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Using the CiteSpace visual literature analysis tool, 802 relevant literature on dragon boat racing research were analyzed to map the knowledge structure of research hotspots, core author groups and research institutions from 1980-2022 in CNKI General Library. The results show that dragon boat racing research has experienced a stagnant period, a recovery period and a rapid development period, and it was expected that after 2023, dragon boat racing research would usher in new development opportunities. Dai Yu, Wang Saishi and Wang Junqi were the main authors of publications, but there was not much cooperation among research authors, mainly relying on academic relationships and not much cross-regional cooperation; Guangxi University for Nationalities, Shanxi Normal University and Minzu University of China were the institutions with more publications, and universities were the foundation of dragon boat culture research. Keyword co-occurrence analysis formed a total of 765 nodes with 1372 connections, (density = 0.0047), S=0.9124, which was close to 1, indicating that the homogeneity of the network was high and the research perspectives in the field of dragon boat racing tend to be diversified. Analyzed by the time of appearing keywords, dragon boat racing research shows a trend of migrating from cultural research to competitive sports. [ABSTRACT FROM AUTHOR]

A Z-scheme BNO/BSO composite photocatalyst has been successfully prepared using an in situ solvothermal method. The phase component, microstructure and optical properties of the as-prepared samples were characterized using X-ray diffractometry, scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy, photoluminescence spectroscopy and other means. The photocatalytic performance of the BNO/BSO composite was evaluated via the degradation of the typical antibiotic tetracycline (TC) under hydrogen peroxide assistance and visible light irradiation. The "cata + H2O2 + vis" system shows the best photocatalytic activity, and its apparent rate constant reaches 0.03164 min−1, which is 4.9 times and 5.7 times that of the "cata + vis" system and the "cata + H2O2" system, respectively. Compared with pristine that of BSO alone, the reaction rate constant of the 15% BNO/BSO composite increases 1.8 times. The enhanced photocatalytic activity is attributed to the construction of a unique Z-scheme-type heterojunction, which effectively suppresses the recombination of electron–hole pairs. In addition, the addition of H2O2 promotes the generation of more active species. Moreover, a possible photocatalytic degradation mechanism is also further proposed. [ABSTRACT FROM AUTHOR]

Based on the monitoring results ol environmental quality in the sea area near the Aojiang estuary in Wenzou during 2010-2012, the present situation of environmental quality in the sea area was analyzed and evaluated. The results show that pH, DO. CODMn, petroleum, and heavy metals (Cu, Pb, Zn, Cd, Hg, As and Cr) in the sea area near the Aojiang estuary did not exceed the second-class standard of Seawater Quality Standard (GB 3097-1997), but both inorganic nitrogen and reactive phosphate in the sea area exceeded the second-class standard seriously, and the water quality of the sea area was in an eutrophic state; domestic sewage and fertilizer loss were the main sources ol nitrogen and phosphorus. The standard index of most evaluation factors of sediment quality except for Zn was smaller than 1, meeting the demands of sediment quality for environmental protection. [ABSTRACT FROM AUTHOR]

internal standard method based on gas chromatography-electron capture detector (GC-ECD), the contents of persistent organochlorine pollutants polychorinated biphenyls (PCBs) and organochlorine pesticides (OCPs) in eggs of seabirds (Catharacta lonnbergi, Catharacta maccormicki, Pygoscelis papua and Macronectes giganteus) breeding on King George Island, Antarctica were detected, and their ecological environment significance was discussed. The results showed that the recovery of various compounds ranged from 68.6% to 90.8% ; relative standard deviation (RSD) was 3.6%, and the lowest detection limits of PCBs and OCPs were 0.8 -16 and 2 - 1 2 pg respectively, which could meet the demands for the residue analysis of trace persistent organochlorine pollutants in the eggs of Antarctic seabirds. The contents of PCBs, DDTs, HCB and HCHs in the eggs of Antarctic seabirds were 0.5 -515.5, 2.0 -304.4, 0.5 -70.5, and 0 . 5 - 2 . 0 ng/g respectively. In addition, the accumulation of PCBs and OCPs in the skuas was enhanced gradually through the food chain. The maximums of persistent organochlorine pollutants appeared in the eggs of C. lonnbergi, followed by the eggs of C. maccomicki. The detection of OCPs and PCBs in the eggs of Antarctic seabirds was not interfered by other compounds containing chlorine, showing that the eXraction, purification and detection method was suitable for the analysis of OCPs and PCBs in the eggs of Antarctic seabirds and has high sensitivity and reliability. [ABSTRACT FROM AUTHOR]

A Z-scheme BNO/BSO composite photocatalyst has been successfully prepared using an in situ solvothermal method. The phase component, microstructure and optical properties of the as-prepared samples were characterized using X-ray diffractometry, scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy, photoluminescence spectroscopy and other means. The photocatalytic performance of the BNO/BSO composite was evaluated via the degradation of the typical antibiotic tetracycline (TC) under hydrogen peroxide assistance and visible light irradiation. The "cata + H 2 O 2 + vis" system shows the best photocatalytic activity, and its apparent rate constant reaches 0.03164 min -1 , which is 4.9 times and 5.7 times that of the "cata + vis" system and the "cata + H 2 O 2 " system, respectively. Compared with pristine that of BSO alone, the reaction rate constant of the 15% BNO/BSO composite increases 1.8 times. The enhanced photocatalytic activity is attributed to the construction of a unique Z-scheme-type heterojunction, which effectively suppresses the recombination of electron-hole pairs. In addition, the addition of H 2 O 2 promotes the generation of more active species. Moreover, a possible photocatalytic degradation mechanism is also further proposed.