La protección estatal de los edificios históricos. Un obstáculo a la empresarialidad

«Is State-led protection of historical buildings legitimate? Should a buil-ding be protected against the will of its owners? How do we reconcile the will to preserve the architectural heritage with individual freedom and property rights? In what way does this interference of the State affect entrepreneurship? State-led protection of historical buildings represents yet another government meddling in private property. Its enforcement condemns owners to maintain and preserve their properties against their will. It prevents the natural transformation of buildings and cities and may generate significant economic costs to society.» Key Words: Preservation, Entrepreneurship, Property Rigths. JEL Classification: R21, R28, R31, R52 Resumen: «¿Es legítima la protección estatal de edificios históricos? ¿Debe prote-gerse un edificio contra la voluntad de sus propietarios? ¿Cómo conciliar el de-seo de conservación del patrimonio arquitectónico con la libertad individual y con el derecho de propiedad? ¿De qué modo se manifiesta esta intervención en la actividad empresarial? La protección estatal de edificios históricos constituye una injerencia más de la administración pública en la propiedad privada. Su aplicación condena a los propietarios al mantenimiento y conservación de sus propiedades en contra de su voluntad. Impide la transformación natural de los edificios y de la ciudad, y puede generar importantes costes económicos para la sociedad». Palabras Clave: Protección de edificios, Empresarialidad, Derecho de Propiedad.

Partial Purifi cation, Stability Analysis, and Preservation of Xylanase from Xylanolytic Alkalophylic Bacteria

A xylanase, which produces xylose from oat spelt xylans, was isolated from the culture medium of xylanolytic alkalophylic bacteria mutant. The enzyme was purifi ed by ammonium sulphate with level 30, 40, 50, 60, 70, 80, and 90%. The purify of the fi nal preparation was demonstrated by sodium dodecyl sulphatepolyacrylamide gel electrophoresis. The molecular masses of the purifi ed xylanase were 137.61 and 165.34 kDa. Result of ammonium sulphate saturation with the highest activity was used as standart for saturation for enzyme production and preservation, using corn, tapioca, soy bean meal and gaplek fl our as carriers. Addition of 60% ammonium sulphate showed the highest xylanase activity (62.03 U/g), and produced 89.40% enzyme recovery. Tapioca, as a carrier, produced the highest xylanase activity. Key words: preservation, purifi cation, stability analysis, xylanase.