Synthesis, characterization and electrical properties of quaternary selenodiphosphates: AMP2SE6 with A = Cu, Ag and M = Bi, Sb

The new quaternary selenophosphate phases AMP2Se6 (A = Cu, Ag and M = Bi, Sb) were synthesized by ceramic methods at 1023 K. These phases were characterized by powder X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), energy dispersive X-ray analysis (EDX) and a.c. and d.c. electrical conductivity measurements. The phases all show values of electrical conductivity, σ, of about 10-4 Ω-1 cm-1 at 303 K and photoconductive effect. The conductivity is nearly five orders of magnitude larger than that of related phases. © 2003 Elsevier Science Ltd. All rights reserved

Periprocedural safety and technical outcomes of the new Silk Vista Baby flow diverter for the treatment of intracranial aneurysms: results from a multicenter experience.

The aim of our study was to assess the technical success and the safety of this new low-profile flow diverter Silk Vista Baby (SVB) by evaluating the intraprocedural and periprocedural complication rate. Clinical, procedural, and angiographic data were analyzed. 41 consecutive patients (28 women; age average 50.5 years) with 43 aneurysms were treated with SVB. Aneurysm sizes were classified by their maximum diameter, with an average size of 9.5 mm (range 2-30 mm). Thirty-four cases were unruptured. five aneurysms previously ruptured, had recurrence after the initial coiling. There were two ruptured cases. Aneurysms' locations were: M1 segment (five cases), M2 segment (three cases), M3 segment (one case), middle cerebral artery (MCA) bifurcation (six cases), carotid-T (two cases), anterior communicating artery/A1/A2 (11 cases), pericallosal artery (four cases), supraclinoid ICA (two cases), PCom (one case), V4 segment (three cases), PCA (three cases), SCA (one case), and PICA (one case). We had five intraprocedural complications which resolved without clinical consequences and three events postprocedural events. Initial occlusion rates were: eight aneurysms (18.6%) were completely occluded, five aneurysms (11.6%) showed near-complete occlusion, four cases (9.3%) showed incomplete filling, and 26 cases (60.4%) showed persisting filling. The mRS score at discharge from the hospital did not change from the admission mRS score. Our study demonstrated that the use of the new low-profile flow diverter, SVB device, for the treatment of intracranial aneurysms is feasible and technically safe

Incidence, Characteristics and Outcomes of Large Vessel Stroke in COVID-19 Cohort: An International Multicenter Study

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Proposta de um sistema de avaliação do desempenho para arranjos produtivos locais Purpose of a performance measurement system for an industrial cluster

Os Arranjos Produtivos Locais (APLs) são sistemas que podem ser utilizados para promover a cooperação empresarial, a inovação contínua e o desenvolvimento sustentável das Pequenas e Médias Empresas (PMEs). O processo de gestão de desempenho do APL é construído a partir do planejamento estratégico e com a implantação de ações coletivas de melhoria contínua. Também é necessário construir uma infraestrutura local e um ambiente que estimule a confiança e a cooperação dos membros do APL. A avaliação de desempenho é uma prática que fortalecerá a coordenação e execução das atividades de melhoria contínua do APL. Assim, o objetivo deste trabalho é propor um Sistema de Medição do Desempenho (SMD) que dê suporte ao processo de gestão de desempenho do APL. A proposta foi construída a partir das pesquisas de campo realizadas nos APLs de Ibitinga e Jaú. Os resultados demonstram que a medição de desempenho integrada a um processo sistemático de melhoria contínua promove a gestão colaborativa, aprimora o processo de tomada de decisão ou coordenação das ações planejadas pelas instituições, empresas e outros órgãos que fazem parte dos APLs. É um instrumento que pode ajudar a monitorar o desempenho das PMEs inseridas em uma rede de cooperação empresarial e direcionar as iniciativas coletivas ou ações de melhoria para as principais necessidades do APL.<br>Industrial clusters or cooperation network is an interesting alternative in promoting the sustainable development of Small and Medium Enterprises (SME's). The fundamental characteristics for managing the performance of clusters are the identification of the stakeholders, definitions of common strategies and objectives, development of collaborative improvement actions, design of a performance management system, organization of a support infrastructure, and promotion of social capital. The concepts of a performance management system can be of great value in managing collective efficiency and performance improvement of the companies of the cluster. The purpose of this article is to describe a model for the performance measurement and management of a cluster. In order to develop this study, a field research was carried out in two industrial clusters: Ibitinga, a textile industry cluster and Jau, a Lady's footwear cluster. The results show the applicability of performance measurement systems for the performance management of a cluster. It also helps to integrate the objectives of performance establishing actions, evaluating results promoting cooperation to improve the collective efficiency of a cluster

Neutrophil-Lymphocyte Ratio Is Associated With Poor Clinical Outcome After Mechanical Thrombectomy in Stroke in Patients With COVID-19

BACKGROUND: The neutrophil-lymphocyte ratio (NLR) is emerging as an important biomarker of acute physiologic stress in a myriad of medical conditions, and is a confirmed poor prognostic indicator in COVID-19. OBJECTIVE: We sought to describe the role of NLR in predicting poor outcome in COVID-19 patients undergoing mechanical thrombectomy for acute ischemic stroke. METHODS: We analyzed NLR in COVID-19 patients with large vessel occlusion (LVO) strokes enrolled into an international 12-center retrospective study of laboratory-confirmed COVID-19, consecutively admitted between March 1, 2020 and May 1, 2020. Increased NLR was defined as ≥7.2. Logistic regression models were generated. RESULTS: Incidence of LVO stroke was 38/6698 (.57%). Mean age of patients was 62 years (range 27-87), and mortality rate was 30%. Age, sex, and ethnicity were not predictive of mortality. Elevated NLR and poor vessel recanalization (Thrombolysis in Cerebral Infarction (TICI) score of 1 or 2a) synergistically predicted poor outcome (likelihood ratio 11.65, p  =  .003). Patients with NLR \u3e 7.2 were 6.8 times more likely to die (OR 6.8, CI95% 1.2-38.6, p  =  .03) and almost 8 times more likely to require prolonged invasive mechanical ventilation (OR 7.8, CI95% 1.2-52.4, p  =  .03). In a multivariate analysis, NLR \u3e 7.2 predicted poor outcome even when controlling for the effect of low TICI score on poor outcome (NLR p  =  .043, TICI p  =  .070). CONCLUSIONS: We show elevated NLR in LVO patients with COVID-19 portends significantly worse outcomes and increased mortality regardless of recanalization status. Severe neuro-inflammatory stress response related to COVID-19 may negate the potential benefits of successful thrombectomy