Aspectos Químicos e Atividade Antibacteriana de <i>Piptadeniagonoacantha</i> (fabaceae)
DOI:
https://doi.org/10.5902/2179460X13456Keywords:
Piptadeniagonoacantha, plantas medicinais, antibacteriano, fitoquímica.Abstract
Este trabalho teve o objetivo de avaliar os aspectos fitoquímicos e antibacteriano de Piptadeniagonoacantha. Primeiramente, realizou-se uma padronização dos extratos das folhas de P. gonoacantha e sua caracterização fitoquímica foi analisada, onde as principaisvariáveis avaliadas foram: método de extração (maceração e banho de ultrassom), solvente (água, álcool e misturas hidroalcoólicas), temperatura de extração (30, 40 e 50°C) e influência do pH (2 a 12) sobre o coeficiente de extinção (absorbância) das mesmas. Além disto, foi realizada uma prospecção fitoquímica e a quantificação de polifenóis totais na amostra. Umaavaliação da atividade antibacteriana in vitro foi realizada através da adaptação do método de difusão em meio sólido com perfuração do ágar frente a Staphylococcus aureus e Escherichia coli. Por meio da avaliação química identificou-se a maneira mais eficiente de promover a extração dos seus constituintes devendo esta ser realizada por ultrassom, a 40°C, utilizando etanol 80% (v/v). O pH, promoveu modificações estruturais (deprotonação/protonação) dos constituintes químicos em extratos com valores de pH acima de 8. Além disso, a quantificação de fenóis totais indicou que grande proporção dos extratos é constituída por compostos incluídos nesta classe, sendo confirmada pela prospecção fitoquímica onde pôde ser evidenciada a presença de flavonóides, taninos, cumarinas e antraquinonas. O extrato desta espécie apresentou atividade antibacteriana, especialmente com etanol 80% (v/v), tendo eficiente capacidade de inibir o crescimento da bactéria S. aureus. Os dados obtidos sugerem que a espécie P. gonoacantha possui compostos promissores como fonte para obtenção de novos medicamentos no combate a microrganismos resistentes.
Downloads
Downloads
Published
How to Cite
Issue
Section
License
To access the DECLARATION AND TRANSFER OF COPYRIGHT AUTHOR’S DECLARATION AND COPYRIGHT LICENSE click here.
Ethical Guidelines for Journal Publication
The Ciência e Natura journal is committed to ensuring ethics in publication and quality of articles.
Conformance to standards of ethical behavior is therefore expected of all parties involved: Authors, Editors, Reviewers, and the Publisher.
In particular,
Authors: Authors should present an objective discussion of the significance of research work as well as sufficient detail and references to permit others to replicate the experiments. Fraudulent or knowingly inaccurate statements constitute unethical behavior and are unacceptable. Review Articles should also be objective, comprehensive, and accurate accounts of the state of the art. The Authors should ensure that their work is entirely original works, and if the work and/or words of others have been used, this has been appropriately acknowledged. Plagiarism in all its forms constitutes unethical publishing behavior and is unacceptable. Submitting the same manuscript to more than one journal concurrently constitutes unethical publishing behavior and is unacceptable. Authors should not submit articles describing essentially the same research to more than one journal. The corresponding Author should ensure that there is a full consensus of all Co-authors in approving the final version of the paper and its submission for publication.
Editors: Editors should evaluate manuscripts exclusively on the basis of their academic merit. An Editor must not use unpublished information in the editor's own research without the express written consent of the Author. Editors should take reasonable responsive measures when ethical complaints have been presented concerning a submitted manuscript or published paper.
Reviewers: Any manuscripts received for review must be treated as confidential documents. Privileged information or ideas obtained through peer review must be kept confidential and not used for personal advantage. Reviewers should be conducted objectively, and observations should be formulated clearly with supporting arguments, so that Authors can use them for improving the paper. Any selected Reviewer who feels unqualified to review the research reported in a manuscript or knows that its prompt review will be impossible should notify the Editor and excuse himself from the review process. Reviewers should not consider manuscripts in which they have conflicts of interest resulting from competitive, collaborative, or other relationships or connections with any of the authors, companies, or institutions connected to the papers.
