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The polycyclic aromatic hydrocarbons (PAHs) of 55 surface soil samples from the wetlands in the Liao River Delta, Northeast China were measured in order to apportion their sources. The total concentrations of 16 US EPA priority PAHs and alkyl-PAHs in this region ranged 106-3148 ng g⁻¹ (dry weight) (average: 550 ± 565 ng g⁻¹) and 54-5564 ng g⁻¹ (average: 517(More)
PAH concentrations of 61 surface soil samples collected from the Yellow River Delta (YRD), China were measured to determine occurrence levels, sources, and potential toxicological significance of PAHs. The total concentrations of ∑PAHs ranged from 27 to 753 ng/g d.w., with a mean of 118±132 ng/g. The highest concentrations was found in the mid-southern part(More)
Total organic carbon, total nitrogen, δ(13)Corg, δ(15)N, and aliphatic and polyaromatic hydrocarbons of fifty-five soil samples collected from the coastal wetlands of the Liaohe Delta were measured, in order to determine the sources and possible preservation of organic matter (OM). The δ(15)N and δ(13)Corg values in the samples ranged from 3.0‰ to 9.4‰ and(More)
Global management of wetlands to suppress greenhouse gas (GHG) emissions, facilitate carbon (C) sequestration, and reduce atmospheric CO2 concentrations while simultaneously promoting agricultural gains is paramount. However, studies that relate variability in CO2 and CH4 emissions at large spatial scales are limited. We investigated three-year emissions of(More)
Precise genome editing in livestock is of great value for the fundamental investigation of disease modeling. However, genetically modified pigs carrying subtle point mutations were still seldom reported despite the rapid development of programmable endonucleases. Here, we attempt to investigate single-stranded oligonucleotides (ssODN) mediated knockin by(More)
Nanoplates of Mn3O4 were prepared by redox reactions of Mn(CH3COO)2 x 4H2O taking place in short chain n-alkylamine aqueous solutions such as n-butylamine, n-propylamine and n-hexylamine at room temperature. Phase purity was confirmed by powder X-ray diffraction. The high resolution transmission electron microscopy revealed the rectangle shape of Mn3O4(More)
Two new isostructural metal borophosphates, |K2(H2O)|[CoB2P3O12(OH)] [M = Co (1), Ni (2)], have been hydrothermally synthesized with non-polluting K(+) ions instead of organic template-ethylenediamine. The two metal borophosphates are isostructural and constructed by the connection of tetrahedral layers and MO6 octahedra, giving rise to the 3-D intersecting(More)
Heavy metals (As, Cd, Cr, Cu, Hg, Pb, Zn), organic carbon and grain size of 237 surface sediment samples and one sediment core, taken from the west Guangdong coastal region in January 2008, were analyzed to evaluate the spatial distribution and pollution status. Results show that the ranges of the measured heavy metal concentrations in sediments are as(More)
Heavy metal (arsenic (As), cadmium (Cd), chromium (Cr), copper (Cu), mercury (Hg), lead (Pb), and zinc (Zn)) concentrations from the Daya Bay and adjacent shelf were determined to evaluate their levels and spatial distributions. The measured concentrations ranged from 1.94-13.67mg/kg for As, 0.03-0.13mg/kg for Cd, 10-85mg/kg for Cr, 1-39.5mg/kg for Cu,(More)