62 research outputs found
Detecting a difference – assessing generalisability when modelling metabolome fingerprint data in longer term studies of genetically modified plants
Search for annual and diurnal rate modulations in the LUX experiment
Various dark matter models predict annual and diurnal modulations of dark matter interaction rates in Earth-based experiments as a result of the Earth’s motion in the halo. Observation of such features can provide generic evidence for detection of dark matter interactions. This paper reports a search for both annual and diurnal rate modulations in the LUX dark matter experiment using over 20 calendar months of data acquired between 2013 and 2016. This search focuses on electron recoil events at low energies, where leptophilic dark matter interactions are expected to occur and where the DAMA experiment has observed a strong rate modulation for over two decades. By using the innermost volume of the LUX detector and developing robust cuts and corrections, we obtained a stable event rate of 2.3±0.2  cpd/keVee/tonne, which is among the lowest in all dark matter experiments. No statistically significant annual modulation was observed in energy windows up to 26  keVee. Between 2 and 6  keVee, this analysis demonstrates the most sensitive annual modulation search up to date, with 9.2σ tension with the DAMA/LIBRA result. We also report no observation of diurnal modulations above 0.2  cpd/keVee/tonne amplitude between 2 and 6  keVee.Various dark matter models predict annual and diurnal modulations of dark matter interaction rates in Earth-based experiments as a result of the Earth's motion in the halo. Observation of such features can provide generic evidence for detection of dark matter interactions. This paper reports a search for both annual and diurnal rate modulations in the LUX dark matter experiment using over 20 calendar months of data acquired between 2013 and 2016. This search focuses on electron recoil events at low energies, where leptophilic dark matter interactions are expected to occur and where the DAMA experiment has observed a strong rate modulation for over two decades. By using the innermost volume of the LUX detector and developing robust cuts and corrections, we obtained a stable event rate of 2.30.2~cpd/keV/tonne, which is among the lowest in all dark matter experiments. No statistically significant annual modulation was observed in energy windows up to 26~keV. Between 2 and 6~keV, this analysis demonstrates the most sensitive annual modulation search up to date, with 9.2 tension with the DAMA/LIBRA result. We also report no observation of diurnal modulations above 0.2~cpd/keV/tonne amplitude between 2 and 6~keV
Sub-decadal turbidite frequency during the early Holocene: Eel Fan, offshore northern California
Remotely operated and autonomous underwater vehicle technologies were used to image and sample exceptional deep sea outcrops where an ?100-m-thick section of turbidite beds is exposed on the headwalls of two giant submarine scours on Eel submarine fan, offshore northern California (USA). These outcrops provide a rare opportunity to connect young deep-sea turbidites with their feeder system. 14C measurements reveal that from 12.8 ka to 7.9 ka, one turbidite was being emplaced on average every 7 yr. This emplacement rate is two to three orders of magnitude higher than observed for turbidites elsewhere along the Pacific margin of North America. The turbidites contain abundant wood and shallow-dwelling foraminifera, demonstrating an efficient connection between the Eel River source and the Eel Fan sink. Turbidite recurrence intervals diminish fivefold to ?36 yr from 7.9 ka onward, reflecting sea-level rise and re-routing of Eel River sediments
Controle de doenças de plantas pela rotação de culturas
Esta revisão aborda a importância da escolha e da adoção de práticas culturais e seus reflexos na intensidade de doenças de plantas. São apresentados conceitos básicos referente ao tema e os de rotação e monocultura. Discutem-se os princÃpios ou fundamentos e potencialidade do uso da rotação e do manejo integrado de doenças, as consequências da nutrição de fitopatógenos, dos eventos biológicos ocorrentes nos restos culturais, as caracterÃsticas dos fitopatógenos potencialmente controláveis e dos não controláveis pela rotação
The Effect of the Northeast Dairy Compact on Producers and Consumers, with Implications of Compact Contagion
A comparison of mothers' concerns regarding the care-taking tasks of newborns with congenital heart disease before and after assuming their care
Isodicentric X chromosome in a moderately tall patient with gonadal dysgenesis: lack of effect of functional centromere on inactivation pattern.
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