Publicação
Validação de um dispositivo não-invasivo e não-destrutivo para avaliação do estado de maturação das uvas
| Resumo: | In this work, WinePen validation procedures were applied in order to verify the robustness of the device in the field and the models used to estimate the parameters Brix, Titratable acidity and Anthocyanins. This device’s operating system is based on reflectance and fluorescence. This validation was held in 2013, on vineyards with white and red varieties, in the Superior Institute of Agronomy, situated in the Wine Region of Lisbon. For WinePen validations, 25 berries of each variety were measured, under different conditions (laboratory and field) in order to verify the light effect on measurements. The berries were first analyzed by WinePen and afterwards examined in the laboratory. In order to select the best models, the fitting quality of the observed values was evaluated using the following deviance measures: determination coefficient (R2), mean absolute error (MAE); root mean square error (RMSE). High and significant correlations for Brix (0.93 to 0.96) and for titratable acidity (0.86 to 0.96) were observed for different types of environment (laboratory and field) and for different varieties (whites and reds). However, the anthocyanins parameter observed lower and less significant correlations (0.70) in both reading conditions. Thereby, the results obtained demonstrate the reliability of measurements performed by WinePen for different varieties and environments |
|---|---|
| Autores principais: | Graça, João Nuno Duarte |
| Assunto: | grapevine brix titratable acidity anthocyanins reflectance fluorescence |
| Ano: | 2014 |
| País: | Portugal |
| Tipo de documento: | dissertação de mestrado |
| Tipo de acesso: | acesso aberto |
| Instituição associada: | Universidade de Lisboa |
| Idioma: | português |
| Origem: | Repositório da Universidade de Lisboa |
| _version_ | 1866811202275901440 |
|---|---|
| author | Graça, João Nuno Duarte |
| author_facet | Graça, João Nuno Duarte |
| author_role | author |
| contributor_name_str_mv | Lopes, Carlos Manuel Antunes Repositório Científico de Acesso Aberto da ULisboa |
| country_str | PT |
| creators_json_txt | [{\"Person.name\":\"Graça, João Nuno Duarte\"}] |
| datacite.contributors.contributor.contributorName.fl_str_mv | Lopes, Carlos Manuel Antunes Repositório Científico de Acesso Aberto da ULisboa |
| datacite.creators.creator.creatorName.fl_str_mv | Graça, João Nuno Duarte |
| datacite.date.Accepted.fl_str_mv | 2014-01-01T00:00:00Z |
| datacite.date.available.fl_str_mv | 2014-05-19T14:20:21Z |
| datacite.date.embargoed.fl_str_mv | 2014-05-19T14:20:21Z |
| datacite.rights.fl_str_mv | http://purl.org/coar/access_right/c_abf2 |
| datacite.subjects.subject.fl_str_mv | grapevine brix titratable acidity anthocyanins reflectance fluorescence |
| datacite.titles.title.fl_str_mv | Validação de um dispositivo não-invasivo e não-destrutivo para avaliação do estado de maturação das uvas |
| dc.contributor.none.fl_str_mv | Lopes, Carlos Manuel Antunes Repositório Científico de Acesso Aberto da ULisboa |
| dc.creator.none.fl_str_mv | Graça, João Nuno Duarte |
| dc.date.Accepted.fl_str_mv | 2014-01-01T00:00:00Z |
| dc.date.available.fl_str_mv | 2014-05-19T14:20:21Z |
| dc.date.embargoed.fl_str_mv | 2014-05-19T14:20:21Z |
| dc.format.none.fl_str_mv | application/pdf |
| dc.identifier.none.fl_str_mv | http://hdl.handle.net/10400.5/6808 |
| dc.language.none.fl_str_mv | por |
| dc.publisher.none.fl_str_mv | ISA |
| dc.rights.none.fl_str_mv | http://purl.org/coar/access_right/c_abf2 |
| dc.subject.none.fl_str_mv | grapevine brix titratable acidity anthocyanins reflectance fluorescence |
| dc.title.fl_str_mv | Validação de um dispositivo não-invasivo e não-destrutivo para avaliação do estado de maturação das uvas |
| dc.type.none.fl_str_mv | http://purl.org/coar/resource_type/c_bdcc |
| description | In this work, WinePen validation procedures were applied in order to verify the robustness of the device in the field and the models used to estimate the parameters Brix, Titratable acidity and Anthocyanins. This device’s operating system is based on reflectance and fluorescence. This validation was held in 2013, on vineyards with white and red varieties, in the Superior Institute of Agronomy, situated in the Wine Region of Lisbon. For WinePen validations, 25 berries of each variety were measured, under different conditions (laboratory and field) in order to verify the light effect on measurements. The berries were first analyzed by WinePen and afterwards examined in the laboratory. In order to select the best models, the fitting quality of the observed values was evaluated using the following deviance measures: determination coefficient (R2), mean absolute error (MAE); root mean square error (RMSE). High and significant correlations for Brix (0.93 to 0.96) and for titratable acidity (0.86 to 0.96) were observed for different types of environment (laboratory and field) and for different varieties (whites and reds). However, the anthocyanins parameter observed lower and less significant correlations (0.70) in both reading conditions. Thereby, the results obtained demonstrate the reliability of measurements performed by WinePen for different varieties and environments |
| dirty | 0 |
| eu_rights_str_mv | openAccess |
| format | masterThesis |
| fulltext.url.fl_str_mv | https://repositorio.ulisboa.pt/bitstreams/575bca55-0817-4045-a056-88951f7f90c8/download |
| id | ul_52bd8d2b326f298e996a03a4e49ebdff |
| identifier.url.fl_str_mv | http://hdl.handle.net/10400.5/6808 |
| instacron_str | ul |
| institution | Universidade de Lisboa |
| instname_str | Universidade de Lisboa |
| language | por |
| network_acronym_str | ul |
| network_name_str | Repositório da Universidade de Lisboa |
| oai_identifier_str | oai:repositorio.ulisboa.pt:10400.5/6808 |
| organization_str_mv | urn:organizationAcronym:ul |
| person_str_mv | Graça, João Nuno Duarte |
| publishDate | 2014 |
| publisher.none.fl_str_mv | ISA |
| reponame_str | Repositório da Universidade de Lisboa |
| repository_id_str | urn:repositoryAcronym:ul |
| service_str_mv | urn:repositoryAcronym:ul |
| spelling | porISAporIn this work, WinePen validation procedures were applied in order to verify the robustness of the device in the field and the models used to estimate the parameters Brix, Titratable acidity and Anthocyanins. This device’s operating system is based on reflectance and fluorescence. This validation was held in 2013, on vineyards with white and red varieties, in the Superior Institute of Agronomy, situated in the Wine Region of Lisbon. For WinePen validations, 25 berries of each variety were measured, under different conditions (laboratory and field) in order to verify the light effect on measurements. The berries were first analyzed by WinePen and afterwards examined in the laboratory. In order to select the best models, the fitting quality of the observed values was evaluated using the following deviance measures: determination coefficient (R2), mean absolute error (MAE); root mean square error (RMSE). High and significant correlations for Brix (0.93 to 0.96) and for titratable acidity (0.86 to 0.96) were observed for different types of environment (laboratory and field) and for different varieties (whites and reds). However, the anthocyanins parameter observed lower and less significant correlations (0.70) in both reading conditions. Thereby, the results obtained demonstrate the reliability of measurements performed by WinePen for different varieties and environmentsapplication/pdfporValidação de um dispositivo não-invasivo e não-destrutivo para avaliação do estado de maturação das uvasGraça, João Nuno DuarteLopes, Carlos Manuel AntunesHostingInstitutionOrganizationalRepositório Científico de Acesso Aberto da ULisboae-mailmailto:repositorio@reitoria.ulisboa.ptrepositorio@reitoria.ulisboa.ptURNurn:tid:2036990682014-05-19T14:20:21Z20142014-01-01T00:00:00ZHandlehttp://hdl.handle.net/10400.5/6808http://purl.org/coar/access_right/c_abf2open accessgrapevinebrixtitratable acidityanthocyaninsreflectancefluorescence2258410 bytesliteraturehttp://purl.org/coar/resource_type/c_bdccmaster thesishttp://purl.org/coar/access_right/c_abf2application/pdffulltexthttps://repositorio.ulisboa.pt/bitstreams/575bca55-0817-4045-a056-88951f7f90c8/download |
| spellingShingle | Validação de um dispositivo não-invasivo e não-destrutivo para avaliação do estado de maturação das uvas Graça, João Nuno Duarte grapevine brix titratable acidity anthocyanins reflectance fluorescence |
| status | SINGLETON |
| subject.fl_str_mv | grapevine brix titratable acidity anthocyanins reflectance fluorescence |
| title | Validação de um dispositivo não-invasivo e não-destrutivo para avaliação do estado de maturação das uvas |
| title_full | Validação de um dispositivo não-invasivo e não-destrutivo para avaliação do estado de maturação das uvas |
| title_fullStr | Validação de um dispositivo não-invasivo e não-destrutivo para avaliação do estado de maturação das uvas |
| title_full_unstemmed | Validação de um dispositivo não-invasivo e não-destrutivo para avaliação do estado de maturação das uvas |
| title_short | Validação de um dispositivo não-invasivo e não-destrutivo para avaliação do estado de maturação das uvas |
| title_sort | Validação de um dispositivo não-invasivo e não-destrutivo para avaliação do estado de maturação das uvas |
| topic | grapevine brix titratable acidity anthocyanins reflectance fluorescence |
| topic_facet | grapevine brix titratable acidity anthocyanins reflectance fluorescence |
| url | http://hdl.handle.net/10400.5/6808 |
| visible | 1 |