Showing papers by "Government of Canada published in 1991"
TL;DR: It is concluded that chronic physiologic cortisol treatment enhances plasma T3 clearance without change in hepatic T4 to T3 conversion, resulting in a decline in T3 concentration in both plasma and tissue (muscle) compartments.
66 citations
TL;DR: This report outlines the OEDIPUS experiment (defined as Observations of Electric-field Distributions in the Ionospheric Plasma—a Unique Strategy) and gives some of its preliminary scientific results.
Abstract: The launch of the tethered payload OEDIPUS-A on January 30, 1989 established a new record for the maximum length (958 m) of a space tether. The flight achieved a number of novel objectives in ionospheric plasma physics and tether technology. This report outlines the OEDIPUS experiment (defined as Observations of Electric-field Distributions in the Ionospheric Plasma—a Unique Strategy) and gives some of its preliminary scientific results.
In the 1970s, the word “tether” took on new meaning as space scientists began to plan pairs of spacecraft wired together to co-orbit. Much of the work on tethers in space centers on the idea of flying the National Aeronautics and Space Administration's (NASA) Space Shuttle with a tethered subsatellite. This will materialize in 1992 when NASA and the Italian Space Agency collaborate on the Shuttle experiment Tethered Satellite System [Bonifazi, 1987]. The first version of this experiment uses a conducting tether to draw current from the ionospheric plasma, thereby inducing a variety of electrodynamic phenomena. In addition to providing an experimental facility for plasma electrodynamics, the tethered system is a large flexible structure, and hence an interesting subject for space mechanics research in its own right.
21 citations
TL;DR: It is argued that for internal evaluations to be useful evaluators must take a management perspective and deliver technically adequate, timely, and politically astute evaluation products.
8 citations
01 Jan 1991
TL;DR: This chapter focuses on the use of small native cryptic plasmids to provide suitable replicons in Cellulolytic rumen bacteria, a major genetic resource for polysaccharide-degrading enzymes.
Abstract: Publisher Summary Cellulolytic rumen bacteria represent a major genetic resource for polysaccharide-degrading enzymes. Effective utilization of this resource, either for improving rumen function or for industrial lignocellulosic fermentations, requires an understanding of the molecular biology of these bacteria. The enzyme systems are primarily involved in polysaccharide degradation and include cellulases, hemicellulases, xylanases, and mixed-linkage glucanases. All three organisms possess complex cellulose-degrading systems, including multiple s-(l, 4)- d -glucanases. This complexity is a reflection of the structural complexity and conformational rigidity of the native lignocellulosic substrates. DNA transfer techniques and broad host range cloning vectors developed for taxonomically related bacteria are not very effective. The chapter focuses on the use of small native cryptic plasmids to provide suitable replicons.
5 citations
3 citations
TL;DR: In this paper, the authors used standard 1H and 13C NMR spectroscopy of assigning anomeric configuration for both acyclic and cyclic nucleosides of the types (1) and (2) respectively.
Abstract: We have been interested in developing routine methods, using standard 1H and 13C NMR spectroscopy of assigning anomeric configuration for both acyclic and cyclic nucleosides of the types (1) & (2) respectively. In the latter class of compounds ve have also sought to determine the site of glycosidation (viz N1 or N3 with respect to the imidazole ring). We have extended this study using FAB tandem mass spectrometry1 to identify stereochemical differences.
3 citations
TL;DR: In this article, the authors explore political theory by means other than is common in the discipline, such as reconstruction of the thought of our predecessors, clarification of the languages and concepts we alternately take for granted and debate as citizens and scholars; and evaluation of the performance and justification of public policies, political institutions and their leaders in light of
Abstract: The articles in this issue explore political theory by means other than is common in the discipline. More typical activities involve the reconstruction of the thought of our predecessors; clarification of the languages and concepts we alternately take for granted and debate as citizens and scholars; and the evaluation of the performance and justification of public policies, political institutions and their leaders in light of
2 citations