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Biomedical subjects

G Mutlu

Publications and source records attributed to G Mutlu.

17 recordsLinked to original sources

Human herpesvirus 6 and human herpesvirus 7 infections in renal transplant recipients and healthy adults in Turkey.

We explored the prevalence of human herpesvirus 6 (HHV-6) and human herpesvirus 7 (HHV-7) infections in 16 renal transplant recipients and 16 healthy controls by virus isolation, serology, polymerase chain reaction (PCR) followed by dot blot hybridization. HHV-6 variant A was isolated from one renal transplant recipient. Seven patients (44%) and six controls (38%) had HHV-6 variant B DNA in their peripheral blood mononuclear cells. The prevalence of HHV-7 DNA was found to be the same in patients and controls (19%).

Adult↗

Factors that affect the rheologic properties of acrylic resin denture base materials.

The rheologic characteristics of different formulations of acrylic resin denture base materials are presented in this study. This is of practical significance in selecting resins with optimum rheologic properties for denture base construction. The materials are characterized in respect to their constituents, mean powder particle size and distribution, molecular weight averages and distributions, and glass transition temperature. A comparison of the polymers indicates that smaller particles saturate with monomer more readily, and this results in a higher viscosity. A higher viscosity for higher molecular weight and lower viscosity for lower molecular weight have been observed. Increasing the percentage of copolymerization increases the viscosity. No correlation has been found between the rheologic properties of denture base polymers and the powder glass transition temperature.

Acrylic Resins↗

Determination of doughing and manipulation times of acrylic resin denture base material and a proposal for a specification for a packing plasticity test.

The doughing and manipulation times of a range of acrylic resin denture base polymers are presented in this study. The methods evaluated were: (i) probing following American Society for testing materials specification, F451-76; (ii) hole penetration following British Standard, 2487: 1989 and International Standard Organisation, 1567: 1988; (iii) probing using a penetrometer employing a 20 g load and 1 mm diameter needle; (iv) oscillating rheometer apparatus used at a fixed frequency of 1 Hz by sweeping through a programmed linear increase in strain. The results indicate that each of the methods is capable of evaluating the doughing and manipulation times of the unprocessed polymers. It is concluded that the Bohlin VOR Oscillating Rheometer is excellent for investigating the flow properties of denture base polymers but it cannot be recommended for a standards specification test because of the high cost. The penetrometer method has been shown to be superior to the current standards specification test and would be ideal for a packing plasticity standards test.

Denture Bases↗

Rheology of acrylic denture-base polymers.

The aim of this study was to investigate the changing rheological behavior of a denture-base polymer from mixing to setting. In addition, monomer evaporation and exothermic behavior of the mix were evaluated. The results show that the material behaves as a pseudoplastic fluid. It is shown that the viscosity increases at different rates with respect to lapsed time, and increases with higher temperature. Also, it is shown that polymerization and monomer evaporation both play a part in dough formation.

Acrylic Resins↗

[Immunoglobulin and complement levels in migraine].

There is circumstantial evidence to suggest that immune mechanisms are involved in the pathogenesis of migraine. Several workers have noted an increased incidence of allergy in patients with migraine and the disease has also been explained on an allergic basis. In this study the serum levels of IgG, IgA, IgM and C3 of 50 migraineurs are determined and the results were found to be increased realistically when compared by the control group. The results are compared by the literature.

Adolescent↗

[A comparative study to detect the HBsAg by the ELISA, RIA and PHA technics in patients with viral hepatitis].

The presence of HBsAg in the serum samples of patients with Acute Viral Hepatitis was detected by various methods, such as ELISA, RIA and PHA in order to determine the most sensitive technic. According to our results ELISA was found to be the most sensitive commercially available test for HBsAg. Among 92 patients with presumptive viral hepatitis HBsAg was detected in 36, 32 and 16 of them by ELISA, RIA and PHA tests respectively.

Enzyme-Linked Immunosorbent Assay↗

[Anaerobic bacteria isolated from appendices and appendicitis cases].

Anaerobic bacteria were isolated from 17 of 40 normal appendices and appendicitis cases in Ankara. In both cases gram positive, nonsporulating, and gram negative organisms were isolated. Gram positive cocci were only isolated from appendicitis cases. The bacteria isolated from appendicitis are usually like the anaerobic bacteria of the colon flora. All anaerobic bacteria in appendix flora can cause appendicitis in suitable conditions.

Anaerobiosis↗