ALSTONIA BOONEI PDF

Kumai and M. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. This article has been cited by other articles in PMC. Within West Africa, it is considered as sacred in some forest communities; consequently the plant parts are not eaten.

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Free radical scavenging IC50 values of the fractions, compound 1, and ascorbic acid. Figure 1 Free radical scavenging activity of crude precipitate, fractions, and compound 1 in comparison with ascorbic acid. Discussion Several literature reports show that reduction in oxidative damage to DNA, proteins, and lipids enhances longevity and health span [ 11 , 12 ]. Phytochemical analysis of the crude precipitate, fractions, and compound from the methanol root-bark extract of A.

The presence of these phytocompounds may have contributed to the antioxidant activity exhibited by the fractions, precipitate, and isolated compound.

DPPH method for evaluation of antioxidant properties of compounds and plant extracts is quick, reliable, and highly reproducible [ 20 ]. The inhibition of DPPH radical exhibited by the ethyl acetate, acetone, and methanol fractions could be explained by the presence of phenolic compounds in these fractions.

The best-described property of most phenolic compounds is their capacity to act as antioxidants [ 21 ]. Phenolic compounds are known to concentrate in ethyl acetate fractions [ 22 ] and might have accounted for the high antioxidant activity exhibited by this fraction compared with other fractions, precipitate, and isolated compound. Steroids have good antioxidant activity acting mainly through membrane stabilization [ 24 ]; however, their poor solubility in polar reaction medium may hinder free interaction with DPPH radical in methanol solution.

This may have contributed to the decreased DPPH inhibition exhibited by the crude precipitate and isolated compound. Conclusion The establishment of the presence of antioxidant effect in the root-bark extracts of A. Structure elucidation of compound 1 and the isolation and structure elucidation of the phenolic compounds present in ethyl acetate and acetone fractions are currently in process in our laboratory.

Conflict of Interests The authors declare that there is no conflict of interests regarding the publication of this paper. References R. View at: Google Scholar J. Adotey, G. Adukpo, Y. Boahen, and F. View at: Google Scholar G.

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Van Hoorn, P. Boelens, K. Van Norren, and P. View at: Google Scholar P. Arumugam, P. Ramamurthy, S. Santhiya, and A. Arulmozhi, P. Mazumder, L. Narayanan, and P. Kavanagh and K. Kam P. This is an open access article distributed under the Creative Commons Attribution License , which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

FDM-1 NOTIFIER PDF

Alstonia Scholaris Herb Uses, Benefits, Cures, Side Effects, Nutrients

Free radical scavenging IC50 values of the fractions, compound 1, and ascorbic acid. Figure 1 Free radical scavenging activity of crude precipitate, fractions, and compound 1 in comparison with ascorbic acid. Discussion Several literature reports show that reduction in oxidative damage to DNA, proteins, and lipids enhances longevity and health span [ 11 , 12 ]. Phytochemical analysis of the crude precipitate, fractions, and compound from the methanol root-bark extract of A. The presence of these phytocompounds may have contributed to the antioxidant activity exhibited by the fractions, precipitate, and isolated compound. DPPH method for evaluation of antioxidant properties of compounds and plant extracts is quick, reliable, and highly reproducible [ 20 ].

ELECTROTERAPIE ANDREI RADULESCU PDF

Alstonia boonei

Description[ edit ] Alstonia consists of about species according to different authors , native to tropical and subtropical Africa , Central America , southeast Asia , Polynesia and Australia , with most species in the Malesian region. These trees can grow very large, such as Alstonia pneumatophora, recorded with a height of 60 m and a diameter of more than 2 m. Alstonia longifolia is the only species growing in Central America mainly shrubs, but also trees 20 m high. The leathery, sessile, simple leaves are elliptical, ovate, linear or lanceolate and wedge-shaped at the base. The leaf blade is dorsiventral, medium-sized to large and disposed oppositely or in a whorl and with entire margin. The leaf venation is pinnate, with numerous veins ending in a marginal vein.

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