Physicochemical characteristics and pollen spectrum of some north-east Algerian honeys.

Abstract

The qualities of seventeen honey samples harvested from the NorthEast areas of Algeria were evaluated by determining the pollen spectrum, pollen number quantity and physicochemical attributes. Pollen analysis can therefore be useful to determine the geographical and botanical origin of honeys. The following determinations were carried out: pH, density, acidity (free, lactone and total), moisture, electrical conductivity, hydroxymethylfurfural, diastase activity, apparent sucrose, and proteins. The results obtained in the present study show the variability of chemical composition of the honey samples. It proved that nine natural honeys are of blossoming origin; suitable for consumption and that one (T5 conferred Bougous) can be used with fine dietetics, it is very rich in pollen which is regarded as protein source. The remainder, eight honeys, were not in conformity with the International Regulatory Standards, their sugar contents (Sucrose) and hydroxymethylfurfural exceeded the International Regulatory Standards Review by the International Honey Commission, this was probably due to use of syrup for the over-feeding the bees during the spring. The sample Bouhachana (G1) had high water content (more than 20%), low density and electrical conductivity higher than 5 µS/cm, which makes it likely to undergo fermentation and degradation. Honeys of Guerguour (T1), Boutheldja (T2) and Bouhadjar (T3) had pH lower than the European standards concerning the quality control of the foodstuffs (exp. honey). These samples are fragile; so we cannot preserve them for a long period. The palynological analysis (qualitative and quantitative) of the harvested samples in the area, showed the absence of a honey obtained from only one melliferous plant. All honeys are polyfloral exits of the several plant species visited by the worker bees during their blossoming periods. Three families are the most represented in the groups of pollen of accompaniment (the secondary pollen ranged between 16-45%) and the pollen considered as rare (minor pollen 3-15%) in the counted total number of the pollen grains in 10 grams of honey. These forager honey families are: Myrtaceae presented by the Eucalyptus, Papilionaceae presented by Hedysarum coronarium which is a forager plant characterized by a very vast surface of development, and Rosaceae represented by orchard and forest species.The pollen grain number counted in honeys is very significant (between 80 000 and 24 832 000pollen grain), what makes it possible to classify the samples analyzed among the categories rich in pollen.

Palynological and Physicochemical Characterization of Honey in the Sudano-Guinean Zone of Cameroon

“…As indicated by Bogdanov et al [37], honey from flowers have low value of pH (3.3 -4.6). These results are in accordance with those of Mbogning et al [22] in the West and Adamawa region of Cameroon; Szczesna et al [38] in Poland; Xesús Feá et al [13] Portugal; Kombo [19] In the Adamawa region of Cameroon; Chefrour et al [15] in Algeria and Kayode and Oyeyemi [34] in Nigeria.…”

“…From all honey samples analysed, the values did not exceed the average standard (1.39 to 1.44 at 20˚C). The pH values and the density of honey in the three sites are comparable and they are closer to those of Chefrour et al [15] in the North East of Algeria.…”

“…This indicates that, some honey sample of our zone is not of good quality. Research on water contents in Poland honey by Szczesna et al [38] and in Algeria by Chefrour et al [15] therefore corresponds to the norms. They are however lower to those noted in the work of Kombo [19] and Mbogning et al [22] in the West and Adamawa zone of Cameroon.…”

“…Moreover, honey with a low pH of about 3.5 like sample 18 in Vina is regarded as fragile product for the preservation [15].…”

“…Honey from honeybees has significant nutritional and medicinal benefits. It is a rich source of readily available sugars, organic acids, various amino acids and in addition source of many biologically active compounds [15].…”