Genetic and symbiotic characterization of rhizobia nodulating legumes in a mining area in southeast Brazil

AbstractWe present the magnetic, structural and 57Fe Mossbauer characterization of soils collected from an ancient mercury contaminated city named Huancavelica in Peru. The characterization results indicate that silicates and carbonates are the main mineralogical constituents in the samples. In addition, 57Fe Mössbauer spectra at room temperature reveal, the presence of two components: a magnetic component related to magnetic Fe-oxides (magnetite, hematite, goethite) and a high non-magnetic component related to Fe+3 in high spin configuration and tetrahedral coordination in silicates. The magnetization measurements present screening of paramagnetic, ferromagnetic and antiferromagnetic signals, typical from soils containing different silicates and iron minerals. Remarkably the Verwey and Morin transitions corresponding to magnetite and hematite, respectively, are screened by the paramagnetic signal corresponding to the major silicate components in the samples. Overall, the soils are mainly composed of crystalline and amorphous silicates, calcites and iron bearing which are typical from Andean soils.

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Epidemiological characterization of resistance and PCR typing of Shigella flexneri and Shigella sonnei strains isolated from bacillary dysentery cases in Southeast Brazil

Brazilian Journal of Medical and Biological Research ◽

10.1590/s0100-879x2007000200012 ◽

2007 ◽

Vol 40 (2) ◽

pp. 249-258 ◽

Cited By ~ 16

Author(s):

M.P.A. Penatti ◽

L.M. Hollanda ◽

G. Nakazato ◽

T.A. Campos ◽

M. Lancellotti ◽

...

Keyword(s):

Bacillary Dysentery ◽

Shigella Flexneri ◽

Shigella Sonnei ◽

Southeast Brazil ◽

Epidemiological Characterization

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Trace element characterization of fine particulate matter and assessment of associated health risk in mining area, transportation routes and institutional area of Dhanbad, India

Environmental Geochemistry and Health ◽

10.1007/s10653-019-00329-z ◽

2019 ◽

Vol 41 (6) ◽

pp. 2731-2747 ◽

Cited By ~ 3

Author(s):

Sridevi Jena ◽

Atahar Perwez ◽

Gurdeep Singh

Keyword(s):

Particulate Matter ◽

Health Risk ◽

Trace Element ◽

Fine Particulate Matter ◽

Mining Area ◽

Fine Particulate ◽

Transportation Routes

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Geochemical characteristics and water pollution by Potentially Toxic Elements at the Varatec creek, Baiut mining area, Romania.

10.5194/egusphere-egu21-13995 ◽

2021 ◽

Author(s):

Diego Santanna ◽

Ampurire Aryampa ◽

Gyozo Jordan ◽

Damian Gheorghe ◽

Csaba Szabo

Keyword(s):

Distribution Patterns ◽

Mining Area ◽

Element Distribution ◽

Geochemical Background ◽

Dissolved Metals ◽

Geochemical Characterization ◽

Ph Values ◽

High Sulfate ◽

Gt Element

This study provides an identification and evaluation of the Potentially Toxic Element (PTE) (Co, Cu, Cd, Pb, Zn, and Ni) sources, speciation, mobility, distribution patterns, enrichment, and relationships along the Varatic Creek and its tributaries in the Baiut Mining Area, Romania. ICP-OES trace element concentrations were measured in collected samples. The geochemical characterization of the Varatec Creek revealed that the water contains high dissolved metals, high sulfate concentrations, and low pH values, dominated by Ca+2 and SO&#8324;2- cation and anion in streamwater.The calculated median concentrations were much higher than&#160; the average surface water concentrations in Europe (FOREGS) and decreased in the order of Zn(126.2&#956;g.l-1)>>Cu(3.4&#956;g.l-1)>Ni(1.6&#956;g.l-1)=Cd(1.6&#956;g.l-1)>Co(0.5&#956;g.l-1)>Pb(0.3&#956;g.l-1). The relative variability (MAD/median) follow the order Cd(90%)>Co(80%)=Zn(80%)>Cu(60%)=Ni(60%)>Pb(50%). The regional enrichment factor calculated as the Median/FOREGS(European level) follow the order Cd(156)>>Zn(47)>>Cu(3.8)>Pb(3)=Co(3)>Ni(0.9).Element distribution, geochemical behavior and source, aqueous speciation modeling, and correlation analysis were performed to estimate the metal sorption to Fe-oxyhydroxide, Mn-oxyhydroxide, and sulfates. Detailed data analysis, reaction modelling and geochemical interpretation revealed two distinct groups of PTEs in the studied mining-impacted streamwater: Ni and Co seem to be associated with the geochemical background, while Cd, Pb, Zn, and Cu are originating from mining activities.

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Deep-water Raphitomidae (Mollusca, Gastropoda, Conoidea) from the Campos Basin, southeast Brazil

Zootaxa ◽

10.11646/zootaxa.3527.1.1 ◽

2012 ◽

Vol 3527 (1) ◽

pp. 1

Author(s):

RAQUEL MEDEIROS ANDRADE FIGUEIRA ◽

RICARDO SILVA ABSALÃO

Keyword(s):

Continental Slope ◽

Deep Water ◽

South Atlantic ◽

The South ◽

Southeast Brazil ◽

Campos Basin ◽

Soft Bottoms ◽

First Time ◽

Box Corer

During the program “Environmental Characterization of the Campos Basin, RJ, Brazil”, carried out from 2001 to 2003,117 stations were sampled on the continental slope of the Campos Basin off southeast Brazil, by the Research Vessel“Astro-Garoupa”. The samples were taken on soft bottoms at depths from 700 to 1950 m, with a 0.25 m2 box corer or bydredging with a Charcot dredge. Mollusks were present at all of the stations, and among the Gastropoda the Conoideashowed the highest diversity. Here we present the results obtained for the most abundant family, Raphitomidae. We found21 species in eight genera: Famelica, Eubela, Xanthodaphne, Magnella, Gymnobela, Pleurotomella, Aliceia andNeopleurotomoides. The last two genera are reported here for the first time in the South Atlantic Ocean. Among the 21species two had been previously reported for this region: Magnella malmii (Dall, 1889) and M. extensa (Dall, 1881).Three species had been reported for Brazil, but the new finds expand their known geographical distribution: Eubelalimacina (Dall, 1881), Famelica mirmidina (Dautzenberg & Fischer, 1986) and Pleurotomella cala (Watson, 1885).Twelve species are reported for the first time in the South Atlantic: Aliceia aenigmatica Dautzenberg & Fischer, 1897,Xanthodaphne dalmasi (Dautzenberg & Fischer, 1897), Xanthodaphne araneosa (Watson, 1881), Magnella watsoni(Dautzenberg, 1889), Gymnobela chyta (Watson, 1881), G. atypha (Bush, 1893), Gymnobela bairdii (Verrill & Smith,1884), Gymnobela blakeana Dall, 1881, Pleurotomella perpauxilla (Watson, 1881), P. bureaui (Dautzenberg & Fischer,1897), P. cf. anceyi (Dautzenberg & Fischer, 1897) and P. coelorhaphe (Dautzenberg & Fischer, 1896). Four species arenew to science and are described here: Neopleurotomoides aembe, Xanthodaphne pichi, Gymnobela xaioca and Pleurotomella ybessa.

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