Search results for: E. Takacs

Items from 1 to 20 out of 54 results

article

High-resolution X-ray spectroscopy of highly charged tungsten EBIT plasma

S.C. Sanders, R. Silwal, B.H. Rudramadevi, A.C. Gall, more

Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions... > 2018 > 431 > C > 47-54

Highly charged tungsten transitions can be used as a diagnostic tool for investigating performance of the fusion device. Systematic spectroscopic investigations of the radiative decay channels of the tungsten charge states allow for extending the fundamental understanding of highly charged ions and can serve as a diagnostic tool to improve applied plasma research. Electron beam ion traps (EBIT) offer...

article

Duration and timing of daily light exposure influence the rapid shifting of BALB/cJ mouse circadian locomotor rhythms

Thomas J. Vajtay, Jeremy J. St. Thomas, Tyrus E. Takacs, Eric G. McGann, more

Physiology & Behavior > 2017 > 179 > C > 200-207

Photic entrainment of the murine circadian system can typically be explained with a discrete model in which light exposures near dusk and dawn can either advance or delay free-running rhythms to match the external light cycle period. In most mouse strains, the magnitude of those phase shifts is limited to several hours per day; however, the BALB/cJ mouse can re-entrain to large (6–8hour) phase advances...

article

Uranium mineralization indicators from seismic and well log data in the Shea Creek area at the southern margin of the Carswell impact structure, Athabasca Basin, Canada

Z. Hajnal, E. Takacs, B. Pandit, I.R. Annesley

Geophysical Prospecting > 63 > 4 > 861 - 880

The primary economic uranium (U) mineralization indicators in the Athabasca Basin are the reactivated prominent basement deformation zones, basement alteration halos, and the overlying sandstone alteration halos enveloping the deposit. High‐resolution seismic surveys, from the Shea Creek area, are investigated to assess the potential of the surface seismic reflection technique for detecting these...

chapter

Reference database driven statistical analysis of automated frameless CT-MRI registration developed for radiosurgical investigations

G. Opposits, S.A. Kis, T. Spisak, E. Berenyi, more

2012 IEEE Nuclear Science Symposium and Medical Imaging Conference Record (NSS/MIC) > 2780 - 2782

2012 IEEE Nuclear Science Symposium and Medical Imaging Conference (2012 NSS/MIC)

The aims of this study were (1) to describe statistically the fluctuation of the goodness of automated CT-MRI registration method (2) to evaluate a numerical parameter, scaled to [0,1] interval (lambda), for characterizing the population level accuracy of any automated CT-MRI registration algorithm on voxel similarity basis. The population level distribution of cross-correlation values between the...

article

Event related potential manifestations of the oblique effect

L. Balázs, I. Barkaszi, I. Czigler, I. Sulykos, more

International Journal of Psychophysiology > 2012 > 85 > 3 > 323

article

The considering the galvanic and induction effects in the inversion of vertical electric dipole transillumination measurement

E. Takács

Acta Geodaetica et Geophysica > 2012 > 47 > 2 > 223-232

The use of vertical electric dipole transmitter and receiver turns out to be advantageous in the exploration of lateral inhomogeneities of high resistivity layers by transillumination measurement. Geological information can be made clearer by transformation of the amplitude response to apparent resistivity spectrum. The apparent resistivity calculated by the geometric factor in the quasistationary...

article

A preliminary study of symptomatic fatigue in rural older adults

Kathleen F. Tennant, Steven E. Takacs, Jen-Tzer Gau, Brian C. Clark, more

Aging Clinical and Experimental Research > 2012 > 24 > 4 > 324-330

Background and aims: The purpose of this study was to evaluate the prevalence of symptomatic fatigue and its relation to physical function and self-perceived health in a sample of older, rural community-dwelling adults with commonly-used clinical fatigue scales. Methods: This is an exploratory, descriptive study of 30 subjects from 4 rural counties. All subjects were 70+ years of age and had no recent...

article

Calculated and measured transient product yields in pulse radiolysis of aqueous solutions: Concentration dependence

T. Pálfi, L. Wojnárovits, E. Takács

Radiation Physics and Chemistry > 2010 > 79 > 11 > 1154-1158

Pulse radiolysis of aqueous solutions was modeled by using 54 equations for the reaction of water radiolysis intermediates with carefully selected rate coefficients. Yields of products formed in the hydrated electron+solute and hydroxyl radical+solute reactions were calculated and compared with the measured yields in wide concentration range. These reactions are in competition with the reactions of...

article

Radiation-induced grafting of cellulose for adsorption of hazardous water pollutants: A review

L. Wojnárovits, Cs.M. Földváry, E. Takács

Radiation Physics and Chemistry > 2010 > 79 > 8 > 848-862

This review paper briefly introduces the radiation chemistry of cellulose, the different grafting techniques used, and the methods of characterization of the grafted material. It shows the application of the grafted polymer for the removal of water pollutants and also the regeneration of the adsorbent.

article

Hydrophilic/hydrophobic character of grafted cellulose

E. Takács, L. Wojnárovits, J. Borsa, I. Rácz

Radiation Physics and Chemistry > 2010 > 79 > 4 > 467-470

Vinyl monomers with long paraffin chains were grafted onto two kinds of cellulose (cotton and cotton linter) by direct irradiation grafting technique. The effect of dose, monomer structure and concentration, as well as homopolymer suppressor (styrene) concentration on the grafting yield was studied and the optimal grafting conditions were established. Grafting decreased the swelling of the samples...

article

Study of solvent–protein coupling effects by neutron scattering

B. Varga, F. Migliardo, E. Takacs, B. Vertessy, more

Journal of Biological Physics > 2010 > 36 > 2 > 207-220

The present work aims to characterize the dynamical behavior of proteins immersed in bio-preserving liquids and glasses. For this purpose, the protein dUTPase was chosen, while the selected solvents were glycerol, a triol, and some homologous disaccharides, i.e., trehalose, maltose, and sucrose, which are known to be very effective bio-preserving agents. The results highlight that the disaccharides...

article

Radiolytic degradation of 2,4-dichlorophenoxyacetic acid in dilute aqueous solution: pH dependence

R. Homlok, E. Takács, L. Wojnárovits

Journal of Radioanalytical and Nuclear Chemistry > 2010 > 284 > 2 > 415-419

The reactions of hydroxyl radical and hydrated electron intermediates of water radiolysis were studied in the radiolytic degradation of 2,4-dichlorophenoxyacetic acid (2,4-D) at pH values of 4, 6 and 8. The hydrated electron reactions are also suggested to contribute to the aromatic ring decomposition in addition to the highly effective hydroxyl radical reactions. The experimental results suggest...

article

Radiolytic degradation of gallic acid and its derivatives in aqueous solution

R. Melo, J.P. Leal, E. Takács, L. Wojnárovits

Journal of Hazardous Materials > 2009 > 172 > 2-3 > 1185-1192

Polyphenols, like gallic acid (GA) released in the environment in larger amount, by inducing some unwanted oxidations, may constitute environmental hazard: their concentration in wastewater should be controlled. Radiolytic degradation of GA was investigated by pulse radiolysis and final product techniques in dilute aqueous solution. Subsidiary measurements were made with 3,4,5-trimethoxybenzoic acid...

article

eIF1 Controls Multiple Steps in Start Codon Recognition during Eukaryotic Translation Initiation

Jagpreet S. Nanda, Yuen-Nei Cheung, Julie E. Takacs, Pilar Martin-Marcos, more

Journal of Molecular Biology > 2009 > 394 > 2 > 268-285

Eukaryotic translation initiation factor (eIF) 1 is a central mediator of start codon recognition. Dissociation of eIF1 from the preinitiation complex (PIC) allows release of phosphate from the G-protein factor eIF2, triggering downstream events in initiation. Mutations that weaken binding of eIF1 to the PIC decrease the fidelity of start codon recognition (Sui ⁻ phenotype) by allowing increased...

article

Exploration of lateral sequence-discontinuities using the vertical magnetic field generated by vertical electric dipole placed in borehole

E. Takács, G. Pethő

Acta Geodaetica et Geophysica > 2009 > 44 > 2 > 167-178

Possibilities of detection of abrupt lateral conductivity changes are presented by mapping of the surface vertical magnetic field in the vicinity of the borehole. Magnetic field components generated by vertical electric bipole do not exist over a uniform or horizontally layered earth. Vertical magnetic field is caused exclusively by resistivity inhomogeneities. Therefore it is very sensitive to lateral...

article

Ion guiding in alumina capillaries: MCP images of the transmitted ions

Z. Juhász, B. Sulik, S. Biri, I. Iván, more

Nuclear Inst. and Methods in Physics Research, B > 2009 > 267 > 2 > 321-325

Transmission of a few keV impact energy Ne ⁶⁺ ions through capillaries in anodic alumina membranes has been studied with different ion counting methods using an energy dispersive electrostatic spectrometer, a multichannel plate (MCP) array and sensitive current-measurement. In the present work, we focus our attention to the measurements with the MCP array. The alumina capillaries were prepared...

article

Experimental study on dUTPase-inhibitor candidate and dUTPase/disaccharide mixtures by PCS and ENS

B. Varga, F. Migliardo, E. Takacs, B. Vertessy, more

Journal of Molecular Structure > 2008 > 886 > 1-3 > 128-135

The present work is focused on the structural and dynamical properties of dUTPase-inhibitor candidate and dUTPase/disaccharide mixtures investigated by Photon Correlation Spectroscopy (PCS) and Elastic Neutron Scattering (ENS).PCS findings emphasise that the dUTPase hydrodynamic radius in solution does not change at low disaccharide concentrations, while reveal, at high disaccharide concentration,...

article

Neutron scattering studies on dUTPase complex in the presence of bioprotectant systems

B. Varga, F. Migliardo, E. Takacs, B. Vertessy, more

Chemical Physics > 2008 > 345 > 2-3 > 250-258

The aim of the present work is to investigate the chemical physics mechanisms of protein stabilization by homologous disaccharides (trehalose, maltose and sucrose). On this purpose the structural and dynamical properties of dUTPase-inhibitor candidate and dUTPase-inhibitor candidate/disaccharide mixtures have been investigated by elastic neutron scattering (ENS), quasi-elastic neutron scattering (QENS)...

article

Information-content of the electric bipole source frequency sounding curves in the transition zone

E. Takács, G. Pethő

Acta Geodaetica et Geophysica > 2008 > 43 > 4 > 369-381

Numerical studies indicate that information can be gained about the layering even in the transition zone of the source, down to a considerable depth with a properly planned frequency sounding measuring system. As it has been demonstrated, the high resistivity basement can be revealed even with a source-receiver separation 2-times larger than its depth. Model studies demonstrate that the transformation...

article

Comparison of simultaneous and pre-irradiation grafting of N-vinylpyrrolidone to cotton-cellulose

E. Takács, H. Mirzadeh, L. Wojnárovits, J. Borsa, more

Nuclear Inst. and Methods in Physics Research, B > 2007 > 265 > 1 > 217-220

Cotton-cellulose samples with modified surface properties were prepared by simultaneous and pre-irradiation grafting methods, respectively, using N-vinylpyrrolidone monomer. In the mutual grafting experiments Mohr salt was used to avoid homopolymer formation. Under optimal conditions a few percent grafting was obtained by pre-irradiation grafting while in the case of mutual grafting the yields were...

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Search results for: E. Takacs

High-resolution X-ray spectroscopy of highly charged tungsten EBIT plasma

Duration and timing of daily light exposure influence the rapid shifting of BALB/cJ mouse circadian locomotor rhythms

Uranium mineralization indicators from seismic and well log data in the Shea Creek area at the southern margin of the Carswell impact structure, Athabasca Basin, Canada

Reference database driven statistical analysis of automated frameless CT-MRI registration developed for radiosurgical investigations

Event related potential manifestations of the oblique effect

The considering the galvanic and induction effects in the inversion of vertical electric dipole transillumination measurement

A preliminary study of symptomatic fatigue in rural older adults

Calculated and measured transient product yields in pulse radiolysis of aqueous solutions: Concentration dependence

Radiation-induced grafting of cellulose for adsorption of hazardous water pollutants: A review

Hydrophilic/hydrophobic character of grafted cellulose

Study of solvent–protein coupling effects by neutron scattering

Radiolytic degradation of 2,4-dichlorophenoxyacetic acid in dilute aqueous solution: pH dependence

Radiolytic degradation of gallic acid and its derivatives in aqueous solution

eIF1 Controls Multiple Steps in Start Codon Recognition during Eukaryotic Translation Initiation

Exploration of lateral sequence-discontinuities using the vertical magnetic field generated by vertical electric dipole placed in borehole

Ion guiding in alumina capillaries: MCP images of the transmitted ions

Experimental study on dUTPase-inhibitor candidate and dUTPase/disaccharide mixtures by PCS and ENS

Neutron scattering studies on dUTPase complex in the presence of bioprotectant systems

Information-content of the electric bipole source frequency sounding curves in the transition zone

Comparison of simultaneous and pre-irradiation grafting of N-vinylpyrrolidone to cotton-cellulose

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