Plan and Methodology: This study evaluated antioxidant activity of Cedrela odorata stems extracts and also investigated the bioactive phytoconstituents in the bio-active extract. N-hexane, dichloromethane (DCM), ethyl acetate and methanol 80% extract were tested for free radical scavenging activity on model reaction with stable 2,2-diphenyl-1-picrylhydrazyl radical (DPPH). Outcome: The results ...

Twenty-one propolis samples produced by 12 different Meliponinae species were analyzed by GC-MS. Several chemical types of stingless bees' propolis could be grouped, according to the prevailing type of compounds like: 'gallic acid", "diterpenic" and "triterpenic" types. The results confirm that neither the bee species nor the geographical location determine the chemical composition of Meliponin...

A set of PEGylated derivatives of oleanolic and maslinic acids has been semi-synthesised, attaching ethylene glycol, diethylene glycol, triethylene glycol or tetraethylene glycol to the C-28 carboxyl group of these natural triterpenes and some derivatives. Another set of PEGylated derivatives has been semi-synthesised by connecting the same four ethylene glycols to the hydroxyl groups of the A ...

Abstract A critical overview of the separation three relevant triterpenic acids, namely betulinic, oleanolic, and ursolic by liquid supercritical fluid chromatography is presented in this review. These acids are commonly found different biomass residues have raised great research attention recent years due to their broad valuable therapeutic properties. Accordingly, fundamental aspects such as ...

BACKGROUND Osteosarcoma is the most common bone tumor and is associated with a poor prognosis. Conventional therapies, surgery and chemotherapy, are still the standard but soon reach their limits. New therapeutic approaches are therefore needed. Conventional aqueous mistletoe extracts from the European mistletoe (Viscum album L.) are used in complementary cancer treatment. These commercial extr...

Among the many different types of table olives, production dehydrated black olives is rather low worldwide, although there an increasing interest in them from consumers. The physicochemical and microbiological characterization 20 samples these obtained countries processing methods was studied. average pH water activity (a w ) values were 4.7 units 0.85 respectively, a great variability found am...