Results 71 to 80 of about 6,660 (151)

NASA Tech Briefs Index, 1977, volume 2, numbers 1-4 [PDF]

Announcements of new technology derived from the research and development activities of NASA are presented. Abstracts, and indexes for subject, personal author, originating center, and Tech Brief number are presented for ...

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Tailoring Thermophysical Properties and Multiscale Machine Learning Modeling of 2D Nanomaterial‐Infused Beeswax as a Green NePCM for Sustainable Thermal Management Systems

ENERGY &ENVIRONMENTAL MATERIALS, Volume 9, Issue 3, May 2026.
This study develops eco‐friendly two‐dimensional nanoparticle‐enhanced phase change materials (2D NePCMs) using biodegradable beeswax infused with rGO, GO, and MXene nanoparticles. Experimental results demonstrated up to 21.9% enhancement in thermal conductivity with minimal latent heat loss, while machine learning models achieved >95% predictive ...
Abdullah Aziz, Shoaib Anwer, Eiyad Abu‐Nada, Anas Alazzam   +3 more
wiley   +1 more source

Synergetic Effect of Silicate Addition on Modifying Zincate Solvation and Regulating ZnO Formation Revealed by In Situ Raman Observation during Zn Discharging

ENERGY &ENVIRONMENTAL MATERIALS, Volume 9, Issue 3, May 2026.
A practical and synergetic interfacial engineering strategy via silicate addition to modulate the Zn passivation issue for developing rechargeable Zn batteries is introduced. Zn offers higher safety and lower material cost over Li, making it promising alternative anode material for secondary batteries and grid‐scale sustainable energy storage ...
Tanyanyu Wang, Masahiro Kunimoto, Kyoichiro Yokota, Takayuki Homma   +3 more
wiley   +1 more source

Atomically Dispersed Cobalt on Ionic Carbon Nitrides for Selective and Efficient Nitrate Electroreduction to Ammonia

Angewandte Chemie, Volume 138, Issue 16, 13 April 2026.
By exploiting the structural benefits of PHI, we synthesized CoPHI with atomically dispersed cobalt sites at high density. This architecture enables efficient nitrate ion adsorption, promotes water dissociation, and enhances *H generation on the catalyst surface, thereby significantly improving electrochemical nitrate reduction performance.
Nana Gao, Minjuan Guo, Haijian Tong, Guoyu Hou, Jingwen Ba, Xiaoyu Zhang, Ruixin Zhang, Hui Zhang, Xianwei Fu, Leonardo Cancellara, Nadezda V. Tarakina, Yu Zhang, Tianxi Liu, Christian Mark Pelicano, Zhihong Tian   +14 more
wiley   +2 more sources

The GUINEVERE Project for Accelerator Driven System Physics

, 2009
paper 9414International audienceThe GUINEVERE project is part of the EUROTRANS Integrated Project of the 6th EURATOM Framework Programme. It is mainly devoted to ADS on-line reactivity monitoring validation, sub-criticality determination and operational ...
Aït Abderrahim, H., Baeten, P., Ban, G., Baylac, Maud, Bergmans, G., Billebaud, A., Bondoux, D., Bouvier, J., Chabod, S., de Conto, J.M., Dessagne, P., Gaudiot, G., Gautier, J.M., Granget, G., Heitz, G., Kerveno, M., Kochetkov, A., Laune, B., Lecolley, F.R., Lecouey, J.L., Marie, Nathalie, Mellier, F., Merrer, Y., Nuttin, A., Reynet, D., Steckmeyer, J.C., Uyttenhove, W., Vandeplassche, D., Vermeersch, F., Vittiglio, G.   +29 more
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Dental composites: a comprehensive review on formulation, properties and recent developments

Polymer International, Volume 75, Issue 5, Page 365-386, May 2026.
Dental composites are essential in modern restorative dentistry; this review covers their development, composition, key properties and recent advances, highlighting new technologies for optimizing materials and improving clinical outcomes. Abstract Dental composites have evolved considerably since their introduction, becoming the cornerstone of modern ...
Rayenne Latoui, Djallel Bouzid, Olivier Boyron   +2 more
wiley   +1 more source

The Reactivity of Bispidine Ligand Based Iron(IV) and Iron(V) Oxido Species for the Demethylation of Acetic Acid

Journal of Computational Chemistry, Volume 47, Issue 11, 30 April 2026.
In agreement with experiment, DFT shows that high‐valent iron bispidines readily react with acetic acid by HAA (hydrogen atom abstraction) to produce C1 products in various oxidation states. ABSTRACT The high valent bispidine iron‐oxido complexes LFeIV═O and LFeV═O show exceptionally high reactivity for C–H abstraction reactions.
Gunasekaran Velmurugan, Peter Comba
wiley   +1 more source

Synthetic Implications of Spin States in the Reactivity of Ni Intermediate Complexes in Coupling Reactions

European Journal of Organic Chemistry, Volume 29, Issue 16, 25 April 2026.
The formation of triplet Ni(II) complexes by activation of bromoalkenes with alkyl‐ or boryl Ni(I) is key to control the outcome of the reductive cross‐coupling of bromoalkanes precluding the formation of alkylboronates. We present a mechanistic study on the Ni‐catalyzed cross‐coupling reaction of bromoalkanes with diboron compounds as reductants.
Diego J. Cárdenas
wiley   +1 more source

Enantioselectivity in Transition Metal Catalyzed Propargylic Substitution Reactions: A Theoretical Perspective

Chemistry – A European Journal, Volume 32, Issue 15, 22 April 2026.
Recent theoretical efforts to elucidate the origin of enantioselectivity in transition metal‐catalyzed propargylic substitution reactions are highlighted in this review. ABSTRACT In recent years, asymmetric catalytic propargylic substitution reactions have undergone remarkable development, enabling the construction of chiral carbon centers adjacent to ...
Ken Sakata, Yoshiaki Nishibayashi
wiley   +1 more source

From Mechanisms to Materials: Oximate Reactivity and Emerging Strategies for Organophosphate Detoxification

ChemPhysChem, Volume 27, Issue 7, 14 April 2026.
The development of effective strategies for the detoxification of organophosphorus (OP) nerve agents has evolved from the early mechanistic studies of François Terrier and collaborators, who first elucidated the exceptional nucleophilicity of α‐effect species such as oximes and hydroxamates, to the modern design of supramolecular and material‐based ...
Pedro Rodríguez‐Dafonte
wiley   +1 more source