Magnetic resonance imaging for nondestructive analysis of wine grapes

被引:33
作者
Andaur, JE
Guesalaga, AR
Agosin, EE
Guarini, MW
Irarrázaval, P
机构
[1] Pontificia Univ Catolica Chile, Dept Elect Engn, Santiago, Chile
[2] Pontificia Univ Catolica Chile, Dept Chem & Bioproc Engn, Santiago, Chile
关键词
magnetic resonance imaging; wine grapes; ripeness; degrees Brix;
D O I
10.1021/jf034886c
中图分类号
S [农业科学];
学科分类号
09 ;
摘要
Magnetic resonance imaging (MRI) was used to study the growth and ripening of grape berries for three varieties. The results show that this technique allows the visualization of internal characteristics of berries using noninvasive procedures in order to obtain the volume and degreesBrix distribution within a cluster. Samples of Cabernet Sauvignon, Carmenere, and Chardonnay varieties collected over the 2002 season were analyzed. Calibration models were developed to correlate soluble solids (degreesBrix) against spin-lattice relaxation time t(1) and spin-spin relaxation time t(2). The correlation of degreesBrix and t(1) was R-2 = 0.75 for Cabernet Sauvignon, R-2 = 0.8 for Carmenere, and R-2 = 0.65 for Chardonnay. In the case of t(2) the correlation was significantly lower. Reconstruction techniques for the three-dimensional representation of clusters were developed, allowing an interactive visualization of the bunches. The method also provides volume measurements of single berries and their distribution within the cluster with an accuracy of 3% and R-2 = 0.98. These results show the potential of MRI in the wine industry for both monitoring and research. Not only does it provide quantitative information about the berries such as Volume and degreesBrix distributions, but it can also be used to support the sampling procedures by providing a better cluster characterization.
引用
收藏
页码:165 / 170
页数:6
相关论文
共 29 条
[1]  
[Anonymous], 2000, PRINCIPLES MAGNETIC
[2]   PROTON MAGNETIC-RESONANCE RELAXATION STUDIES IN AQUEOUS-SOLUTIONS OF ALKALI-HALIDES AND SUGARS [J].
ARULMOZHI, V ;
RAO, AS .
PHYSICS AND CHEMISTRY OF LIQUIDS, 1993, 26 (03) :201-207
[3]  
Blouin J, 2000, Maturation et Maturite des Raisins
[4]  
BOULTON RB, 1996, PRINCIPLES PRACTICES, P13
[5]   USE OF STATIC AND DYNAMIC NMR MICROSCOPY TO INVESTIGATE THE ORIGINS OF CONTRAST IN IMAGES OF BIOLOGICAL TISSUES [J].
CALLAGHAN, PT ;
CLARK, CJ ;
FORDE, LC .
BIOPHYSICAL CHEMISTRY, 1994, 50 (1-2) :225-235
[6]  
CHO SI, 1993, T ASAE, V36, P1217, DOI 10.13031/2013.28453
[7]   Application of magnetic resonance imaging to pre- and post-harvest studies of fruits and vegetables [J].
Clark, CJ ;
Hockings, PD ;
Joyce, DC ;
Mazucco, RA .
POSTHARVEST BIOLOGY AND TECHNOLOGY, 1997, 11 (01) :1-21
[8]  
Clark CJ, 1998, J SCI FOOD AGR, V78, P349, DOI [10.1002/(SICI)1097-0010(199811)78:3&lt
[9]  
349::AID-JSFA125&gt
[10]  
3.0.CO