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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Measuring thermal properties of oilseeds using time domain nuclear magnetic resonance spectroscopy

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Author(s):
Carosio, Maria G. A. [1] ; Bernardes, Diego F. [2] ; Andrade, Fabiana D. [3] ; Moraes, Tiago B. [3] ; Tosin, Giancarlo [2] ; Colnago, Luiz A. [4]
Total Authors: 6
Affiliation:
[1] Univ Sao Paulo, Inst Quim Sao Carlos, Sao Carlos, SP - Brazil
[2] Fine Instrument Technol, Sao Carlos, SP - Brazil
[3] Univ Sao Paulo, Inst Fis Sao Carlos, Sao Carlos, SP - Brazil
[4] EMBRAPA Instrumentacao, Sao Carlos, SP - Brazil
Total Affiliations: 4
Document type: Journal article
Source: Journal of Food Engineering; v. 173, p. 143-149, MAR 2016.
Web of Science Citations: 5
Abstract

A time domain nuclear magnetic resonance (TD-NMR) method to measure temperature and thermal diffusivity of intact oilseeds is demonstrated. The method to measure temperature of intact seeds is based in a calibration curve between the transverse relaxation time (T-2) of vegetable oil in the seed, with temperature. The thermal diffusivity (lambda) was calculating using the time constant of temperature decay, when the spherical sample was placed in a low temperature bath and its radius. The proof of principle was demonstrated with spherical samples of glycerol and ethylene glycol with known lambda. Thermal diffusivity of the macadamia nuts calculated by this method were approximately 0.9 x 10(-7) m(2) s(-1), similar to these values measured by thermocouple method (0.6 x 10(-7) m(2) s(-1)), Dickerson method (0.8 x 10(-7) m(2) s(-1)) and the lambda reported in literature for nuts and oilseeds. (C) 2015 Elsevier Ltd. All rights reserved. (AU)

FAPESP's process: 11/14099-3 - Use of Time Domain - NMR for the characterization of high viscosity organic systems
Grantee:Fabiana Diuk de Andrade
Support Opportunities: Scholarships in Brazil - Post-Doctorate
FAPESP's process: 12/20247-8 - Development and validation of time domain NMR spectrometers and methods for non-destructive analysis of food
Grantee:Luiz Alberto Colnago
Support Opportunities: Regular Research Grants
FAPESP's process: 09/09734-1 - Methodology to measure temperature in intact seeds in soils by NMR
Grantee:Maria Gabriela Aparecida Carosio
Support Opportunities: Scholarships in Brazil - Doctorate (Direct)