2 research outputs found
Effect of drying technologies on bioactive compounds maintenance in pumpkin by-products
ArticleDuring the pumpkin processing large amounts of waste material as a combination of
pumpkin peel, seeds and the flesh between seeds has produced. Therefore it is important to
investigate the possibilities for using the pumpkin residues.
The aim
of this resea
rch was to
investigate the effect of different drying technologies on maintenance of bioactive compounds in
pumpkin by
-
products.
Two pumpkin residue products of Hubard group pumpkins were used to
obtain pumpkin powder: residue products formed in the proces
s of extracting industrial pumpkin
purée by heating it in a heat exchanger and treating through a sieve of pulpier; residues resulting
from pumpkin juice extraction process mechanically pressed from fresh, chopped pumpkins. In
order to be able to choose th
e most suitable drying technology pumpkin by
-
products were dried
in the microwave
-
vacuum, convective (at 40, 50, 70 and 80
°C
) and freeze
-
drying type dryers.
For all samples total carotenes, the ascorbic acid, total phenols content (TPC) and antiradical
ac
tivity (DPPH ̇, ABTS
̇+
) were determined by using standard methods. The highest total
carotenes content was retained in freeze
-
dried pumpkin powders. The most suitable drying
method for obtaining pumpkin powder with the highest ascorbic acid, total phenolic
content and
antiradical activity is drying in convective type drying at 80
°C
temperature