16,005 research outputs found
The importance of target audiences in the design of training actions
This paper describes the process of definition, conceptualization and implementation of a business course addressed for logistic and industrial managers. This course was designed using a blended methodology, with training in classroom, visits to enterprises and self- study, supported by an eLearning platform. The aim of this work is to create an opportunity to reflect about the decisions and strategies implemented and point future developments
CVD of CrO2 Thin Films: Influence of the Deposition Parameters on their Structural and Magnetic Properties
This work reports on the synthesis of CrO2 thin films by atmospheric pressure
CVD using chromium trioxide (CrO3) and oxygen. Highly oriented (100) CrO2 films
containing highly oriented (0001) Cr2O3 were grown onto Al2O3(0001) substrates.
Films display a sharp magnetic transition at 375 K and a saturation
magnetization of 1.92 Bohr magnetons per f.u., close to the bulk value of 2
Bohr magnetons per f.u. for the CrO2.
Keywords: Chromium dioxide (CrO2), Atmospheric pressure CVD, Spintronics.Comment: 5 pages, 6 figure
DoE to improve supercoiled p53-pDNA purification by O-phospho-L-tyrosine chromatography
P53 is implicated in various cellular functions and several studies have shown that transfection of cancer cells
with wild-type p53-expressing plasmids could directly drive cells into growth arrest and/or apoptosis. In the
present work, the 6.07 kbp pcDNA3-FLAG-p53 plasmid, which encodes the p53 tumor suppressor, was produced
and recovered from a recombinant cell culture of Escherichia coli DH5α. Following plasmid biosynthesis, the O phospho-L-tyrosine chromatographic matrix was explored to purify the supercoiled p53-encoding plasmid. In
order to quickly determine the optimal chromatographic performance and to obtain the required purity degree,
maximizing the recovery yield of the supercoiled plasmid DNA, the Composite Central Face design was applied.
The model revealed to be statistically significant (p-value < 0.05), with coefficient of determination of 0.9434
for the recovery yield and 0.9581 for purity and the central point was successfully validated. After the chro matographic process optimization by using the design of experiments tool, 49.7% of the supercoiled p53-en coding plasmid was recovered with 98.2% of purity, when a decreasing ammonium sulphate gradient was ap plied. The dynamic binding capacity of the O-phospho-L-tyrosine agarose column was 0.35 ± 0.02 mg pDNA/
mL matrix at 50% of the breakthrough. Finally, the purified sample was analysed to assess the content of en dotoxins, proteins and genomic DNA, showing that all these impurity levels were below the recommendations of
the regulatory agenciesinfo:eu-repo/semantics/publishedVersio
Searching for solar siblings among the HARPS data
The search for the solar siblings has been particularly fruitful in the last
few years. Until now, there are four plausible candidates pointed out in the
literature: HIP21158, HIP87382, HIP47399, and HIP92831. In this study we
conduct a search for solar siblings among the HARPS high-resolution FGK dwarfs
sample, which includes precise chemical abundances and kinematics for 1111
stars. Using a new approach based on chemical abundance trends with the
condensation temperature, kinematics, and ages we found one (additional)
potential solar sibling candidate: HIP97507.Comment: 4 pages, 2 figures, 1 table. Accepted in A&
MPO-ANCA-Associated Necrotizing Glomerulonephritis in Rheumatoid Arthritis; a Case Report and Review of Literature
BACKGROUND: Renal involvement in rheumatoid arthritis (RA) is common and has a negative impact on patient survival. Only few cases have been reported of necrotizing glomerulonephritis (GN) associated with myeloperoxidase anti-neutrophil cytoplasmic antibody (MPO-ANCA) in patients with RA.
CASE PRESENTATION: We report a patient with RA who developed a necrotizing GN associated with ANCA-MPO, treated with rituximab (RTX). A 55-year-old man with a 27-year history of RA under secukinumab was referred to our nephrology clinic with worsening renal function associated with microhematuria and proteinuria. Our laboratory evaluation showed hypocomplementemia and positive titers for MPO-ANCA (615 U/mL). A renal biopsy demonstrated pauci-immune necrotizing GN. The patient was treated with 3 consecutive pulses of methylprednisolone followed by oral prednisolone (1 mg/Kg) and rituximab (1000 mg, repeated 14 days later). After a 10-month follow-up, the arthritis remains well-controlled, renal function stabilized, proteinuria improved and MPO-ANCA titer normalized (6.3 U/mL).
CONCLUSIONS: Necrotizing GN is a rare but a serious condition and an early diagnosis is essential to treatment. This is the first case of necrotizing GN (without extra-renal manifestations of vasculitis) in a patient with active RA, successfully treated with RTX.info:eu-repo/semantics/publishedVersio
A Violência no Local de Trabalho em Instituições de Saúde: Um Estudo Monocêntrico sobre Causas, Consequências e Estratégias de Prevenção
Introduction: Workplace violence is one of the main risk factors in the professional world. Healthcare workers are at higher risk when
compared to other sectors. Our study aimed to characterize physical and verbal violence in a public hospital and to define occupational
health prevention and surveillance strategies.
Material and Methods: Single center observational cross-sectional study, carried amongst healthcare workers in a public hospital in
Lisbon. A qualitative survey was carried out through six in-depth interviews. A quantitative survey was carried through questionnaires
delivered to 32 workers. A significance level of 5% was accepted in the assessment of statistical differences. The Mann-Whitney test
and the Fisher’s exact test were used to calculate p values.
Results: The main results are: (1) 41 violence incidents were reported in the quantitative phase; (2) 5/21 [23.81%] victims notified
the incident to the occupational health department; (3) 18/21 [85.71%] victims reported a permanent state of hypervigilance; (4) 22/28
[78.57%] participants self-reported poor or no familiarity with internal reporting procedures; (5) 24/28 [85.71%] participants believed it
is possible to minimize workplace violence.
Discussion: Workplace violence is favored by unrestricted access to working areas, absence of security guards and police officers
or scarce intervention. The low notification rate contributes to organizational lack of action. The state of hypervigilance reported in our
study reflects the negative effects of threatening occupational stressors on mental health.
Conclusion: Our results show that workplace violence is a relevant risk factor that significantly impacts workers’ health in a noxious
manner, deserving a tailored occupational health approach whose priority areas and strategies have been determined.Introdução: A violência no local de trabalho é um dos principais fatores de risco no mundo do trabalho. Os trabalhadores da saúde
apresentam um risco superior. O nosso estudo teve como objetivo caracterizar a violência física e verbal num hospital público e definir
estratégias de prevenção e vigilância em saúde ocupacional.
Material e Métodos: Estudo observacional transversal monocêntrico, conduzido num hospital público em Lisboa com trabalhadores
da saúde. Foi realizado um inquérito qualitativo com entrevistas em profundidade a seis trabalhadores e um inquérito quantitativo
com questionários a 32 trabalhadores. Aceitou-se um nível de significância de 5% na avaliação das diferenças estatísticas. O teste de
Mann-Whitney e o teste exato de Fisher foram usados para calcular os valores de p.
Resultados: Os principais resultados são: (1) 41 episódios reportados na fase quantitativa; (2) 5/21 [23,81%] vítimas notificaram o incidente; (3) 18/21 [85.71%] vítimas reportaram estados de hipervigilância permanente; (4) 22/28 [78,57%] participantes não conheciam
ou conheciam mal os procedimentos de notificação; (5) 24/28 [85,71%] consideravam possível minimizar o problema.
Discussão: A violência é favorecida pelo acesso livre às zonas de trabalho, ausência de agentes de segurança e polícia ou falta da
respetiva intervenção. A baixa notificação contribui para a ausência de medidas organizacionais. O estado de hipervigilância relatado
reflete o efeito prejudicial da exposição a fontes de stress e ameaça.
Conclusão: A violência no local de trabalho é um fator de risco relevante, com impacto negativo na saúde dos trabalhadores e merece
uma abordagem individualizada no âmbito da saúde ocupacional, cujas áreas e estratégias prioritárias foram definidas neste estudo.
Palavras-chave: Fatores de Risco Profissionais; Prevenção; Saúde Ocupacional; Trabalhadores da Saúde; Violência no Local de trabalho.info:eu-repo/semantics/publishedVersio
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