BACKGROUND Different methods have been used for detecting developmental defects of enamel (DDE). This study aimed to compare photographic and replication methods with the direct clinical examination method for detecting DDE in children's permanent incisors. METHODS 110 8-10-year-old schoolchildren were randomly selected from an examined sample of 335 primary Shiraz school children. Modified D...

IMPORTANCE The causes of late-onset Alzheimer disease (AD) are not yet understood but likely include a combination of genetic, environmental, and lifestyle factors. Limited epidemiological studies suggest that occupational pesticide exposures are associated with AD. Previously, we reported that serum levels of dichlorodiphenyldichloroethylene (DDE), the metabolite of the pesticide dichlorodiphe...

p, p'-Dichlorodiphenyldichloroethylene (DDE), the major metabolite of Dichlorodiphenyltrichloroethane (DDT), is an organochlorine pollutant and associated with cancer progression. The present study investigated the possible effects of p,p'-DDE on colorectal cancer and the involved molecular mechanism. The results indicated that exposure to low concentrations of p,p'-DDE from 10(-10) to 10(-7) M...

Systemic effects of p, p'-DDE (1, 1-dichloro-2, 2 bis (p-chlorophenyl) ethylene; DDE) on immature male rats were investigated in pubertal Wistar rats after oral administration of DDE. Special rat chow containing 125 ppm DDE (approximately 10 mg/kg DDE) had been administered daily for 42 d since 6 wk of age and its effects had been observed until 12 wk of age. The administration of DDE did not p...

BACKGROUND Dichlorodiphenyldichloroethylene (DDE) and other organochlorines suppress immunity biomarkers in animals and humans. Our aim was to study the association between prenatal levels of DDE and lower respiratory tract infection in infants independently from polychlorinated biphenyls (PCBs) and other organochlorines. METHODS Maternal levels of p'p'-DDE, dichlorodiphenyltrichloroethane (p...

This paper presents an improved direct dimension exchange method (DDE) for synchronous load balancing for k-ary n-cube multicom-puters. The new method is based on the improved DEM for hypercube. The original DEM when extended to the k-ary n-cube requires many iterations in exchanging loads between neighboring nodes to converge to a balanced state. The original DDE does not requires iteratively ...

My concern in this paper is a distinction most commonly associated with the Doctrine of the Double Effect (DDE). Elizabeth Anscombe claims that the denial of the DDE "has been the corruption of non-Catholic thought, and its abuse the corruption of Catholic thought." Many other philosophers, on the other hand, regard the DDE as not just wrong, but also wildly implausible. Some would even say tha...

An inverse correlation between the concentration of DDE in human breast milk samples and the duration of breast feeding prompted the present study of the effects of DDE administration on the lactational performance of primiparous rats. Daily doses of 10 mg p,p'-DDE/kg body weight were given to virgin female Sprague-Dawley rats 5 d/wk for 5 wk prior to mating and continued throughout the gestati...

One,1-dichloro-2,2 bis(p-chlorophenyl) ethylene (p,p'-DDE), the major metabolite of 2,2-bis(4-Chlorophenyl)-1,1,1-trichloroethane (DDT), is a known persistent organic pollutant and male reproductive toxicant. It has antiandrogenic effect. However, the mechanism by which p,p'-DDE exposure causes male reproductive toxicity remains unknown. In the present study, rat Sertoli cells were used to inve...

The chemistry of Mu transposition is executed within a tetrameric form of the Mu transposase (MuA protein). A triad of DDE (Asp, Asp35Glu motif) residues in the central domain of MuA (DDE domain) is essential for both the strand cleavage and strand transfer steps of transposition. Previous studies had suggested that complete Mu transposition requires all four subunits in the MuA tetramer to car...