English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

The distribution characteristics and resources (in plentiful and dry seasons) of polycyclic aromatic hydrocarbons (PAHs) in the Liuxi River were analyzed and toxicity of typical PAHs to biological cells were assessed. The results showed that: Compared with the dry season, the species and content of PHAs in Liuxi River are fewer in the plentiful season. In the plentiful season, 7 kinds of PHAs were detected, and the total PAHs content (∑PAHs) in each sampling point ranges from 73.2 to 258.5 ng/g. While in the dry season, 13 kinds of PHAs were detected, and the ∑PAHs ranges from 26.3 to 1701.5 ng/g. To trace the sources of PAHs, the molecular ratio methods, such as LMW/HMW, Fla/(Fla + Pyr) and BaA/(BaA + Chr), were used respectively. In most cases, PAHs in Liuxi Ricer were pyrogenic. These sources included combustion of petroleum fuel, and burning of biomass fuels like coal and wood. The toxicity of fluorene and fluoranthene in Liuxi River was evaluated. The results showed that there was oxidative damage induced by H 2 O 2  at a fluorine concentration of 50 mg/L, and fluoranthene could induce oxidative stress and DNA damage. In addition, the damage stress induced by fluoranthene was stronger than by fluorine under the same concentrations.

Distribution, sources and toxicity of polycyclic aromatic hydrocarbons in Liuxi River, China