Results 41 to 50 of about 6,249 (189)

Chemical evolution of the colour systems generated by riccionidin A, 3-deoxyanthocyanidins and anthocyanins [PDF]

, 2020
UIDB/50006/2020 MEX/Ref. 288188The kinetics and thermodynamics (in acidic solutions) of the five chemical species reversibly interconnected by external stimuli (a multistate), such as pH and light, generated by the liverworts colorant riccionidin A were ...
Alejo-Armijo, Alfonso, Mendoza, Johan, Parola, A. Jorge, Pina, Fernando   +3 more
core   +1 more source

Stereoselective Ag-Catalyzed 1,3-Dipolar Cycloaddition of Activated Trifluoromethyl-Substituted Azomethine Ylides [PDF]

, 2016
This is the peer reviewed version of the following article: Chemistry – A European Journal 22.14 (2016): 4952 - 4959, which has been published in final form at http://doi.org/10.1002/chem.201504869. This article may be used for non-commercial purposes in
Adrio, Adrio, Arai, Bai, Beausoleil, Begue, Belhomme, Bezdudny, Bonin, Burger, Castello, Castelló, Chaume, Cheng, Corbett, Dai, Dai, Daly, Das, Erickson, Fritz, Fujiwara, González-Esguevillas, Gouverneur, Hashimoto, He, Huang, Khangarot, Kuhnert, Laduron, Li, Li, Li, Llamas, Ma, McAlpine, Michael, Müller, Nájera, O'Hagan, Ojima, Padilla, Pandey, Pascual-Escudero, Pellissier, Pinho e Melo, Potowski, Purser, Pyne, Roughley, Sato, Schlosser, Song, Stanley, Sun, Tanaka, Tran, van Niel, Whitby, Yan, Yang, Yuan, Zhao   +62 more
core   +2 more sources

Método espectrofotométrico simples e rápido para determinação de trans-chalcona em matéria-prima e em formulação tópica [PDF]

, 2023
Trans-chalcone (TC) is a flavonoid precursor characterized by a wide spectrum of action, with anti-inflammatory and antioxidant effects. However, no validated methods are available in official compendia for the analysis of this substance.
Baracat, Marcela Maria, Casagrande, Rúbia, Fukuda, Nathalia Yurika, Georgetti, Sandra Regina, Martinez, Renata, Silva, Jenifer Freitas da, Souza, Clara Ruiz de   +6 more
core   +3 more sources

(E)-3-(4-Methylphenyl)-1-(1,3-thiazol-2-yl)prop-2-en-1-one

Acta Crystallographica Section E, 2012
In the title chalcone, C13H11NOS, derived from the condensation of p-tolualdehyde and 1-(1,3-thiazol-2-yl)ethanone, the olefine group has a trans configuration. No classical hydrogen bonding is present in the crystal structure.
Annamalai Palaniappan, Arumugam Arulmozhivarman, Rajamanickam Ramachandran, Subramanian Srinivasan, Sivakolunthu Senthan   +4 more
doaj   +1 more source

Achieving Complexity at the Bottom: Molecular Metamorphosis Generated by Anthocyanins and Related Compounds [PDF]

, 2021
Funding Information: This work was supported by the Associated Laboratory for Sustainable Chemistry, Clean Processes and Technologies LAQV through the national funds from UIDB/50006/2020 and UIDP/50006/2020 as well as the European Regional Development ...
Basílio, Nuno, Cruz, Luis, De Freitas, Victor, Parola, A. Jorge, Petrov, Vesselin, Pina, Fernando, Sousa, Diogo   +6 more
core   +1 more source

Electron Paramagnetic Resonance Study of the Radiation Damage in Trans-Chalcone Single Crystal

Acta Physica Polonica A, 2019
Gamma irradiated trans-chalcone (C15H12O) single crystals are investigated at 120 K using electron paramagnetic resonance technique. Trans-chalcone single crystals are irradiated with Co-60-gamma rays, at room temperature. The EPR spectra of gamma irradiated trans-chalcone single crystals are studied for different orientations of crystals in a magnetic
Çalışkan, Betül., Cengiz Caliskan, A.   +1 more
openaire   +4 more sources

(2E,4E)-1-(2-Hydroxyphenyl)-5-phenylpenta-2,4-dien-1-one

Acta Crystallographica Section E, 2011
In the structure of the title chalcone, C17H14O2, derived from cinnamaldehyde, the olefine group has a trans configuration. The molecular conformation is stabilized by an intramolecular O—H...O hydrogen-bond interaction with graph-set motif S(6)
W. A. Silva, C. C. Gatto, G. R. Oliveira
doaj   +1 more source

Thermal and photochemical reactions of n-pyridinebenzopyrylium multistate of species (n = 2′,3′,4′). Exploring the synthetic potentialities from the unique reactivity of position 2′ [PDF]

, 2023
Funding Information: This work was supported by the Associate Laboratory for Green Chemistry – LAQV (projects UIDB/50006/2020 and UIDP/ 50006/2020), the Research Unit on Applied Molecular Biosciences – UCIBIO (projects UIDP/04378/2020 and UIDB/ 04378 ...
Alejo-Armijo, Alfonso, Camuenho, Ambrósio, Gomes, Clara S. B., Jorge Parola, A., Laia, César A. T., Pina, Fernando   +5 more
core   +1 more source

Stabilizing and Modulating Color by Copigmentation: Insights from Theory and Experiment [PDF]

, 2016
Natural anthocyanin pigments/dyes and phenolic copigments/co-dyes form noncovalent complexes, which stabilize and modulate (in particular blue, violet, and red) colors in flowers, berries, and food products derived from them (including wines, jams ...
Dangles, Olivier, De Freitas, Victor, Gierschner, Johannes, Otyepka, Michal, Sancho-Garcia, Juan-Carlos, Trouillas, Patrick   +5 more
core   +3 more sources

(E)-3-{4,6-Dimethoxy-2-[(E)-4-methoxystyryl]-3-methylphenyl}-1-(2-hydroxy-5-methoxyphenyl)prop-2-en-1-one

IUCrData, 2020
In the title compound, C28H28O6, the benzene rings in the resveratrol moiety are connected by a trans C=C double bond, and the hydroxyl group containing a benzene ring and the central benzene ring are linked through a C=(O)—C=C (enone) moiety to form a ...
Miri Yoo, Dongsoo Koh
doaj   +1 more source