Concentrations and Exposure Evaluation of Metals in Diverse Food Items from Chengdu, China.

A total of 520 food samples belonging to 29 food types and 63 drinking water were collected in Chengdu market of China in 2014 to investigate the concentrations of 11 metals, and to assess the related exposure to the local consumers by estimating the hazard quotient and carcinogenic risk (CR). The results showed that metals concentrations in drinking water were below the limit values suggested by the Ministry of Health of the People's Republic of China, and FAO/WHO (Food and Agriculture Organization of the United Nations/World Health Organization). While As, Cd, and Cr were found at concentrations higher than the limit values in some of the foodstuffs.

Grain Size Distribution and Health Risk Assessment of Metals in Outdoor Dust in Chengdu, Southwestern China.

A total of 27 outdoor dust samples from roads, parks, and high spots were collected and analyzed to investigate the contamination of 11 metals (Cr, Mn, Co, Ni, Cu, Zn, As, Sr, Cd, Sb, and Pb) in Chengdu, China. The results showed that the samples from the high spots exhibited the highest heavy metal level compared with those from the roads and the parks, except for Ni, Cu, and Pb. The dust was classified into five grain size fractions.

Concentrations and health risk assessment of metal(loid)s in indoor dust from two typical cities of China.

Eleven trace metal(loid)s were determined in the household dust samples from Chengdu and Tianjin, China, and related human exposure and health risk to metal(loid)s via indoor dust intake were evaluated. The trace metal(loid)s were found to be highly concentrated and polluted in the indoor environment of Chengdu and Tianjin, especially for Cu, Zn, Cd, Sb, and Pb, of which the enrichment factors exceeding 5. Metal(loid) levels in the indoor dust samples exhibited no statistical differences between the two cities, with the exception of Sb, which was detected higher in the Chengdu samples.

Particle size distribution and perchlorate levels in settled dust from urban roads, parks, and roofs in Chengdu, China.

A total of 27 settled dust samples were collected from urban roads, parks, and roofs in Chengdu, China to investigate particle size distribution and perchlorate levels in different size fractions. Briefly, fine particle size fractions (<250 μm) were the dominant composition in the settled dust samples, with mean percentages of 80.2%, 69.

Occurrence and exposure evaluation of perchlorate in indoor dust and diverse food from Chengdu, China.

A total of 688 samples, including 520 food samples belonging to 29 food types in 10 groups, 63 drinking water, and 105 indoor dust samples were collected during May to November in 2014 in Chengdu and Tianjin (only dust samples in Tianjin), China to investigate the perchlorate levels in these samples and to estimate the related exposure to Chinese people. Significant difference in indoor dust perchlorate levels was found between Chengdu and Tianjin, with the concentrations ranging from 0.11 to 38.

Updated meta-analysis of NFkappaB1 -94ins/Delattg promoter polymorphism and cancer risk based on 19 case-control studies.

Objective: Recently, a common insertion/deletion (-94insertion/deletion ATTG, rs28362491) polymorphism in the NFkappaB1 promoter region has been extensively investigated for association with cancer risk but the results have been inconsistent. In order to clarify the effect of the promoter polymorphism we performed an update meta-analysis of published case-control studies to better compare the results between studies.

Methods: Relevant studies were identified via a thorough literature search on Medline and Embase database (up to August 10, 2011).