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The Housing and Rental Price Effects of Unskilled and Skilled Immigration in the United States: 2013-2017
No full textThis paper examines the impact of unskilled (not college-educated) and skilled (college-educated) immigration on housing prices and rental prices. An instrumental variable approach is employed to investigate causal effects. Results show that an increase in unskilled immigration inflows may lead to a greater rental price appreciation, but an increase in skilled immigration inflows may lead to a lower rental price appreciation. Contrary to previous studies, this study finds that immigration inflows have little housing price effects
Effects of Exogenous N-Acyl-Homoserine Lactones on Biofilm Formation and Motility in Acinetobacter nosocomialis
No full textOne of the major factors contributing to drug resistance in Acinetobacter nosocomialis infections is biofilm development, which is facilitate by quorum-sensing (QS) systems. Quorum sensing by the LuxI and LuxR homologues, AnoI and AnoR, in A. nosocomialis plays a role in biofilm formation and motility of this pathogenic bacterium. The aim of this study was to evaluate the effects of exogenous N-acyl-homoserine lactones (AHLs) on the regulation of biofilm and motility of A. nosocomialis and anoI-deletion mutant. We found that anoR mRNA expression levels in the anoI-deletion mutant were increased in the presence of different types of AHLs compared with that in the absence of exogenous AHL. Among AHLs, C12-HSL appeared to exert the greatest stimulatory effect on biofilm formation and motility. Notably, the anoI-deletion mutant also exhibited significant decreases in expression of the biofilm-and motility-related genes, csuC, csuD and pilT, decreases that were attenuated by addition of exogenous AHLs. Combining the AHL C12-HSL with C6-HSL or C10-HSL exerted synergistic effects that restored the motility phenotype in the anoI-deletion mutant. Taken together, our data demonstrate that C12-HSL may act as an important signaling molecule in A. nosocomialis through regulation of biofilm formation and cell motility, potentially providing a new target for the control of A. nosocomialis infections
Aesculus pavia
No full textHeber Springs, AR, UShttps://orc.library.atu.edu/aesculus/1019/thumbnail.jp
Allium canadense
No full textWittich Township, AR, USAhttps://orc.library.atu.edu/allium/1006/thumbnail.jp
Antennaria plantaginifolia
No full textBearden Township, AR, USAhttps://orc.library.atu.edu/antennaria/1002/thumbnail.jp