Relevant bibliographies by topics / Alpha relaxation

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Academic literature on the topic 'Alpha relaxation'

Author: Grafiati
Published: 4 June 2021
Last updated: 1 February 2022

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Journal articles on the topic "Alpha relaxation"

1

Tesfamariam, B. "Thrombin receptor-mediated vascular relaxation differentiated by a receptor antagonist and desensitization." American Journal of Physiology-Heart and Circulatory Physiology 267, no. 5 (1994): H1962—H1967. http://dx.doi.org/10.1152/ajpheart.1994.267.5.h1962.

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The vasorelaxant actions of the serine protease, alpha-thrombin, are selectively blocked by the thrombin active site inhibitors, suggesting that proteolytic cleavage is required for alpha-thrombin-induced release of nitric oxide. Whether these relaxations are caused by interaction with a thrombin receptor was evaluated using a prototype thrombin receptor antagonist, a decapeptide analogue of the tethered ligand thrombin receptor [3-mercapto-propionyl-Phe-Cha-Cha-Arg-Lys-Pro-Asn-Asp-Lys-amide (c186–65)]. In rings of pig coronary arteries with endothelium contracted submaximally with U-46619, th
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Matsuki, T., and T. Ohhashi. "Endothelium and mechanical responses of isolated monkey pulmonary veins to histamine." American Journal of Physiology-Heart and Circulatory Physiology 259, no. 4 (1990): H1032—H1037. http://dx.doi.org/10.1152/ajpheart.1990.259.4.h1032.

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Ring strips of monkey pulmonary veins precontracted with a high concentration of prostaglandin F2 alpha (PGF2 alpha) relaxed in a concentration-dependent manner in response to histamine. Treatment with mepyramine and/or famotidine attenuated the relaxation. 2-Pyridylethylamine (2PEA) and dimaprit caused relaxations in the precontracted preparations, which were inhibited by pretreatment with mepyramine and famotidine, respectively. Removal of endothelium reversed the histamine- and 2PEA-induced relaxations to dose-related contractions. On the other hand, the removal had no effect on the dimapri
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Williams, S. P., G. W. Dorn, and R. M. Rapoport. "Prostaglandin I2 mediates contraction and relaxation of vascular smooth muscle." American Journal of Physiology-Heart and Circulatory Physiology 267, no. 2 (1994): H796—H803. http://dx.doi.org/10.1152/ajpheart.1994.267.2.h796.

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Prostaglandin (PG) I2 elicits a biphasic concentration-response curve in rat aorta: lower concentrations elicit relaxation, whereas at higher concentrations, the relaxation is reversed. The purpose of this study was to investigate 1) the nature of the receptors that mediate these effects and 2) whether the relaxant efficacy of PGI2 is decreased at higher PGI2 concentrations by PGI2-induced contraction. PGI2 (1 microM), the stable PGI2 analogue carbacyclin (1 microM), and PGE1 (3 microM) induced maximal relaxations of 55, 40, and 63%, respectively, of norepinephrine-contracted aorta, whereas hi
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Machová, A., and R. Mach. "Surface relaxation in alpha-iron." Surface Science 211-212 (April 1989): 125–32. http://dx.doi.org/10.1016/0039-6028(89)90762-0.

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Machová, A., and R. Mach. "Surface relaxation in alpha-iron." Surface Science Letters 211-212 (April 1989): A108. http://dx.doi.org/10.1016/0167-2584(89)90310-1.

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Kawai, Y., and T. Ohhashi. "Prostaglandin F2 alpha-induced endothelium-dependent relaxation in isolated monkey cerebral arteries." American Journal of Physiology-Heart and Circulatory Physiology 260, no. 5 (1991): H1538—H1543. http://dx.doi.org/10.1152/ajpheart.1991.260.5.h1538.

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Effects of prostaglandin F2 alpha (PGF2 alpha) on isolated monkey and dog cerebral arteries were investigated to reevaluate PGF2 alpha's possible action on the endothelium. Low concentrations of PGF2 alpha ranging from 10(-11) to 10(-8) M produced a dose-dependent relaxation in the monkey arteries. PGF2 alpha (10(-7) M) produced a transient contraction followed by a small relaxation, whereas higher concentrations (greater than 10(-6) M) of PGF2 alpha induced only contractions. The PGF2 alpha-induced relaxation was not observed in the canine cerebral arteries. The PGF2 alpha-induced relaxation
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Rosolowsky, M., and W. B. Campbell. "Role of PGI2 and epoxyeicosatrienoic acids in relaxation of bovine coronary arteries to arachidonic acid." American Journal of Physiology-Heart and Circulatory Physiology 264, no. 2 (1993): H327—H335. http://dx.doi.org/10.1152/ajpheart.1993.264.2.h327.

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Metabolites of arachidonic acid regulate several physiological processes, including vascular tone. The purpose of this study was to determine which metabolites of arachidonic acid are produced by bovine coronary arteries and which may regulate coronary vascular tone. Arachidonic acid induced a concentration-related, endothelium-dependent relaxation [one-half maximum effective concentration (EC50) of 2 x 10(-7) M and a maximal relaxation of 91 +/- 2% at 10(-5) M] of bovine coronary arteries that were contracted with U-46619, a thromboxane mimetic. The concentration of 6-ketoprostaglandin F1 alp
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Figl, A., C. Labarca, N. Davidson, H. A. Lester, and B. N. Cohen. "Voltage-jump relaxation kinetics for wild-type and chimeric beta subunits of neuronal nicotinic receptors." Journal of General Physiology 107, no. 3 (1996): 369–79. http://dx.doi.org/10.1085/jgp.107.3.369.

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We have studied the voltage-jump relaxation currents for a series of neuronal nicotinic acetylcholine receptors resulting from the coexpression of wild-type and chimeric beta 4/beta 2 subunits with alpha 3 subunits in Xenopus oocytes. With acetylcholine as the agonist, the wild-type alpha 3 beta 4 receptors displayed five- to eightfold slower voltage-jump relaxations than did the wild-type alpha 3 beta 2 receptors. In both cases, the relaxations could best be described by two exponential components of approximately equal amplitudes over a wide range of [ACh]'s. Relaxation rate constants increa
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Baccari, M. C., C. Iacoviello, and F. Calamai. "Nitric oxide as modulator of cholinergic neurotransmission in gastric muscle of rabbits." American Journal of Physiology-Gastrointestinal and Liver Physiology 273, no. 2 (1997): G456—G463. http://dx.doi.org/10.1152/ajpgi.1997.273.2.g456.

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The effects of the nitric oxide (NO) synthesis inhibitors, NG-nitro-L-arginine (L-NNA) and NG-nitro-L-arginine methyl ester (L-NAME), on the electrical field stimulation (EFS)-induced inhibitory responses were investigated. EFS caused, in strips contracted by means of substance P (SP), prostaglandin F2 alpha (PGF2 alpha), or carbachol (CCh), a fast relaxant response that, depending on stimulation frequency and strip tension, could be followed by a slower, sustained relaxation. The NO synthesis inhibitors blocked the EFS-induced fast relaxations and often reversed them into contractions; these
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Cabell, F., D. S. Weiss, and J. M. Price. "Inhibition of adenosine-induced coronary vasodilation by block of large-conductance Ca(2+)-activated K+ channels." American Journal of Physiology-Heart and Circulatory Physiology 267, no. 4 (1994): H1455—H1460. http://dx.doi.org/10.1152/ajpheart.1994.267.4.h1455.

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The aim of the present study was to investigate the contribution of large-conductance calcium-activated potassium (large-conductance KCa) channels to adenosine (Ado)- and nitroprusside-mediated relaxation in small coronary arteries. Canine subepicardial arteries (170 +/- 23 microns at 120 mmHg) were studied as in vitro pressurized vessels. Pressure-diameter experiments showed myogenic tone over a physiological range of pressures. Tone was increased with the thromboxane A2 analogue 9,11-dideoxy-11 alpha,9 alpha-epoxy-methanoprostaglandin F2 alpha (U-46619). Tetraethylammonium (TEA+; 1 mM) signi
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Dissertations / Theses on the topic "Alpha relaxation"

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Mohammad, Husam Ahmad Hussein. "23Na/51 V-NMR study of (Alpha)´- NaV2O5." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2007. http://nbn-resolving.de/urn:nbn:de:swb:14-1184506398738-25661.

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In this work I present a 23Na/51V-NMR study of sodium vanadate as pure compound, and the influence of very small amounts of Sodium substitution by Calcium and Lithium is reported and discussed. The measurements of spin-lattice relaxation for 23Na and 51V are also presented. The sodium vanadate is found to have a double phase transition. The two transitions are close together and take place around 34 K. Above the transition temperature there is one V site in the mixed oxidation state 4.5+ and there is one Na site. A consistency for a number of un-doped and very slightly doped samples of three v
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Mohammad, Husam Ahmad Hussein. "23Na/51 V-NMR study of (Alpha)´- NaV2O5." Doctoral thesis, Technische Universität Dresden, 2006. https://tud.qucosa.de/id/qucosa%3A23903.

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In this work I present a 23Na/51V-NMR study of sodium vanadate as pure compound, and the influence of very small amounts of Sodium substitution by Calcium and Lithium is reported and discussed. The measurements of spin-lattice relaxation for 23Na and 51V are also presented. The sodium vanadate is found to have a double phase transition. The two transitions are close together and take place around 34 K. Above the transition temperature there is one V site in the mixed oxidation state 4.5+ and there is one Na site. A consistency for a number of un-doped and very slightly doped samples of three v
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Saiter-Fourcin, Allison. "Contribution à l'étude de la relaxation principale alpha et des cinétiques de relaxation dans des polymères vitreux : fragilité et approches entropiques." Rouen, 2002. http://www.theses.fr/2002ROUES052.

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Ce travail contribue à l'étude de la relaxation principale a et des cinétiques de relaxation dans différentes familles de polymères, et plus particulièrement dans une famille de polymères linéaires semi-rigides pour laquelle la longueur de la chaîne latérale varie. Des mesures réalisées par Analyse Enthalpique Différentielle ont montré que les variations de ce paramètre structural avaient une faible influence sur les valeurs des paramètres caractérisant le domaine de transition vitreuse et les cinétiques de relaxation. La caractérisation du liquide formateur de verre a permis de montrer entre
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EL, AMRANI ABDEL-ILAH. "Couplage contraction-relaxation et pharmacologie du myocarde normal et pathologique de mammiferes : influence de la stimulation alpha-adrenergique." Paris 11, 1990. http://www.theses.fr/1990PA112340.

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Dans le myocarde de mammiferes, la phase de relaxation est modulee par le niveau de la charge. En utilisant la technique du muscle papillaire isole du ventricule gauche, nous avons etudie le couplage contraction-relaxation au cours d'interventions pharmacologiques ou pathologiques. Nous avons montre que les agonistes alpha et beta-adrenergiques induisaient independamment du niveau de la charge des effets isotropes et lusitropes positifs dans le myocarde normal de rat. Contrairement aux agonistes beta-adrenergiques qui diminuent le couplage contraction-relaxation independamment du niveau de la
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Svobodová, Eva. "Alfa monitor." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2014. http://www.nusl.cz/ntk/nusl-220866.

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The master´s thesis presents the problems of EEG biofeedback and its application to relax people. The first part discusses the properties of EEG signal , the requirements of the standard EEG and also distribusion signal into different frequency bands. The main essence of the work is the design and realization of Alfa Monitor – a device for relaxation , that for implamanting EEG biofeedback uses acoustic form and sensing of electrical activity of brain in the region of alpha waves. The second half of the work is t focused on circuit design, using integrated circuits with component values of rel
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Prudil, Pavel. "Alfa monitor." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2010. http://www.nusl.cz/ntk/nusl-218645.

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This master‘s thesis presents the problems of EEG bio-feedback and its application for relaxing a person. It deals with the requirements of the sensing electrode and the biological signal amplifiers. The main substance of my thesis is the proposal of Alpha monitor, a device that uses the electrical activity of alpha brain waves for the realization of biological EEG feedback. The device concept takes into consideration the requirements of users’ security and also characteristics of alpha activity, which define the requirements for signal processing circuits and for propositions of the aural tra
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Young, Matthew Alexander. "A site-directed spin labelling study of the human alpha-lactalbumin molten globule." Thesis, University of Oxford, 2013. http://ora.ox.ac.uk/objects/uuid:cdc9904d-77cc-4d20-b01d-096bc2b16d72.

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The human α-lactalbumin (α-LA) molten globule formed at low pH is a model for the study of protein folding intermediates. The molten globule lacks native-like side-chain interactions, resulting in a fluctuating ensemble of tertiary structures, characterisation of which has been precluded by severe line-broadening in NMR spectra and a lack of long-range NOEs. Paramagnetic relaxation enhancements (PREs) have been measured in a variant of α-LA in which all native cysteines have been mutated to alanine (all-Ala α-LA). Cysteine residues have been mutated into regions of inte
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Sadílek, Jiří. "Vliv teplotní historie na vztah mezi strukturou a vlastnostmi orientovaného polypropylenu." Doctoral thesis, Vysoké učení technické v Brně. Fakulta chemická, 2010. http://www.nusl.cz/ntk/nusl-233317.

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The aim of this work is to study the effect of thermal history to structure and properties not only of oriented polypropylene monofilaments with different orientation but of course of isotropic non-oriented polypropylene. Term thermal history includes thermal regimes from alpha relaxation temperature (T?) to melting temperature (Tm). This work consists of three parts. The changes of dynamic mechanical properties, strength, deformation and tensile modulus of polypropylene samples according to annealing temperature (Ta) are described in the first part of this work. In the second part, the change
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Kašpar, Blahoslav. "Monitor alfa aktivity." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2012. http://www.nusl.cz/ntk/nusl-219517.

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This work deals with problems of EEG biofeedback and possibilities of its use in therapy. The method of EEG biofeedback helps patients to achieve the state of relaxation. It is a noninvasive treatment modality. The paper also discussed the requirements for each component unit. The main point of a design and construction of Alpha activity monitor, a device implementing EEG biofeedback focused on sensing electrical activity of the brain, specifically alpha waves. Alpha activity is specific and their parameters are taken into account when selecting components and construction equipment. Custom fe
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Muzeau, Elisabeth. "Etude des relaxations mécaniques alpha et bêta du PMMA, du PS et de leurs copolymères." Lyon, INSA, 1992. http://www.theses.fr/1992ISAL0042.

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Les relaxations mécaniques alpha et bêta de polymères morphes ont été étudiées par spectrométrie mécanique dynamique dans le but de comprendre le rapport entre les propriétés mécanique dynamique et la structure chimique des systèmes. Pour cela, les matériaux poly(méthacrylate de méthyle) (PMMA) et polystyrène (PS) ont été choisis ainsi que des copolymères de ces deux systèmes. L'analyse des spectres de relaxation bêta du PMMA a permis d'attribuer la distribution des temps caractéristiques à une distribution très large du facteur entropique ainsi qu'une distribution plus étroite du facteur étro
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Books on the topic "Alpha relaxation"

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Halpern, Steven. Deep alpha: 8 hz brainwave synchronization for meditation and healing. Inner Peace Music, 2012.

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Alpha Relaxation System(cas)RelaxationCo. Relaxation Company, 1999.

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Thompson, Jeffrey. Alpha Relaxation System. Relaxation Company, 2001.

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Thompson, Jeffrey. Alpha Relaxation System. Relaxation Company, 2004.

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Thompson, Jeffrey. Rainforest & Ocean Waves (Alpha Relaxation Solution). Relaxation Company, 2006.

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The effect of auditory subliminal relaxation messages and alpha synthesizer on relaxation. 1991.

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Thompson, Jeffrey. BrainFitness Alpha Relaxation: Soothe Your Mind and Body. Relaxation Company, 2005.

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Thompson, Jeffrey. Alpha Relaxation System: Soothe Your Body Calm Your Mind Enhance Your Health. Relaxation Company, 1999.

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Wise, Anna. High Performance Mind: Mastering Brainwaves for Relaxation, Insight, Healing and Creativity. Relaxation Company, 1998.

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Conference papers on the topic "Alpha relaxation"

1

Dooley, J. W., and S. L. Turchi. "200 MHz Ultrasonic Relaxation Peak in the Enzyme Alpha-Amylase." In IEEE 1987 Ultrasonics Symposium. IEEE, 1987. http://dx.doi.org/10.1109/ultsym.1987.199106.

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Narahari Achar, B. N., and John W. Hanneken. "Damping in a Fractional Relaxor-Oscillator Driven by a Harmonic Force." In ASME 2005 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2005. http://dx.doi.org/10.1115/detc2005-84345.

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It is shown that the so called fractional Relaxor-Oscillator, characterized by an index of fractional order, alpha, exhibits interesting relaxation-oscillation characteristics when subjected to a sinusoidal forcing. For the range of values 0 < alpha <1, the system exhibits some characteristics of a regular relaxor, and for the range 1 < alpha <2, some characteristics of a damped harmonic oscillator. But in the dynamic response to a sinusoidal forcing, there are characteristic features which have no parallel either in the regular relaxor or the damped harmonic oscill
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Aris, Siti Armiza Mohd, Sahrim Lias, and Mohd Nasir Taib. "The relationship of alpha waves and theta waves in EEG during relaxation and IQ test." In 2010 2nd International Congress on Engineering Education (ICEED 2010). IEEE, 2010. http://dx.doi.org/10.1109/iceed.2010.5940766.

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Comez, L., Daniele Fioretto, L. Palmieri, et al. "Dielectric and light scattering analysis of the <alpha>-relaxation of an epoxy system." In International Conference on Dielectric and Related Phenomena '98, edited by Andrzej Wlochowicz. SPIE, 1999. http://dx.doi.org/10.1117/12.373694.

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Yusuf, Md Salah Uddin, Monira Islam, and Shidhartho Roy. "Stress Identification during Sustained Mental Task and Brain Relaxation Modeling with $\beta/\alpha$ Band Power Ratio." In 2019 4th International Conference on Electrical Information and Communication Technology (EICT). IEEE, 2019. http://dx.doi.org/10.1109/eict48899.2019.9068748.

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