نتایج جستجو برای: nmr measurement

تعداد نتایج: 497834  

2005
Gregory B. Cranney Chaim S. Lotan Larry Dean William Baxley Alain Bouchard Gerald M. Pohost

Proton nuclear magnetic resonance (NMR) imaging has the potential to serially assess left ventricular (LV) volumes with optimal accuracy because it is a high-resolution, threedimensional, noninvasive modality. Previous NMR studies to assess LV volumes have been suboptimal, as they have used either planes aligned with the axes of the body, which are compromised by partial volume effects, or spin...

Journal: :Soft matter 2015
Matthew Wallace Jonathan A Iggo Dave J Adams

Supramolecular hydrogels are formed via the self-assembly of gelator molecules upon application of a suitable trigger. The exact nature of this self-assembly process has been widely investigated as a practical understanding is vital for the informed design of these materials. Solution-state NMR spectroscopy is an excellent non-invasive tool to follow the self-assembly of supramolecular hydrogel...

Journal: :Circulation 1990
G B Cranney C S Lotan L Dean W Baxley A Bouchard G M Pohost

Proton nuclear magnetic resonance (NMR) imaging has the potential to serially assess left ventricular (LV) volumes with optimal accuracy because it is a high-resolution, three-dimensional, noninvasive modality. Previous NMR studies to assess LV volumes have been suboptimal, as they have used either planes aligned with the axes of the body, which are compromised by partial volume effects, or spi...

Journal: :iranian biomedical journal 0
عباس تهذیبی abbas tahzibi فاطمه کمال fatemeh kamal مهناز مظاهری اسدی mahnaz mazaheri assadi

a pseudomonas aeruginosa mutant derived by random mutagenesis with n-methyl-n¢-nitro-n-nitrosoguanidine, producing high levels of the rhamnolipid biosurfactants was selected on siegmund-wagner (sw) plates. the mutant designated p. aeruginosa ptcc1637 produces rhamnolipids at concentrations 10 time more than parent strain. nmr analysis and surface tension measurement showed that the biosurfactan...

Journal: :Analytical chemistry 2012
Antoni Beltran Manuel Suarez Miguel A Rodríguez Maria Vinaixa Sara Samino Lluís Arola Xavier Correig Oscar Yanes

Because of the wide range of chemically and structurally diverse metabolites, efforts to survey the complete metabolome rely on the implementation of multiplatform approaches based on nuclear magnetic resonance (NMR) and mass spectrometry (MS). Sample preparation disparities between NMR and MS, however, may limit the analysis of the same samples by both platforms. Specifically, deuterated solve...

Journal: :Annual review of biochemistry 1981
D G Gadian G K Radda

During the past six or seven years, high resolution nuclear magnetic resonance (NMR) has been established as a powerful tool for the study of cellular metabolism in isolated cells and organs. The non-invasive nature of the measurement offers many advantages over conventional analytical techniques, but limitations on sensitivity restrict the method to the observation of molecules present in the ...

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