Rapid small scale preparation of bacterial genomic DNA, suitable for cloning and hybridization analysis

The uptake of noxythiolin by a urinary isolate of Escherichia coli was examined initially at 37°C but the adsorption isotherm was complicated by the concomitant degradation of the compound. When drug adsorption was investigated at 4°C, to reduce the degradation rate of the compound, it was observed that noxythiolin was taken up by the urinary isolate in a linear fashion. The resulting adsorption patterns are discussed in relation to their possible classification. The implications of this uptake are considered with respect to the antimicrobial activity of noxythiolin.     

Teachers' Expectations and Sense of Responsibility for Student Learning: The Importance of Race, Class, and Organizational Habitus

This article examines how the concentration of low-income African American students in urban elementary schools is deeply coupled with a leveling of teachers' expectations of students and a reduction in their sense of responsibility for student learning. We argue that this process is rooted in school-based organizational habitus through which expectations of students become embedded in schools. We show that this process can be mediated if school leaders engage in practices designed to increase teachers' sense of responsibility for student learning. [organizational habitus, race, class, teacher expectations]