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1.
Phys Chem Chem Phys ; 25(6): 5130-5145, 2023 Feb 08.
Artigo em Inglês | MEDLINE | ID: mdl-36722991

RESUMO

An in-depth study of plasma activated water (PAW) generation was conducted to link changes in power supply, electrode material, input gas, and treatment time to the resulting reaction chemistry, all while maintaining a consistent electrode geometry. These changes in chemistry can help tailor PAW for different space applications. An AC, DC, and nanosecond pulsed power supply were each used to generate PAW with stainless steel, copper, tungsten, or platinum electrodes while utilizing air, nitrogen, carbon dioxide, helium, or argon as the feed gas. Tap or deionized (DI) water was treated for 1 to 15 minutes, and the generated PAW was tested for changes in pH, conductivity, and concentration of nitrates, nitrites, and ammonium. Calculations indicated that the production of reactive nitrogen species was the leading cause of the pH and conductivity changes. The DC generated air plasma, with a voltage between 2.5-3.14 kV and currents of 85-100 mA, was able to reduce the pH of DI water to 2.88 and generate 128 ppm of nitrates. The AC supply was less effective, producing a pH of 4.22 for DI water and 5 ppm of nitrates. The pulsed supply, operating at 20% of the input power of the DC supply, lowered the pH to 3.34 and generated 26 ppm of nitrates. When a simulated Martian gas mixture of 95% CO2 and 5% N2 was used as the feed gas, 24.8 ppm and 3.82 ppm of nitrates were generated with the DC and pulsed supplies, respectively.

2.
Biochemistry ; 58(39): 4028-4034, 2019 10 01.
Artigo em Inglês | MEDLINE | ID: mdl-31502443

RESUMO

The heme-based and CO-responsive RcoM transcriptional regulators from Burkholderia xenovorans are known to display an extremely high affinity for CO while being insensitive to O2. We have quantitatively characterized the heme-CO interaction in full-length RcoM-2 and compared it with the isolated heme domain RcoMH-2 to establish the origin of these characteristics. Whereas the CO binding rates are similar to those of other heme-based sensor proteins, the dissociation rates are two to three orders of magnitude lower. The latter property is tuned by the yield of CO escape from the heme pocket after disruption of the heme-CO bond, as determined by ultrafast spectroscopy. For the full-length protein this yield is ∼0.5%, and for the isolated heme domain it is even lower, associated with correspondingly faster CO rebinding kinetics, leading to Kd values of 4 and 0.25 nM, respectively. These differences imply that the presence of the DNA-binding domain influences the ligand-binding properties of the heme domain, thus abolishing the observed quasi-irreversibility of CO binding to the isolated heme domain. RcoM-2 binds target DNA with high affinity (Kd < 2 nM) when CO is bound to the heme, and the presence of DNA also influences the heme-CO rebinding kinetics. The functional implications of our findings are discussed.


Assuntos
Proteínas de Bactérias/química , Monóxido de Carbono/metabolismo , Escherichia coli/metabolismo , Heme/química , Hemeproteínas/metabolismo , DNA/metabolismo , Polarização de Fluorescência , Cinética , Ligantes , Ligação Proteica , Domínios e Motivos de Interação entre Proteínas
3.
J Surg Oncol ; 120(8): 1371-1378, 2019 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-31696512

RESUMO

BACKGROUND: Postoperative complications after gastric cancer resection vary in different series and they might have a significant impact in long-term outcomes. Our aim was to build a prediction rule on gastric cancer patients' overall and major morbidity risks. METHODS: This retrospective study included 1223 patients from a single center who were resected between 1992 and 2016. Overall and major morbidity predictors were identified through multiple logistic regression. Models' performances were assessed through discrimination, calibration, and cross-validation, and nomograms were constructed. RESULTS: The mean age was 61.3-year old and the male gender was more frequent (60%). The most common comorbidities were hypertension (HTN), diabetes, and chronic obstructive pulmonary disease (COPD). A D2-distal gastrectomy was the most frequent procedure and 87% of all lesions were located in the middle or distal third. Age, COPD, coronary heart disease, chronic liver disease, pancreatic resection, and operative time were independent predictors of overall and major morbidity. The extent of resection and splenectomy was associated with overall events and HTN with major ones. Both models were very effective in predicting events among patients at higher risk. CONCLUSIONS: The overall and major morbidity models and nomograms included clinical- and surgical-related data that were very effective in predicting events, especially for high-risk patients.


Assuntos
Gastrectomia/efeitos adversos , Complicações Pós-Operatórias/epidemiologia , Neoplasias Gástricas/cirurgia , Fatores Etários , Brasil/epidemiologia , Estudos de Coortes , Doença das Coronárias/epidemiologia , Feminino , Humanos , Hipertensão/epidemiologia , Hepatopatias/epidemiologia , Excisão de Linfonodo , Masculino , Pessoa de Meia-Idade , Duração da Cirurgia , Pâncreas/cirurgia , Doença Pulmonar Obstrutiva Crônica/epidemiologia , Estudos Retrospectivos , Fatores de Risco , Esplenectomia , Neoplasias Gástricas/epidemiologia
4.
Hum Brain Mapp ; 37(5): 1893-902, 2016 May.
Artigo em Inglês | MEDLINE | ID: mdl-26917433

RESUMO

Math-gifted subjects are characterized by above-age performance in intelligence tests, exceptional creativity, and high task commitment. Neuroimaging studies reveal enhanced functional brain organization and white matter microstructure in the frontoparietal executive network of math-gifted individuals. However, the cortical morphometry of these subjects remains largely unknown. The main goal of this study was to compare the cortical morphometry of math-gifted adolescents with that of an age- and IQ-matched control group. We used surface-based methods to perform a vertex-wise analysis of cortical thickness and surface area. Our results show that math-gifted adolescents present a thinner cortex and a larger surface area in key regions of the frontoparietal and default mode networks, which are involved in executive processing and creative thinking, respectively. The combination of reduced cortical thickness and larger surface area suggests above-age neural maturation of these networks in math-gifted individuals. Hum Brain Mapp 37:1893-1902, 2016. © 2016 Wiley Periodicals, Inc.


Assuntos
Criança Superdotada , Lobo Frontal/diagnóstico por imagem , Matemática , Modelos Neurológicos , Lobo Parietal/diagnóstico por imagem , Adolescente , Mapeamento Encefálico , Criança , Feminino , Humanos , Processamento de Imagem Assistida por Computador , Testes de Inteligência , Imageamento por Ressonância Magnética , Masculino , Estatísticas não Paramétricas
5.
Tumour Biol ; 37(5): 6691-9, 2016 May.
Artigo em Inglês | MEDLINE | ID: mdl-26649862

RESUMO

Basaloid squamous cell carcinoma (BSCC), a variant of squamous cell carcinoma (SCC), is a rare and aggressive epithelial malignancy which has been reported in only 0.1-11 % of primary esophageal carcinomas. In this study, a comparison of clinicopathological features and protein expression between esophageal BSCC (EBSCC) and conventional esophageal SCC (ESCC) cases from Brazil was performed in order to find factors that can be relevant to better characterize EBSCC. The expression of HER2, epidermal growth factor receptor (EGFR), Ki-67, and cyclins (A, B1, and D1) in 111 cases (95 ESCC and 16 EBSCC) was evaluated by immunohistochemistry using tissue microarray. When the clinicopathological data were compared, no significant difference was found between the two histological types. Although the difference is not significant (p = 0.055), the EGFR expression was more frequent in the conventional ESCC than in the EBSCC group. Our results indicate that the clinicopathological profiles of conventional ESCC and EBSCC are similar and provide no indicators for differences in prognosis between these two groups.


Assuntos
Biomarcadores Tumorais , Carcinoma Basocelular/metabolismo , Carcinoma Basocelular/mortalidade , Carcinoma de Células Escamosas/metabolismo , Carcinoma de Células Escamosas/mortalidade , Neoplasias Esofágicas/metabolismo , Neoplasias Esofágicas/mortalidade , Idoso , Biópsia , Carcinoma Basocelular/patologia , Carcinoma Basocelular/terapia , Carcinoma de Células Escamosas/patologia , Carcinoma de Células Escamosas/terapia , Terapia Combinada , Neoplasias Esofágicas/patologia , Neoplasias Esofágicas/terapia , Feminino , Humanos , Imuno-Histoquímica , Masculino , Pessoa de Meia-Idade , Metástase Neoplásica , Estadiamento de Neoplasias , Prognóstico , Fatores de Risco , Análise de Sobrevida , Resultado do Tratamento
6.
Fetal Diagn Ther ; 39(3): 198-208, 2016.
Artigo em Inglês | MEDLINE | ID: mdl-26113035

RESUMO

OBJECTIVES: The aim of our study was to construct a model of customized birth weight curves based on a Spanish population and to compare the ability of this customized model to our population-based chart to predict a neonatal ponderal index (PI) <10th percentile. METHODS: We developed a model that can predict the 10th percentile for a fetus according to gestational age and gender as well as maternal weight, height, and age. We compared the ability of this customized model to that of our own population-based model to predict a neonatal PI <10th percentile. Data from a large database were used (32,854 live newborns, from 1993 through 2012). Only singleton pregnancies with a gestational age at delivery of 32-42 weeks were included. RESULTS: In the entire pregnant population, the customized method was superior to the population-based method for detecting newborns with a PI <10th percentile (sensitivity: 55 vs. 40.96%; specificity: 99.6 vs. 91.23%; positive predictive value: 11.49 vs. 9.55%, and negative predictive value: 98.84 vs. 98.55%, respectively). In pregnant women with a BMI >90th percentile, the sensitivity was 75%, compared to 50% in the population-based method. In pregnant women with a height >90th percentile, the sensitivity was almost as high as in the population-based method (61.53 vs. 33.33%). CONCLUSION: The customized birth weight curve is superior to the population-based method for the detection of newborns with a PI <10th percentile. This is especially the case in women in the higher scales of height and weight as well as in preterm babies.


Assuntos
Peso ao Nascer , Desenvolvimento Fetal , Transtornos da Nutrição Fetal/diagnóstico , Modelos Teóricos , Adulto , Estatura , Peso Corporal , Feminino , Idade Gestacional , Humanos , Recém-Nascido , Recém-Nascido Pequeno para a Idade Gestacional , Masculino , Medicina de Precisão/métodos , Valor Preditivo dos Testes , Valores de Referência , Sensibilidade e Especificidade , Fatores Sexuais , Espanha/epidemiologia
7.
Hum Brain Mapp ; 35(6): 2619-31, 2014 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-24038774

RESUMO

Recent functional neuroimaging studies have shown differences in brain activation between mathematically gifted adolescents and controls. The aim of this study was to investigate the relationship between mathematical giftedness, intelligent quotient (IQ), and the microstructure of white matter tracts in a sample composed of math-gifted adolescents and aged-matched controls. Math-gifted subjects were selected through a national program based on detecting enhanced visuospatial abilities and creative thinking. We used diffusion tensor imaging to assess white matter microstructure in neuroanatomical connectivity. The processing included voxel-wise and region of interest-based analyses of the fractional anisotropy (FA), a parameter which is purportedly related to white matter microstructure. In a whole-sample analysis, IQ showed a significant positive correlation with FA, mainly in the corpus callosum, supporting the idea that efficient information transfer between hemispheres is crucial for higher intellectual capabilities. In addition, math-gifted adolescents showed increased FA (adjusted for IQ) in white matter tracts connecting frontal lobes with basal ganglia and parietal regions. The enhanced anatomical connectivity observed in the forceps minor and splenium may underlie the greater fluid reasoning, visuospatial working memory, and creative capabilities of these children.


Assuntos
Encéfalo/anatomia & histologia , Criança Superdotada , Inteligência , Matemática , Substância Branca/anatomia & histologia , Adolescente , Anisotropia , Criança , Imagem de Tensor de Difusão , Feminino , Humanos , Processamento de Imagem Assistida por Computador , Testes de Inteligência , Masculino , Fibras Nervosas Mielinizadas , Vias Neurais/anatomia & histologia
8.
Lancet Reg Health Am ; 30: 100670, 2024 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-38405031

RESUMO

Background: The goal of this study was to re-estimate rates of bilateral hearing loss Nationally, and create new estimates of hearing loss prevalence at the U.S. State and County levels. Methods: We developed small area estimation models of mild, and moderate or worse bilateral hearing loss in the U.S. using data from the National Health and Nutrition Examination Survey (2001-2012, 2015-2018), the American Community Survey (2019), Census County Business Patterns (2019); Social Security Administration Data (2019); Medicare Fee-for-Service and Advantage claims data (2019); the Area Health Resources File (2019), and other sources. We defined hearing loss as mild (>25 dB through 40 dB), moderate or worse (>40 dB), or any (>25 dB) in the better hearing ear based on a 4-frequency pure-tone-average threshold, and created estimates by age group (0-4, 5-17, 18-34, 35-64, 65-74, 75+), gender, race and ethnicity, state, and county. Findings: We estimated that 37.9 million (95% Uncertainty Interval [U.I.] 36.6-39.1) Americans experienced any bilateral hearing loss; 24.9 million (95% U.I. 23.6-26.0) with mild and 13.0 million (95% U.I. 12.1-13.9) with moderate or worse. The prevalence rate of any hearing loss was 11.6% (95% U.I. 11.2%-12.0%). Hearing loss increased with age. Men were more likely to have hearing loss than women after age 35, and non-Hispanic Whites had higher rates of hearing loss than other races and ethnicities. Higher hearing loss prevalence was associated with smaller population size. West Virginia, Alaska, Wyoming, Oklahoma, and Arkansas had the highest standardised rate of bilateral hearing loss, and Washington D.C., New Jersey, New York, Maryland, and Connecticut had the lowest. Interpretation: Bilateral Hearing loss varies by State and County, with variation associated with population age, race and ethnicity, and population size. Geographic estimates can be used to raise local awareness of hearing loss as a problem, to prioritize areas for hearing loss prevention, identification, and treatment, and to guide future research on the hearing loss risk factors that contribute to these differences. Funding: CDC's National Center for Chronic Disease Prevention and Health Promotion, Division of Population Health.

9.
J Bras Nefrol ; 46(2): e20230014, 2024.
Artigo em Inglês, Português | MEDLINE | ID: mdl-38284551

RESUMO

INTRODUCTION: Anemia is frequent in patients undergoing replacement therapy for kidney failure. Anemia in the pre- and post-transplantation period might be related to kidney transplant outcomes. The current study therefore sought to assess the relationship between anemia, delayed allograft function (DGF), chronic kidney allograft dysfunction (CAD), and death from any cause following kidney transplantation from a deceased donor. METHODS: This was a retrospective study with 206 kidney transplant patients of deceased donors. We analyzed deceased donors' and kidney transplant patients' demographic data. Moreover, we compared biochemical parameters, anemia status, and medicines between DGF and non-DGF groups. Afterward, we performed a multivariate analysis. We also evaluated outcomes, such as CAD within one year and death in ten years. RESULTS: We observed a lower frequency of pre-transplant hemoglobin concentration (Hb) but higher frequency of donor-serum creatinine and red blood transfusion within one week after transplantation in the group with DGF. In addition, there was an independent association between Hb concentration before transplantation and DGF [OR 0.252, 95%CI: 0.159-0.401; p < 0.001]. There was also an association between Hb concentration after six months of kidney transplantation and both CAD [OR 0.798, 95% CI: 0.687-0.926; p = 0.003] and death from any cause. CONCLUSION: An association was found between pre-transplantation anemia and DGF and between anemia six months after transplantation and both CAD and death by any cause. Thus, anemia before or after transplantation affects the outcomes for patients who have undergone kidney transplantation from a deceased donor.


Assuntos
Anemia , Transplante de Rim , Insuficiência Renal , Humanos , Transplante de Rim/efeitos adversos , Estudos Retrospectivos , Função Retardada do Enxerto/epidemiologia , Função Retardada do Enxerto/etiologia , Sobrevivência de Enxerto , Doadores de Tecidos , Anemia/etiologia , Insuficiência Renal/complicações , Hemoglobinas , Fatores de Risco
10.
Int J Neuropsychopharmacol ; 16(2): 485-96, 2013 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-22575611

RESUMO

Despite the high morbidity and mortality associated with bipolar depression, the optimal treatment for this phase is still a matter of debate. The aim of the current review was to provide updated evidence about the efficacy and tolerability of anticonvulsants in the treatment of acute bipolar depression. A comprehensive review of randomized controlled trials (RCTs) evaluating the use of anticonvulsants for the treatment of acute bipolar depression up to June 2011 was conducted by means of the PubMed-Medline database. Eligibility criteria included active comparator-controlled or placebo-controlled randomized studies involving monotherapy or combination therapy. A total of 18 RCTs fulfilled the inclusion criteria. Studies supported the efficacy of divalproex as monotherapy in acute bipolar depression but small sample size was a common methodological limitation. Findings were inconclusive for lamotrigine and carbamazepine although overall lamotrigine may have a beneficial but modest effect. Negative results were found for levetiracetam and gabapentin but the evidence base on these agents is scant. All anticonvulsants were generally well tolerated. No double-blind RCTs were found for the use of other anticonvulsants such as oxcarbazepine, licarbazepine, zonisamide, retigabine, pregabalin, tiagabine, felbamate and vigabatrine in the acute treatment of bipolar depression. To sum up, taking into consideration the efficacy and tolerability profiles of anticonvulsants, current evidence supports the use of divalproex and lamotrigine in the treatment of acute bipolar depression. However, available data for most other anticonvulsants are inconclusive and further RCTs with larger sample sizes are needed before drawing firm conclusions.


Assuntos
Anticonvulsivantes/uso terapêutico , Transtorno Bipolar/tratamento farmacológico , Doença Aguda , Bases de Dados Factuais/estatística & dados numéricos , Humanos , Ensaios Clínicos Controlados Aleatórios como Assunto
11.
BMC Health Serv Res ; 13: 218, 2013 Jun 15.
Artigo em Inglês | MEDLINE | ID: mdl-23768163

RESUMO

BACKGROUND: The harmonization of European health systems brings with it a need for tools to allow the standardized collection of information about medical care. A common coding system and standards for the description of services are needed to allow local data to be incorporated into evidence-informed policy, and to permit equity and mobility to be assessed. The aim of this project has been to design such a classification and a related tool for the coding of services for Long Term Care (DESDE-LTC), based on the European Service Mapping Schedule (ESMS). METHODS: The development of DESDE-LTC followed an iterative process using nominal groups in 6 European countries. 54 researchers and stakeholders in health and social services contributed to this process. In order to classify services, we use the minimal organization unit or "Basic Stable Input of Care" (BSIC), coded by its principal function or "Main Type of Care" (MTC). The evaluation of the tool included an analysis of feasibility, consistency, ontology, inter-rater reliability, Boolean Factor Analysis, and a preliminary impact analysis (screening, scoping and appraisal). RESULTS: DESDE-LTC includes an alpha-numerical coding system, a glossary and an assessment instrument for mapping and counting LTC. It shows high feasibility, consistency, inter-rater reliability and face, content and construct validity. DESDE-LTC is ontologically consistent. It is regarded by experts as useful and relevant for evidence-informed decision making. CONCLUSION: DESDE-LTC contributes to establishing a common terminology, taxonomy and coding of LTC services in a European context, and a standard procedure for data collection and international comparison.


Assuntos
Codificação Clínica/normas , Assistência de Longa Duração/organização & administração , Bases de Dados Factuais , Prestação Integrada de Cuidados de Saúde , Europa (Continente) , Humanos , Assistência de Longa Duração/classificação , Assistência de Longa Duração/normas
12.
Rev Esp Geriatr Gerontol ; 58(2): 104-107, 2023.
Artigo em Espanhol | MEDLINE | ID: mdl-36849328

RESUMO

INTRODUCTION: Numerous organizations and institutions warn of the need for physical activity due to the multiple benefits it brings to the health of the population. In people over 65 years of age, doing some type of activity has a direct impact on healthy ageing. OBJECTIVE: To find out the state of health and physical activity of people over 65 years of age in Spain and to identify population typologies in order to establish specific health promotion strategies. METHOD: Descriptive cross-sectional study using a sample formed by 7167 older adults with data collected during the years 2019 and 2020 from the European Health Survey in Spain. Sociodemographic variables related to physical activity and health status were selected. A latent class analysis was carried out to analyze characteristics in subgroups of the population over 65 years of age. RESULTS: Five population subgroups were found where only one, representing 21.35% of the older adult, had a good perception of their health and regularly engaged in physical activity. CONCLUSION: Most of the Spanish population over 65 years, despite not suffering from limiting health problems, has high levels of sedentary lifestyles and obesity. It is necessary to promote healthy ageing policies taking into account the characteristics of the subgroups of the population over 65 years of age.


Assuntos
Exercício Físico , Promoção da Saúde , Humanos , Idoso , Espanha , Estudos Transversais , Inquéritos Epidemiológicos
13.
Sci Adv ; 9(36): eadi2232, 2023 09 08.
Artigo em Inglês | MEDLINE | ID: mdl-37682999

RESUMO

Vitamin B6 is a vital micronutrient across cell types and tissues, and dysregulated B6 levels contribute to human disease. Despite its importance, how B6 vitamer levels are regulated is not well understood. Here, we provide evidence that B6 dynamics are rapidly tuned by precise compartmentation of pyridoxal kinase (PDXK), the rate-limiting B6 enzyme. We show that canonical Wnt rapidly led to the accumulation of inactive B6 by shunting cytosolic PDXK into lysosomes. PDXK was modified with methyl-arginine Degron (MrDegron), a protein tag for lysosomes, which enabled delivery via microautophagy. Hyperactive lysosomes resulted in the continuous degradation of PDXK and B6 deficiency that promoted proliferation in Wnt-driven colorectal cancer (CRC) cells. Pharmacological or genetic disruption of the coordinated MrDegron proteolytic pathway was sufficient to reduce CRC survival in cells and organoid models. In sum, this work contributes to the repertoire of micronutrient-regulated processes that enable cancer cell growth and provides insight into the functional impact of B6 deficiencies for survival.


Assuntos
Peptídeo Hidrolases , Vitamina B 6 , Humanos , Proteólise , Micronutrientes , Vitaminas
14.
Front Endocrinol (Lausanne) ; 13: 887037, 2022.
Artigo em Inglês | MEDLINE | ID: mdl-35600583

RESUMO

A fundamental question in cell biology underlies how nutrients are regenerated to maintain and renew tissues. Physiologically, the canonical Wnt signaling is a vital pathway for cell growth, tissue remodeling, and organ formation; pathologically, Wnt signaling contributes to the development of myriad human diseases such as cancer. Despite being the focus of intense research, how Wnt intersects with the metabolic networks to promote tissue growth and remodeling has remained mysterious. Our understanding of metabolism has been revolutionized by technological advances in the fields of chemical biology, metabolomics, and live microscopy that have now made it possible to visualize and manipulate metabolism in living cells and tissues. The application of these toolsets to innovative model systems have propelled the Wnt field into new realms at the forefront answering the most pressing paradigms of cell metabolism in health and disease states. Elucidating the basis of Wnt signaling and metabolism in a cell-type and tissue-specific manner will provide a powerful base of knowledge for both basic biomedical fields and clinician scientists, and has the promise to generate new, transformative therapies in disease and even processes of aging.


Assuntos
Via de Sinalização Wnt , Humanos , Via de Sinalização Wnt/fisiologia
15.
Metabolites ; 12(10)2022 Oct 11.
Artigo em Inglês | MEDLINE | ID: mdl-36295863

RESUMO

Vitamin B micronutrients are essential regulators of one carbon metabolism that ensures human health. Vitamin B9, or folate, lies at the heart of the folate cycle and converges with the methionine cycle to complete the one carbon pathway. Additionally, vitamin B6 contributes by orchestrating the flux of one carbon cycling. Dysregulation of vitamin B contributes to altered biochemical signaling that manifests in a spectrum of human diseases. This review presents an analysis of the past, present, and future work, highlighting the interplay between folate and vitamin B6 in one carbon metabolism. Emerging insights include advances in metabolomic-based mass spectrometry and the use of live-cell metabolic labeling. Cancer is used as a focal point to dissect vitamin crosstalk and highlight new insights into the roles of folate and vitamin B6 in metabolic control. This collection of vitamin-based research detailing the trends of one carbon metabolism in human disease exemplifies how the future of personalized medicine could unfold using this new base of knowledge and ultimately provide next-generation therapeutics.

16.
J Phys Chem Lett ; 13(1): 393-399, 2022 Jan 13.
Artigo em Inglês | MEDLINE | ID: mdl-34985898

RESUMO

Using femtosecond transient absorption (fs-TA), we investigate the hot exciton relaxation dynamics in strongly confined lead iodide perovskite nanoplatelets (NPLs). The large quantum and dielectric confinement leads to discrete excitonic transitions and strong Stark features in the TA spectra. This prevents the use of conventional relaxation analysis methods extracting the carrier temperature or measuring the buildup of the band-edge bleaching. Instead, we show that the TA spectral line shape near the band-edge reflects the state of the system, which can be used to probe the exciton cooling dynamics. The ultrafast hot exciton relaxation in one- to three- monolayer-thick NPLs confirms the absence of intrinsic phonon bottleneck. However, excitation fluence-dependent measurements reveal a hot phonon bottleneck effect, which is found to be independent of the nature of the internal cations but strongly affected by the ligands and/or sample surface state. Together, these results suggest a role of the surface ligands in the cooling process.

17.
Artigo em Inglês | MEDLINE | ID: mdl-35897484

RESUMO

The aim of this study was to assess whether the infection by SARS-CoV-2 has significantly influenced physical activity, diet, alcohol, and drug consumption habits, as well as the quality of life of students of the bachelor's degree in Physical Activity and Sports Sciences. For this purpose, an online survey was conducted, which included socio-demographic questions related to the COVID-19 disease. Physical activity was analyzed using the International Physical Activity Questionnaire (IPAQ), adherence to the Mediterranean diet using the PREDIMED questionnaire, alcohol consumption using the AUDIT questionnaire, and drug consumption using the DAST-10 questionnaire. Health-related quality of life was analyzed with the SF-12 questionnaire. Our results reveal that those who engaged in either vigorous physical activity or, on the contrary, very low-intensity physical activity, were affected by the SARS-CoV-2 disease, which reduced the average weekly time they spent on their type of activity. However, those who previously performed moderate activities have managed to stay on the same fitness level despite having suffered from SARS-CoV-2 disease (p = 0.433). In conclusion, general health is affected by suffering from the COVID-19 disease, inadequate eating habits, substance use, and the performance of vigorous or very low-intensity of physical activity.


Assuntos
COVID-19 , Dieta Mediterrânea , COVID-19/epidemiologia , Exercício Físico , Comportamento Alimentar , Humanos , Estilo de Vida , Qualidade de Vida , SARS-CoV-2 , Estudantes , Inquéritos e Questionários
18.
Cancers (Basel) ; 14(16)2022 Aug 19.
Artigo em Inglês | MEDLINE | ID: mdl-36010999

RESUMO

FLT3-internal tandem duplication (ITD) analysis is not typically performed in cDNA samples and is not considered an appropriate marker for monitoring measurable residual disease (MRD). The aims of this study were to compare FLT3-ITD mutation analysis in DNA and cDNA samples at diagnosis and to demonstrate the usefulness of its expression measurement as an MRD marker after allogeneic stem cell transplantation (allo-HSCT) or FLT3 inhibitor (FLT3i) administration. A total of 46 DNA and cDNA diagnosis samples, 102 DNA and cDNA post-allo-HSCT samples from 34 patients and 37 cDNA samples from 7 patients with refractory/relapse AML treated with FLT3i were assessed for the FLT3-ITD mutation through fragment analysis. In terms of sensitivity, the analysis of cDNA was superior to that of DNA, quantifying higher allelic ratio values in most cases at diagnosis, and thus optimizing the detection of minor clones and prognostic classification. Regarding the last sample before post-HSCT relapse, cDNA analysis anticipated relapse in most cases, unlike DNA analyses. With regard to the post-FLT3i follow-up, FLT3-ITD expression was reduced after the first FLT3i cycle when the treatment was effective, whereas it was not reduced in refractory patients. FLT3-ITD expression could be a useful additional biomarker at diagnosis and for the assessment of MRD after allo-HSCT and FLT3i in AML.

19.
Artigo em Inglês | MEDLINE | ID: mdl-36612421

RESUMO

Physiotherapists are at high risk for musculoskeletal disorders. There is a need in academia to address workers' health issues at the time of graduation. Nearpod is an educational application founded on a web-based learning tool. In the field of Health Sciences, the use of Nearpod has been scarce. The objective of this study was to determine the level of satisfaction with using this interactive tool and to assess the influence of using Nearpod in class on students' performance while dealing with the topic of musculoskeletal disorders in third-year Degree in Physiotherapy students during the 2021-2022 academic year. The participants were students at the University of Cadiz. They were randomly divided into two groups, a control group using a PowerPoint presentation and an experimental group using the interactive Nearpod application. The experimental group took two surveys to determine their satisfaction with the method used. Students also took a multiple-choice test to assess the knowledge acquired. In the surveys, a high percentage of satisfaction was obtained (97.62% and 99.39%). There were no significant differences in the scores obtained by the two groups, although there were significant differences in response time in favor of the experimental group (p = 0.022). Although studies should be carried out with larger samples and on different subjects, it seems that Nearpod is a tool with great potential for teaching the study of musculoskeletal disorders.


Assuntos
Doenças Musculoesqueléticas , Fisioterapeutas , Humanos , Estudantes , Satisfação Pessoal , Modalidades de Fisioterapia
20.
Healthcare (Basel) ; 10(12)2022 Nov 30.
Artigo em Inglês | MEDLINE | ID: mdl-36553931

RESUMO

There is scientific evidence that Blood Flow Restriction (BFR) is beneficial in healthy people, the elderly and patients with musculoskeletal disorders. A systematic review was conducted to evaluate the effectiveness of BFR in patients with neurological disorders. The literature search was conducted up until July 2022 in the following databases: PubMed, Web of Science (WOS), Physiotherapy Evidence Database (PEDro), LILACS, Scopus, Cumulative Index of Nursing and Allied Literature Complete (CINAHL), the Cochrane Library and Scientific Electronic Library Online (SciELO). The PEDro scale was used to analyze the methodological quality of the studies, and the Cochrane Collaboration's tool was employed to evaluate the risk of bias. A total of seven articles were included. BFR seems to be beneficial in neurological disorders. Improvements have been found in sensorimotor function, frequency and step length symmetry, perceived exertion, heart rate and gait speed, walking endurance, fatigue, quality of life, muscles thickness, gluteus density and muscle edema. No improvements were found in lower limb strength or balance. However, results must be taken with caution due to the small number of articles and to the large heterogeneity. More clinical trials are needed. These studies should homogenize the protocols used in larger samples, as well as improve their methodological quality.

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