Results 61 to 70 of about 57,989 (308)
Consequences of Medium‐Pore Zeolite Constraints for Alkene Cracking—The Case of n‐Pentene
Angewandte Chemie, EarlyView.Alkene cracking in medium‐pore zeolites is governed by a balance of enthalpic and entropic effects. Intrinsic barriers are quantified and shown to be lower than for alkanes due to stabilization of carbenium‐ion‐like transition states. Confinement and extra‐framework aluminum modulate reactivity by tuning transition‐state energetics, providing a ...
Ruixue Zhao +4 more
wiley +2 more sources
Nuclear Engineering and Technology, 2014 It was discovered in a Korean PWR that an extensive number of very short and shallow cracks in the SG tubes were undetectable by eddy current in-service-inspection because of the masking effect of sludge deposits.
HANSUB CHUNG +4 more
doaj +1 more source
Advanced Science, EarlyView.A volcano‐inspired dual‐carbon aerogel featuring hierarchical conduits and an outer carbon‐fiber shell directs rapid water transport, confines heat, and enables directional salt migration. Radial temperature gradients in the conical structure trigger Marangoni‐driven edge‐localized salt crystallization while maintaining an unobstructed photothermal ...
Shuyue Feng +8 more
wiley +1 more source
Photocatalytic Transfer Hydrogenation Using Plastic Hydrolysates as Hydrogen Donor
Angewandte Chemie, EarlyView.Plastic waste is transformed into functional amines via solar‐driven transfer hydrogenation. Soluble monomers from acid hydrolysis of waste polymers serve as a hydrogen (electron/proton)donors in the selective reduction of nitroarenes using a visible light active photocatalyst consisting of cobalt promoted molybdenum disulfide integrated in cyanamide ...
Papa K. Kwarteng +2 more
wiley +2 more sources
Advanced Science, EarlyView.A high‐entropy air electrode material, Gd0.2Pr0.2Ba0.2Sr0.2Ca0.2FeO3−δ (GPBSCF), is developed for both solid oxide fuel cells and reversible protonic ceramic cells. Its enhanced activity stems from increased oxygen vacancies/holes. The stability improvement is attributed to lattice distortion, while thermal expansion reduction is synergistically due to
Ying Zhang +9 more
wiley +1 more source
Medical Waste Regulation: Recommendations for Cleaning Up the Mess [PDF]
, 1993 In many applications, design or analysis is performed over a finite frequency range of interest. The importance of the H2/robust H2 norm highlights the necessity of computing this norm accordingly.
Garulli, Andrea +4 more
core +1 more source
Recent Advances and Challenges in Ammonia‐Hydrogen Energy Conversion
Advanced Science, EarlyView.This work summarizes the latest progress of various catalytic methods in ammonia‐hydrogen energy conversion. The challenges and outlook of ammonia‐hydrogen energy conversion system are also emphasized. This work expects to build a blueprint of renewable and efficient ammonia‐hydrogen energy conversion systems under mild conditions.
Menghao Lv +6 more
wiley +1 more source
NASA Lewis H2-O2 MHD program [PDF]
Performance and power costs of H2-O2 combustion powered steam-MHD central power systems are estimated. Hydrogen gas is assumed to be transmitted by pipe from a remote coal gasifier into the city and converted to electricity in a steam MHD plant having an
Nichols, L. D., Seikel, G. R., Smith, M.
core +1 more source
Alaska Energy Statistics 1960-2011 Final Report [PDF]
, 2013 This twenty-sixth edition of the Alaska Energy Statistics reconciles energy data from public sources and makes that data more easily available to the public and stakeholders.
Fay, Ginny +2 more
core
Self‐Adhesive Conductive Elastomers for Gel‐Free Biopotential Recording
Advanced Electronic Materials, EarlyView.σPOMaC, a self‐adhesive conductive citrate elastomer incorporating PEDOT:PSS and DBSA, enables gel‐free biopotential electrodes with stable conductivity and intrinsic skin adhesion. The composite exhibits low resistivity (∼ 0.02 Ω·cm), robust electrical performance during repeated use, and reliable on‐body ECG acquisition comparable to Ag/AgCl ...
Kirstie M. K. Queener +7 more
wiley +1 more source