Results 101 to 110 of about 1,254,309 (209)

The Role of Oxidative Stress in Periodontitis

open access: yesJournal of Periodontal Research, EarlyView.
Oxidative stress is involved in multiple chemical reactions that take place in different intracellular organelles: mitochondria, rough endoplasmic reticulum, peroxisomes, autophagy, and aging, and can be influenced by exogenous factors: nutrition, physical activity, psychological status, environmental conditions, microbiome, and drugs.
Pedro Bullon   +3 more
wiley   +1 more source

Oxygen-Mediated Sequential Down-Conversion in Perylenediimides [PDF]

open access: yes
Perylenediimides (PDIs) are among the best-known chromophores for optoelectronic applications. Their photophysics in oxygen-rich environments remains, however, underexplored.
Fernández-Lázaro, Fernando   +7 more
core   +1 more source

Photochemistry of CryB from Rhodobacter sphaeroides

open access: yesPhotochemistry and Photobiology, EarlyView.
Elucidation of the photochemistry of CryB from Rhodobacter sphaeroides was achieved from the nanosecond to second timescale. A fast (<5 ns) deprotonation of the terminal electron donor Trp338 and the involvement of Tyr337 in photoreduction have been revealed.
Christopher Einholz   +6 more
wiley   +1 more source

Revisiting the action spectrum of DNA damage: Chemiexcitation and the expanded biological spectrum of cyclobutane pyrimidine dimer formation

open access: yesPhotochemistry and Photobiology, EarlyView.
UVB and UVA generate cyclobutane pyrimidine dimers (CPDs) during irradiation (purple). After exposure ends, chemiexcitation in pigmented melanocytes continues to generate delayed CPDs (yellow), even as repair removes some pre‐existing lesions. Consequently, total CPD burden can rise while visible erythema fades.
Jyoti Srivastava   +2 more
wiley   +1 more source

Surface Ligand Engineering in Quantum Dot Photocatalysis: Mechanisms, Design Principles, and Applications

open access: yesAdvanced Chemical Engineering, Volume 1, Issue 2, December 2026.
Surface ligands govern quantum dot photocatalysis through thermodynamic band‐edge tuning, kinetic charge‐transfer regulation, and microenvironmental control. Rational ligand engineering, using short‐chain, inorganic, conjugated, or dual‐ligand systems, enables efficient solar fuel production, selective organic transformations, environmental remediation,
Yali Weng   +5 more
wiley   +1 more source

Synthesis and Photoacoustic Characterization of Amphiphilic Ni(II) Phthalocyanines as Calorimetric References

open access: yesChemPhysChem, Volume 27, Issue 21, 12 November 2026.
A series comprised by four nonionic yet amphiphilic octa‐substituted Ni(II) phthalocyanines is introduced. These NiPcs are soluble in both polar organic solvents and aqueous media. A new experimental setup was developed to investigate their photoacoustic efficiency by combining transient absorption and photoacoustic spectroscopy. This approach revealed
Sidharth Thulaseedharan Nair Sailaja   +5 more
wiley   +1 more source

Preliminary study of a centrifugal-flow singlet oxygen generator

open access: yes, 2008
By using the concept of a high-pressure, gravity-independent singlet oxygen generator (SOG) proposed by Emanuel and based on the principle that a rotating fluid is capable of producing an enormous centrifugal force, a novel-type centrifugal-flow singlet ...
Zhang, Cunhao   +5 more
core   +1 more source

Thiolane Sulfoximines as Azide Surrogates for Quinolyl Nitrenes: Photochemical Access to Ortho‐Diaminoquinolines

open access: yesAdvanced Synthesis &Catalysis, Volume 368, Issue 21, 3 November 2026.
Thiolane sulfoximines provide practical and safer surrogates for hazardous azides in nitrene photochemistry, enabling direct access to 7,8‐diaminoquinolines and fused δ‐lactams. DFT calculations support the reaction mechanism and rationalize product selectivity.
Lorenzo Serusi   +5 more
wiley   +1 more source

Singlet Oxygen Elimination

open access: yes, 2005
A method to eliminate excessive singlet oxygen in a chemical oxygen iodine laser is demonstrated. This is important for the design of an ejector that pumps the laser system.
Waiblinger, Frank
core  

Reactivity of Singlet Oxygen with Biomolecular Constituents

open access: yes, 2016
Theoretical results on Reactivity of Singlet Oxygen with Biomolecular ...
Marchetti, Barbara   +3 more
core   +1 more source

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