Nanomaterials are widely used as pseudostationary and stationary phases in electrically driven separations. The advantages of using nanomaterials are numerous including tunable sizes, multiple core compositions, flexible injection schemes, and diverse surface chemistries. Nanomaterials, however, exhibit large surface energies which induce aggregation and may yield unpredictable function in sepa...

Efficient and specific interactions between proteins bound to the same DNA molecule can be dependent on the length of the DNA tether that connects them. Measurement of the strength of this DNA tethering effect has been largely confined to short separations between sites, and it is not clear how it contributes to long-range DNA looping interactions, such as occur over separations of tens to hund...

The precision of discriminating the separation of two dots was measured as a function of separation for eccentricities of 0-10 deg under photopic and scotopic conditions. At each eccentricity, the 2-dot separation discrimination thresholds showed a V-shaped dependence on separation. For separations less than approximately twice the resolution threshold, performance deteriorated from photopic to...

Excellent electrophoretic separations of a variety of biological molecules can be accomplished by using uncharged, triblock copolymers as the "gel" media. These copolymers form uncrosslinked, lyotropic liquid crystalline phases of large micelles between which molecules must travel. Unlike crosslinked hydrogels in common use, these alternative media have highly ordered internal structures. Pluro...

Khanina, Natalya. M.S., Purdue University, December 2014. Reverse-Phased Liquid Chromatography of Small Molecules using Silica Colloidal Crystals. Major Professor: Mary J. Wirth. Capillaries packed with a silica colloidal crystal (SCC) of 470 nm nonporous particles have recently been shown to offer significant improvements in the peak width, resolution, and speed of protein analysis due to the ...

We use the Véron-Cetty & Véron (2000) catalog (VV) of 13 213 quasars to investigate their possible physical grouping over angular scales 10′′ ≤ ∆θ ≤ 1000′′. We first estimate the number of quasar pairs that would be expected in VV assuming a random distribution for the quasar positions and taking into account observational selection effects affecting heterogeneous catalogs. We find in VV a stat...

The Bureau of Labor Statistic’s Job Opening and Labor Turnover survey (JOLTS) attempts to measure US labor market dynamics on a monthly basis. The JOLTS survey estimates both the flow of employment into business establishments (hires) and the flow of employment out of business establishments (separations). In theory, it is assumed that the levels of these two types of flow should relate directl...

INTRODUCTION Our aim was to examine infants' behavioral and physiological stress responses to three weekly maternal separations, in relation to maternal prenatal psychosocial stress and cortisol. The hypothesis was that more prenatal stress and higher cortisol concentrations would predict smaller decreases in negative behavior and cortisol responses over the separations (i.e. less habituation)....

We consider basic notions of security for cryptographic hash functions: collision resistance,preimage resistance, and second-preimage resistance. We give seven different definitions thatcorrespond to these three underlying ideas, and then we work out all of the implications andseparations among these seven definitions within the concrete-security, provable-security frame-wor...