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Valorização do mel dos Açores : caraterização físico-química, polínica e atividade antimicrobiana
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| Resumo, Índice, Introdução | 209 KB | Adobe PDF | ||
| Documento Principal | 3.14 MB | Adobe PDF |
Authors
Abstract(s)
A produção apícola tem vindo a aumentar nos Açores ao longo dos últimos anos, quer em quantidade, quer em qualidade. Apesar disso, a Região não é ainda autossuficiente no que toca a este produto. Dadas as especificidades edafoclimáticas e florísticas da Região, o mel dos Açores é considerado único, fato este que foi reconhecido ao ser-lhe atribuído estatuto de Denominação de Origem Protegida em 1993. Nessa altura, foi preparado o respetivo Caderno de Encargos, que não contém, contudo, as características físico-químicas e polínicas a que o Mel dos Açores deverá obedecer, dificultando o desenvolvimento dos processos de certificação das origens geográfica e floral.
Nalgumas regiões do mundo com tradição de produção de mel, possuidoras de flora específica, como sucede com os Açores, têm promovido e valorizado os seus produtos apícolas com base no seu potencial para o combate a infeções bacterianas.
Foram objetivos deste trabalho caracterizar uma amostra representativa dos méis dos Açores quanto às suas propriedades físico-químicas (teor de água, matérias insolúveis, condutividade elétrica, acidez livre, pH, teor em açúcares, índice diastásico e teor em hidroximetilfurfural), perfil polínico e atividade antimicrobiana contra oito bactérias patogénicas (Escherichia coli ATCC 25922, Pseudomonas aeruginosa ATCC 27853, Listeria monocytogenes ATCC 7466, Clostridium perfringens ATCC 8357, Streptococcus pyogenes, Proteus spp., Staphylococcus aureus ATCC 29523 e S. aureus ATCC 9144). Utilizaram-se 39 amostras de mel provenientes de 8 das 9 ilhas dos Açores. Os métodos de análise empregues foram os métodos padrão.
Do ponto de vista das análises físico-químicas, todas as amostras analisadas cumpriram o previsto na legislação, exceto no que toca ao índice diastásico, o que pode dever-se à sua origem floral ou às especificidades da produção, uma vez que os restantes fatores não indiciam adulteração. Como elemento da certificação de origem geográfica, o perfil polínico dos méis produzidos nos Açores deve apresentar a presença dos seguintes tipos polínicos: Pittosporum undulatum, Trifolium repens e Morella faya.
Quer pelo seu espetro de inibição quer pela sua potência, alguns méis têm elevado potencial como agentes terapêuticos contra infeções superficiais. O patógeno mais frequentemente inibido foi o S. pyogenes, enquanto que o menor número de inibições se verificou no S. aureus ATCC 29523.
ABSTRACT: In the Azores, honey production has increased throughout the last few years, both in quantity and in quality. However, the Region is not yet self-sufficient in terms of this product. Due to the specific climate, soil and flora characteristics of the Region, Azorean honey is considered unique, a fact that has been recognized when, in 1993, it was granted Protected Denomination of Origin (PDO) status. At that time, its PDO Specifications were prepared without indicating the physico-chemical and pollinic characteristics Azorean honey must fulfil, making it difficult to develop the processes of geographical and floral origins. In some regions of the world, with tradition in honey production, that have a specific flora, such as in the Azores, the promotion and valorisation of honey has been based on its potential to fight bacterial infections. The objectives of the present work were to characterize a representative sample of Azorean honeys regarding their physico-chemical properties (water content, insoluble matter, electric conductivity, free acidity, pH, sugar content, diastasic index and hidroximetilfurfural content), pollinic profile and antimicrobial activity against eight pathogenic bacteria (Escherichia coli ATCC 25922, Pseudomonas aeruginosa ATCC 27853, Listeria monocytogenes ATCC 7466, Clostridium perfringens ATCC 8357, Streptococcus pyogenes, Proteus spp., Staphylococcus aureus ATCC 29523 and S. aureus ATCC 9144). Thirty-nine honey samples, from eight of the nine Azorean islands were used. Standard analysis methods were employed. Regarding the physico-chemical analyses, all of the studied samples were within the legal limits, except the diastasic index. This may be attributed to the honeys’ floral origin and/or the production specificities, since no indication of adulteration was shown by the other physico-chemical parameters. As an element for the certification of the geographic origin, the pollinic profile of the honeys produced in the Azores must present the following pollinic types: Pittosporum undulatum, Trifolium repens and Morella faya. Both due to their inhibition spectra and inhibitory potencial, some honeys have a high potential as therapeutic agents against superficial infections. The most frequently inhibited pathogen was S. pyogenes, whereas the lowest number of inhibitions was observed for S. aureus ATCC 29523.
ABSTRACT: In the Azores, honey production has increased throughout the last few years, both in quantity and in quality. However, the Region is not yet self-sufficient in terms of this product. Due to the specific climate, soil and flora characteristics of the Region, Azorean honey is considered unique, a fact that has been recognized when, in 1993, it was granted Protected Denomination of Origin (PDO) status. At that time, its PDO Specifications were prepared without indicating the physico-chemical and pollinic characteristics Azorean honey must fulfil, making it difficult to develop the processes of geographical and floral origins. In some regions of the world, with tradition in honey production, that have a specific flora, such as in the Azores, the promotion and valorisation of honey has been based on its potential to fight bacterial infections. The objectives of the present work were to characterize a representative sample of Azorean honeys regarding their physico-chemical properties (water content, insoluble matter, electric conductivity, free acidity, pH, sugar content, diastasic index and hidroximetilfurfural content), pollinic profile and antimicrobial activity against eight pathogenic bacteria (Escherichia coli ATCC 25922, Pseudomonas aeruginosa ATCC 27853, Listeria monocytogenes ATCC 7466, Clostridium perfringens ATCC 8357, Streptococcus pyogenes, Proteus spp., Staphylococcus aureus ATCC 29523 and S. aureus ATCC 9144). Thirty-nine honey samples, from eight of the nine Azorean islands were used. Standard analysis methods were employed. Regarding the physico-chemical analyses, all of the studied samples were within the legal limits, except the diastasic index. This may be attributed to the honeys’ floral origin and/or the production specificities, since no indication of adulteration was shown by the other physico-chemical parameters. As an element for the certification of the geographic origin, the pollinic profile of the honeys produced in the Azores must present the following pollinic types: Pittosporum undulatum, Trifolium repens and Morella faya. Both due to their inhibition spectra and inhibitory potencial, some honeys have a high potential as therapeutic agents against superficial infections. The most frequently inhibited pathogen was S. pyogenes, whereas the lowest number of inhibitions was observed for S. aureus ATCC 29523.
Description
Dissertação de Mestrado, Engenharia Zootécnica, 26 de maio de 2017, Universidade dos Açores.
Keywords
Apicultura Mel (atividade antibacteriana) Mel (caracterização físico-química) Mel (perfil polínico) Açores Antibacterial Activity Honey Physico-Chemical Characterization Pollinic Profile Azores
Citation
Tomé, Nuno Miguel Aguiar. "Valorização do mel dos Açores: caraterização físico-química, polínica e atividade antimicrobiana". 2017. 91 p.. (Dissertação de Mestrado em Engenharia Zootécnica). Angra do Heroísmo: Universidade dos Açores, 2016. [Consult. Dia Mês Ano]. Disponível em www:<http://hdl.handle.net/10400.3/4628>.