The luminescence of mercury clusters in the gas phase has been studied extensively in the past [ 11. Mercury vapor shows many emission bands including the ultraviolet (A,,=335 nm) and green (1,,,=485 nm) luminescence which originate from excited dimers Hg2 and trimers Hg,, respectively. In contrast to the gas phase very little is known about the emission of mercury clusters in the condensed pha...

Methylmercury is a toxic substance which accumulates in fish and other biota and causes toxicological problems when consumed by humans. Certain mercury resistant bacteria are able to convert the highly toxic methylmercury to a much less toxic form. Several mer operons, a group of genes which encode this function, have been cloned and characterized. However, they have been isolated and cloned fr...

In May, 1956 a conference was held at the New York Academy of Sciences on the subject "Anesthesia and Related Problems." The results of this conference are now presented in a series of 15 papers. On the whole these papers are characterized by an academic and objective approach to many of the clinical problems relating to anesthesia but because of their fundamental nature some of them can also b...

For the first time, the present study removes ions of mercury, in the form of Hg (I) and Hg (II) ions, from aqueous solutions by adsorbing them onto titanium dioxide nanoparticles. The effects of various parameters, such as solution's initial pH, temperature, sorbent dosage, initial mercury concentration, and contact time have been examined on the adsorption process. The experimental results ha...

For the first time, the present study removes ions of mercury, in the form of Hg (I) and Hg (II) ions, from aqueous solutions by adsorbing them onto titanium dioxide nanoparticles. The effects of various parameters, such as solution's initial pH, temperature, sorbent dosage, initial mercury concentration, and contact time have been examined on the adsorption process. The experimental results ha...

forty bacteria species commonly found in soil, sediments, and sewage effluent were exposed for acclimation to inorganic and organic mercury compounds using sterilized sediments as the culture medium. screening tests for the ability of microorganisms to methylate inorganic mercury were made on all 40 species after acclimation to 13.5 mg/i mercuric chloride. additional screening tests for demethy...

There is much uncertainty regarding the sources of reactive mercury (RM) compounds and atmospheric chemistry driving their formation. This work focused on assessing potential measured in Reno, Nevada, United States, using 1 year data collected Reactive Mercury Active System. In addition, ancillary meteorology criteria air pollutant data, Hybrid Single-Particle Lagrangian Integrated Trajectory (...

Mercury is a silvery white liquid metal that is volatile at room temperature due to its high vapour pressure. It exists in different oxidation states and can form a number of compounds. Mercury and its compounds can be absorbed into the human body by inhalation, ingestion, and through the skin. It is toxic when certain threshold values are exceeded. Acute toxicity is due to the inactivation of ...

mercury is one of the most toxic heavy metals present in aquatic systems, exhibiting a complex behaviour in the environment, where it may persist for decades after the source of pollution is stopped. hence, it is important develop new techniques for its removal from the aquatic systems. in this context, a particularly promising line of research is the use of new materials capable of up taking m...