Results 21 to 30 of about 1,957,002 (173)

Synthesis of Amides from Amines and Esters Under Hydrothermal Conditions. [PDF]

ChemistryOpen
In this study, we explore the amide synthesis under hydrothermal conditions, using amines and esters as the starting materials. Proposed major pathway starts with ester hydrolysis, followed by condensation between carboxylic acids and amines. The amide yield is dependent on the substrate structure, solution pH, and the presence of dissolved metal salts.
Brown PA, Aspin A, Yang Z.
europepmc   +2 more sources

Efficient Oxyhydrogen Mixture Determination In Gas Detonation Forming

, 2013
{"references": ["D.J. Mynors, B. Zhang, \"Application and capabilities of explosive\nforming,\" J. Mater Process Technol., 125, pp. 1-25, 2002.", "H.M. Wen, T.Y. Reddy, S.R. Reid, \"Deformation and failure of clamped\nbeams under low speed impact loading,\" Int. J. Impact Eng., 16, pp.\n435-454, 1995.", "M. Khaleghi Meybodi, H. Bisadi, \"Gas Detonation
Khaleghi, Morteza, Aghazadeh, Babak Seyed, Bisadi, Hosein   +2 more
openaire   +3 more sources

Optimization of a wet-cell electrolyzer for efficient oxyhydrogen (HHO) gas production: a step towards sustainable green energy solutions [PDF]

Scientific Reports
The urgent need for sustainable energy solutions drives innovation in clean fuel technologies. Oxyhydrogen (HHO) gas, produced through water electrolysis, presents a promising green energy vector.
Nouralddin H. A. Fayez, Mohamed Qenawy, Hassan M. M. Mustafa, Mohamed Shehadeh, Mohamed Taha, A. H. Abdelbaky Elbatran   +5 more
doaj   +2 more sources

Transformation of a Silicate Material for Carbon Negative Magnesia-Based Cement via Electrochemistry. [PDF]

Adv Sci (Weinh)
The transformation of a magnesium trisilicate material via water electrolysis into precursor phases necessary for magnesium‐based M‐S‐H cement is explored. The dissolution of the material mediated electrochemically is monitored, and the analysis of the resulting phases indicate their suitability as effective precursors for M‐S‐H cement.
Ramuglia AR, Scheel J, Köberle T, Henze K, Paasch S, Lima Duarte L, Kaskel S, Brunner E, Mechtcherine V, Matschei T, Weidinger IM, Liebscher M.   +11 more
europepmc   +2 more sources

In Situ X-ray Diffraction Studies on the Reduction of U₃O₈ by Various Reducing Agents. [PDF]

Chemistry
The reduction of U₃O₈ by hydrogen, PVDF, and CaH₂ is investigated using continuous in situ X‐ray diffraction. Phase transitions, oxygen loss, and intermediate structures are analyzed. The study elucidates how different reducing environments influence reaction pathways and final products, offering new insight into uranium oxide chemistry relevant to ...
Michak M, Ideker FC, Kohlmann H.
europepmc   +2 more sources

Fundamentals of Thermal Transport and Energy Conversion in Ultra-High Temperature Ceramics: From Microscale Mechanisms to Macroscopic Properties. [PDF]

Adv Sci (Weinh)
This review critically examines thermal transport and radiative properties of ultra‐high temperature ceramics for hypersonic flight, advanced nuclear systems, and next‐generation energy conversion devices. It explores phonon–photon–electron interactions, microstructural engineering, thermoelectric conversion, and machine learning‐accelerated multiscale
Pei Z, Li Y, Xing J, Zhu Y, Zhang R, Wu H, Qin Z, Pei G, Li M.   +8 more
europepmc   +2 more sources

Technology of Powder Coatings Application by Gas-Flame Spraying Using Oxyhydrogen Flame

Materials Science Forum, 2017
In the article the equipment, method and the results of researches of strength of gas-flame coatings cohesion with the base are presented. The dependence of adhesive strength on spraying modes of powder material by oxyhydrogen flame is established and described. Recommendations on choosing the gas-flame spraying modes are developed.
G. Barsukov, V.V. Barabash, A.Yu. Rodichev, O. Kozhus   +3 more
openaire   +2 more sources

Deterministic Fabrication of Plasmonic Nanostructures on Optical Nanofibers via Blurred Electron Beam Deposition. [PDF]

Adv Sci (Weinh)
A nanofabrication method enabling the direct growth of plasmonic nanostructures are presented on suspended tapered optical nanofibers via Blurred Electron Beam Induced Deposition (BEBID). By defocusing the beam to reduce mechanical stress, BEBID achieves sub‐20 nm precision and structural control, enabling directional scattering and light–matter ...
Balena A, D'Amato M, Kashif MF, Ding C, Belzane L, De Marzo G, Le Jeannic H, De Vittorio M, Pisanello F, Bramati A.   +9 more
europepmc   +2 more sources

Impact of produced oxyhydrogen gas (HHO) from dry cell electrolyzer on spark ignition engine characteristics [PDF]

International Journal of Hydrogen Energy
In the current study, an onboard dry cell electrolyzer was built to produce an oxyhydrogen (HHO) flow rate of 0.5 L/min by water electrolysis. The objective is to show the impact of oxyhydrogen introduction on engine exhaust gases, combustion characteristics, and engine performance related to gasoline.
M.S. Gad, A.S. El-Shafay, Ümit Ağbulut, Hitesh Panchal   +3 more
openaire   +3 more sources

Stability and performance investigation using different electrode configurations and electrolyte compositions in an oxyhydrogen gas generator. [PDF]

RSC Adv
This study aimed to develop an efficient HHO generator with higher gas production, enhanced electrodes, and stable current density.
Mughal W, Ji P, Rauf U, Junping L, Waheed A, Kumar P.   +5 more
europepmc   +3 more sources