Fluoride (F) toothpaste is one of the most effective means of caries prevention. There is also evidence that mouthrinse solutions with antimicrobial agents reduce plaque formation and gingivitis and may be used as adjuncts to daily self-performed oral hygiene for risk patients. The authors hypothesize that using these solutions--without or with just a low F concentration after brushing--will ha...

BACKGROUND Some fluoridated toothpastes, available commercially, are described to have a protective effect against dental erosion. OBJECTIVES To evaluate the influence of the selected marketed toothpastes on the human enamel exposed to acid beverages. MATERIAL AND METHODS Enamel specimens from extracted human teeth were prepared (n = 40). Specimens were randomly divided into 10 experimental...

The aim of this in vitro study was to compare the remineralization potential of dental products containing calcium on human enamel softened by soft drinks. Fifty sound human premolar teeth were randomly divided into 5 treatment groups (n=10): artificial saliva, 1,000 ppm fluoride toothpaste, CPP-ACP paste, CPP-ACP with 900 ppm fluoride paste and tricalcium phosphate with 950 ppm fluoride paste....

Multilayer ceramic capacitors (MLCCs) for electric vehicles require their room temperature capacitance to change ≤ ±15% at −55°C 200°C. The dielectric constant (ε) of BaTiO3, a material widely used in MLCCs, drops >125°C making its application difficult. Here, we propose KCa2Nb3O10 (KCNO)-layered perovskite as strong candidate vehicle MLCCs ε does not abruptly with temperature. effect sintering...

The possible relation between the properties of six commercial carbons and their gasification rates with carbon dioxide a t a series of temperatures between 900 and 1300” has been investigated. The following properties of the carbons have been determined: yantitative and qualitative ash analyses, hydrogen content, interlayer spacing, average crystallite size, true and apparent ensity, porosity,...

This research investigates the potential of near infrared spectroscopy (NIRS) for the detection and quantification of pesticides in aqueous solution. Standard solutions of Alachlor and Atrazine (ranging in concentration from 1.25 100 ppm) were prepared by dilution in a Methanol/water solvent (1:1 methanol/water (v/v)). Near infrared transmission spectra were obtained in the wavelength region 40...

Chloroform is being administered to male Osborne-Mendel rats and to female B6C3F1 mice at concentrations of 0 (negative control), 200, 400, 900 or 1800 ppm in the drinking water. Matched control groups of both species receive a volume of water identical to that consumed by the corresponding 1800 ppm groups. At this writing, the animals have completed 23 months on test. Negative control and CHCl...

Clinical Research, GE Healthcare Finland Oy, PO Box 900, FI-00031 GE, Helsinki, Finland. VTT, Technical Research Centre of Finland, PO Box 1300, FI-33101 Tampere, Finland. Department of Anaesthesia, ENT and Eye Hospital, Helsinki University Central Hospital, PO Box 340, FI-00029 HUS, Helsinki, Finland. Department of Anaesthesia, Tampere University Hospital, PO Box 2000, FI-33521 Tampere, Finlan...