Detection of the Electrical Conductivity and Acidity of Honey from Different Areas of Tepi
Honey is the ingredient of most industrial products for sweetening and improving its food composition. The study is therefore based on the determination of physical parameters such as electrical conductivity and acidity. The instrumentation and apparatuses used in the work are conductometry and titration apparatuses. Honey samples obtained from different areas with respect to Tepi town have been analyzed and the result obtained is on the basis of conductometry and acidity measurement. Hence 20g of each anhydrous honey sample was weighed and dissolved in 100mL of deionized water in order to prepare 20 %( w/v) solution to measure conductivity. The acidity is detected after 10g of each honey sample is dissolved in 75mL of deionized water. The conductivity in summer honey determined to be 0.097mS/cm, 0.153mS/cm 0.117mS/cm and 0.337mS/cm in Korcha, Mexi, Sheko and Gobito respectively. Acidity is found to be 17, 28.67, 29 and 25miliequi/Kg. The conductivity in winter honey is detected to be 0.123, 0.186, 0.103 and 0.246mS/cm. The acidity in winter honey is 3.36-4.26 and 18.3-25.3meq/Kg from pH meter and titration respectively. The conductivity of darker honey is slightly greater than lighter honey, which indicated that the darker honey has more mineral content; and acidity of three honey samples is almost similar. The honey products are safe and fit the international honey commission standard and probably both darker and lighter honey are nutritionally important.
Some physiochemical properties of Acacia honey from different altitudes of the Asir Region in Southern Saudi Arabia
Ahamed Mohammed M.E., Alfifi A., Aalmudawi A., Y Alfaifi M., I Elbehairi S.E., Al-bushnaq H.A. (2017): Some physiochemical properties of Acacia honey from different altitudes of the Asir Region in Southern Saudi Arabia. Czech J. Food Sci., 35: 321–327. The physiochemical properties of six Acacia honey samples taken from three different altitudes in the Asir region were determined. The means of all the studied parameters were within the international standards and were comparable to previous studies (0.11 ± 0.08% for ash, 10.93 ± 1.97% for water, 3.56 ± 0.19 for pH, 38.63 ± 17.17 meq/kg for acidity, 659.51 ± 324.98 μS/cm for conductivity, and 1.45 ± 0.02 for specific gravity). Comparison of the mean values of the parameters at the different altitudes revealed gradual increases with increasing altitude, except for ash and specific gravity. Significant differences were seen in ash and water percentages, acidity, and conductivity. While the mean values of the studied physiochemical properties of the Acacia honey samples were within the ranges of international standards, the honey produced at high altitudes exhibited variable physiochemical properties.
Analyse pollinique des miels de l'Ontario, Canada
Résumé &mdash; L’étude a été menée sur 17 miels récoltés pour la plupart en 1983 et provenant du sud de l’Ontario (Canada) où est concentrée l’activité apicole. Les résultats révèlent six taxons caractéristiques des miels de cette région : Lotus comiculatus (lotier comiculé), Trifolium hybridum l T. repens (trèfle hybride / trèfle blanc), Melilotus (mélilot), Salix (saule), Tüfolium pratense (trèfle rouge) et le type Solidago (verge d’or et aster) présents dans plus de 80% des échantillons. La moitié des miels sont unifloraux avec deux types dominants : lofler et trèfle. Un miel de tilleul (Tilia) a été relevé mais sa production paraît sporadique. Les indicateurs de miellat sont réduits. Des caractéristiques locales ont été décelées. composition, from to honeys from the west of of some honeys from the a characteristic component of von Brassicaceen (andere) scheint rein zufällig zu sein. Ein Fall von Lin- denhonig (Tilia), bei dem normalerweise der Pollen unterrepäsentiert ist, konnte nachgewiesen werden. Die Anzahl der Pollenkömem pro 10 g Honig bestätigte diese Unterrepräsenderung (Tab. V). sehr Lotus und hybridum repens, fal- Melilotus die Klasse des Begleitpollens (Tab. Trifolium pratense, die Obstbäume, Rubus, Rhus typhina und die Rosaceen (gefaltet) sind in der Klasse von wichtigen Einzelpollen (1-15%) zu finden.