نتایج جستجو برای: engelmann syndrome
تعداد نتایج: 622227 فیلتر نتایج به سال:
Within the Central Rocky Mountains, spruce beetle populations have the potential to rapidly transition from endemic to epidemic levels in the spruce-fir (Engelmann spruce and subalpine fir) forest type. Conventional management has focused on creating resistance to spruce beetle outbreaks by manipulating the overstory density and composition. Three silvicultural treatments, single tree selection...
Rooted in behavioral theory, particularly the radical or selectivist behaviorism of B.F. Skinner (1953, 1954, 1966, 1968, 1974), the direct instruction (DI) approach to teaching is now well into its third decade of influencing curriculum, instruction, and research. It is also in its third decade of controversy. Our purpose is to present the DI model with the notion that the designer can and sho...
In 1899, Karel F. Wenckebach unraveled the complicated arrhythmia that bears his name--one of the most famous eponyms in medicine. He reported his findings before the benefit of clinical electrocardiography or the discovery of the sinoatrial and atrioventricular nodes. Born and educated in The Netherlands, Wenckebach first worked in Utrecht in the physiology laboratory of T.W. Engelmann, his re...
The response of xylem pressure potential of Engelmann spruce (Picea engelmannii Engelm.) to environmental factors was studied in the natural subalpine environment. Data were analyzed in the context of a leaf water potential model based upon the van den Honert model for water transport through the soil-plant-atmosphere continuum. At soil temperatures of 10 to 15 C, xylem pressure potential decre...
Although the teacher-proof movement of the post-Sputnik 1960s has long been considered a failure, new versions of teacher proofing have gained adherents in the 1990s, as increasing numbers of schools continue to implement scripted curricula that turn teachers into script readers. These curricula often provide word-for-word scripts that teachers are strongly encouraged to follow, and include Sla...
Seedlings of ponderosa pine, Douglas-fir, white fir, Engelmann spruce, and subalpine fir were exposed continuously to charcoal-filtered (CF) air or one of three levels of a simulated ambient exposure typical of SO, pollution near smelters in the western United States. Seedlings were exposed during winter-spring experiments for 60 days to hourly means of 17, 38, and 54 ppb in 1988 and 35, 57, an...
Engelmann spruce forests are structurally and compositionally diverse, occur across a wide range of physiographic conditions, and are the result of varying disturbance histories such as fire, wind and spruce beetle. The spruce beetle is a natural disturbance agent of spruce forests and has population levels that fluctuate from endemic to epidemic. Conceptually, structural and compositional dive...
Dans cet ouvrage issu de sa these doctorat, Lukas Engelmann s’interroge sur la production et l’evolution des images visant a caracteriser le sida dans domaine medical. A croisee l’histoire medecine visuelle, l’auteur fonde son etude une source particuliere, originale : les atlas du sida, edites entre 1986 et 2008 monde anglophone. Le corpus se compose ainsi trois series d’atlas reedites success...
The cytokines controlling the development of human interleukin (IL) 17--producing T helper cells in vitro have been difficult to identify. We addressed the question of the development of human IL-17--producing T helper cells in vivo by quantifying the production and secretion of IL-17 by fresh T cells ex vivo, and by T cell blasts expanded in vitro from patients with particular genetic traits a...
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