| Full text | |
| 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-Doctoral |
| 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) |