/ This paper reports an assessment of various methods for sampling particulate surface contami^ nation for use in the field. The results from the study will be used to develop guidance for monitoring particulate surface contamination in the workplace. Three types of adhesive tape, two manual and two 'semi-automatic' wipe methods, and one Smair method were assessed. A field assessment of selecte...

The use of constructed wetlands for wastewater treatment has been proposed as an intermediate technological solution for handling wastewater. The aim of the study was to assess the efficiency of a constructed wetland at Egerton University, Kenya for heavy metals removal from wastewater. The wetland has been used for tertiary treatment of effluent from waste stabilization ponds system since 2007...

Alexander, F. W., and Delves, H. T. (1972). Archives of Disease in Childhood, 47, 446. Deaths from acute lead poisoning. The three fatal cases of acute lead poisoning described show the difficulty experienced in reaching an early diagnosis of lead intoxication. A rapid micromethod is now available for the determination of whole blood lead levels on small samples of blood, using atomic absorptio...

1. Vesterberg, 0., and Bergstrom, T., Determination of cadmium in blood by use of atomic absorption spectroscopy with crucibles-and a rational procedure for dry-ashing. Clin. Chem. 23, 555 (1977). 2. Bogden, J. D., and Joselow, M. M., A micro-method for the collection and analysis of trace metals by paper-in-a-cup atomic absorption spectrophotometry. Am. md. Hyg. Assoc. J. 35, 88 (1974). 3. Cer...

OBJECTIVE To evaluate a novel device for its efficacy in removing experimental biofilm from root surfaces and its potential for concomitantly removing/roughening the surface substance. METHODS AND MATERIALS A novel acrylic rotary device (biofilm remover, BR) was tested in vitro in three experiments: surface loss, surface roughness [positive controls: Perioset (PS) and Proxoshape (PR)] and bio...

PURPOSE To present the findings from histological and chemical analysis of large dacryoliths and correlate them with previous reports. MATERIALS AND METHODS Dacryoliths were found in 8% of 216 dacryocystorhinostomy operations. In two cases with mild chronic dacryocystitis, large dacryoliths were extracted. The first case was a 42-year-old male with three dacryoliths in a lacrimal sac, present...

OBJECTIVE The aim of the present study was to determine the release of arsenic from 2 gray Portland cements, a white Portland cement, and 2 MTAs (ProRoot and MTA-Angelus). STUDY DESIGN The materials were manipulated and placed in plastic tubes, and the tubes were immersed in glass flasks containing water with grade reagent, pH 5.0. After 3 and 168 h, the water in which the material had been i...

A method for total calcium in serum was optimized, a dual double-beam atomic absorption spectrophotometer being used, with strontium as an internal reference. The effect of HCI and lanthanum concentrations on the signals of both calcium and strontium was determined. The final analysis was unaffected by known sources of interference in serum at a 50-fold dilution of serum in 50mmolar HCI contain...

A new, atomic absorption spectrophotometric method for serum iron and iron-binding capacity is described, which utilizes 20% (w/v) TCA plus heating at 90#{176} for 15 mm. This procedure liberates the ferric iron; precipitates the protein, facilitating removal by centrifugation; and avoids significant interferences by contaminating hemoglobin iron. The method is highly specific, accurate, and ha...

Ninetysix untreated patients with Malignant lymphoma's, 81 Hodgkin's disease and 15 Burkitt's lymphoma were studied for zinc (Zn) and selenium (Se) status. Plasma and hair Zn, and Se levels were measured by atomic absorption spectrophotometry. Chronic Zn and Se deficiencies (low plasma and low hair Zn and Se levels together) were found to be associated with Malignant lymphoma's in Turkish child...