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1.
Environ Sci Pollut Res Int ; 31(4): 5596-5609, 2024 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-38127234

RESUMO

Bacteria from resource islands can adapt to different extreme conditions in semi-arid regions. We aimed to determine the potential resistance and tolerance to heavy metals from the bacterial community under the canopy of three resource islands in a semi-arid zone of the Colombian Caribbean. Total DNA was extracted from soil and through a metagenomics approach, we identified genes related to heavy metal tolerance and resistance under the influence of drought and humidity conditions, as well as the presence or absence of vegetation. We characterized the genomes of bacterial isolates cultivated in the presence of four heavy metals. The abundances of genes related to heavy metal resistance and tolerance were favored by soil moisture and the presence of vegetation. We observed a high abundance of resistance genes (60.4%) for Cu, Zn, and Ni, while 39.6% represented tolerance. These genes positively correlated with clay and silt content, and negatively correlated with sand content. Resistance and tolerance were associated with detoxification mechanisms involving oxidoreductase enzymes, metalloproteases, and hydrolases, as well as transmembrane proteins involved in metal transport such as efflux pumps and ion transmembrane transporters. The Bacillus velezensis C3-3 and Cytobacillus gottheilii T106 isolates showed resistance to 5 mM of Cd, Co, Mn, and Ni through detoxification genes associated with ABC pumps, metal transport proteins, ion antiporter proteins, and import systems, among others. Overall, these findings highlight the potential of bacteria from resource islands in bioremediation processes of soils contaminated with heavy metals.


Assuntos
Metais Pesados , Poluentes do Solo , Colômbia , Metais Pesados/análise , Bactérias/genética , Bactérias/metabolismo , Solo , Metagenômica , Região do Caribe , Poluentes do Solo/análise
2.
Rev. colomb. enferm ; 4(4): 26-38, oct.-dic. 2009.
Artigo em Espanhol | LILACS, BDENF - Enfermagem | ID: lil-616035

RESUMO

El desplazamiento en Colombia genera alta vulnerabilidad en la población juvenil, cuya salud sexual y reproductiva es motivo de interés público, dadas ciertas problemáticas, como el incremento del embarazo a temprana edad. Se abordó, desde un enfoque cualitativo de tipo participativo, el significado que le dan a ‗la pareja‘ dentro de sus proyectos de vida un grupo de 32 adolescentes de ambos sexos, habitantes de Soacha, zona receptora de población desplazada. Mediante el taller de reflexión–creación ‗En–Pareja–2‘, los(as) jóvenes destacaron que, en su contexto cultural, marcado por la violencia y la inequidad, la pareja surge como alternativa frente a sus carencias afectivas y sociales. Como problemáticas asociadas a la pareja enuncian el embarazo a edad temprana, la falta de un ejercicio consciente de la sexualidad, el inicio temprano de relaciones sexuales sin protección, la violencia sexual intrafamiliar y falencias en cuanto a valores éticos en el contexto. Proponen, como alternativas, el diálogo intrafamiliar y de pareja, la formación para una ética en las relaciones afectivas y para la equidad de género en la pareja y una educación sexual más dinámica y ajustada a sus necesidades.


Assuntos
Adolescente , Comportamento do Adolescente , Gravidez na Adolescência , Parceiros Sexuais , Refugiados , Saúde Reprodutiva , Colômbia
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