نتایج جستجو برای: dynamic nmr

تعداد نتایج: 462263  

Journal: :Topics in current chemistry 2013
Ulrich L Günther

Nuclear magnetic resonance (NMR) spectroscopy is a broadly used analytical method with major applications in chemistry, biochemistry and medicine. Key applications include structural analysis of small molecules, metabolites, larger biomolecules such as proteins, RNA and DNA, and applications in material science. Magnetic resonance imaging (MRI), which is based on the same physical principles, i...

Journal: :Chemical Science 2023

The acetate ligand exchange with free acetic acid in [Zr 6 O 4 (OH) (O 2 CCH 3 ) 12 ] , used as a model of crosslink migration ]-based coordination vitrimers, has been thoroughly investigated by dynamic 1 H NMR and DFT calculations.

2010
K. R. Keshari M. Van Criekinge D. Vigneron J. Kurhanewicz

INTRODUCTION: To present, NMR-compatible bioreactors have been utilized as a platform to explore the metabolism of cells non-invasively. These systems have utilized standard 10–25mm coils to exploit filling factor and ease of construction [1-3]. For immortalized cell lines, densities on the order of 10 cells are achievable, requiring extensive cell culture, but this is nearly impossible to achi...

Journal: :journal of the iranian chemical research 0
mohammad hossein nasirtabrizi department of applied chemistry,ardabil branch, islamic azad university, ardabil, iran zeinab mohammadpoor ziaei department of applied chemistry,ardabil branch, islamic azad university, ardabil, iran aiyoub parchehbaf jadid department of applied chemistry,ardabil branch, islamic azad university, ardabil, iran

maleic anhydride (man) copolymers with methyl methacrylate(mma), ethyl methacrylate(ema), methyl acrylate(ma), ethyl acrylate (ea) and buthyl acrylate (ba) ( in a 1:1 mole ratio) were synthesized by free radical polymerizations method under vacuum -azobis(isobutironitrile)(aibn) as an initiator of reaction at 701c. the copolymer compositions were determined using related 1h nmr spectra techni...

Journal: :Nature chemical biology 2010
Larry R Masterson Cecilia Cheng Tao Yu Marco Tonelli Alexandr Kornev Susan S Taylor Gianluigi Veglia

Atomic resolution studies of protein kinases have traditionally been carried out in the inhibitory state, limiting our current knowledge on the mechanisms of substrate recognition and catalysis. Using NMR, X-ray crystallography and thermodynamic measurements, we analyzed the substrate recognition process of cAMP-dependent protein kinase (PKA), finding that entropy and protein dynamics play a pr...

Journal: :Proteomics 2005
Hsuan-Liang Liu Jyh-Ping Hsu

The major challenges in structural proteomics include identifying all the proteins on the genome-wide scale, determining their structure-function relationships, and outlining the precise three-dimensional structures of the proteins. Protein structures are typically determined by experimental approaches such as X-ray crystallography or nuclear magnetic resonance (NMR) spectroscopy. However, the ...

2012
Diganta Saikia Yu-Chi Pan Hsien-Ming Kao

Organic-inorganic hybrid electrolyte membranes based on poly(propylene glycol)-block-poly(ethylene glycol)-block-poly(propylene glycol) bis(2-aminopropyl ether) complexed with LiClO4 via the co-condensation of tetraethoxysilane (TEOS) and 3-(triethoxysilyl)propyl isocyanate have been prepared and characterized. A variety of techniques such as differential scanning calorimetry (DSC), Fourier tra...

2015
Eideh Mofarrah Sayyed Mostafa Habibi-Khorassani Malek Taher Maghsoodlou Mehdi Shahraki

The hindered internal rotations around the partial carbon-carbon double bond, nitrogen-carbon and carbon-carbon single bonds within the 2-(2-chloro-phenothiazine-l-yl)-3-(triphenylphosphoranylidene) butandioate has been experimentally studied by the dynamic H NMR spectroscopic in variable temperatures. The activation (∆H, ∆S, ∆G) and kinetic (kc, Ea) parameters have been calculated in a series ...

Journal: :Magnetic resonance 2021

Abstract. The review describes the application of nuclear magnetic resonance (NMR) spectroscopy to study kinetics folding, refolding and aggregation proteins, RNA DNA. Time-resolved NMR experiments can be conducted in a reversible or an irreversible manner. In particular, folding pose large requirements for (i) signal-to-noise due time limitations (ii) synchronising steps. Thus, this contributi...

Journal: :Current Opinion in Colloid and Interface Science 2023

Nuclear Magnetic Resonance (NMR) is a powerful technique to probe the local environment of atoms bearing nuclear spin. Interfaces in rechargeable battery, within multi-component electrode or electrolytes between electrodes and electrolyte, are key its function lifetime. NMR spectroscopy solid phases battery participate understanding processes at these interfaces. The solid-state community still...

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