Results 141 to 150 of about 295,204 (387)

Armoring Boron Nitride with Pyrolytic Carbon Layers for Tunable Rigidity and Flexibility

open access: yesAdvanced Science, EarlyView.
By precisely controlling the thickness of the PyC armor, the BN@PyC aerogel achieves a remarkable transformation in mechanical properties, spanning multiple orders of magnitude from flexibility to rigidity, while simultaneously exhibiting versatility, including elastic responsive conductivity, enhanced thermal conductivity, and outstanding ablative ...
Meng Lan   +5 more
wiley   +1 more source

Determination of the Experimental Minimal Formula of Metal‐Organic Frameworks

open access: yesAdvanced Science, EarlyView.
We present a simple yet rigorous method to determine the precise chemical composition of metal‐organic frameworks using Nuclear Magnetic Resonance (NMR), Thermogravimetric Analaysis (TGA), and ultraviolet‐visible (UV‐vis) spectroscopy. This approach reveals overlooked inorganic ligands and provides accurate experimental molar masses, enhancing ...
Jikson Pulparayil Mathew   +5 more
wiley   +1 more source

Combustion Test for the Smallest Reciprocating Piston Internal Combustion Engine with HCCI on the Millimeter Scale

open access: yesApplied Sciences
Micro reciprocating piston internal combustion engines are potentially desirable for high-energy density micro power sources. However, complex subsystem functions hinder the downsizing of reciprocating piston internal combustion engines.
Huichao Shang   +5 more
doaj   +1 more source

Ultrasound‐Assisted for Super‐Rapid and High‐Efficient Adsorption and Desorption

open access: yesAdvanced Science, EarlyView.
Adsorption–desorption technologies face challenges due to slow adsorption and complex regeneration. This study shows that PVDF‐HFP offers exceptional adsorption kinetics and regeneration efficiency under ultrasound, adsorbs Rhodamine B 23,000 times faster than activated carbon, removing 90% of levofloxacin and PFOA in 5 min, and maintains performance ...
Yijun Han   +9 more
wiley   +1 more source

Microanalysis of Worn Surfaces of Selected Rotating Parts of an Internal Combustion Engine. [PDF]

open access: yesMaterials (Basel), 2021
Bernát R   +5 more
europepmc   +1 more source

Hypersonic ramjet experiment project. Phase 1: Computer program description, ramjet and scramjet cycle performance [PDF]

open access: yes
A computer program was developed to describe the performance of ramjet and scramjet cycles. The program performs one dimensional calculations of the equilibrium, real-gas internal flow properties of the engine. The program can be used for the following: (
Jackson, R. J., Wang, T. T.
core   +1 more source

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