I Földeş

Wigner Research Centre for Physics

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S. Szatmári

University of Szeged

J. S. Bakos

National Public Health and Medical Officer Service

János Minárovits

University of Szeged

László Módis

University of Debrecen

E Komlós

Országos Korányi Tbc és Pulmonológiai Intézet

P.N. Ignácz

Wigner Research Centre for Physics

E Karczag

National Center for Epidemiology

G. D. Tsakiris

Max Planck Institute of Quantum Optics

M. Aladi

Wigner Research Centre for Physics

L. Veisz

Umeå University

Cooperative Institutions

Hungarian Academy of Sciences

109

Max Planck Institute of Quantum Optics

University of Debrecen

Semmelweis University

Max Planck Society

University of Szeged

Ludwig-Maximilians-Universität München

Wigner Research Centre for Physics

Eötvös Loránd University

Centre National de la Recherche Scientifique

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Homologies between small nuclear RNAs and sequences and their possible role in the cytopathic effect of the virus

Medical Hypotheses (1987)

János Minárovits Judit Segesdi Zoltán Kovács I Földeş

10.1016/0306-9877(87)90005-3

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Citations (2)

Measurement of ion emission from plasmas obtained with a 600 fs KrF laser

Physica Scripta (2014)

L. Ryć A. Barna L. Calcagno I Földeş P. Parys

Ion emission from plasmas obtained by the use of a 600 fs, 36 mJ KrF laser operating at 248 nm was measured and analysed for a variety of targets at different laser intensities. The intensity was set by changing the distance between the focusing lens and the target. It was found that the ions emitted originate from impurities and ions from the bulk of the target can be produced only in the subsequent shots. Proton emission was identified from some targets, but the energy of the protons was low (less than 12 keV). A new silicon carbide semiconductor detector proved to be applicable for the collection of the ions.

10.1088/0031-8949/2014/t161/014032

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Citations (3)

Dysfunction of natural killer cells in multiple sclerosis: a possible pathogenetic factor.

PubMed (1980)

M. Benczúr G G Petrányl G Pálffy M Varga M Tálas

Natural killer (NK) cell activity, antibody-dependent cytotoxicity (ADCC) and the effect of interferon on NK activity was investigated in multiple sclerosis (MS) patients. NK activity measured against K-562 tumour cell line was found to be significantly low in MS patients, and this was most pronounced in the group of male patients with definitive disease. The response of NK cells to interferon proved to be impaired and almost no activation could be demonstrated in response to polyinosinic-polycytidylic acid (poly I:C). Preliminary data obtained by the determination of interferon production in several definitive MS cases reflect a defect in the interferon producing capacity of lymphocytes. The possible involvement of impaired NK cell function in the aetiopathogenesis of MS is discussed.

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Citations (167)

Multi-μJ harmonic emission energy from laser-driven plasma

Applied Physics B (2014)

Patrick Heissler A. Barna J. M. Mikhailova Guangjin Ma K. Khrennikov

We report on simultaneous efficiency and divergence measurements for harmonics from solid targets generated by the relativistic oscillating mirror mechanism. For a value of the normalized vector potential of $$a_{\mathrm{L}}\simeq 1.5$$ , we demonstrate the generation of 30 μJ high-harmonic radiation in a $$17\pm 3$$ mrad divergence cone. This corresponds to a conversion efficiency of $$\gtrsim$$ 10−4 in the 17–80 nm range into a well-confined beam. Presuming phase-locked harmonics, our results predict unprecedented levels of average power for a single attosecond pulse in the generated pulse train. Results of PIC simulations raise the prospect of attaining efficiencies of a few percent at higher laser intensities.

Divergence (linguistics)

Harmonic

Attosecond

10.1007/s00340-014-5968-x

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Citations (23)

[Data on tuberculin-desensitization mechanism].

PubMed (1956)

I Földeş E Komlós

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Citations (0)

Comparative study of morphological methods used for the determination of calcium salts.

PubMed (1970)

I Földeş László Módis Mihály Petkó M. Gyurkó A.J. Jozsa

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Citations (4)

Effect of experimental patellar luxation on the knee joint in the rat.

PubMed (1983)

Imre Kiss I Földeş

In 16 male Wistar albino rats the patella was fixed to the lateral aspect of the lateral condylus of the femur. Animals with luxated knee joint and controls were sacrificed 7-9 months after surgery. Operated knee joints were processed for histology and subjected to morphometric analysis in comparison to the controls.- It was found that (1) the artificial disturbance of the femoro-patellar junction resulted in a severe destruction of articular cartilages of the tibio-femoral and femoro-patellar junction; (2) the destructions progressed with time; (3) there was no substantial difference between the changes of the medial and lateral articular surfaces of the femur and tibia; (4) changes comprised focal cartilage necrosis, widening of cartilaginous area under the tide-mark, proliferation of subchondral bone and formation of osteophytes; (5) the fact that a change of the statics of femoro-patellar junction leads to panarthrosis, moreover that articular capsule, menisci, epi-, meta-, and diaphyseal bone areas are also involved, indicate the complexity of the question. The findings indicated that changes of the femoro-patellar junction play a role in the degenerative processes of the knee joint. It is concluded that early recognition and treatment of femoro-patellar alterations may help in the prevention of knee panarthrosis.

Patellar ligament

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Citations (3)

Multicolor single-analyzer high-energy-resolution XES spectrometer for simultaneous examination of different elements

Journal of Synchrotron Radiation (2022)

Antal Mikeházi Jihad El Guettioui I Földeş György Vankó Zoltán Németh

The present work demonstrates the performance of a von Hámos high-energy-resolution X-ray spectrometer based on a non-conventional conical Si single-crystal analyzer. The analyzer is tested with different primary and secondary X-ray sources as well as a hard X-ray sensitive CCD camera. The spectrometer setup is also characterized with ray-tracing simulations. Both experimental and simulated results affirm that the conical spectrometer can efficiently detect and resolve the two pairs of two elements (Ni and Cu) Kα X-ray emission spectroscopy (XES) peaks simultaneously, requiring a less than 2 cm-wide array on a single position-sensitive detector. The possible applications of this simple yet broad-energy-spectrum crystal spectrometer range from quickly adapting it as another probe for complex experiments at synchrotron beamlines to analyzing X-ray emission from plasma generated by ultrashort laser pulses at modern laser facilities.

X-Ray Spectroscopy

10.1107/s1600577522007561

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Changes of lumbar vertebrae after Cosmos-1887 space flight.

PubMed (1991)

I Földeş T Szilágyi M Rapcsák Velkey Oganov Vs

Cosmos (plant)

Weightlessness

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Citations (3)