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Associations of traffic-related air pollution with children’s attention spans: a factor analysis

100%

Wang S., Zhang J., Yao J., Du M.

Polish Journal of Environmental Studies

2016

tom 25

nr 4

To evaluate the associations between traffic-related air pollution (TRAP) and children’s attention spans, an analysis was performed in a cross-sectional epidemiological study. Two primary schools were chosen based on the levels of traffic density and ambient air pollutants. School A is located in a clean area and School B in a polluted area. Two-hundred and eighty-two students from three third-grade classes (9-10 years of age) (School A, 136; School B, 146) participated in five computerized-based neurobehavioral tests. Neurobehavioral test results were used as the independent variables for component extraction by factor analysis, and two main compositions – visual memory factor and attention factor – were extracted. After controlling the potential confounding factors, we found that children from School B at the polluted area had lower scores of attention factor than those from School A in the clean area (β = -0.300, p = 0.016), and girls obtained higher scores than boys (β = 0.317, p = 0.011). In conclusion, exposure to TRAP was significantly associated with decreased attention score of school-aged urban children, and the association was significantly more evident in boys than girls.

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Colour stability and lipid oxidation of beef longissimus lumborum under different packaging conditions

76%

Bonny D. S. S., Li X., Li Z., Li M., Du M., Gao L., Zhang D.

Polish Journal of Food and Nutrition Sciences

2017

tom 67

nr 4

The objective of this study was to investigate the colour stability and lipid oxidation of beef under different packaging methods. The muscles longissimus lumborum were randomly packed in vacuum or modifi ed atmosphere packaging (MAP, 80% O2 , 20% CO2 ). Both packages were aged at 4°C for 7, 14 and 21 days. After each ageing time, samples were displayed in a refrigerator for 2, 4 and 6 days. Colour stability, lipid oxidation and their correlation were determined. Beef under vacuum packaging showed higher a* values on 7, 14, and 21 days of ageing and lower L* values on 14 and 21 days of ageing than beef in MAP (p<0.05). Lower a* values were observed in the samples packed in MAP, then displayed compared to samples packed in vacuum, then displayed after 21 days of ageing time on day 2, 4 and 6 of the display period (p<0.05). Thiobarbituric acid reactive substances (TBARS) increased signifi cantly in MAP compared to vacuum during 7, 14, and 21 days of ageing (p<0.05). An increase of TBARS was also observed during display after 14 and 21 days of ageing in samples packed in MAP, then displayed. Furthermore, a significant difference (p<0.05) was observed between samples packed in MAP and vacuum in peroxide value on 14 days of ageing. Lipid oxidation was observed mainly in the samples packed in MAP compared to vacuum, and positively correlated with results on colour stability.

Variations in carbon, nitrogen and phosphorus stoichiometry during a growth season within a Platycladus orientalis plantation

64%

Du M., Feng H., Zhang L., Pei S., Wu D., Gao X., Kong Q., Xu Y., Xin X., Tang X.

Polish Journal of Environmental Studies

2020

tom 29

nr 5

Ograniczanie wyników

2 Polish Journal of Environmental Studies

1 Polish Journal of Food and Nutrition Sciences

3 Du M.

1 Bonny D. S. S.

1 Feng H.

1 Gao L.

1 Gao X.

1 Kong Q.

1 Li M.

1 Li X.

1 Li Z.

1 Pei S.

1 Tang X.

1 Wang S.

1 Wu D.

1 Xin X.

1 Xu Y.

1 Yao J.

1 Zhang D.

1 Zhang J.

1 Zhang L.

1 2020

1 2017

1 2016

Wyniki wyszukiwania

Associations of traffic-related air pollution with children’s attention spans: a factor analysis

Colour stability and lipid oxidation of beef longissimus lumborum under different packaging conditions

Variations in carbon, nitrogen and phosphorus stoichiometry during a growth season within a Platycladus orientalis plantation