The water content in seven glass samples from the K/T boundary on Haiti was determined by micro-infrared spectrometry. These glasses are thought to result from impact melting associated with the K/T boundary impact, although this interpretation is not unanimous. The results of the water determinations, 0.013-0.021 wt% H20, show that the Haiti glasses are water-poor. This is a common characteris...

OBJECTIVE The optimal polymerization of resin-based luting cements plays a critical role in the long-term clinical success of dental prostheses and indirect restorations. This study investigated a mutual action between the conformational changes and mechanical properties of a dimethacrylate resin-based luting cement with and without pre-application of the acidic functional monomer 10-methacrylo...

I) UVAL’S EXAMINATION by thermal gravimetry of nearly 1000 chemical precipitates (1) had suggested to one of us the employment of thermal methods in the analysis of concretions of biologic origin. Indeed, use of the thermogravimetric technic was made in conjunction with infrared spectrophotometry (2) and X-ray crystallography (3) in investigations concerning tile formation mechanism of renal tr...