28 research outputs found
Lipophilic Cage Ligands: Synthesis, Spectroscopic Properties and Applications
Lipophilic Cage Ligands: Synthesis, Spectroscopic Properties and Application
New Lipophilic Multidentate Ligands: Effective Complexing Agents for Anions Activation in non Polar Media
NMR analysis of new Lipophilic Multidentate Ligands: Effective Complexing Agents for Anions Activation in non Polar Medi
13C and 1H Two-dimensional NMR Characterization of the Sodium Perchlorate Complex of a New Tetraoxatetraaza Lipophilic Cage Ligand
13C and 1H NMR characterization of the sodium perchlorafe complex of a new tetraoxatetraaza lipophilic cage ligand (1) derived from 1,7-dioxa-4,10-diazacyclododecane has been performed. 1H homonuclear correlated and 1H J-resolved two-dimensional experiments allowed the recognition of resonances due to different types of OCH2CH2N fragments, and of those of the hydrogens of the bridging chains. 13C resonances have been assigned on the basis of a 13C1H heteronuclear correlated two-dimensional experiment, together with the 13C NMR spectra of the synthetic precursors of 1. 13C spin-lattice relaxation times and NOE measurements established that the unique relaxation mechanism is dipole-dipole; the calculated rotational correlation times indicated that molecular reorientation is isotropic. 13C spectra and relaxation times obtained in different solvents showed that specific solute-solvent interactions are absent
Una nuova tecnica per la chirurgia conservativa del carcinoma mammario dei quadranti centrali ed inferiori
The authors present a new technical approach to the conservative surgery of breast localized in the central and inferior quadrants. Parenchymal removal is similar to the reduction mammoplasty with a superior pedicle. The technique is an achievement which fulfils the objectives of conserving the breast while yielding a good cosmetic outcome, with safety from the oncological point of view
PEPTIDES CONJUGATES, THEIR DERIVATIVES WITH METAL COMPLEXES AND USE THEREOF FOR MAGNETIC RESONANCE IMAGING (MRI).
The prepn. of gadolinium complexes of peptide conjugates as contrast agents for use in NMR (MRI) is described. This novel class of contrast agents may be used to identify and locate primary human tumors and their metastases which over-express type CCK A and/or type B cholecystokinin receptors, and/or type SSTR 1-5 somatostatin receptors (no data). Thus, gadolinium DTPA-peptide deriv. conjugates with Gly-CCK8 or vapreotide were prepd. (DTPA = diethylenetriaminepentaacetic acid, Gly-CCK8 = H-Gly-Asp-Tyr-Met-Gly-Trp-Met-Asp-Phe-NH2)