Etiological structure of bacteriosis of animals in the Dnipropetrovsk region for 2014–2016

Епізоотична ситуація щодо деяких інфекційних хвороб на Дніпропетровщині залишається складною і напруженою. Своєчасна й точна діагностика визначає ефективність реалізованих заходів профілактики інфекційних хвороб та встановлює особливості і зміни епізоотичної ситуації на певних територіях. Лабораторні дослідження, в тому числі бактеріологічний метод, мають вирішальне значення для правильної оцінки профілактичних і протиепізоотичних заходів. Метою нашої роботи було визначити за результатами бактеріологічних досліджень етіологічну структуру інфекційних хвороб у Дніпропетровській області за 2014–2016 роки. Матеріалом для досліджень були дані ветеринарної звітності державних районних лабораторій ветеринарної медицини Дніпропетровської області та результати власних досліджень, проведені на базі Дніпропетровської регіональної державної лабораторії ветеринарної медицини (ДРДЛВМ). Станом на 2014 рік у Дніпропетровській області поголів’я тварин по всіх категоріях господарств становило: великої рогатої худоби – 130527, дрібної рогатої худоби – 44739, свиней – 520801, коней – 1781, птахів – 15342087, у тому числі курей – 14816157, водоплавної – 525930. Упродовж 2014–2016 рр. лабораторіями ветеринарної медицини у Дніпропетровській області було проведено 18474 дослідження на інфекційні захворювання тварин. Всього було отримано 142 позитивні результати. За результатами бактеріологічних досліджень у Дніпропетровській області за 2014–2016 рр. було зареєстровано диплококоз, злоякісний набряк, пастерельоз, колібактеріоз, сальмонельоз, пулороз, стафілококоз, стрептококоз та бешиху свиней, псевдомоноз птиці, аеромоноз риб, парагнилець та протез бджіл. На колібактеріоз  проведено 4472 дослідження і одержано 78 позитивних результатів. Від свиней отримано 21 культуру, від птиці – 44 культури, від ембріонів – 6 культур, від дрібної рогатої худоби – 3 культури, від хутрових звірів – 2 культури, від собак – 2 культури. Культури Escherichia coli, виділені від свиней представлені серологічними варіантами: O139, O26, О9, О78, О1, О8 та нетипованими, а від птиці – O115, O119,О78, О15, О86, К88 АБ та нетипованими. На сальмонельоз проведено 7578 досліджень і отримано 16 позитивних результатів. Серед хвороб бджіл лабораторними дослідженнями було зареєстровано парагнилець та протеоз бджіл. Висновки: у Дніпропетровській області бактеріологічними дослідженнями виділено збудників 13 інфекційних хвороб тварин. Найчастіше виділялися збудники кишкових інфекцій (колібактеріозу та сальмонельозу).The epizootic situation with regard to some infectious diseases in the Dnipropetrovsk region remains as complicated and strained. Timely and accurate diagnosis determines the effectiveness of the realized preventive measures of infectious diseases and establishes the peculiarities and changes of the epizootic situation in certain areas. The laboratory examinations, including the bacteriological method, have the crucial importance for the correct assessment of prevention and antiepizootic measures. Objective of this review: was to determine the etiological structure of infectious diseases in the Dnipropetrovsk region for 2014–2016, based on the results of bacteriological examinations. As the material for the examinations were the data of the veterinary reports of the State district veterinary medicine laboratories of the Dnipropetrovsk region and the results of our own examinations conducted on the basis of the Dnipropetrovsk Regional State Laboratory of the Veterinary Medicine (DRSLVM). As of 2014 year, in the Dnipropetrovsk region, the live-stock capita in all categories of farms was: horned cattle – 130.527, small cattle – 44.739, pigs – 520.801, horses – 1,781, poultries – 15,342,087, including chickens – 14.816.157, waterfowl – 525.930. During 2014–2016 by means of laboratories of veterinary medicine in the Dnipropetrovsk region have been conducted 18,474 examinations on the infectious diseases of the animals. 142 positive results were received in total. According to the results of the bacteriological examinations in the Dnipropetrovsk region, for the years 2014–2016 were registered diplococcosis, malignant edema, pasteurellosis, colibacteriosis, salmonellosis, pullorosis, staphylococcosis, streptococcosis and swine erysipelas, poultry pseudomonosis, aeromonosis of fish, parafoul  brood (caused by Bacillus paraalvei) and proteose of bees. 4,472 examinations were conducted on colibacteriosis and 78 positive results were obtained. 21 cultures were obtained from the pigs, from poultries – 44 cultures, from embryos – 6 cultures, from small cattle – 3 cultures, from fur animals – 2 cultures, from dogs – 2 cultures. Cultures of Escherichia coli, isolated from pigs are represented by the serological variants: O139, O26, O9, O78, O1, O8 and atypical variants, and from poultries – O115, O119, O78, O15, O86, K88 AB and atypical variants. For salmonella, 7,578 examinations were conducted and 16 positive results were obtained. Among the diseases of bees, laboratory tests have been recorded parafoul  brood and  proteose of bees. Conclusion: сausative agents of 13 infectious animal diseases have been identified in the Dnipropetrovsk region by means of bacteriological investigations. Most commonly isolated pathogens of intestinal infections (colibacteriosis and salmonellosis)

Low-Energy Photodisintegration of the Deuteron and Big-Bang Nucleosynthesis

The photon analyzing power for the photodisintegration of the deuteron was measured for seven gamma-ray energies between 2.39 and 4.05 MeV using the linearly polarized gamma-ray beam of the High-Intensity Gamma-ray Source at the Duke Free-Electron Laser Laboratory. The data provide a stringent test of theoretical calculations for the inverse reaction, the neutron-proton radiative capture reaction at energies important for Big-Bang Nucleosynthesis. Our data are in excellent agreement with potential model and effective field theory calculations. Therefore, the uncertainty in the baryon density obtained from Big-Bang Nucleosynthesis can be reduced at least by 20%.Comment: 5 pages, 5 figure

Theory and Applications of Non-Relativistic and Relativistic Turbulent Reconnection

Realistic astrophysical environments are turbulent due to the extremely high Reynolds numbers. Therefore, the theories of reconnection intended for describing astrophysical reconnection should not ignore the effects of turbulence on magnetic reconnection. Turbulence is known to change the nature of many physical processes dramatically and in this review we claim that magnetic reconnection is not an exception. We stress that not only astrophysical turbulence is ubiquitous, but also magnetic reconnection itself induces turbulence. Thus turbulence must be accounted for in any realistic astrophysical reconnection setup. We argue that due to the similarities of MHD turbulence in relativistic and non-relativistic cases the theory of magnetic reconnection developed for the non-relativistic case can be extended to the relativistic case and we provide numerical simulations that support this conjecture. We also provide quantitative comparisons of the theoretical predictions and results of numerical experiments, including the situations when turbulent reconnection is self-driven, i.e. the turbulence in the system is generated by the reconnection process itself. We show how turbulent reconnection entails the violation of magnetic flux freezing, the conclusion that has really far reaching consequences for many realistically turbulent astrophysical environments. In addition, we consider observational testing of turbulent reconnection as well as numerous implications of the theory. The former includes the Sun and solar wind reconnection, while the latter include the process of reconnection diffusion induced by turbulent reconnection, the acceleration of energetic particles, bursts of turbulent reconnection related to black hole sources as well as gamma ray bursts. Finally, we explain why turbulent reconnection cannot be explained by turbulent resistivity or derived through the mean field approach.Comment: 66 pages, 24 figures, a chapter of the book "Magnetic Reconnection - Concepts and Applications", editors W. Gonzalez, E. N. Parke

Heavy Quarks and Heavy Quarkonia as Tests of Thermalization

We present here a brief summary of new results on heavy quarks and heavy quarkonia from the PHENIX experiment as presented at the "Quark Gluon Plasma Thermalization" Workshop in Vienna, Austria in August 2005, directly following the International Quark Matter Conference in Hungary.Comment: 8 pages, 5 figures, Quark Gluon Plasma Thermalization Workshop (Vienna August 2005) Proceeding

Single Electrons from Heavy Flavor Decays in p+p Collisions at sqrt(s) = 200 GeV

The invariant differential cross section for inclusive electron production in p+p collisions at sqrt(s) = 200 GeV has been measured by the PHENIX experiment at the Relativistic Heavy Ion Collider over the transverse momentum range $0.4 <= p_T <= 5.0 GeV/c at midrapidity (eta <= 0.35). The contribution to the inclusive electron spectrum from semileptonic decays of hadrons carrying heavy flavor, i.e. charm quarks or, at high p_T, bottom quarks, is determined via three independent methods. The resulting electron spectrum from heavy flavor decays is compared to recent leading and next-to-leading order perturbative QCD calculations. The total cross section of charm quark-antiquark pair production is determined as sigma_(c c^bar) = 0.92 +/- 0.15 (stat.) +- 0.54 (sys.) mb.Comment: 329 authors, 6 pages text, 3 figures. Submitted to Phys. Rev. Lett. Plain text data tables for the points plotted in figures for this and previous PHENIX publications are (or will be) publicly available at http://www.phenix.bnl.gov/papers.htm

Nuclear Modification of Electron Spectra and Implications for Heavy Quark Energy Loss in Au+Au Collisions at sqrt(s_NN)=200 GeV

The PHENIX experiment has measured mid-rapidity transverse momentum spectra (0.4 < p_T < 5.0 GeV/c) of electrons as a function of centrality in Au+Au collisions at sqrt(s_NN)=200 GeV. Contributions from photon conversions and from light hadron decays, mainly Dalitz decays of pi^0 and eta mesons, were removed. The resulting non-photonic electron spectra are primarily due to the semi-leptonic decays of hadrons carrying heavy quarks. Nuclear modification factors were determined by comparison to non-photonic electrons in p+p collisions. A significant suppression of electrons at high p_T is observed in central Au+Au collisions, indicating substantial energy loss of heavy quarks.Comment: 330 authors, 6 pages text, 3 figures. Submitted to Phys. Rev. Lett. Plain text data tables for the points plotted in figures for this and previous PHENIX publications are (or will be) publicly available at http://www.phenix.bnl.gov/papers.htm

Dilepton mass spectra in p+p collisions at sqrt(s)= 200 GeV and the contribution from open charm

The PHENIX experiement has measured the electron-positron pair mass spectrum from 0 to 8 GeV/c^2 in p+p collisions at sqrt(s)=200 GeV. The contributions from light meson decays to e^+e^- pairs have been determined based on measurements of hadron production cross sections by PHENIX. They account for nearly all e^+e^- pairs in the mass region below 1 GeV/c^2. The e^+e^- pair yield remaining after subtracting these contributions is dominated by semileptonic decays of charmed hadrons correlated through flavor conservation. Using the spectral shape predicted by PYTHIA, we estimate the charm production cross section to be 544 +/- 39(stat) +/- 142(syst) +/- 200(model) \mu b, which is consistent with QCD calculations and measurements of single leptons by PHENIX.Comment: 375 authors from 57 institutions, 18 pages, 4 figures, 2 tables. Submitted to Physics Letters B. v2 fixes technical errors in matching authors to institutions. Plain text data tables for the points plotted in figures for this and previous PHENIX publications are (or will be) publicly available at http://www.phenix.bnl.gov/papers.htm

Inclusive cross section and double helicity asymmetry for \pi^0 production in p+p collisions at sqrt(s)=200 GeV: Implications for the polarized gluon distribution in the proton

The PHENIX experiment presents results from the RHIC 2005 run with polarized proton collisions at sqrt(s)=200 GeV, for inclusive \pi^0 production at mid-rapidity. Unpolarized cross section results are given for transverse momenta p_T=0.5 to 20 GeV/c, extending the range of published data to both lower and higher p_T. The cross section is described well for p_T < 1 GeV/c by an exponential in p_T, and, for p_T > 2 GeV/c, by perturbative QCD. Double helicity asymmetries A_LL are presented based on a factor of five improvement in uncertainties as compared to previously published results, due to both an improved beam polarization of 50%, and to higher integrated luminosity. These measurements are sensitive to the gluon polarization in the proton, and exclude maximal values for the gluon polarization.Comment: 375 authors, 7 pages, 3 figures. Submitted to Phys. Rev. D, Rapid Communications. Plain text data tables for the points plotted in figures for this and previous PHENIX publications are (or will be) publicly available at http://www.phenix.bnl.gov/papers.htm

System Size and Energy Dependence of Jet-Induced Hadron Pair Correlation Shapes in Cu+Cu and Au+Au Collisions at sqrt(s_NN) = 200 and 62.4 GeV

We present azimuthal angle correlations of intermediate transverse momentum (1-4 GeV/c) hadrons from {dijets} in Cu+Cu and Au+Au collisions at sqrt(s_NN) = 62.4 and 200 GeV. The away-side dijet induced azimuthal correlation is broadened, non-Gaussian, and peaked away from \Delta\phi=\pi in central and semi-central collisions in all the systems. The broadening and peak location are found to depend upon the number of participants in the collision, but not on the collision energy or beam nuclei. These results are consistent with sound or shock wave models, but pose challenges to Cherenkov gluon radiation models.Comment: 464 authors from 60 institutions, 6 pages, 3 figures, 2 tables. Submitted to Physical Review Letters. Plain text data tables for the points plotted in figures for this and previous PHENIX publications are (or will be) publicly available at http://www.phenix.bnl.gov/papers.htm

Measurement of Transverse Single-Spin Asymmetries for Mid-rapidity Production of Neutral Pions and Charged Hadrons in Polarized p+p Collisions at sqrt(s) = 200 GeV

The transverse single-spin asymmetries of neutral pions and non-identified charged hadrons have been measured at mid-rapidity in polarized proton-proton collisions at sqrt(s) = 200 GeV. The data cover a transverse momentum (p_T) range 0.5-5.0 GeV/c for charged hadrons and 1.0-5.0 GeV/c for neutral pions, at a Feynman-x (x_F) value of approximately zero. The asymmetries seen in this previously unexplored kinematic region are consistent with zero within statistical errors of a few percent. In addition, the inclusive charged hadron cross section at mid-rapidity from 0.5 < p_T < 7.0 GeV/c is presented and compared to NLO pQCD calculations. Successful description of the unpolarized cross section above ~2 GeV/c using NLO pQCD suggests that pQCD is applicable in the interpretation of the asymmetry results in the relevant kinematic range.Comment: 331 authors, 6 pages text, 2 figures, 3 tables. Submitted to Phys. Rev. Lett. Plain text data tables for the points plotted in figures for this and previous PHENIX publications are (or will be) publicly available at http://www.phenix.bnl.gov/papers.htm