Results 21 to 30 of about 55,314 (289)

Beta vulgaris L.—A Source with a Great Potential in the Extraction of Natural Dyes Intended for the Sustainable Dyeing of Wool

open access: yesPlants, 2023
Beta vulgaris L. is a biennial plant easily accessible all over the world, rich in various biologically active compounds, especially a class of extremely bioactive pigments known as betalains.
Vasilica Popescu   +3 more
doaj   +1 more source

Ionic strength effect on deprotonation of para-sulfonatocalix[4]arene [PDF]

open access: yesJournal of the Serbian Chemical Society, 2013
The deprotonation of para-sulfonatocalix[4]arene were studied by a combination of spectrophotometric and potentiometric methods at 25°C. The ionic strength of solutions was kept constant by sodium perchlorate as background electrolyte at 0.10 to 4.0 ...
Faraji Mohammad   +2 more
doaj   +1 more source

Long-Distance Protonation-Conformation Coupling in Phytochrome Species

open access: yesMolecules, 2022
Phytochromes are biological red/far-red light sensors found in many organisms. The connection between photoconversion and the cellular output signal involves light-mediated global structural changes in the interaction between the photosensory module (PAS-
Maryam Sadeghi   +3 more
doaj   +1 more source

Microhydration of Deprotonated Nucleobases [PDF]

open access: yesJournal of the American Society for Mass Spectrometry, 2016
Hydration reactions of deprotonated nucleobases (uracil, thymine, 5-fluorouracil,2-thiouracil, cytosine, adenine, and hypoxanthine) produced by electrospray have been experimentally studied in the gas phase at 10 mbar using a pulsed ion-beam high-pressure mass spectrometer.
openaire   +2 more sources

Plasmon induced deprotonation of 2-mercaptopyridine [PDF]

open access: yes, 2020
Surface plasmons can provide a novel route to induce and simultaneously monitor selective bond formation and breakage. Here pH-induced protonation, followed by plasmon-induced deprotonation of 2-mercaptopyridine was investigated using surface- and tip ...
Singh P.   +3 more
core   +1 more source

5-Fluorouracil—Complete Insight into Its Neutral and Ionised Forms

open access: yesMolecules, 2019
5-Fluorouracil (5FU), a common anti-cancer drug, occurs in four tautomeric forms and possesses two potential sites of both protonation and deprotonation.
Justyna Wielińska   +2 more
doaj   +1 more source

Investigation of Brønsted acidity in zeolites through adsorbates with diverse proton affinities

open access: yesScientific Reports, 2023
Understanding the adsorption behavior of base probes in aluminosilicates and its relationship to the intrinsic acidity of Brønsted acid sites (BAS) is essential for the catalytic applications of these materials.
Michal Trachta   +4 more
doaj   +1 more source

Deprotonation-Induced and Ion-Pairing-Modulated Diradical Properties of Partially Conjugated Pyrrole–Quinone Conjunction [PDF]

open access: yes, 2023
Quinoidal molecules based on dipyrrolyldiketone boron complexes (QPBs), in which pyrrole units were connected by a partially conjugated system as a singlet spin coupler, were synthesized.
Yohei Haketa (2186671)   +7 more
core   +1 more source

Computational assessment of the feasibility of protonation-based protein sequencing

open access: yesPLoS ONE, 2020
Recent advances in DNA sequencing methods revolutionized biology by providing highly accurate reads, with high throughput or high read length. These read data are being used in many biological and medical applications.
Giles Miclotte   +3 more
doaj   +2 more sources

Internal Solvation Effects on the Reactivity of alpha,omega-Diphenylalkanes toward ME(3)C(+) Ions [PDF]

open access: yes, 1995
Crestoni ME, Fornarini S, Kuck D. Internal Solvation Effects on the Reactivity of alpha,omega-Diphenylalkanes toward ME(3)C(+) Ions. Journal of Physical Chemistry.
Fornarini, Simonetta   +3 more
core   +2 more sources

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