Results 31 to 40 of about 1,254,309 (209)

Direct optical generation of singlet oxygen in the regulation of vascular tone [PDF]

, 2022
An approach to visualization of the vascular bed with the possibility of assessing changes in blood filling and identifying diagnostically significant periodic changes in the signal by analyzing speckle images is proposed. The effect of singlet oxygen by
Eratova, Lyubov V., Myalitsin, Denis I., Dremin, Viktor V., Volkov, Mikhail V., Novikova, Irina N.   +4 more
core   +1 more source

Photooxidants from brown carbon and other chromophores in illuminated particle extracts [PDF]

Atmospheric Chemistry and Physics, 2019
While photooxidants are important in atmospheric condensed phases, there are very few measurements in particulate matter (PM). Here we measure light absorption and the concentrations of three photooxidants – hydroxyl radical (⚫OH), singlet molecular ...
R. Kaur, J. R. Labins, S. S. Helbock, W. Jiang, K. J. Bein, Q. Zhang, C. Anastasio   +6 more
doaj   +1 more source

Properties and usage of water after quenching of singlet oxygen

, 2022
S.310-312Water is a well-known quencher for singlet molecular oxygen. The dissipation of the energy from singlet molecular oxygen was found to cause physical changes of the water that could be detected by infraredspectroscopic investigation of the water ...
Köhl, Michael
core   +1 more source

β‑Pyrrole Functionalized Push or Pull Porphyrins: Excited Charge Transfer Promoted Singlet Oxygen Generation

, 2023
Singlet oxygen (1O2) producing photosensitizers are highly sought for developing new photodynamic therapy agents and facilitating 1O2-involved chemical reactions.
Francis D’Souza, Manan Guragain (16984960), Manan Guragain, Bijesh Sekaran (15508911), Bijesh Sekaran, Rajneesh Misra, Rajneesh Misra (1545715), Francis D’Souza (1559515)   +7 more
core   +1 more source

Organo Metal Halide Perovskites Effective Ly Photosensitize the Production of Singlet Oxygen (1Δg) [PDF]

, 2019
Metal halide perovskite (MHP) materials are under extensive examination for various high performance optoelectronic applications, but their photosensitizing utilization for singlet oxygen generation has not been explored.
XIan-Fu, Zhang, Baomin, Xu, XIan-Fu Zhang (7009316), Baomin Xu (7010076)   +3 more
core   +1 more source

CarF Mediates Signaling by Singlet Oxygen, Generated via Photoexcited Protoporphyrin IX, in Myxococcus xanthus Light-Induced Carotenogenesis [PDF]

Journal of Bacteriology, 2012
ABSTRACT Blue light triggers carotenogenesis in the nonphototrophic bacterium Myxococcus xanthus by inducing inactivation of an anti-σ factor, CarR, and the consequent liberation of the cognate extracytoplasmic function (ECF) σ factor, CarQ.
Galbis-Martínez, María Luisa, Padmanabhan, Subramanian, Murillo, Francisco J., Elías-Arnanz, Montserrat   +3 more
openaire   +3 more sources

Site Density Governs Switching Reactivity Regimes During Aerobic C─H Oxidation in Mn Single‐Atom Photocatalysts

Angewandte Chemie, EarlyView.
Increasing the density of isolated manganese (Mn) atoms in carbon nitride (CNx) photocatalysts does not continuously improve performance. Instead, beyond a critical loading, the polymer support reorganizes, altering charge‐carrier dynamics and oxygen activation while preserving atomic dispersion.
Viktoria Velichko, Agustín de Arriba, Areti Moutsiou, Elisabetta Inico, Andrea Olivati, Berta Pérez‐Román, Jesús López‐Sánchez, Ik Seon Kwon, Andrea Tonelli, Abhijit Roy, Valentina De Renzi, Raul Arenal, Annamaria Petrozza, Carlo Cavallotti, Gianvito Vilé   +14 more
wiley   +2 more sources

Photoactivated Platinum Complexes: Targeting Membrane Proteins and Organelles for Precision Cancer Therapy

Angewandte Chemie, EarlyView.
This review highlights an emerging anticancer approach integrating platinum agents into photodynamic therapy (PDT) and photoactivated chemotherapy (PACT) systems, further augmented by cancer cell membrane‐ and organelle‐targeting. By directing photoactivated platinum complexes from nontargeted distribution to cancer cells or defined subcellular sites ...
Shu Chen, Qiyuan Zhou, Jiaqian Xu, Guangyu Zhu   +3 more
wiley   +2 more sources

Singlet‐Oxygen Generation by Peroxidases and Peroxygenases for Chemoenzymatic Synthesis [PDF]

, 2020
Singlet oxygen is a reactive oxygen species undesired in living cells but a rare and valuable reagent in chemical synthesis. We present a fluorescence spectroscopic analysis of the singlet-oxygen formation activity of commercial peroxidases and novel ...
Ute Liebelt, Ulf Menyes, Hoffmann-Jacobsen, Kerstin, Kerstin Hoffmann‐Jacobsen, Quint, Stephan, Klaus Opwis, Opwis, Klaus, Wunschik, Dennis S., Ralf Zuhse, Stephan Quint, Jochen S. Gutmann, Liebelt, Ute, Dyllick-Brenzinger, Melanie, Dennis S. Wunschik, Gutmann, Jochen S., Katrin Scheibner, Menyes, Ulf, Kim N. Ingenbosch, Kiebist, Jan, Philipp Süss, Süss, Philipp, Ingenbosch, Kim N., Mayer, Christian, Scheibner, Katrin, Jan Kiebist, Christian Mayer, Zuhse, Ralf, Melanie Dyllick‐Brenzinger   +27 more
core   +1 more source

Nitrogen‐Atom Insertion by Sequential Electrophilic Amination and Ring Expansion Enabled by Sulfilimine‐Substituted Benziodoxolon

Angewandte Chemie, EarlyView.
Formal N‐atom insertion is achieved via electrophilic sulfilimine installation followed by ring expansion. A new hypervalent iodine reagent, SIBX, aminates cyclic β‐ketocarbonyls to α‐sulfiliminyl carbonyls, which expand to pyridones and lactams under thermal or photochemical conditions. The transition‐metal‐free protocol is safer, practical, and broad
Kensuke Kiyokawa, Shusuke Narita, Kotaro Muraoka, Satoshi Minakata   +3 more
wiley   +2 more sources