Here, we investigate the effects of the molecular weight and crystallinity of a polymer on the mechanical properties of PA6 staple fibers such as wear resistance and compaction. The experimental part involves the ageing of felt specimens in a wet pressing
simulator. The properties of the felt (air permeability), and the durability and branching of the staple fiber are examined as functions of the wear of a press felt and the crystallinity of see more the polymer. The changes that take place in the PA6 polymer are investigated using several techniques, and their connection with the properties of a new or aged press felt is discussed. The results indicate that the increase in molecular weight has a beneficial effect on the material’s mechanical properties, and our observations also support previous studies on the crystallinity and branching of PA6. (C) 2010 Wiley Periodicals, Inc. J Appl Polym Sci 120: 2222-2232, 2011″
“Metastatic breast cancer is rare in the female genital tract, and when present it more commonly tends to involve ovary or endometrium; uterine cervix is only occasionally involved. This condition poses differential diagnostic problems in the settings of clinical and pathological investigations.
An asymptomatic 78-year-old woman came to our S63845 in vitro attention in
the context of routine gynecological surveillance; clinical examination disclosed enlarged Cyclopamine uterine body and cervix. Our patient then underwent computed tomography and magnetic resonance imaging that outlined the possibility of cervical
cancer with parametrial involvement. Moreover, a suspect mass was found on the mammogram in the left breast. Breast surgical excision was performed, which revealed invasive breast carcinoma, while synchronous cervical biopsy discovered distant metastasis in the uterine cervix. On histological examination, both lesions showed non-cohesive architectural pattern consistent with lobular morphology; anyway, to rule out primary poorly differentiated cervical cancer, appropriate immunohistochemical panel was performed, which confirmed the mammary derivation of the tumor. Due to disseminate disease, the patient underwent multisystemic medical treatment including radiotherapy, chemotherapy and hormone therapy, and she is still alive at 30-month follow-up.
Genital tract metastases in patients with known breast carcinoma can present with abnormal vaginal bleeding, but they often are asymptomatic. Therefore, only strict gynecological surveillance of these patients can permit early detection of these secondary lesions. Aggressive treatment of isolated cervical metastasis should be performed when feasible; otherwise, systemic chemotherapy with taxane could be sufficient in increasing survival.