RESUMO
Millenniums-old natural dye indigo--a "new" ambipolar organic semiconductor. Indigo shows balanced electron and hole mobilities of 1 × 10(-2) cm(2) V(-1) s(-1) and good stability against degradation in air. Inverters with gains of 105 in the first and 110 in the third quadrant are demonstrated. Fabricated entirely from natural and biodegradable compounds, these devices show the large potential of such materials for green organic electronics.
Assuntos
Produtos Biológicos/química , Corantes/química , Índigo Carmim/química , Semicondutores , Eletroquímica , Compostos de Estanho/químicaRESUMO
A 20-year-old female patient with familial adenomatous polyposis diagnosed on the occasion of the screening of her family, which had a history of three deaths due malignant colic polyposis, was submitted to total colectomy by laparoscopic technique. Though the histopathological examination performed on two polypi excised by endoscopic technique did not evidence signs of malignant shift, total colectomy was performed, observing the oncological principles. The intervention was uneventful and postoperative course uncomplicated, the patient being socially reintegrated after three weeks. Follow-up examinations performed up to 18 months after the operation showed a favourable evolution and no development in the size and number of polypi.
