[Exposure Level of Population and Economy in Zhejiang Province Considering the Background of PM in East China].

Using the satellite-derived Fine Particulate Matter (PM) data of global high-precision products during 1998-2012, detailed characteristics of PM distribution over East China and its change are given, and the PM exposure levels for population and economy in Zhejiang is further analyzed in this context. The results show that the overall variability of the regional average value of PM concentration exhibits an increasing trend followed by a decrease during 1998-2012, which is consistent in both the East China and Zhejiang provinces; the turning point occurs around 2007-2009. In the initial years (1998-2000), annual average PM concentrations are below 50 μg·m in the southern part of East China and eastern part of Shandong, while it is 50-75 μg·m in other areas.

Chemical modification studies on alkaline phosphatase from pearl oyster (Pinctada fucata): a substrate reaction course analysis and involvement of essential arginine and lysine residues at the active site.

Alkaline phosphatases (ALP, EC 3.1.3.