A gelatin-free model system for the study of the basic radiation-induced polymerization in PAG dosimeters

The fluoride resistance and smooth surface adherence characteristics of Streptococcus mutans were examined using tooth model and radioactive cell assays. Resistance to 600 ppmF by S. mutans isolated from the plaque of radiation-induced xerostomia patients receiving daily topical applications of a caries preventive 1% NaF gel was transient. Resistance induced in vitro in two strains of S. mutans by exposure to gradually increasing levels of NaF was apparently permanent. Smooth surface adherence by both fluoride-sensitive and -resistant strains of S. mutans 6715 in a tooth model system was slightly diminished by 1% NaF gel. Fluoride-resistant strains retained 89 to 93% of their adherence capability in 600 ppmF, as determined by the cell radiolabeling assay.

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Co-60 gamma irradiation effects on electrical characteristics of HfO 2 MOSFETs and specification of basic radiation- induced degradation mechanism

Radiation Physics and Chemistry ◽

10.1016/j.radphyschem.2018.03.007 ◽

2018 ◽

Vol 149 ◽

pp. 7-13 ◽

Cited By ~ 8

Author(s):

Senol Kaya ◽

Aleksandar Jaksic ◽

Ercan Yilmaz

Keyword(s):

Gamma Irradiation ◽

Degradation Mechanism ◽

Electrical Characteristics ◽

Irradiation Effects ◽

Radiation Induced ◽

Basic Radiation

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Radiation-induced free-radical fragmentation of ceramides in a model system

High Energy Chemistry ◽

10.1134/s0018143909040043 ◽

2009 ◽

Vol 43 (4) ◽

pp. 269-273 ◽

Cited By ~ 2

Author(s):

I. L. Yurkova ◽

J. Arnhold

Keyword(s):

Free Radical ◽

Model System ◽

Radical Fragmentation ◽

Radiation Induced

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Ultrastructural localization of several phosphatases with cerium.

Journal of Histochemistry & Cytochemistry ◽

10.1177/31.10.6309949 ◽

1983 ◽

Vol 31 (10) ◽

pp. 1197-1208 ◽

Cited By ~ 232

Author(s):

J M Robinson ◽

M J Karnovsky

Keyword(s):

Enzymatic Hydrolysis ◽

Inorganic Phosphate ◽

Ultrastructural Localization ◽

Model System ◽

Cerium Phosphate ◽

Free Model ◽

A Cell ◽

Hydrolysis Of ◽

Product Accumulation

Cerium ions have been used as the capture agent for inorganic phosphate released during the enzymatic hydrolysis of phosphate-containing substrates by a variety of phosphatases. Cerium phosphate reaction product accumulation is proportional to the amount of enzyme present in a cell-free model system. Ultrastructurally, cerium phosphate reaction product appears as a very fine electron-dense precipitate. Cerium appears to be a better capture agent for inorganic phosphate than lead in that reaction product is usually more uniform and more consistently reproducible when cerium is used. Furthermore, nonspecific deposits of reaction product that are commonly encountered in lead-based phosphatase reactions are virtually nonexistent when cerium is the capture agent.

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