Zagazig University Digital Repository
Home
Thesis & Publications
All Contents
Publications
Thesis
Graduation Projects
Research Area
Research Area Reports
Search by Research Area
Universities Thesis
ACADEMIC Links
ACADEMIC RESEARCH
Zagazig University Authors
Africa Research Statistics
Google Scholar
Research Gate
Researcher ID
CrossRef
Study of Instant Controlled Pressure Drop DIC Treatment in Manufacturing Snack and Expanded Granule Powder of Apple and Onion
Faculty
Agriculture
Year:
2011
Type of Publication:
Article
Pages:
331-341
Authors:
Mounir, S, Besombes, C, Al-Bitar, N, Allaf, K
DOI:
10.1080/07373937.2010.491585
Journal:
DRYING TECHNOLOGY TAYLOR \& FRANCIS INC
Volume:
29
Research Area:
Engineering
ISSN
ISI:000287495100003
Keywords :
Decontamination, Drying kinetics, Expanded granule powder, Flavonoids, Instant controlled pressure drop (DIC), Puffing, Specific surface area, Swell drying
Abstract:
While the use of opuffingo process is mainly limited to products like cereals or carrot, the instant controlled pressure drop (DIC) can treat and expand the large domain of heat sensitive food products. In the present article, this operation is applied on partially dried apple and onion, to produce snack or, by shadow grinding, expanded granule powder. DIC is a high-steam pressure treatment (up to 0.6MPa in this article), where steam is applied constantly during a short treatment time t (5-55s) and instantaneously dropping the pressure toward vacuum 5kPa with a rate higher than 0.5MPa s-1. The expanded structure allows the product to achieve better functional properties linked with a greater specific surface area. Thus, the time of final hot air drying (with air flow at 40 degrees C, 1m s-1, and 267Pa partially pressure humidity) is reduced by about 55\% through greater effective diffusivity and initial starting accessibility. The product's nutritional value is partially preserved (vitamins) or even improved through more available flavonoids. DIC can perfectly decontaminate the products, and end quality attributes are higher than normally dried or as good as freeze-dried fruits.
Online
PDF
جامعة المنصورة
جامعة الاسكندرية
جامعة القاهرة
جامعة سوهاج
جامعة الفيوم
جامعة بنها
جامعة دمياط
جامعة بورسعيد
جامعة حلوان
جامعة السويس
شراقوة
جامعة المنيا
جامعة دمنهور
جامعة المنوفية
جامعة أسوان
جامعة جنوب الوادى
جامعة قناة السويس
جامعة عين شمس
جامعة أسيوط
جامعة كفر الشيخ
جامعة السادات
جامعة طنطا
جامعة بنى سويف