Effects of swift heavy ions on metal nanoparticles embedded in silica: Using linearly polarized light to monitor the elongation kinetics.

The elongation of metallic nanoparticles (NPs) embedded in a dielectric matrix after irradiation with swift heavy ions is a phenomenon that has been known for several years. However, the precise mechanism behind this deformation process is still not fully understood, primarily due to the dearth of information during intermediate stages of deformation. In this study, we report the continuation of our previous work [Peña-Rodríguez et al., Sci. Rep. 7(1), 922 (2017)], exploiting the strong dependence of the localized surface plasmon resonance on the aspect ratio of elongated metal NPs to study the elongation kinetics in situ. In situ optical absorption spectra were measured using a polarizing beam splitter to separate the longitudinal and transverse plasmon modes of the anisotropic NPs. Then, the detailed geometrical and compositional parameters were determined from a fit of these spectra. The use of linearly polarized light allowed for a more accurate analysis of the elongation kinetics, particularly useful in the first stages, where longitudinal and transverse modes overlap.

[Evaluation of Implementation of the HEARTS Initiative in a Rural Community in Venezuela, 2023Avaliação da implementação da iniciativa HEARTS em uma comunidade rural da Venezuela, 2023]. / Evaluación de la implementación de la iniciativa HEARTS en una comunidad rural de Venezuela, 2023.

Objective: To evaluate the implementation of HEARTS strategies in a community in the Bolivarian Republic of Venezuela. Methods: Quasi-experimental study evaluating the cascade of care, driving factors, and maturity and performance indicators four months after implementation of the HEARTS initiative in 52 patients with high blood pressure (BP) in the community of La Marroquina. The data were processed using SPSS® Statistics, version 25.0. Student's t-distribution and chi-square tests were applied to determine statistical significance. Results: Fifty patients, 63.5% of them with a low educational level and low or very low socioeconomic status, completed the four-month monitoring period. At baseline, 11.5% had controlled BP and 40.4% initiated monotherapy. By the fourth month, 100% of patients with high BP had been diagnosed, 92% had received treatment, and 52% had achieved control of their BP. Seventy-two percent were receiving combined therapy. Seventy percent of the hypertensive individuals maintained blood pressure levels <140/90 mmHg. The maturity index score was 4 of 5, and the performance index was classified as incipient. Conclusion: This work shows that, in a short time, a good maturity index was achieved through the implementation, by medical and supervised non-medical personnel, of a standardized protocol for diagnosis, treatment, and monitoring of high blood pressure in a rural population. Rates of diagnosis, treatment, and BP control improved, with incipient performance results. Sustaining this initiative will have a major impact on the health of this population. Its implementation as a national public health policy is recommended.

Objetivo: Avaliar a implementação das estratégias da iniciativa HEARTS em uma comunidade da República Bolivariana da Venezuela. Métodos: Estudo quase-experimental que avaliou a cascata de cuidados, fatores determinantes e índices de maturidade e desempenho quatro meses após a implementação da iniciativa HEARTS na comunidade de La Marroquina, Venezuela. Foram avaliados 52 pacientes com hipertensão arterial. A análise estatística foi realizada no software SPSS®, versão 25.0. O teste t de Student e o teste qui-quadrado foram usados para determinar a significância estatística. Resultados: Cinquenta pacientes completaram o acompanhamento de quatro meses. Desses, 63,5% tinham baixa escolaridade e nível socioeconômico baixo ou muito baixo. No início do estudo, 11,5% apresentavam doença controlada e 40,4% estavam em monoterapia. No quarto mês, 100% dos pacientes com hipertensão arterial haviam sido diagnosticados, 92% haviam recebido tratamento, 52% haviam atingido a meta de controle da hipertensão e 72% estavam recebendo terapia combinada. Dos pacientes com hipertensão, 70% mantinham níveis pressóricos <140 × 90 mmHg. O índice de maturidade foi avaliado como nível 4 (de 5), e o desempenho foi classificado como incipiente. Conclusão: Este estudo demonstra, após pouco tempo, um bom índice de maturidade na implementação de um protocolo padronizado de diagnóstico, tratamento e acompanhamento da hipertensão arterial em uma população rural atendida por pessoal médico e não médico supervisionado. Observa-se melhoria das taxas de diagnóstico, tratamento e controle dos pacientes com hipertensão, demonstrando de forma incipiente seu desempenho. Dar continuidade a essa iniciativa terá uma repercussão importante na saúde dessa população. Recomendando-se que a iniciativa seja implementada como política nacional de saúde pública.

The predictive model of hydrobiological diversity in the Asana-Tumilaca basin, Peru based on water physicochemical parameters and sediment metal content.

The hydrobiological diversity in the basin depends on biotic and abiotic factors. A predictive model of hydrobiological diversity for periphyton and macrobenthos was developed through multiple linear regression analysis (MLRA) based on the physicochemical parameters of water (PPW) and metal content in sediments (MCS) from eight monitoring stations in the Asana-Tumilaca Basin during the dry and wet seasons. The electrical conductivity presented values between 47.9 and 3617 µS/cm, showing the highest value in the Capillune River due to the influence of geothermal waters. According to Piper's diagram, the water in the basin had a composition of calcium sulfate and calcium bicarbonate-sulfate. According to the Wilcox diagram, the water was found to be between good and very good quality, except for in the Capillune River. The Shannon-Wiener diversity indices (H') were 2.62 and 2.88 for periphyton, and 2.10 and 2.44 for macrobenthos, indicating moderate diversity; for the Pielou's evenness index (J'), they were 0.68 and 0.70 for periphyton, and 0.68 and 0.59 for macrobenthos, indicating similar equity, in the dry and wet seasons, respectively, for both indices. In the model there were three cases, where the first two cases only worked with PPW or MCS, and case 3 worked with PPW and MCS. For case 3, the predicted values for H' and J' of periphyton and macrobenthos concerning those observed presented correlation coefficients of 0.7437 and 0.6523 for periphyton and 0.9321 and 0.8570 for macrobenthos, respectively, which were better than those of cases 1 and 2. In addition, principal component analysis revealed that the As, Pb, and Zn contents in the sediments negatively influenced the diversity, uniformity, and richness of the macrobenthos. In contrast, Cu and Cr had positive impacts because of the adaptation processes.

Application of the galactomannan gel from Cassia grandis seeds for biomedical purposes: Study of the incorporation of collagenases and their release profile.

The galactomannan-based gel from Cassia grandis seeds was used to incorporate Penicillium sp. UCP 1286 and commercial collagenases. Experiments were carried out according to a 23-full factorial design to identify the most significant parameters for the incorporation process. The pH of the incorporation solution (pHi), stirring time (t), and initial protein concentration in the crude extract (PCi) were selected as the three independent variables, and the efficiency of collagenase incorporation (E) and collagenolytic activity (CA) after 360 min as the responses. pHi and PCi showed positive statistically significant effects on E, while CA was positively influenced by pHi and t, but negatively by PCi. The fungi collagenase was released from the gel following a pseudo-Fickian behavior. Additionally, no <76 % of collagenase was efficiently incorporated into the gel retaining a high CA (32.5-69.8 U/mL). The obtained results for the commercial collagenase (E = 93.88 %, CA = 65.8 U/mL, and n = 0.10) demonstrated a pseudo-Fickian behavior similar to the fungi-collagenase. The results confirm the biotechnological potential of the gel as an efficient matrix for the incorporation of catalytic compounds; additionally, the incorporation of collagenases was achieved by retaining the proteases CA and releasing them in a controlled manner.

Prescrição farmacêutica em farmácias comunitárias públicas e privadas de Vitória-ES: barreiras e facilitadores para a implementação da atividade / Pharmacist prescribing in public and private community drugstores in Vitória, Espírito Santo State: barriers and facilitators for the implementation of the activity

Resumo A prescrição farmacêutica avança no mundo, com diferentes países regulando a prática. No Brasil, essa regulação ocorreu em 2013, porém são escassas as informações sobre sua inserção no cotidiano do exercício farmacêutico. Este estudo objetivou analisar a prescrição farmacêutica no município de Vitória-ES, Brasil, e os fatores que influenciam na adesão da prática. Trata-se de um estudo qualitativo com 20 farmacêuticos e 10 gestores de farmácias comunitárias públicas e privadas, realizado a partir de entrevistas, com posterior análise de conteúdo temática para apreender percepções e opiniões. Os farmacêuticos desta pesquisa não prescreviam. Farmacêuticos e gestores identificaram facilitadores para a implementação da atividade, com destaque para os fatores: infraestrutura; fácil acesso ao farmacêutico; e boa receptividade à prescrição. Como barreiras, os fatores foram: número insuficiente de recursos humanos; falta de estímulo institucional à prescrição; e fatores individuais. Além da observação da não execução da prescrição farmacêutica, este estudo trouxe uma oportunidade para identificar elementos que podem estar contribuindo para que o exercício dessa atividade não seja realizado nas farmácias comunitárias. Adaptar rotinas ou contratar pessoal se mostraram as principais modificações necessárias. Paralelamente, ações destinadas a qualificar a formação por meio da educação permanente também se apresentam como necessárias.

Abstract Pharmacist prescribing advances in the world with different countries regulating this activity. In Brazil, this regulation took place in 2013, but there is little information about its insertion in the routine of pharmacist practice. This study aimed to analyze the pharmacist prescribing in the city of Vitória, Espírito Santo state, Brazil, and the factors that influence adherence to the practice. This is a qualitative study based on interviews with 20 pharmacists and 10 managers of public and private community drugstores with subsequent content analysis to apprehend perceptions and opinions. The pharmacists in this research did not prescribe. Pharmacists and managers identified facilitators for the implementation of the activity, highlighting the following factors: infrastructure; easy access to the pharmacist; and good receptivity to the prescription. As barriers, the factors were insufficient number of human resources; lack of institutional stimulus to prescribing; and individual factors. In addition to the observation of non-execution of pharmacist prescribing, this study provided an opportunity to identify elements that may contribute to the non-existence of this activity in community drugstores. Adapting routines or hiring staff were the main necessary changes. At the same time, actions aimed at qualifying training through permanent education are also necessary.

AC-PLT: An algorithm for computer-assisted coding of semantic property listing data.

In this paper, we present a novel algorithm that uses machine learning and natural language processing techniques to facilitate the coding of feature listing data. Feature listing is a method in which participants are asked to provide a list of features that are typically true of a given concept or word. This method is commonly used in research studies to gain insights into people's understanding of various concepts. The standard procedure for extracting meaning from feature listings is to manually code the data, which can be time-consuming and prone to errors, leading to reliability concerns. Our algorithm aims at addressing these challenges by automatically assigning human-created codes to feature listing data that achieve a quantitatively good agreement with human coders. Our preliminary results suggest that our algorithm has the potential to improve the efficiency and accuracy of content analysis of feature listing data. Additionally, this tool is an important step toward developing a fully automated coding algorithm, which we are currently preliminarily devising.

Approaching Self-Bonded Medium Density Fiberboards Made by Mixing Steam Exploded Arundo donax L. and Wood Fibers: A Comparison with pMDI-Bonded Fiberboards on the Primary Properties of the Boards.

This study presents an unexplored method to produce formaldehyde-free MDF. Steam exploded Arundo donax L. (STEX-AD) and untreated wood fibers (WF) were mixed at different mixing rates (0/100, 50/50, and 100/0, respectively) and two series of boards were manufactured, with 4 wt% of pMDI, based on dry fibers, and self-bonded. The mechanical and physical performance of the boards was analyzed as a function of the adhesive content and the density. The mechanical performance and dimensional stability were determined by following European standards. The material formulation and the density of the boards had a significant effect on both mechanical and physical properties. The boards made solely of STEX-AD were comparable to those made with pMDI, while the panels made of WF without adhesive were those that performed the worst. The STEX-AD showed the ability to reduce the TS for both pMDI-bonded and self-bonded boards, although leading to a high WA and a higher short-term absorption for the latter. The results presented show the feasibility of using STEX-AD in the manufacturing of self-bonded MDF and the improvement of dimensional stability. Nonetheless, further studies are needed especially to address the enhancement of the internal bond (IB).

Parthenolide inhibits proliferation and invasion, promotes apoptosis, and reverts the cell-cell adhesion loss through downregulation of NF-κB pathway TNF-α-activated in colorectal cancer cells.

The activation of the nuclear factor-κB (NF-κB) pathway has been associated with the development and progression of colorectal cancer (CRC). Parthenolide (PTL), a well-known inhibitor of the NF-κB pathway, has emerged as an alternative treatment. However, whether PTL activity is tumor cell-specific and dependent on the mutational background has not been defined. This study investigated the antitumor role of PTL after tumor necrosis factor-α (TNF-α) stimulation in various CRC cell lines with different mutational statuses of TP53. We observed that CRC cells displayed different patterns of basal p-IκBα levels; PTL reduced cell viability according to p-IκBα levels and p-IκBα levels varied among the cell lines according to the time of TNF-α stimulation. High concentrations of PTL reduced more effectively p-IκBα levels than low doses of PTL. However, PTL increased total IκBα levels in Caco-2 and HT-29 cells. In addition, PTL treatment downregulated p-p65 levels in HT-29 and HCT-116 cells stimulated by TNF-α in a dose-dependent manner. Moreover, PTL induced cell death via apoptosis and reduced the proliferation rate of TNF-α-treated HT-29 cells. Finally, PTL downregulated the messenger RNA levels of interleukin-1ß, a downstream cytokine of NF-κB, reverted the E-cadherin-mediated disorganization of cell-cell contacts, and decreased the invasion of HT-29 cells. Together, these results suggest a differential antitumoral activity of PTL on CRC cells with different mutational statuses of TP53, modulating cell death, survival, and proliferation underlying the NF-κB pathway TNF-α-induced. Therefore, PTL has emerged as a potential treatment for CRC in an inflammatory NF-κB-dependent manner.

Yeast-amoeba interaction influences murine cryptococcosis.

The virulence of Cryptococcus spp. is modulated in the natural environment through interaction with abiotic and biotic factors, and this can occasionally have implications for the progression of cryptococcosis in mammals. Hence, we evaluated whether the prior interaction of highly virulent Cryptococcus gattii strain R265 with Acanthamoeba castellanii influenced the progression of cryptococcosis. The influence of the capsule on endocytosis was evaluated using amoeba and yeast morphometrics. Mice were intratracheally infected with yeast re-isolated from the amoeba (Interaction), yeast without prior contact with the amoeba (Non-Interaction), or sterile phosphate-buffered saline (SHAM). Morbidity signs and symptoms were monitored during the survival curve, while cytokine and fungal burden measurements and histopathological analysis were performed on the 10th day post infection. Morbidity and mortality parameters in experimental cryptococcosis were influenced by the prior interaction of yeast with amoeba, which led to phenotypic changes in the cryptococcal cells, polysaccharide secretion, and their tolerance to oxidative stress. Our results suggest that a prior yeast-amoeba interaction modulates yeast virulence, which is associated with a greater tolerance to oxidative stress related to the exo-polysaccharide content and influences the progression of cryptococcal infection.

Particles' Organization in Direct Oil-in-Water and Reverse Water-in-Oil Pickering Emulsions.

This paper addresses the impact of the particle initial wetting and the viscosity of the oil phase on the structure and rheological properties of direct (Oil/Water) and reverse (Water/Oil) Pickering emulsions. The emulsion structure was investigated via confocal microscopy and static light scattering. The flow and viscoelastic properties were probed by a stress-controlled rheometer. Partially hydrophobic silica particles have been employed at 1 and 4 wt.% to stabilize dodecane or paraffin-based emulsions at 20 vol.% of the dispersed phase. W/O emulsions were obtained when the particles were dispersed in the oily phase while O/W emulsions were prepared when the silica was introduced in the aqueous phase. We demonstrated that, although the particles adsorbed at the droplets interfaces for all the emulsions, their organization, the emulsion structure and their rheological properties depend in which phase they were previously dispersed in. We discuss these features as a function of the particle concentration and the oil viscosity.