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Ohne Zusammenfassung 相似文献
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In a study with 36 female albino Sprague-Dawley rats, parasagittal knife cuts along the lateral border of the hypothalamus which transected most of the fibers that enter or leave the hypothalamus laterally reproduced the full spectrum of effects on food intake seen after lateral hypothalamic lesions. Ss were aphagic and adipsic for weeks or months and remained unresponsive to physiological signals that normally regulate feeding and drinking, even after voluntary ingestive behavior returned. Ss did not respond to insulin or 2-deoxy-D-glucose treatments (which decrease blood sugar or glucose utilization) and showed only a small increase in intake when exposed to low environmental temperatures. Food consumption appeared to be governed primarily by the palatability of the diet. Ss also did not respond to NaCl or polyethylene glycol treatments (which result in cellular dehydration or extracellular hypovolemia) and returned to a state of adipsia when food was removed. (30 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved) 相似文献
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Ohne Zusammenfassung
Mitteilung aus dem Forschungsinstitut für Holzwerkstoffe und Holzleime. 相似文献
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Lore Thijs Frederik Verhaeghe Tom Craeghs Jan Van Humbeeck Jean-Pierre Kruth 《Acta Materialia》2010,58(9):3303-3312
Selective laser melting (SLM) is an additive manufacturing technique in which functional, complex parts can be created directly by selectively melting layers of powder. This process is characterized by highly localized high heat inputs during very short interaction times and will therefore significantly affect the microstructure. In this research, the development of the microstructure of the Ti–6Al–4V alloy processed by SLM and the influence of the scanning parameters and scanning strategy on this microstructure are studied by light optical microscopy. The martensitic phase is present, and due to the occurrence of epitaxial growth, elongated grains emerge. The direction of these grains is directly related to the process parameters. At high heat inputs it was also found that the intermetallic phase Ti3Al is precipitated during the process. 相似文献
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Recent animal research has demonstrated that humans are not a uniquely aggressive species and that even in so-called violence-prone animals, aggression is always an optional strategy. Although some form of intraspecific aggression exists in every vertebrate species studied thus far, it is also true that all organisms have coevolved equally potent inhibitory mechanisms that enable them to use an aggressive strategy selectively or to suppress aggression when it is in their interest to do so. Parallel studies of aggression in children, assaultive adults, and even entire societies have suggested that humans are exquisitely sensitive to subtle social controls that could be used to reduce the frequency of individual acts of violence. (PsycINFO Database Record (c) 2010 APA, all rights reserved) 相似文献
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A technique for monitoring disturbances using acoustic emission (AE) in superconducting magnets was applied to the superconducting yin-yang magnet pair for the Mirror Fusion Test Facility (MFTF-B) at the Lawrence Livermore National Laboratory (LLNL). Signals from twelve AE sensors mounted on the magnet were recorded during magnet charging tests.A minicomputer-based signal processing technique was then developed for real-time AE event detection, location, and characterization. Acoustic emission events caused by movement of conductors in the energized magnet windings or by structural disturbances such as epoxy cracking and debonding could be identified. The data recorded from the MFTF tests were then analysed.The results showed a wide range of AE activity detected by the sensors. Activity from structure and conductor motion showed different behaviour with increasing magnet current. Sensors mounted in the small radius regions of the magnet exhibited the highest levels of activity, agreeing with analysis of maximum loads and independent magnet voltage monitoring results. 相似文献
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