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A microspectrophotometric analysis of the effect of fluoride on immature enamel matrix protein of rat molar teeth (1980)

Smid, J. R. ; Kruger, B. J.

Springer

Calcified tissue international 30 (1980), S. 57-66

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ISSN: 1432-0827

Keywords: Dental enamel ; Sodium fluoride ; Microspectrophotometry ; Enamel matrix protein ; Amelogenesis

Source: Springer Online Journal Archives 1860-2000

Topics: Biology , Medicine , Physics

Notes: Summary Over a 24-h period, Wistar rats from 4 litters, 6 to 9 days old, were given five intraperitoneal injections of a solution of 0.9% sodium chloride containing sodium fluoride (3 mg F/kg body weight). Within-litter controls were used. All rats were killed by decapitation 2 h after the final injection and the rat heads, cut sagittally, were processed for protein histochemistry. The intensity of staining of the protein in the enamel matrix of the upper jaw molar tooth buds was quantified using the two-wavelength method of microphotometry. A significant increase in the intensity of staining of fluoride-treated tissues over controls was observed with the histochemical methods specific for arginine (P〈0.01), tyrosine (P 〈 0.05), and cysteine (P〈0.05). Other histochemical methods specific for amino acid groups failed to show any significant difference between fluoride and non-fluoride-treated enamel matrix.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/BF02408607

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On the boundary value problem for an elastic cylinder with homogenized fuzzy-cracks (1986)

Najzar, K. ; Šmíd, J.

Springer

Archive of applied mechanics 56 (1986), S. 401-406

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ISSN: 1432-0681

Source: Springer Online Journal Archives 1860-2000

Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics

Description / Table of Contents: Übersicht Der Begriff der homogenisierten Fuzzy-Cracks (HFC) wird als Modell für die klassischen Risse in einem Festkörper eingeführt. Ein Randwertproblem für einen elastischen Zylinder mit Fuzzy-Cracks wird dargestellt und gelöst, wobei Axialsymmetrie und verallgemeinerter ebener Verzerrungszustand angenommen werden. Unter anderem wird die Konvergenz eines Iterationsverfahrens für die Lösung des Randwertproblems gezeigt.

Notes: Summary An idea of homogenized fuzzy-cracks (HFC) as a model of the classical cracks in a solid body is introduced. A boundary value problem for an elastic cylinder with HFC is presented and analyzed under the assumptions of axisymmetry and generalized plane strain. Among others, the convergence of an iterative algorithm to the solution of the boundary value problem is shown.