Results 21 to 30 of about 335,942 (328)

The Antiaging Activity of Ergothioneine in UVA-Irradiated Human Dermal Fibroblasts via the Inhibition of the AP-1 Pathway and the Activation of Nrf2-Mediated Antioxidant Genes

Oxidative Medicine and Cellular Longevity, 2020
UVA irradiation induced ROS-mediated photo damage to the human skin leading to coarseness, wrinkling, pigmentation, and cutaneous malignancies. We investigated the dermatoprotective efficacies of submicromolar concentrations of ergothioneine (EGT, 0.125 ...
Y. Hseu, Yugandhar Vudhya Gowrisankar, Xuan Chen, Yi-Chen Yang, Hsin-Ling Yang   +4 more
semanticscholar   +1 more source

N‐heterocyclic carbene catalyzed photoenolization/Diels–Alder reaction of acid fluorides [PDF]

, 2019
The combination of light activation and N‐heterocyclic carbene (NHC) organocatalysis has enabled the use of acid fluorides as substrates in a UVA‐light‐mediated photochemical transformation previously observed only with aromatic aldehydes and ketones ...
Agrawal, Arush, Golz, Paul, Götze, Jan P., Hopkinson, Matthew N., Mavroskoufis, Andreas, Rajes, Keerthana, Ruß, Vincent   +6 more
core   +1 more source

The Skin-Whitening Effects of Ectoine via the Suppression of α-MSH-Stimulated Melanogenesis and the Activation of Antioxidant Nrf2 Pathways in UVA-Irradiated Keratinocytes

Antioxidants, 2020
Ultraviolet A (UVA)-irradiation induced reactive oxygen species (ROS) production mediates excessive melanogenesis in skin cells leading to pigmentation.
Y. Hseu, Xuan Chen, Yugandhar Vudhya Gowrisankar, Hung-Rong Yen, J. Chuang, Hsin-Ling Yang   +5 more
semanticscholar   +1 more source

On the Existence of Supersingular Curves of Given Genus [PDF]

, 1994
We give a method to construct explicitly a supersingular curve of given genus g in characteristic 2.Comment: 9 pages, plain TeX, UvA-report 94 ...
van der Geer, Gerard, van der Vlugt, Marcel   +1 more
core   +9 more sources

CYANIDIN-3-GLUCOSIDE PROMOTES LONGEVITYAND TOLERANCE AGAINST UVA AND OXIDATIVE STRESS IN CAENORHABDITIS ELEGANS [PDF]

Exploratory Animal and Medical Research, 2023
Crude anthocyanins extracted from different fruits and vegetables extend the lifespan of various organisms. However, the effects of pure anthocyanin compounds on the lifespan are still unknown.
John Sylvester B. Nas, Paul Mark B. Medina   +1 more
doaj   +1 more source

Protocatechuic Aldehyde Attenuates UVA-induced Photoaging in Human Dermal Fibroblast Cells by Suppressing MAPKs/AP-1 and NF-κB Signaling Pathways

International Journal of Molecular Sciences, 2020
Ultraviolet radiation (UV) is a major causative factor of DNA damage, inflammatory responses, reactive oxygen species (ROS) generation and a turnover of various cutaneous lesions resulting in skin photoaging.
Yuling Ding, Chanipa Jiratchayamaethasakul, Seung-Hong Lee   +2 more
semanticscholar   +1 more source

RodZ and PgsA play intertwined roles in membrane homeostasis of Bacillus subtilis and resistance to weak organic acid stress

Frontiers in Microbiology, 2016
Weak organic acids like sorbic and acetic acid are widely used to prevent growth of spoilage organisms such as Bacilli. To identify genes involved in weak acid stress tolerance we screened a transposon mutant library of Bacillus subtilis for sorbic acid ...
Johan Willem Albertus Van Beilen, Christoph J. Blohmke, Christoph J. Blohmke, Hendrik Folkerts, Hendrik Folkerts, Richard de Boer, Anna Zakrzewska, Anna Zakrzewska, Wim Kulik, Fred Vaz, Stanley Brul, Alexander Ter Beek, Alexander Ter Beek   +12 more
doaj   +1 more source

Ceria Nanoparticles Decrease UVA-Induced Fibroblast Death Through Cell Redox Regulation Leading to Cell Survival, Migration and Proliferation

Frontiers in Bioengineering and Biotechnology, 2020
Exposure to ultraviolet radiation is a major contributor to premature skin aging and carcinogenesis, which is mainly driven by overproduction of reactive oxygen species (ROS).
F. M. Ribeiro, Mariana Maciel de Oliveira, Sushant Singh, T. Sakthivel, Craig J. Neal, S. Seal, T. Ueda-Nakamura, S. O. Lautenschlager, C. Nakamura   +8 more
semanticscholar   +1 more source

Sensitivity of Antarctic Urospora penicilliformis (Ulotrichales, Chlorophyta) to ultraviolet radiation is life stage dependent [PDF]

, 2009
The sensitivity of different life stages of the eulittoral green alga Urospora penicilliformis (Roth) Aresch. to ultraviolet radiation (UVR) was examinedin the laboratory.
Campana, G., Hanelt, Dieter, Quartino, M. L., Roleda, Michael, Wiencke, Christian, Wulff, A.   +5 more
core   +1 more source

The Austrian UVA‐Network [PDF]

Photochemistry and Photobiology, 2019
AbstractThe ultraviolet‐A (UVA) part of the solar spectrum at the Earth's surface is an essential environmental factor but continuous long‐time monitoring of UVA radiation is rarely done. In Austria, three existing stations of the UV monitoring network have been upgraded with UVA broadband instruments.
Alois W. Schmalwieser, Barbara Klotz, Michael Schwarzmann, Dietmar J. Baumgartner, Josef Schreder, Günther Schauberger, Mario Blumthaler   +6 more
openaire   +2 more sources