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Momberger K, Grun N, Scheid W, Becker U, Soff G. Muon pair production with inner-shell capture in relativistic U92+-U92+collisions. ACTA ACUST UNITED AC 1999. [DOI: 10.1088/0022-3700/20/9/003] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Terlecki G, Grun N, Scheid W. Trajectory method for the solution of the time-dependent Schrodinger equation in atomic physics and application to H+-H scattering. ACTA ACUST UNITED AC 1999. [DOI: 10.1088/0022-3700/17/18/011] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Eichenauer D, Grun N, Scheid W. Classical-trajectory calculations of the differential cross section for charge transfer in H+-H collisions. ACTA ACUST UNITED AC 1999. [DOI: 10.1088/0022-3700/15/1/004] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Gramlich K, Grun N, Scheid W. The time-dependent Hartree-Fock method within a Gauss-lobe basis and application to proton-He collisions. ACTA ACUST UNITED AC 1999. [DOI: 10.1088/0022-3700/19/10/015] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Förster W, Scheid W, Weber J, Schürenberg M, Traut H, Busse H. Fluence and mutagenic side effects of excimer laser radiation applied in ophthalmology in human lymphocytes in vitro. ACTA OPHTHALMOLOGICA SCANDINAVICA 1997; 75:124-7. [PMID: 9197554 DOI: 10.1111/j.1600-0420.1997.tb00105.x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
PURPOSE To investigate the influence of different fluences in 193 and 248 nm excimer laser radiation on the yields of chromatid and chromosome aberrations induced in human lymphocytes in vitro. METHOD Heparinized human blood was exposed to 193 or 248 nm excimer laser radiation. The fluence was gradually increased from 21 to 400 mJ/cm2 in 193 nm (constant total energy of 250 J) and from 150 to 377 mJ/cm2 in 248 nm radiation (constant total energy of 500 J). Chromatid and chromosome aberrations were then analysed microscopically. RESULTS The yields of chromatid breaks and achromatic lesions depend on the fluence per pulse. This dependence contains a linear component, indicating a threshold of about 70 mJ/cm2 fluence in 193 nm and of about 250 mJ/cm2 fluence in 248 nm laser radiation. An increase of the yield of dicentric chromosomes could only be observed at the highest fluence tested (377 mJ/cm2) in the 248 nm series. Over 126 mJ/cm2 in 193 nm radiation no lymphocytes could be cultured and therefore no aberrations could be found. CONCLUSIONS Our findings show that the fluence of 193 nm and of 248 nm excimer laser radiation has an effect on the yields of chromatid breaks and achromatic lesions in human lymphocytes under in vitro conditions.
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Eberspächer M, Apagyi B, Scheid W. Solution of a Coupled Channel Inverse Scattering Problem at Fixed Energy by a Modified Newton-Sabatier Method. PHYSICAL REVIEW LETTERS 1996; 77:1921-1924. [PMID: 10061813 DOI: 10.1103/physrevlett.77.1921] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Stefanescu E, Scheid W, Sandulescu A, Greiner W. Cold fission as cluster decay with dissipation. PHYSICAL REVIEW. C, NUCLEAR PHYSICS 1996; 53:3014-3021. [PMID: 9971289 DOI: 10.1103/physrevc.53.3014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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Schmidt J, Scheid W. Molecular states in the equator-equator orientation of two oblately deformed 12C nuclei. PHYSICAL REVIEW. C, NUCLEAR PHYSICS 1996; 53:322-333. [PMID: 9970942 DOI: 10.1103/physrevc.53.322] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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Gupta RK, Singh S, Münzenberg G, Scheid W. Neutron-halo nuclei in cold synthesis and cluster decay of heavy nuclei: Z=104 nucleus as an example. PHYSICAL REVIEW. C, NUCLEAR PHYSICS 1995; 51:2623-2629. [PMID: 9970347 DOI: 10.1103/physrevc.51.2623] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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Silisteanu I, Scheid W. Half-lives of cluster radioactivity within a model including superfluid phenomena and resonance effects. PHYSICAL REVIEW. C, NUCLEAR PHYSICS 1995; 51:2023-2030. [PMID: 9970271 DOI: 10.1103/physrevc.51.2023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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Weber J, Scheid W, Traut H. Biological dosimetry after extensive diagnostic x-ray exposure. HEALTH PHYSICS 1995; 68:266-269. [PMID: 7814260 DOI: 10.1097/00004032-199502000-00012] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
The yield of chromosome aberrations (dicentric and ring chromosomes) was determined for five patients who had been extensively exposed to diagnostic x rays. Remarkably high aberration yields were obtained for each of them leading to correspondingly high equivalent whole body doses ("biological dosimetry"). The contribution of iodized contrast media and computing tomography to the biologically estimated doses is discussed.
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Antonenko NV, Ivanova SP, Jolos RV, Scheid W. Light nuclei production in fusion of heavy ions. PHYSICAL REVIEW. C, NUCLEAR PHYSICS 1994; 50:2063-2068. [PMID: 9969883 DOI: 10.1103/physrevc.50.2063] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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Heumann D, Greiner M, Scheid W, Braunss G. Spin-dependent generalized collective model in relation to the j=3/2 interacting boson fermion model. PHYSICAL REVIEW. C, NUCLEAR PHYSICS 1994; 50:812-817. [PMID: 9969723 DOI: 10.1103/physrevc.50.812] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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Apagyi B, Schmidt A, Scheid W, Voit H. 12C+12C elastic scattering potentials obtained by unifying phase-shift analysis with the modified Newton-Sabatier inverse method. PHYSICAL REVIEW. C, NUCLEAR PHYSICS 1994; 49:2608-2617. [PMID: 9969510 DOI: 10.1103/physrevc.49.2608] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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Scheid W, Weber J, Traut H, Gabriel HW. Chromosome aberrations induced in the lymphocytes of pilots and stewardesses. THE SCIENCE OF NATURE - NATURWISSENSCHAFTEN 1993; 80:528-30. [PMID: 8264808 DOI: 10.1007/bf01140813] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
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Cseh J, Lévai G, Scheid W. Algebraic 12C+12C cluster model of the 24Mg nucleus. PHYSICAL REVIEW. C, NUCLEAR PHYSICS 1993; 48:1724-1738. [PMID: 9969016 DOI: 10.1103/physrevc.48.1724] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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Scheid W, Weber J, Petrenko S, Traut H. Chromosome aberrations in human lymphocytes apparently induced by Chernobyl fallout. HEALTH PHYSICS 1993; 64:531-534. [PMID: 8491604 DOI: 10.1097/00004032-199305000-00011] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Sixteen people (15 from Byelorussia, one from Kiev) possibly exposed to radioactivity released by the Chernobyl accident were investigated for chromosome aberrations induced in lymphocytes. Statistically significant increases of the yield of dicentric chromosomes were observed in five people.
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Gupta RK, Singh S, Puri RK, Scheid W. Instabilities against exotic cluster decays in "stable" nuclei with Z and N in the neighborhood of spherical and deformed closed shells. PHYSICAL REVIEW. C, NUCLEAR PHYSICS 1993; 47:561-566. [PMID: 9968472 DOI: 10.1103/physrevc.47.561] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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Spies W, Müller A, Linkemann J, Frank A, Wagner M, Kozhuharov C, Franzke B, Beckert K, Bosch F, Eickhoff H, Jung M, Klepper O, König W, Mokler PH, Moshammer R, Nolden F, Schaaf U, Spädtke P, Steck M, Zimmerer P, Grün N, Scheid W, Pindzola MS, Badnell NR. Dielectronic and radiative recombination of lithiumlike gold. PHYSICAL REVIEW LETTERS 1992; 69:2768-2771. [PMID: 10046584 DOI: 10.1103/physrevlett.69.2768] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Thiel J, Bunker A, Momberger K, Grün N, Scheid W. Electron-positron pair creation with capture and ionization in relativistic heavy-ion collisions by the finite-difference method. PHYSICAL REVIEW. A, ATOMIC, MOLECULAR, AND OPTICAL PHYSICS 1992; 46:2607-2612. [PMID: 9908419 DOI: 10.1103/physreva.46.2607] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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Lévai G, Cseh J, Scheid W. Semimicroscopic algebraic study of the alpha -cluster states of the 18O nucleus. PHYSICAL REVIEW. C, NUCLEAR PHYSICS 1992; 46:548-557. [PMID: 9968149 DOI: 10.1103/physrevc.46.548] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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Weber J, Scheid W, Traut H. Time-saving in biological dosimetry by using the automatic metaphase finder Metafer2. Mutat Res 1992; 272:31-4. [PMID: 1380117 DOI: 10.1016/0165-1161(92)90006-8] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
The amount of time-saving by using the Metafer2 metaphase finder for routine analysis of radiation-induced chromosome aberrations (biological dosimetry) was determined. Metaphases were prepared by standard methods from cultures of human peripheral blood lymphocytes and stained either with Giemsa or with the FPG method. The metaphase finder was used for detecting metaphases on the microscope slides and for automatically processing the evaluation data. In our laboratory, standardized analysis of 1000 metaphases requires at least 3 working days for cell culturing and slide preparation and 51.5 working hours for cytogenetic analysis. When using the metaphase finder the time required for cytogenetic analysis is reduced to 17.3 working hours (time-saving factor: 51.5/17.3 h = 3.0). In our prolonged method, including more than one scoring of each slide and karyotyping of metaphases with chromosome aberrations, the analysis times for 1000 cells are 132 and 70 working hours, respectively (time saving factor: 132/70 h = 1.9).
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Traut H, Scheid W. Significance testing in mutagen screening: the dependence of statistical power on the control sample size. Mutat Res 1992; 272:73-7. [PMID: 1380120 DOI: 10.1016/0165-1161(92)90009-b] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
The continuous accumulation of control data in multicellular mutagen screening systems prompted us to study the dependence of the statistical power on the size of the control sample (for fixed control values). Two widely used screening systems were chosen: dicentric chromosomes in human lymphocytes and recessive sex-linked lethals in Drosophila melanogaster. The power increases rapidly at first as the control sample size increases, then levels off at a few tens of thousands of control units tested and thereafter remains almost constant up to the historical control. The practical implications from our study are discussed.
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Häuser T, Scheid W, Hora H. Theory of ions emitted from a plasma by relativistic self-focusing of laser beams. PHYSICAL REVIEW. A, ATOMIC, MOLECULAR, AND OPTICAL PHYSICS 1992; 45:1278-1281. [PMID: 9907099 DOI: 10.1103/physreva.45.1278] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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