Uruguayan rice (Oritza sativa L.) oils characterization

RODRIGUEZ, MARIA CECILIA - SUBURÚ, GABRIELA - TORRES, MARINA - OLAZÁBAL, LAURA - TORRE, ALEJANDRA

Resumen:

The rice crop is one of the most developed agricultural activities in Uruguay, having become the third item of export. Although the main product of the rice chain is the elaborated rice, in the recent years several industries have begun to produce co-products of rice: crude rice oil and refined oil, rice flour and cookies. The production of crude oil begins with ground, peeled and polished rice grain. This product can be used in animal nourishment or in oil extraction. Refinement from the crude rice oil takes the same steps than any other vegetable oil. As any other vegetable oil, rice oil is very prone to oxidation, this is due to the high percentage of polyinsaturated acids, despite the vitamin E content and its role of antioxidant. Therefore, sometimes additional stabilization is needed. The main purpose of this work is to characterize the Uruguayan Rice Oils by determining the following parameters: profile of fatty acids, alpha tocopherol, Iodine Index, Refraction Index, Saponification Index, Unsaponifiable Matter and Density at 20ºC. The Norm used as reference was the American Oil Chemistry Society. In this condition the statistical analysis performed shows that there is not a model that could explain the variability of the studied factors nor reduce the number of factors that must be taken into consideration. The Kolmogorov-Smirnov test, performed according to Lillieford correction to verify normality, showed that distribution of fluctuations that correspond to the three most abundant fatty acids studied (16:0, 18:1 and 18:2) can be considered as normal. The obtained values for the insaturated fatty acids were from15.6 to18.2 for 16:0, from 42.1 to 43.8 for 18:1 and from 34.8 to 37.4 for 18:2. These results obtained were correlated with the high values of the Iodine Index: 100.6 - 101.8. Results of vitamin E expressed as alpha tocopherol are between 7 and 35 mg/100g, but in 75% of the cases the results oscillated between 18 and 26 mg/100g. As the study of the residuals does not show evidence of lack of linear fit, we do not discard such adjust in this instance. Therefore it is possible that, introducing a substantially larger quantity of samples than the ones performed in the present preliminary study, could enable to find an appropriate and relatively simple model, which could explain the linear fit.


Detalles Bibliográficos
2006
ACEITE DE ARROZ
URUGUAY
Inglés
Laboratorio Tecnológico del Uruguay
Catálogo digital del LATU
https://catalogo.latu.org.uy/opac_css/index.php?lvl=notice_display&id=28161
Acceso abierto
CC BY-NC-ND
_version_ 1807353827787014144
author RODRIGUEZ, MARIA CECILIA
author2 SUBURÚ, GABRIELA
TORRES, MARINA
OLAZÁBAL, LAURA
TORRE, ALEJANDRA
author2_role author
author
author
author
author_facet RODRIGUEZ, MARIA CECILIA
SUBURÚ, GABRIELA
TORRES, MARINA
OLAZÁBAL, LAURA
TORRE, ALEJANDRA
author_role author
collection Catálogo digital del LATU
dc.coverage.none.fl_str_mv Presentado en: 4th Euro Fed Lipid Congress, Madrid, Octubre 2006
dc.creator.none.fl_str_mv RODRIGUEZ, MARIA CECILIA
SUBURÚ, GABRIELA
TORRES, MARINA
OLAZÁBAL, LAURA
TORRE, ALEJANDRA
dc.date.none.fl_str_mv 2006-01-01
dc.description.abstract.none.fl_txt_mv The rice crop is one of the most developed agricultural activities in Uruguay, having become the third item of export. Although the main product of the rice chain is the elaborated rice, in the recent years several industries have begun to produce co-products of rice: crude rice oil and refined oil, rice flour and cookies. The production of crude oil begins with ground, peeled and polished rice grain. This product can be used in animal nourishment or in oil extraction. Refinement from the crude rice oil takes the same steps than any other vegetable oil. As any other vegetable oil, rice oil is very prone to oxidation, this is due to the high percentage of polyinsaturated acids, despite the vitamin E content and its role of antioxidant. Therefore, sometimes additional stabilization is needed. The main purpose of this work is to characterize the Uruguayan Rice Oils by determining the following parameters: profile of fatty acids, alpha tocopherol, Iodine Index, Refraction Index, Saponification Index, Unsaponifiable Matter and Density at 20ºC. The Norm used as reference was the American Oil Chemistry Society. In this condition the statistical analysis performed shows that there is not a model that could explain the variability of the studied factors nor reduce the number of factors that must be taken into consideration. The Kolmogorov-Smirnov test, performed according to Lillieford correction to verify normality, showed that distribution of fluctuations that correspond to the three most abundant fatty acids studied (16:0, 18:1 and 18:2) can be considered as normal. The obtained values for the insaturated fatty acids were from15.6 to18.2 for 16:0, from 42.1 to 43.8 for 18:1 and from 34.8 to 37.4 for 18:2. These results obtained were correlated with the high values of the Iodine Index: 100.6 - 101.8. Results of vitamin E expressed as alpha tocopherol are between 7 and 35 mg/100g, but in 75% of the cases the results oscillated between 18 and 26 mg/100g. As the study of the residuals does not show evidence of lack of linear fit, we do not discard such adjust in this instance. Therefore it is possible that, introducing a substantially larger quantity of samples than the ones performed in the present preliminary study, could enable to find an appropriate and relatively simple model, which could explain the linear fit.
dc.format.none.fl_str_mv Pdf
dc.identifier.none.fl_str_mv https://catalogo.latu.org.uy/opac_css/index.php?lvl=notice_display&id=28161
28161
urn:ISBN:28578
dc.language.iso.none.fl_str_mv eng
dc.rights.license.none.fl_str_mv CC BY-NC-ND
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
CC BY-NC-ND
dc.source.none.fl_str_mv reponame:Catálogo digital del LATU
instname:Laboratorio Tecnológico del Uruguay
instacron:Laboratorio Tecnológico del Uruguay
dc.subject.none.fl_str_mv ACEITE DE ARROZ
URUGUAY
dc.title.none.fl_str_mv Uruguayan rice (Oritza sativa L.) oils characterization
dc.type.none.fl_str_mv info:eu-repo/semantics/conferenceObject
Publicado
dc.type.version.none.fl_str_mv info:eu-repo/semantics/publishedVersion
description The rice crop is one of the most developed agricultural activities in Uruguay, having become the third item of export. Although the main product of the rice chain is the elaborated rice, in the recent years several industries have begun to produce co-products of rice: crude rice oil and refined oil, rice flour and cookies. The production of crude oil begins with ground, peeled and polished rice grain. This product can be used in animal nourishment or in oil extraction. Refinement from the crude rice oil takes the same steps than any other vegetable oil. As any other vegetable oil, rice oil is very prone to oxidation, this is due to the high percentage of polyinsaturated acids, despite the vitamin E content and its role of antioxidant. Therefore, sometimes additional stabilization is needed. The main purpose of this work is to characterize the Uruguayan Rice Oils by determining the following parameters: profile of fatty acids, alpha tocopherol, Iodine Index, Refraction Index, Saponification Index, Unsaponifiable Matter and Density at 20ºC. The Norm used as reference was the American Oil Chemistry Society. In this condition the statistical analysis performed shows that there is not a model that could explain the variability of the studied factors nor reduce the number of factors that must be taken into consideration. The Kolmogorov-Smirnov test, performed according to Lillieford correction to verify normality, showed that distribution of fluctuations that correspond to the three most abundant fatty acids studied (16:0, 18:1 and 18:2) can be considered as normal. The obtained values for the insaturated fatty acids were from15.6 to18.2 for 16:0, from 42.1 to 43.8 for 18:1 and from 34.8 to 37.4 for 18:2. These results obtained were correlated with the high values of the Iodine Index: 100.6 - 101.8. Results of vitamin E expressed as alpha tocopherol are between 7 and 35 mg/100g, but in 75% of the cases the results oscillated between 18 and 26 mg/100g. As the study of the residuals does not show evidence of lack of linear fit, we do not discard such adjust in this instance. Therefore it is possible that, introducing a substantially larger quantity of samples than the ones performed in the present preliminary study, could enable to find an appropriate and relatively simple model, which could explain the linear fit.
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spelling Uruguayan rice (Oritza sativa L.) oils characterizationRODRIGUEZ, MARIA CECILIASUBURÚ, GABRIELATORRES, MARINAOLAZÁBAL, LAURATORRE, ALEJANDRAACEITE DE ARROZURUGUAYThe rice crop is one of the most developed agricultural activities in Uruguay, having become the third item of export. Although the main product of the rice chain is the elaborated rice, in the recent years several industries have begun to produce co-products of rice: crude rice oil and refined oil, rice flour and cookies. The production of crude oil begins with ground, peeled and polished rice grain. This product can be used in animal nourishment or in oil extraction. Refinement from the crude rice oil takes the same steps than any other vegetable oil. As any other vegetable oil, rice oil is very prone to oxidation, this is due to the high percentage of polyinsaturated acids, despite the vitamin E content and its role of antioxidant. Therefore, sometimes additional stabilization is needed. The main purpose of this work is to characterize the Uruguayan Rice Oils by determining the following parameters: profile of fatty acids, alpha tocopherol, Iodine Index, Refraction Index, Saponification Index, Unsaponifiable Matter and Density at 20ºC. The Norm used as reference was the American Oil Chemistry Society. In this condition the statistical analysis performed shows that there is not a model that could explain the variability of the studied factors nor reduce the number of factors that must be taken into consideration. The Kolmogorov-Smirnov test, performed according to Lillieford correction to verify normality, showed that distribution of fluctuations that correspond to the three most abundant fatty acids studied (16:0, 18:1 and 18:2) can be considered as normal. The obtained values for the insaturated fatty acids were from15.6 to18.2 for 16:0, from 42.1 to 43.8 for 18:1 and from 34.8 to 37.4 for 18:2. These results obtained were correlated with the high values of the Iodine Index: 100.6 - 101.8. Results of vitamin E expressed as alpha tocopherol are between 7 and 35 mg/100g, but in 75% of the cases the results oscillated between 18 and 26 mg/100g. As the study of the residuals does not show evidence of lack of linear fit, we do not discard such adjust in this instance. Therefore it is possible that, introducing a substantially larger quantity of samples than the ones performed in the present preliminary study, could enable to find an appropriate and relatively simple model, which could explain the linear fit.2006-01-01info:eu-repo/semantics/conferenceObjectPublicadoinfo:eu-repo/semantics/publishedVersionPdfhttps://catalogo.latu.org.uy/opac_css/index.php?lvl=notice_display&id=2816128161urn:ISBN:28578engPresentado en: 4th Euro Fed Lipid Congress, Madrid, Octubre 2006info:eu-repo/semantics/openAccessCC BY-NC-NDCC BY-NC-NDreponame:Catálogo digital del LATUinstname:Laboratorio Tecnológico del Uruguayinstacron:Laboratorio Tecnológico del Uruguay2020-06-12T20:39:40Zoai:PMBOAI:28161Gobiernohttps://latu.org.uy/https://catalogo.latu.org.uy/ws/PMBOAIlfiori@latu.org.uyUruguayopendoar:2024-08-01T14:48:37.581269Catálogo digital del LATU - Laboratorio Tecnológico del Uruguayfalse
spellingShingle Uruguayan rice (Oritza sativa L.) oils characterization
RODRIGUEZ, MARIA CECILIA
ACEITE DE ARROZ
URUGUAY
status_str publishedVersion
title Uruguayan rice (Oritza sativa L.) oils characterization
title_full Uruguayan rice (Oritza sativa L.) oils characterization
title_fullStr Uruguayan rice (Oritza sativa L.) oils characterization
title_full_unstemmed Uruguayan rice (Oritza sativa L.) oils characterization
title_short Uruguayan rice (Oritza sativa L.) oils characterization
title_sort Uruguayan rice (Oritza sativa L.) oils characterization
topic ACEITE DE ARROZ
URUGUAY
url https://catalogo.latu.org.uy/opac_css/index.php?lvl=notice_display&id=28161