Local Fragmentation as Immigration Regulation
Immigration scholars have traditionally focused on the role of national borders and the significance of nation-state citizenship. At the same time, local government scholars have called attention to the significance of local boundaries, the consequence of municipal residency, and the influence of the two on the fragmentation of American society. This paper explores the interplay between these two mechanisms of spatial and community controls. Emphasizing their doctrinal and historic commonalities, this article suggests that the legal structure responsible for local fragmentation can be understood as second-order immigration regulation. It is a mechanism that allows for finer regulatory control than the crude boundary and membership regulations at the national level. It also serves as a means by which, in the absence of a national consensus, the competing interests surrounding immigration can still be negotiated and reconciled on the ground. Not only does this framework provide a conceptual bridge that unifies boundary and membership controls that, until now, have been perceived as disparate and unconnected areas of law, but it also raises important questions about policies at the heart of today’s immigration debates.
The Metropolitan Dimensions of United States Immigration Policy: A Theoretical and Comparative Analysis
This Dissertation is brought to you for free and open access. It has been accepted for inclusion in Dissertations and Theses by an authorized administrator of PDXScholar. For more information, please contact pdxscholar@pdx.edu. Recommended Citation Toussaint, Nicole G., "The Metropolitan Dimensions of United States Immigration Policy: A Theoretical and Comparative Analysis" (2013). Dissertations and Theses. Paper 1065.
Development of an Analytical Method for Explosive Residues in Soil
Abstract : An analytical method was developed to determine the concentrations of HMX, RDX, TNB, DNB, Tetryl, TNT and 2,4-DNT in soil. The method involves extracting a 2-g sample with 50 mL of acetonitrile using an ultrasonic bath procedure for 18 hr. A 10-mL portion of the extract is diluted with 10 mL of water, filtered through a 0.45-micrometer Millex SR filter, and analyzed by RP-HPLC using a fixed 254-nm UV detector. Separations were obtained on an LC-18 column eluted with 50:50 water-methanol. Retention times were 2.55, 3.82, 5.16, 6.25, 7.04, 8.47 and 10.15 min for HMX, RDX, TNB, DNB, Tetryl, TNT and 2,4-DNT, respectively. Confirmation of analyte identities is recommended by RP-HPLC on an LC-CN column using 50:50 water-methanol. Kinetic studies using naturally contaminated soil indicated that equilibrium was achieved within 24 hr for the majority of soils and analytes studied. The method provides linear calibration curves over a wide range of concentrations. Reporting limits were conservatively estimated at 1.6, 1.8, 1.5, 0.5, 5.5, 0.8 and 0.8 micro grams/g for HMX, RDX, TNB, DNB, Tetryl, TNT and 2,4-DNT. Analytical precision was estimated at + or - 0.44, 0.51, 0.43, 0.13, 1.24, 0.27 and 0.20 micro grams/g, respectively, in the range of homogeneous variance near the detection limits. At higher concentrations the relative standard deviation was constant at 2% for HMX, RDX, DNB and TNB, 3% for TNT and 2,4-DNT, and 6% for Tetryl.