Investigation of the Electrocatalytic Reduction of Peroxydisulfate Using Scanning Electrochemical Microscopy.

The elementary steps of the electrocatalytic reduction of SO using the Ru(NH) redox couple were investigated using scanning electrochemical microscopy (SECM) and steady-state voltammetry (SSV). SECM investigations were carried out in a 0.1 M KCl solution using a 3.

[Dental status of 14-18-year old secondary school students in Budapest (VIII. District) in 1991. (Implications of a dental-sociological study)].

In this dento-sociological examination the dental status of 1623 secondary-school-students living in the capital of Hungary, was found better than that of the same-aged students examined previously. The number of decayed teeth was higher than the number of filled teeth. The average level of oral hygiene was found between "good" and "middle" levels.

[Pharmacokinetic study of various fluoride compounds in rats].

The fluoride excretion of 40 rats has been monitored after the consumption of drinking water containing NaF, CaF2 and CaF2 + alum (KRl/SO4/2. The fluoride excretion of the animals containing NaF and CaF2 + alum increased in a significant extent. No significant difference could be found in the fluoride excretion of the two groups.

Anticariogenic effect of fluoridated milk and water in rats.

The aim of the study was to get further experimental data on the anticariogenic effect of sodium fluoride (NaF) when administered in milk or water. Thirty six weanling Osborne-Mendel rats were divided into two experimental groups (A, B) of 12 rats each and two control groups (C, D) of six rats each. During the experimental period of four weeks all animals were superinfected with Strep.