No abstract available

No abstract available

[en] The aim of the research project was first to select a fungus with a high potential for mineralization of polycyclic aromatic hydrocarbons (PAH) and a good ability to colonize different soils. The application of this fungus for a degradation of PAH in soil had to be tested. In a screening of 57 white rot fungi the fungus Pleurotus sp. Florida fulfilled these requirements best. In pure culture it was able to metabolize and mineralize highly condensed 4-6 ring PAH to a great extent. For instance, up to 50% of ¹⁴C-pyrene or 39% of ¹⁴C-benzo(a)pyrene was mineralized to ¹⁴CO₂ within 15 weeks. If different carriers for ¹⁴C-pyrene were used the mineralization correlated with the bioavailability, which was characterized by the desorption of the compound from the carriers with water. The mineralization of ¹⁴C-pyrene, ¹⁴C-benz(a)anthracene; ¹⁴C-benzo(a)-pyrene and ¹⁴C-dibenz(a, h)anthracene in native soils showed that a colonization with Pl. sp Florida inhibited the degradation of the less recalcitrant ¹⁴C-pyrene by the indigenous soil microflora. However, the mineralization of the carcinogenic, very recalcitrant and high condensed ¹⁴C-PAH was considerably supported by the fungus. Therefore this capabilities of the fungus could not be proven in a joint medium-scale soil experiment (0.8 m³ soil) which had been conducted within a parmership with scientists in Jena and an industriell firm. Because of safety aspects only the low condensed less recalcitrant PAH could be applied in this experiment. (orig./MG)

No abstract available

[en] In this article, a review of multivariate methods based on statistical learning is given. Several popular multivariate methods useful in high-energy physics analysis are discussed. Selected examples from current research in particle physics are discussed, both from online trigger selection and from off-line analysis. In addition, statistical learning methods, not yet applied in particle physics, are presented and some new applications are suggested.

No abstract available

[en] A review of multivariate methods based on statistical training is given. Several multivariate methods useful in high-energy physics analysis are discussed. Selected examples from current research in particle physics are discussed, both from the on-line trigger selection and from the off-line analysis. Also statistical training methods are presented and some new application are suggested

[en] During the run period (1992-1995) CDF experiment has collected 110 pb^-1 of p(anti)p collisions at 1.8 TeV center of mass energy. The high-lights of the CDF B physics results are described, among them the most important are the measurement of B hadron masses, lifetimes and mixing as well as the observation of the B_c meson and the measurement of the CP violation parameter sin 2β. Run IIa will give a unique opportunity of extended B physics studies due to the high luminosity of 2fb^-1 of p(anti)p collisions and the major upgrades of both Tevatron experiments, CDF and D0. The perspectives for the B measurements, specially the studies od heavier B hadrons are described, together with the Run I highlights. (author)

[en] Experimental studies have confirmed the computational estimation of the regeneration of spent decontamination solutions by ion exchange. Using cation exchange resins, the regeneration has been successful for solutions containing citric acid, oxalic acid and nitrilotriacetic acid as decontaminating agents, whereas ethylene-diamine-tetraacetic acid could not be regenerated. (author)

[en] Tau leptons provide a useful signature in searches for new physics phenomena in the ATLAS experiment, like Higgs bosons or supersymmetry. The Standard Model processes with tau leptons are important backgrounds in such searches and also can be used to calibrate the detector and demonstrate the performance of tau identification. The data collected at centre-of-mass energy of √s = 7 TeV with the ATLAS detector are used to study the reconstruction and identification algorithms for hadronic tau decays. Their performance in data and Monte Carlo simulations is compared in dijet sample and good agreement is observed. The first observation of W → τν decays in ATLAS is also presented. The observed yield over the total background is compatible with Standard Model signal expectation. (author)