Abstract
Humic substances (HS) comprising one of the largest reservoirs of carbon in nature may originate from different sources. For example, they can be formed as final products of biosynthetic pathways in micro-organisms, degradation and transformation products in plants, synthetic oxidation products of phenolic compounds and as polymers resulting from roasting processes, e.g. coffee roasting. Suprisingly, besides their brown color, which is responsible for the high UV absorption of HS, polymers of the HS type have several features in common that enable them to interact with other biopolymers as well as with low-molecular weight organic and inorganic compounds and, in particular with metals, thus chelate complexes. fractal structures, neighboring carboxyl and hydroxyl groups, reduction-oxdation and association-dissociation potentials are some of most important biogeochemical component of the Earth's surface. Besides their traditional use as fuel and organic fertilizers, HS are substrates for medical preparations, and also starting materials in the synthesis of specialized industrial products.
Keyword : Medical Aspects, Humic substances, medical aplications
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