Document Detail

Determination of maize kernel hardness: comparison of different laboratory tests to predict dry-milling performance.
MedLine Citation:
PMID:  20602514     Owner:  NLM     Status:  MEDLINE    
BACKGROUND: Numerous foods are produced from maize, and grain hardness has been described to have an impact on grain end-use value, and in particular for dry-milling performance.
RESULTS: Thirty-three samples of commercial hybrids have been analysed for test weight (TW), thousand-kernel weight (TKW), hard:soft endosperm ratio (H/S), milling time (MT) and total milling energy (TME) through the Stenvert hardness test, coarse:fine material ratio (C/F), break force (HF) and break energy (HWF) through the puncture test, floating test (FLT), kernel dimensions and sphericity (S), protein (PC), starch (SC), lipid (LC), ash (AC) content and amylose:amylopectin ratio (AS/AP).Total grit yield (TGY) has been obtained through a micromilling procedure and used to compare the efficiency of the tests to predict the dry-milling performance. TW, H/S, MT, TME, C/F, FLT, S, PC, SC and AS/AP were significantly correlated with each other. TW has been confirmed to be a simple estimator of grain hardness. Among the hardness tests, C/F was shown to be the best descriptor of maize milling ability, followed by FLT. A good correlation with TGY has also been observed with H/S, MT, TME and PC, while SC, S and AS/AP seem to play a minor role. The puncture test (HF and HWF) did not offer good indications on the impact of hardness on kernel grinding properties.
CONCLUSION: This study can be considered as a contribution towards determining kernel properties which influence maize hardness measurement in relation to the end-use processing performance.
Massimo Blandino; Mattia Ciro Mancini; Alessandro Peila; Luca Rolle; Francesca Vanara; Amedeo Reyneri
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Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of the science of food and agriculture     Volume:  90     ISSN:  1097-0010     ISO Abbreviation:  J. Sci. Food Agric.     Publication Date:  2010 Aug 
Date Detail:
Created Date:  2010-07-12     Completed Date:  2011-01-19     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0376334     Medline TA:  J Sci Food Agric     Country:  England    
Other Details:
Languages:  eng     Pagination:  1870-8     Citation Subset:  IM    
Copyright Information:
Copyright (c) 2010 Society of Chemical Industry.
Department of Agriculture, Forestry and Land Management, University of Turin, 10095 Grugliasco (TO), Italy.
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MeSH Terms
Food Handling / methods
Food Technology*
Hardness Tests / methods*
Zea mays*

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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