Results 1 to 10 of about 62,736 (263)

Targeting cancer cell mitochondria with a multivalent source of singlet oxygen [PDF]

Smart Molecules
Naphthalene, anthracene and pyridone endoperoxides are known to thermally release singlet oxygen. However, in the cycloreversion reaction, singlet oxygen is produced stoichiometrically; therefore, multiple singlet oxygen releasing modules are expected to
Wanwan Wang, Lei Wang, Rensong Sun, Shoucai Yan, Engin U. Akkaya   +4 more
doaj   +2 more sources

Generation of singlet oxygen by porphyrin and phthalocyanine derivatives regarding the oxygen level

Journal of Medical Science, 2022
Background. The principle of photodynamic effect is based on the combined action of photosensitiser, molecular oxygen and light, which produce various reactive oxygen species and are associated with significant cellular damage.
Martin Pola, Hana Kolarova, Robert Bajgar   +2 more
doaj   +1 more source

Progress in application and detection of riboflavin singlet oxygen photochemistry

Zhongguo shuxue zazhi, 2022
Photodynamic therapy (PDT), which uses photosensitizers to produce singlet oxygen to kill bacteria, was first discovered by scientists over 100 years ago and has been widely used in clinical treatment.
Yuanyuan HE, Ling LI, Keyang CHEN, Zhong LIU   +3 more
doaj   +1 more source

Determination of singlet oxygen quenching rate and mechanism of γ-oryzanol

Heliyon, 2021
Photooxidation is one of the causes of quality deterioration in food. An antioxidant or singlet oxygen quencher is urgently needed to prevent photooxidation. γ-Oryzanol was recognized as a naturally present antioxidant in rice bran products.
Yuli Perwita Sari, Umar Santoso, Supriyadi, Sri Raharjo   +3 more
doaj   +1 more source

NanoFN10: A High-Contrast Turn-On Fluorescence Nanoprobe for Multiphoton Singlet Oxygen Imaging

Sensors, 2023
An “off-on” fluorescent nanoprobe for near-infrared multiphoton imaging of singlet oxygen has been developed. The nanoprobe comprises a naphthoxazole fluorescent unit and a singlet-oxygen-sensitive furan derivative attached to the surface of mesoporous ...
Renzo P. Zanocco, Roger Bresolí-Obach, Francisco Nájera, Ezequiel Pérez-Inestrosa, Antonio L. Zanocco, Else Lemp, Santi Nonell   +6 more
doaj   +1 more source

Singlet Dioxygen ¹O₂, its Generation, Physico-Chemical Properties and its Possible Hormetic Behavior in Cancer Therapy

Substantia, 2022
Singlet dioxygen 1O2 is one excited state among the three other possible spectroscopic states of molecular oxygen. Here, we first describe the use of published spectroscopic data and thermodynamic modeling based on irreversible entropy production.
Marc Henry, Miro Radman, Luc Benichou, Khalid O. Alfarouk, Laurent Schwartz   +4 more
doaj   +1 more source

Structure-activity study of furyl aryloxazole fluorescent probes for the detection of singlet oxygen. [PDF]

PLoS ONE, 2018
In this study, we report the synthesis and the photochemical behavior of a series of new "click-on" fluorescent probes designed to detect singlet oxygen.
Renzo P Zanocco, Roger Bresoli-Obach, Santi Nonell, Else Lemp, Antonio L Zanocco   +4 more
doaj   +1 more source

Phosphoprotein SAK1 is a regulator of acclimation to singlet oxygen in Chlamydomonas reinhardtii

eLife, 2014
Singlet oxygen is a highly toxic and inevitable byproduct of oxygenic photosynthesis. The unicellular green alga Chlamydomonas reinhardtii is capable of acclimating specifically to singlet oxygen stress, but the retrograde signaling pathway from the ...
Setsuko Wakao, Brian L Chin, Heidi K Ledford, Rachel M Dent, David Casero, Matteo Pellegrini, Sabeeha S Merchant, Krishna K Niyogi   +7 more
doaj   +1 more source

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

Molecules, 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, Banu Öngel, Eric Brüllingen, Melissa Renner   +3 more
doaj   +1 more source

Penggunaan Larutan Ekstrak Etanol dari Temulawak Sebagai Fotosensitizer di Dalam Pemutihan (Pengelantangan) Pulp dengan Penyinaran Lampu

Dinamika Kerajinan dan Batik: Majalah Ilmiah, 2016
ABSTRAKEkstrak etanol dari temulawak (Curcuma Xanthorriza) dapat digunakan sebagai fotosensitiser pada pemutihan pulp dengan penyinaran lampu, dimana pada pemutihan ini menghasilkan oksigen singlet yang mendegradasi lignin di dalam pulp (delignifikasi ...
Arif Perdana
doaj   +1 more source