Mercury is known to be a toxic material with adverse effects on the body as claimed by so many researchers and always projected a negative aspect of this element. It is true that it may cause a several problems when it exceeds the safe limit but along with its negative image, mercury has been playing a positive role in the field of medicine and dentistry. It has many therapeutic uses including ...

The methods of polarographic analysis have been applied to the study of dilute aqueous solutions of various divalent transition metal cations coordinated to p-toluenesulfonyl glycine. Metal cations used were cadmium (II), copper (II), lead (II), mercury (II), manganese (II) and zinc (II). Six new and previously unreported compounds were prepared and studied polarographically, and their dissocia...

In this study a new method by Application of graphene oxide Nano sheets– Melamine –TioOxalic acid composite was exhibited as adsorbent for the elimination of toxic mercury (II) ions from aqueous solutions. The combine has the authority to adsorb the organic and inorganic combines. Through the immobilization of Melamine-TioOxalic acid (MTO) onto graphene oxide nanosheets, the desired composite w...

A systematic series of seven mercury compounds of (E)-N-(pyridin-2-ylmethylidene)arylamine (L), where L is a variously R substituted ligand, with the formulations [HgX2L]2: X = Cl; R = 4-CH2CH3 (4), 4-OCH2CH3 (5), 4-Cl (6), 2-CO2CH3 (7), or 4-CO2CH3 (8); X = Br; R = 4-CO2CH3 (9a) and [HgX2L]: X = Br; R = 4-CO2CH3 (9b) and X = I; R = 4-CO2CH3 (10), were synthesized. All compounds have been struc...

The surface activity of xanthine (Xan) and xanthosine (Xano) at a hanging mercury drop electrode (HMDE) was studied using out-of-phase ac and cyclic dc voltammetry. The results show that Xan and Xano were strongly adsorbed and chemically interacted with the charged mercury surface, which is the prerequisite step for applying the cathodic adsorptive stripping voltammetric determination of such b...

Descriptors have been determined for four inorganic mercury(II) species and for seventeen organic mercury(II) species, using experimental literature data. These descriptors can then be used in equations that we have already set out in order to estimate a large number of physicochemical properties. These include the water to octanol partition coefficient and the gas to water partition coefficien...

A Chesapeake Bay water isolate of Mycobacterium scrofulaceum containing a 115-megadalton plasmid (pVT1) grew in the presence of 100 microM HgCl2 and converted soluble 203Hg2+ to volatile mercury at a rate of 50 pmol/10(8) cells per min. Cell extracts contained a soluble mercuric reductase whose activity was not dependent on exogenously supplied thiol compounds. The enzyme displayed nearly ident...

This contribution is based on our presentation at the 1 International Symposium on Sensor Science, Paris, 16-20 June 2003. It presents recent results regarding the electrochemical determination of submicromolar and nanomolar concentrations of various carcinogenic substances (nitrated polycyclic aromatic hydrocarbons, heterocyclic compounds, azo compounds, aromatic amino compounds, etc.) using b...

Executive Summary This chapter describes atmospheric transport, ambient concentrations and depositions of heavy metals, observed and modelled concentrations and temporal trends of heavy metals in environmental media and biota and comparisons, as appropriate, with effects indicators of significance. It provides, moreover, an assessment of effects on ecosystem and human health from the deposition...