Experiments were carried out to examine redox transformations of copper and chromium by acidophilic bacteria (Acidithiobacillus, Leptospirillum, and Acidiphilium), and also of iron (III) reduction by Acidithiobacillus spp. under aerobic conditions. Reduction of iron (III) was found with all five species of Acidithiobacillus tested, grown aerobically on elemental sulfur. Cultures maintained at p...

This study deals with the issue of copper separation from acidic etching solutions formed during process production printed circuit boards (PCBs) for electrical and electronic industries. The article describes selected methods summarizes results an experiment, in which efficiency recovery depleted acid by cementation precipitation method was verified. In cementation, iron form metallic swarf us...

From our experimental evidence that iron lirnitation greatly increases the extracellular concentration of strong copper-complexing agents in cultures of Anabaena flos-aquae and Anabaena cyhdrica, and that the iron-algal exudate complex is much more stable than the copper complex, we conclude that strong copper-complexing agents released by filamentous blue-green algae are siderophores. Further ...

Copper and iron serve essential functions as catalytic co-factors in a wide variety of critical cellular enzymes. Studies in yeast have demonstrated an absolute dependence upon copper acquisition for proper assembly and function of the iron transport machinery. We have cloned genes for a high affinity copper transporter (Ctr4) and copper-sensing transcription factor (Cuf1) from Schizosaccharomy...

For well over 30 y, it has been known that at the absorptive and metabolic levels, minerals, both macro and trace, interact with one another. With the knowledge gained in the same time span, greater insight has been established as to how the stores of a particular mineral may regulate the absorption of that same mineral. Additionally, we have a greater understanding of how the concentrations of...

Copper, zinc, and iron were quantitated in the serum and lymphoid cells of the peripheral blood of healthy children and children with acute lymphocytic leukemia. Copper and iron con centrations in serum and cells were significantly higher and zinc concentration in the cells significantly lower in leukemic patients than in healthy donors, whereas the increase of zinc in the serum was not signifi...

Copper, zinc, and iron were quantitated in the serum and lymphoid cells of the peripheral blood of healthy children and children with acute lymphocytic leukemia. Copper and iron concentrations in serum and cells were significantly higher and zinc concentration in the cells significantly lower in leukemic patients than in healthy donors, whereas the increase of zinc in the serum was not signific...

Flame atomic absorption spectrometry (FAAS) was adopted to detect the construction vehicles automatic transmission through simultaneous determination of typical metal elements contents (Copper, Chromium and Iron) in automatic transmission fluid (ATF). Standard curves of Copper, Chromium and Iron were portrayed. Six parallel tests were implemented and the relative standard deviations (RSD) were ...

The aims of this study were to evaluate zinc, copper, and iron concentrations in the transitory milk of Korean lactating mothers and to investigate the relationship between these concentrations and maternal diet. Human milk samples were collected between 5 and 15 days postpartum from 96 healthy, lactating mothers in postpartum care centers in Seoul, Korea. Dietary intake during lactation was de...

Iron and copper are essential nutrients for life as they are required for the function of many proteins but can be toxic if present in excess. Accumulation of these metals in the human body as a consequence of overload disorders and/or high environmental exposures has detrimental effects on health. The budding yeast Saccharomyces cerevisiae is an accepted cellular model for iron and copper meta...