Radiative capture on neutron rich nuclei

The $({\rm n},\gamma)$--cross sections for neutron--rich oxygen isotopes have been calculated in the direct capture model. The experimental data for ${^{18}{\rm O}}({\rm n},\gamma){^{19}{\rm O}}$ can be reproduced using this model. Compared to previous work the cross section for ${^{19-21}{\rm O}}({\rm n},\gamma){^{20-22}{\rm O}}$ are enhanced considerably by factors between four and 300.Comment: 5 pages + 1 figure (availbale on request), LaTex, IK-TUW-Preprint 940640

MONITORING THE FOOTBALL PLAYER’S RUNNING SPEED IN THE U7 RANGE IN RESPECT WITH BALL AND WITHOUT BALL

The purpose of the study is to prove that, the ball exercises and the playful form of practice are more effective, than the “less ball exercises” practical training. The two participant groups in the measurement were Gyáli –BKSE U7 and Vecsési FC U7. The monitoring has been made with testing method technique (N=40). We used the slalom sprint and the slalom dribble. To determinate the difference we used the 2-sample t-test. The group of Gyál had a better result in slalom sprint. At the assessment in November, the improvement (0.39 second) was outstanding too and the in following months the improvement’s rate showed almost the same tendency. The group’s average improvement (0.96 second) progressed. At slalom dribble, the improvement of the group of Vecsés was continuous. The group’s average improvement was 5.03 second. The group of Gyál’s improvement was continuous as well but its rate is 3.22 seconds. The rate of improvement did not show any significant difference. Therefore, I cannot claim that this method causes much the largest improvement comparing to the traditional method. At both of the groups, the improvement is clearly demonstrable. Despite that the significant improvement is not demonstrable I am going to practise these playful exercises and recommend to my colleagues who work with this generation. Because with this exercises the trainings are more playful and vivid

Identification of human pathogens isolated from blood using microarray hybridisation and signal pattern recognition

<p>Abstract</p> <p>Background</p> <p>Pathogen identification in clinical routine is based on the cultivation of microbes with subsequent morphological and physiological characterisation lasting at least 24 hours. However, early and accurate identification is a crucial requisite for fast and optimally targeted antimicrobial treatment. Molecular biology based techniques allow fast identification, however discrimination of very closely related species remains still difficult.</p> <p>Results</p> <p>A molecular approach is presented for the rapid identification of pathogens combining PCR amplification with microarray detection. The DNA chip comprises oligonucleotide capture probes for 25 different pathogens including Gram positive cocci, the most frequently encountered genera of <it>Enterobacteriaceae</it>, non-fermenter and clinical relevant <it>Candida </it>species. The observed detection limits varied from 10 cells (e.g. <it>E. coli</it>) to 10⁵cells (<it>S. aureus</it>) per mL artificially spiked blood. Thus the current low sensitivity for some species still represents a barrier for clinical application. Successful discrimination of closely related species was achieved by a signal pattern recognition approach based on the k-nearest-neighbour method. A prototype software providing this statistical evaluation was developed, allowing correct identification in 100 % of the cases at the genus and in 96.7 % at the species level (n = 241).</p> <p>Conclusion</p> <p>The newly developed molecular assay can be carried out within 6 hours in a research laboratory from pathogen isolation to species identification. From our results we conclude that DNA microarrays can be a useful tool for rapid identification of closely related pathogens particularly when the protocols are adapted to the special clinical scenarios.</p

Proof for trivalent Sc ions in Sc2@C84 from high-energy spectroscopy

The electronic structure and the valency of the Sc ions in the endohedral dimetallofullerene Sc 2 @C 84 with D 2d symmetry are probed using high-energy spectroscopy. Comparison of the Sc 2p ! 3d x-ray-absorption spectrum with calculated ionic multiplet spectra shows that the Sc ions are trivalent. Detailed multiplet calcu-lations including covalency indicate that the effective valency of the Sc~III! ions can be described by a formal charge transfer to the fullerene cage of 2.660.1. This illustrates that a purely ionic picture is not valid for the electronic structure of Sc 2 @C 84 , and that a more complex picture including finite hybridization between the Sc and the fullerene cage has to be applied

Effect of Process Parameters and High-Temperature Preheating on Residual Stress and Relative Density of Ti6Al4V Processed by Selective Laser Melting

The aim of this study is to observe the effect of process parameters on residual stresses and relative density of Ti6Al4V samples produced by Selective Laser Melting. The investigated parameters were hatch laser power, hatch laser velocity, border laser velocity, high-temperature preheating and time delay. Residual stresses were evaluated by the bridge curvature method and relative density by the optical method. The effect of the observed process parameters was estimated by the design of experiment and surface response methods. It was found that for an effective residual stress reduction, the high preheating temperature was the most significant parameter. High preheating temperature also increased the relative density but caused changes in the chemical composition of Ti6Al4V unmelted powder. Chemical analysis proved that after one build job with high preheating temperature, oxygen and hydrogen content exceeded the ASTM B348 limits for Grade 5 titanium

Integrating technologies for the sustainable control of gastrointestinal parasites in sheep : The Argentinean case

Gastrointestinal nematode infections in sheep are a major concern among breeders due to the economic losses they cause in terms of a reduction in both productivity and viability of animals. The situation worsens in face of the emergence of anthelmintic-resistant parasites. In this context, breeding and management practices aimed at an integrated control of parasites, such as raising parasiteresistant sheep, are required. This study focused on the genetic variation underlying parasite resistance in sheep, for potential use in breeding programmes. An artificial challenge with infectious H. contortus L3 was carried out in the northeast region of Argentina for more than 10 years in 1 072 Corriedale lambs with an average age of 5.6 months. Body weight, faecal egg count, packed cell volume, and FAMACHA© score were recorded at different time points post-challenge and their heritability and phenotypic and genetic correlations were estimated. Animals were genotyped on 173 single nucleotide polymorphisms belonging to 77 candidate genes for immune response. The results indicate that there is sufficient genetic variability for the four traits studied, which presented moderate heritabilities (in the range 0.29 to 0.44) and increased along the challenge period, with the exception of the hematocrit, which decreased. Association analyses identified seven markers associated with estimated breeding values for faecal egg count, located in genes involved in different stages of the pathogen-host interaction process. The information obtained supports the potential of markerassisted breeding schemes to enable profitable and sustainable sheep production.Instituto de GenéticaFil: Poli, Mario Andres. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Genética; ArgentinaFil: Poli, Mario Andres. Universidad del Salvador. Facultad de Ciencias Agrarias y Veterinaria; ArgentinaFil: Caffaro, Marí­a Eugenia. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Genética; ArgentinaFil: Cetra, Bibiana Maria. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Mercedes; ArgentinaFil: Raschia, Maria Agustina. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Genética; ArgentinaFil: Medus, Pablo Daniel. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Concepción del Uruguay; ArgentinaFil: Maizon, Daniel Omar. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Anguil; ArgentinaFil: Garcia Podesta, Mario. Joint FAO/IAEA Division of Nuclear Techniques in Food and Agriculture, International Atomic Energy Agency. Animal Production and Health Laboratory; AustriaFil: Donzelli, María Valeria. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Genética; ArgentinaFil: Bonelli, Rita. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Concepción del Uruguay; ArgentinaFil: Periasamy, Kathiravan. Joint FAO/IAEA Division of Nuclear Techniques in Food and Agriculture, International Atomic Energy Agency. Animal Production and Health Laboratory; Austri