Biomineralization and biosynthesis of nanocrystalline materials and selective uptake of toxic metals controlled by five types of Candida species
Por:
Romero-Nunez, Araceli, Gonzalez, Gonzalo, Moreno, Abel, Cuellar-Cruz, Mayra
Publicada:
1 ene 2019
Resumen:
The use of microorganisms for in vivo synthesis of quantum dots (QDs) not only makes it possible to obtain useful materials with tunable characteristics under mild conditions, but can also ensure the removal of toxic heavy metals from polluted water systems. Because real water treatment schemes contain more than one pollutant, this work attempted to determine the responses of Candida to exposure to two cations with known different survival pathways: Pb(ii) and Cd(ii). Five Candida species, C. albicans, C. dubliniensis, C. glabrata, C. krusei, and C. parapsilosis, were exposed to a 1 : 1 mixture of the aforementioned cations. The heterogeneous uptake of each metal was defined for the different strains; the removal of cadmium was greater than that of lead. The specific pathway followed by each cation led to the biomineralization of heterogeneous PbS- and CdS-based QDs located extra- or intra-cellularly. The structures and properties of the obtained heterogeneous nanomaterials were characterized by different techniques, and the results highlight the potential of Candida to form useful materials from a complex metal mixture. © The Royal Society of Chemistry.
Filiaciones:
Romero-Nunez, Araceli:
Departamento de Biología, División de Ciencias Naturales y Exactas, Campus Guanajuato, Universidad de Guanajuato, Noria Alta S/N, Col. Noria Alta, Guanajuato, GTO C.P. 36050, Mexico
Univ Guanajuato, Dept Biol, Div Ciencias Nat & Exactas, Campus Guanajuato,Noria Alta S-N, Guanajuato 36050, Gto, Mexico
Gonzalez, Gonzalo:
Departamento de Metálicos y Cerámicos, Instituto de Investigaciones en Materiales, Universidad Nacional Autónoma de México, Circuito exterior S/N, Col. Universidad Nacional, Coyoacán, 04510, Mexico
Univ Nacl Autonoma Mexico, Dept Met & Ceramicos, Inst Invest Mat, Circuito Exterior S-N, Coyoacan 04510, Cdmx, Mexico
Moreno, Abel:
Instituto de Química, Universidad Nacional Autónoma de México, Av. Universidad 3000, Ciudad Universitaria, Ciudad de México, 04510, Mexico
Univ Nacl Autonoma Mexico, Inst Quim, Ave Univ 3000,Ciudad Univ, Mexico City 04510, DF, Mexico
Cuellar-Cruz, Mayra:
Departamento de Biología, División de Ciencias Naturales y Exactas, Campus Guanajuato, Universidad de Guanajuato, Noria Alta S/N, Col. Noria Alta, Guanajuato, GTO C.P. 36050, Mexico
Instituto de Química, Universidad Nacional Autónoma de México, Av. Universidad 3000, Ciudad Universitaria, Ciudad de México, 04510, Mexico
Univ Guanajuato, Dept Biol, Div Ciencias Nat & Exactas, Campus Guanajuato,Noria Alta S-N, Guanajuato 36050, Gto, Mexico
Univ Nacl Autonoma Mexico, Inst Quim, Ave Univ 3000,Ciudad Univ, Mexico City 04510, DF, Mexico
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