Solid-state carbon-based textile supercapacitors for energy storage applications

In this work, carbon-based conducting electrodes based on two different types of carbon nanofibers (CNF) have been produced by the dip and dry coating method onto cotton substrates. Furthermore, activated carbon (Norit A Supra Eur) and manganese oxide (MnO2) have been subsequenlty added to the CNF-based dip-coated cotton fabrics electrodes and asymmetric supercapacitors have been constructed and tested with the focus of obtaining devices with increased capacitive performance. In particular, the carbon-based active layer was prepared by spreading on the CNF-based electrodes a slurry containing the activated carbon (AC) material, graphite fibres, polyvinylidene difluoride (PVDF) as binder and N,N dimethylacetamide (DMA) solvent, whereas the MnO2 based active layer was prepared by spreading on the CNF-based textile electrodes a slurry formed by MnO2, carbon black, graphite fibers, PVDF and DMA. A solution of 1M Na2SO4 impregnated in porous paper separator (Nippon Kodoshi Corportion, Japan) was employed as neutral aqueous electrolyte. The supercapacitors were electrochemical investigated by cyclic voltammetry (CV), galvanostatic charge/discharge (GCD) and electrochemical impedance spectroscopy (EIS). The results indicated that with this particular combination of carbon and manganese oxide active layers on CNF-based cotton fabrics it was possible to obtain specific capacitance of 100 F/g and a high specific energy density of 10 Wh/kg.This work was partly financed by FEDER funds through the Competitivity Factors Operational Programme - COMPETE and by national funds through FCT – Foundation for Science and Technology within the scope of the project POCI-01-0145-FEDER-007136. A. J. Paleo acknowledges the support of COST Action CA15107- Multi-Functional Nano-Carbon Composite Materials Network (MultiComp) by means of a short term scientific mission (STSM).info:eu-repo/semantics/publishedVersio

Projecto para o Teste e Depuração com Base nas Arquitecturas IEEE 1149.1 e 1149.4

A infraestrutura Boundary Scan Test (BST), definida na norma IEEE 1149.1, tem sido tradicionalmente utilizada para o teste estrutural de Cartas de Circuito Impresso (CCI) na fase de produção [1, 2]. O seu aparecimento deveu-se, entre outras razões, à crescente dificuldade das tradicionais tecnologias de teste de CCI (o teste in-circuit e o teste funcional) em lidar com os novos tipos de encapsulamento de Circuitos Integrados (CI) e com a sua crescente complexidade. A utilização de CI de montagem superficial veio reduzir o distanciamento entre os pinos e permitir a montagem de componentes em ambos os lados da CCI, dificultando assim o acesso físico requerido pelo teste incircuit. A crescente complexidade veio por sua vez dificultar a propagação de valores no interior da CCI, diminuindo assim a qualidade do teste funcionalinfo:eu-repo/semantics/publishedVersio

Carbon and MnO₂ materials on carbon nanofibers cotton textile substrate for hybrid solid-state supercapacitors

This work is focused on the design and development of hybrid solid-state energy storage devices with high capacitive performance. In particular, the work includes, the preparation of carbon composite electrodes based on a carbon nanofibers (CNF) supported on a cotton fabric. The coating of CNF to the cotton cloth is obtained by the dip and dry method. On these so-obtained composite substrates, further layers of activated carbon (Norit A Supra Eur) and manganese oxide (MnO2) material have been subsequenlty deposited to enhance the electrochemical performances of negative and positive electrodes, respectively. The preparation of carbon-based active layers comprises the spreading on the negative CNF-substrate of a slurry containing the activated carbon (AC) material, graphite fibres and polyvinylidene difluoride (PVDF) in N,N dimethylacetamide (DMA). Whereas the positive electrode is prepared by spreading a slurry of MnO2, carbon black, graphite fibers, PVDF in DMA. A 1M Na2SO4 solution impregnated in the porous paper separator (Nippon Kodoshi Corportion, Japan) and a polymer electrolyte membrane (Nafion 115) have been employed as electrolytes. The different supercapacitors were electrochemically characterized by cyclic voltammetry (CV), galvanostatic charge/discharge (G–CD), electrochemical impedance spectroscopy (EIS) and long-term cycling stability tests. The hybrid carbon-based textile supercapacitors exhibited capacitance performance of 137 and 120 F/g with the porous separator and Nafion 115 membrane, respectively. Specially, the solid-state (Nafion membrane) hybrid device demonstrated very long stability in cycling (10000 cycles) and holding voltage condition at 1.6 V (more than 100 h). Besides, these textile-based capacitors also showed slow self-discharge.This work was partly financed by FEDER funds through the Competitivity Factors Operational Programme - COMPETE and by national funds through FCT – Foundation for Science and Technology (project POCI-01-0145-FEDER-007136). A. J. Paleo acknowledges the European COST Action CA15107- Multi-Functional Nano-Carbon Composite Materials Network (MultiComp) that conceded a Short Term Scientific Mission (STSM) at CNR-ITAE of Messina.info:eu-repo/semantics/publishedVersio

Development of carbon/MnO₂ coated on nanofiber textile electrodes for hybrid solid-state supercapacitors

This work is focused on the design and development of hybrid solid-state energy storage devices with high capacitive performance. In particular, the work includes, the preparation of carbon composite electrodes based on a carbon nanofibers (CNF) supported on a cotton fabric. The coating of CNF to the cotton cloth is obtained by the dip and dry method. On these so-obtained composite substrates, further layers of activated carbon (Norit A Supra Eur) and manganese oxide (MnO2) material have been subsequenlty deposited to enhance the electrochemical performances of negative and positive electrodes, respectively. The preparation of carbon-based active layers comprises the spreading on the negative CNF-substrate of a slurry containing the activated carbon (AC) material, graphite fibres and polyvinylidene difluoride (PVDF) in N,N dimethylacetamide (DMA). Whereas the positive electrode is prepared by spreading a slurry of MnO2, carbon black, graphite fibers, PVDF in DMA. A 1M Na2SO4 solution impregnated in the porous paper separator (Nippon Kodoshi Corportion, Japan) and a polymer electrolyte membrane (Nafion 115) have been employed as electrolytes. The different supercapacitors were electrochemically characterized by cyclic voltammetry (CV), galvanostatic charge/discharge (G–CD), electrochemical impedance spectroscopy (EIS) and long-term cycling stability tests. The hybrid carbon-based textile supercapacitors exhibited capacitance performance of 137 and 120 F/g with the porous separator and Nafion 115 membrane, respectively. Specially, the solid-state (Nafion membrane) hybrid device demonstrated very long stability in cycling (10000 cycles) and holding voltage condition at 1.6 V (more than 200 h). Besides, these textile-based capacitors also showed really slow self-discharge.info:eu-repo/semantics/publishedVersio

Sistema Modular para o Teste de Cartas de Circuito Impresso com BST

Esta comunicação apresenta a arquitectura física de um sistema modular para o teste e validação de Cartas de Circuito Impresso (CCI) que disponham de uma infraestrutura compatível com a norma IEEE 1149.1, vulgarmente designada por Boundary Scan Test (BST). A arquitectura global do sistema compreende ainda um nível lógico constituído por um pacote de apoio informático para a geração automática de programas de teste.info:eu-repo/semantics/publishedVersio

Intra-crustal recycling and crustal-mantle interactions in

In situ O-isotope compositions of detrital, inherited and melt-precipitated zircons with Neoproterozoic to Ordovician ages are presented to assess the crustal evolution of the North Gondwana margin. Different groups of pre-Mesozoic rocks from SW Iberia were targeted: i) Ediacaran paragneisses and meta-greywakes of the Ossa-Morena Zone – the Serie Negra Group deposited at ~ 560 Ma in a Cadomian magmatic arc setting (Pereira et al., 2008); ii) Early to Middle Cambrian orthogneisses and volcaniclastic rocks of the Ossa-Morena Zone – Evora Massif igneous complexes related to ensialic rifting at ~ 530–500 Ma (Pereira et al., 2008, Chichorro et al., 2008); iii) Late Cambrian to Early Ordovician volcaniclastic rocks and granites of the Ossa-Morena–Central Iberian transition zone – the Urra Formation and Portalegre granite formed at ~ 495– 488 Ma in a extensional setting (Solá et al., 2008); iv) Carboniferous granitoids (Nisa and Arraiolos granites) containing inherited zircons with Cambrian to Ordovician ages (Solá, this volume). A compilation the results for the period ~ 3.4 Ga to ~ 450 Ma reveals that: a) Archean zircons show little variation in d18O, with most values lying between 4.7 and 7.5‰, (average 6.2‰) comparable with usual d18O of zircons from Archean elsewhere (e.g., Valley et al., 2005); b) the range of d18O in Paleoproterozoic grains increases between 2.1 and 1.8 Ga with d18O >7.5‰, indicating increasing supracrustal recycling, but at ~ 1.8 Ga the d18O has mantle-like values (<5.1‰), documenting a crustal growth episode at this time; c) rare Mesoproterozoic grains have mildly evolved d18O values in the range 5.6–7.1‰); d) Tonian grains have low d18O values (4.2–5.6‰) typical of mantle-derived juvenile magmas but also higher values of 9.9‰ suggesting intra-crustal recycling; e) Cryogenian–Ordovician zircons show more variable and higher d18O values (~4 to >10‰), indicating great diversity and mixing of sources through intra-crustal recycling and crust–mantle interactions; f) some d18O values near to or below mantle composition (5.3 ± 0.3‰) were recorded at ~ 590 Ma (Ediacaran) suggesting input of mantle material into the crust; g) a decrease in variance of d18O occurs from 575 Ma to the Ediacaran/Cambrian boundary, suggesting a relative decrease in the magmatic contribution of surface-derived material; h) in Cambrian times, the average d18O is higher in the 536–520Ma interval (7.0‰) than in the 520–488 interval (6.2‰), which can be taken as a signal of gradual opening of the system to mantle-derived, mafic, rift-related igneous complexes; i) higher values of d18O (>7.5 ‰) recorded at ~ 623–574 Ma and 490–470Ma mark periods of pronounced increase in crustal recycling

Effect of nacl replacement by other salts on the quality of bísaro pork sausages (Pgi chouriça de vinhais)

Concerned about the trend to reduce salt consumption, the meat industry has been increasing the strategies to produce and commercialize products where the reduction or even the replacement of NaCl is an important goal. The aim of this study was to test the effect of partial NaCl replacement by KCl and Sub4Salt® on the quality of pork sausages. Three different formulations (NaCl + KCl, NaCl + Sub4Salt®, and KCl + Sub4Salt®) were considered and compared to the control (2% NaCl). Physicochemical properties, chemical composition, and microbiological and sensory characteristics were evaluated. The replacement of NaCl did not affect pH, water activity (aw) or its chemical composition after eight or 16 days ripening time, while a significant sodium reduction was achieved. The oxidation index expressed in TBARS was also not affected by the NaCl substitution and varied between 0.01 to 0.04 of malonaldehyde (MDA) per kg of sample. Similarly, the NaCl replacement did not change the microbiological quality of the sausages, and the production of healthier meat sausages had also no significant effect on their sensory characteristics. Therefore, according to the results obtained, it is viable and a good strategy for the meat industry to produce “reduced sodium content” sausages without affecting their traditional quality.The authors are grateful to the Foundation for Science and Technology (FCT, Portugal) for financial support by national funds FCT/MCTES to CIMO (UIDB/00690/2020); to Bísaro-Salsicharia Tradicional industry and to Laboratory of Carcass and Meat Quality of Agriculture School of Polytechnic Institute of Bragança ‘Cantinho do Alfredo’. Thanks are extended to GAIN (Axencia Galega de Innovación) for supporting this work (grant number IN607A2019/01). The authors are members of the Healthy Meat network, funded by CYTED (ref. 119RT0568).info:eu-repo/semantics/publishedVersio

Effectiveness of a combined surf and psychological preventive intervention with children and adolescents in residential childcare: A randomized controlled trial

Children and adolescents living in residential childcare have a higher prevalence of mental health problems as a result of a history of adverse childhood experiences. Therefore, this population should be a priority target for mental health preventive interventions. The current study analyses the effectiveness of the Wave by Wave surf therapy program, that combines surfing with a psychological group intervention, through a randomized controlled trial. Seventy-three youth (7-17 years) living in residential care participated in the study. Main mental health outcomes (adjustment problems, depression, anxiety, and wellbeing) and secondary outcomes (self-efficacy, self-regulation, sleep quality, physical activity, pro-social behavior, and social connectivity) were assessed at pre- and post-intervention. The results indicated a significant impact of the intervention on mental health outcomes reported by the key residential worker, with medium to large effect sizes. Specifically, after the intervention, there was a significant reduction in the total emotional and behavioural problems, and a significant increase of youth pro-social behaviour and quality of life that was not observed for the waiting list group. There were no significant effects on other measures reported by the children (e.g., depression and anxiety, self-esteem, emotion regulation, social connectedness, sleep quality, physical activity) and on executive functions measures. The Wave by Wave program seems to be an effective intervention to reduce behavior problems and to promote pro-social behavior in a high-risk sample. The absence of significant effects on other dimensions may indicate the need of some complementary support to address specific difficulties of this population.Efectividad de una intervención preventiva psicológica y de surf combinada con niños y adolescentes en cuidado residencial: Un ensayo controlado aleatorizado. Los niños y adolescentes que viven en acogimiento residencial tienen una mayor prevalencia de problemas de salud mental. Por lo tanto, esta población debe ser un objetivo prioritario para las intervenciones preventivas de salud mental. El estudio actual analiza la efectividad del programa Wave by Wave, que combina el surf con una intervención psicológica grupal, a través de un ensayo controlado aleatorio. Setenta y tres jóvenes (7-17 años) que viven en acogimiento residencial participaron en el estudio. Los principales resultados de salud mental (problemas de ajuste, depresión, ansiedad y bienestar) y los resultados secundarios (autoeficacia, autorregulación, calidad del sueño, actividad física, comportamiento prosocial y conectividad social) se evaluaron antes y después de intervención. Los resultados indicaron un impacto significativo de la intervención sobre los resultados de salud mental reportados por el cuidador en la residencia. Específicamente, después de la intervención, hubo una reducción significativa en los problemas emocionales y conductuales totales, y un aumento significativo del comportamiento prosocial de los jóvenes y de la calidad de vida que no se observó en el grupo control. No hubo efectos significativos en otras medidas reportadas por los niños (ex., depresión y ansiedad, autoestima) y en las medidas de las funciones ejecutivas. El programa Wave by Wave parece ser una intervención efectiva para reducir los problemas de comportamiento y promover el comportamiento prosocial en una muestra de alto riesgo. La ausencia de efectos significativos en otras dimensiones puede indicar la necesidad de algún apoyo complementario para abordar las dificultades específicas de esta población.

A hybrid of 1-deoxynojirimycin and benzotriazole induces preferential inhibition of butyrylcholinesterase (BuChE) over acetylcholinesterase (AChE)

The synthesis of four heterodimers in which the copper(I)-catalysed azide-alkyne cycloaddition was employed to connect a 1-deoxynojirimycin moiety with a benzotriazole scaffold is reported. The heterodimers were investigated as inhibitors against acetylcholinesterase (AChE) and butyrylcholinesterase (BuChE). The heterodimers displayed preferential inhibition (> 9) of BuChE over AChE in the micromolar concentration range (IC50 = 7–50 µM). For the most potent inhibitor of BuChE, Cornish-Bowden plots were used, which demonstrated that it behaves as a mixed inhibitor. Modelling studies of the same inhibitor demonstrated that the benzotriazole and 1-deoxynojirimycin moiety is accommodated in the peripheral anionic site and catalytic anionic site, respectively, of AChE. The binding mode to BuChE was different as the benzotriazole moiety is accommodated in the catalytic anionic site.publishedVersio