Biology of Metals
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Investigating the phytoavailability of metals in roots of Croton macrostachyus and Phytolacca dodecandra: induced rhizosphere processes
Biology of Metals - Tập 36 - Trang 1347-1359 - 2023
Medicinal plants are key component of complementary and alternative medicine, and constitute the first therapeutic strategy for majority of the global population, particularly in developing nations. Croton macrostachyus and Phytolacca dodecandra are among such plants, widely used to treat various diseases. The present study aimed at investigating the elemental composition of both plant root sample......
Dental amalgam and mercury
Biology of Metals - Tập 2 - Trang 25-30 - 1989
Mercury concentration in intraoral air and urine of seven females with dental amalgam was measured before and after intake of one hard-boiled egg. A considerable decrease in mercury concentration in intraoral air was found. Twenty women with about equal dental amalgam status, with or without subjective symptoms related to dental amalgam, were also studied. Mercury concentrations in intraoral air a......
Analytical studies on the incorporation of aluminium in the cell walls of the marine diatom Stephanopyxis turris
Biology of Metals - Tập 26 - Trang 141-150 - 2012
The eukaryotic diatoms are unicellular algae. They are well known for their filigree micro- and nanostructured cell walls which mainly consist of amorphous silica as well as various organic compounds. However, diatoms are also known to incorporate certain amounts of aluminium into their cell walls. Unexpectedly, enhanced Al concentrations in the Southern Yellow Sea were found to be correlated with......
Transferrin response in normal and iron-deficient mice heterozygotic for hypotransferrinemia; effects on iron and manganese accumulation
Biology of Metals - Tập 11 - Trang 265-276 - 1998
Hypotransferrinemia is a genetic defect in mice resultingin 1% of normal plasma transferrin (Tf) concen-trations;heterozygotes for thismutation (+/hpx) have low circulating Tf concentrations. These mice providea unique opportunity toexamine the developmental pattern and response of Tf to iron-deficient diets, andfurthermore,to address the controversial role of Tf in Mn transport. Twenty-three wean......
Point mutations change specificity and kinetics of metal uptake by ZupT from Escherichia coli
Biology of Metals - Tập 23 - Trang 643-656 - 2010
The ZIP (ZRT-, IRT-like Protein) protein ZupT from Escherichia coli is a transporter with a broad substrate range. Phenotypic and transport analysis showed that ZupT, in addition to Zn(II), Fe(II) and Co(II) uptake, is also involved in transport of Mn(II) and Cd(II). Competition experiments with other substrate cations suggested that ZupT has a slight preference for Zn(II) and kinetic parameters f......
XAS analysis of a nanostructured iron polysaccharide produced anaerobically by a strain of Klebsiella oxytoca
Biology of Metals - Tập 25 - Trang 875-881 - 2012
A strain of Klebsiella oxytoca, isolated from acid pyrite-mine drainage, characteristically produces a ferric hydrogel, consisting of branched heptasaccharide repeating units exopolysaccharide (EPS), with metal content of 36 wt%. The high content of iron in the EPS matrix cannot be explained by a simple ferric ion bond to the sugar skeleton. The bio-generated Fe–EPS is investigated by X-ray absorp......
Kinetics of the early subcellular distribution of cadmium in rat hepatocytes
Biology of Metals - Tập 18 - Trang 255-267 - 2005
The kinetics of the early subcellular distribution of cadmium (Cd) was characterized in primary cultures of rat hepatocytes exposed to 10, 50 and 100 μM Cd in a serum-free WME medium for 10, 30 or 60 min. Our results demonstrate a time- and concentration-dependent increase in Cd content with the highest metal concentration measured in the cytosol, whereas the lowest was observed in the mitochondri......
Prooxidant Action of Maltol: Role of Transition Metals in the Generation of Reactive Oxygen Species and Enhanced Formation of 8-hydroxy-2′-deoxyguanosine Formation in DNA
Biology of Metals - Tập 19 - Trang 253-257 - 2006
Maltol (3-hydroxy-2-methyl-4-pyrone) produced reactive oxygen species as a complex with transition metals. Maltol/iron complex inactivated aconitase the most sensitive enzyme to oxidative stress. The inactivation of aconitase was iron-dependent, and prevented by TEMPOL, a scavenger of reactive oxygen species, suggesting that the maltol/iron-mediated generation of superoxide anion is responsible fo......
Molecular analysis of iron transport in plant growth-promotingPseudomonas putida WCS358
Biology of Metals - Tập 4 - Trang 36-40 - 1991
Root-colonizingPseudomonas putida WCS358 enhances growth of potato in part by producing under iron-limiting conditions a yellow-green, fluorescent siderophore designated pseudobactin 358. This siderophore efficiently complexes iron(III) in the rhizosphere, making it less available to certain endemic microorganisms, including phytopathogens, thus inhibiting their growth. At least 15 genes distribut......
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