Escherichia coli O157:H7 is a major food safety concern for the beef industry. Several studies have provided evidence that cattle hides are the main source of beef carcass contamination during processing and that reductions in the E. coli O157:H7 load on the hides of cattle entering processing facilities will lead to reductions in carcass contamination. Bacteriophages have been proposed as a no...

Naphthalene, 1-methylnaphthalene, and 2-methylnaphthalene have been identified in at least 654, 36, and 412, respectively, of the 1,662 hazardous waste sites that have been proposed for inclusion on the EPA National Priorities List (NPL) (HazDat 2005). However, the number of sites evaluated for naphthalene, 1-methylnaphthalene, and 2-methylnaphthalene is not known. The frequency of these sites ...

The emotion of disgust, with feelings of revulsion and behavioral withdrawal, make it a prime emotion to aid in the avoidance of sources of contamination, including sources of potential infectious disease. We tested the theory that living in a region with a historically high prevalence of infectious diseases would promote higher levels of disgust and contamination sensitivity as a protective me...

The first positive detection of the X-ray background fluctuations at small angular scales is reported. ROSAT PSPC archive pointed observations are used to measure fluctuations at scales of 0. 03−0. 4. The pointings have been selected from an area free from galactic contamination. At separations below ∼ 0. 1 clusters of galaxies become a substantial source of the background fluctuations. The aut...

Significant in-band stray light (IBSL) error at solar zenith angle (SZA) values larger than 77◦ near sunset in 4 SBUV/2 (Solar Backscattered Ultraviolet) instruments, on board the NOAA-14, 17, 18 and 19 satellites, has been characterized. The IBSL error is caused by large surface reflection and scattering of the air-gapped depolarizer in front of the instrument’s monochromator aperture. The sou...

It is common, in deconvolution problems, to assume that the measurement errors are identically distributed. In many real life applications however, this condition is not satisfied and the deconvolution estimators developed for homoscedastic errors become inconsistent. In this paper, we introduce a kernel estimator of a density in the case of heteroscedastic contamination. We establish consisten...

Given the possibility of waterborne diseases caused by inappropriate rainwater harvesting systems, a survey was conducted in Uganda to assess existing knowledge of both physical and non-physical measures that safeguard harvested rainwater. Households who had received rainwater tanks were assessed on issues related to harvested rainwater quality. The study shows that 84% of respondents were awar...

We investigate the 21-cm emission from the epoch between reionization zr and Gunn-Peterson transparency zgp. According to the lognormal model of the thermal history around reionization, hydrogen clouds in zr > z > zgp are hot, and a predominant part of baryonic gas is ionized, but still opaque to Lyα photons. Therefore, 21-cm emission is a distinctive characteristic of this epoch. We show that ...

Parasites are commonly associated with vegetable or fruit borne outbreaks of gastroenteritis. Among all pathogenic intestinal parasites, helminthes cause the most number of parasitic infections in humans and animals, especially in developing countries. We conducted a study to determine the extent of parasitic contamination of raw vegetables sold in some markets of Casablanca (Morocco) .Vegetabl...