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Medicinal plants

About: Medicinal plants is a research topic. Over the lifetime, 3816 publications have been published within this topic receiving 108681 citations. The topic is also known as: medicinal herbs & medicinal plants.


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Journal ArticleDOI
TL;DR: Preliminary phytochemical screening revealed the presence of flavonoids, tannins, alkaloids, glucosides, saponins and steroids/terpenes and other glycosides with very strong antibacterial activity and validates the ethno-medical use in the treatment of bacterial skin diseases and other forms of bacterial infections.
Abstract: The antibacterial activity of the n-hexane, acetone/dichloromethane, ethanol and aqueous extracts of twelve common medicinal plants from the Philippines obtained through pounding and solvent extraction was evaluated using disc Agar diffusion. The microorganisms tested were: Staphylococcus aureus, Bacillus subtilis, Escherichia coli, and Pseudomonas aeruginosa. Susceptibility test results showed that different extracts (1000 mcg/disc) from ten plants inhibited growth with a mean zone of inhibition range of 15 to 30 mm against S. aureus, E. coii, and P. aeruginosa. The common medicinal plants which showed highly positive activity were Psidium guajava (guava), Eucalyptus globulus, Mangifera indica(Indian mango), Nasturtium officinale (Watercress), Pterygospermum oleiferum (Moringa),Carmona retusa (Wild tea), Citrus aurantifolia (Lemon), Citrus sinensis (Orange), Allium sativum (garlic), and Allium cepa (onion). Preliminary phytochemical screening revealed the presence of flavonoids, tannins, alkaloids, glucosides, saponins and steroids/terpenes. The results suggest that the different plant extracts contain bioactive constituent(s) particularly tannins, flavonoids, terpenoids and other glycosides with very strong antibacterial activity and validates the ethno-medical use in the treatment of bacterial skin diseases and other forms of bacterial infections. However, many reputed plant antibacterials have very variable activities depending on certain conditions. Key words: Antibacterial, medicinal plants from the Philippines, n-hexane, acetone/dichloromethane, ethanol, aqueous extracts, Psidium guajava, preliminary phytochemical screening.

55 citations

Journal Article
TL;DR: Four of the seven tested medicinal plants exhibited antimicrobial activity against Vibrio cholerae, and Terminalia avicennoides showed higher antimocrobial activity than others.
Abstract: Four of the seven tested medicinal plants exhibited antimicrobial activity against Vibrio cholerae. These 7 plants are: Ficus capensis, Mitragyna stipulosa, Entada africana, Piliostigma reticulatum, Terminalia avicennoides, Mimosa pudica, and Lannea acida. Of them Terminalia avicennoides showed higher antimocrobial activity than others. Potentials of these herbs in the control of cholera need to be determined.

55 citations

Journal ArticleDOI
TL;DR: The results concluded that secondary metabolite from Alternaria sp.
Abstract: Medicinal plants have been used as an alternative medicine to promote human health and longevity in many regions of the world since ancient times. In recent years, many novel secondary metabolites ...

55 citations

Journal Article
TL;DR: The results suggest medicinal Thai plants as valuable sources of antioxidants, which may have a potential anti-carcinogenic activity.
Abstract: Herbs have been used for medicinal purposes for centuries and known to possess antioxidant properties that may help to reduce the risk of chronic diseases, cardiovascular disease, and cancer. We screen aqueous extracts from 20 medicinal plants in Thailand that were believed to possess anti-tumor activity, help immune-stimulating property and maintain blood stasis. The antioxidant activities were investigated in two bioassays. Firstly, we demonstrated inhibition of Heinz bodies induction caused by oxidants under in vitro condition. The percentages of Heinz body inhibition activity in plant extracts from Terminalia citrina, Cassia timoriensis, and Derris elliptica were the highest followed by Anamirta cocculus, and Oroxylum indicum respectively. In addition, we investigated total antioxidant activity in plant extracts by improved ABTS radical cation decolorization assay. The total antioxidant activity of the extract from Terminalia citrina was also the highest activity followed by Ficus pubigera, Derris elliptica, Anamirta cocculus, Caesalpinia sappan, and Oroxylum indicum respectively. Our results suggest medicinal Thai plants as valuable sources of antioxidants, which may have a potential anti-carcinogenic activity.

54 citations

01 Jan 2013
TL;DR: Results showed that saponins, tannins, steroids, terpenoids and flavonoids are present in all the eight herbs investigated, confirming their potential as medicinal plants.
Abstract: 2 Abstract: Medicinal plants are an important source of phytochemicals that offer traditional medicinal treatment of various ailments. In Kisii region, southwest Kenya, amongst the indigenous herbs used as phytomedicines for the treatment of diabetes, malaria and pneumonia are Carissa spinarum, Urtica dioica, Warburgia ugandensis, Senna didymobotrya, Physalis Peruvian, Bidens pilosa, Leonotis nepetifolia and Toddalia asiatica. A study was carried out on these plants in the year 2011 to 2012. The objective was to test for the presence of phytochemical compounds in the eight selected traditional medicinal herbs. Leaf samples of the selected herbs growing in the ecological conditions of the Kisii region were collected, washed, air-dried and milled. The samples were extracted with one solvent namely water. The aqueous portion of the extract was used for phytochemical analysis to determine the presence of bioactive compounds. Results showed that saponins, tannins, steroids, terpenoids and flavonoids are present in all the eight herbs investigated. Herbs with cardiac glycoside in their leaves are Carissa spinarum, Senna didymobotrya, Physalis peruviana, Bidens pilosa and Leonotis nepetifolia while those without are Urtica dioica, Warburgia ugandensis and Toddalia asiatica. Plants with alkaloids are Warburgia ugandensis and Physalis peruviana. The anthraquinones are present in Carissa spinarum and Bidens pilosa. The presence of pytochemicals in the herbs confirms their potential as medicinal plants. The herbs vary in their phytochemical constituents hence potential as medicinal plants.

54 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
2023617
20221,438
2021239
2020262
2019227
2018252