Lysine-Grafted MCM-41 Silica as an Antibacterial Biomaterial.

This paper proposes a facile strategy for the zwitterionization of bioceramics that is based on the direct incorporation of l-lysine amino acid via the ε-amino group onto mesoporous MCM-41 materials. Fourier transform infrared (FTIR) studies of lysine-grafted MCM-41 (MCM-LYS) simultaneously showed bands at 3080 and 1540 cm and bands at 1625 and 1415 cm corresponding to -NH/COO pairs, which demonstrate the incorporation of the amino acid on the material surface keeping its zwitterionic character. Both elemental and thermogravimetric analyses showed that the amount of grafted lysine was 8 wt.

Acute abdominal symptoms as the first presentation of a patient with mirror-image dextrocardia with situs inverus.

This is the case of a 63 years old female that was admitted with abdominal pain mainly localized in the left lower quadrant, with diffuse radiation to the rest of the abdomen. It persisted for two days and worsened on the day of admission. It was associated with two episodes of vomiting and fever.