Association of individual-level concentrations and human respiratory tract deposited doses of fine particulate matter with alternation in blood pressure.

Fine particulate matter (PM) contributes to the risk of cardiovascular events, partially owing to its deposition in the human respiratory tract. To investigate short-term effects of ambient PM exposure on alternation of blood pressure (BP), this study was conducted during the winter-summer period between 2014 and 2015. The study included 106 community residents in Wuhan city, China.

[Identification of hexavalent chromium reducing bacteria Cr4-1 and optimization of its reduction conditions].

Objective: To identify the hexavalent chromium reduction Cr4-1, and to study the better conditions of the bacterial growth and its Cr(VI) reduction.

Methods: The physiological and biochemical methods and 16s rDNA sequencing were used for identification of bacteria Cr4-1. The influence of temperature, pH, initial Cr (VI) concentration and shaking speed on bacterial growth and Cr (VI) reduction were studied.