51 documents found, page 1 of 6

A short-term exposure to saxitoxin triggers a multitude of deleterious effects ...

Harmful algal blooms and the toxins produced during these events are a human and environmental health concern worldwide. Saxitoxin and its derivatives are potent natural aquatic neurotoxins produced by certain freshwater cyanobacteria and marine algae species during these bloom events. Saxitoxins effects on human health are well studied, however its effects on aquatic biota are still largely unexplored. This wo...

Changes in bryophyte functional composition during post-fire succession

Climate and land-use changes are altering fire regimes in many regions around the world. To date, most studies have focused on the effects of altered fire regimes on woody and herbaceous communities, while the mechanisms driving post-fire bryophyte succession remain poorly understood, particularly in Mediterranean-type ecosystems. Here, we examined changes in bryophyte functional composition along a post-fire c...

Changes in bryophyte functional composition during post-fire succession

Climate and land-use changes are altering fire regimes in many regions around the world. To date, most studies have focused on the effects of altered fire regimes on woody and herbaceous communities, while the mechanisms driving post-fire bryophyte succession remain poorly understood, particularly in Mediterranean-type ecosystems. Here, we examined changes in bryophyte functional composition along a post-fire c...

Mammogram retrieval system: Aggregating image classifiers for enhanced breast c...

Breast cancer remains a significant global health concern. This study presents an image retrieval system to aid specialists in the analysis of mammogram images. The system employs individual classifiers for eight dimensions: laterality, view, breast density, BI-RADS classification, masses, calcifications, distortions, and asymmetries. Four pre-trained networks, ResNet50, VGG16, InceptionV3, and InceptionResNetV...

Portuguese translation, cultural adaptation, and validation of the Person-Centr...

Aiming to translate, culturally adapt, and psychometrically evaluate the Person-centred Practice Inventory – Staff (PCPI-S) for Portuguese healthcare professionals, this methodological study was conducted sequentially in two phases. Phase I followed the 10-steps recommendations from the ISPOR taskforce for translation and cultural adaptation of patient reported outcome measures. Phase II comprised a quantitativ...

Desenvolvimento embrionário do peixe-zebra

Nos últimos anos o peixe-zebra (Danio rerio) tem-se tornado um modelo científico com interesse crescente em diversas áreas. Para além da facilidade em ser mantido e reproduzido em laboratório, o facto de ter um desenvolvimento embrionário rápido, elevada fecundidade e de os seus embriões serem grandes, transparentes e não mucilaginosos propulsionaram o seu uso em estudos de embriologia. O desenvolvimento embrio...

Desenvolvimento embrionário do peixe-zebra

Nos últimos anos o peixe-zebra (Danio rerio) tem-se tornado um modelo científico com interesse crescente em diversas áreas. Para além da facilidade em ser mantido e reproduzido em laboratório, o facto de ter um desenvolvimento embrionário rápido, elevada fecundidade e de os seus embriões serem grandes, transparentes e não mucilaginosos propulsionaram o seu uso em estudos de embriologia. O desenvolvimento embrio...

Acetylcholinesterase (AChE) activity in embryos of zebrafish

Study on Data Partition for Delimitation of Masses in Mammography

Mammography is the primary medical imaging method used for routine screening and early detection of breast cancer in women. However, the process of manually inspecting, detecting, and delimiting the tumoral massess in 2D images is a very time-consuming task, subject to human errors due to fatigue. Therefore, integrated computer-aided detection systems have been proposed, based on modern computer vision and mach...

Tetracycline-Resistant Bacteria Selected from Water and Zebrafish after Antibio...

The emergence of antibiotic-resistant pathogens due to worldwide antibiotic use is raising concern in several settings, including aquaculture. In this work, the selection of antibiotic-resistant bacteria (ARB) and antibiotic resistance genes (ARGs) was evaluated after exposure of zebrafish to oxytetracycline (OTC) for two months, followed by a recovery period. The selection of ARB in water and fish was determin...