4 research outputs found
CaracterizaciĂłn fisicoquĂmica de mieles monoflorales de Euphorbia resinifera
The physicochemical characteristics of Euphorbia resinifera honey were studied. Considering the low
water content, the majority of the honeys presented a proper maturity. The values of acidity
revealed the absence of inappropriate fermentation, while the low values of hydroxymethylfurfural
(0.4–16.48 mg/kg) were suitable for of unprocessed honeys. The average values for electrical
conductivity and ashes were 451 µS/cm and 1.6 g/kg, respectively. As for the mineral content, the
K was the most abundant element; Ca, Na, Mg, P, S, and Si are all present in differing quantities in
the honeys. On the other hand, Principal Components Analysis (PCA) and Stepwise Discriminant
Analysis (SDA) were applied to distinguish between three related Euphorbia honey types. PCA
showed that the cumulative variance of the two first factors explained approximately 53%. The
results of SDA showed that variables with a higher discriminant power were K, C*ab and a*, and
100% of the samples were properly classified in their corresponding class.Los parámetros fisicoquĂmicos de 29 de mieles monoflorales de Euphorbia resinifera fueron estudiadas.
24 parámetros, incluyendo humedad, pH, acidez (libre, lactónica y total), HMF, cenizas, conductividad
eléctrica, monosacáridos (glucosa y fructosa), contenido mineral y parámetros cromáticos fueron
analizados. Desde el punto de vista de su calidad las mieles fueron acordes con la legislaciĂłn
Europea en cuanto a contenido en agua, acidez y HMF. Los valores de cenizas y conductividad
eléctrica fueron 1,6 g/kg y 451 μS/cm, respectivamente. El contenido en minerales mostró que el K es
el elemento más abundante; mientras que Ca, Na, Mg, P, S y Si se presentaron en contenidos
intermedios. En cuanto a los valores de los parámetros del color fueron tĂpicos de mieles ámbar
claras. Se ha realizado un análisis estadĂstico multivariante a los datos obtenidos para diferenciar tres
especies de mieles de Euphorbia. El análisis discriminante permite diferencia las mieles por su origen
botánico siendo el contenido en K, C*ab y la variable cromática a* las variables con mayor poder
discriminate, siendo el 100% de las muestras clasificadas correctamente en su grupo
A palynological and geographical characterization of labeled resin spurge honey: Euphorbia resinifera
Antioxidant activity and enzyme inhibitory potential of Euphorbia resinifera and E. officinarum honeys from Morocco and plant aqueous extracts
Natural products may be applied in a wide range of domains, from agriculture to food and pharmaceutical industries. In this study, the antioxidant properties and the capacity to inhibit some enzymatic activities ofEuphorbia resiniferaandEuphorbia officinarumaqueous extracts and honeys were assessed. The physicochemical characteristics were also evaluated. Higher amounts of iron, copper and aluminium were detected inE. officinarumhoney, which may indicate environmental pollution around the beehives or inadequate storage of honey samples. This honey sample showed higher amounts of total phenols and better capacity for scavenging superoxide anion free radicals and DPPH free radicals as compared withE. resiniferahoney, but poorer capacity for inhibiting lipoxygenase, acetylcholinesterase, tyrosinase and xanthine oxidase. The ratio plant mass:solvent volume (1:100) and extraction time (1 - 2 h) were associated with higher total phenols and better antioxidant activities and lipoxygenase, acetylcholinesterase and tyrosinase inhibitory activities, regardless of the plant species. The aqueous extracts had systematically higher in vitro activities than the respective honey samples.FCTPortuguese Foundation for Science and TechnologyEuropean Commission [UID/MAR/00350/2020]info:eu-repo/semantics/publishedVersio