Esperienze di utilizzo del MCRS per una vinificazione di qualità

12openNationalItalian coauthor/editorLo studio si è focalizzato su 14 prove di cantina, volte a valutare il ruolo degli zuccheri utilizzati in presa di spuma sia con il metodo classico che con il metodo Charmat (Martinotti). Le prove hanno utilizzato zucchero di canna, di barbabietola e mosto concentrato rettificato solido (MCRS) o liquido (MCR)openCotarella, R.; Chiasso, P.P.; Biasi, N.; Carlin, S.; Angeli, A.; Guzzon, R.; Groff, L.; Panichi, A.; Vrhovsek, U.; Cambrea, M.; Vallini, V.; Mattivi, F.Cotarella, R.; Chiasso, P.P.; Biasi, N.; Carlin, S.; Angeli, A.; Guzzon, R.; Groff, L.; Panichi, A.; Vrhovsek, U.; Cambrea, M.; Vallini, V.; Mattivi, F

Antenna Impedance in a Warm Plasma

Impedance of biconical and cylindrical dipoles in warm isotropic plasm

Isolated tau leptons in events with large missing transverse momentum at HERA

A search for events containing isolated tau leptons and large missing transverse momentum, not originating from the tau decay, has been performed with the ZEUS detector at the electron-proton collider HERA, using 130 pb^-1 of integrated luminosity. A search was made for isolated tracks coming from hadronic tau decays. Observables based on the internal jet structure were exploited to discriminate between tau decays and quark- or gluon-induced jets. Three tau candidates were found, while 0.40 +0.12 -0.13 were expected from Standard Model processes, such as charged current deep inelastic scattering and single W-boson production. To search for heavy-particle decays, a more restrictive selection was applied to isolate tau leptons produced together with a hadronic final state with high transverse momentum. Two candidate events survive, while 0.20 +-0.05 events are expected from Standard Model processes.Comment: 28 pages, 4 figures, 3 tables, accepted by Phys. Lett. B. Updated with minor changes to the text requested by the journal refere

Establishing an GC-MS based metabolomics platform

9openMetabolomics has become a powerful tool to study processes in organisms and to identify biomarkers. In recent years, within the Research and Innovation Centre (CRI) at Edmund Mach Foundation (FEM) a mass spectrometry (MS) based technological platform for high throughput metabolomics has been set up, with the objective of analysing different sample types (including plant tissue like fruits, leaves, roots but also urine, faeces, liver, kidney samples). For analysis of volatiles we use a gas chromatography (GC)-MS system with an autosampler solid phase microextraction (SPME) device. Optimisation of SPME parameters is crucial to detect as many metabolites as possible and these parameters are sample dependent. Hence, we established an SPME parameter optimisation method based on an D-optimal design. This requires only a rather low amount of injections to identify SPME conditions providing the highest number of peaks. The input to the D-optimal design is provided by an automated and unbiased peak picking process using the xcms [1] R package. Within the data analysis pipeline, feature annotation and substance identification is performed by combining xcms with in-house developed software solutions, which rely on commercial and in-house mass spectra libraries. Quality control is of high importance for all the high-throughput metabolomic applications. With our workflow, it is ensured by the regular injection and analysis of specific quality control (QC) samples. This presentation shows the platform setup and its application to grape samples.openWeingart, G.; Fedrizzi, B.; Carlin, S.; Ghaste, M.; Vrhovsek, U.; Franceschi, P.; Scholz, M.; Wehrens, R.; Mattivi, F.Weingart, G.; Fedrizzi, B.; Carlin, S.; Ghaste, M.S.; Vrhovsek, U.; Franceschi, P.; Scholz, M.U.; Wehrens, H.R.M.J.; Mattivi, F

Observation of Scaling Violations in Scaled Momentum Distributions at HERA

Charged particle production has been measured in deep inelastic scattering (DIS) events over a large range of $x$ and $Q^2$ using the ZEUS detector. The evolution of the scaled momentum, $x_p$, with $Q^2,$ in the range 10 to 1280 $GeV^2$, has been investigated in the current fragmentation region of the Breit frame. The results show clear evidence, in a single experiment, for scaling violations in scaled momenta as a function of $Q^2$.Comment: 21 pages including 4 figures, to be published in Physics Letters B. Two references adde

Arkansas Soybean Performance Tests 2018

Soybean variety and strain performance tests are conducted each year in Arkansas by the University of Arkansas System Division of Agriculture’s Arkansas Crop Variety Improvement Program. The tests provide information to companies developing varieties and/or marketing seed within the State, and aid the Arkansas Cooperative Extension Service in formulating variety recommendations for soybean producers

Fixing the Reference Frame for PPMXL Proper Motions Using Extragalactic Sources

We quantify and correct systematic errors in PPMXL proper motions using extragalactic sources from the first two LAMOST data releases and the Veron-Cetty & Veron Catalog of Quasars. Although the majority of the sources are from the Veron catalog, LAMOST makes important contributions in regions that are not well-sampled by previous catalogs, particularly at low Galactic latitudes and in the south Galactic cap. We show that quasars in PPMXL have measureable and significant proper motions, which reflect the systematic zero-point offsets present in the catalog. We confirm the global proper motion shifts seen by Wu, Ma, & Zhou (2011), and additionally find smaller-scale fluctuations of the QSO-derived corrections to an absolute frame. We average the proper motions of 158,106 extragalactic objects in bins of 3x3 degrees and present a table of proper motion corrections.Comment: Accepted for publication in RAA; 12 pages, 6 figures (Fig. 1 at reduced resolution); full table of corrections available in online journal, with arxiv ancillary files (as ASCII table), or by reques