Results 51 to 60 of about 162,281 (356)

Evidence for the Formation of Ozone (or Ozone-Like Oxidants) by the Reaction of Singlet Oxygen with Amino Acids

Journal of Chemistry, 2018
Antibodies or some amino acids, namely, cysteine, methionine, histidine, and tryptophan, were previously reported to catalyse the conversion of singlet oxygen (1O2) to ozone (O3).
George W. Wanjala, Arnold N. Onyango, David Abuga, Calvin Onyango, Moses Makayoto   +4 more
doaj   +1 more source

Oxidation of Catalase by Singlet Oxygen [PDF]

Journal of Biological Chemistry, 1998
Different bands of catalase activity in zymograms (Cat-1a-Cat-1e) appear during Neurospora crassa development and under stress conditions. Here we demonstrate that singlet oxygen modifies Cat-1a, giving rise to a sequential shift in electrophoretic mobility, similar to the one observed in vivo. Purified Cat-1a was modified with singlet oxygen generated
Pablo Rangel, Wilhelm Hansberg, Fernando Lledías   +2 more
openaire   +2 more sources

Developmental stage is an important factor that determines the antioxidant responses of young and old grapevine leaves under UV irradiation in a green-house. [PDF]

, 2011
The impact of UV irradiation was studied on photosynthesis, photosystem II photochemical yields and antioxidant responses using green-house grown grapevine (Vitis vinifera L. cv. Chardonnay) leaves.
Hideg, Éva, Majer, Petra
core   +1 more source

Intermolecular Interactions as Driving Force of Increasing Multiphoton Absorption in a Perylene Diimide‐Based Coordination Polymer

Advanced Functional Materials, EarlyView.
This study uncovers the unexplored role of intermolecular interactions in multiphoton absorption in coordination polymers. By analyzing [Zn2tpda(DMA)2(DMF)0.3], it shows how the electronic coupling of the chromophores and confinement in the MOF enhance two‐and three‐photon absorption.
Simon Nicolas Deger, Anna Mauri, Yang Cui, Sebastian Josef Weishäupl, Ali Deniz Özdemir, Hamad Syed, Aleksandr Ovsianikov, Wolfgang Wenzel, Alexander Pöthig, Jürgen Hauer, Mariana Kozlowska, Roland Augustinus Fischer   +11 more
wiley   +1 more source

Janus electrocatalytic flow-through membrane enables highly selective singlet oxygen production

Nature Communications, 2020
Electrocatalytic processes are promising for automated and scalable synthesis of singlet oxygen, but they are energy- and chemical-intensive. Here the authors present a Janus electrocatalytic membrane that selectively produces singlet oxygen with low ...
Yumeng Zhao, Meng Sun, Xiaoxiong Wang, Chi Wang, Dongwei Lu, Wen Ma, Sebastian A. Kube, Jun Ma, Menachem Elimelech   +8 more
doaj   +1 more source

Parallel fluorescence and phosphorescence monitoring of singlet oxygen photosensitization in rats [PDF]

Journal of Innovative Optical Health Sciences, 2015
The time- and spectral-resolved set-up for measurements of weak infrared luminescence of photosensitizers (PSs) and singlet oxygen using optical lightguides was used on skin of laboratory animals in vivo.
Roman Dědic, Adam Stíbal, Vojtěch Vyklický, Miloslav Franěk, Antonín Svoboda, Jan Hála   +5 more
doaj   +1 more source

Signatures of nonadiabatic O2 dissociation at Al(111): First-principles fewest-switches study [PDF]

, 2009
Recently, spin selection rules have been invoked to explain the discrepancy between measured and calculated adsorption probabilities of molecular oxygen reacting with Al(111).
Axel Groß, Christian Carbogno, Jörg Behler, Karsten Reuter, N. W. Ashcroft   +4 more
core   +1 more source

Intramolecular Down‐ and Up‐Conversion in Dimeric Tetracene Complexes Centered via Platinum(II) and Palladium(II)

Advanced Functional Materials, EarlyView.
Metal‐tetracene dimeric complexes are synthesized through the pyridyl coordination to either Pt(II) or Pd(II). Photophysical properties are systematically compared as a function of the metal using steady‐state and time‐resolved spectroscopy. The Pt(II) dimer exhibits efficient intramolecular singlet fission and subsequent intramolecular up‐conversion ...
Yifan Bo, Yuxuan Hou, Melchor Matabuena, Rik R. Tykwinski, Dirk M. Guldi   +4 more
wiley   +1 more source

Lactate Dehydrogenase-B Oxidation and Inhibition by Singlet Oxygen and Hypochlorous Acid

Oxygen
Alterations in cellular energy metabolism are a hallmark of cancer and lactate dehydrogenase (LDH) enzymes are overexpressed in many cancers regardless of sufficient oxygen and functional mitochondria. Further, L-lactate plays signaling roles in multiple
Lisa M. Landino, Emily E. Lessard
doaj   +1 more source

Supramolecular Control of Singlet Oxygen Generation

Molecules, 2021
Singlet oxygen (1O2) is the excited state electronic isomer and a reactive form of molecular oxygen, which is most efficiently produced through the photosensitized excitation of ambient triplet oxygen.
Akshay Kashyap, Elamparuthi Ramasamy, Vijayakumar Ramalingam, Mahesh Pattabiraman   +3 more
doaj   +1 more source