排序方式: 共有31条查询结果,搜索用时 31 毫秒
1.
H. Fawcett S. Barlag H. Becker E. Belau T. Böhringer M. Bosman V. Castillo V. Chabaud D. Bucholz C. Damerell C. Daum G. De Rijk H. Dietl S. Gill A. Gillman R. Gilmore T. Gooch P. Gras Z. Hajduk E. Higon B. Hyams D. Kelsey J. Kemmer R. Klanner U. Kötz S. Kwan B. Lücking G. Lütjens G. Lutz J. Malos W. Männer E. Neugebauer H. Palka M. Pepé G. Polok J. Richardson M. Rozanska K. Rybicki H. Seebrunner U. Stierlin R. Tapper H. Tiecke M. Turala G. Waltermann S. Watts P. Weilhammer F. Wickens L. Wiggers A. Wylie T. Zeludziewicz ACCMOR Collaboration 《Zeitschrift fur Physik C Particles and Fields》1990,46(4):513-519
The production of the neutralK ? (892) resonances by 200 GeVK ? andπ ? has been studied over the kinematic range 0.0<x f<1.0 andp t 2 <5.0 GeV2. Longitudinal and transverse momentum distributions are presented. In addition the decay angular distributions inK ? fragmentation to \(\bar K^{0*} \) have been investigated. 相似文献
2.
H. Dijkstra R. Bailey E. Belau T. Böhringer M. Bosman V. Chabaud C. Damerell C. Daum G. de Rijk S. Gill A. Gillman R. Gilmore Z. Hajduk C. Hardwick W. Hoogland B. D. Hyams R. Klanner S. Kwan U. Kötz G. Lütjens G. Lutz J. Malos W. Männer E. Neugebauer H. Palka M. Pepé J. Richardson K. Rybicki H. J. Seebrunner U. Stierlin R. J. Tapper H. G. Tiecke M. Turala G. Waltermann S. Watts P. Weilhammer F. Wickens L. W. Wiggers A. Wylie T. Zeludziewicz ACCMOR Collaboration 《Zeitschrift fur Physik C Particles and Fields》1986,32(3):353-358
The joint production of ? mesons andπ ±,π 0,p, \(\bar p\) ,K s 0 andK ± is investigated using a sample of 600,000 inclusive ? meson events obtained in hadron Be interactions with incidentπ ±,p, \(\bar p\) andK ± beams. Evidence is presented for the joint production of ? mesons and strange particles produced with non-strange incident beams. With incidentK ± beam the number of additional strange particles is suppressed. The results are found to be in agreement with the qualitative predictions of a parton fusion model. The comparison with the Lund model for lowp T processes is fair. 相似文献
3.
Marina Lulla Jelena Asari Jaan Aarik Kaupo Kukli Raul Rammula Unto Tapper Eero Kauppinen Väino Sammelselg 《Mikrochimica acta》2006,155(1-2):195-198
Quantitative electron probe microanalysis of highly insulating materials is a complicated problem, partially solved by coating
samples with grounded thin conductive layers or using novel scanning electron microscopy (SEM) techniques, such as low-voltage
and/or variable pressure SEM. In this work, some problems of quantitative X-ray microanalysis of thin HfO2 films, in particular the possibility to determine mass thickness correlated to the density of the layer material, are discussed.
For comparison, Al2O3, Ta2O5 and TiO2 films grown onto both semiconductive Si and insulating quartz substrates were also analysed. All the films studied were synthesized
by atomic layer deposition method. 相似文献
4.
5.
An immobilized microbial heparinase for blood deheparinization 总被引:6,自引:0,他引:6
R. J. Linhardt C. L. Cooney D. Tapper C. A. Zannetos A. K. Larsen R. Langer 《Applied biochemistry and biotechnology》1984,9(1):41-55
A new medical application of an immobilized microbial enzyme is described. Extracorporeal devices require systemic heparin
administration to prevent thrombus formation; however, the use of heparin often leads to serious hemorrhagic complica tions.
Heparinase isolated from Flavobacterium has been immobilized and used in a fluidized bed reactor to eliminate heparin from
blood passing through an extracorporeal circuit both in vitro and in vivo. This paper discusses the stepwise de velopment
of this heparinase reactor including: (1) improvements in the fermentation resulting in an inexpensive large-scale source
of heparinase without the addition of the previously required inducer, heparin; (2) the use of batch processes to adapt previous
purification schemes to large-scale heparinase production and the subsequent purifica tion of heparinase to a single SDS-PAGE
banding protein; (3) the immobilization of heparinase with a 91% activity recovery and good stability, (4) the design and
suc cessful testing of a fluidized bed reactor containing immobilized heparinase in the re moval of clinically used quantities
of heparin from both human blood in vitro and ca nine blood in vivo; and (5) the initiation of animal studies focusing on
the toxicology of heparinase-derived heparin degradation products and the short and long term effects of exposure to these
products and to heparinase. 相似文献
6.
R. Bailey E. R. Belau T. Böhringer M. Bosman V. Chabaud C. Damerell C. Daum H. Dijkstra S. Gill A. Gillman R. S. Gilmore Z. Hajduk C. Hardwick W. Hoogland B. D. Hyams J. Kemmer R. Klanner U. Kötz S. W. L. Kwan G. Lütjens G. Lutz J. Malos W. Männer E. Neugebauer H. Paŀka M. Pepe J. Richardson G. de Rijk M. Rozanska K. Rybicki H. Seebrunner U. Stierlin R. J. Tapper H. G. Tiecke M. Turala G. Waltermann P. Weilhammer F. Wickens L. W. Wiggers A. Wylie T. Zeludziewicz ACCMOR-Collaboration 《Zeitschrift fur Physik C Particles and Fields》1986,30(1):51-63
We have measured the differential and total cross sections ofD meson production in 200 GeV π?-beryllium interactions, using a sample of 48 fully reconstructed and nearly background-freeD mesons in the decay channelsK ?π±,K ?π±π± andK ?π?π±π±. A single electron trigger has been used to select events containing a pair of charmed particles. A vertex telescope of 6 silison microstrip detectors allowed the reconstruction of tracks of charged secondaries and the reconstruction of primary and decay vertices with high precision. The ratio of branching fractions for \(\mathop {D^0 }\limits^{( - )} \to K^ \mp \pi ^ \pm \) to \(\mathop {D^0 }\limits^{( - )} \to K^ \mp \pi ^ \mp \pi ^ \pm \pi ^ \pm \) , and an upper limit for \(D^0 - \bar D^0 \) mixing are presented. 相似文献
7.
R. Bailey G. Blanar M. Bosman V. Chabaud C. Damerell C. Daum G. De Rijk H. Dietl H. Dijkstra A. Dwuraźny A. Gillman R. Gilmore L. Görlich Z. Hajduk C. Hardwick W. Hoogland B. Hyams M. Jeżabek R. Klanner E. Lorenz G. Lütjens G. Lutz J. Malos W. Männer G. Polok M. Różańska K. Rybicki H. J. Seebrunner W. Spierenburg U. Stierlin R. J. Tapper H. G. Tiecke M. Turala J. Vermeulen G. Waltermann P. Weilhammer F. Wickens L. W. Wiggers A. Wylie T. Żeludziewicz 《Zeitschrift fur Physik C Particles and Fields》1985,29(1):1-8
8.
R. Bailey E. Belau T. Böhringer M. Bosman V. Chabaud C. Damerell C. Daum G. de Rijk H. Dijkstra S. Gill A. Gillman R. Gilmore Z. Hajduk C. Hardwick W. Hoogland B. Hyams R. Klanner U. Koetz G. Lütjens G. Lutz J. Malos W. Männer E. Neugebauer M. Rozanska K. Rybicki H. Seebrunner U. Stierlin R. Tapper H. Tiecke M. Turala G. Waltermann S. Watts P. Weilhammer F. Wickens L. Wiggers A. Wylie T. Zeludziewicz 《Zeitschrift fur Physik C Particles and Fields》1984,22(2):125-129
TheA-dependence of the inclusive ? meson cross-section is measured using two target materials, beryllium and tantalum, in the kinematic range 0F<0.3 andp T 2 <1 GeV2. Parametrizing the cross-section with δ(A)=δ(A=1)A α, yields α=0.90 ±0.02 and α=0.86±0.02 for production of ?'s with 120 GeVπ + andp-beams respectively. 相似文献
9.
10.
Cobalt and nickel nanoparticles were produced by hydrogen reduction reaction from cobalt or nickel chloride precursor vapour
in nitrogen carrier gas. This aerosol phase method to produce nanoparticles is a scalable one-step process. Two different
setups were introduced in particle production: a batch type reactor and a continuously operated reactor. Common feature in
these setups was hydrogen mixing in a vertical flow reactor. The process was monitored on-line for particle mass concentration
and for gas phase chemical reactions. Tapered element oscillating microbalance measured the particle mass concentration and
Fourier transform infrared spectroscopy was used to monitor relevant gas phase species. The produced cobalt and nickel particles
were characterised using transmission electron microscopy and x-ray diffraction. The produced cobalt and nickel particles
were crystalline with cubic fcc structure. Twinning was often observed in cobalt particles while nickel particles were mostly
single crystals. The cobalt particles formed typically long agglomerates. No significant neck growth between the primary particles
was observed. The primary particle size for cobalt and nickel was below 100 nm. 相似文献