The lead exposure of children and their mothers has been studied in two towns with mean soil lead contents of 900 and 400 ppm. No significant difference in blood or fecal lead contents was demonstrated between the two populations, but a small difference in hair lead content was shown. The blood lead content of children was greater than that of their mothers and was higher in the summer than in ...

ABSTRACT Caves containing perennial ice deposits make up a little-known, but emerging part of the cryosphere under increasing scrutiny from scientific community. M-17, sag-type cave opening at 1879 m asl in Tolminski Migovec massif Julian Alps (NW Slovenia) contains underground deposit whose paleoclimate sensitivity is poorly understood and longevity current climate change risk. The past mass b...

AIM This research was conducted to evaluate the molluscicidal and mosquitocidal efficacy of silica nanoparticles in the eradication of the larvae and pupa of malaria and filariasis vector as well as vectors of rift-valley fever virus (Culex pipiens); Schistosoma mansoni vector and Biomphlaria alexandrina (snail and egg masses). MATERIALS AND METHODS Hydrophilic nanosilica particles (NSPs) wer...

This study was carried out on 240 broiler chickens in a completely randomized design in four treatments at 0, 300, 600 and 900 pmm levels of silver nanoparticles with four repetitions within 16 separate cages. The chickens were individually weighed and recorded at the end of every week of experiment. Increase in the amount of food intake and weight, was recorded every week and finally the food ...

Thirty-six crossbred gilts 10 months of age were bred and assigned to dietary magnesium levels of 400 or 900 ppm. At parturit ion the levels were modified to 150 and 650 ppm. During lactation phosphorus levels of .30 or .54% were fed within each magnesium level. Magnesium levels did not influence the number or weight of pigs at birth or weaning. Sows fed the high level of magnesium (650 ppm) ma...

Recent rapid development of electromagnetic field (EMF) emitters (mobile phones, microwave broadcast stations, radiolocation, microwave sources in household devices) increased the environmental level of electromagnetic radiation. This, in turn, increased the interest on the possible risk of harmful influence of exposure to EMF. On the other hand, the low energy EMF of both low (homogenous magne...

We demonstrate a bright, bandwidth-tunable, quasi-phase-matched single-waveguide source generating photon pairs near 900 nm and 1300 nm. Two-photon coincidence spectra are measured at a range of operating temperatures of a periodically-poled KTiOPO(4) (PPKTP) waveguide, which supports both type-0 and type-II spontaneous parametric down-conversion. We map out relative contributions of two-photon...

calcium fluoride deposit during fluoride application. uptake and retention of fluoride by saliva depends generally on the concentration of calcium. in this study, the effect of calcium pre-rinse on salivary fluoride concentration after a 900 ppm fluoride mouthwash was investigated.this cross-over double-blind randomized clinical trial was conducted in a girls' dormitory in zahedan university of...