Search results for "Active principle"
showing 4 items of 4 documents
Bryophytes: a powerful source of biologically active compounds
2015
Bryophytes are generally considered the first plants appeared on the Earth. Taxonomically, they are placed between Algae and Pteridophytes. The medicinal traditional use of bryophytes has been documented for a long time in many countries. Bryophytes contain numerous potentially useful compounds and strong antioxidative enzymatic machinery, which help them to cope up with extreme climates and stresses, and, in several cases, the total antioxidant amount was found higher than in other antioxidant common sources even if not yet fully known. Thus, a positive correlation between the folklore use and the scientific evaluation could generate an alternative source of novel medicinal compounds, whic…
Antioxidant Bibenzyl Derivatives from Notholaena nivea Desv.
2011
Four new bibenzyl derivatives were isolated, together with other known bibenzyls, by bioassay-guided fractionation of a CHCl3-MeOH extract of Notholaena nivea Desv. (Pteridaceae) aerial parts. The structures were elucidated by NMR, ESIMS and other spectral analyses. Their antioxidative effects towards superoxide, lipidic peroxidation and the 2,2'- azino-bis-3- ethilbenzothiazoline-6-sulfonic acid (ABTS) radical were assayed. Results showed that the compound 3,12-dihydroxy-5-methoxybibenzyl (6) is the most active compound in the ABTS free-radical scavenging test, while in the coupled oxidation of ȕ-carotene and linoleic acid assay the compound 5,12-dihydroxy-3-methoxydibenzyl-6- carboxylic a…
Pharmacological Properties of Shikonin – A Review of Literature since 2002
2013
The naphthoquinone shikonin is the main active principle of Zicao, a traditional Chinese herbal medicine made from the dried root of Lithospermum erythrorhizon. Studies carried out over the past 30 years have provided a scientific basis for the use of Zicao which has been long employed in folk medicine to treat a variety of inflammatory and infectious diseases. In particular, shikonin has been shown to possess many diverse properties, including antioxidant, anti-inflammatory, antithrombotic, antimicrobial, and wound healing effects. The fact that shikonin shows so many beneficial properties has increased the interest in this molecule dramatically, especially in the past few years. The aim o…
Risks Associated with the Use of Garcinia as a Nutritional Complement to Lose Weight
2021
Nowadays, obesity is one of the great nutritional problems facing public health. The prevalence of this pathology has increased in a worrying way over recent years, currently reaching epidemic proportions. In this context, nutritional supplements are presented as a therapeutic alternative to which more and more people are turning to. Nutritional supplements to lose weight based on the Garcinia plant, specifically on Garcinia cambogia, are commonly used. The active principle of this plant to which these properties have been attributed, is hydroxycitric acid (HCA). The aim of the present review is to gather reported data concerning the effectiveness of nutritional supplements based on Garcini…