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DPPC monolayers as simple models of biological membranes for studies of interactions with perfluorinated compounds

100%
Matyszewska D., Bilewicz R.
|
2008
|
vol. 63
201-210
EN
Langmuir monolayers of 1,2-dipalmitoyl-sn-glycero-3-phosphocholine (DPPC) formed at the air-water interface were used as simple models of biological membranes to study interactions with two selected perfluorinated compounds: perfluorooctanoic acid (PFOA) and perfluorooctanesulphonic acid (PFOS). The presence of those common pollutants in the subphase led to the formation of more fluidic monolayer possessing different surface and barrier properties. The observed increase in the area per molecule in the Langmuir monolayer spread at the air-water interface was attributed to the incorporation of perfluorinated compounds into the layer. Moreover, perfluorooctanesulphonic acid was found to interact with DPPC monolayers transferred onto the electrode surface. Exposure of DPPC modified electrode to PFOS solution led to changes in electrode capacitance and in the efficiency of electron transfer rate observed for selected electroactive probes added to the solution.
2
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Mięsak włóknisto-histiocytarny krtani

81%
Bilewicz R., Wierzchowska M., Burduk P. K., Szukalski J.
Polish Journal of Otolaryngology
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2007
|
vol. 61
|
issue 3
325-328
EN
Introduction. Malignant fibrohistiocytoma is one of the rare neoplasms of the larynx. It has nonepithelial origin. The most common sites of the neoplasm are: limbs, trunk and retroperitoneal space. Other localizations within head and neck are very rare. There are 5 histologic types. The most common is pleomorphic type. It is built of histiocytes, fibroblasts and multinuclear giant cells. An examination of the neoplasms consists of microscopic and immunohistologic examination with identification specific tissue markers and intermediate filaments of proteins. Treatment methods of the neoplasms are radical surgery, radiotherapy, chemiotherapy and associate methods of therapy. Prognosis is very bad. Material and methodic. We present 71 years old man with croak for four mounths. The tumor of the larynx was examined in laryngoscopy. Biopsy of the tumor confirmed malignant fibrohistiocytoma. Laser surgery (chordectomy) was used to treatment this tumor without radiotherapy. Results. One year observation of the patient didn’t show recurrence of neoplasm, but he had only croak. Conclusions. Malignant fibrohistiocytoma of the larynx doesn’t differ from other malignant neoplasms of the larynx. Malignant fibrohistiocytoma of the larynx is very rare malignant neoplasms of the larynx.
3
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Malignant fibrohistiocytoma of the larynx

81%
Bilewicz R., Wierzchowska M., K B. P., Szukalski J.
Otolaryngologia Polska
|
2007
|
vol. 61(3)
325-328
EN
Introduction. Malignant fibrohistiocytoma is one of the rare neoplasms of the larynx. It has nonepithelial origin. The most common sites of the neoplasm are: limbs, trunk and retroperitoneal space. Other localizations within head and neck are very rare. There are 5 histologic types. The most common is pleomorphic type. It is built of histiocytes, fibroblasts and multinuclear giant cells. An examination of the neoplasms consists of microscopic and immunohistologic examination with identification specific tissue markers and intermediate filaments of proteins. Treatment methods of the neoplasms are radical surgery, radiotherapy, chemiotherapy and associate methods of therapy. Prognosis is very bad. Material and methodic. We present 71 years old man with croak for four mounths. The tumor of the larynx was examined in laryngoscopy. Biopsy of the tumor confirmed malignant fibrohistiocytoma. Laser surgery (chordectomy) was used to treatment this tumor without radiotherapy. Results. One year observation of the patient didn’t show recurrence of neoplasm, but he had only croak. Conclusions. Malignant fibrohistiocytoma of the larynx doesn’t differ from other malignant neoplasms of the larynx. Malignant fibrohistiocytoma of the larynx is very rare malignant neoplasms of the larynx.
4
Publication available in full text mode
Content available

Mięsak włóknisto-histiocytarny krtani

81%
Bilewicz R., Wierzchowska M., K B. P., Szukalski J.
Otolaryngologia Polska
|
2007
|
vol. 61(3)
325-328
PL
Introduction. Malignant fibrohistiocytoma is one of the rare neoplasms of the larynx. It has nonepithelial origin. The most common sites of the neoplasm are: limbs, trunk and retroperitoneal space. Other localizations within head and neck are very rare. There are 5 histologic types. The most common is pleomorphic type. It is built of histiocytes, fibroblasts and multinuclear giant cells. An examination of the neoplasms consists of microscopic and immunohistologic examination with identification specific tissue markers and intermediate filaments of proteins. Treatment methods of the neoplasms are radical surgery, radiotherapy, chemiotherapy and associate methods of therapy. Prognosis is very bad. Material and methodic. We present 71 years old man with croak for four mounths. The tumor of the larynx was examined in laryngoscopy. Biopsy of the tumor confirmed malignant fibrohistiocytoma. Laser surgery (chordectomy) was used to treatment this tumor without radiotherapy. Results. One year observation of the patient didn’t show recurrence of neoplasm, but he had only croak. Conclusions. Malignant fibrohistiocytoma of the larynx doesn’t differ from other malignant neoplasms of the larynx. Malignant fibrohistiocytoma of the larynx is very rare malignant neoplasms of the larynx.
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