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Heavy metal pollution in urban soils and dust is mostly caused by extensive anthropogenic activity during urbanization and industrialization. In this research study, the pollution characteristics, sources, ecological and human health risks of heavy metals in urban soil, and dust have been thoroughly evaluated. The research findings demonstrate that dust has a higher level of contamination than urban soil, such as Pb, Cu, and Zn metals are more contaminated in both urban soil and dust throughout the city, and Hg and As are also found in locations with a high concentration of heavy industrial companies. This implies that traffic emissions are still a significant source of metals in urban areas, though industrial companies also contribute. The health risk assessment model used to calculate human exposure revealed that the non-carcinogenic and carcinogenic risks of selected metals in soil and dust were generally in the low range, except for the carcinogenic risk from Cr in children. Statistical analysis revealed that Cr and Ni concentrations were mainly of natural origin, Cu and Zn have been sourced from traffic, whereas Pb, Hg, and As have been sourced from industrial activities. The overall recommendation is that the road traffic environment and municipal construction facilities need to be improved to ensure the sustainable development of the city's environment, while pollution from industrial waste is strongly controlled. [Display omitted] • Heavy metal pollution in urban soil and dust was evaluated as a result of industrialization and urbanization. • In recent years, heavy metal pollution from industrial activities in Lanzhou has decreased. • Traffic activity is a major contributor to heavy metal pollution in Lanzhou's soil and dust. • Suggestions on strengthening municipal construction and management were put forward. [ABSTRACT FROM AUTHOR]

Objective: To investigate whether the vaginal flora of women from 2 different ethnic groups living in the same region of China harbored the same species of Candida in the same proportions.Methods: The ethnicity of the women was determined by conventional cultural identification, and the Candida spp. harbored by the women were determined by conventional methods and DNA genotyping.Results: Candida albicans accounted for 77.1% and 89.6%, respectively, of the Candida spp. isolated from the normal vaginal flora of Han Chinese and Tibetan women. This difference was statistically significant and may explain the differences in the rates of opportunistic infections in these 2 groups. Among the non-albicans Candida spp. isolated were C. glabrata and C. tropicalis.Conclusion: Different species of Candida were differently distributed in the normal vaginal flora of ethnic Han Chinese and Tibetan women living in the same geographic region. [ABSTRACT FROM AUTHOR]