نتایج جستجو برای: merrf
تعداد نتایج: 762 فیلتر نتایج به سال:
Single painful stimuli evoke two successive and qualitatively distinct sensations referred to as first and second pain sensation. Peripherally, the neural basis of this phenomenon is a dual pathway for pain with Adelta and C fibers mediating first and second pain, respectively. Yet, the differential cortical correlates of both sensations are largely unknown. We therefore used magnetoencephalogr...
In animals, the J reflex evoked by pulmonary C fibers provides potent inhibition of limb muscles and would act to limit exercise. However, recent work shows that although activation of these fibers causes severe respiratory discomfort, it does not impair the output of limb motoneurons to voluntary, reflex, or locomotor drives in awake humans.
Zeolite fibers have attracted growing interest for a range of new applications because of their structural particularity while maintaining the intrinsic performances of the building blocks of zeolites. The fabrication of uniform zeolite fibers with tunable hierarchical porosity and further exploration of their catalytic potential are of great importance. Here, we present a versatile and facile ...
1. Grassmann A, et al. Nephrol Dial Transplant 2005;20:2587–93. 2. Covic A, et al. Clin Nephrol 2010;74(suppl 1):S23–7. 3. US Renal Data System. 2012. Available at: http://www.usrds.org/atlas.aspx 4. Zelmer JL. Kidney Int 2007;72:1122–9. 5. Kerr M, et al. Nephrol Dial Transplant 2012;27(suppl 3):iii73–80. 6. Villa G, et al. Nephrol Dial Transplant 2011;26:3709–14. 7. Gordois A, et al. J Diabete...
In the past it was widely believed that pain and itching are transmitted by the same nerve pathway with the low intensity stimulation of unmyelinated polymodal C fibers resulting in sensation of pruritus whereas high intensity stimulation causing pain. In recent experiments however, stimulation of single unmyelinated C fibers led to the identification of two kinds of fibers. Stimulation of most...
The exposure of an optical fiber to hydrogen has the potential to change the fiber’s performance in several ways. The optical communications industry has been studying these changes for some time and has gained a great deal of knowledge regarding their various causes and effects. This white paper briefly describes some of the different ways that hydrogen can affect optical fibers and illustrate...
Optical fibers were used to induce fluorescence by means of two-photon absorption in fluorophores. The effect, studied in a solution of 4',6-diamidino-2-phenylindole, demonstrated that a single-mode fiber is a more efficient two-photon excitation source than a multimode fiber. This was shown with three different fibers.
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