39 research outputs found
Occupational inequalities in workplace relationships
https://observatorio-das-desigualdades.com/publicacoes/working-papers-od-2/Neste artigo, analisamos o efeito da variĂĄvel ocupação na dimensĂŁo relacional do trabalho. Com base em dados do InquĂ©rito Europeu Ă s CondiçÔes de Trabalho, propomos uma anĂĄlise exploratĂłria que permita alargar a discussĂŁo sobre as desigualdades ocupacionais Ă s esferas nĂŁo materiais do trabalho, mais concretamente, Ă s relaçÔes de apoio e cooperação que se estabelecem no exercĂcio da atividade profissional. Discutimos, tambĂ©m, o possĂvel efeito que a insegurança do emprego pode ter no desenvolvimento de relaçÔes interpessoais estĂĄveis e cooperativas no trabalho.This article analyses the effect of the variable occupation in workplace relationships. Through an exploratory analysis of data from the European Working Conditions Survey, the article proposes a broader discussion of occupational inequalities, considering its implications on the non-material dimensions of work. The analysis focuses workplace relationships, and more specifically, daily social support and cooperation between colleagues. The possible effect of job insecurity for the development of cooperative and stable relationships at work is also discussed
Luminescence lifetime imaging of three-dimensional biological objects
ABSTRACT
A major focus of current biological studies is to fill the knowledge gaps between cell, tissue and organism scales. To this end, a wide array of contemporary optical analytical tools enable multiparameter quantitative imaging of live and fixed cells, three-dimensional (3D) systems, tissues, organs and organisms in the context of their complex spatiotemporal biological and molecular features. In particular, the modalities of luminescence lifetime imaging, comprising fluorescence lifetime imaging (FLI) and phosphorescence lifetime imaging microscopy (PLIM), in synergy with Förster resonance energy transfer (FRET) assays, provide a wealth of information. On the application side, the luminescence lifetime of endogenous molecules inside cells and tissues, overexpressed fluorescent protein fusion biosensor constructs or probes delivered externally provide molecular insights at multiple scales into proteinâprotein interaction networks, cellular metabolism, dynamics of molecular oxygen and hypoxia, physiologically important ions, and other physical and physiological parameters. Luminescence lifetime imaging offers a unique window into the physiological and structural environment of cells and tissues, enabling a new level of functional and molecular analysis in addition to providing 3D spatially resolved and longitudinal measurements that can range from microscopic to macroscopic scale. We provide an overview of luminescence lifetime imaging and summarize key biological applications from cells and tissues to organisms.</jats:p
Excessive delay in nutrient release by controlled-release fertilizers can reduce chestnut yield
Farmers are increasing the use of fertilizers in chestnut, the only cash crop produced in
the mountainous areas of northeastern Portugal. This calls for more studies to guide them towards
a more ecological intensification. The effects of three controlled-release fertilizers, two that release
nutrients over three months (BoskGrow 20:05:20_3m, Exactyon 18:05:13_3m) and one over six months
(Exactyon 18:05:12_6m), and an organic amendment authorized for organic farming (Humix 12:03:05)
were compared with an untreated control during a three-year field trial (2019â2021). BoskGrow
20:05:20_3m, Exactyon 18:05:13_3m and Humix 12:03:05 gave significantly higher nut yields (90.6
to 97.0 kg treeâ1, average 2019 + 2021) than Exactyon 18:05:12_6m (66.3 kg treeâ1) and the control
(69.5 kg treeâ1). Leaf concentrations of nitrogen and potassium tended to be higher in the BoskGrow
20:05:20_3m and Exactyon 18:05:13_3m treatments, and they were stated as the most important causes
in the establishment of the two productive groups. Humix 12:03:05, although less concentrated in
nutrients, led to a chestnut yield at the level of the most productive treatments, possibly due to the
multiple positive effects of organic matter on soil and plants. Under the conditions of this experiment,
where rainfall is low in the summer, fertilizers whose nutrient release takes a long time, such as
Exactyon 18:05:12_6m, seem not to be a good fertilization option due to reduced nutrient uptake and
increased levels of soil inorganic nitrogen at the end of the growing season. Humix 12:03:05 emerged
as a possible solution for organic producers.This work was funded by the Operational Group âEGISâEstratĂ©gias de GestĂŁo Integrada
do Solo e da Ăgua em EspĂ©cies Produtoras de Frutos Secosâ, funded by PT2020 and EAFRD (European
Agricultural Fund for Rural Development). The authors are grateful to the Foundation for Science
and Technology (FCT, Portugal) and FEDER under Programme PT2020 for the financial support to
CIMO (UIDB/00690/2020) and CITAB (UIDB/04033/2020).info:eu-repo/semantics/publishedVersio
Caminhos para o empreendedorismo: uma tipologia de acesso Ă atividade empreendedora
Este artigo tem por objetivo central analisar os fatores sociais que, de forma articulada, explicam a decisĂŁo de uma pessoa se tornar empreendedora. Para o efeito Ă© mobilizada informação recolhida no Ăąmbito de um projeto de investigação realizado em Portugal direcionado para o estudo dos padrĂ”es, contextos e experiĂȘncias de empreendedorismo. Com base na componente qualitativa da pesquisa, relativa Ă anĂĄlise de entrevistas aprofundadas a mulheres e homens empreendedores sobre os seus trajetos individuais, foi elaborada uma tipologia de acesso Ă empresarialidade. Esta categorização expressa diferentes combinaçÔes de fatores, dando particular destaque aos efeitos que o gĂ©nero e as qualificaçÔes tĂȘm na opção de trabalhar por conta prĂłpria, sem deixar de enfatizar a interligação com as inserçÔes socioeconĂŽmicas, as redes interpessoais e as relaçÔes familiares
Influence of water and nutrients on cork oak radial growth â looking for an efficient fertirrigation regime
Abstract
The widespread cork oak (Quercus suber L.) mortality and reduced afforestation /regeneration are
causing an overall reduction in cork production. To enhance treesâ growth and vitality, afforestation techniques using fertirrigation were tested. The main objective was the promotion of treesâ
growth on new dense plantations using minimum water requirements until reaching productive
forests. The experimental plot â Irricork â was installed in 2017 in a â1 ha stand with 14 yearsâ
age cork oaks summer-fertirrigated since plantation. Four fertirrigation treatments were applied
during fertirrigation campaigns. Radial growth, meteorological parameters and fertirrigation
volume were measured every 15â30 days over four years. It was observed that weather, tree size,
debarking and treesâ intra-competition had a significant effect on radial increments. Fertirrigation
significantly enhanced growth during summer drought and decoupled increments from air vapor
pressure deficit constraints. There was a linear relationship between treesâ radial increments and
fertirrigation volume up to 140 m3 weekâ1. Above this value, increments were smoother. In conclusion, summer fertirrigation of 140 m3 weekâ1 efficiently enhanced the radial growth of trees
with 50â75 circumference at breast height, under the particular edaphoclimatic conditions of
the stand. This study showed to be, therefore, promising in the use of efficient fertirrigation the
enhance cork oaksâ radial growth
Influence of water and nutrients on cork oak radial growth â looking for an efficient fertirrigation regime
The widespread cork oak (Quercus suber L.) mortality and reduced afforestation /regeneration are causing an overall reduction in cork production. To enhance treesâ growth and vitality, afforestation techniques using fertirrigation were tested. The main objective was the promotion of treesâ growth on new dense plantations using minimum water requirements until reaching productive forests. The experimental plot â Irricork â was installed in 2017 in a â1 ha stand with 14 yearsâ age cork oaks summer-fertirrigated since plantation. Four fertirrigation treatments were applied during fertirrigation campaigns. Radial growth, meteorological parameters and fertirrigation volume were measured every 15â30 days over four years. It was observed that weather, tree size, debarking and treesâ intra-competition had a significant effect on radial increments. Fertirrigation significantly enhanced growth during summer drought and decoupled increments from air vapor pressure deficit constraints. There was a linear relationship between treesâ radial increments and fertirrigation volume up to 140 m3 weekâ1. Above this value, increments were smoother. In conclusion, summer fertirrigation of 140 m3 weekâ1 efficiently enhanced the radial growth of trees with 50â75 circumference at breast height, under the particular edaphoclimatic conditions of the stand. This study showed to be, therefore, promising in the use of efficient fertirrigation the enhance cork oaksâ radial growth
Portuguese propolis: a source of valuable bioactivities
To FEDER/COMPETE/POCIâ Operational Competitiveness and Internationalization
Programme, under Project POCI-01-0145-FEDER-006958 and FCT - Portuguese Foundation for Science and
Technology, under the project UID/AGR/04033/2013
Improved imputation of low-frequency and rare variants using the UK10K haplotype reference panel
Imputing genotypes from reference panels created by whole-genome sequencing (WGS) provides a cost-effective strategy for augmenting the single-nucleotide polymorphism (SNP) content of genome-wide arrays. The UK10K Cohorts project has generated a data set of 3,781 whole genomes sequenced at low depth (average 7x), aiming to exhaustively characterize genetic variation down to 0.1% minor allele frequency in the British population. Here we demonstrate the value of this resource for improving imputation accuracy at rare and low-frequency variants in both a UK and an Italian population. We show that large increases in imputation accuracy can be achieved by re-phasing WGS reference panels after initial genotype calling. We also present a method for combining WGS panels to improve variant coverage and downstream imputation accuracy, which we illustrate by integrating 7,562 WGS haplotypes from the UK10K project with 2,184 haplotypes from the 1000 Genomes Project. Finally, we introduce a novel approximation that maintains speed without sacrificing imputation accuracy for rare variants