SRCosmos:

Order of appearence	Full citation	SRCosmos Link
1	Cervantes-Gonzalez E, Rojas-Avelizapa NG, Cruz-Camarillo R, Garcia-Mena J, Rojas-Avelizapa LI, (2008). Oil removal in media with proteo-chitinous wastes, by hydrocarbondegrading bacteria isolated from oil-polluted soils. Environ Technol, in press (2008).
2	Environmental Protection Agency (1992) Method 3010A: Acid digestion of aqueous samples and extracts for total metals for analysis by FLAA or ICP spectroscopy, USA.
3	Gadd GM, White C, (1993). Microbial treatment of metal pollution – a working biotechnology?. Trends Biotechnol, 11, 353-359.
4	Garza MT, (2005). Aislamiento de microorganismos con alta capacidad de tolerar y remover Pb(II), Cr(VI), Cd(II), Cu(II), Zn(II) y Ni(II), Tesis Doctorado, Facultad de Biologia, Universidad de La Habana
5	Hernandez A, Mellado R, Martinez JL, (1998). Metal accumulation and vanadium-induced multidrug resistance by environmental isolates of Escherichia hermannii and Enterobacter cloacae. Appl Environ Microbiol, 64, 4317-4320.
6	Kannan A, Ramteke PW, (2002). Uptake of nickel (II) by Serratia marcescens. J Environ Biol, 23, 57-59
7	Kim SU, Cheong YH, Seo DC, Hur JS, Heo JS, Cho JS, (2007). Characterization of heavy metal tolerance and biosorption capacity of bacterium strain CPB4 (Bacillus spp.). Water Sci Techol, 55, 105-111.
8	Lalitagauri R, Subham P, Debabrata B, Parimal C, (nd) Bioaccumulation of Pb(II) from aqueous solutions by Bacillus cereus M1 16. J Haz Subs Res, 5, 1-21. Consulted April 1 of 2008, available on line: http://www.engg.ksu.edu/HSRC/JHSR/v5_no1.pdf
9	Lu WB, Shi JJ, Wang CH, Chang JS, (2006). Biosorption of lead, copper and cadmium by an indigenous isolate Enterobacter sp. J1 possessing high heavy-metal resistance. J Hazardous Mat B. 134, 80-86.
10	Pumpel T, Pernfub B, Pigher B, Diels L, Schinner F, (1995). A rapid screening method for the isolation of metal-accumulating microorganisms. J Ind Microbiol, 14, 213-217.
11	Richards JW, Krumholz GD, Chval MS, Tisa LS, (2002). Heavy metal resistance patterns of Frankia Strains. Appl Environ Microbiol, 68, 923-927.
12	Roane TM, (1999). Lead resistance in two bacterial isolates from Heavy Metal-Contaminated Soils. Microbiol Ecol., 37, 218-224.
13	Roux M, Sarret G, Pegnot-Paintrand I, Fontecave M, Coves J, (2001). Movilization of Selenite by Rastonia metallidurans CH34. Appl Environ Microbiol, 67, 769-773.
14	Saitou N, Nei M, (1987). The neighbor-joining method: A new method for reconstructing phylogenetic trees. Mol Biol Evol, 4, 406-425.
15	Salehizadeh H, Shojaosadati SA, (2003). Removal of metal ions from aqueous solutions by polysaccharide produced from Bacillus firmus. Water Res, 37, 4231-4235.
16	Taniguchi J, Hemmi H, Tanahashi K, Amano N, Nakayama T, Nichino T, (2000). Zinc biosorption by a zinc-resistant bacterium, Brevibacterium sp. Strain HZM-1. Appl Microbiol Biotechnol, 54, 581-588.
17	Tamura K, Dudley J, Nei M, Kumar S, (2007). MEGA4: Molecular Evolutionary Genetics Analysis (MEGA) software version 4.0. Mol Biol Evol, 10.1093/molbev/msm092.
18	Valdman E, Gomes S, Caldas S, (2005). Effect of biosurfactant concentration on cadmium biosorption by Serratia sp. Isolated from a tropical soil. Comunicacao Tecnica ao XIII International Conference on Heavy Metals in the Environment, ICHMET, 05-09 Junio de 2005, Rio de Janeiro, RJ, Brasil, ISBN 85-7227-2127.
19	Wei-Bin L, Jun-Ji S, Ching-Hsiung W, Jo-Shu C, (2006). Biosorption of lead, cooper and cadmium by indigenous isolate Enterobacter sp. J1 possessing high heavy-metal resistance. J Hazard Mat B, 134, 80-86.
20	Yilmaz E, (2003). Metal tolerance and biosorption capacity of Bacillus circulans strain EB1. Res Microbiol, 154, 409-415.

Keywords
Abstract	Seven microorganisms isolated from a pitch lake located in Trinidad and Tobago were examined with respect to their ability to tolerate and remove metals such as Cd, Cr, Ni, Pb, Se, V, and Zn (chloride and sulfate forms in the case of the latter metal) in liquid and in solid culture. The microbial affinity for metals, evaluated in solid media, was ordered as Ni>Pb>Zn (sulfate)>V>>>Cr. The isolates were unable to grow in the presence of Cd and Zn (chloride). All the isolates were able to grow in the presence of Se, and the colonies developed a red color, which suggests their ability to reduce and incorporate this element. The ability of metal removal by biomass, determined in liquid media, followed the order Pb>Zn (sulfate)>V>Se>Ni, although it depended strongly on the evaluated microorganism, and on the metal salt and its concentration. The microorganisms were identified by16S rDNA partial sequencing. Six of them belong to cereus-thuringiensis genera and the other one evinced 98% homology with Serratia marcescens. The results obtained suggest that microorganisms isolated from Pitch Lake present interesting metabolic activities, which should be studied and explored for potential biotechnological applications.
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Name	Affiliation	Home page	e-mail	Total pubs
Ammons D	Department of Chemistry, University of Texas-Pan American Edimburg Texas			1
Cervantes-Gonzalez E	Universidad Autonoma de San Luis Potosi, Coordinacion Academica Region Altiplano. Carretera a Cedral Km 5+600, San Jose de las Trojes, 78700. Matehuala, S.L.P. Mexico			2
Cruz-Vega D	CICATA IPN Queretaro, Cerro Blanco 141, Colinas del Cimatario, Santiago de Queretaro Qro., Mexico			1
Garcia-Mena J	CINVESTAV, Departamento de Genetica y Biologia Molecular, Mexico D.F., Mexico			2
Pless RC	CICATA IPN Queretaro, Cerro Blanco 141, Colinas del Cimatario, Santiago de Queretaro Qro., Mexico			1
Rojasavelizapa NG	CICATA IPN Queretaro, Cerro Blanco 141, Colinas del Cimatario, Santiago de Queretaro Qro., Mexico			1
Rojas-Avelizapa LI	Escuela Nacional de Ciencias Biologicas-IPN. Mexico D.F., Mexico			2