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Characterisation of macadamia nuts using X-ray microtomography
Plougonven, Erwan; Srichamnong, Warangkana; Srzednicki, George et al.
2012In Micro-CT User Meeting Abstract Book
 

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Keywords :
Macadamia nuts; Micro-tomography; Segmentation
Abstract :
[en] Macadamia nuts are among the most nutritious and highest in monounsaturated oil content among edible nuts1. They are widely grown in Australia (46 % of total production), United States of America, especially in Hawaii, South Africa and Guatemala2. In practice, there are several steps involved in macadamia processing, including sorting and grading, drying, cracking, roasting, packaging and storage. Drying is a very crucial step as it needs to preserve macadamia quality as well as enhance storage stability through the reduction of water activity. It is obvious that physical properties of the nut contribute to its drying characteristics, and hence its storage stability. Accurate measures such as kernel volume ratio or shell density could help for improving drying efficiency. We present a methodology to investigate structural differences between varieties of macadamia nuts in order to understand the factors involved in storage stability. Fresh nuts-in-shell are scanned by X-ray microtomography, and the different parts of the nuts (shell, kernel, tracheids) are segmented by a set of classical 3D image operators. After image segmentation, volumes are determined, and additional weighing of the nuts allows density measurements. These quantities are plotted for several nuts from each variety.
Research center :
Faculty of Applied Sciences, Laboratory of Chemical Engineering, ULG
Disciplines :
Materials science & engineering
Author, co-author :
Plougonven, Erwan  ;  Université de Liège - ULiège > Département de chimie appliquée > Génie chimique - Procédés et développement durable
Srichamnong, Warangkana
Srzednicki, George
Léonard, Angélique  ;  Université de Liège - ULiège > Département de chimie appliquée > Génie chimique - Procédés et développement durable
Language :
English
Title :
Characterisation of macadamia nuts using X-ray microtomography
Publication date :
05 April 2012
Event name :
Micro-CT User Meeting 2012
Event organizer :
Jeroen Hostens
Event place :
La Hulpe, Belgium
Event date :
from 02-04-2012 to 05-04-2012
Audience :
International
Main work title :
Micro-CT User Meeting Abstract Book
ISBN/EAN :
9789081678100
Pages :
58-62
Available on ORBi :
since 03 May 2012

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