BACKGROUND/AIM There are a lot of studies aiding to the opinion that the involvement degree of axilla lymph nodes grows depending on increase of breast tumor size, and its histological and nuclear grades. The aim of this study was to assess the risk of axillary lymph nodes involvement, as well as the relation between the tumor size, histological and nuclear grades in a group of female patients ...

Mercury (Hg) stable isotopes have been broadly used to investigate the sources, transformation and deposition of atmospheric Hg during industrial era thanks multiple isotope signatures deriving from mass-dependent (represented by δ202Hg) mass-independent fractionation ΔxxxHg) in environment. Less is known about impact past climate change on cycling, whether covary with climate. Here, we concent...

1. Apo-superoxide dismutase was more labile toward a variety of inactivating stresses than was the holoenzyme. 2. cu++ restored catalytic activity to the apoenzyme and markedly enhanced its thermal stability but Cu++ plus Zn++ were needed to attain the stability of the native enzyme. 3. Co’-+ or Hgii were able to replace Zn++ in increasing the thermal stability of the Cu+f-repleted apoenzyme. I...

Observations of reactive gaseous mercury (RGM) in marine air show a consistent diurnal cycle with minimum at night, rapid increase at sunrise, maximum at midday, and rapid decline in afternoon. We use a box model for the marine boundary layer (MBL) to interpret these observations in terms of RGM sources and sinks. The morning rise and midday maximum are consistent with oxidation of elemental me...

We performed intensive sampling campaigns of Hg fluxes over emergent macrophytes in the Florida Everglades to find a surrogate for Hg fluxes from water and vegetation to identify the mechanisms of emission. We measured daytime lacunal and sediment gas concentrations of Hg, which suggested that the lacunal space acts as temporary storage for Hg and CH4. The absence of detectable Hg fluxes measur...

In a previous paper some of us presented the structure and properties new family ionic liquids, ILs, with common cation, 1-butyl-3-methyl imidazolium (the popular [C4C1Im]+ or [BMIM]+) variety anions based in thiocyanate (SCN)−: one reference sample ten anionic metal complexes different valences: AlIII, MnII, FeIII, CrIII, NiII, HgII, ZnII, CoII CuI, resulting, respectively, [BMIM](SCN), [BMIM]...

We have determined the three-dimensional (3D) structure of DNA duplex that includes tandem Hg(II)-mediated T-T base pairs (thymine-Hg(II)-thymine, T-Hg(II)-T) with NMR spectroscopy in solution. This is the first 3D structure of metallo-DNA (covalently metallated DNA) composed exclusively of 'NATURAL' bases. The T-Hg(II)-T base pairs whose chemical structure was determined with the (15)N NMR spe...

We identified some of the sources and sinks of monomethyl mercury (MMHg) and inorganic mercury (HgII) on Ellesmere Island in the Canadian High Arctic. Atmospheric Hg depletion events resulted in the deposition of Hg(II) into the upper layers of snowpacks, where concentrations of total Hg (all forms of Hg) reached over 20 ng/L. However, our data suggest that much of this deposited Hg(II) was rap...