Engineering Metal Halide Perovskite Nanocrystals with BODIPY Dyes for Photosensitization and Photocatalytic Applications.

The sensitization of surface-anchored organic dyes on semiconductor nanocrystals through energy transfer mechanisms has received increasing attention owing to their potential applications in photodynamic therapy, photocatalysis, and photon upconversion. Here, we investigate the sensitization mechanisms through visible-light excitation of two nanohybrids based on CsPbBr3 perovskite nanocrystals (NC) functionalized with borondipyrromethene (BODIPY) dyes, specifically 8-(4-carboxyphenyl)-1,3,5,7-tetramethyl-4,4-difluoro-4-bora-3a,4a-diaza-s-indacene (BDP) and 8-(4-carboxyphenyl)-2,6-diiodo-1,3,5,7-tetramethyl-4,4-difluoro-4-bora-3a,4a-diaza-s-indacene (I2-BDP), named as NC@BDP and NC@I2-BDP, respectively. The ability of I2-BDP dyes to extract hot hole carriers from the perovskite nanocrystals is comprehensively investigated by combining steady-state and time-resolved fluorescence as well as femtosecond transient absorption spectroscopy with spectroelectrochemistry and quantum chemical theoretical calculations, which together provide a complete overview of the phenomena that take place in the nanohybrid. Förster resonance energy transfer (FRET) dominates (82%) the photosensitization of the singlet excited state of BDP in the NC@BDP nanohybrid with a rate constant of 3.8 ± 0.2 × 1010 s-1, while charge transfer (64%) mediated by an ultrafast charge transfer rate constant of 1.00 ± 0.08 × 1012 s-1 from hot states and hole transfer from the band edge is found to be mainly responsible for the photosensitization of the triplet excited state of I2-BDP in the NC@I2-BDP nanohybrid. These findings suggest that the NC@I2-BDP nanohybrid is a unique energy transfer photocatalyst for oxidizing α-terpinene to ascaridole through singlet oxygen formation.

The role of the oxime group in the excited state deactivation processes of indirubin.

The introduction of an oxime group into indirubin (INR) derivatives, including INROx, MINROx, and 6-BrINROx, and its impact on the spectral and photophysical properties of INR was investigated using a combination of fast-transient absorption (fs-TA/fs-UC) and steady-state fluorescence techniques. The oxime group introduces structural modifications that promote a rapid keto-enol tautomeric equilibrium and enhance the excited-state proton transfer (ESPT) process compared to its analogue, INR. In the oxime-indirubin derivatives investigated, the ESPT process is notably more efficient than what is observed in INR and indigo, occurring extremely fast (<1 ps) in all solvents, except for the viscous solvent glycerol. The more rapid deactivation mechanism precludes the formation of an intermediate species (syn-rotamer), as observed with INR. These findings are corroborated by time-dependent density functional theory (TDDFT) calculations. The work demonstrates that introducing an oxime group to INR, whether in nature or in the laboratory, results in an enhancement of its photostability.

[Body image dissatisfaction and low adherence to the Western dietary standard among schoolchildren: a cross-sectional study]. / Insatisfação com a imagem corporal e baixa aderência ao padrão alimentar ocidental em escolares: um estudo transversal.

This study aimed to identify dietary patterns and to evaluate the association between body image perception and these patterns among schoolchildren. A cross-sectional study was conducted on 385 schoolchildren (both sexes, 10-17 years old) from four public schools in Salvador, Brazil. Two non-consecutive 24-hour dietary recalls were applied, and the dietary pattern was determined by Exploratory Factor Analysis after adjustment of dietary data using the Multiple Source Method. To evaluate body image perception, the Brazilian body shape silhouette was used. The associations between body image perception and dietary patterns using the polytomous logistic regression model adjusted for covariables was assessed. Three dietary patterns were obtained: "Western standard," unhealthy, "healthy pattern" and "typical dishes/ junk food." After adjustment, adolescents who wished for a slimmer silhouette (2.48 [95%CI: 1.04-6.11], 3.49 [95%CI: 1.35-9.05] and 2.87 [95%CI: 1.13-7.26]) were more likely to adhere to the quintiles with the lowest consumption of the Western standard, compared to those satisfied with their body image. No associations were identified in the other two dietary patterns. Adolescents dissatisfied with their bodies tend to adhere less to unhealthy dietary patterns.

Este estudo objetivou identificar padrões alimentares e avaliar a associação entre percepção da imagem corporal e esses padrões em escolares. Um estudo transversal foi conduzido em 385 escolares (ambos os sexos, 10-17 anos de idade) de 4 escolas públicas de Salvador, Brasil. Dois recordatórios alimentares de 24h não consecutivos foram aplicados e o padrão alimentar foi determinado por Análise Fatorial Exploratória, após ajuste dos dados dietéticos pelo Multiple Source Method. Para avaliar percepção da imagem corporal, nós usamos uma escala brasileira de silhuetas. Avaliamos as associações entre percepção da imagem corporal e padrões alimentares usando o modelo de regressão logística politômica ajustado para covariáveis. Três padrões alimentares foram obtidos: "padrão ocidental", "padrão saudável" e "comidas típicas/junk food". Após ajuste, adolescentes que desejavam uma silhueta menor (2,48 [IC95%: 1,04-6,11], 3,49 [IC95%: 1,35-9,05] e 2,87 [IC95%: 1,13-7,26]) tinham mais chances de aderir aos quintis de menor consumo do padrão ocidental, comparados àqueles satisfeitos com sua imagem corporal. Nenhuma associação foi identificada nos outros dois padrões alimentares. Adolescentes insatisfeitos com seus corpos tendem a aderir menos a padrões alimentares não saudáveis.

Diagnosis and treatment of eating disorders in children and adolescents.

OBJECTIVES: To provide a narrative review of the main eating disorders (ED), specifically focusing on children and adolescents. This review also aims to help the pediatrician identify, diagnose, and refer children and adolescents affected by this medical condition and inform them about the multidisciplinary treatment applied to these disorders. DATA SOURCE: The research was conducted in the Scientific Electronic Library Online (SciELO), Medical Literature Analysis and Retrieval System Online (Medline) databases via PubMed and Embase. Consolidated Guidelines and Guidebooks in the area were also included in the review to support the discussion of ED treatment in childhood and adolescence. DATA SYNTHESIS: ED are psychiatric condition that usually begins in adolescence or young adulthood but can occur at any time of life, including in childhood, which has been increasingly frequent. Pediatricians are the first professionals to deal with the problem and, therefore, must be well trained in identifying and managing these disorders, which can be severe, and determine physical complications and quality of life of patients and their families. CONCLUSION: ED has shown an increase in prevalence, as well as a reduction in the age of diagnosed patients, requiring adequate detection and referral by pediatricians. The treatment requires a specialized multidisciplinary team and is generally long-lasting for adequate recovery of affected individuals.

Insatisfação com a imagem corporal e baixa aderência ao padrão alimentar ocidental em escolares: um estudo transversal / Body image dissatisfaction and low adherence to the Western dietary standard among schoolchildren: a cross-sectional study

Resumo Este estudo objetivou identificar padrões alimentares e avaliar a associação entre percepção da imagem corporal e esses padrões em escolares. Um estudo transversal foi conduzido em 385 escolares (ambos os sexos, 10-17 anos de idade) de 4 escolas públicas de Salvador, Brasil. Dois recordatórios alimentares de 24h não consecutivos foram aplicados e o padrão alimentar foi determinado por Análise Fatorial Exploratória, após ajuste dos dados dietéticos pelo Multiple Source Method. Para avaliar percepção da imagem corporal, nós usamos uma escala brasileira de silhuetas. Avaliamos as associações entre percepção da imagem corporal e padrões alimentares usando o modelo de regressão logística politômica ajustado para covariáveis. Três padrões alimentares foram obtidos: "padrão ocidental", "padrão saudável" e "comidas típicas/junk food". Após ajuste, adolescentes que desejavam uma silhueta menor (2,48 [IC95%: 1,04-6,11], 3,49 [IC95%: 1,35-9,05] e 2,87 [IC95%: 1,13-7,26]) tinham mais chances de aderir aos quintis de menor consumo do padrão ocidental, comparados àqueles satisfeitos com sua imagem corporal. Nenhuma associação foi identificada nos outros dois padrões alimentares. Adolescentes insatisfeitos com seus corpos tendem a aderir menos a padrões alimentares não saudáveis.

Abstract This study aimed to identify dietary patterns and to evaluate the association between body image perception and these patterns among schoolchildren. A cross-sectional study was conducted on 385 schoolchildren (both sexes, 10-17 years old) from four public schools in Salvador, Brazil. Two non-consecutive 24-hour dietary recalls were applied, and the dietary pattern was determined by Exploratory Factor Analysis after adjustment of dietary data using the Multiple Source Method. To evaluate body image perception, the Brazilian body shape silhouette was used. The associations between body image perception and dietary patterns using the polytomous logistic regression model adjusted for covariables was assessed. Three dietary patterns were obtained: "Western standard," unhealthy, "healthy pattern" and "typical dishes/ junk food." After adjustment, adolescents who wished for a slimmer silhouette (2.48 [95%CI: 1.04-6.11], 3.49 [95%CI: 1.35-9.05] and 2.87 [95%CI: 1.13-7.26]) were more likely to adhere to the quintiles with the lowest consumption of the Western standard, compared to those satisfied with their body image. No associations were identified in the other two dietary patterns. Adolescents dissatisfied with their bodies tend to adhere less to unhealthy dietary patterns.

Weight stigma is a predictor of disordered eating in Brazilian college students during the COVID-19 pandemic: A 16-month cohort follow-up.

This study examined the relationship between weight stigma and disordered eating behaviors in university students during the COVID-19 pandemic, considering individuals with and without overweight. A national sample of 738 college students completed an online questionnaire at three time points between July 2020 and December 2021, reporting their experiences of weight stigma, perceived increase in weight stigma during the pandemic, internalized weight stigma, and disordered eating behaviors. The findings showed that the trajectories of disordered eating behaviors varied depending on participants' anthropometric status. Among those with overweight, there was a decrease over time in binge eating, food restriction, and purging. Conversely, the non-overweight group experienced a slight increase in binge eating from T2 to T3. Using the Generalized Estimating Equations model, the study revealed that weight stigma predicted disordered eating behaviors in both weight spectrums during the pandemic. Experiences of weight stigma and the perceived increase in weight stigma significantly increased the likelihood of engaging in binge eating, food restriction, and purging among individuals with overweight. Furthermore, the internalization of weight stigma was longitudinally associated with all examined eating behaviors, regardless of anthropometric status. These findings highlight the importance of addressing weight stigma to prevent disordered eating in college students.

Análise do conhecimento, das atitudes e das práticas de médicos e enfermeiros sobre as vivências de cuidadores familiares de pessoas idosas com demência: um estudo CAP / Analysis of knowledge, attitudes, and practices of physicians and nurses regarding the experiences of family caregivers of older adults with dementia: a KAP study

Resumo Objetivo analisar o Conhecimento, Atitudes e Práticas (CAP) dos profissionais de saúde, durante a assistência às pessoas idosas vivendo com demência em relação às situações de cuidado vivenciadas pelos cuidadores informais e a associação com fatores sociodemográficos e profissionais. Método estudo transversal e analítico, do tipo CAP, realizado no município de Tangará da Serra, Mato Grosso, Brasil, com 20 enfermeiros e 20 médicos das Unidades de Saúde da Família. Os dados foram coletados por meio de entrevista utilizando-se um instrumento desenvolvido a partir da literatura disponível sobre estudos CAP. Realizou-se análise descritiva e análise bivariada da associação entre as variáveis conhecimento, atitudes e práticas dos profissionais de saúde e as variáveis sociodemográficas e profissionais, utilizando o teste exato de Fisher, com nível de significância de 5%. Resultados os profissionais de saúde apresentaram conhecimento satisfatório e atitude favorável sobre as situações de cuidado vivenciadas pelos cuidadores informais de pessoas idosas vivendo com demência. Dos profissionais, 65% possuem práticas insuficientes direcionadas aos cuidadores, incluindo orientações, grupos de apoio e educação em saúde. Não houve associação significativa entre as variáveis conhecimento, atitudes e práticas e as variáveis sociodemográficas e profissionais. Conclusão embora os profissionais de saúde tenham conhecimento satisfatório sobre a situação de cuidado vivenciada pelos cuidadores e atitudes positivas em relação a eles, suas práticas se mostram insuficientes para atender suas necessidades, de forma a não contribuir para que os cuidadores possam lidar com as várias situações que o decorrer da doença ocasiona para a pessoa idosa e a eles.

Abstract Objective To analyze the Knowledge, Attitudes, and Practices (KAP) of healthcare professionals during the care of older individuals living with dementia, concerning the caregiving situations experienced by informal caregivers, and its association with sociodemographic and professional factors. Method A cross-sectional analytical KAP study was conducted in the municipality of Tangará da Serra, Mato Grosso, with 20 nurses and 20 physicians from Family Health Units. Data were collected through interviews using an instrument developed based on the available literature on KAP studies. Descriptive analysis and bivariate analysis of the association between the knowledge, attitudes, and practices of healthcare professionals and sociodemographic and professional variables were performed using the Fisher's exact test, with a significance level of 5%. Results Healthcare professionals demonstrated satisfactory knowledge and favorable attitudes towards caregiving situations experienced by informal caregivers of older individuals living with dementia. However, 65% of professionals exhibited insufficient practices directed at caregivers, including guidance, support groups, and health education. No significant association was found between knowledge, attitudes, practices, and sociodemographic or professional variables. Conclusion Despite healthcare professionals possessing satisfactory knowledge of caregiving situations and positive attitudes towards informal caregivers, their practices are inadequate in meeting their needs. This deficiency does not contribute to enabling caregivers to cope with the various challenges that arise during the course of the disease for both the older individual and the caregivers themselves.

Single-Atoms on Crystalline Carbon Nitrides for Selective C─H Photooxidation: A Bridge to Achieve Homogeneous Pathways in Heterogeneous Materials.

Single-atom catalysis is a field of paramount importance in contemporary science due to its exceptional ability to combine the domains of homogeneous and heterogeneous catalysis. Iron and manganese metalloenzymes are known to be effective in C─H oxidation reactions in nature, inspiring scientists to mimic their active sites in artificial catalytic systems. Herein, a simple and versatile cation exchange method is successfully employed to stabilize low-cost iron and manganese single-atoms in poly(heptazine imides) (PHI). The resulting materials are employed as photocatalysts for toluene oxidation, demonstrating remarkable selectivity toward benzaldehyde. The protocol is then extended to the selective oxidation of different substrates, including (substituted) alkylaromatics, benzyl alcohols, and sulfides. Detailed mechanistic investigations revealed that iron- and manganese-containing photocatalysts work through a similar mechanism via the formation of high-valent M═O species. Operando X-ray absorption spectroscopy (XAS) is employed to confirm the formation of high-valent iron- and manganese-oxo species, typically found in metalloenzymes involved in highly selective C─H oxidations.

Habits and Persistent Food Restriction in Patients with Anorexia Nervosa: A Scoping Review.

The aetiology of anorexia nervosa (AN) presents a puzzle for researchers. Recent research has sought to understand the behavioural and neural mechanisms of these patients' persistent choice of calorie restriction. This scoping review aims to map the literature on the contribution of habit-based learning to food restriction in AN. PRISMA-ScR guidelines were adopted. The search strategy was applied to seven databases and to grey literature. A total of 35 studies were included in this review. The results indicate that the habit-based learning model has gained substantial attention in current research, employing neuroimaging methods, scales, and behavioural techniques. Food choices were strongly associated with dorsal striatum activity, and habitual food restriction based on the self-report restriction index was associated with clinical impairment in people chronically ill with restricting AN. High-frequency repetitive transcranial magnetic stimulation (HF-rTMS) and Regulating Emotions and Changing Habits (REaCH) have emerged as potential treatments. Future research should employ longitudinal studies to investigate the time required for habit-based learning and analyse how developmental status, such as adolescence, influences the role of habits in the progression and severity of diet-related illnesses. Ultimately, seeking effective strategies to modify persistent dietary restrictions controlled by habits remains essential.

Weight stigma and disordered eating behaviors during the COVID-19 pandemic: the mediating role of weight gain concern and psychological distress.

OBJECTIVES: The purpose of this study is to investigate whether the relationship between weight stigma experiences and disordered eating behaviors during the COVID-19 pandemic is mediated by weight gain concern and psychological distress among university students with and without overweight. METHODS: A cross-sectional study was conducted with university students from five regions of Brazil who participated in the baseline assessment of the Online Cohort on Eating Behavior and Health (July/August 2020). Information on the frequency of binge eating episodes, food restriction, and purging, as well as experienced weight stigma, weight gain concern, and psychological distress, were recorded in an online questionnaire. Stratified structural equation modeling (SEM) analyses were performed to address the research questions of interest. RESULTS: Out of the total sample (n = 2511), 33.5% of participants reported experiencing weight stigma. The prevalence of binge eating episodes, food restriction, and purging was 43.7%, 24.1%, and 5.4%, respectively. These behaviors were more prevalent in individuals with overweight than in those without this condition. Furthermore, it was observed that weight gain concern and psychological distress mediated the relationship between weight stigma and disordered eating behaviors regardless of body weight status. CONCLUSIONS: Experiences of weight stigma and disordered eating behaviors were prevalent among Brazilian university students, especially among those with overweight. Weight gain concern and psychological distress appear to be important factors underlying the relationship between these constructs during the pandemic, and they can contribute to the development of targeted strategies for the prevention and management of disordered eating. LEVEL OF EVIDENCE: Level V, cross-sectional study.

Bruxismo como consequência do estresse pandêmico: revisão integrativa / Bruxism as a consequence of pandemic stress: integrative review

O período pandêmico com todas as suas implicações possibilitou um aumento dos níveis de estresse em parte da população, que teve como consequência a obtenção ou o agravamento do bruxismo. Objetivo: O objetivo deste artigo foi realizar uma revisão integrativa sobre como o estresse causado pela pandemia de COVID-19 influenciou no desenvolvimento do bruxismo, considerando o perfil dos indivíduos acometidos. Realizou-se uma revisão integrativa da literatura a partir da seleção de artigos publicados nas bases de dados BVS, PubMed e EBSCOhost. Para isto, a seguinte questão de pesquisa foi formulada: "Existe relação entre o bruxismo e a pandemia de COVID-19?". A busca objetivou encontrar artigos publicados em português, espanhol e inglês, durante os anos de 2019 a 2023, utilizando os descritores "bruxismo", "COVID-19" e "estresse psicológico" e as suas respectivas versões em inglês, juntamente com a estratégia de busca AND. Revisão de literatura: Vinte estudos foram incluídos, ficando evidente uma prevalência do bruxismo como consequência do estresse pandêmico em pessoas jovens, do sexo feminino, além de estudantes/profissionais da área da saúde. Considerações finais: Acredita-se que a pandemia de COVID-19 vivenciada entre os anos de 2019 e 2023 tenha causado e/ou exacerbado estresse, sendo este um importante fator causador do bruxismo.(AU)

The pandemic period with all its implications allowed an increase in stress levels in part of the population, which resulted in the obstruction or worsening of bruxism. Objective: The aim of this article was to carry out an integrative review on how the stress caused by the COVID-19 pandemic influenced the development of bruxism, considering the profile of affected individuals. Method: An integrative literature review was carried out based on the selection of articles published in the VHL, PubMed and EBSCOhost databases. For this, the following research question was formulated: "Is there a relationship between bruxism and the COVID-19 pandemic?". The search aimed to find articles published in Portuguese, Spanish and English, during the years 2019 to 2023, using the descriptors "bruxism", "COVID-19" and "psychological stress" and their respective versions in English, together with the strategy of search AND. Integratve review: Twenty studies were included, revealing a prevalence of bruxism as a consequence of pandemic stress in young, females, in addition to students/health professionals. Final considerations: It is believed that the COVID-19 pandemic experienced between 2019 and 2023 caused and/or exacerbated stress, which is an important factor causing bruxism.(AU)

Validation of the client satisfaction questionnaire: a pilot psychometric analysis in Portuguese routine practice.

Treatment satisfaction has been found to have good therapeu- tic results in psychotherapy, and the 18-item version of the client satisfaction questionnaire (CSQ-18) is one of the most widely used measures to evaluate it. This study sought to carry out a pilot analysis of the psychometric's properties and factorial structure, as well as validate the CSQ-18's applicability to the Portuguese population within the context of routine clinical practice. It also sought to explore the association that treatment satisfaction has with general symptoms, therapeutic alliance, and expectations at an early stage of psychotherapy. The sample comprised 98 clients who were undergoing psychotherapy in a routine practice context. All these clients completed self-reported measures for symptom assessment and therapeutic relationship, namely the clinical out- come routine evaluation-outcome measure, working alliance in- ventory, and credibility/expectancy questionnaire, in addition to the CSQ-18. The semi-confirmatory factorial analysis demon- strated that the CSQ-18 has good psychometric properties and re- vealed an association between treatment satisfaction and therapeutic alliance. The results corroborate the findings of other versions of the measure and present a good adjustment model for the semi-confirmatory factorial analysis.

Macrophage-based therapy for intervertebral disc herniation: preclinical proof-of-concept.

Intervertebral disc (IVD) degeneration and herniation is a leading cause of disability globally and a large unmet clinical need. No efficient non-surgical therapy is available, and there is an urgency for minimally invasive therapies capable of restoring tissue function. IVD spontaneous hernia regression following conservative treatment is a clinically relevant phenomenon that has been linked to an inflammatory response. This study establishes the central role of macrophages in IVD spontaneous hernia regression and provides the first preclinical demonstration of a macrophage-based therapy for IVD herniation. A rat model of IVD herniation was used to test complementary experimental setups: (1) macrophage systemic depletion via intravenous administration of clodronate liposomes (Group CLP2w: depletion between 0 and 2 weeks post-lesion; Group CLP6w: depletion between 2 and 6 weeks post-lesion), and (2) administration of bone marrow-derived macrophages into the herniated IVD, 2 weeks post-lesion (Group Mac6w). Herniated animals without treatment were used as controls. The herniated area was quantified by histology in consecutive proteoglycan/collagen IVD sections at 2 and 6 weeks post-lesion. Clodronate-mediated macrophage systemic depletion was confirmed by flow cytometry and resulted in increased hernia sizes. Bone marrow-derived macrophages were successfully administered into rat IVD hernias resulting in a 44% decrease in hernia size. No relevant systemic immune reaction was identified by flow cytometry, cytokine, or proteomic analysis. Furthermore, a possible mechanism for macrophage-induced hernia regression and tissue repair was unveiled through IL4, IL17a, IL18, LIX, and RANTES increase. This study represents the first preclinical proof-of-concept of macrophage-based immunotherapy for IVD herniation.

The role of solvents and concentrations in the properties of oxime bearing A2B corroles.

A comprehensive study on the electronic spectral, photophysical and acid-base properties of phenyl- and methyl-oxime corrole derivatives and of triphenylcorrole (model corrole) has been performed, aiming to shed light on the existing species in the ground and excited states. Solvents and corrole concentration are found to govern the properties of the studied compounds and are determinants of their applicability in in vivo studies. In THF, the neutral corrole has two tautomeric forms (T1 and T2). In DMSO, the deprotonated form shows a characteristic long-wavelength Q band slightly shifted to blue when compared with the T1 tautomer and a higher fluorescence quantum yield. In ACN, with the increase of the corrole concentration formation of an aggregate due to homoconjugation (with dimer characteristics) is observed, and pioneeringly reported using UV-Vis and fluorescence studies and confirmed by carrying out titrations with TFA. The effect of the oxime group on the pK values of a corrole is found to influence the formation of a homoconjugate, namely by precluding its formation (at higher concentrations) when compared with the model corrole. TDDFT electronic quantum calculations support the experimental observations, namely the existence of tautomers and deprotonated species, with their respective electronic spectral features, further allowed proposing a structure for the homoconjugate complex in ACN. The characteristics of the oxime-corroles, namely a pK of ∼ 5, absorption and emission at ca. 650 nm and solvent dependent properties, make them good candidates for their use in biological systems either as probes, sensors, or as new sensitizers for photodynamic therapy.

Handgrip strength is associated with 12-month survival in male patients suffering with advanced chronic liver disease.

BACKGROUND: Advanced chronic liver disease (ACLD) patients are usually malnourished, and both conditions in combination increase the likelihood of unfavourable clinical outcomes. Handgrip strength (HGS) has been suggested as a relevant parameter for nutritional assessment and predictor of adverse clinical outcomes in ACLD. However, the HGS cut-off values for ACLD patients have not yet been reliably established. The aims of this study were to preliminarily identify HGS reference values in a sample population of ACLD male patients and to assess their association with survival over a 12-month follow-up period. METHODS: This was a prospective observational study with preliminary analysis of outpatients and inpatients. A total of 185 male patients with a medical diagnosis of ACLD met the inclusion criteria and were invited to participate in the study. The physiological variation in muscle strength related to the age of the individuals included in the study was considered to obtain cut-off values. RESULTS: After categorising HGS by age group (adults: 18-60 years; elderly: ≥60 years), the reference values obtained were 32.5 kg for the adults and 16.5 kg for the elderly. During the 12-month follow-up, 20.5% of the patients died, and 76.3% of those had been identified with reduced HGS. CONCLUSIONS: Patients with adequate HGS showed significantly higher 12-month survival than those with reduced HGS within the same period. Our findings show that HGS is an important predictive parameter for clinical and nutritional follow-up in ACLD male patients.

Adesão de enfermeiros a um protocolo de prevenção de quedas / Nurses' adherence to a fall prevention protocol / Adherencia de enfermeros a un protocolo de prevención de caídas

Objetivo: analisar a associação entre a adesão de enfermeiros a um protocolo de prevenção de quedas e as variáveis demográficas, profissionais e de autoeficácia. Método: estudo transversal, com 23 enfermeiros de um hospital universitário de Cuiabá. Dados coletados por meio de questionário e da Escala de Autoeficácia Geral e Percebida. A medida da adesão dos enfermeiros ao protocolo de prevenção de quedas foi realizada pela verificação do número de registros de avaliação do risco de queda nos prontuários pelos enfermeiros nas 24 horas após admissão dos pacientes. Resultados: a idade média dos participantes foi de 37,56 anos e 91,3% eram do sexo feminino, com média de 11,43 anos de formação. Houve adesão de 39,13% ao protocolo e diferença significativa na adesão dos enfermeiros quando consideradas as clínicas (p=0,006). Conclusão: evidenciou-se associação entre a adesão de enfermeiros a um protocolo de prevenção de quedas e as unidades as quais eles trabalham. As características dos pacientes internados nessas unidades podem ter influenciado a adesão.

Objective: to analyze the association between nurses' adherence to a fall prevention protocol and demographic, professional and self-efficacy variables. Method: In this cross-sectional study, data were collected from 23 nurses at a university hospital in Cuiabá, using a self-efficacy questionnaire and the Perceived and General Self-Efficacy Scale. The nurses' adherence to the fall prevention protocol was measured by checking the number of fall risk assessment records in the nurses' records within 24 hours of patient admission. Results: participant mean age was 37.56 years and 91.3% were female, with an average of 11.43 years of training; 39.13% of the nurses adhered to the protocol and nurses' adherence differed significantly between units (p = 0.006). Conclusion: an association was found between nurses' adherence to a fall prevention protocol and the units where they worked. The characteristics of patients admitted to these units may have influenced adherence.

Objetivo: analizar la asociación entre la adhesión de enfermeros a un protocolo de prevención de caídas y las variables demográficas, profesionales y de autoeficacia. Método: estudio transversal junto a 23 enfermeros de un hospital universitario de Cuiabá. Los datos fueron recolectados a través de un cuestionario y de la Escala de Autoeficacia General. La medida de la adherencia de los enfermeros al protocolo de prevención de caídas se realizó mediante la verificación del número de registros de evaluación del riesgo de caídas en las historias de los enfermeros dentro de las 24 horas posteriores al ingreso del paciente. Resultados: la edad media de los participantes fue de 37,56 años y el 91,3% eran mujeres, con un promedio de 11,43 años de formación. La adhesión al protocolo fue del 39,13%. Hubo una diferencia significativa en la adherencia de los enfermeros en cuanto a las clínicas (p = 0,006). Conclusión: se evidenció la asociación entre la adherencia de los enfermeros a un protocolo de prevención de caídas y las unidades en las que laboran. Las características de los pacientes ingresados en estas unidades pueden haber influido en la adherencia.

Enhanced thermal and photo-stability of a para-substituted dicumyl ketone intercalated in a layered double hydroxide.

A ketodiacid, 4,4'-dicarboxylate-dicumyl ketone (3), has been intercalated into a Zn, Al layered double hydroxide (LDH) by a coprecipitation synthesis strategy. The structure and chemical composition of the resultant hybrid material (LDH-KDA3) were characterized by powder X-ray diffraction (PXRD), FT-IR, FT-Raman and solid-state 13C{1H} NMR spectroscopies, scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), thermogravimetric analysis (TGA), and elemental analysis (CHN). PXRD showed that the dicarboxylate guest molecules assembled into a monolayer to give a basal spacing of 18.0 Å. TGA revealed that the organic guest starts to decompose at a significantly higher temperature (ca. 330°C) than that determined for the free ketodiacid (ca. 230°C). Photochemical experiments were performed to probe the photoreactivity of the ketoacid in the crystalline state, in solution, and as a guest embedded within the photochemically-inert LDH host. Irradiation of the bulk crystalline ketoacid results in photodecarbonylation and the exclusive formation of the radical-radical combination product. Solution studies employing the standard myoglobin (Mb) assay for quantification of released CO showed that the ketoacid behaved as a photoactivatable CO-releasing molecule for transfer of CO to heme proteins, although the photoreactivity was low. No photoinduced release of CO was found for the LDH system, indicating that molecular confinement enhanced the photo-stability of the hexasubstituted ketone. To better understand the behavior of 3 under irradiation, a more comprehensive study, involving excitation of this compound in DMSO-d6 followed by 1H NMR, UV-Vis and fluorescence spectroscopy, was undertaken and further rationalized with the help of time-dependent density functional theory (TDDFT) electronic quantum calculations. The photophysical study showed the formation of a less emissive compound (or compounds). New signals in the 1H NMR spectra were attributed to photoproducts obtained via Norrish type I α-cleavage decarbonylation and Norrish type II (followed by CH3 migration) pathways. TDDFT calculations predicted that the formation of a keto-enol system (via a CH3 migration step in the type II pathway) was highly favorable and consistent with the observed spectral data.

Specific nutrition evaluation of patients with advanced chronic liver disease: Development and validation.

BACKGROUND: Malnutrition is frequently identified in patients with advanced chronic liver disease (ACLD), and its early identification is necessary for effective nutrition treatment. The aim of this study was to develop and validate a tool for specific nutrition evaluation of patients with ACLD (SNE-ACLD). METHODS: SNE-ACLD was developed by consensus among experts using Delphi technique. The initial proposal for the SNE-ACLD had six domains (history of weight loss, changes in food intake, gastrointestinal symptoms, changes in functional capacity, presence of complications of liver disease, and a nutrition-focused physical examination) and 11 items. Fifteen experts participated in content validation. In a cross-sectional study design, the new tool was applied to 129 inpatients and outpatients from a gastrohepatology unit. Nutrition status was evaluated with SNE-ACLD and subjective global assessment by one researcher. Content validation and semantic analysis were obtained by content validity index. To verify accuracy of SNE-ACLD, the sensitivity, specificity, Youden index, and area under the receiver operating characteristic curve (AUC) were calculated. RESULTS: After five evaluative sequences conducted by experts, experts excluded the domain for history of weight loss and its respective item. The final version of SNE-ACLD consists of five domains and 10 items. The new instrument showed good accuracy in identifying any level of malnutrition (AUC = 0.83; 95% CI, 0.76-0.91) and severe malnutrition (AUC = 0.90; 95% CI, 0.79-1.00). CONCLUSION: SNE-ACLD can be used in nutrition assessment of patients with liver disease. Future works should investigate its agreement with other methods and its predictive value.

Degree of food processing and association with overweight and abdominal obesity in adolescents.

OBJECTIVE: To evaluate the association between the degree of food processing, overweight, and abdominal obesity in adolescents. METHODS: This is a cross-sectional study, with 576 adolescents aged 10 to 17 years, of both sexes. Food consumption was collected using the Food Frequency Questionnaire and foods classified as in natura or minimally processed, processed foods associated with culinary ingredients, and ultraprocessed foods. Sociodemographic data, body mass index, waist circumference and waist-to-height ratio were collected. The analysis was evaluated by the Mann-Whitney test and prevalence ratio with 95% confidence interval, considering p<0.05. RESULTS: An intake above the third quartile of processed foods associated with culinary ingredients (prevalence ratio of 1.64; 95%CI: 1.12-2.42) and ultraprocessed (prevalence ratio of 1.58; 95%CI: 1.07-2.34) was associated with a higher prevalence of overweight. Consumption above the third quartile of ultraprocessed foods was associated with a higher prevalence of abdominal obesity, assessed by waist circumference (prevalence ratio of 2.48; 95%CI: 1.41-4.36), and waist-height ratio (prevalence ratio of 2.09; 95%CI: 1.11-3.92). CONCLUSION: A higher consumption of processed foods associated with culinary ingredients was related to being overweight, and ultraprocessed foods with overweight and abdominal obesity.

Aggregation-Induced Emission with Alkynylcoumarin Dinuclear Gold(I) Complexes: Photophysical, Dynamic Light Scattering, and Time-Dependent Density Functional Theory Studies.

Aggregation-induced emission (AIE) has gained a remarkable amount of interest in the past 20 years, but the majority of the studies are based on organic structures. Herein, three dinuclear gold(I) complexes, with the general formula [PPh2XPPh2-Au2-Coum2], where the Au(I) atom is linked to three different diphosphanes [PPh2XPPh2; DPPM for X = CH2 (1.1), DPPP for X = (CH2)3 (1.2), and DPPA for X = C≡C (1.3)] and the propynyloxycoumarin precursor (1, 4-methyl-substituted coumarin), have been synthesized. The compounds present AIE characteristics, AIEgens, with high luminescence quantum yields in the solid state when they are compared to dilute solutions. Photophysical studies (steady-state and time-resolved fluorescence) were obtained, with AIE being observed with the three gold(I) complexes in acetonitrile/water mixtures. This was further corroborated with dynamic light scattering measurements. Time-dependent density functional theory (TDDFT) electronic calculations show that the compounds have different syn and anti conformations (relative to the coumarin core) with 1.1 syn and 1.2 and 1.3 both anti. From time-resolved fluorescence experiments, the augment in the contribution of the longer decay component is found to be associated with the emission of the aggregate (AIE effect) and its nature (involving a dimer) rationalized from TDDFT electronic calculations.