The largest source of mercury located in dental amalgam fillings people. In this study, mercury level in saliva of amalgam and non-amalgam human were compared as well as the level of α amylase has been detected. Materialsand methods: The concentration of mercury, silver, and activity of amylase in saliva were measured in 55 adult study subjects. The mercury contents were determined by cold–vapo...

A vacuum ultraviolet absorption spectroscopy system for a wide measurement range of atomic number densities is developed. Dual-tube inductively coupled plasma was used as a light source. The probe beam profile was optimized for the target number density range by changing the mass flow rate of the inner and outer tubes. This system was verified using cold xenon gas. As a result, the measurement ...

We study pump–probe spectroscopy of Rb vapor. Absorption spectra are presented for a weak probe beam in a room temperature vapor subject to a strong counter propagating pump beam of identical frequency. The importance of hyperfine pumping in the formation of the sub-Doppler spectrum is explained. For typical experimental parameters we clarify why the standard designation of ‘‘saturated absorpti...

Determination of Mercury in Biological Sample in Muar River Estuary, West Johor, Malaysia. This study was carried out at the Estuary of Muar River, west Johor, Malaysia. Different types of biota species namely Crassostrea irredalei, Perna viridis and Anadara granosa were collected all through the torrential rainy season in November 2005. These biota species were dried and then cooked in an acid...

Abstract Plants are mainly made up of water, which constitutes between 80 and 90% their weight. Moisture factor comes across as one the most important in tobacco products. Rapid determination moisture content products at necessity any management plants (before after production). Therefore, concern has been raised this study to evaluate four kinds combustible using gravimetric method. In additio...