GLORIA

GEOMAR Library Ocean Research Information Access

X

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
Filter
  • Hindawi Limited  (4)
  • He, Wei  (4)
Material
Publisher
  • Hindawi Limited  (4)
Person/Organisation
Language
Years
  • 1
    Online Resource
    Online Resource
    Residues, Distributions, Sources, and Ecological Risks of OCPs in the Water from Lake Chaohu, China
    Hindawi Limited ; 2012
    In:  The Scientific World Journal Vol. 2012 ( 2012), p. 1-16
    Details
    In: The Scientific World Journal, Hindawi Limited, Vol. 2012 ( 2012), p. 1-16
    Abstract: The levels of 18 organochlorine pesticides (OCPs) in the water from Lake Chaohu were measured by a solid phase extraction-gas chromatography-mass spectrometer detector. The spatial and temporal distribution, possible sources, and potential ecological risks of the OCPs were analyzed. The annual mean concentration for the OCPs in Lake Chaohu was 6.99 ng/L. Aldrin, HCHs, and DDTs accounted for large proportions of the OCPs. The spatial pollution followed the order of Central Lakes  〉  Western Lakes  〉  Eastern Lakes and water area. The sources of the HCHs were mainly from the historical usage of lindane. DDTs were degraded under aerobic conditions, and the main sources were from the use of technical DDTs. The ecological risks of 5 OCPs were assessed by the species sensitivity distribution (SSD) method in the order of heptachlor  〉   γ -HCH  〉  p,p′-DDT 〉 aldrin  〉  endrin. The combining risks of all sampling sites were MS  〉  JC  〉  ZM 〉  TX, and those of different species were crustaceans  〉  fish  〉  insects and spiders. Overall, the ecological risks of OCP contaminants on aquatic animals were very low.
    Type of Medium: Online Resource
    ISSN: 1537-744X
    URL: Article
    DOI: 10.1100/2012/897697
    Language: English
    Publisher: Hindawi Limited
    Publication Date: 2012
    detail.hit.zdb_id: 2075968-X
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 2
    Online Resource
    Online Resource
    Toxic Effects of Ethyl Cinnamate on the Photosynthesis and Physiological Characteristics of Chlorella vulgaris Based on Chlorophyll Fluorescence and Flow Cytometry Analysis
    Hindawi Limited ; 2015
    In:  The Scientific World Journal Vol. 2015 ( 2015), p. 1-12
    Details
    In: The Scientific World Journal, Hindawi Limited, Vol. 2015 ( 2015), p. 1-12
    Abstract: The toxic effects of ethyl cinnamate on the photosynthetic and physiological characteristics of Chlorella vulgaris were studied based on chlorophyll fluorescence and flow cytometry analysis. Parameters, including biomass, F v / F m (maximal photochemical efficiency of PSII), Ф PSII (actual photochemical efficiency of PSII in the light), FDA, and PI staining fluorescence, were measured. The results showed the following: (1) The inhibition on biomass increased as the exposure concentration increased. 1 mg/L ethyl cinnamate was sufficient to reduce the total biomass of C. vulgaris . The 48-h and 72-h EC50 values were 2.07 mg/L (1.94–2.20) and 1.89 mg/L (1.82–1.97). (2) After 24 h of exposure to 2–4 mg/L ethyl cinnamate, the photosynthesis of C. vulgaris almost ceased, manifesting in Ф PSII being close to zero. After 72 h of exposure to 4 mg/L ethyl cinnamate, the F v / F m of C. vulgaris dropped to zero. (3) Ethyl cinnamate also affected the cellular physiology of C. vulgaris , but these effects resulted in the inhibition of cell yield rather than cell death. Exposure to ethyl cinnamate resulted in decreased esterase activities in C. vulgaris , increased average cell size, and altered intensities of chlorophyll a fluorescence. Overall, esterase activity was the most sensitive variable.
    Type of Medium: Online Resource
    ISSN: 2356-6140 , 1537-744X
    URL: Article
    DOI: 10.1155/2015/107823
    Language: English
    Publisher: Hindawi Limited
    Publication Date: 2015
    detail.hit.zdb_id: 2075968-X
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 3
    Online Resource
    Online Resource
    Distributions, Sources, and Backward Trajectories of Atmospheric Polycyclic Aromatic Hydrocarbons at Lake Small Baiyangdian, Northern China
    Hindawi Limited ; 2012
    In:  The Scientific World Journal Vol. 2012 ( 2012), p. 1-13
    Details
    In: The Scientific World Journal, Hindawi Limited, Vol. 2012 ( 2012), p. 1-13
    Abstract: Air samples were collected seasonally at Lake Small Baiyangdian, a shallow lake in northern China, between October 2007 and September 2008. Gas phase, particulate phase and dust fall concentrations of polycyclic aromatic hydrocarbons (PAHs) were measured using a gas chromatograph-mass spectrometer (GC-MS). The distribution and partitioning of atmospheric PAHs were studied, and the major sources were identified; the backward trajectories of air masses starting from the center of Lake Small Baiyangdian were calculated for the entire year. The following results were obtained: (1) The total concentration of 16 priority controlled PAHs (PAH16) in the gas phase was 417.2 ± 299.8  ng·m −3 , in the particulate phase was 150.9 ± 99.2  ng·m −3 , and in dust fall was 6930.2 ± 3206.5  ng·g −1 . (2) Vehicle emission, coal combustion, and biomass combustion were the major sources in the Small Baiyangdian atmosphere and accounted for 28.9%, 45.1% and 26.0% of the total PAHs, respectively. (3) Winter was dominated by relatively greater PAHs polluted northwesterly air mass pathways. Summer showed a dominant relatively clean southern pathway, whereas the trajectories in autumn and spring might be associated with high pollution from Shanxi or Henan province.
    Type of Medium: Online Resource
    ISSN: 1537-744X
    URL: Article
    DOI: 10.1100/2012/416321
    Language: English
    Publisher: Hindawi Limited
    Publication Date: 2012
    detail.hit.zdb_id: 2075968-X
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 4
    Online Resource
    Online Resource
    Levels, Temporal-Spatial Variations, and Sources of Organochlorine Pesticides in Ambient Air of Lake Chaohu, China
    Hindawi Limited ; 2012
    In:  The Scientific World Journal Vol. 2012 ( 2012), p. 1-12
    Details
    In: The Scientific World Journal, Hindawi Limited, Vol. 2012 ( 2012), p. 1-12
    Abstract: The residual levels of OCPs in the gas phase and particle phase in Lake Chaohu, China, were measured using GC-MS from March 2010 to February 2011. The temporal-spatial variations and sources of OCPs were also analyzed. Twenty types of OCPs were detected in the gas phase with a total concentration of 484.8 ± 550.4  pg/m 3 . Endosulfan, DDTs and chlordane were the primary OCPs in the gas phase. The mean concentration of OCPs in the gas phase was significantly higher in the summer than in the winter. Seventeen types of OCPs were detected in the particle phase with a total concentration of 18.3 ± 26.1 pg/m 3 . DDTs were major OCPs in the particle phase. The mean concentration of OCPs in the particle phase decreased at first and then increased during the period. The potential source of the HCHs in ambient air of Lake Chaohu might come from recent lindane usage. DDTs mainly came from historical dicofol usage, and an input of DDT was observed in the spring, which may result from the present use of marine paint that contains technical DDT. Endosulfan and chlordane in the air may be due to the present use of technical endosulfan and chlordane.
    Type of Medium: Online Resource
    ISSN: 1537-744X
    URL: Article
    DOI: 10.1100/2012/504576
    Language: English
    Publisher: Hindawi Limited
    Publication Date: 2012
    detail.hit.zdb_id: 2075968-X
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...