Results 81 to 90 of about 2,186,410 (361)

Effective and Practical Stereoselective Synthesis of Nutlins Precursors by Immobilization of Privileged Chiral Mono‐Amidine Catalyst

Advanced Synthesis &Catalysis, EarlyView.
Abstract A strategy for the immobilization of Johnston's Mono(AMidine) catalyst (MAM) onto polystyrene, silica and hybrid silica‐polystyrene nanoparticles is presented. The catalyst activity was evaluated in the stereoselective aza‐Henry reaction leading to the pivotal β‐amino nitroalkane precursors of the anti‐cancer agents Nutlins (with Nutlin‐3a as ...
Sofia Toldo, Lorenzo Poletti, Graziano Di Carmine, Olga Bortolini, Carmela De Risi, Simona Felletti, Greta Compagnin, Alessandro Massi, Daniele Ragno   +8 more
wiley   +1 more source

Enantioselective CE–MS analysis of ketamine metabolites in urine

ELECTROPHORESIS, Volume 44, Issue 1-2, Page 125-134, January 2023., 2023
Abstract The chiral drug ketamine has long‐lasting antidepressant effects with a fast onset and is also suitable to treat patients with therapy‐resistant depression. The metabolite hydroxynorketamine (HNK) plays an important role in the antidepressant mechanism of action.
Friederike A. Sandbaumhüter, Jordan T. Aerts, Regula Theurillat, Per E. Andrén, Wolfgang Thormann, Erik T. Jansson   +5 more
wiley   +1 more source

Acoustic Rayleigh Wave Turbulence in Soft Viscoelastic Matter

Advanced Science, EarlyView.
Discrete acoustic Rayleigh wave turbulence (DARWT) is observed on the free surface of viscoelastic materials under monochromatic excitation. Governed by bulk shear rigidity supporting inertial modes against surface tension, the nonlinear Rayleigh waves exhibit distinct power‐law scaling and turbulence features in their Kolmogorov–Zakharov spectra. This
Mikheil Kharbedia, Horacio López‐Menéndez, Basilio Javier García, Manuel G. Velarde, Francisco Monroy   +4 more
wiley   +1 more source

A review of current rate‐dependent phase transformations of lithium metal orthosilicate cathode materials for Li‐ion batteries

Electrochemical Science Advances, Volume 2, Issue 6, December 2022., 2022
Phase transformation of electrode materials must be understood to optimize Li‐ion battery (LIB) performance for practical applications. High capacity orthosilicate cathodes Li2MSiO4 are transformed to LiMSiO4 and subsequently to MSiO4 with various structures during delithiation, depending on the current rate (C‐rate) and M component.
Narinthorn Wiriya, Yutthanakon Kanaphan, Rattiya Hongtong, Songyoot Kaewmala, Jeffrey Nash, Wanwisa Limphirat, Sutham Srilomsak, Nantiya Thipthanaratchaphong, Nonglak Meethong   +8 more
wiley   +1 more source

Particle Formation by Supercritical Fluid Extraction and Expansion Process

The Scientific World Journal, 2013
Supercritical fluid extraction and expansion (SFEE) patented technology combines the advantages of both supercritical fluid extraction (SFE) and rapid expansion of supercritical solution (RESS) with on-line coupling, which makes the nanoparticle ...
Sujuan Pan, Junbo Zhou, Haiting Li, Can Quan   +3 more
doaj   +1 more source

Birch Bark Dry Extract by Supercritical Fluid Technology: Extract Characterisation and Use for Stabilisation of Semisolid Systems

Applied Sciences, 2017
Triterpene compounds like betulin, betulinic acid, erythrodiol, oleanolic acid and lupeol are known for many pharmacological effects. All these substances are found in the outer bark of birch.
Markus Armbruster, Mathias Mönckedieck, Regina Scherließ, Rolf Daniels, Martin A. Wahl   +4 more
doaj   +1 more source

Detailed simulation of LOX/GCH4 flame-vortex interaction in supercritical Taylor-Green flows with machine learning [PDF]

arXiv, 2023
Accurate and affordable simulation of supercritical reacting flow is of practical importance for developing advanced engine systems for liquid rockets, heavy-duty powertrains, and next-generation gas turbines. In this work, we present detailed numerical simulations of LOX/GCH4 flame-vortex interaction under supercritical conditions.
arxiv  

Structure‐Guided Engineering of a Versatile Urethanase Improves Its Polyurethane Depolymerization Activity

Advanced Science, EarlyView.
The crystal structures of UMG‐SP2, a metagenome‐derived urethanase that degrades polyurethane, have been solved at high resolution in both ligand‐free and ligand‐bound forms with an amidase inhibitor or a small carbamate. Structure‐guided engineering of UMG‐SP2 improves the understanding of polyurethane degradation mechanisms and generates enzyme ...
Zhishuai Li, Xu Han, Lin Cong, Parinita Singh, Pedro Paiva, Yannick Branson, Wenshuo Li, Yangyang Chen, Da'san M. M. Jaradat, Frank Lennartz, Thomas Bayer, Louis Schmidt, Ulrike Garscha, Song You, Pedro Alexandrino Fernandes, Maria João Ramos, Uwe T. Bornscheuer, Gert Weber, Ren Wei, Weidong Liu   +19 more
wiley   +1 more source

Exploration of agricultural residue ash as a solid green heterogeneous base catalyst for biodiesel production

Engineering Reports, Volume 5, Issue 1, January 2023., 2023
Transesterification of vegetable oils with homogeneous catalyst for biodiesel synthesis is considered to have a promising future, but it is nonrenewable and hazardous. High production cost, in terms of feedstock oil and catalyst acquisition is one of the major challenges facing the global commercialization of biodiesel.
Christopher Tunji Oloyede, Simeon Olatayo Jekayinfa, Abass Olanrewaju Alade, Oyetola Ogunkunle, Nsikak‐Abasi Ubohon Otung, Opeyeolu Timothy Laseinde   +5 more
wiley   +1 more source

Supercritical Extraction Techniques for Obtaining Biologically Active Substances from a Variety of Plant Byproducts

Foods
Supercritical fluid extraction (SFE) techniques have garnered significant attention as green and sustainable methods for obtaining biologically active substances from a diverse array of plant byproducts.
Filip Herzyk, Dorota Piłakowska-Pietras, Małgorzata Korzeniowska   +2 more
doaj   +1 more source