abstract background: abnormal uterine bleeding (aub) is one of the most common complains in women of any age seeking gynecologic health care and needs early diagnosis and proper management due to its impacts on the quality of life. this study was conducted to investigate the cut-off value of endometrial thickness (et) by trans-vaginal ultra-sonography (tvus) and evaluate its accuracy in the dia...

conclusions hbv in children due to vaccination failure was resulted from vertical transmission. hbv pre-s/s gene mutations were prevalent and could occur before or after vaccination. therefore, simply analyzing mutation frequency of hbv gene was not of value. to advance blocking hbv vertical transmission, future studies should focus on specific mutation sites, potentially associated with vaccin...

1 Department of Biochemistry, Faculty of Pharmacy, University of Porto, Rua de Jorge Viterbo Ferreira 228, 4050-313 Porto, Portugal 2 Institute for Molecular and Cell Biology (IBMC), University of Porto, 4150-180 Porto, Portugal 3 Faculty of Medicine, University of Porto, 4200-319 Porto, Portugal 4 Center for Research in Health Technologies and Information Systems (CINTESIS), Faculty of Medicin...

We introduce a notion of pre-alternative algebra which may be seen as an alternative algebra whose product can be decomposed into two pieces which are compatible in a certain way. It is also the “alternative” analogue of a dendriform dialgebra or a pre-Lie algebra. The left and right multiplication operators of a pre-alternative algebra give a bimodule structure of the associated alternative al...