Características palinológicas de las mieles de castaño de Galicia (NO España). Se han estudiado m... more Características palinológicas de las mieles de castaño de Galicia (NO España). Se han estudiado melisopalinológicamente 83 muestras de miel de Galicia con porcentajes superiores al 70% de polen de Castanea. El 46% de las muestras presenta porcentajes de este tipo polínico comprendidos entre el 70% y el 79%, el 43% valores entre el 80% y el 89% y el 11% restante valores de este polen superiores al 89%. El número medio de tipos polínicos es de 21 y el índice de mielada es nulo o muy bajo para todas las muestras. En cuanto a la riqueza polínica presentan una media de 26.384 granos de polen por gramo de miel. Otros tipos polínicos presentes en estas mieles son: Rubus, Erica, Eucalyptus, Cytisus y Campanula. Este tipo de mieles se producen, principalmente, en las provincias de Lugo y Ourense. En Lugo, la zona centro y las sierras orientales son las de mayor producción. En Ourense lo son las zonas de montaña de las sierras de Manzaneda, Queixa, San Mamede, el valle del Sil y el límite de ...
Se ha realizado el análisis polínico de 12 muestras recogidas de forma secuencial durante el peri... more Se ha realizado el análisis polínico de 12 muestras recogidas de forma secuencial durante el periodo de producción de miel en tres colmenas, ubicadas en Nogueira de Ramuin (Orense), comparando los resultados obtenidos con el espectro polínico de la mezcla final. Se observan diferencias importantes entre las muestras parciales, que ponen de manifiesto el pecoreo selectivo de las distintas colonias.
Forty-four samples of floral and honeydew honeys from Croatia, Greece, Italy, Mexico, New Zealand... more Forty-four samples of floral and honeydew honeys from Croatia, Greece, Italy, Mexico, New Zealand, Portugal, South Africa, Spain and Tanzania were microscopically examined for fungal spores. Most of the floral honeys were dominated by yeast cells of Metschnikowia reukaufii and contained very few conidia of hyphomycete species. By contrast, honeydew honeys contained scoleco-and stauroconidia belonging to more than 30 hyphomycete species, most of them previously reported from rainwater on living trees. Most belonged to the genera Tripospermum, Retiarius and Trinacrium. Their concentrations were highest in the honeydew honey from Abies alba and Picea excelsa. Conidia belonging to species of Camposporium, Ceratosporium, Dwayaangam, Tricellula, Tricladium and Trifurcospora, well-known litter-inhabiting fungi in terrestrial and/or aquatic habitats were encountered. Some other conidia probably belonged to species of Articulospora, Curucispora, Gyoerffyella, Lemonniera and Varicosporium, al...
Tipos polínicos de las mieles comercializadas de Galicia. Se ha realizado un estudio de las miele... more Tipos polínicos de las mieles comercializadas de Galicia. Se ha realizado un estudio de las mieles de producción gallega existentes en el mercado. De las 39 muestras analizadas, tres han resultado monoflorales de Castanea, otras tantas monoflorales de Eucalyptus, cinco monoflorales de Rubus y el resto han sido milflorales. La mayoría de las mieles comercializadas proceden de las provincias de A Coruña y Lugo y en relación a sus características palinológicas, no difieren en gran medida de las procedentes de pequeños productores.
Abstract Fifty-four honey samples collected over two consecutive harvest seasons (2009–2010) from... more Abstract Fifty-four honey samples collected over two consecutive harvest seasons (2009–2010) from different floristic areas of Romania were analysed. A melissopalynological analysis including qualitative and quantitative analyses was carried out in order to identify the principal pollen types in Romanian honeys and therefore, the important plants exploited by Apis mellifera in this country. Seventy-seven pollen types from 35 botanical families were identified. The main pollen forms were: Brassica napus-type, Tilia, Helianthus annuus, Robinia pseudoacacia, Prunus, Castanea sativa, Fragaria-type and Plantago-type. Honey samples were classified as: acacia honey (Robinia pseudoacacia), lime honey (Tilia), rape honey (Brassica napus-type), sunflower honey (Helianthus annuus), cherry honey (Prunus). Three of them were honeydew honeys whereas the others were all polyfloral. The results from this study can be used as a palynological baseline data of Romanian artisanal honeys.
The present work provides information regarding the statistical relationships among the palynolog... more The present work provides information regarding the statistical relationships among the palynological characteristics, sugars (fructose, glucose, sucrose, melezitose and maltose), moisture content and sugar ratios (F+G, F/G and G/W) of 136 different honey types (including bramble, chestnut, eucalyptus, heather, acacia, lime, rape, sunflower and honeydew). Results of the statistical analyses (multiple comparison Bonferroni test, Spearman rank correlations and principal components) revealed the valuable significance of the botanical origin on the sugar ratios (F+G, F/G and G/W). Brassica napus and Helianthus annuus pollen were the variables situated near F+G and G/W ratio, while Castanea sativa, Rubus and Eucalyptus pollen were located further away, as shown in the principal component analysis. The F/G ratio of sunflower, rape and lime honeys were lower than those found for the chestnut, eucalyptus, heather, acacia and honeydew honeys (>1.4). A lower value F/G ratio and lower water content were related with a faster crystallization in the honey.
One hundred eighty-seven honey samples from an Atlantic European area were studied to determine t... more One hundred eighty-seven honey samples from an Atlantic European area were studied to determine their nutritional compositions and antioxidant capacities, as well as the relationships between them. The results showed that heather, polyfloral, blackberry, and eucalyptus honeys had the highest carbohydrate contents, whereas honeydew and chestnut honeys had the lowest. There were some important differences among the honey types, which were related to the presence of minor components. The protein contents were significantly higher in honeydew and chestnut honeys, and the same results were obtained for mineral contents. Related to the presence of several antioxidant compounds, heather honey had the highest phenolic content, whereas honeydew and chestnut honeys had the highest flavonoid contents. Multivariate analysis showed that some variables, such as the amounts of flavonoids, minerals, proteins, and phenols, were significantly correlated with antioxidant activity. The regression analysis produced a significant model (R(2)=0.716; F=154.680; P<0.001) that related the antioxidant activity and the flavonoids, K, and P contents.
... b REQUIMTE/Laboratório de Farmacognosia, Departamento de Química, Faculdade de Farmácia, Univ... more ... b REQUIMTE/Laboratório de Farmacognosia, Departamento de Química, Faculdade de Farmácia, Universidade do Porto, R. Aníbal Cunha, 164, 4050-047 ... derived directly from the honey sources, among others constituents (Gil, Ferreres, Ortiz, Subra & Tom s-Barber n, 1995 ...
... Abstract SEIJO, MC., AIRA, MJ & JATO, MV-1998. Distribution and palynological caracteris-... more ... Abstract SEIJO, MC., AIRA, MJ & JATO, MV-1998. Distribution and palynological caracteris-ties ofEucaivptus honey from Galicia (NW Spain). ... Florece entre los meses de Mayo y Julio siendo su aprovechamiento principal el polen. [55N:t>2¡4-4565 Botanica Compiutensis [998. ...
Características palinológicas de las mieles de castaño de Galicia (NO España). Se han estudiado m... more Características palinológicas de las mieles de castaño de Galicia (NO España). Se han estudiado melisopalinológicamente 83 muestras de miel de Galicia con porcentajes superiores al 70% de polen de Castanea. El 46% de las muestras presenta porcentajes de este tipo polínico comprendidos entre el 70% y el 79%, el 43% valores entre el 80% y el 89% y el 11% restante valores de este polen superiores al 89%. El número medio de tipos polínicos es de 21 y el índice de mielada es nulo o muy bajo para todas las muestras. En cuanto a la riqueza polínica presentan una media de 26.384 granos de polen por gramo de miel. Otros tipos polínicos presentes en estas mieles son: Rubus, Erica, Eucalyptus, Cytisus y Campanula. Este tipo de mieles se producen, principalmente, en las provincias de Lugo y Ourense. En Lugo, la zona centro y las sierras orientales son las de mayor producción. En Ourense lo son las zonas de montaña de las sierras de Manzaneda, Queixa, San Mamede, el valle del Sil y el límite de ...
Se ha realizado el análisis polínico de 12 muestras recogidas de forma secuencial durante el peri... more Se ha realizado el análisis polínico de 12 muestras recogidas de forma secuencial durante el periodo de producción de miel en tres colmenas, ubicadas en Nogueira de Ramuin (Orense), comparando los resultados obtenidos con el espectro polínico de la mezcla final. Se observan diferencias importantes entre las muestras parciales, que ponen de manifiesto el pecoreo selectivo de las distintas colonias.
Forty-four samples of floral and honeydew honeys from Croatia, Greece, Italy, Mexico, New Zealand... more Forty-four samples of floral and honeydew honeys from Croatia, Greece, Italy, Mexico, New Zealand, Portugal, South Africa, Spain and Tanzania were microscopically examined for fungal spores. Most of the floral honeys were dominated by yeast cells of Metschnikowia reukaufii and contained very few conidia of hyphomycete species. By contrast, honeydew honeys contained scoleco-and stauroconidia belonging to more than 30 hyphomycete species, most of them previously reported from rainwater on living trees. Most belonged to the genera Tripospermum, Retiarius and Trinacrium. Their concentrations were highest in the honeydew honey from Abies alba and Picea excelsa. Conidia belonging to species of Camposporium, Ceratosporium, Dwayaangam, Tricellula, Tricladium and Trifurcospora, well-known litter-inhabiting fungi in terrestrial and/or aquatic habitats were encountered. Some other conidia probably belonged to species of Articulospora, Curucispora, Gyoerffyella, Lemonniera and Varicosporium, al...
Tipos polínicos de las mieles comercializadas de Galicia. Se ha realizado un estudio de las miele... more Tipos polínicos de las mieles comercializadas de Galicia. Se ha realizado un estudio de las mieles de producción gallega existentes en el mercado. De las 39 muestras analizadas, tres han resultado monoflorales de Castanea, otras tantas monoflorales de Eucalyptus, cinco monoflorales de Rubus y el resto han sido milflorales. La mayoría de las mieles comercializadas proceden de las provincias de A Coruña y Lugo y en relación a sus características palinológicas, no difieren en gran medida de las procedentes de pequeños productores.
Abstract Fifty-four honey samples collected over two consecutive harvest seasons (2009–2010) from... more Abstract Fifty-four honey samples collected over two consecutive harvest seasons (2009–2010) from different floristic areas of Romania were analysed. A melissopalynological analysis including qualitative and quantitative analyses was carried out in order to identify the principal pollen types in Romanian honeys and therefore, the important plants exploited by Apis mellifera in this country. Seventy-seven pollen types from 35 botanical families were identified. The main pollen forms were: Brassica napus-type, Tilia, Helianthus annuus, Robinia pseudoacacia, Prunus, Castanea sativa, Fragaria-type and Plantago-type. Honey samples were classified as: acacia honey (Robinia pseudoacacia), lime honey (Tilia), rape honey (Brassica napus-type), sunflower honey (Helianthus annuus), cherry honey (Prunus). Three of them were honeydew honeys whereas the others were all polyfloral. The results from this study can be used as a palynological baseline data of Romanian artisanal honeys.
The present work provides information regarding the statistical relationships among the palynolog... more The present work provides information regarding the statistical relationships among the palynological characteristics, sugars (fructose, glucose, sucrose, melezitose and maltose), moisture content and sugar ratios (F+G, F/G and G/W) of 136 different honey types (including bramble, chestnut, eucalyptus, heather, acacia, lime, rape, sunflower and honeydew). Results of the statistical analyses (multiple comparison Bonferroni test, Spearman rank correlations and principal components) revealed the valuable significance of the botanical origin on the sugar ratios (F+G, F/G and G/W). Brassica napus and Helianthus annuus pollen were the variables situated near F+G and G/W ratio, while Castanea sativa, Rubus and Eucalyptus pollen were located further away, as shown in the principal component analysis. The F/G ratio of sunflower, rape and lime honeys were lower than those found for the chestnut, eucalyptus, heather, acacia and honeydew honeys (>1.4). A lower value F/G ratio and lower water content were related with a faster crystallization in the honey.
One hundred eighty-seven honey samples from an Atlantic European area were studied to determine t... more One hundred eighty-seven honey samples from an Atlantic European area were studied to determine their nutritional compositions and antioxidant capacities, as well as the relationships between them. The results showed that heather, polyfloral, blackberry, and eucalyptus honeys had the highest carbohydrate contents, whereas honeydew and chestnut honeys had the lowest. There were some important differences among the honey types, which were related to the presence of minor components. The protein contents were significantly higher in honeydew and chestnut honeys, and the same results were obtained for mineral contents. Related to the presence of several antioxidant compounds, heather honey had the highest phenolic content, whereas honeydew and chestnut honeys had the highest flavonoid contents. Multivariate analysis showed that some variables, such as the amounts of flavonoids, minerals, proteins, and phenols, were significantly correlated with antioxidant activity. The regression analysis produced a significant model (R(2)=0.716; F=154.680; P<0.001) that related the antioxidant activity and the flavonoids, K, and P contents.
... b REQUIMTE/Laboratório de Farmacognosia, Departamento de Química, Faculdade de Farmácia, Univ... more ... b REQUIMTE/Laboratório de Farmacognosia, Departamento de Química, Faculdade de Farmácia, Universidade do Porto, R. Aníbal Cunha, 164, 4050-047 ... derived directly from the honey sources, among others constituents (Gil, Ferreres, Ortiz, Subra & Tom s-Barber n, 1995 ...
... Abstract SEIJO, MC., AIRA, MJ & JATO, MV-1998. Distribution and palynological caracteris-... more ... Abstract SEIJO, MC., AIRA, MJ & JATO, MV-1998. Distribution and palynological caracteris-ties ofEucaivptus honey from Galicia (NW Spain). ... Florece entre los meses de Mayo y Julio siendo su aprovechamiento principal el polen. [55N:t>2¡4-4565 Botanica Compiutensis [998. ...
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