Trends and sex disparities in school bullying victimization among U.S. youth, 2011-2019.

Background: The prevalence of being bullied traditionally among U.S. high school students is expected to reduce to 17.

[Expression and characterization of a novel halohydrin dehalogenase from Tistrella mobilis KA081020-065].

Halohydrin dehalogenase is of great significance for biodegradation of the chlorinated pollutants, and also serves as an important biocatalyst in the synthesis of chiral pharmaceutical intermediates. A putative halohydrin dehalogenase (HheTM) gene from Tistrella mobilis KA081020-065 was cloned and over-expressed in Escherichia coli BL21 (DE3). The recombinant enzyme was purified by Ni-NTA column and characterized.