Treatment of Jojoba and Jatropha Seeds Hulls Wastes and Production of New Value Added Products (original) (raw)
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Primary Assessment of the Biological Activity of Jojoba Hull Extracts
2012
To our Knowledge no work up to the present moment has been reported in the literature on the phenolic extracts of jojoba hull. Thus the aim of the present work was to add value to this waste product by investigating the potentiality of different jojoba hull extracts as neutraceuticals. The efficiency of methanol, ethanol, acetone, isopropanol and ethyl acetate at concentrations of 100, 80, 70, 60, and 50% to extract phenolic compounds were investigated. Results revealed that 60% acetone extracted optimum phenolic compounds (13.9 mg/g hulls). Extraction at room temperature yielded more phenolic compounds than extraction at 45ᴼC. On the other hand, 70% methanol extract of jojoba hulls exhibited the highest AOA (95.33%). The 70% methanol extract was added to a butter cake at 100 and 200 ppm as well as 200 ppm BHT. The cake was stored at room temperature and the butter analyzed every week for acid, iodine and peroxide values. Results proved that the addition of methanol extract delayed ...
The Scientific World Journal
The aim of this study is to investigate in vitro antioxidant and antibacterial activities of the aqueous and hydroethanolic extracts for aerial parts of Herniaria hirsuta. Extracts were screened for their possible antioxidant activities by three tests: DPPH free radical-scavenging, reducing power, and molybdenum systems. The screening of antibacterial activity of extracts was individually evaluated against sixteen bacteria species using a disc diffusion method. Flavonoids, total phenols, and tannins content were performed for both extracts. It shows higher content in the hydroethanolic extract. The hydroethanolic extract showed a significant antioxidant activity for the three methods studies to the aqueous extract, but nonsignificant results compared to the reference (BHT). However, both extracts have negative effect on the strains studies for the antibacterial activity.
Journal of Evidence-Based Integrative Medicine
Objective. To evaluate the phytochemical content and antioxidant potential of the acetone, aqueous, and methanol extracts of the fruit, leaf, and root of Cucumis africanus L.f. Methods. Total phenolic, flavonoid, and proanthocyanidin contents were evaluated using spectrophotometric methods. The free radical scavenging activity of the acetone, methanol, and aqueous extracts of the fruit, leaf, and root were evaluated against DPPH+, ABTS+, and phosphomolybdenum. Alkaloid and saponin contents were also determined. Results. The acetone extract of the fruit revealed the highest polyphenol content when compared with the other solvent extracts analyzed. Total phenol content of the parts tested ranged from 3.66 ± 0.17 to 44.98 ± 3.41, flavonoid content ranged from 4.63 ± 3.33 to 401.33 ± 7.89, and proanthocyanidin content ranged from 8.84 ± 2.65 to 504 ± 36.6. Significant amount of alkaloids present was observed in the fruits, leaf, and root (10.68 ± 0.68, 14.12 ± 1.67, and 12.15 ± 4.74), r...