As a carcinogenic pollutant, hexavalent chromium (Cr(VI)) in the ambient air has serious influences on public health. Due to its instability and difficulty chemical analysis, few studies have been conducted regional concentration level of environmental Cr(VI), especially China. The pollution levels Cr(VI) PM2.5 were determined two sampling sites Beijing Qingdao from September December 2020. con...

Emissions from motor vehicles have gained the attention of government agencies. To alleviate air pollution and reduce petroleum demand in China, policy “oil to gas” was vigorously carried out. Qingdao began promote use natural gas (NGVs) 2003. By end 2016, there were 9460 (NG) taxis Qingdao, which accounted for 80% total taxis. An understanding implementation emission reductions is required. Ex...

General Comments: The manuscript titled ‘The concentration, source apportionment and deposition flux of atmospheric particulate inorganic nitrogen during dust events’ written by Jianhua Qi presented the dust impacts on particulate inorganic nitrogen by analyzing the aerosol samples collected at Qingdao, China. The authors divided dust pattern into three parts, and investigated the dry depositio...

Typhoon induced sediment warming has been proven important to coastal sound-field change in this study. It was observed that the temperature of the bottom waters off the coast of Qingdao increased by 5 °C after the passage of typhoon Damrey in 2012. Sediment warming due to bottom-water temperature increase was calculated and the change in sediment sound speed was estimated. Transmission loss (T...

This study describes an investigation into secondary metabolites that are produced by a marine red alga, Symphyocladia latiuscula, which was collected from coastal waters off Qingdao, China. A combination of normal, reversed phase, and gel chromatography was used to isolate six citric acid derived natural products, aconitates A-F (1-6), together with two known and ten new polybrominated phenols...

Cheng Wang 1,*, Liang Chen 1, Haisheng Zhao 2, Zheng Lu 3, Mingming Bian 3, Running Zhang 3 and Jian Feng 2 1 Qian Xuesen Laboratory of Space Technology, China Academy of Space Technology, Beijing 100094, China; [email protected] 2 National Key Laboratory of Electromagnetic Environment, China Research Institute of Radiowave Propagation, Qingdao 266107, China; [email protected] (H.Z.); f...