Results 21 to 30 of about 1,218,797 (156)

New Photochromic α-Methylchalcones Are Highly Photostable, Even under Singlet Oxygen Conditions: Breaking the α-Methyl Michael-System Reactivity by Reversible Peroxybiradical Formation

open access: yesMolecules, 2021
The α-methylated chalcones 7a–7e behave as P-type photochromic substances with photo-stationary states (PSS) as high as 15:85 when irradiated at 350 nm.
Axel G. Griesbeck   +3 more
doaj   +1 more source

Thiophenyl ether disiloxanes and trisiloxanes useful as lubricant fluids [PDF]

open access: yes, 1974
The characteristics of organosilicon compounds for lubrication under extreme conditions are discussed. The substances considered are thiophenyl ether disiloxanes and trisiloxanes.
Akawie, R. I., Bilow, N.
core   +1 more source

Aryloxyalkanoic Acids as Non-Covalent Modifiers of the Allosteric Properties of Hemoglobin

open access: yesMolecules, 2016
Hemoglobin (Hb) modifiers that stereospecifically inhibit sickle hemoglobin polymer formation and/or allosterically increase Hb affinity for oxygen have been shown to prevent the primary pathophysiology of sickle cell disease (SCD), specifically, Hb ...
Abdelsattar M. Omar   +7 more
doaj   +1 more source

Prooxidant and antioxidant role of reductones and polyphenols in beer.

open access: yesKvasný průmysl, 2004
The beer bottled or racked without oxygen presence represents an oxidation-reduction system, in which a relatively slow exchange of electrons among donors and acceptors of electrons takes place.
Jan ŠAVEL
doaj   +1 more source

The Electronic and Superconducting Properties of Oxygen-Ordered MgB2 compounds of the form Mg2B3Ox

open access: yes, 2004
Possible candidates for the Mg2B3Ox nanostructures observed in bulk of polycrystalline MgB2 (Ref.1) have been studied using a combination of Z-contrast imaging, electron energy loss spectroscopy (EELS) and first-principles calculations.
C. B. Eom   +6 more
core   +1 more source

Synthesis and potential use of 1,8-naphthalimide type O-1(2) sensor molecules [PDF]

open access: yes, 2013
New double (fluorescent and spin) sensor molecules containing 4-amino substituted 1,8-naphthalimide as a fluorophore and a sterically hindered amine (pre-nitroxide) or pyrroline nitroxide as a quencher and radical capturing moiety were synthesized.
Bognár   +41 more
core   +1 more source

Therapeutic mechanistic study of novel indole derivatives as SIRTUIN3 modulators in Parkinson’s disease with in vitro evaluation

open access: yesScientific Reports
SIRT3 modulates reactive oxygen species and helps to reduce oxidative stress, resulting in a neuroprotective effect in Parkinson’s disease. The work seeks to develop and synthesize novel, effective SIRT3 modulators, which will modify SIRT3 expression and
Jagdish Chand   +4 more
doaj   +1 more source

Investigation of the reactivity of organic materials in liquid oxygen [PDF]

open access: yes, 1970
Measurements of impact-ignition sensitivity and studies of the relative reactivity of t-butoxy and t-butyl peroxy radicals toward a variety of organic compounds reveal improved methods of selection of materials for safe use in a liquid oxygen ...
Chamberlain, D.   +4 more
core   +1 more source

Phase equilibria and thermodynamic properties of oxide systems on the basis of rare earth, alkaline earth and 3d-transition (Mn, Fe, Co) metals. A short overview of [PDF]

open access: yes, 2015
Review is dedicated studies of phase equilibria in the systems based on rare earth elements and 3d transition metals. It’s highlighted several structural families of these compounds and is shown that many were found interesting properties for practical ...
Aksenova, T. V.   +5 more
core   +2 more sources

Extraction and Chromatographic Approaches for Coumarin, Furocoumarin, and Polymethoxyflavone Characterization in Foods

open access: yesFoods
Oxygen heterocyclic compounds play a beneficial role in plants, and their presence in foods, such as Citrus fruits, cinnamon, carrots, and parsley, has been documented in recent years.
Giovanna Cafeo   +3 more
doaj   +1 more source

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