13 documents found, page 1 of 2

Investigation of Protein Biomarkers and Oxidative Stress in Pinirampus pirinamp...

Made available in DSpace on 2022-04-28T19:44:14Z (GMT). No. of bitstreams: 0 Previous issue date: 2022-04-01; In recent decades, the scientific community has widely debated the contamination of fish in the Amazon region by mercury species. As the diet of riverside populations in the Amazon region is based mainly on fish, these populations are exposed to mercurial species that can cause serious and irreversible ...

Distribuição de Cr, Ni, Cu, Cd e Pb em frações húmicas de diferentes tamanhos m...

Made available in DSpace on 2022-04-29T08:47:20Z (GMT). No. of bitstreams: 0 Previous issue date: 2002-12-01; In this work was studied the distribution of Cr, Ni, Cu, Cd and Pb in humic fractions with different molecular size. The HS were extracted from waters (AHS), surface sediments (HSSS), interface water sediment (HSIS) and bottom sediment (HSBS) collected in the Anhumas surface water collection reservoir, ...

Substâncias húmicas: sistema de fracionamento sequencial por ultrafiltração com...

Aquatic humic substances: Molecular size fractionation and characterization of ...

The aquatic humic substances (AHS) investigated in this study were conventionally isolated from Rio Negro waters - Amazonas State/ Brazil by means of the collector XAD 8. A special five-stage tangential-flow ultrafiltration device was used for analytical fractionation of AHS. The fractionation patterns (6 fractions each) showed that metal traces remaining in AHS after their XAD 8 isolation have different size d...

Extraction of aquatic organic matter by temperature decreasing: An alternative ...

In this work was developed an alternative methodology to separation of aquatic organic matter (AOM) present in natural river waters. The process is based in temperature decreasing of the aqueous sample under controlled conditions that provoke the freezing of the sample and separation of the dark extract, not frozen and rich in organic matter. The results showed that speed of temperature decreasing exerts strong...

Substâncias húmicas aquáticas: fracionamento moleular e caracterização de rearr...

Extração de matéria orgânica aquática por abaixamento de temperatura: uma metod...

Mercury (II) reduction by aquatic humic substances from ?Rio Negro? - Amazonas ...

Humic substances: A sequential device for fractionation by ultrafiltration with...

A sequential system for fractionation by ultrafiltration (SSFU) equipped with advanced membranes filters (molecular size cut-off: 5, 10, 30, 50 and 100 kDalton) of the polyethersulfone type was developed for analytical fractionation of humic substances (HS) extracted from aquatic systems or soils. The device consists of five membrane filters (Sartocon® Micro) operated by a multi-channel peristaltic pump, enabli...

Metalloproteomic approach of mercury-binding proteins in liver and kidney tissu...

Made available in DSpace on 2020-12-12T01:08:47Z (GMT). No. of bitstreams: 0 Previous issue date: 2020-04-01; Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq); Fish is an important source of protein, vitamins, and minerals. However, this food is also a major source of human exposure to toxic contaminants such as mercury. Thus, this paper aimed to evaluate mercury-binding proteins for possibl...