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Krisztina Benedek 대한파킨슨병및이상운동질환학회 2023 Journal Of Movement Disorders Vol.16 No.1
Task-specific oromandibular tremor is present only while the patient is performing a special task. Many cases are medically intractable, and the therapy of choice has been botulinum toxin (BoNT) injections.
Altered potassium ATP channel signaling in mesenteric arteries of old high salt-fed rats
Melissa A Whidden,Bilgen Basgut,Nataliya Kirichenko,Benedek Erdos,Nihal Tumer 한국운동영양학회 2016 Physical Activity and Nutrition (Phys Act Nutr) Vol.20 No.2
Purpose: Both aging and the consumption of a high salt diet are associated with clear changes in the vascular system that can lead to the development of cardiovascular disease; however the mechanisms are not clearly understood. Therefore, we examined whether aging and the consumption of excess salt alters the function of potassium ATP-dependent channel signaling in mesenteric arteries. Methods: Young (7 months) and old (29 months) Fischer 344 x Brown Norway rats were fed a control or a high salt diet (8% NaCl) for 12 days and mesenteric arteries were utilized for vascular reactivity measurements. Results: Acetylcholine-induced endothelium relaxation was significantly reduced in old arteries (81 ± 4%) when compared with young arteries (92 ± 2%). Pretreatment with the potassium-ATP channel blocker glibenclamide reduced relaxation to acetylcholine in young arteries but did not alter dilation in old arteries. On a high salt diet, endothelium dilation to acetylcholine was significantly reduced in old salt arteries (60 ± 3%) when compared with old control arteries (81 ± 4%). Glibenclamide reduced acetylcholine-induced dilation in young salt arteries but had no effect on old salt arteries. Dilation to cromakalim, a potassium-ATP channel opener, was reduced in old salt arteries when compared with old control arteries. Conclusions: These findings demonstrate that aging impairs endothelium-dependent relaxation in mesenteric arteries. Furthermore, a high salt diet alters the function of potassium-ATP-dependent channel signaling in old isolated mesenteric arteries and affects the mediation of relaxation stimuli.
( Semil S Gocmez ),( Philip J Scarpace ),( Melissa A Whidden ),( Benedek Erdos ),( Nataliya Kirichenko ),( Yasemin Sakarya ),( Tijen Utkan ),( Nihal Tumer ) 한국운동영양학회 2016 Physical Activity and Nutrition (Phys Act Nutr) Vol.20 No.1
[Purpose] To determine whether resveratrol improves the adverse effects age on vascular function in mesenteric arteries (MAs), and diminishes the hyperactivity in adrenal gland with age. [Methods] Male F344 x Brown Norway rats were assigned to 6-month control (YC), 6-month resveratrol (YR), 24-month control (OC) and 24-month resveratrol (OR). Resveratrol (15 mg/kg) was provided to resveratrol groups in drinking water for 14 days. [Results] Concentration response curves to phenylephrine (PE, 10(-9)-10(-5)M), acetylcholine (Ach, 10(-9)-10(-5)M) and resveratrol (10(-8)-10(-4)M) were evaluated in pressurized isolated MAs. The Ach concentration-response curve was right shifted with maximal response diminished in OC compared with YC rats. These effects were reversed by resveratrol treatment. The resveratrol-mediated relaxant responses were unchanged with age or resveratrol suggesting an endothelium-independent mechanism. Resveratrol tended to increase endothelial nitric oxide synthase; caused no effect on copper-zinc superoxide dismutase; and normalized the age-related elevatation in DβH and NPY levels in adrenal medulla, two indicators of sympathetic activity [Conclusion] These data indicate that resveratrol reverses age-related dysfunction in endothelium-dependent vasodilation in MAs and partially reverses hyperactivity of adrenomedullary function with age. This treatment may have a therapeuticpotential in the treatment of cardiovascular diseases or hypertension in the elderly.
THE POWER OF PROGRAMMED GRAMMARS WITH GRAPHS FROM VARIOUS CLASSES
Barbaiani, Madalina,Bibire, Cristina,Dassow, Jurgen,Delaney, Aidan,Fazekas, Szilard,Ionescu, Mihai,Liu, Guangwu,Lodhi, Atif,Nagy, Benedek 한국전산응용수학회 2006 Journal of applied mathematics & informatics Vol.22 No.1
Programmed grammars, one of the most important and well investigated classes of grammars with context-free rules and a mechanism controlling the application of the rules, can be described by graphs. We investigate whether or not the restriction to special classes of graphs restricts the generative power of programmed grammars with erasing rules and without appearance checking, too. We obtain that Eulerian, Hamiltonian, planar and bipartite graphs and regular graphs of degree at least three are pr-universal in that sense that any language which can be generated by programmed grammars (with erasing rules and without appearance checking) can be obtained by programmed grammars where the underlying graph belongs to the given special class of graphs, whereas complete graphs, regular graphs of degree 2 and backbone graphs lead to proper subfamilies of the family of programmed languages.
The power of programmed grammars with graphs from various classes
Madalina Barbaiani,Cristina Bibire,J urgen Dassow,Aidan Delaney,Szilard Fazekas,Mihai Ionescu,Guangwu Liu,Atif Lodhi,Benedek Nagy 한국전산응용수학회 2006 Journal of applied mathematics & informatics Vol.22 No.1-2
Programmed grammars, one of the most important and well investigated classes of grammars with context-free rules and a mechanism controlling the application of the rules, can be described by graphs. We investigate whether or not the restriction to special classes of graphs re- stricts the generative power of programmed grammars with erasing rules and without appearance checking, too. We obtain that Eulerian, Hamil- tonian, planar and bipartite graphs and regular graphs of degree at least three are pr-universal in that sense that any language which can be gener- ated by programmed grammars (with erasing rules and without appearance checking) can be obtained by programmed grammars where the underly- ing graph belongs to the given special class of graphs, whereas complete graphs, regular graphs of degree 2 and backbone graphs lead to proper subfamilies of the family of programmed languages.
Mechanical Control of Electroresistive Switching
Kim, Yunseok,Kelly, Simon J.,Morozovska, Anna,Rahani, Ehsan Kabiri,Strelcov, Evgheni,Eliseev, Eugene,Jesse, Stephen,Biegalski, Michael D.,Balke, Nina,Benedek, Nicole,Strukov, Dmitri,Aarts, J.,Hwang, I American Chemical Society 2013 Nano letters Vol.13 No.9
<P>Hysteretic metal–insulator transitions (MIT) mediated by ionic dynamics or ferroic phase transitions underpin emergent applications for nonvolatile memories and logic devices. The vast majority of applications and studies have explored the MIT coupled to the electric field or temperarture. Here, we argue that MIT coupled to ionic dynamics should be controlled by mechanical stimuli, the behavior we refer to as the piezochemical effect. We verify this effect experimentally and demonstrate that it allows both studying materials physics and enabling novel data storage technologies with mechanical writing and current-based readout.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/nalefd/2013/nalefd.2013.13.issue-9/nl401411r/production/images/medium/nl-2013-01411r_0005.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/nl401411r'>ACS Electronic Supporting Info</A></P>