Fourier-Transformed Infrared Spectroscopy Applied for Studying Compatible Interaction in the Pathosystem Phytophtora infestans-Solanum tuberosum

In this study we used the Fourier-Transformed Infrared (FT-IR) technique to examine the compatible reaction of potato (Solanum tuberosum) to infection by the late blight agent Phytophthora infestans. Three virulent isolates have been used, different by their level of pathogenicity on R2 potato. The response was dependent on the pathogenicity of the isolate. The Infrared spectra in the middle infrared region (MIR) of infested versus healthy (control) leaves showed that controls absorb (intensity) mostly in the range 650-950 cm-1.The absorbance was higher for the most virulent isolate in the range 950-1650 cm-1. In the domain 3000-4000 cm-1 for the control and less pathogenic interactions, have absorbed more than the highly infested samples. The shape of spectra has generally been the same shape. However, the number of peaks suppressed/induced after inoculation and in function of the isolate differs indicating a perturbation of plant metabolsim. FTIR technique provides important information about the events occurring during the interaction

Proceedings of the 24th Paediatric Rheumatology European Society Congress: Part three

From Springer Nature via Jisc Publications Router.Publication status: PublishedHistory: collection 2017-09, epub 2017-09-0

New Hydrogels Based on Substituted Anhydride Modified Collagen and 2‑Hydroxyethyl Methacrylate. Synthesis and Characterization

Semi-interpenetrated networks were obtained by free radical polymerization/cross-linking of substituted anhydride modified collagen with 2-hydroxyethyl methacrylate (HEMA) in the presence of ammonium persulfate (APS) and <i>N</i>,<i>N</i>,<i>N</i>′,<i>N</i>′-tetramethyl ethylene diamine (TEMED). Substituted anhydride modified collagens, porous materials with vinyl groups, have been previously synthesized by reaction of soluble collagen with dimethyl maleic anhydride (DMA) or citraconic anhydride (CTA). The structure and physicochemical properties of the obtained hydrogels were investigated by Fourier transform infrared spectroscopy, scanning electron microscopy (SEM), and water retention studies. Thermal properties of substituted anhydride modified collagen and their corresponding hydrogels have been investigated by differential scanning calorimetry (DSC) in dried and hydrated states. The denaturation temperature (<i>T</i>_d), denaturation enthalpy, and glass transition temperature (<i>T</i>_g) have been determined, and they were found to be dependent on chemical composition, thermal history, and moisture content. The water states (free or bonded) in the hydrated samples were correlated with their swelling degree