Relative contribution of biotic and abiotic factors to the population density of the cassava green mite, Mononychellus tanajoa (Acari: Tetranychidae).

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A crise social desenhada pelas crianças: imaginação e conhecimento social

A crise social e económica que tem atingido o mundo desde 2008, com efeitos especialmente sentidos nos países do Sul da Europa, causou impactos fortes e visíveis na infância, como o aumento das taxas efetivas e de risco de pobreza e a vulnerabilidade e a exposição a fatores de risco social e de perda consistente de direitos. A análise dessas incidências tem vindo a ser trabalhada num conjunto de relatórios nacionais e internacionais, de ONG’s e estudos académicos. No entanto, poucos estudos têm dedicado atenção ao modo como a interpretação das representações das crianças sobre a crise é feita e sobre as expressões específicas que estas assumem na sua vida quotidiana. As crianças são capazes de observar os modos como a crise impacta o seu próprio grupo geracional, bem como os adultos que mais lhe são próximos. Da mesma forma, promovem interpretações económicas sobre os fenómenos, sejam elas mais “ingénuas” ou mais complexas. Este artigo incide sobre as representações das crianças sobre a crise social e económica em Portugal. São especialmente analisadas narrativas gráficas produzidas por crianças oriundas de classes trabalhadoras, com idades compreendidas entre os 6 e os 10 anos de idade. Por meio dessas narrativas, as crianças constroem formas visuais a partir da sua imaginação sobre a sua condição. Assim, a imaginação das crianças é um modo de acesso ao conhecimento na sociedade onde se inserem e aos seus modos próprios de compreensão de realidades complexas.The social and economic crisis that has hit the world since 2008, with effects strongly felt in the countries of Southern Europe, has had fierce and visible impacts in childhood with the increase of the effective rates, the risk of poverty and vulnerability, and the exposure to factors of social risk and consistent loss of rights. The analysis of these incidents has been worked on in a series of national and international reports from NGOs and academic studies. However, few studies have devoted attention to the way in which the interpretation of the representations of children about the crisis is made and the specific expressions that they assume in their daily lives. Children are able to observe the ways in which the crisis affects their own generational group as well as the adults closest to them. In the same way, they promote economic interpretations of phenomena, whether “naïve” or more complex. This article focuses on the representations of children about the social and economic crisis in Portugal. Graphical narratives produced by children from working classes, aged between 6 and 10 years old, are given focus. From these narratives, children construct visual forms from their imagination about their social condition. Thus, the child’s imagination is a way of accessing knowledge in the society they belong to and their own way of understanding complex realities.CIEC - Centro de Investigação em Estudos da Criança, IE, UMinho (UI 317 da FCT), Portugalinfo:eu-repo/semantics/publishedVersio

Population structure and dynamics of the cassava green mite Mononychellus tanajoa (Bondar) and the predator Euseius ho (DeLeon) (Acari: Tetranychidae, Phytoseiidae).

Population structure and dynamics of the cassava green mite Mononychellus tanajoa and the predator Euseius ho (Acari: Tetranychidae, Phytoseiidae). Cassava is attacked by several pests, among which the cassava green mite Mononychellus tanajoa.bitstream/item/123027/1/Population-structure-and-dynamics-Tabuleiros-Costeiros.pd

Barrier properties of films of pea starch associated with xanthan gum and glycerol

O objetivo do trabalho foi avaliar as propriedades de barreira e a solubilidade de biofilmes obtidos a partir de amido de ervilha de alto teor de amilose em associação à goma xantana e glicerol. Soluções filmogênicas (SF) com diferentes teores de amido de ervilha (3, 4 e 5%), goma xantana (0, 0,05 e 0,1%) e glicerol (proporção glicerol-amido de 1:5 P/P) foram estudadas. As SF foram obtidas por ebulição (5 minutos), seguida de autoclavagem por 1 hora a 120 ºC e os filmes foram preparados por casting. O aumento da concentração de amido e de glicerol na composição causou aumento da espessura e da solubilidade dos filmes em água. O plastificante gerou ainda elevação dos coeficientes de permeabilidade ao vapor d'água e ao oxigênio. O aumento da concentração da goma xantana não interferiu nas propriedades estudadas. Os biofilmes obtidos a partir de amido de ervilha verde, associado ou não à goma xantana e glicerol, se comparados com filmes de amido de ervilha amarelas e outras fontes de amido, apresentaram boa barreira ao oxigênio e ao vapor d'água e baixa solubilidade em água.The aim of this work was to evaluate the barrier properties and solubility of biofilms made from wrinkled pea starch with high amylose content in association with xanthan gum and glycerol. Filmogenic solution (FS) with different levels of pea starch (3, 4 and 5%), xanthan gum (0, 0.05 and 0.1%) and glycerol (glycerol-starch 1:5 W/W) were tested. FS was obtained by boiling (5 minutes), autoclaving for 1 hour at 120 ºC and the films were prepared by casting. The increased concentration of starch and glycerol in the composition caused increases in thickness of the films and in their solubility in water. The plasticizer also generated higher coefficients of water vapor and oxygen permeabilities to water vapor and to oxygen. The increasing concentration of xanthan gum did not interfere in the properties studied. Biofilms produced with wrinkled pea starch, with or without xanthan gum and glycerol, showed better barrier to oxygen and water vapor and low solubility in water, in comparison with films of yellow pea starch and other starch sources.Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP

Estado e Sociedade Civil no Processo de Migração Venezuelana

This article presents a synthesis of the results of the research developed during postdoctoral in Society and Borders, with scholarship of the "Coordenação de aperfeiçoamento de pessoal de nível superior" (CAPES) (Scholarship Education Personnel Improvement Coordination), in the Federal University of Roraima, between 2018 and 2020. The objective is to analyze the role exercised by the organizations/entities of the civic society acting on the migratory subject at the time of the research, who engaged in Operation Acolhida. The data obtained by the field research, through semi-open interviews with key interlocutors and the participating observation in the different acting spaces of those entities/organizations, proven an intense protagonism from the acting parts in fighting the situations of precariousness, violation of rights, harassment against migrants, in addition to the intense political pressure for government response. However, after the establishment of the official humanitarian response in 2018 and, therefore, the inclusion of entities as collaborators in operation "Acolhida", the roles of these actors were reconfigured. The assistance actions, considered emergency, prevailed over actions of political incidence. In the absence of social pressure for an effective public policy, the migratory management has been based on a permanent emergency model for five years. Such process suggests the importance of critically (re)thinking the current model, the interests that the actual model caters to and the role of the organized civil society in transforming the emergency humanitarian aid in migratory policy.O presente artigo apresenta uma síntese dos resultados da pesquisa desenvolvida nos marcos do pós-doutoramento no Programa de Pós-Graduação em Sociedade e Fronteiras, com bolsa da Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES), na Universidade Federal de Roraima, entre 2018 e 2020. Tem como objetivo analisar o papel exercido pelas organizações/entidades da sociedade civil atuantes na questão migratória na época da pesquisa que se engajaram na Operação Acolhida. Os dados obtidos pela pesquisa de campo, através de entrevistas semiestruturadas (abertas) com interlocutores-chaves e da observação participante nos diferentes espaços de atuação dessas entidades/organizações, evidenciaram um intenso protagonismo desses atores no enfrentamento de situações de precariedade, de violação de direitos, de hostilização contra os migrantes, além de intensa pressão política por resposta governamental. Não obstante, após o estabelecimento da Resposta Humanitária oficial em 2018 e, portanto, da inserção das entidades como colaboradoras na Operação Acolhida, a atuação desses atores foi se reconfigurando. As ações de assistência, consideradas emergenciais, prevaleceram sobre as ações de incidência política. Na ausência de pressão social por uma política pública efetiva, a gestão migratória mantém-se há cinco anos pautada em um modelo de emergência permanente. Tal processo sugere a importância de (re)pensar criticamente o modelo vigente, os interesses que o atual modelo atende e o papel da sociedade civil organizada na transformação da ajuda humanitária emergencial em política migratória

Analysing consumer-brand engagement through appreciative listening on social network platforms

The evolution of technology changed the external environment surrounding businesses creating a plethora of new opportunities and challenges. Particularly, social network platforms became attractive to companies due to their interactive nature as they increase consumers’ and brand opportunities for developing long-term relationships and engagement. In this sense, the main goal of this article is to understand whether appreciative listening can contribute to the improvement of consumer-brand engagement using these platforms. We develop two studies based on Starbuck’s facebook page whereby findings from study one are used as inputs to study two. Results demonstrate that appreciative listening can actually improve consumer-brand engagement.info:eu-repo/semantics/acceptedVersio

Crescimento, produção de fitomassa e teor de óleo essencial de folhas de capim citronela (Cymbopogon nardus (L.) Rendle) em cultivo consorciado com algodoeiro colorido no semiárido mineiro.

Avaliou-se o crescimento, a produção e o teor do óleo essencial de dois cortes de capim citronela em cultivo consorciado com algodoeiro colorido no semiárido. Para isso foram utilizados dois sistemas de consórcios (tratamentos): algodão colorido consorciado com capim citronela 3x1 e algodão colorido consorciado com capim citronela 1x1. A variedade de algodão colorido utilizada foi a BRS Rubi e as mudas de capim citronela foram produzidas no Horto de Plantas Medicinais da Unimontes. O delineamento experimental utilizado foi em blocos casualizados com dois tratamentos e 16 repetições. O experimento foi mantido em regime de sequeiro e foi avaliado a altura das plantas de capim citronela. Foram realizadas duas colheitas das folhas de capim citronela, sendo a primeira no momento da colheita da fibra do algodão e a segunda na rebrota do capim, seis meses após. Todas as plantas da parcela foram colhidas e as folhas frescas foram pesadas, no campo, com o auxílio de balança digital. Amostras das folhas colhidas foram retiradas e levadas para secagem em estufa com circulação forçada de ar a 35ºC até atingirem massa constante. Foi verificada a massa seca e posteriormente realizada a extração do óleo essencial pelo método de hidrodestilação em aparelho modificado de Clevenger. Os dados foram submetidos à análise de variância e as médias comparadas pelo teste Skott-Knott (p<0,05). A altura das plantas não diferiu entre os tratamentos nas colheitas. Para a produção de massa fresca e seca houve diferença entre os tratamentos apenas na segunda colheita. Neste caso, as plantas cultivadas em consórcio 1x1 produziram mais do que as do consórcio 3x1. O teor de óleo essencial de capim citronela não variou entre os dois sistemas de consórcio, tanto no primeiro como no segundo corte

Thermostability of cardosin A from Cynara cardunculus L.

The structural stability of cardosin A, a plant aspartic proteinase (AP) from Cynara cardunculus L., has been investigated by high-sensitivity differential scanning calorimetry, intrinsic fluorescence and circular dichroism spectroscopy, and enzymatic activity assays. Even though the thermal denaturation of cardosin A is partially irreversible, valid thermodynamic data can be obtained within a wide pH region. Also, although cardosin A is a heterodimeric enzyme its thermal denaturation occurs without simultaneous dissociation to unfolded monomers. Moreover, in the 3-7 pH region the excess heat capacity can be deconvoluted into two components corresponding to two elementary two-state transitions, suggesting that the two polypeptide chains of cardosin A unfold independently. Detailed thermodynamic and structural investigations of cardosin A at pH=5.0, at which value the enzyme demonstrates maximum stability and enzymatic activity, revealed that after thermal denaturation the polypeptide chains of this protein retain most of their secondary structure motifs and are not completely hydrated.http://www.sciencedirect.com/science/article/B6THV-47P1SF6-4/1/edc14f851e47459fcd87b748d068439

Gene Silencing via PDA/ERK2-siRNA-Mediated Electrospun Fibers for Peritendinous Antiadhesion

Sustained delivery of small interfering RNA (siRNA) is a challenge in gene silencing for managing gene-related disorders. Although nanoparticle-mediated electrospun fibers enable sustainable gene silencing, low efficiency, loss of biological activity, toxicity issues, and complex electrospinning techniques are all bottlenecks of these systems. Preventing peritendinous adhesion is crucial for their successful use, which involves blocking cellular signaling via physical barriers. Here, a multifunctional, yet structurally simple, cationic 2,6-pyridinedicarboxaldehyde-polyethylenimine (PDA)-mediated extracellular signal-regulated kinase (ERK)2-siRNA polymeric delivery system is reported, in the form of peritendinous antiadhesion electrospun poly-l-lactic acid/hyaluronan membranes (P/H), with the ability to perform sustained release of bioactive siRNA for long-term prevention of adhesions and ERK2 silencing. After 4 days of culture, the cell area and proliferation rate of chicken embryonic fibroblasts on siRNA+PDA+P/H membrane are significantly less than those on P/H and siRNA+P/H membranes. The in vivo results of average optical density of collagen type III (Col III) and gene expression of ERK2 and its downstream SMAD3 in the siRNA+PDA+P/H group are less than those of P/H and siRNA+P/H groups. Consequently, siRNA+PDA+P/H electrospun membrane can protect the bioactivity of ERK2-siRNA and release it in a sustained manner. Moreover, adhesion formation is inhibited by reducing fibroblast proliferation and Col III deposition, and downregulating ERK2 and its downstream SMAD3.S.L. and F.W. contributed equally to this work. This work was supported by the National Science Foundation of China (Grant Nos. 81772314, 51873107, and 81572099), Science and Technology Commission of Shanghai Municipality (Grant No. 15QA1403400 and 18ZR1434200), Shanghai Junior Outstanding Talent Program, Shanghai Municipal Education Commission-Gaofeng Clinical Medicine Grant Support (Grant Nos. 20171906 and 17XJ11004), Foundation for Young Scientists of Shanghai Health and Family Planning Commission (Grant No. 2017YQ022), Shanghai Jiao Tong University “Medical and Research” Program, and Shanghai Jiao Tong University SMC Young Scholar Program B. This manuscript is a result of the project NORTE-01-0145-FEDER-000012, supported by Norte Portugal Regional Operational Programme (NORTE2020), under the PORTUGAL2020 Partnership Agreement, through the European Regional Development Fund (ERDF). This work was financed by FEDER—Fundo Europeu de Desenvolvimento Regional funds through the COMPETE2020—Operacional Programme for Competitiveness and Internationalisation (POCI), Portugal 2020, and by Portuguese funds through FCT—Fundação para a Ciência e a Tecnologia/Ministério da Ciência, Tecnologia e Ensino Superior in the framework of the project “Institute for Research and Innovation in Health Sciences” (POCI-01-0145-FEDER-007274). S.L. and F.W. contributed equally to this work. This work was supported by the National Science Foundation of China (Grant Nos. 81772314, 51873107, and 81572099), Science and Technology Commission of Shanghai Municipality (Grant No. 15QA1403400 and 18ZR1434200), Shanghai Junior Outstanding Talent Program, Shanghai Municipal Education Commission-Gaofeng Clinical Medicine Grant Support (Grant Nos. 20171906 and 17XJ11004), Foundation for Young Scientists of Shanghai Health and Family Planning Commission (Grant No. 2017YQ022), Shanghai Jiao Tong University ?Medical and Research? Program, and Shanghai Jiao Tong University SMC Young Scholar Program B. This manuscript is a result of the project NORTE-01-0145-FEDER-000012, supported by Norte Portugal Regional Operational Programme (NORTE2020), under the PORTUGAL2020 Partnership Agreement, through the European Regional Development Fund (ERDF). This work was financed by FEDER?Fundo Europeu de Desenvolvimento Regional funds through the COMPETE2020?Operacional Programme for Competitiveness and Internationalisation (POCI), Portugal 2020, and by Portuguese funds through FCT?Funda??o para a Ci?ncia e a Tecnologia/Minist?rio da Ci?ncia, Tecnologia e Ensino Superior in the framework of the project ?Institute for Research and Innovation in Health Sciences? (POCI-01-0145-FEDER-007274)