The purpose of this study was to investigate the effect of CPP-ACP treatment and Nd:YAG laser on microtensile bond strength (µTBS) of softened dentin. Sixty samples were obtained from thirty sound third molars. All samples were submitted to dentin softening procedure, by the immersion of the specimens in 30 mL of Sprite Zero for 30 min. Afterwards, the samples were randomly divided according to...

Among the tests of a leader, few are more challenging-and more painful-than recovering from a career catastrophe. Most fallen leaders, in fact, don't recover. Still, two decades of consulting experience, scholarly research, and their own personal experiences have convinced the authors that leaders can triumph over tragedy--if they do so deliberately. Great business leaders have much in common w...

An etiological study was conducted to clarify whether the flagellate-like cells found in histological preparations of the tunic of diseased Halocynthia roretzi (Drasche) were the causative agent of soft tunic syndrome in this ascidian. When pieces of softened diseased tunic were incubated overnight in sterile seawater, live flagellated cells, which were actively swimming in the seawater, were o...

The statistical mechanics of N cold dark matter (CDM) particles interacting via a softened gravitational potential is reviewed in the microcanonical ensemble and mean-field limit. A phase diagram for the system is computed as a function of the total energy E and gravitational softening length ǫ. For softened systems, two stable phases exist: a collapsed phase, whose radial density profile ρ(r) ...

Leadership is an under-studied topic in the international development literature. When the topic is broached it is usually in support of what might be called a ‘hero orthodoxy’: One or other individual is identified as the hero of a specific achievement. The current article offers a three part argument why this orthodoxy is problematic and wrong for many developing countries, however. It sugges...

The fibrillar architecture in the general matrix of softened cartilage has been compared with that of the normal matrix using both Nomarski light microscopy and transmission electron microscopy with combined stereoscopic reconstruction. A pseudorandom network developed from an overall radial arrangement of collagen fibrils is the most fundamental ultrastructural characteristic of the normal gen...