Diastase and invertase activities in Andalusian honeys

Abstract

Forty-nine samples of unheated, commercially purchased Andalusian (southern Spain) honeys were examined for diastase (a-and b-amylase) and invertase (a-glucosidase) activities. The honeys were from Citrus sp. (5), Sunflower (2), Rosmarinus (3), Eucalyptus sp. (4) or multifloral in origin (35). Mean value for diastase was 20.48 ± 10.14 (range 3.99-49.42) expressed as diastase number in Gothe's scale, for invertase it was 12.34 ± 8.09 (range 1.2-36.8) expressed as invertase number. Correlation was found between invertase and diastase activities (r ¼ 0.853). These results were compared with literature data and differences are discussed.

Effect of high hydrostatic pressure on antimicrobial activity and quality of Manuka honey

“…It is clear from Table 2 that HHP does not influence HMF values over the entire range of variables studied. However, HMF concentrations generally tended to increase with temperature and treatment time at ambient pressure, consistent with earlier studies (Sahinler, 2007;Serrano, Espejo, Villarejo, & Jodral, 2007). Based on the above results, it is evident that HHP technology has no adverse effect on the quality of Manuka honey.…”

Characterization ofEucalyptus GlobulusHoneys Produced in the Eurosiberian Area of the Iberian Peninsula

“…[13,33,34] The studied honeys had a low HMF content and complied with the limitation of the EU Directive. These were fresh honeys, provided by beekeepers that use no heating treatment for the extraction and processing the honey.…”

“…Other studies showed for Eucalyptus camaldulensis honey, values higher than 13.2 • Gothe and 19.1 IN. [1,[33][34][35][36][37] The low enzymatic content of this honey type could be related with the time of honey production in early spring. In this period, the population of the bee colony increases, with the queen bee laying a high number of eggs, therefore honeybees have to feed the brood.…”

Characterization of Algerian honeys by palynological and physico-chemical methods

“…IV) it is interesting to note that similar results were also reported from Spain. In their study on Andalusian honeys Serrano et al (2007) found a correlation between the enzymes diastase and invertase (correlation coefficient 0.85). In our study this correlation is somewhat lower probably due to our hot climate coupled with the fact that the enzyme diastase is more heat resistant than invertase.…”