Results 51 to 60 of about 1,918 (162)

Chemistry and Antiviral Activity of Arrabidaea pulchra (Bignoniaceae)

open access: yesMolecules, 2013
The aim of the present work was to carry out a bioguided isolation of antiviral chemical constituents from an ethanol extract of leaves from Arrabidaea pulchra (Cham.) Sandwith (EEAPL) that had shown in vitro activity in a previous screening using DNA ...
José D. Souza Filho   +4 more
doaj   +1 more source

Inhibitory activity of Kaki calyx extracts and their triterpene compounds on recombinant hepatitis C virus NS3/4A protease [PDF]

open access: yes, 2018
柿蔕のヘキサン、メタノール、50 % アセトン抽出物の、組み替えhepatitis C virus (HCV)の NS3/4A 蛋白質分解酵素に対する阻害活性を検討した。50 % アセトン抽出物が最も阻害活性が強く、この抽出物をSephadex LH20カラムで分画を行なった。得た各画分のうち阻害活性の強かった70 %メタノール画分を、さらにシリカゲルカラム/薄層クロマトグラフィーで分画し、トリテルペンのベルリン酸、オレアノール酸、ウルソール酸を分離した。これらのトリテルペンはpolycyclic ...
Isao OHTSUKA   +14 more
core   +1 more source

Targeting Staphylococcus aureus Biofilms Through Aurisin Derivatives From Neonothopanus nambi of African Origin

open access: yesChemistry &Biodiversity, Volume 23, Issue 2, February 2026.
This study describes the isolation and characterization of potent bioactive compounds from the fungal strain Neonothopanus nambi, followed by structural elucidation. The compounds shown are dimeric aristolane‐type sesquiterpenoids, identified as aurisins D (1) and B (2).
Syeda J. Khalid   +8 more
wiley   +1 more source

Flavonoids from the leaves of Iranian Linden; Tilia rubra subsp. caucasica [PDF]

open access: yesResearch Journal of Pharmacognosy, 2015
Background and objectives: Plants belonging to the genus Tilia L. (Tiliaceae) are often tall beautiful trees which are considered for various medicinal potentials of their flowers and leaves.
M.R. Delnavazi, M. Shahabi, N. Yassa
doaj  

Isolamento, identificação e caracterização das substâncias de Rapanea guianensis Aubl. (Myrsinaceae) e Diospyros hispida A. DC. (Ebenaceae) inibidoras de células de câncer [PDF]

open access: yes, 2017
Dissertação (mestrado)—Universidade de Brasília, Faculdade de Medicina, Programa de Pós-Graduação em Ciências Médicas, 2017.Texto parcialmente liberado pelo autor.
Dusi, Renata Garcia
core  

Flavonoid Constituents in Some Species of Salvia L. (Lamiaceae) in Iran [PDF]

open access: yesJournal of Sciences, Islamic Republic of Iran, 2014
Eight Salvia L. species including S. spinosa L., S. reuterana Boiss., S. macrosiphon Boiss., S. syriaca L., S. nemorosa L., S. virgata Jacq., S. sharifii Rech. f. & Esfand. and S. mirzayanii Rech. f. & Esfand. were studied for flavonoid compounds.
N. Kharazian
doaj  

Use of genotoxicity tests to characterization of some natural substances and particles [PDF]

open access: yes, 2016
Při výrobě léčiv, kosmetických výrobků, v potravinářství i jiných biotechnologiích patří testování genotoxicity (neboli změny v genetické informaci, které se nedědí) k běžným krokům procesu před uvedením daného produktu na trh.
Tilšarová, Kamila
core  

CXCR4 chemokine receptor antagonists: nickel(II) complexes of configurationally restricted macrocycles [PDF]

open access: yes, 2012
Tetraazamacrocyclic complexes of transition metals provide useful units for incorporating multiple coordination interactions into a single protein binding molecule.
Archibald, Stephen J.   +11 more
core   +1 more source

Transition Metal Complexes with Appended Benzimidazole Groups for Sensing Dihydrogenphosphate

open access: yesChemistry – A European Journal, Volume 30, Issue 52, September 16, 2024.
The anion recognition behaviour of several emissive metal complexes, with appended benzimidazole groups, is discussed. These show a selective response to both acetate and dihydrogen phosphate: with acetate these complexes appear to adopt a simple one to one adduct, but with dihydrogenphosphate several binding modes are evident dependant on the steric ...
Chloe L. Howells   +5 more
wiley   +1 more source

New Caffeic Acid Esters from Plazia daphnoides [PDF]

open access: yes, 2003
Two new 3,4 dihydroxycinnamic acid esters have been isolated from Plazia daphnoides.
Alarcón, Julio   +6 more
core   +1 more source

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