OBJECTIVES The aim of this study was to determine the effect of ageing on the light intensity of quartz-tungsten-halogen (QTH) polymerization units in dental schools and dental clinics. MATERIALS & METHODS Two dental schools and multiple public health dental clinics were visited and the light intensity of curing units was assessed. The age, make, model and service history were recorded. A cal...

The purpose of this work is to provide a complete study of the influence of operational parameters of the supercritical carbon dioxide assisted extraction (SC CO2E) on yield of wedelolactone from Wedelia calendulacea Less., and to find an optimal combination of factors that maximize the wedelolactone yield. In order to determine the optimal combination of the four factors viz. operating pressur...

Individuals are less likely to make morally desirable decisions when they in groups. I study this phenomenon makes groups produce a outcome than one individual alone. formulate and test model which moral occurs if at least costly decision. Using lab experiment data from field experiments on the bystander effect, show that most individuals moral, is more be produced by individual, whereas immora...