200 research outputs found
First Report of Alternaria Black Spot Disease Caused by Alternaria alternata on the Invasive Weed Solanum rostratum in Xinjiang, China
Solanum rostratum is a noxious weed, native to Mexico and the USA, which has invaded Liaoning, Jilin, Hebei, Inner
Mongolia, Shanxi, Xinjiang and Beijing, China (Eminniya et al., 2013). In August 2015, foliar symptoms of yellowish to black
spots were observed on plants of S. rostratum nearby an agricultural plantation in Changji, Xinjiang. The following year, about
17% of the 206 plants surveyed on about 0.2 ha of deserted farmland were infected from July-September (at 19-35°C under
29-97% RH)
Partial Wave Analysis of
BES data on are presented. The
contribution peaks strongly near threshold. It is fitted with a
broad resonance with mass MeV, width MeV. A broad resonance peaking at 2020 MeV is also required
with width MeV. There is further evidence for a component
peaking at 2.55 GeV. The non- contribution is close to phase
space; it peaks at 2.6 GeV and is very different from .Comment: 15 pages, 6 figures, 1 table, Submitted to PL
Search for the Chiral Magnetic Effect in Au+Au collisions at GeV with the STAR forward Event Plane Detectors
A decisive experimental test of the Chiral Magnetic Effect (CME) is
considered one of the major scientific goals at the Relativistic Heavy-Ion
Collider (RHIC) towards understanding the nontrivial topological fluctuations
of the Quantum Chromodynamics vacuum. In heavy-ion collisions, the CME is
expected to result in a charge separation phenomenon across the reaction plane,
whose strength could be strongly energy dependent. The previous CME searches
have been focused on top RHIC energy collisions. In this Letter, we present a
low energy search for the CME in Au+Au collisions at
GeV. We measure elliptic flow scaled charge-dependent correlators relative to
the event planes that are defined at both mid-rapidity and at
forward rapidity . We compare the results based on the
directed flow plane () at forward rapidity and the elliptic flow plane
() at both central and forward rapidity. The CME scenario is expected
to result in a larger correlation relative to than to , while
a flow driven background scenario would lead to a consistent result for both
event planes[1,2]. In 10-50\% centrality, results using three different event
planes are found to be consistent within experimental uncertainties, suggesting
a flow driven background scenario dominating the measurement. We obtain an
upper limit on the deviation from a flow driven background scenario at the 95\%
confidence level. This work opens up a possible road map towards future CME
search with the high statistics data from the RHIC Beam Energy Scan Phase-II.Comment: main: 8 pages, 5 figures; supplementary material: 2 pages, 1 figur
Association of adverse perinatal outcomes of intrahepatic cholestasis of pregnancy with biochemical markers
__Background__ Intrahepatic cholestasis of pregnancy is associated with adverse perinatal outcomes, but the association
with the concentration of specific biochemical markers is unclear. We aimed to quantify the adverse perinatal effects
of intrahepatic cholestasis of pregnancy in women with increased serum bile acid concentrations and determine
whether elevated bile acid concentrations were associated with the risk of stillbirth and preterm birth.
__Methods__ We did a systematic review by searching PubMed, Web of Science, and Embase databases for studies
published from database inception to June 1, 2018, reporting perinatal outcomes for women with intrahepatic
cholestasis of pregnancy when serum bile acid concentrations were available. Inclusion criteria were studies defining
intrahepatic cholestasis of pregnancy based upon pruritus and elevated serum bile acid concentrations, with or
without raised liver aminotransferase concentrations. Eligible studies were case-control, cohort, and populationbased studies, and randomised controlled trials, with at least 30 participants, and that reported bile acid concentrations
and perinatal outcomes. Studies at potential higher risk of reporter bias were excluded, including case reports, studies
not comprising cohorts, or successive cases seen in a unit; we also excluded studies with high risk of bias from
groups selected (eg, a subgroup of babies with poor outcomes were explicitly excluded), conference abstracts, and
Letters to the Editor without clear peer review. We also included unpublished data from two UK hospitals. We did a
random effects meta-analysis to determine risk of adverse perinatal outcomes. Aggregate data for maternal and
perinatal outcomes were extracted from case-control studies, and individual patient data (IPD) were requested from
study authors for all types of study (as no control group was required for the IPD analysis) to assess associations
between biochemical markers and adverse outcomes using logistic and stepwise logistic regression. This study is
registered with PROSPERO, number CRD42017069134.
__Findings__ We assessed 109 full-text articles, of which 23 studies were eligible for the aggregate data meta-analysis
(5557 intrahepatic cholestasis of pregnancy cases and 165136 controls), and 27 provided IPD (5269 intrahepatic
cholestasis of pregnancy cases). Stillbirth occurred in 45 (0·91%) of 4936 intrahepatic cholestasis of pregnancy cases
and 519 (0·32%) of 163947 control pregnancies (odds ratio [OR] 1·46 [95% CI 0·73â2·89]
Measurement of the cross section of high transverse momentum ZâbbÌ production in protonâproton collisions at âs = 8 TeV with the ATLAS detector
This Letter reports the observation of a high transverse momentum ZâbbÌ signal in protonâproton collisions at âs=8 TeV and the measurement of its production cross section. The data analysed were collected in 2012 with the ATLAS detector at the LHC and correspond to an integrated luminosity of 19.5 fbâÂč. The ZâbbÌ decay is reconstructed from a pair of b -tagged jets, clustered with the anti-ktkt jet algorithm with R=0.4R=0.4, that have low angular separation and form a dijet with pT>200 GeVpT>200 GeV. The signal yield is extracted from a fit to the dijet invariant mass distribution, with the dominant, multi-jet background mass shape estimated by employing a fully data-driven technique that reduces the dependence of the analysis on simulation. The fiducial cross section is determined to be
ÏZâbbÂŻfid=2.02±0.20 (stat.) ±0.25 (syst.)±0.06 (lumi.) pb=2.02±0.33 pb,
in good agreement with next-to-leading-order theoretical predictions
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