scholarly journals Chemical composition and antibacterial action of Stryphnodendron pulcherrimum bark extract, “barbatimão” species: evaluation of its use as a topical agent

2021 ◽  
pp. 103183
Author(s):  
Paulo W.P. Gomes ◽  
Thaiana C.D.L. Pamplona ◽  
Kely C. Navegantes-Lima ◽  
Lucas B.G. Quadros ◽  
Ana L.B. Oliveira ◽  
...  
2020 ◽  
Vol 49 (3) ◽  
pp. 531-540
Author(s):  
Heng Liang ◽  
Qian Wang ◽  
Chunbang Ding ◽  
Li Zhang ◽  
Ruiwu Yang

Chemical composition, antioxidant and antibacterial activities of the essential oil of Curcuma phaeocaulis were analysed. In the aerial part, 22 compounds account for 69.23% of the total essential oil and authenticated, while in the underground part, 32 compounds account for 84.28% of the total essential oil and authenticated. Among the compounds detected, α-pinene, camphene, eucalyptol, camphor, borneol, β- tumerone, epi-curzerenone were the main compounds of volatile oil in both parts of Curcuma phaeocaulis. In addition, various lipid antioxidant properties by peroxidation assays, inoxidizability and antibacterial action were assessed. The result may be considered as a baseline study for the further development and application of Curcuma phaeocaulis.


2014 ◽  
Vol 52 ◽  
pp. 23-28 ◽  
Author(s):  
Eva Tavčar Benković ◽  
Tina Grohar ◽  
Dušan Žigon ◽  
Urban Švajger ◽  
Damjan Janeš ◽  
...  

2012 ◽  
Vol 83 ◽  
pp. 153-167 ◽  
Author(s):  
Pieter B. Venter ◽  
Nadine D. Senekal ◽  
Gabré Kemp ◽  
Maryam Amra-Jordaan ◽  
Pir Khan ◽  
...  

2015 ◽  
Vol 18 (2) ◽  
Author(s):  
Siluh Putu Sri Dia ◽  
N. Nurjanah ◽  
Agoes Mardiono Jacoeb

<p>Plants lindur (Bruguiera gymnorrhiza) is one of the plants that have a potential as<br />a source of bioactive compounds for the antioxidant. This study aimed to determine the<br />chemical composition, bioactive compound and determine antioxidant activity of leaves,<br />bark and roots of plants lindur (B. gymnorrhiza). This research was conducted through<br />several stages proximate test, stratified extraction, phytochemical test, and antioxidant<br />activity test with DPPH. The highest yield value resulting by ethanol extract of the leaves<br />is 12,85 % and the lowest was produced by n-hexane root extract that is 0,18 %. The leaves<br />contain high levels of protein, fat, and water which is the higher of the two parts from the<br />other samples. Bark containing ash content (4,12%) and carbohydrates (46,02%). Root has<br />the highest levels of carbohydrates that is 25,91 %. Bioactive components were detected on<br />ethanol and ethyl acetate extracts of the leaves are flavonoids, tannins, phenols, saponins,<br />steroids and tritepenoid. Bark extract ethanol, ethyl acetate and ethanol root bark has<br />bioactive components there are flavonoids, tannins, phenols, saponins, and tritepenoid. </p><p>Ethyl acetate extract of the roots only have bioactive components there are flavonoids,<br />phenols, saponins, and triterpenoids. The potential antioxidant activity produced from<br />ethyl acetate extracts of bark lindur with IC50 values is 14,21 ppm.<br />Keywords: Antioxidants, phytochemicals, roots, ethanol, Bruguiera gymnorrhiza</p>


1962 ◽  
Vol 14 ◽  
pp. 149-155 ◽  
Author(s):  
E. L. Ruskol

The difference between average densities of the Moon and Earth was interpreted in the preceding report by Professor H. Urey as indicating a difference in their chemical composition. Therefore, Urey assumes the Moon's formation to have taken place far away from the Earth, under conditions differing substantially from the conditions of Earth's formation. In such a case, the Earth should have captured the Moon. As is admitted by Professor Urey himself, such a capture is a very improbable event. In addition, an assumption that the “lunar” dimensions were representative of protoplanetary bodies in the entire solar system encounters great difficulties.


1976 ◽  
Vol 32 ◽  
pp. 343-349
Author(s):  
Yu.V. Glagolevsky ◽  
K.I. Kozlova ◽  
V.S. Lebedev ◽  
N.S. Polosukhina

SummaryThe magnetic variable star 21 Per has been studied from 4 and 8 Å/mm spectra obtained with the 2.6 - meter reflector of the Crimean Astrophysical Observatory. Spectral line intensities (Wλ) and radial velocities (Vr) have been measured.


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