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An insight into recent PM aerosol light scattering properties and particle number concentration variabilities at the suburban site ATOLL in Northern France.
Sci Total Environ
January 2025
UMR 8518 Laboratoires d'Optique Atmosphérique, CNRS, Université de Lille, Lille 596 55, France.
Aerosol particles in the PM fraction considerably influence the climate-related effects of aerosols and impact human health despite representing very variable fractions of the total aerosol mass concentration. Aerosol optical measurement techniques (aerosol light scattering) may not be sufficiently effective for detecting all particles in the PM fraction, particularly regarding number concentration. The present study investigates temporal variations of aerosol light scattering properties and particle number concentration (PNC) at different size modes in the PM fraction at the atmospheric site ATOLL (The Atmospheric Observations in Lille), Northern France from January 2018 to February 2023.
View Article and Find Full Text PDFEffects of Gamma Irradiation on Structural, Chemical, Bioactivity and Biocompatibility Characteristics of Bioactive Glass-Polymer Composite Film.
J Biomed Mater Res A
January 2025
Department of Dental Science, Advanced Medical and Dental Institute, Universiti Sains Malaysia, Kepala Batas, Pulau Pinang, Malaysia.
Gamma irradiation is an effective technique for biocomposite films intended for application in tissue engineering (TE) to ensure sterility and patient safety prior to clinical applications. This study proposed a biocomposite film composed of natural polymer chitosan (CS) and synthetic polymer poly-Ɛ-caprolactone (PCL) reinforced with sol-gel-derived bioactive glass (BG) for potential application in TE. The BG/PCL/CS biocomposite film was sterilized using 25 kGy gamma rays, and subsequent changes in its characteristics were analyzed through mechanical and physical assessment, bioactivity evaluation via immersion in simulated body fluid (SBF) and biocompatibility examination using human primary dermal fibroblasts (HPDFs).
View Article and Find Full Text PDFDimethyl labeling of N-terminal amines allows unambiguous identification of protein crosslinks.
Free Radic Biol Med
February 2025
Dept. of Biomedical Sciences, University of Copenhagen, Copenhagen, Denmark. Electronic address:
Article Synopsis
- Protein crosslinks caused by oxidative stress are linked to diseases like atherosclerosis, Alzheimer's, and Parkinson's, but their specific nature and locations in proteins remain unclear.
- A new method utilizing "light" and "heavy" isotope-labeled reagents for efficient amine labeling of crosslinked peptides has shown improved identification and quantification over previous techniques.
- This approach has led to the successful identification of novel crosslinks in proteins like β-casein and α-synuclein, as well as effective mapping of disulfide bonds in serum albumin, highlighting its versatility for studying protein modifications.
The influence of pH on the liquid-phase transformation of phenolic compounds driven by nitrite photolysis: Implications for characteristics, products and cytotoxicity.
Sci Total Environ
December 2024
Department of Chemistry, Capital Normal University, Beijing 100048, China. Electronic address:
The aqueous-phase conversion of phenolic compounds (PhCs) driven by nitrite photolysis has been recognized as a significant source of secondary brown carbon (BrC). However, the influence of pH on the conversion kinetics and product distribution of PhCs remains unclear. In this study, three representative PhCs with varying functional groups were selected to examine their aqueous-phase conversion kinetics in the presence of nitrite under different pH conditions and simulated sunlight conditions.
View Article and Find Full Text PDFResponse of Native and Non-Native Subarctic Plant Species to Continuous Illumination by Natural and Artificial Light.
Plants (Basel)
September 2024
Institute of Biology, Karelian Research Center, Russian Academy of Sciences, Petrozavodsk 185910, Russia.
Article Synopsis
- - The study investigates how continuous lighting (CL) affects plant physiology and photosynthesis, considering if effects vary with light source (natural vs. artificial) and if they differ between native and non-native plants in the subarctic.
- - Experiments included various light conditions on three native and three non-native plant species in the Polar-Alpine Botanic Garden, measuring their responses during peak summer and under controlled climate chamber settings.
- - Results indicate that plants do not have specific defense mechanisms against CL; they experience oxidative stress-related leaf injuries under artificial CL conditions, while in their natural environment, they manage to avoid damage by maintaining endogenous rhythms through fluctuating environmental factors.
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