Zn Hg Interaction
Mostrando 1-7 de 7 artigos, teses e dissertações.
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1. PHYSIOLOGICAL EFFECTS OF MERCURY IN PLANTS OF Pfaffia glomerata (Spreng.) Pedersen / EFEITOS FISIOLÓGICOS DO MERCÚRIO EM PLANTAS DE Pfaffia glomerata (Spreng.) Pedersen
Mercury (Hg) is a highly toxic non-essential heavy metal. Soil, water and air contamination by Hg leads to its accumulation in fish, birds and mammals, thus entering human food. Due to the hazardous effects to the ecosystem, it is necessary that contaminated soils be rehabilitated. Phytoremediation is a cheap technique that can be utilizated with this object
Publicado em: 2009
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2. Nonspecific nature of the stimulus to DNA synthesis in cultures of chick embryo cells.
The rate of DNA synthesis in chick embryo cultures deprived of serum is stimulated 5- to 20-fold by a large variety of substances, including subtoxic concentrations of certain metal ions such as Zn++, Cd++, and Hg++. The stimulatory concentrations of Zn++ and Cd++ have sharp optima, which are just below the concentrations that produce frank morphological dam
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3. Purification and Characterization of an X-Prolyl-Dipeptidyl Peptidase from Lactobacillus sakei
An X-prolyl-dipeptidyl peptidase has been purified from Lactobacillus sakei by ammonium sulfate fractionation and five chromatographic steps, which included hydrophobic interaction, anion-exchange chromatography, and gel filtration chromatography. This procedure resulted in a recovery yield of 7% and an increase in specificity of 737-fold. The enzyme appeare
American Society for Microbiology.
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4. Precipitation of Metallic Cations by the Acidic Exopolysaccharides from Bradyrhizobium japonicum and Bradyrhizobium (Chamaecytisus) Strain BGA-1
The interaction between the acidic exopolysaccharides produced by two Bradyrhizobium strains and several metal cations has been studied. Aqueous solutions in the millimolar range of Fe3+ but not of Fe2+ precipitated the exopolysaccharides from Bradyrhizobium (Chamaecytisus) strain BGA-1 and, to a lesser extent, Bradyrhizobium japonicum USDA 110. The precipit
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5. Purification and Characterization of an Arginine Aminopeptidase from Lactobacillus sakei
An arginine aminopeptidase (EC 3.4.11.6) that exclusively hydrolyzes basic amino acids from the amino (N) termini of peptide substrates has been purified from Lactobacillus sakei. The purification procedure consisted of ammonium sulfate fractionation and three chromatographic steps, which included hydrophobic interaction, gel filtration, and anion-exchange c
American Society for Microbiology.
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6. Purification and characterization of a cell wall peptidase from Lactococcus lactis subsp. cremoris IMN-C12.
A peptidase from the cell wall fraction of Lactococcus lactis subsp. cremoris IMN-C12 has been purified to homogeneity by hydrophobic interaction chromatography, two steps of anion-exchange chromatography, and gel filtration. The molecular mass of the purified enzyme was estimated to be 72 kDa by gel filtration and 23 kDa by sodium dodecyl sulfate-polyacryla
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7. Cytoplasmic proteins of Streptococcus mutans (serotype c) and their interaction with fluoride.
The protein profile of the cytoplasmic proteins of Streptococcus mutans GS-5 was determined by two-dimensional gel electrophoresis. Use of this recently developed, high-resolution analytical tool showed in excess of 140 cytoplasmic proteins. The profile consisted of mostly acidic components with pI values between 3.70 and 5.30 and relative molecular weights