Results 31 to 40 of about 23,768 (295)

Process and properties of rhenium powders prepared by hydrogen reduction

open access: yesFenmo yejin jishu
Rhenium powders are prepared by hydrogen reduction in tubular push-boat furnace, using ammonium perrhenate as the raw materials. The effects of ammonium perrhenate particle size, reduction temperature, hydrogen flow rate, and boat loading amount on the ...
LI Caobing   +3 more
doaj   +1 more source

Dynamic Processes of Rhenium Polyhydride Complexes

open access: yesMolecules, 2022
Studies have demonstrated that high-coordination-number rhenium polyhydride complexes are precursors to catalysts that transform a variety of organic molecules. While rhenium polyhydride complexes lead to active catalysts, little has been reported on the
Datta V. Naik, Gregory A. Moehring
doaj   +1 more source

Rhenium-Metalated Polypyridine-Based Porous Polycarbazoles for Visible-Light CO2 Photoreduction

open access: yes, 2019
Transformation of CO2 into valuable chemicals and especially fuels is deemed as a promising approach to reduce our dependence on fossil fuels and to alleviate climate change.
Tian-Xiong Wang (6559796)   +13 more
core   +1 more source

Understanding and Mitigating the Risk of Accelerated Biological Aging in Survivors of Cancer: A Scoping Review

open access: yesAging and Cancer, EarlyView.
Cancer treatment is associated with measurable acceleration of biological aging across epigenetic, telomere, senescence, and immune biomarkers. However, biomarker validation and interventional strategies remain limited, especially in hematologic malignancies, underscoring the need for standardized multi‐omic aging assessments and adequately powered ...
Moataz Ellithi   +3 more
wiley   +1 more source

Research progress on separation and extraction of rhenium from copper waste acid

open access: yes工程科学学报
Rhenium is a strategic metal that plays a crucial role in the military, aerospace, and aviation fields. Its unique properties have become an indispensable material in aerospace engines.
Jinxi QIAO   +4 more
doaj   +1 more source

Rhenium-Catalyzed Phthalide Synthesis from Benzamides and Aldehydes via C–H Bond Activation

open access: yes, 2019
The [4 + 1] annulation of benzamides and aldehydes for phthalide synthesis was achieved via rhenium-catalyzed C–H activation, which demonstrates an unprecedented reaction pattern distinct from those of other transition-metal catalyses.
Yunhui Yang (1666312)   +4 more
core   +1 more source

Clinical Validation of Artificial Intelligence (AI)‐based Cartilage Segmentation Predicting Knee Replacement

open access: yesArthritis Care &Research, Accepted Article.
Objective For cartilage morphology to serve as a scalable endpoint in clinical trials, analyses should be performed automatically without human interaction. To clinically validate artificial intelligence (AI)‐based analysis, we studied cartilage loss from MRI prior to knee replacement.
Felix Eckstein   +3 more
wiley   +1 more source

The Chemistry of Rhenium (V) Chloride [PDF]

open access: yes, 1969
Reactions of rhenium(V) chloride with triphenylphosphine, triphenylphosphine oxide, and pyridine were investigated, using various solvents. It was found that both the amount of water present and the age of the rhenium(V) chloride played important roles ...
Eastland, George Warren
core   +1 more source

Unsupervised Machine Learning Identifies Shared Biomechanical and Clinical Variation in Individuals with Knee Osteoarthritis and High BMI: A Secondary Analysis of the IDEA Trial

open access: yesArthritis Care &Research, Accepted Article.
Objective High body mass index (BMI≥27 kg/m2) and aberrant gait biomechanics are primary risk factors for knee osteoarthritis (KOA), yet the specific loading patterns linked to clinical disease features remain unclear. Unsupervised machine learning (ML) was used to identify vertical ground reaction force (vGRF) waveform modes of variation and ...
Ashley N. Buck   +10 more
wiley   +1 more source

Study of the influence of pulse heating on the structure and properties of reinforcing fibers from tungsten-rhenium alloys

open access: yesJournal of Alloys and Metallurgical Systems
Improvement of the design of modern heat engines is characterized by expanding the use of heat-resistant fiber composites. The component that largely determines the strength and technological properties of the composite is the fibers.
V. Shalomeev   +5 more
doaj   +1 more source

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