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In-Situ Dynamic Carburization of Mo Oxide with Unprecedented High CO Formation Rate in Reverse Water-Gas Shift Reaction.
Angew Chem Int Ed Engl
December 2024
State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, iChEM, Chinese Academy of Sciences, Dalian, 116023, China.
In situ construction of active structure under reaction conditions is highly desired but still remains challenging in many important catalytic processes. Herein, we observe structural evolution of molybdenum oxide (MoO) into highly active molybdenum carbide (MoC) during reverse water-gas shift (RWGS) reaction. Surface oxygen atoms in various Mo-based catalysts are removed in H-containing atmospheres and then carbon atoms can accumulate on surface to form MoC phase with the RWGS reaction going on, both of which are enhanced by the presence of intercalated H species or Pt-dopants in MoO.
View Article and Find Full Text PDFVitamin D levels in couples undergoing in vitro fertilization treatment: lack of association with embryo quality or pregnancy rates.
Fertil Steril
November 2024
Translational Endocrinology Lab of the Carlos Chagas Filho Biophysics Institute, Federal University of Rio de Janeiro, Rio de Janeiro, Rio de Janeiro, Brazil.
Objective: To investigate the potential impact of vitamin D (VD) serum levels on couples going through in vitro fertilization treatment in terms of embryo quality and pregnancy rates.
Design: A retrospective cohort study.
Setting: A private human reproduction center.
Healthcare transformation journey in the Eastern Region of Saudi Arabia: an overview, challenges and lessons learned.
J Med Life
April 2023
College of Public Health, Imam Abdulrahman Bin Faisal University, Dammam, Saudi Arabia.
The Kingdom of Saudi Arabia has embarked on a transformation journey referred to as "Vision 2030", which commenced in June 2016. The healthcare sector is currently going through a radical transformation under this Vision. The new Model of Care shifts the focus of the healthcare sector towards proactive care and wellness, aiming to achieve better health, better care, and better value.
View Article and Find Full Text PDFCarbon K edge spectra of functionalized molybdenum-based MXenes, MoCT (T = F, OH and O), from first-principles calculations.
Micron
September 2023
Department of Physics, Lorestan University, Khoramabad, Islamic Republic of Iran.
In this study, the effect of the termination groups (T = F, OH, O) on the energy loss near edge structure (ELNES) of carbon K edge in MoC MXene at orientation-independent conditions has been investigated using first-principles calculations based on the full-potential linearized augmented plane wave (FP-LAPW) method. The results show that within the YS-PBE0 functional, the MoCF is a semiconductor with an indirect band gap of 0.723 eV.
View Article and Find Full Text PDFGoing the Extra Mile: Why Clinical Research in Cystic Fibrosis Must Include Children.
Children (Basel)
July 2022
Paediatric Respiratory Medicine Department, Royal Brompton Hospital, London SW3 6NP, UK.
This is an exciting time for research and novel drug development in cystic fibrosis. However, rarely has the adage, "Children are not just little adults" been more relevant. This article is divided into two main sections.
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