Generally, abstract concepts refer to aspects that point to subjective and introspective characteristics. A concept is considered abstract when it has no direct physical counterpart and refers to properties that emerge from individual experience. The mind is often considered an abstract entity because it is not directly observable in the way a material object is. This has given rise to the...
Recently most interest has been focused on active compounds extracted from natural sources. This is due to the fact that many of these natural products in plants of medicinal value can offer new sources of drugs. The genus Salvia from the Lamiaceae family has numerous different species - about 900 species- which are extensively distributed in various regions of the world. Many Salvia species...