The purpose of this study was to investigate the correlation between corrosion resistance and surface composition of an experimental Ti-20 mass% Cr casting alloy in a saline solution containing fluoride. The alloy had a greater resistance to corrosion in a fluoride-containing saline solution than did commercially pure titanium. However, with confirmed dissolution of titanium and chromium, it me...

introduction: evaluation of bonding in atomic level, by sem/eds analysis of si atoms, is an exact method for determination of bond strength of metal and porcelain. the purpose of this study was to evaluate the bond strength of one noble alloy and two base metal alloys with and without beryllium. methods and materials: six specimens of each alloy begostar, rexillium iii, wiron 99 (10×10×1mm dime...

AIM Oral environment of the mouth is a suitable place for biodegradation of alloys used in orthodontic wires. The toxicity of these alloys namely nickel and chromium has concerned the researchers about the release of these ions from orthodontic wires and brackets. The aim of this study was to measure the levels of nickel and chromium ions released from 0.018" stainless steel (SS) and NiTi wires...

Heavy metals are stable environmental contaminants, causing various alterations in target tissues. Garlic has some beneficial effect in preventing heavy metal induced various alteration. The objective was to investigate the possible protective role of fresh aqueous homogenate of garlic on hematology, erythrocyte antioxidant defense system in male albino rats treated with NiSO4 and K2Cr2O7. Rats...

Aim. To study serum concentrations of trace and macro elements their correlations in children adolescents after antitumor therapy, depending on the presence or absence caries. Materials methods. The included 98 patients aged 4 to 17 years who were remission an therapy performed for acute leukemia lymphomas. Patients with carious tooth lesions group 1 ( n = 34) without caries – 2 64). We used in...

Abstract The structure of the solid pack-boriding layer nickel-based alloy is studied in this paper. GH4169 was subjected to treatment at 850 °C and 950 °C, boriding studied. After treatment, a relatively continuous uniform formed on surface, which mainly composed nickel borides chromium borides. sample layered layer, diffusion zone, substrate. Cr migrated surface form CrB, 5 B 3 , 2 borides, w...

OBJECTIVE To estimate the prevalence of beryllium sensitization among former and current Department of Defense workers from a conventional munitions facility. METHODS Participants were screened by using Beryllium Lymphocyte Proliferation Test. Those sensitized were offered clinical evaluation for chronic beryllium disease. RESULTS Eight (1.5%) of 524 screened workers were found sensitized t...

A, Ahrens W et al. Biomonitoring on carcinogenic metals and oxidative DNA damage in a cross-sectional study. nickel excretion in populations living in the proximity of two Russian nickel refineries: a Norwegian-Russian population-based study. stability and reference values for urinary chromium and nickel. of cadmium, chromium, manganese, nickel and lead in whole blood, urine, axillary hair and ...

The aim of this paper is to assess the effect of liming and low doses of municipal sewage sludge (5%, 10%, 15% of the soil mass) on lead, chromium and nickel speciation in soil. The 420-day experiment was carried out in laboratory conditions. In all the samples lead, chromium and nickel concentration was determined with the ICP-AES method, while the content of those metals in different fraction...