Espectroscopia de infravermelho próximo e metodologia de mínimos quadrados parciais para análise de soja (Glycine Max.(L) Merril) inativada termicamente
Soybeans are very consumed in Brazil and in the world, its main use is as a source of raw material in animal feed, due to the high content of protein and energy. Raw soybean presents antinutritional factors, that can cause digestive diseases, besides interfering in the absorption and nutritional in...
| Autor principal: | Marchese, Natalia Regina |
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| Formato: | Dissertação |
| Idioma: | Português |
| Publicado em: |
Universidade Tecnológica Federal do Paraná
2017
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| Assuntos: | |
| Acesso em linha: |
http://repositorio.utfpr.edu.br/jspui/handle/1/2246 |
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| Resumo: |
Soybeans are very consumed in Brazil and in the world, its main use is as a source of raw material in animal feed, due to the high content of protein and energy. Raw soybean presents antinutritional factors, that can cause digestive diseases, besides interfering in the absorption and nutritional in animals. Therefore, the soybean needs to be thermally inactivated to reduce these antinutritional factors. The objective of this research was to evaluate the application of near infrared spectroscopy (NIR) in the analysis of soybean inactivated by thermal treatments of roasting and microwave. For this, different thermal treatments of toast (T1 to T9: 110 to 120 oC / 20 to 40') and microwaves (M1 to M9: 20 to 40W / 15 to 25') were applied to raw soybean grains in laboratory scale, and industrially scale, inactivated at 110 ºC, 0,85 kg.cm-² / 50'). The samples were analysed for moisture content, lipids, proteins and trypsin inhibitors, urea activity and protein solubility. Near-infrared spectroscopy (NIR) integrated the partial least square regression (PLS) calibration was developed to analyse the moisture content, lipids, proteins and protein solubility of these soybean samples. A total of 219 spectra were collected from 73 soybean samples, 37 of which were used for calibration (inactivated industrially) and the remaining 36 were used in the validation set (inactivated by toast and microwave, laboratory). In relation to the inactivation parameters of the soybean by toasting and microwave, the most satisfactory and near industrial scale results were for the T8 (30 '/ 130 ° C) toasting heat treatment and for the microwave the M5 (20 '/ 30W). The analysis of moisture, lipids, proteins and protein solubility by NIR revealed a correlation coefficient (R²) of 0.767, 0.845, 0.915 and 0.910, respectively. Although it did not show uniformity for samples subjected to extreme conditions (superheated or subprocessed), the method indicated that it can be effectively applied for evaluation of the bromatological composition and protein solubility in industrially processed samples. |
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