Results 121 to 130 of about 20,590 (255)

Mycosporine-Like Amino Acids for Skin Photoprotection

, 2019
Background: Excessive human exposure to solar ultraviolet radiation (UVR) continues to be a major public health concern, with skin cancer rates increasing year on year.
Antony R. Young, Paul F. Long, Karl P. Lawrence   +2 more
core   +1 more source

Photodegradation of commercial insect repellents containing DEET and IR‐3535 under ultraviolet light associated or not with chemical ultraviolet filters evaluated by Raman spectroscopy

Photochemistry and Photobiology, EarlyView.
This study evaluated the photodegradation of commercial insect repellents containing DEET and IR‐3535 under UV‐A and UV‐B irradiation using Raman spectroscopy. Pure DEET and IR‐3535 showed intrinsic photostability, whereas DEET diluted in ethanol and a commercial DEET‐based formulation exhibited significant spectral changes after UV exposure.
Viviane Gadret Borio, Adriana Barrinha Fernandes, Leandro Procópio Alves, Adjaci Uchôa Fernandes, Landulfo Silveira Jr.   +4 more
wiley   +1 more source

Development of chalcones structure‐related to avobenzone: Photoprotection, photostability, and safety evaluation

Photochemistry and Photobiology, EarlyView.
Scaffold hopping strategy used to develop chalcones structure‐related to the avobenzone tautomer. Positive aspects of 2‐hydroxychalcones are highlighted. Abstract Chalcones are α,β‐unsaturated ketones with extended π‐conjugation, making them promising scaffolds for the development of organic UV filters.
Gabriela Zanella Marcon, Taíne de Bastos Brum, Nayara Fernanda Tokashike de Araujo, Gabriela Lascala Ramos, Bruna Cogo Borin, Ruth Barin, Aline Ferreira Ourique, André Passaglia Schuch, Andréa Inês Horn Adams, Lorena Rigo Gaspar Cordeiro, Letícia Cruz, Fernando Fumagalli   +11 more
wiley   +1 more source

Photoprotection: Current developments and controversies

This review aimed at summarizing some of the key points that were discussed during the photoprotection session at the International Forum of Dermatology in 2022.
Saint Aroman, Markéta, Brugués, Ariadna Ortiz, Sibaud, Vincent, Lim, Henry W, Pellacani, Giovanni, Stockfleth, Eggert   +5 more
core   +1 more source

Geometrical isomerization of hydroxycinnamic acid under UV‐light: Structural plasticity as a driver of metabolite complexity

Photochemistry and Photobiology, EarlyView.
UV irradiation drives metabolite complexity through photoisomerization of hydroxycinnamic acid‐containing compounds in plants. The olefin functional group of hydroxycinnamic acid enables structural plasticity through trans/cis isomerization. Multiple chromophores within a molecule can amplify UV‐induced transformations.
Mailane Rose Sekgobela, Lutendo Michael Mathomu, Nakisani Babra Moyo, Rudzani Nemadzhilili, Mwadham Mwombeki Kabanda, Ntakadzeni Edwin Madala   +5 more
wiley   +1 more source

A low‐cost handheld device for monitoring cutaneous photosensitivity

Photochemistry and Photobiology, EarlyView.
The cutaneous photosensitivity detection (CPD) device is a handheld contact‐based measurement device using 405 nm excitation and red fluorescence detection for monitoring skin phototoxicity risk after photodynamic therapy (PDT) procedures involving systemic aminolaevulinic acid (ALA) induced protoporphyrin IX (PpIX) photosensitization.
Md Asaduzzaman Rasel, Ryan Beland, Shakir Khan, Tayyaba Hasan, Jonathan P. Celli   +4 more
wiley   +1 more source

Dissecting the contributions to non-photochemical quenching in a land plant under fluctuating light

Nature Communications
Photosynthetic organisms have evolved multiple non-photochemical quenching (NPQ) processes, providing photoprotection by safely dissipating excess excitation energy.
Lam Lam, Rebecca Lee, Dhruv Patel-Tupper, Henry E. Lam, Tsung-Yen Lee, Alexa Ma, Sophia A. Ma, Hetty He, Krishna K. Niyogi, Graham R. Fleming   +9 more
doaj   +1 more source

Sun exposure and photoprotection: Habits, knowledge, and attitudes among elite beach soccer players

Photochemistry and Photobiology, EarlyView.
Elite beach soccer players experience high ultraviolet radiation exposure and frequent sunburn episodes despite widespread sunscreen use. Deficiencies in sunscreen reapplication, shade‐seeking behaviors, and skin surveillance practices were identified. These findings highlight the need for targeted photoprotection interventions in beach sports athletes.
Guillermo De Castro‐Maqueda, Pau Vaccaro‐Benet, Miguel Ángel Rosety Rodríguez, Macarena Rivero Vila   +3 more
wiley   +1 more source

Photoprotection for all: Current gaps and opportunities

, 2022
The effects of solar radiation on human skin differ based on the skin phototype, presence or absence of photodermatoses, biologic capacity to repair DNA damage, wavelength, intensity of sun exposure, geographic latitude, and other factors, underscoring ...
Draelos, Zoe D, Rigel, Darrell S, Taylor, Susan C, Lim, Henry W, Weber, Teresa M   +4 more
core  

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

Photochemistry 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, Marcus S. Cooke, Sanjay Premi   +2 more
wiley   +1 more source