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Liquid epoxide resins, solvents and solvent-modified epoxide resins, as well as hardeners for epoxide resins, appear to be skin and mucosa irritants of different intensity and possibly have allergenic properties. Therefore, it is required that the employees are qualified and industrial safety rules are followed when these substances are in use in the manufacturing process. Our study evaluated the state of dentition and analysed the loss of teeth in the workers of the laminate and composite materials department of aircraft factory. The research has been carried out in a group of 114 workers, which consisted of 88 men and 26 women 20 to 61 years old. The control group consisted of 41 workers of the administration department in the aircraft factory who did not have any contact with chemical compounds. The workers in the studied group are characterised as having an unsatisfactory state of dentition, as shown by the high rate of lost teeth (74%). Statistically significant difference between the studied group and the control was found when the relationship between the number of lost molar teeth in women in the studied group and those in the control group is taken into consideration, a statistically significant difference appears to refer to teeth 46 and 27. The same statistically important correlation between men in the control and studied groups concerns teeth 16. The research data shows that incisor teeth are the least frequently extracted teeth in the whole population studied. Statistically significant differences can be noted for teeth 21 and 23 between the women in the control group and those in the studied one. Future studies are necessary to assess the potential relationship between the loss of teeth among workers of the department of laminate and composite materials of aircraft factory and their workplace.
Eighteen Wistar rats were exposed for 24 d to an electromagnetic field and water. The tongue, mucous membrane of the cheek wall, and the parotid gland were examined histopathologically. The examination showed slight differences in the histological structure of the tongue muscles and mucous membrane of the cheek wall between the experimental and control groups. In the tissues of the tongue from experimental animals, extensive extravasations in the tunica muscularis were observed. In sections of the parotid gland of these animals, slight lymphoid cell infiltrations, and masses of various consistency and colour, from yellow to brown, were noted in the lumen of the parotid ducts.
The effects of different doses of Ukrain and/or strontium on the rat tooth intertubular dentine were analysed in cuts perpendicular to the dentinal tubes. The tooth surface and tooth cross-sections morphology and roughness were investigated with atomic force microscopy. The surface morphology and roughness of the dentine from seven groups of animals was examined with tapping-mode atomic force microscopy. The cross section surface of intertubular dentine was analysed by roughness and fractal parameters. Histograms were prepared for the typical samples from all the analysed groups of teeth. Dentine cross section surfaces showed significant and distinguishable differences between nano structures of the normal control rat teeth and those from animals administered with Ukrain and strontium.
The effects of different doses of Ukrain and/or strontium on the rat teeth intertubular dentine were analysed in cuts perpendicular to the dentinal tubes. To the dentine elemental analysis, scanning electron microscopy (SEM) equipped in XRF (X-ray fluorescence) microprobe was used. Strontium concentration increased from 4.1% in the control group to 5.0% and 6.3% for the groups administered with strontium and strontium together with Ukrain. At the same time, a lowering of calcium concentration was observed. The rat dentine elemental composition was markedly altered after the administration of Ukrain and strontium. It was shown that strontium with Ukrain decreased the demineralisation of the dentine.
Modifying effect of Solcoseryl upon the late postirradiation damage of the lungs expressed as the number of apoptotic cells per 1mm² of the pulmonary tissue was investigated in rats. The number of labelled apoptotic cells in situ was determined by TUNEL method under light microscope connected to computer imaging (Lucia software). The results of the experiment demonstrated statistically significant reduction in the number of apoptotic cells in the pulmonary tissue in the group of rats irradiated with simultaneous administration of Solcoseryl in comparison to the group of animals irradiated without Solcoseryl treatment. The results indicate that Solcoseryl exhibits radioprotective activity upon the respiratory epithelium due to the reduction of the apoptotic cell number.
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