Concept

Méthyle

Publications associées (89)

Proton NMR of15N-choline metabolites enhanced by dynamic nuclear polarization

Rolf Gruetter, Geoffrey Bodenhausen, Arnaud Comment, Sami Jannin, Paul Romeo Vasos, Riddhiman Sarkar

(Figure Presented) Chemical shifts of protons can report on metabolic transformations such as the conversion of choline to phosphocholine. To follow such processes in vivo, magnetization can be enhanced by dynamic nuclear polarization (DNP). We have hyperp ...

2009

Directed Biosynthesis of Phytotoxic Alkaloids in the Cyanobacterium Nostoc 78-12A

Cyril Portmann, Karl Gademann, Cora Prestinari, Theresa Myers

Nostocarboline, a chlorinated and N-methylated carbolinium alkaloid, displays potent and selective inhibition of photoautotrophic organisms as well as the malaria parasite Plasmodium falciparum, while showing very low toxicity to bacterial and fungal patho ...

2009

Conversion of amine- to carboxyl groups on solid surfaces

Gerardo Turcatti

This invention provides a new method of obtaining a high density, reproducible and uniform coverage of a solid surface, compounds suitable for such a method and methods of preparing such compounds. This invention further relates to methods of the chemical ...

2007

Application of Density Functional Theory and Vibrational Spectroscopy Toward the Rational Design of Ionic Liquids

Paul Joseph Dyson, Ana Vidis

D. functional theory methods in combination with vibrational spectroscopy are used to investigate possible variants of mol. structure of the ion pairs of several imidazolium-based ionic liqs. (ILs). Multiple stable structures are detd. with the anion posit ...

2007

Synthesis, crystal structures and spectra of Hg(II)-1,2-bis(diphenylphosphino)ethane monoxide complexes: Monomer and polymer formation

The reaction of mercury(II) halides with 1,2-bis(diphenylphosphino)ethane monoxide (dppeO) in 1:1 molar ratio yielded P,O-coordinated polymers having the empirical formula [HgX2(dppeO)]n [X = Cl (1), Br (2), I (3)]. In contrast, the reaction between the sa ...

2007

Importance of the structure of vancomycin binding pocket in designing compounds active against vancomycin-resistant enterococci (VRE)

Jieping Zhu

16-Membered meta,para-cyclophanes mimicking the vancomycin binding pocket (D-O-E ring) are designed and synthesized. The structural features of these biaryl ether contg. macrocycles are: (a) the deletion of the carboxyl group of vancomycin's central amino ...

2006

Better characterization of surface organometallic catalysts through resolution enhancement in proton solid state NMR spectra

Frédéric Blanc, David Lyndon Emsley

Delayed-acquisition methods, namely, echo and constant-time-acquisition approaches, allow a significant improvement in resolution in the proton solid state NMR spectra of surface organometallic catalysts such as [ syn-( SiO) Mo-( =NAr)( =(CHBu)-Bu-t)( (CH2 ...

AMER CHEMICAL SOC2006

Polyphenylene dendrimers as scaffolds for shape-persistent multiple peptide conjugates

Harm-Anton Klok

The present work describes synthetic concepts for the coupling of peptides to polyphenylene dendrimers (PPDs). Novel functionalized cyclopentadienones have been synthesized whose Diels-Alder cycloaddition with various core molecules leads to polyphenylene ...

2005

Inhibition of bacterial adhesion on PVC endotracheal tubes by RF-oxygen glow discharge, sodium hydroxide and silver nitrate treatments

Christoph Hollenstein, Karine Triandafillu

Medical-grade poly(vinyl chloride) (PVC) was chemically modified to study how the incorporation of monovalent silver influences Pseudomonas aeruginosa adhesion and colonization. The modification investigated consisted of a radio frequency-oxygen (RF-O-2) g ...

2004

Reinforcement of single-walled carbon nanotube bundles by intertube bridging

Jürgen Brugger, László Forró, Andras Kis, Andrzej Kulik, Willy Benoit

During their production, single-walled carbon nanotubes form bundles. Owing to the weak van der Waals interaction that holds them together in the bundle, the tubes can easily slide on each other, resulting in a shear modulus comparable to that of graphite. ...

2004

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