spectrometric techniques for the analysis of trace lead have developed rapidly due to the increasing need for accurate measurements at extremely low levels of this element in diverse matrices. this review covers separation and preconcentration procedures, and considers the features of the application with several spectrometric techniques. the use of an appropriate sample handling technique is a...

Abstract. To investigate the effects of aerosols on lightning activity, Weather Research and Forecasting (WRF) Model with a two-moment bulk microphysical scheme model was employed to simulate multicell thunderstorm that occurred in metropolitan Beijing area. The results suggest under polluted conditions activity is significantly enhanced during developing mature stages. Electrification discharg...

introduction hazards can be divided into two main groups: one based on origin and other based on speed of occurrence. from view point of speed, the hazards divided into catastrophe and gradual types. for example earthquake, flooding, landslide, avalanche and intense rainfall especially hail are classified into catastrophe events. gradual events include drought, global warming and soil creeping....

OBJECTIVE Low control beliefs (CB) are related to objective cognitive functions, but the link between CB and subjective memory complaints (SMC) is unclear. The aim of this study was to investigate the associations between CB (level and change) and SMC over a 10-year span. METHODS The study utilized a large national sample of participants (N = 3272, M = 56.52, SD = 11.84) from the Midlife in t...

Automatic alignment (registration) of 3D images of adult fruit fly brains is often influenced by the significant displacement of the relative locations of the two optic lobes (OLs) and the center brain (CB). In one of our ongoing efforts to produce a better image alignment pipeline of adult fruit fly brains, we consider separating CB and OLs and align them independently. This paper reports our ...

Convectively-induced turbulence (CIT) is one of several threats that requires aircraft to avoid thunderstorms in order to mitigate the risk of passenger injury or aircraft damage. Current Federal Aviation Administration (FAA) thunderstorm avoidance guidelines proscribe flight within 20 nautical miles of a thunderstorm, above thunderstorm tops or beneath anvils. In practice, interpretation of th...

Abstract. Aerosol–cloud interactions remain largely uncertain with respect to predicting their impacts on weather and climate. Cloud microphysics parameterization is one of the factors leading large uncertainty. Here, we investigate anthropogenic aerosols convective intensity precipitation a thunderstorm occurring 19 June 2013 over Houston Chemistry version Weather Research Forecast model (WRF-...

Unrelated-donor umbilical cord blood (CB) is a useful alternative hematopoietic stem cell source for patients without suitably matched and readily available related or unrelated stem cell donors. Expectant parents today may have the option of either donating the CB to a public CB bank or keeping and storing the CB in a private bank for potential use in the future. The alternatives are often ref...

I ntroduction: Multifocal motor neuropathy (MMN) is a rare, treatable, immune-mediated neuropathy often associated with multifocal conduction block (CB). The hallmark electrodiagnostic feature is the presence of CB occurring at non-entrapment sites. However, MMN without CB has also been described and can be diagnosed, even in the absence of CB. Therefore, it is crucial to diagnose and identify ...