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Here it is described nanogels (NG) based on a chitosan matrix, which are covalently stabilized by a bisamide derivative of Mn‐t‐CDTA (t–CDTA = trans‐1,2‐diaminocyclohexane‐N,N,N′,N′‐tetraacetic acid). the Mn(II) complex acts both as a contrast medium and as a cross‐linking agent. These nanogels are proposed as an alternative to the less stable paramagnetic nanogels obtained by electrostatic interactions...
Metal ions play important structural and functional roles in many biological systems. The NMR spectroscopic characterization of biomolecules not only had to deal with the need of taking them into account, but also successfully exploited the characteristics of the paramagnetic metals to obtain structural information. The latter proved so important that diamagnetic proteins are in several cases made...
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