Abstract.Comprehensive field measurements are needed to understand the mercury emissions from Chinese power plants and to improve the accuracy of emission inventories. Characterization of mercury emissions and their behavior were measured in six typical coal-fired power plants in China. During the tests, the flue gas was sampled simultaneously at inlet and outlet of Selective Catalytic Reduction (SCR), electrostatic precipitators (ESP), and flue gas desulfurization (FGD) using the Ontario Hydro Method (OHM). The pulverized coal, bottom ash, fly ash and gypsum were also sampled in the field. Mercury concentrations in coal burned in the measured power plants ranged from 17 to 385 µg/kg. The mercury mass balances for the six power plants varied from 87 to 116% of the input coal mercury for the whole system. The total mercury concentrations in the flue gas from boilers were at the range of 1.92-27.15 µg/m 3 , which were significantly related to the mercury contents in burned coal. The mercury speciation in flue gas right after the boiler is influenced by the contents of halogen, mercury, and ash in the burned coal. The average mercury removal efficiencies of ESP, ESP plus wet FGD, and ESP plus dry FGD-FF systems were 24%, 73% and 66%, respectively, which were similar to the average removal efficiencies of pollution control device systems in other countries such as US, Japan and South Korea. The SCR system oxidized 16% elemental mercury and reduced about 32% of total mercury. Elemental mercury, accounting for 66-94% of total mercury, was the dominant species emitted to the atmosphere. The mercury emission factor was also calculated for each power plant.

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Patients with aggressive periodontitis have significantly elevated levels of plasma C-reactive protein and interleukin-6. These elevated inflammatory factors might potentially increase the risk for cardiovascular events and glucose dysregulation in relatively young individuals.

Background and Objective:  Vitamin D‐binding protein (DBP) is a multifunctional and highly expressed plasma protein. Among its diverse roles, including those in the immune and inflammatory responses, it is the primary carrier of vitamin D, which has been implicated in periodontitis. We hypothesized that there is a correlation between systemic DBP levels and generalized aggressive periodontitis (GAgP). Material and Methods:  Forty‐four patients with GAgP and 32 healthy controls were recruited. Clinical parameters were examined, including the mean bleeding index, probing depth, attachment loss and percentage of severely affected sites. Blood chemistry analyses were performed for each subject. Plasma levels of DBP, interleukin‐6 (IL‐6) and procalcitonin (PCT) were measured using ELISAs, and plasma levels of 25‐hydroxy‐vitamin D3 (25(OH)D3) were detected using a radioimmunoassay. Results:  Significantly higher levels of plasma DBP, IL‐6, PCT and 25(OH)D3, as well as leukocyte counts, neutrophil counts and neutrophil percentages were found in patients with GAgP compared with healthy controls (p < 0.05 for all). Multiple linear regression analysis showed that the plasma DBP levels were significantly correlated with GAgP, plasma PCT levels and smoking status (p < 0.05 for all). In the GAgP group, the plasma DBP levels in smokers were significantly higher than those in nonsmokers (p < 0.001). Conclusion:  Elevated plasma vitamin DBP levels are associated with GAgP.

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The Chinese central government introduced the ‘Chinese Green Building Label’ in 2008, which makes China one of the few developing countries with an official rating system of buildings’ performance in sustainability. This paper investigates the existence and magnitude of the price premium associated with this official green label in the residential sector. Based on a unique data set of green-labelled, newly built housing projects and their non-labelled counterparts from around the country in 2013, an empirical analysis suggests that the labelled housing projects attract a price premium of 6.9% compared with their non-labelled counterparts. Further analysis suggests that this official green label is more effective as a reliable signal of buildings’ energy efficiency in the Chinese context compared with developers’ self-advertised ‘greenness’. These results provide preliminary evidence that with this official rating system, the investment in buildings’ energy-efficiency could be potentially profitable for housing developers in China, and such profitability may herald a rapid development of the green housing market in urban China.

The physical origin of severe low-frequency pressure fluctuation frequently observed in Francis hydraulic turbines under off-design conditions, which greatly damages the structural stability of turbines and even power stations, is analyzed based on the hydrodynamic stability theory and our Reynolds-averaged Navier-Stokes equation simulation (RANS) of the flow in the entire passage of a Francis turbine. We find that spontaneous unsteady vortex ropes, which induce severe pressure fluctuations, are formed due to the absolute instability of the swirling flow at the conical inlet of the turbine's draft tube.