Transmission of tuberculosis in an incarcerated population during the subclinical period: A cross-sectional study in Qingdao, China

ObjectivesAs a closed gathering place, prison is the cradle of tuberculosis (TB) outbreak.Therefore, the analysis of the prevalence rate and risk factors of latent tuberculosis infection (LTBI) in prison will be a necessary measure to intervene in the spread of tuberculosis.MethodsIn this study, we consecutively recruited 506 adult prisoners in Qin

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Effects of screw end face structural parameters on polylactic acid flow field in meshing counter rotating twin screw extruder

Objective: To investigate the effect of the screw configuration on the polylactic acid flow field on the structural parameters of the screw on the end face of LOVE BUTTER the screw in the meshing counter rotating twin screw extruder.Methods: The theoretical model of the heterodirectional double-ended threaded element was established by Solidworks s

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