101 documents found, page 1 of 11

Accurate determination of the temperature sensitivity of UV-Induced fiber bragg...

Over the past 18 months, we have performed hundreds of temperature characterizations of fiber Bragg gratings inscribed in different germanium-doped silica glass fibers. Under experimental conditions, the main conclusions are as follows: the temperature dependence of the “temperature gauge factor” or the normalized temperature sensitivity, KT, was found to be quadratic in the −50–200 °C range, while it may be co...

Geotecnia: Mecânica dos Solos, Mecânica das Rochas e Geologia de Engenharia

Antimicrobial resistance in the food chain: bridging knowledge gaps for effecti...

Antimicrobial resistance (AMR) poses a critical global public health threat, with the food chain serving as a significant transmission route connecting animals, environment, and humans. This review adopts a One Health perspective to analyze the key drivers of AMR dissemination across animal agriculture, aquaculture and food processing. We evaluate detection methodologies, contrasting the regulatory gold standar...

Selection of aptamers to target enterotoxigenic Escherichia coli infections

[Excerpt] Introduction Enterotoxigenic Escherichia coli (ETEC) is the leading cause of enteric infections in swine, resulting in significant costs for the industry (1 ). Initial adhesion to the intestinal epithelium relies on fimbriae, with F4 and F18 types being most associated with enteric infections. The traditional use of antibiotics for prevention and treatment is increasingly restricted due to rising anti...

Swine industry: validated PCR-based method for detecting enterotoxigenic Escher...

[Excerpt] Enterotoxigenic E. coli (ETEC) infections lead to significant costs for the swine industry worldwide. Bacterial fimbriae (F4/F5/F6/F18/F41) allow the adhesion of the bacteria to epithelial cells, and when both the immunological systems and the gut mic ro biota are poorly developed, ETEC colonizes and produces one or more enterotoxins (LT/ STa/ STb) that can have local and systemic effects. Therefore, ...

Normalized temperature sensitivity of fiber bragg gratings inscribed under diff...

In this paper we present results on the normalized temperature sensitivity of UV- and fs-induced fiber Bragg gratings in a singlemode fiber with ~4.7 mol% GeO2 and having an Ormocer coating. In the 1500-1600 nm wavelength range, the former shows an almost constant value of 6.165x10-6 K-1, whilst the fs-induced present some variation not related with the strength of the grating but probably due to induced birefr...

Advances in whole genome sequencing for foodborne pathogens: implications for c...

Foodborne outbreaks affecting millions of people worldwide are a significant and growing global health threat, exacerbated by the emergence of new and increasingly virulent foodborne pathogens. Traditional methods of detecting these outbreaks, including culture-based techniques, serotyping and molecular methods such as real-time PCR, are still widely used. However, these approaches often lack the precision and ...

Enhancing the Biorefinery of Chestnut Burrs, Part II: Influence of Pretreatment...

ABSTRACT: Agro-industrial chestnut waste derived from chestnut processing is usually discharged without further use. However, these residues are attractive due to their high-value composition, rich in sugars and lignin. Among these residues, chestnut burrs (CB) represent a promising feedstock for biorefinery applications aimed at maximizing the valorization of their main constituents. In this study, we propose ...

Can young swimmers guide their pace through the rating of perceived exertion?

Currently, the most widely used methods for evaluating internal training load rely on heart rate data as a tool to measure exercise intensity. However, there are limited practical methods available for evaluating training load in swimming. Therefore, assessing indirect methods such as the rating of perceived exertion, a psychophysiological tool to assess the subjective perception of effort during exercise, beco...

Assessing host-adaptation of new sequence types of livestock-associated methici...

The importance of animals as reservoirs of human pathogens is widely recognised, with livestock-associated methicillin-resistant Staphylococcus aureus (LA-MRSA) being consistently reported. This study presents a phenotypic and genotypic characterization of five MRSA isolates from raw bovine milk in northern Portugal, using culturomics and whole genome sequencing (WGS), to assess their potential risk for human i...