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  • 1
    Keywords: Freshwater ecology. ; Marine ecology. ; Environmental chemistry. ; Environment. ; Environmental monitoring. ; Freshwater and Marine Ecology. ; Environmental Chemistry. ; Environmental Sciences. ; Environmental Monitoring.
    Description / Table of Contents: Introduction -- Physical Geography -- Pollution in the Pearl River Estuary -- Trace Metals in the Water Column and Sediments -- Trace Metals in Pearl River Estuary Organisms -- Trace Metal Contamination of Seafood from the Pearl River Estuary -- Trace Metals and Ecotoxicological Effects in the Pearl River Estuary -- Future needs.
    Abstract: The Pearl River Estuary (PRE) is the Western name for a very large estuary in southern China that is currently home to an industrial metropolis of staggering size, and one that is rapidly evolving. The Chinese name for the Pearl River is Zhujiang. Guangzhou lies at the head of the estuary, and Macau and Hong Kong are on the western and eastern sides, respectively, of the wide opening of the estuary to the South China Sea. The new cities of Zhuhai and Shenzhen lie immediately north of Macau and Hong Kong, respectively. The recent establishment of the Greater Bay Area (GBA), which covers the majority of the Pearl River Delta area, with a total population of over 70 million, will certainly put the PRE under strict environmental scrutiny. The PRE system itself will provide a model system for environmental scientists owing to its major anthropogenic perturbation and influences, as well as the highly dynamic nature of the estuary. This book addresses the major environmental concerns regarding this estuary, contaminants and other pollutants, e.g. toxic metals, organic contaminants and emerging compounds. Questions addressed here include: What are the sources of the contaminants? What have the environmental consequences of these contaminants been for the estuary? What will the future bring? The research presented here on the Pearl River Estuary offers a wealth of insights for other major contaminated estuaries around the world.
    Type of Medium: Online Resource
    Pages: XI, 125 p. 27 illus., 17 illus. in color. , online resource.
    Edition: 1st ed. 2020.
    ISBN: 9783662618349
    Series Statement: Estuaries of the World,
    DDC: 577.6
    Language: English
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  • 2
    ISSN: 1520-4995
    Source: ACS Legacy Archives
    Topics: Biology , Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Biochemistry 27 (1988), S. 5268-5274 
    ISSN: 1520-4995
    Source: ACS Legacy Archives
    Topics: Biology , Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Macromolecules 28 (1995), S. 5554-5560 
    ISSN: 1520-5835
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Analytical chemistry 55 (1983), S. 1202-1204 
    ISSN: 1520-6882
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    s.l. ; Stafa-Zurich, Switzerland
    Solid state phenomena Vol. 121-123 (Mar. 2007), p. 533-536 
    ISSN: 1662-9779
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Physics
    Notes: We designed the monolithic opto-electronic integrated circuit composed by ResonantTunnelling Diodes (RTD) and Heterojunction Phototransistor (HPT). Circuit simulation of RTD andHPT integration is firstly processed. The material structure and technological process of the device isintroduced in detail. A good characteristic is obtained with high Peak-to-valley current ratio
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    s.l. ; Stafa-Zurich, Switzerland
    Solid state phenomena Vol. 121-123 (Mar. 2007), p. 1459-1462 
    ISSN: 1662-9779
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Physics
    Notes: The nano-CaCO3/Acrylonitrile-Butadiene-Styrene (ABS) composites were prepared bymelting-blend with the single-screw extruder. The mechanical properties of the nanocomposites andthe dispersion of nano-CaCO3 were investigated by means of transmission electron microscopy(TEM) and mechanical tests. The micro structure of the fracture section of the nanocomposites wasanalyzed by means of scanning electron microscopy (SEM). The results show that not only theimpact property but also the rigidity property and the bending modulus of the system have beenincreased evidently by added modificated nano-CaCO3. However, the tensile strength of thenano-composites has a little decreased by added the modificated nano- CaCO3. The modificatednano-CaCO3 has been dispersed well in the matrix in the nanometer scale. The micro structure ofthe fracture section of the nanocomposites proved that when the composites have been impacted,the modificated nano-CaCO3 particles have taken an action of initiating and terminating crazing(silver streak), which can absorb more impact energy than the pure ABS resin. Compared with thepure ABS resin material, the notched impact strength of the nano-CaCO3/ABS composites added 2percent hundred resin (PHR) modificated nano-CaCO3 reach 36.77 kJ/m2, which have beenincreased up to 44%. At the same time, the rigidity of the nanocomposites has also been enhancedby 23.5% which is increased from 28.16N to 34.87 N
    Type of Medium: Electronic Resource
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  • 8
    ISSN: 1662-9779
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Physics
    Notes: Thermal analysis and Raman spectra were carried out in SrBi2Ta2O9 (SBT) nanoparticlesto investigate phase transitions. Two anomalies have been observed in temperature dependence ofspecific heat for SBT nanoparticles. Under the combination with Raman spectra, it indicates that thereexists a new ferroelectric intermediate phase in the phase-transition sequence. So we can concludethat the phase-transition sequence in SBT nanoparticles should beferroelectric-ferroelectric-paraelectric. Moreover, the size effect was discussed in consideration ofinner compressive stress in nanoparticles for this special transition behavior. The calculated resultsshow that the SBT nanoparticles keep the ferroelectricity until the particle size is decreased to 4.2 nm
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Springer
    Marine biology 137 (2000), S. 567-575 
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract  The accumulation and depuration of Cs in the green mussels (Perna viridis) commonly found in the subtropical and tropical waters were studied under the laboratory conditions using radiotracer techniques. Following an initial rapid sorption onto the mussel's tissues, uptake of Cs exhibited linear patterns over a short exposure time (8 h) at different ambient Cs concentrations. The concentration factor was independent of ambient Cs concentration. The calculated uptake rate and initial sorption constant of Cs were directly proportional to the ambient Cs concentration. The calculated uptake rate constant from the dissolved phase in the mussels was as low as 0.026 l g−1 d−1. Uptake rates of Cs in the mussels were inversely related to the ambient salinity. Uptake increased about twofold when the salinity was reduced from 33 to 15 ppt. The effect of salinity on Cs uptake was primarily due to the change in ambient K+ concentration. The uptake rate decreased in a power function with increasing tissue dry weight of the mussels, although the initial sorption was not related to the mussel's body size. The efflux rate constant of Cs in the mussels was 0.15 to 0.18 d−1, and was the highest recorded to date among different metals in marine bivalves. The efflux rate constant also decreased in a power function with increasing tissue dry weight of mussels. A simple kinetic model predicted that the bioconcentration factor of Cs in the green mussels was 145, which was higher than measurements taken in their temperate counterparts. The bioconcentration factor also decreased in a power function with increasing tissue dry weight of mussels.
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Springer
    Marine biology 135 (1999), S. 11-23 
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract  We measured the uptake kinetics of four metals (Cd, Cr, Se and Zn) in two marine macroalgae (the green alga Ulva lactuca and the red alga Gracilaria blodgettii). Metal uptake generally displayed a linear pattern with increasing exposure time. With the exception of Cr, which exhibited comparable uptake rate constants at different concentrations, uptake rate constants of Cd, Se and Zn decreased with increasing metal concentration, indicating that the seaweeds had a higher relative uptake at lower metal concentration. Uptake of Cd and Zn was higher in U. lactuca than in G. blodgettii, whereas uptake of Cr and Se was comparable between the two species. Only Cd and Zn uptake in U. lactuca was significantly inhibited by dark exposure. A decrease in salinity from 28 to 10‰ enhanced the uptake of Cd, Cr, Se and Zn in U. lactuca 1.9-, 3.0-, 3.6-, and 1.9-fold, respectively. In G. blodgettii, Cd uptake increased twofold when salinity was decreased from 28 to 10‰, whereas uptake of Cr and Zn was not significantly affected by salinity change. The calculated depuration rate constants of metals in U. lactuca were 0.01 d−1 for Cd, 0.05 to 0.08 d−1 for Cr, 0.14 to 0.16 d−1 for Se, and 0.12 to 0.15 d−1 for Zn, and were relatively independent of the metal body burden in the algae. The predicted bioconcentration factor was 3 × 104 for Cd, 2 × 103 for Cr, 40 to 150 for Se, and 1 to 2 × 104 for Zn in U. lactuca. Our kinetic study suggested that U. lactuca would be a good biomonitor of Cr and Zn contamination in coastal waters.
    Type of Medium: Electronic Resource
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