treatments is shown in Fig. 3. The hydrolysis percentageof all starches increased with hydrolysis time. After 20 min,the FD starch showed the highest hydrolysis percentage, and allstarches showed hydrolysis percentage of less than 18.3%. After 3 h,the FD starch displayed the highest hydrolysis percentage(63.2e73.1%), and the ED starch had the lowest value (53.4e59.5%).Starches subjected to freeze- and oven-drying treatments werehydrolyzed more greatly compared with ED starch. Apart fromYanlong starch, OD and ED starches presented similar digestionpatterns. Oven- and ethanol-drying were shown not to significantlyaffect the digestion properties of starches, but freeze drying led to asignificant increase in the digestion rate of potato starch (Zhanget al., 2014). In the present study, freeze drying disrupted thecrystalline structure of chestnut starches and oven drying led to thepores and cracks on the surface of granules, which were assumed toincrease the hydrolysis percentage of FD and OD starches.
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