Results 61 to 70 of about 94,849 (289)

Coumarin derivatives ameliorate the intestinal inflammation and pathogenic gut microbiome changes in the model of infectious colitis through antibacterial activity

open access: yesFrontiers in Cellular and Infection Microbiology
Coumarin, a phenolic compound, is a secondary metabolite produced by plants such as Tanga and Lime. Coumarin derivatives were prepared via Pechmann condensation.
Hui-su Jung   +8 more
doaj   +1 more source

Modifier-Enhanced Supercritical CO2 Extraction with GRAS Solvents of Coumarin from Cumaru Seeds (Dipteryx Odorata)

open access: yesChemical Engineering Transactions, 2017
Cumaru seeds (Dipteryx odorata) are commercialized as flavoring in cigarettes, chocolate, perfumes, cosmetics and naturopathy. Dipteryx odorata is the specie that has the highest content of the coumarin compound in the Dipteryx family.
J. Lima   +5 more
doaj   +1 more source

New natural deep eutectic solvents based on aromatic organic acids

open access: yesGreen Chemistry Letters and Reviews, 2021
It is imminent to explore new types of starting materials for natural deep eutectic solvents (NADESs). Herein, a series of natural aromatic organic acids as the hydrogen bond donor (HBD) and coumarin as the model hydrogen bond acceptor (HBA) were used to
Yuhang Shan   +4 more
doaj   +1 more source

HYDROGEN-BONDED SUPRAMOLECULAR ARRAY IN THE CRYSTAL STRUCTURE OF ETHYL 7-HYDROXY-2-OXO-2H-CHROMENE-3-CARBOXYLATE MONOHYDRATE [PDF]

open access: yes, 2010
Indexación: Web of Science; ScieloThe crystal structure of ethyl 7-hydroxy-2-oxo-2H-chromene-3-carboxylate monohydrate (1), C12H10O5.H2O, was established by X-ray crystallographic analysis.
CASSELS, BRUCE K.   +2 more
core   +2 more sources

One‐Step Glycoengineering of NK Cells With High‐Affinity Siglec Ligands for Cancer Immunotherapy

open access: yesAdvanced Science, EarlyView.
This study develops an engineered NmCSS enzyme with improved activity for bulky group modified sialic acids, enabling efficient synthesis of structurally diverse sialoside analogs in a single step. Glycan microarray screening identified Siglec high‐affinity ligands, which were incorporated onto natural killer (NK) cells via a one‐pot enzymatic system ...
Shuai Hu   +8 more
wiley   +1 more source

Microwave Assisted Heterocyclization: A Rapid and Efficient Synthesis and Antibacterial Activity of Novel Thiazolidinones

open access: yesE-Journal of Chemistry, 2004
As a target to synthesize various Thiazolidinone derivatives, 2-Amino-4-(coumarin-3-yl)-thiazole has been prepared by the reactions of 3-Bromo acetyl coumarin with thiourea. 3-Bromo acetyl coumarin was prepared from 3-Acetyl coumarin.
B. D. Naik, K. R. Desai
doaj   +1 more source

Influence of Polarity of Solvents on the Spectral Properties of Bichromophoric Coumarins

open access: yesMolecules, 2010
Absorption and fluorescence spectra of bichromophoric coumarins were investigated in different solvents and in polymer matrices. These bichromophoric coumarins were composed of a coumarin dimethylamino-substituted at position 7 or unsubstituted coumarin ...
Henrieta Stankovicova   +3 more
doaj   +1 more source

Asymmetrical hybridization and gene flow between Eisenia andrei and E. fetida lumbricid earthworms [PDF]

open access: yes, 2018
Uniformly pigmented Eisenia andrei (Ea) and striped E. fetida (Ef) lumbricid earthworms are hermaphrodites capable of self-fertilization, cross-fertilization, and asymmetrical hybridization.
Bigaj, Janusz   +3 more
core   +1 more source

Tetrahedral DNA Nanostructure‐Based Biomimetic Nanovesicles Attenuate Sepsis‐Associated ARDS by Suppressing Glycolysis via the BMAL1/PFKFB3 Axis

open access: yesAdvanced Science, EarlyView.
Upon inhalation, RM@TNT could persist long‐term in the diseased lungs, while undergoing disintegration to release TNT specifically within the ROS‐rich pathological microenvironments of SA‐ARDS. The released TNT was then precisely delivered to AMs via Tuftsin, where it released Nob intracellularly to activate BMAL1 expression, thus inhibiting AM ...
Yunlong Zhang   +23 more
wiley   +1 more source

Fourier transform infrared spectroscopy for irradiation coumarin doped polystyrene polymer films by alpha ray

open access: yesJournal of Radiation Research and Applied Sciences, 2016
FTIR spectroscopy has been in use broadly to study microscopic areas in polymers for the last years. The FTIR transmission spectra of coumarin laser dye, polystyrene and coumarin doped polystyrene films with different doping ratio of coumarin solution ...
Mahasin F. Hadi Al-Kadhemy   +2 more
doaj   +1 more source

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