Production of Green Banana Powder Using Foam-Mat Drying Method: Effects of Ovalbumin Concentration on Drying Kinetics and Physicochemical Properties of the Product

Authors

Abstract:

Background and Objectives: Drying, one of the traditional food preservation technique, is a complex process defined as a simultaneous heat and mass transfer steps under transient conditions, which leads to significant changes in physicochemical properties of the foodstuffs. The objective of the present study was to assess effects of ovalbumin concentration (as a foaming agent) at three levels of 1, 2 and 3% on green banana drying kinetics and qualitative and quantitative properties of the produced powder using foam-mat drying method. Materials and Methods: Ovalbumin, as a foaming agent, and 0.5% (w/w) methyl cellulose, as a stabilizer, were used for the preparation of foams. In this study, effects of ovalbumin concentration (1, 2 and 3% w/w) at 70 °C with foams of 3-mm thickness were assessed on drying kinetics of immature banana pulp and physicochemical properties of the produced powder like bulk density, glass transition temperature and water solubility index. Statistical analysis was carried out using  completely randomized design with three replications. Means were compared using Duncan’s multiple range test at 5% levels. Results: Results showed that increases in ovalbumin concentration caused significant increases in effective moisture diffusion coefficient, decreased the foam density and increased the porosity, expansion and stability of the foam. Bulk density and water absorption index decreased with increasing concentration of the foaming agent. Moreover, Carr index and Hausner ratio respectively increased and decreased by increasing ovalbumin concentration from 1 to 2 and 2 to 3%. The lowest glass transition temperature was achieved at 2% ovalbumin concentrations. Conclusion: Study of physicochemical properties of the final product showed that the powder produced at 1% ovalbumin concentrations included the highest flowability. Unripe banana pulp powder rich in resistant starch produced by foam-mat drying can be used as a natural product enriched with egg white protein and fiber source, mainly in production of functional products.

Upgrade to premium to download articles

Sign up to access the full text

Already have an account?login

similar resources

Study of Drying Method Types on the Physicochemical Characteristics of Purple-Fleshed Sweet Potato Extract Powder

The purpose of this study was to obtain the best anthocyanin pigment extract powder from 3 types of drying process, vacuum drying, spray drying, and  freeze-drying. The duration and temperature for each type of drying process are 15 h with temperature of 40 oC, 2 h with temperature of 120 oC (inlet) and 60 oC (outlet), 24 h with temperature of -50 o</su...

full text

the effects of planning on accuracy and complexity of iranian efl students’ written narrative task performance

this study compared the different effects of form-focused guided planning vs. meaning-focused guided planning on iranian pre-intermediate students’ task performance. the study lasted for three weeks and concentrated on eight english structures. forty five pre-intermediate iranian students were randomly assigned to three groups of guided planning focus-on-form group (gpfg), guided planning focus...

15 صفحه اول

study the effects of low level laser diode on no production and healing of diabetic and cortisone acetate and normal wounded sd rats

nitric oxide (no) is a small molecule synthesized by most of mammalian cells with diverse biological activities including vasodilatation, host defense and wound healing. impaired wound healing is a common occurrence among diabetics and patients receiving glucocorticoid therapy. on the other hand the application of laser in biomedical area have been increased. thus, the current studies were desi...

15 صفحه اول

the effects of time planning and task complexity on accuracy of narrative task performance

هدف اصلی این تحقیق بررسی تاثیر برنامه ریزی زمانی، هم چنین افزایش میزان پیچیدگی تکالیف در نظر گرفته شده بصورت همزمان، بر دقت و صحت و پیچیدگی عملکرد نوشتاری زبان آموزان می باشد. بدین منظور، 50 نفر از دانش آموزان دختر در رده ی سنی 16 الی 18 سال به عنوان شرکت کنندگان در این زمینه ی تحقیق در نظر گرفته شدند و به دو گروه آزمایشی و کنترل بصورت اتفاقی تقسیم شدند. اعضای گروه آزمایشی هر دو تکلیف ساده و پی...

on the relationship between using discourse markers and the quality of expository and argumentative academic writing of iranian english majors

the aim of the present study was to investigate the frequency and the type of discourse markers used in the argumentative and expository writings of iranian efl learners and the differences between these text features in the two essay genres. the study also aimed at examining the influence of the use of discourse markers on the participants’ writing quality. to this end the discourse markers us...

15 صفحه اول

Characteristics of selected functional properties of apple powders obtained by the foam-mat drying method

Foam-mat drying is an alternative method which enables the removal of water from high-sugar content juices and purees that are difficult to dry. The aim of this study was to investigate the effect of different foam-mat drying methods on some physical properties and aroma of apple puree powder. Apple puree was foamed with the addition of foaming agents. Foamed puree was dried as a layer using di...

full text

My Resources

Save resource for easier access later

Save to my library Already added to my library

{@ msg_add @}


Journal title

volume 15  issue 2

pages  101- 112

publication date 2020-06

By following a journal you will be notified via email when a new issue of this journal is published.

Keywords

No Keywords

Hosted on Doprax cloud platform doprax.com

copyright © 2015-2023