Results 171 to 180 of about 3,753,947 (257)

Structural valve deterioration is primarily caused by cyclic fatigue but not immune rejection. [PDF]

Front Immunol
Kostyunin AE, Glushkova TV, Ovcharenko EA, Onischenko PS, Klyshnikov KY, Akentieva TN, Bogdanov LA, Koshelev VA, Stasev AN, Khromov AA, Kutikhin AG.   +10 more
europepmc   +1 more source

Mid-term assessment of structural valve deterioration of perceval S sutureless prosthesis using the last European consensus definition. [PDF]

Interact Cardiovasc Thorac Surg, 2021
Martínez-Comendador JM, Estevez-Cid F, González Barbeito M, Velasco García De Sierra C, Bouzas Mosquera A, Barbeito C, Cuenca Castillo J, Herrera-Noreña J.   +7 more
europepmc   +1 more source

Impact of A‐Site Sr Substitution in LaFeO3 on Syngas Selectivity During Chemical Looping Dry Reforming of Methane (CL‐DRM)

Chemistry – A European Journal, EarlyView.
Sr doping regulates oxygen exchange and methane activation in LaFeO3, suppressing nonselective CH4 cracking and coke formation during CL‐DRM. La0.7Sr0.3FeO3 provides the optimal balance, delivering ∼40% CH4 conversion, an H2/CO ratio of 2, and >95% carbon balance.
Ganesh Jabotra, Pradeep Kumar Yadav, Lorenzo Stievano, Moulay Tahar Sougrati, Hervé Vezin, Axel Löfberg, Sébastien Royer, Sudhanshu Sharma, Jean‐Philippe Dacquin   +8 more
wiley   +1 more source

Impact of Trace Water on the Macroscopic Activity of Commercial Ammonia Cracking Catalysts Under Process‐Relevant Conditions

Chemie Ingenieur Technik, EarlyView.
This study evaluates how small water impurities—typical in ammonia cracking feedstock—affect catalyst performance at elevated pressures and temperatures. By decoupling permanent degradation from reversible inhibition, the findings highlight trace water as a significant factor for reliable catalyst screening and industrial ammonia cracking scale‐up ...
Bruno V. P. Lago, Sebastian Wodak, Marianne Ponceau, Axel Behrens, Jan‐Peter Bohn, Sebastian Rehfeldt, Harald Klein   +6 more
wiley   +1 more source

Comparing porcine versus bovine mitral valve replacement in terms of structural valve deterioration: a systematic review. [PDF]

J Cardiothorac Surg
Kajitani S, Chorney W, Albakri A, Kmieciak K, Mthethwa M, Ho M, Goodings A, Harada H, Rabkin D, Kajitani M.   +9 more
europepmc   +1 more source

Structural Valve Deterioration After Self-Expanding Transcatheter or Surgical Aortic Valve Implantation in Patients at Intermediate or High Risk.

JAMA Cardiol, 2023
O'Hair D, Yakubov SJ, Grubb KJ, Oh JK, Ito S, Deeb GM, Van Mieghem NM, Adams DH, Bajwa T, Kleiman NS, Chetcuti S, Søndergaard L, Gada H, Mumtaz M, Heiser J, Merhi WM, Petrossian G, Robinson N, Tang GHL, Rovin JD, Little SH, Jain R, Verdoliva S, Hanson T, Li S, Popma JJ, Reardon MJ.   +26 more
europepmc   +1 more source

Evaluation of Pervaporation and Nanofiltration Membranes for Water Recovery From Thermo‐Responsive Draw Solution

Chemie Ingenieur Technik, EarlyView.
Integrating thermo‐responsive draw solutions with suitable water‐recovery technologies could enable more efficient hybrid desalination. This study compares pervaporation and nanofiltration, revealing key trade‐offs between water productivity and polymer retention and providing guidance for future FO‐based brine treatment systems.
Nadin Al‐Jariry, Malwin Uthleb, Ibrahim M. A. ElSherbiny, Hannes Richter, Liang Yu, Frank Lipnizki, Josefine Enman, Annelie Hedström, Marcus Weyd, Jonas Hedlund   +9 more
wiley   +1 more source

Comparative analysis of structural valve deterioration and long-term clinical outcomes after bovine pericardial versus porcine bioprosthetic mitral valve replacement. [PDF]

J Thorac Dis, 2021
Kim W, Hwang HY, Kang Y, Kim JS, Sohn SH, Choi JW, Kim KH.   +6 more
europepmc   +1 more source

A Safety Valve for Emissions Trading [PDF]

This paper considers the optimal design of an emissions trading program that includes a safety valve tax that allows pollution sources to escape the emissions cap imposed by the aggregate supply of emissions permits.
John Stranlund
core  

Experimental methods in chemical engineering: Temperature‐programmed oxidation—TPO

The Canadian Journal of Chemical Engineering, EarlyView.
Abstract Temperature‐programmed oxidation (TPO) probes the oxidative capacity and redox properties of solid materials—catalysts, metal oxides, perovskites, and carbonaceous deposits. It identifies coke type, distribution, and reactivity. TPO instruments pass an oxidizing gas (diluted O2$$ {\mathrm{O}}_2 $$, air, or less commonly N2O$$ {\mathrm{N}}_2 ...
Gholamreza Roohollahi, Jildimara de Jesus Santana, Alexander R. P. Harrison, Sara Andreoli, Ewa Marek, Stuart Scott, Mohammad Latifi, Gregory S. Patience   +7 more
wiley   +1 more source