Results 91 to 100 of about 12,116 (235)

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

The adaptability of soybean photosynthesis to midday high-light duration through CEF-NPQ coupling regulation

Frontiers in Plant Science
Fluctuating light (FL) conditions particularly the diurnal alternation between shaded and high-light periods are intrinsic to intercropping systems and impose substantial regulatory challenges on crop photosynthesis.
Yi Lei, Yi Lei, Yi Lei, Xiaoling Wu, Xiaoling Wu, Xiaoling Wu, Jing Gao, Jing Gao, Jing Gao, Qi Wang, Qi Wang, Qi Wang, Jingru Wang, Jingru Wang, Jingru Wang, Dhungana Diwakar, Dhungana Diwakar, Dhungana Diwakar, Xianming Tan, Xianming Tan, Xianming Tan, Feng Yang, Feng Yang, Feng Yang, Wenyu Yang, Wenyu Yang, Wenyu Yang   +26 more
doaj   +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

A randomized trial of a wearable UV dosimeter for skin cancer prevention

Frontiers in Medicine
BackgroundNon-melanoma skin cancer (NMSC) is the most prevalent cancer in the United States. Despite guidelines on ultraviolet (UV) avoidance, it remains difficult for people to assess their exposure, as UV is invisible and the onset of UV-induced ...
Emmanuel L. P. Dumont, Emmanuel L. P. Dumont, Peter D. Kaplan, Catherine Do, Shayak Banerjee, Melissa Barrer, Khaled Ezzedine, Jonathan H. Zippin, George I. Varghese   +8 more
doaj   +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

Photosystem II efficiency in response to diurnal and seasonal variations in photon flux density and air temperature for green, yellow-green, and purple-leaved cultivars of sweet potato [Ipomoea batatas (L.) Lam]

Photosynthetica
This study aimed to investigate the impact of diurnal and seasonal variations in photon flux density (PPFD) and air temperature on PSII efficiency in three sweet potato leaf-color cultivars: green (G), yellow-green (Y), and purple (P). The cultivars were
J.Y. JIANG, C.W. WANG, C.I. CHEN, C.W. CHEN, S.L. WONG, S.P. CHEN, M.Y. HUANG, J.H. WENG   +7 more
doaj   +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

Time‐series multi‐omics analysis of micronutrient stress in Sorghum bicolor reveals iron and zinc crosstalk and regulatory network conservation

Plant Biology, EarlyView.
Overlap between Fe and Zn responsive gene regulatory networks (GRNs) were found, indicative of micronutrient crosstalk, and conservation of root and leaf GRNs and genes suggests strong constraint on homeostasis networks in plants. Abstract Micronutrient stress impacts growth, biomass production, and grain yield in crops.
A. Mishra, A. Bhat, S. Kumari, R. Sharma, J. Braynen, D. Tadesse, S. El Alaoui, S. Seaver, N. Grosjean, D. Ware, M. Xie, T. Paape   +11 more
wiley   +1 more source

Two proteins co‐expressed with photosynthetic regulators affect photosynthetic dynamics linked to changes in thylakoid pigment content and composition

Plant Biology, EarlyView.
Two factors identified by co‐expression analysis of photosynthetic regulators are described, which are involved in thylakoid pigment content and composition and, through their function, shape the dynamics of NPQ. Abstract Rapid fluctuations in light intensity require swift regulatory adjustments of photosynthesis. Although the major plant regulators of
J.‐M. Keller, F. Dinc, E. Kaiser, A. Zupok, B. A. Morris, T. von Bismarck, V. Correa Galvis, W. Thiele, D. M. Kramer, P. Jahns, M. A. Schöttler, U. Armbruster   +11 more
wiley   +1 more source

Valorization of Date Seed Waste for Sustainable Dermocosmetic Sunscreens: Phytochemical Insights and Formulation Advances

Cosmetics
Valorization of Phoenix dactylifera L. (date) seeds, an abundant agro-industrial byproduct, offer a sustainable approach to developing multifunctional ingredients for dermocosmetic photoprotection.
Nassima Siroukane, Abdelhakim Kheniche, Lynda Souiki   +2 more
doaj   +1 more source