The flavonoids and phenolics were also confirmed as the dominant constituents by the 1H NMR spectra (Fig. 3c). In addition, terpenoids and fatty acid compounds were highlighted by a couple of signals captured by the NMR of the crude sample; their intensities were not as high as the ...
Propolis is a material manufactured by bees and contains beeswax, bee salivary secretions and plant resins. Propolis preparations have been used for millennia by humans in food, cosmetics and medicines due to its antibacterial effects. Within the hive, propolis plays an important role in bees' ...
The major chemicals are derived from two constituents of oil, namely olefins such as ethylene and propylene, and aromatics such as benzene, toluene, and xylene. These raw materials are then broken down into more basic polymers, for example polyethylene, polypropylene, elastomers, asphalts, and ...
13) with great efficiency for the BTX (refers to mixtures of benzene, toluene, and the three xylene isomers) provides the quantitative and qualitative analyses of gas constituents, using the ambient air bubbling via the liquid sample. The LOD of the sensor is equal to 200 ppb (v/v) where...
Higher aliphatic hydrocarbons were also present among major constituents of BP EO: eicosane (2.9%), heneicosane (3.2%), docosane (4.2%) and tricosane (11.6%). The same lower aliphatic aldehydes as in BP HS were found: decanal (1.5%) and nonanal (0.5%). The major ...
In the case of the presence of monoethanolamine or diethanolamine or mixtures thereof or in the case of other alkylolamines having a relatively low boiling point, the polymerization may be carried out under a reflux in order not to lose some of the lower boiling point constituents. Alternatively...
The analysis highlighted that the most abundant constituents of the mummification balms were: fats or oils, beeswax, conifer resin, pitch, mastic resin, castor oil, and bitumen. Balms from animal mummies were not found to be significantly different from the balms from human mummies. Residues from...
as immune enhancement, antimicrobial, antioxidant, analgesic as well as reported anti-tumour effects.1,2 Several research efforts have focused on studying the chemical composition of propolis.3-7 The diverse biological activity probably relates in part to the significant changes in extract constituents....
The release properties of a number of constituents of cigarette smoke condensate in a condensate--beeswax matrix were characterized by an in vitro study. Eighteen compounds that were representative of several classes of condenate components were tested. Equal quantities of condensate and beeswax, mixed...
While many of the novel products of the present invention may best be defined in the form of reaction products, they and particularly some of the more potent constituents thereof can, at least in part, be characterized or described by way of structural formulae. Illustrative examples of such ...