To analyze and evaluate textbooks, researchers have either proposed scales and checklists to be filled by teachers and learners or conducted qualitative investigations of the match between SLA theories and textbook activities. This study, however, employs the microstructural approach of schema theory to scrutinize the reading passages of “Mosaic 1 Reading”. To this end, 17 passages of the textb...

Culture of opossum kidney (OK) cells over 40 passages resulted in marked overexpression of alpha(1)-subunit and beta(1)-subunit Na(+)-K(+)-ATPase, which paralleled with increases in Na(+)-K(+)-ATPase activity, and enhanced availability in hydrogen peroxide (H(2)O(2)) (J Membr Biol 212: 163-175, 2006). The present study evaluated the mechanisms involved in increased H(2)O(2) production in OK cel...

objective(s) the main objective of this study was to investigate the status of chromosome stability in 3 human-mouse hybridoma cell lines over a period of time in various passages. materials and methods metaphase spreads from 3 human-mouse cell lines (hf2x653, spmo-4 and f3b6) that had been cultured in 4 successive passages, from 1 to 4 weeks, were prepared and analyzed. metaphase chromosomes s...

In this paper we propose a new perspective on the evolution and history of the idea of mathematical proof. Proofs will be studied at three levels: syntactical, semantical and pragmatical. Finally, in a highly speculative part, we will anticipate the evolution of proofs under the assumption that the quantum computer will materialise. We will argue that there is little ‘intrinsic’ difference betw...

The transportation of petroleum represents one of the most strategically important circulations of resources in the global economy. Its role cannot be overstated. Yet, petroleum has become a “strategically invisible” commodity as its flow has been continuous with limited, but eye-opening, disruptions such as the First Energy Crisis is 1973. Petroleum supplies are virtually taken for granted. Si...

This report describes the participation at the Web track of the TREC-(Italy). TREC-9 has been our rst participation to TREC and, then, to the Web track. In the following, we describe the experimental approach we have chosen, the research hypotheses and questions, the problems we encountered, the results we reached and our conclusions. We consider this experience as the rst step towards the part...