Some floral pigments (including antioxidants); carotenoids, chlorophylls, anthocyanins and xanthophylls were determined colorimetrically in some honeybee, Apis mellifera L., products; citrus, clover and cotton honeys, three types of beeswax; white, brown and dark and propolis; brown, dark brown and dark. Two solvents (acetone or ethanol) were used for extraction and determination of pigments at...

We conducted a long-term investigation to ascertain effects on honey bee, Apis mellifera L., colonies during and after exposure to flowering canola, Brassica napus variety Hyola 420, grown from clothianidin-treated seed. Colonies were placed in the middle of 1-ha clothianidin seed-treated or control canola fields for 3 wk during bloom, and thereafter they were moved to a fall apiary. There were...

Pollinator services and the development of beekeeping as a poverty alleviating tool have gained considerable focus in recent years in sub-Saharan Africa. An improved understanding of the pervasive environmental extent of agro-chemical contaminants is critical to the success of beekeeping development and the production of clean hive products. This study developed and validated a multi-residue me...

Africa is blessed with numerous types of wild honeybees [1]. Ethiopia is one of the countries in the continent which possess huge honey production potential. Owing to its varied ecological and climatic conditions, Ethiopia is the home of diverse flora and fauna in Africa. In Ethiopia, ancient tradition for beekeeping is stretched back into the millennia of the country’s early history which crea...

To better detect and identify beeswax in ancient organic residues from archaeological remains, we developed a new analytical methodology consisting of the analysis of (i) the trimethylsilylated organic extract by GC/MS and (ii) the crude extract by ESI-MS. Selective scanning modes, such as SIM or MRM, permit separate quantification of each chemical family (fatty acids, monoesters, monohydroxyes...

Fullerene nanoemulsions were formulated in palm kernel oil esters stabilized by low amount of mixed nonionic surfactants. Pseudoternary phase diagrams were established in the colloidal system of PKOEs/Tween 80 : Span 80/water incorporated with fullerene as antioxidant. Preformulation was subjected to combination of high and low energy emulsification methods and the physicochemical characteristi...

The industry demands high quality and standards-compliant beeswax, which is difficult to find in western countries. As a result, it necessary explore new geographical sources. This work focuses on the characterization of beeswax from Mozambique terms saturated hydrocarbon profile thermal properties comparing them with others diverse origins. hydrocarbons found (C21H44-C35H72) do not contain eno...

Buildings with lightweight concrete are currently used as a solution for mass housing construction which is relatively cheaper, although it does not provide indoor thermal comfort due to the use of this building material. Lightweight materials able store heat long time, so that at night released indoors. The combination and PCM an efficient way increase storage capacity energy in components. pu...