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Spinel ferrites are versatile, low-cost, and abundant metal oxides with remarkable electronic and magnetic properties, which find several applications. Among them, they have been considered part of the next generation of electrochemical energy storage materials due to their variable oxidation states, low environmental toxicity, and possible synthesis through simple green chemical processing. However, most traditional procedures lead to the formation of poorly controlled materials (in terms of size, shape, composition, and/or crystalline structure). Thus, we report herein a cellulose nanofibers-mediated green procedure to prepare controlled highly porous nanocorals comprised of spinel Zn-ferrites. Then, they presented remarkable applications as electrodes in supercapacitors, which were thoroughly and critically discussed. The spinel Zn-ferrites nanocorals supercapacitor showed a much higher maximum specific capacitance (2031.81 F g−1 at a current density of 1 A g−1) than Fe2O3 and ZnO counterparts prepared by a similar approach (189.74 and 24.39 F g−1 at a current density of 1 A g−1). Its cyclic stability was also scrutinized via galvanostatic charging/discharging and electrochemical impedance spectroscopy, indicating excellent long-term stability. In addition, we manufactured an asymmetric supercapacitor device, which offered a high energy density value of 18.1 Wh kg−1 at a power density of 2609.2 W kg−1 (at 1 A g−1 in 2.0 mol L−1 KOH electrolyte). Based on our findings, we believe that higher performances observed for spinel Zn-ferrites nanocorals could be explained by their unique crystal structure and electronic configuration based on crystal field stabilization energy, which provides an electrostatic repulsion between the d electrons and the p orbitals of the surrounding oxygen anions, creating a level of energy that determines their final supercapacitance then evidenced, which is a very interesting property that could be explored for the production of clean energy storage devices.

We describe herein the synthesis of solid Au@Pd and hollow AgPd nanoflowers displaying controlled sizes and compositions in order to investigate how their size, composition, and the presence of Au in the core of the nanoparticles influence their catalytic performance toward both liquid and gas-phase transformations. While the size and composition of Au@Pd and AgPd the nanoflowers could be controlled as function of growth time, their structure (solid or hollow) was dependent on the nature of the seeds employed for the synthesis, i.e., Au or Ag nanoparticles. Moreover, Au@Pd and AgPd nanoflowers were successfully supported onto commercial silica displaying truly uniform dispersion. The catalytic activities of Au@Pd and AgPd nanoflowers were investigated toward the 4-nitrophenol reduction and the benzene, toluene, and o-xylene (BTX) oxidation. The catalytic activities for the reduction of 4-nitrophenol decreased as follows: Au₅₈@Pd₄₂ > Au₂₇@Pd₇₃ > Ag₂₀Pd₈₀ and Ag₈Pd₉₂ > Au₁₂@Pd₈₈ > Ag₃₈Pd₆₂, suggesting that the Au core enhanced the catalytic activity relative to the hollow material when for Pd at.% was up to 80. Regarding the BTX oxidation, supported Au@Pd displayed higher catalytic activities than AgPd nanoflowers, also illustrating the role of the Au cores in the nanoflowers for improving catalytic performance. We believe these results may serve as a platform for the synthesis of Pd-based bimetallic nanomaterials that enable the correlation between these physical/chemical parameters and properties and thus optimized catalytic activities.

Resumo Objetivo Analisar as medidas antropométricas associadas ao tempo de encarceramento de pessoas privadas de liberdade. Métodos Estudo transversal, realizado com 220 homens privados de liberdade. Os dados foram coletados por meio de instrumento que abrangia informações do encarceramento atual, sociodemográficas e das condições de vida antes do encarceramento, além de aferição de medidas antropométricas. Utilizaram-se estatística descritiva, testes de associações e ajuste de modelos de regressão logística binária controlados pelo tempo de encarceramento (até 1ano e mais de 1ano). Resultados Houve associação significativa entre o tempo de encarceramento e a circunferência abdominal (RC de 0,41; IC95%0,16-0,97). Os resultados da correlação de Spearman apontaram que, à medida que aumentou o tempo de encarceramento, as medidas antropométricas diminuíram, com relação negativa de fraca magnitude e significativa apenas para o índice de conicidade (r=-0,1648; p=0,0144). Os modelos ajustados controlados pelo tempo de encarceramento mostraram associações significativas com idade em anos (RC de 1,08; IC95%=1,04;1,12) e circunferência abdominal; idade (RC de 1,08; IC95%1,04-1,12) e razão cintura e estatura; e idade (RC de 1,10; IC95%1,06-1,14), anos de estudo (RC de 2,17; IC95%1,10-4,26) e possuir parceiro(a) (RC de 0,46; IC95%0,22-0,93) com o índice de conicidade. Conclusão À medida que aumenta o tempo de encarceramento, há redução das medidas antropométricas das pessoas privadas de liberdade. As variáveis antropométricas influenciam diretamente no desenvolvimento de doenças crônicas não transmissíveis e devem ser monitoradas para elaboração de estratégias que minimizem os riscos e os agravos à saúde dessa população vulnerável.

Este estudo apresenta resultados de uma pesquisa de natureza qualitativa que teve como objetivo compreender como os/as professores/as de Ciências e Biologia, no início de carreira, constroem saberes didático-pedagógicos nas suas práticas cotidianas. Os dados foram produzidos por meio de entrevista semiestruturada, desenvolvida com quatro professores das disciplinas escolares Ciências e Biologia, em escolas públicas, na cidade de Vitória da Conquista, Bahia. A Análise de Conteúdo foi empregada, mediante uma imersão nas narrativas dos/as professores/as, por meio da qual analisamos o contexto das suas práticas, o que nos permitiu registrar modos de fazer docente. A análise sugere que parte dos saberes didático-pedagógicos desenvolvidos pelos/as professores/as no início da atuação profissional é situada, isto é, constituída por meio de uma articulação entre conhecimentos aprendidos na formação inicial e aqueles que emergem da ação no contexto da sala de aula, o que possibilita a construção de um estilo próprio de ensinar, favorecendo o emergir de artes de fazer (Certeau, 1994). Nesse sentido, formas particulares são criadas ao abordar o conteúdo das disciplinas escolares em situações reais de ensino, proporcionando a construção dos saberes em início de carreira.

The synthesis of trimetallic nanoparticles represents an emerging strategy to maximize catalytic performances in noble metal-based catalysts. However, the controllable synthesis of trimetallic nanomaterials as well as the exact role played by the addition of a third metal in their composition over catalytic performances remains unclear. In this paper, we describe the synthesis of trimetallic nanoshells having AgAuPd, AgAuPt, and AgPdPt compositions by a sequential galvanic replacement reaction approach between Ag nanospheres as sacrificial templates and the corresponding metal precursors, i.e., AuCl 4 − (aq) , PdCl 4 2− (aq) , and/or PtCl 6 2− (aq) . In each of these systems, the composition could be systematically tuned by varying the molar ratios between Ag and each metal precursor. Nanoshells having Ag 56 Au 28 Pd 16 , Ag 78 Au 9 Pt 13 , and Ag 71 Pd 16 Pt 13 compositions were employed as model systems to investigate the effect of the addition of the third metal in their composition over the catalytic activities toward the 4-nitrophenol reduction. Our data demonstrate a significant enhancement in conversion percentages and thus the catalytic activities relative to the sum of their bimetallic counterparts, and this increase was dependent on the nature of the metals, corresponding to 826, 135, and 56 % for Ag 56 Au 28 Pd 16 , Ag 78 Au 9 Pt 13 , and Ag 71 Pd 16 Pt 13 nanoshells relative to their bimetallic analogs. The results presented herein demonstrate the strong correlation between catalytic activity and composition in multimetallic nanoshells, and that the incorporation of a third metal may represent a promising approach to boost catalytic activities for a variety of transformations.

Oral melanoacanthoma is an uncommon reactive lesion, characterized by basal and prickle cell keratinocyte proliferation surrounded by pigment-laden dendritic melanocytes. Plasma cell cheilitis (PCC) is an inflammatory disorder of unknown aetiology, microscopically presenting a dense plasma cell infiltrate. Most PCC cases affect the lower lip. Langerhans cell hyperplasia (LCHyp), a non-neoplastic counterpart of the LC proliferations, has been reported in association with chronic inflammatory skin diseases. Here, we present an unusual association of melanoacanthoma, PCC and LCHyp on the lower lip in a 59-old-year male, expanding the clinicopathological spectrum of these uncommon lesions. The dendritic melanocytes were highlighted by Fontana-Masson stain and HMB-45, whereas S100, CD1a and CD207 evidenced numerous LCs. MUM1/IRF4, EMA, and CD138 highlighted sheets of polyclonal plasma cells, with an IgG4+/IgG+ ratio of 24%. FTA-ABS test for syphilis was negative.

This paper presents an artificial intelligence-based classification model for the detection of pulmonary embolism in computed tomography angiography. The proposed model, developed from public data and validated on a large dataset from a tertiary hospital, uses a two-dimensional approach that integrates temporal series to classify each slice of the examination and make predictions at both slice and examination levels. The training process consists of two stages: first using a convolutional neural network InceptionResNet V 2 and then a recurrent neural network long short-term memory model. This approach achieved an accuracy of 93% at the slice level and 77% at the examination level. External validation using a hospital dataset resulted in a precision of 86% for positive pulmonary embolism cases and 69% for negative pulmonary embolism cases. Notably, the model excels in excluding pulmonary embolism, achieving a precision of 73% and a recall of 82%, emphasizing its clinical value in reducing unnecessary interventions. In addition, the diverse demographic distribution in the validation dataset strengthens the model’s generalizability. Overall, this model offers promising potential for accurate detection and exclusion of pulmonary embolism, potentially streamlining diagnosis and improving patient outcomes.

This research focused on the development and characterization of gelatin-based films incorporated with cellulose microfibrils (CMFs) extracted from cowpea pod skin (Vigna unguiculata, CPMC) and corn straw (Zea mays, CSMC). The use of CPMC to produce gelatin films has not been previously reported in the literature. Eleven formulations were prepared based on a 22 factorial design with four axial and three central points, in addition to a control film (FC) composed of 1.00% gelatin and 1.00% glycerol without CMFs. The physical, chemical, structural, and mechanical properties of the films were evaluated. The optimized formulation (FO), containing 1.00% CPMC and 1.00% CSMC, exhibited a four-fold increase in tensile strength (2.71 MPa) compared to the control. Water vapor permeability was significantly reduced (from 6.33 × 10−4 to 2.82 × 10−4 gH2O·mm/m2·h·mmHg), and solubility decreased to 75.82%. Biodegradability was modulated, with FO exhibiting 73.06% degradation over three days versus complete degradation of FC within one day. The incorporation of CMFs, particularly from agro-industrial residues, significantly improved the structural integrity and barrier properties of the films, highlighting their potential for use in biodegradable packaging systems.

The aim of this study was to develop and characterize antioxidant-active films for potential food packaging applications. The films were produced by casting aqueous solutions containing semolina flour (6% w/w), pectin extracted from passion fruit (1% w/w), inverted sugar (1% w/w), and sucrose (1% w/w), incorporating hydroalcoholic extracts from jatoba stem bark (X1) and pods (X2) at concentrations ranging from 0 to 1% (w/w). The films were characterized in terms of their functional, physical, chemical, structural, and degradation properties. The formulation that showed the best performance, referred to as the optimized formulation (FO), contained 0.5% X1 and 0.5% X2, presenting a high phenolic compound content (8.80 mg GAE/g), strong antioxidant activity as determined by the DPPH method (75.28%) and FRAP assay (6.02 mmol FeSO4/g), good thermal stability (350 °C), and a high soil degradation rate (83.47% in 15 days). These results indicate that the FO film has potential application as a primary packaging material with antioxidant function for oxidation-sensitive foods, meeting the demand for biodegradable and environmentally sustainable solutions in the food industry.

Caatinga is a typical Brazilian biome facing severe threats despite its ecological and socio-economic importance. Conservation strategies are essential in protecting ecosystems and ensuring natural resource sustainability. Mata da Pimenteira State Park (PEMP), launched in 2012, is an example of such a strategy. The current study aims to use orbital remote sensing techniques to assess human impacts on changes in land use and land cover (LULC) after the establishment of PEMP in the semi-arid region known as Caatinga, in Pernambuco State. The effects of this unit on vegetation preservation were specifically analyzed based on using data from the MapBiomas Brasil project to assess trends in LULC, both in and around PEMP, from 2002 to 2020. Man–Kendall and Pettitt statistical tests were applied to identify significant changes, such as converting forest areas into pastures and agricultural plantations. Trends of the loss and gain of LULC were observed over the years, such as forest areas’ conversion into pasture and vice versa, mainly before and after PEMP implementation. These findings highlight the importance of developing conservation measures and planning to help protecting the Caatinga, which is a vital biome in Brazil.