Abstract
The present study was planned to investigate the phytochemical compounds present in Aloe vera and antimicrobial and antioxidant activity of Aloe vera gel powder with different solvents. The phytochemical compounds were screened qualitatively and glycosides, flavonoids, tannins, phenols, saponins, proteins, triterpeniods gave positive results while alkaloids and phlobatannin gave negative results. The polyphenol and flavonoid contents and antioxidant activity of Aloe vera gel powder extract using three different solvents (ethanol, methanol, acetone) were analyzed. The ethanolic extract showed maximum polyphenol (28.44 ± 2.67 mg GAE/g), flavonoid (63.90± 2.39 mg CE/g) and DPPH radical scavenging activity (51.09±0.33%). Antibacterial activity of extracts was examined by agar diffusion method with four microbial species (Salmonella typhi, Escherchia coli, Bacillus subtilis and Staphylococcus aureus). Maximum antibacterial activity was observed in ethanol extract of Aloe vera gel powder. Hence, Aloe vera gel powder can be used as an antimicrobial and antioxidant agent in food preservation and to prevent diseases related to oxidative stress. Keywords: Aloe vera gel powder; Antibacterial activity; Antioxidant capacity; Phytochemicals; Solvents; Total polyphenols http://dx.doi.org/10.19045/bspab.2019.80068
Highlights
Aloe vera is derived from the Arabic wordAloe vera has been used in ancient cultures of “Alloeh” which mean bitter substance andIndia, Egypt, Greece, Rome and China for its known as first aid plant or burn plant [1].medicinal value for several thousand years
Screening of phytochemical components The present studies revealed that Aloe vera gel powder contain important phytochemical compounds
Total flavonoid and antioxidant capacity of Aloe vera gel powder Polyphenols are the group of compounds containing phenolic hydroxyl attached to ring structures, due to which they function as antioxidant
Summary
Aloe vera is derived from the Arabic wordAloe vera has been used in ancient cultures of “Alloeh” which mean bitter substance andIndia, Egypt, Greece, Rome and China for its known as first aid plant or burn plant [1].medicinal value for several thousand years. Aloe vera is derived from the Arabic word. Aloe vera has been used in ancient cultures of “Alloeh” which mean bitter substance and. Egypt, Greece, Rome and China for its known as first aid plant or burn plant [1]. It. In the food industry, it has been considered as was known as plant of immortality in biblical an important ingredient in functional foods times by the Egyptians and believed to be and health drinks, beverages and curd [2, 3]. Aloe vera is considered as curative agent inflammatory effect, for radiation injury, to mainly due to presence of transparent and treat gastrointestinal problems, skin diseases soft tissue inside the leaf. The polysaccharides present in Aloe vera extracts In Aloe vera gel, compounds like phenolic antioxidants, glutathione peroxidase activity and superoxide dismutase enzymes are responsible for its antioxidant effects [2]
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