Mortars, which are very important elements for the integrity of historic monuments, consist mainly calcium carbonate and silicates in different proportions. Chemical dissolution due to exposure open air is degradation mortars. Inorganic nanoparticles with chemical crystallographic affinity mortar components expected be effective structure stabilizers agents offering resistance dissolution. In p...

1,1-diacetates(acylals) were prepared by direct condensation of various aldehydes with acetic anhydride using dipyridine cobalt chloride (copy2cl2) as an efficient and green catalyst under solvent-free conditions at room temperature. the important features of this catalyst method are that the catalyst is solid, stable at high temperatures, soluble in water, stable in air, immiscible in common o...

The possibility that the exposure of organisms to whole-body hyperthermia may provide protection against subsequent thermal exposures is intriguing and may play an important role in the clinical scheduling of fractionated hyperthermia. We used C3H mice to investigate whether whole-body heating can be used as a conditioning treatment to induce protection of mice against thermal death from a subs...