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Significant changes in the physicochemical properties of BC-containing particles during the cold season in Beijing.
J Environ Sci (China)
May 2025
State Key Joint Laboratory of Environmental Simulation and Pollution Control, International Joint Research Center for Atmospheric Research (IJRC), College of Environmental Sciences and Engineering, Peking University, Beijing 100871, China; Collaborative Innovation Center of Atmospheric Environment and Equipment Technology, Nanjing University of Information Science and Technology, Nanjing 210044, China. Electronic address:
The ambient air quality has improved significantly under strict emission controls in Beijing, China over the last decade. Black carbon (BC), as a short-lived climate forcer in ambient aerosols, profoundly impacts the air quality and climate. Previous studies have demonstrated a decline in the mass concentration of BC.
View Article and Find Full Text PDFUtility of smart watch in expediting diagnosis of cold drink-triggered atrial fibrillation: a case report.
Int J Emerg Med
October 2024
The Permanente Medical Group, Kaiser Permanente Northern California Division of Research, and the CREST Network, Pleasanton, California, USA.
Article Synopsis
- A middle-aged man experienced sudden palpitations and shortness of breath while drinking cold juice, prompting him to use his smart watch to detect rapid atrial fibrillation.
- The man's symptoms resolved by the time he got to the ER, and subsequent evaluations showed only normal sinus rhythm, making the smart watch crucial for diagnosis.
- This case highlights how smart watch technology can aid in identifying triggers for palpitation episodes, such as cold drinks, and suggests that avoiding these triggers can help reduce the recurrence of atrial fibrillation.
Synergistic effects of oxidative and acid stress on bacterial membranes of Escherichia coli and Staphylococcus simulans.
Commun Biol
September 2024
Membrane Biochemistry & Biophysics, Bijvoet Centre for Biomolecular Research, Department of Chemistry, Utrecht University, Utrecht, The Netherlands.
Oxidative stress in combination with acid stress has been shown to inactivate a wide spectrum of microorganisms, including multi-resistant bacteria. This occurs e.g.
View Article and Find Full Text PDFFunctional and spectroscopic approaches to determining thermal limitations of Rieske oxygenases.
Methods Enzymol
September 2024
Department of Chemistry and Biochemistry, Montana State University, Bozeman, MT, United States. Electronic address:
The biotechnological potential of Rieske Oxygenases (ROs) and their cognate reductases remains unmet, in part because these systems can be functionally short-lived. Here, we describe a set of experiments aimed at identifying both the functional and structural stability limitations of ROs, using terephthalate (TPA) dioxygenase (from Comamonas strain E6) as a model system. Successful expression and purification of a cofactor-complete, histidine-tagged TPA dioxygenase and reductase protein system requires induction with the Escherichia coli host at stationary phase as well as a chaperone inducing cold-shock and supplementation with additional iron, sulfur, and flavin.
View Article and Find Full Text PDFRESPIRATORY BURST OXIDASE HOMOLOG 5.1 regulates H3K4me3 deposition and transcription after cold priming in cucumber.
Plant Physiol
August 2024
State Key Laboratory of Vegetable Biobreeding, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing 100081, China.
Plants can maintain acquired cold tolerance for a long period after cold priming, even after the resumption of warmer temperatures. However, the transcriptional mechanisms active during the recovery period after cold priming remain unknown. Here, we found that in cucumber (Cucumis sativus), cold priming altered the Histone H3 lysine 4 trimethylation (H3K4me3) signal of sustainably-induced (memory) and non-sustainably-induced (NSI) genes during recovery.
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