Publications by authors named "Ana Carolina DA Silva"
This study evaluated the effect of different occlusal surface finishes (glaze and silica glass infiltration) on surface characteristics and fatigue behavior of partially stabilized zirconia (PSZ) plates adhesively bonded onto epoxy resin discs. PSZ disc specimens (n = 15; Katana blocks STML, Kuraray Noritake Dental) were produced (Ø = 10 mm; thickness = 1.2 mm) and allocated into 3 groups: As sintered (S), silica glass infiltration (SGI), and glaze application (G).
View Article and Find Full Text PDFArticle Synopsis
- * Analysis of data from over 1 million forest plots and thousands of tree species shows that wood density varies significantly by latitude, being up to 30% denser in tropical forests compared to boreal forests, and is influenced mainly by temperature and soil moisture.
- * The research also finds that disturbances like human activity and fire alter wood density at local levels, affecting forest carbon stock estimates by up to 21%, emphasizing the importance of understanding environmental impacts on forest ecosystems.
Borosilicate glass was developed to enhance the mechanical behavior and smoothness of dental zirconia as an alternative to conventional glaze. This study assessed the mechanical and optical properties of 3 mol% yttria-stabilized tetragonal zirconia polycrystal (3Y-TZP) coated with borosilicate glass or a commercial glaze fired for an extended period of time. Disc-shaped 3Y-TZP zirconia specimens (Zpex, Tosoh) were sintered at 1550°C for 2 hours.
View Article and Find Full Text PDFGenetic selection has remarkably helped U.S. dairy farms to decrease their carbon footprint by more than doubling milk production per cow over time.
View Article and Find Full Text PDFObjective: This study evaluated the effect of an experimental borosilicate glass on the mechanical and optical behavior of 5Y-PSZ zirconia and comparing it to commercial glaze and as-sintered.
Methods: Disc-shaped specimens of a 5Y-PSZ (Zpex Smile) were prepared and sintered (1550 °C, 2 h). The zirconia discs were randomly divided according to the surface treatment: as-sintered (C), commercial glaze (G), and experimental borosilicate glass (SL).
Article Synopsis
- The study aimed to assess the mechanical strength and antimicrobial effectiveness of boron-containing coatings on translucent zirconia (5Y-PSZ) compared to other coatings like silver and glaze.
- Results showed that boron-containing coatings significantly reduced biofilm formation and metabolic activity of S. mutans, displaying improved antimicrobial properties over the other coatings.
- The boron coating also exhibited the highest flexural strength and mechanical reliability, while maintaining similar cytocompatibility to other coatings, making it a promising option for enhancing zirconia's performance.
This study aimed to evaluate the concomitant use of the nematophagous fungus Duddingtonia flagrans (AC001) and its protease-rich crude extract for the in vitro control of Panagrellus sp., Haemonchus spp., and Trichostrongylus spp.
View Article and Find Full Text PDFThis study assessed the impact of altitude, precipitation, and soil conditions on species richness (SR), phylogenetic diversity (PD), and functional diversity (FD) standardized effect sizes in subtropical Brazilian Atlantic Forest tree communities. We considered specific trait information (FDs) for FD, reflecting recent adaptive evolution, contrasting with deeper phylogenetic constraints in FD. Three functional traits (leaf area-LA, wood density-WD, and seed mass-SM) were examined for their response to these gradients.
View Article and Find Full Text PDFDue to massive energetic investments in woody support structures, trees are subject to unique physiological, mechanical, and ecological pressures not experienced by herbaceous plants. Despite a wealth of studies exploring trait relationships across the entire plant kingdom, the dominant traits underpinning these unique aspects of tree form and function remain unclear. Here, by considering 18 functional traits, encompassing leaf, seed, bark, wood, crown, and root characteristics, we quantify the multidimensional relationships in tree trait expression.
View Article and Find Full Text PDFThe present study evaluated the effect of glass application with and without silver-doped soda-lime glass on roughness, biofilm formation, cell viability and flexural strength of a zirconia. Samples of 3-YTZP (3 mol% yttria stabilized tetragonal zirconia polycrystals) were divided into: polished (P); glaze (G); glass infiltration (INF); 4% silver-doped soda-lime glass (Ag4); glass infiltration + 4% silver-doped soda-lime glass (INF-Ag4); 5% silver-doped soda-lime glass (Ag5); glass infiltration + 5% silver-doped soda-lime glass (INF-Ag5). Samples were submitted to the following analyses: roughness (Ra); free surface energy (FSE); colony-forming units count (log CFU/mL); scanning electron microscopy (SEM); cytotoxicity (MTT assay) and flexural strength.
View Article and Find Full Text PDFArticle Synopsis
- Biological invasion poses a significant risk to global biodiversity and ecosystem services, prompting an analysis of native versus non-native invasive tree species in Southern Brazil's subtropical mixed forest.
- The study utilized Principal Component Analysis to assess traits like wood density, leaf area, and specific leaf area, aiming to understand how invasive species fit into ecological niches.
- Although both native and non-native species share functional gradients, the success of invasions is influenced by specific traits and cannot be generalized across all species.
Article Synopsis
- The introduction of zirconia in dentistry was motivated by the need for better mechanical properties under high chewing forces, but it requires specific glazing for a natural appearance.
- An experimental glass was created using the sol-gel method to match zirconia's thermal expansion, serving as a more effective glazing material.
- The new glazing significantly improved the surface smoothness and mechanical strength of zirconia while decreasing the reliability of traditionally glazed zirconia, suggesting it's a better option for enhancing dental materials.
Article Synopsis
- Plant traits, which include various characteristics like morphology and physiology, play a crucial role in how plants interact with their environment and impact ecosystems, making them essential for research in areas like ecology, biodiversity, and environmental management.
- The TRY database, established in 2007, has become a vital resource for global plant trait data, promoting open access and enabling researchers to identify and fill data gaps for better ecological modeling.
- Although the TRY database provides extensive data, there are significant areas lacking consistent measurements, particularly for continuous traits that vary among individuals in their environments, presenting a major challenge that requires collaboration and coordinated efforts to address.
Objective: Osteosynthesis with intramedullary nailing is considered the method of choice to treat diaphyseal femur fractures in adults. The objective of this retrospective study was to evaluate the bone healing time and incidence of infection in patients with diaphyseal femur fractures treated surgically with retrograde and antegrade intramedullary nailing.
Methods: The medical records of 123 patients from two university hospitals dated 2011-2013 were evaluated, with 126 diaphyseal femur fractures having been found.
The aim of this study was determinate the best sonochemical time in order to obtain better bone characteristics when a bioactive material (Biogran) is used in the filling periimplantar defects. In this study, 32 rats were submitted to surgical proceedings to create a periimplantar defect that was filled with Biogran receiving different sonochemical times: 15 (G1), 30 (G2), 45 (G3) or 90 min (G4). The biomaterial was characterized through X-ray diffraction and scanning electron microscopy (SEM).
View Article and Find Full Text PDFMotivation: The BioTIME database contains raw data on species identities and abundances in ecological assemblages through time. These data enable users to calculate temporal trends in biodiversity within and amongst assemblages using a broad range of metrics. BioTIME is being developed as a community-led open-source database of biodiversity time series.
View Article and Find Full Text PDFWe aimed to investigate the taxonomic and functional variations of tree component of Araucaria Forest (AF) areas located along an altitudinal gradient (700, 900 and 1,600 m asl), in the southern region of Brazil. The functional traits determined were leaf area, specific leaf area, wood density, maximum potential height and dispersal syndromes and deciduousness. The data were analyzed through a functional and taxonomic dissimilarity dendrograms, community-weighted mean trait values, parametric and nonparametric tests, and Principal Component Analysis.
View Article and Find Full Text PDFThis study focused on the characterization and analysis of communities and infra-communities of metazoan parasites of Plagioscion squamosissimus caught in Promissão Reservoir in the Tietê River in Borborema (21°39'58"S, 49°8'49"W), state of São Paulo, Brazil. Fifty adult specimens caught by professional fishermen in March 2015 were necropsied. The fish presented an average standard length of 25.
View Article and Find Full Text PDFArticle Synopsis
- The study focuses on the rising interest in using vegetable oils, particularly those extracted from orange seeds, to address food waste and enhance health benefits.
- It characterizes oils from four types of oranges—Hamlin, Natal, Pera-rio, and Valencia—by evaluating their levels of carotenoids, phenolic compounds, tocopherols, and phytosterols.
- Results show that these oils have significant antioxidant activity and high levels of bioactive compounds, indicating their potential as specialty oils for dietary use.
Oils extracted from Cucurbitaceae seeds were characterised for their fatty acid and tocopherol compositions. In addition, some physicochemical characteristics, total phenolic contents and the radical-scavenging activities were determined. Oil content amounted to 23.
View Article and Find Full Text PDFArticle Synopsis
- This study investigated how methanol extracts from two types of mushrooms—Lentinus edodes and Agaricus blazei—affect the preservation of tocopherols (vitamin E compounds) in soybean oil during storage at high temperatures.
- The researchers tested several treatments: control (no antioxidants), TBHQ (synthetic antioxidant), BHT (another synthetic antioxidant), and the mushroom extracts, and evaluated their effectiveness over 15 days at 60 °C.
- Results showed that TBHQ took 13 days to increase oil mass by 0.5%, while A. blazei took 15 days, and tocopherol levels were highest in A. blazei (477.20 mg/kg) compared to TBHQ (
Glucocorticoid resistance is a major driver of therapeutic failure in T cell acute lymphoblastic leukemia (T-ALL). Here, we identify the AKT1 kinase as a major negative regulator of the NR3C1 glucocorticoid receptor protein activity driving glucocorticoid resistance in T-ALL. Mechanistically, AKT1 impairs glucocorticoid-induced gene expression by direct phosphorylation of NR3C1 at position S134 and blocking glucocorticoid-induced NR3C1 translocation to the nucleus.
View Article and Find Full Text PDFArticle Synopsis
- The cobia, a unique fish species from the Rachycentridae family, is being farmed in countries like the U.S., Mexico, and Brazil due to its beneficial traits.
- A study conducted in Ilhabela, Brazil, in winter 2011 involved examining 15 juvenile cobias for parasites, focusing on ectoparasites present on their bodies.
- Results showed that 2 out of the 15 fish were infected with the marine parasite Tuxophorus caligodes, marking the first documentation of this parasite in cobias in Brazil, resulting in a prevalence of 13.3%.