A new copper(II) compound, [Cu(L-proline)(2)](2).5H(2)O (C(20)Cu(2)H(42)N(4)O(13)) (called compound I) was synthesized and crystallized, and its structure was solved using X-ray methods. It is monoclinic, space group P2(1), with a = 11.187(1) Å, b = 12.172(3) Å, c = 11.661(1) Å, beta = 114.96(1) degrees, and Z = 2. There are two chemically different copper molecules (labeled A and B), both with the copper atom in a N(2)O(2) square planar coordination. Molecule type A has one water molecule in an apical position. Molecule B has water molecules in each of the two apical positions. Single-crystal EPR measurements have been performed in I and also in Cu(D,L-proline)(2).2H(2)O (compound II). From the similar angular variations of the position of the single resonance observed in both compounds, we evaluated the molecular g tensors. Interpretation of the molecular g tensors resulted in d(x)()()2(-)(y)()()2 orbital ground states. From the angular variations of the line width we calculated the magnitude of the exchange interactions coupling neighbor copper ions in each compound. In I copper ions type A at 7.25 Å are arranged in chains coupled through axial-equatorial bonds. The exchange coupling within these chains is |J/k| = 118 mK. The coupling between copper ions type B is weaker. However, the interactions between copper ions type A and B generate a three-dimensional magnetic network. Our data in compound II indicate that a superexchange pathway containing a weak hydrogen bond C-H- - -O is the path for an exchange interaction with |J'/k| = 48 mK between coppers in neighbor layers at 9.75 Å.
Entre las acciones destinadas a promover la salud integral de la comunidad universitaria, fomentar iniciativas en educación alimentaria es una premisa clave para las Universidades Saludables. El presente trabajo de docencia-investigación valora los factores condicionantes que operan en estrategias educativas en torno al conocimiento y cumplimiento de las Guías Alimentarias para la Población Argentina (GAPA 2016) en estudiantes de la Facultad de Bioquímica-UNL, contextualizadas al ámbito en que desarrollan sus actividades académicas. Se encontró que los alumnos del ciclo básico de Bioquímica y Biotecnología poseen menor tendencia al desarrollo de hábitos en alimentación saludable que los de Nutrición. Si bien la universidad ofrece espacios comunes para tal desempeño (comedor y predio de deportes), éstos resultan poco aprovechados, siendo la falta de tiempo el factor condicionante destacado que conduce a estilos de vida poco saludables en las tres carreras. Sin embargo, estrategias educativas que abordan la temática de alimentación y actividad física saludables logran despertar marcado interés en los estudiantes. Resulta de fundamental importancia sumar esfuerzos académicos para que los universitarios puedan apropiarse de los conocimientos básicos en esta área, facilitadores de roles inherentes a su disciplina en la última etapa de su educación formal.
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