On the basis of 25-year study on long-term located experiments of fertilizer,analysis is made on he change tendency of heavy-metal content in soil of 0~20 cm which are treatd with six different fertilization trails detailed as fertilizing by N,NP,NPK,N+organic fertilizer,N+straw and no fertilizer.
Due to the relative higher third-order nonlinear optical susceptibility, ultra-fast response speed and wider infrared transmittance window, the TeO_2-Nb_2O_5 heavy-metal oxide glass has become a kind of significantly promising material for nonlinear optical apparatus.
Genetic differentiation of Arthrobacter population from heavy metal-contaminated environment
canadensis has a high tolerance for contamination by heavy metal elements including Zn, Cu and Pb, but has low accumulation coefficients for these elements.3)S.
Heavy metal pollutants may enter the human food chain through agricultural products and groundwater from the polluted soils.
Therefore, new and effective methods to decrease the risk of heavy metal pollution in crops and to clean the contaminated soils are urgently needed.
According to the percentage of damaged DNA with tail and its TL/D (tail length to diameter of nucleus) value, the relationship between DNA damage degree and heavy metal dose and exposure time was determined.
The BET surface area was 298 m2·g-1 and the contents of heavy metals in the leachate didn't exceed the contents limit.
Our data provided evidence that genetic differentiation of microbial populations was consistent with the changes of environmental factors, particularly heavy metals.
Pollution of agricultural land by heavy metals has imposed an increasingly serious risk to environmental and human health in recent years.
If we can find crop germplasms that take in low concentrations of heavy metals in their edible parts and high content of the metals in their inedible parts, then we can use these selected species or varieties for soil remediation.
Effects of heavy metals Cd2+, Pb2+ and Zn2+ on DNA damage of loach Misgurnus anguillicaudatus
Design and synthesis of structurally well-defined functional polypropylenes via transition metal-mediated olefin polymerization
This paper summarizes our recent effort to access structurally well-defined functional polypropylenes via transition metal-mediated olefin polymerization.
XRD pattern and SEM micrograph showed a good dispersion of ammonium carnallite and anhydrous magnesium chloride crystals with well-distributed big grains, just enough to meet the need for the production of magnesium metal in the electrolysis process.
Syntheses and metal ions recognition of dendritic calix[n]arenes (n = 6,8) amide derivative
The recognition properties of these amide derivatives for several kinds of metal ions were studied with UV-Vis spectroscopy.
The procedures have been applied to the control of water purification and the determination of both heavy-metal ions and the KF-91 flocculant (2-methyl-N-methylpiridinium-5-polyvinyl methyl sulfate).
The chromatographic behavior of heavy-metal (Pb, Cd, Cu, Hg, and Ni) complexes of unithiol was studied by ion-pair reversed-phase chromatography using new ion-pair reagents: tetrabutylphosphonium and tributylhexadecylphosphonium bromides.
Enzyme assay is proposed for improving the selectivity of the determination of an organophosphorus (carbamate) insecticide in the presence of a heavy-metal salt in a sample (exemplified by a model system containing proserine and mercuric bromide).
Electrochemical Sample Preparation for the Voltammetric Determination of Heavy-Metal Ions in Wine
Study on the Determination of Heavy-Metal Ions in Tobacco and Tobacco Additives by Microwave Digestion and HPLC with PAD Detecti