First report of the complete mitogenome of Sasa, 1987 (Diptera, Chironomidae) from Hebei Province, China.

Sasa, 1987 is an important bioindicator for freshwater ecosystem monitoring. Although COI barcode analyes have been performed on . , the mitogenome of this taxon has not been assembled and analyzed.

[Seasonal Distribution, Composition, and Source Apportionment of Polycyclic Aromatic Hydrocarbons and Organochlorine Pesticides in the Main Stream of the Luanhe River].

Occurrence of 17 polycyclic aromatic hydrocarbons (PAHs) and 15 persistent organochlorine pesticides (OCPs) were analyzed by gas chromatography coupled to tandem mass spectrometry (GC/MS/MS) during the spring and summer of 2015 in surface water at 14 sampling sites in the mainstream of the Luanhe River to elucidate their seasonal distribution, composition, and potential sources. Results showed that total PAH concentrations in the surface water of the Luanhe River ranged from 33.33 ng·L to 90.

[Seasonal Pollution Characteristics and Source Identification of Polycyclic Aromatic Hydrocarbons and Organochlorine Pesticides in Surface Water of Baiyangdian Lake].

Seasonal variations of 17 polycyclic aromatic hydrocarbons(PAHs) and 15 persistent organochlorine pesticides(OCPs) were analyzed during spring and summer in surface water from 12 sampling sites of Baiyangdian lake to elucidate their seasonal pollution characteristics and sources. The results showed that total concentrations of PAHs in surface water of Baiyangdian lake ranged from 35.38 to 88.