In a recent issue of Nature, Barends et al. studied the photodissociation of carboxymyoglobin with ultrafast laser pump-probe serial femtosecond crystallography experiments. They observed significant differences in heme protein structural dynamics for biologically relevant 1-photon excitation relative to high excitation leading to the absorption of several photons per heme.
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http://dx.doi.org/10.1016/j.str.2024.05.008 | DOI Listing |
Ital J Pediatr
January 2025
High Institute of Public Health, Alexandria University, Alexandria, Egypt.
Background: Attention-Deficit Hyperactivity Disorder (ADHD) is a complex disease that negatively impacts the social and academic/occupational activities of children and is more common in boys than in girls.
Methods: This case-control study aimed to assess the association between some environmental risk factors and ADHD among children in Alexandria, Egypt. It was carried out at the outpatient clinics of El Shatby Pediatric University Hospital in Alexandria, Egypt, with 252 children (126 cases and 126 controls).
Nat Commun
September 2024
State Key Laboratory of Hydraulics and Mountain River Engineering, College of Architecture and Environment, Sichuan University, Chengdu, China.
Actualizing efficient and sustainable environmental catalysis is essential in global water pollution control. The single-atom Fenton-like process, as a promising technique, suffers from reducing potential environmental impacts of single-atom catalysts (SACs) synthesis and modulating functionalized species beyond the first coordination shell. Herein, we devised a high-performance SAC possessing impressive Fenton-like reactivity and extended stability by constructing abundant intrinsic topological defects within carbon planes anchored with Fe-N sites.
View Article and Find Full Text PDFSpectrochim Acta A Mol Biomol Spectrosc
November 2024
Chemistry Department, Faculty of Science, Damietta University, 34511 Damietta, Egypt. Electronic address:
There is an urgent requirement for the development of sensitive and quick sensors to monitor chromium (VI) due to its substantial carcinogenic and mutagenic properties. A coexisting system of coumarin 334 and diphenylcarbazide (C334/DPC) was used in this study as a fluorescent chemosensor to detect Cr(VI) ions. Upon the addition of Cr(VI), a purple chelate complex (Cr(III)-diphenylcarbazone) was produced, which resulted from the quantitative reaction between Cr(VI) ions and diphenylcarbazide (DPC), whereas no interaction between Cr(VI) and coumarin 334 took place.
View Article and Find Full Text PDFStructure
June 2024
Departments of Chemistry and Physics, University of Toronto, Toronto, ON M5S 3H6, Canada. Electronic address:
In a recent issue of Nature, Barends et al. studied the photodissociation of carboxymyoglobin with ultrafast laser pump-probe serial femtosecond crystallography experiments. They observed significant differences in heme protein structural dynamics for biologically relevant 1-photon excitation relative to high excitation leading to the absorption of several photons per heme.
View Article and Find Full Text PDFBMJ Open Respir Res
May 2024
School of Pharmacy, The University of Auckland Faculty of Medical and Health Sciences, Auckland, Region, New Zealand.
Introduction: Asthma attacks are a leading cause of morbidity and mortality but are preventable in most if detected and treated promptly. However, the changes that occur physiologically and behaviourally in the days and weeks preceding an attack are not always recognised, highlighting a potential role for technology. The aim of this study 'DIGIPREDICT' is to identify early digital markers of asthma attacks using sensors embedded in smart devices including watches and inhalers, and leverage health and environmental datasets and artificial intelligence, to develop a risk prediction model to provide an early, personalised warning of asthma attacks.
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