Results 11 to 20 of about 17,338 (213)

Multiparametric Quantitative Analysis of Photodamage to Skin Using Optical Coherence Tomography

open access: yesSensors, 2023
Ultraviolet (UV) irradiation causes 90% of photodamage to skin and long-term exposure to UV irradiation is the largest threat to skin health. To study the mechanism of UV-induced photodamage and the repair of sunburnt skin, the key problem to solve is ...
Han Tang   +4 more
doaj   +2 more sources

Intrinsic indicator of photodamage during label-free multiphoton microscopy of cells and tissues.

open access: yesPLoS ONE, 2014
Multiphoton imaging has evolved as an indispensable tool in cell biology and holds prospects for clinical applications. When addressing endogenous signals such as coherent anti-Stokes Raman scattering (CARS) or second harmonic generation, it requires ...
Roberta Galli   +7 more
doaj   +2 more sources

Mechanism of Photodamage of the Oxygen Evolving Mn Cluster of Photosystem II by Excessive Light Energy [PDF]

open access: yesScientific Reports, 2017
Photodamage to Photosystem II (PSII) has been attributed either to excessive excitation of photosynthetic pigments or by direct of light absorption by Mn4CaO5 cluster.
Alonso Zavafer   +4 more
doaj   +4 more sources

Mitochondrial alternative oxidase pathway acts as an electron sink during photosynthetic induction in Rumex K-1 leaves

open access: yesPhotosynthetica, 2021
Chloroplast PSII photochemical efficiency is upregulated more rapidly than CO2 assimilation during photosynthesis induction, suggesting the existence of other electron sinks than that of CO2 assimilation.
D.D. CHENG, L.T. ZHANG
doaj   +1 more source

Photosystems under high light stress: throwing light on mechanism and adaptation

open access: yesPhotosynthetica, 2023
High light stress decreases the photosynthetic rate in plants due to photooxidative damage to photosynthetic apparatus, photoinhibition of PSII, and/or damage to PSI.
N. SHARMA   +7 more
doaj   +1 more source

Cross-sectional study on clinical profile and quality of life of individuals with occulocutaneous albinism in Lagos, Nigeria

open access: yesPigment International, 2023
Introduction: Albinism is a genetic disorder of pigmentation with variable phenotypic presentations. Albinism occurs all over the world, with highest prevalence in sub-Saharan Africa.
Olusola O Ayanlowo   +5 more
doaj   +1 more source

A photonumeric scale for the assessment of atrophic facial photodamage [PDF]

open access: yes, 2018
BACKGROUND: Photonumeric scales have consistently shown superiority over descriptive equivalents. They have the advantage of providing a consistent visual frame of reference by minimising variability in perception and subjectivity.
Ayer, J   +13 more
core   +1 more source

Trade-offs to win-win:Smart-fluorescence imaging for improved image quality with reduced photodamage [PDF]

open access: yes, 2017
Bio-imaging using fluorescence microscopy is widely used for the study and visualization of biological processes with a high degree of specificity. However, the illumination used for fluorescence imaging can be invasive enough to affect the imaging ...
Krishnaswami, V.
core   +5 more sources

Special issue in honour of Prof. Reto J. Strasser - Analysis of OJIP transients during photoinactivation of photosystem II indicates the presence of multiple photosensitizers in vivo and in vitro

open access: yesPhotosynthetica, 2020
Generally, excessive excitation absorbed by the pigments is considered the cause of PSII photodamage. Previous studies of action spectra of PSII photodamage concluded that shorter wavelengths induce more damage, supporting the hypothesis of the existence
I. IERMAK, M. SZABÓ, A. ZAVAFER
doaj   +1 more source

Hydrogen sulfide protects retina from blue light-induced photodamage and degeneration via inhibiting ROS-mediated ER stress-CHOP apoptosis signal

open access: yesRedox Report, 2022
Background: Hydrogen sulfide (H2S) is a small reducing gas molecule with various biological functions such as anti-oxidative, anti-apoptotic and anti-inflammatory activities.
Sen Zhu   +6 more
doaj   +1 more source

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