A note about a new method for solving Riccati differential equations

Al Bastami, Belić, and Petrović (2010) proposed a new method to find solutions to some Riccati differential equations. Initially, they obtain a second-order linear ordinary differential equation (ODE) through a standard variable change in the Riccati equation. They then propose a new variable change and discuss the resolution of the resulting ODE in two cases. In the first one, the resulting ODE has constant coefficients. In the second case, they claim that it is possible to arbitrarily choose one of the resulting ODE coefficients and solve particular Riccati ODEs. We show in this work that all Riccati equations that belong to the first case can also be solved by Chini’s method. Furthermore, we show that any Riccati equation fits the second case and that the choice of the resulting ODE coefficients is not free

Influence of high temperature on the reproductive biology of dry edible bean (Phaseolus vulgaris L.)

The aim of this study was to investigate the effect of heat stress on 12 bean genotypes through the analysis of their reproductive biology in terms of flowering, pollen viability, meiotic behavior, and production. Plants were grown in a climate chamber at 25-20 °C (day and night) and at a high temperature treatment 37-26 °C (day and night) from the vegetative (V4) development stage to physiological maturity. The experimental design was 2 × 12 factorial arrangement with six replications and the factors consisted of heat treatments and genotypes. In three replications, the number of newly opened flowers was checked daily. At physiological maturity, the following traits were evaluated: percentage of pod set, number of pods, number of viable seeds, number of aborted seeds, 100 seed weight, and seed yield (g per plant). The other three replications were used to collect flowers to create slides to study viability of the pollen grain and analyze the meiotic behavior. The heat treatment factor significantly affected the following traits: total number of pollen grains, number of flowers, number of pods, pod set, number of viable seeds, 100 seed weight, and seed yield. The raised temperature reduced these variables, except for percentage of pod set, and increased meiotic irregularities. The mean values regarding seed yield were 16.39 g per plant for the control treatment and 7.46 g per plant under high temperature. IAC Imperador, FT Nobre, Pérola, BRS Estilo, and IAC Diplomata stood out for higher bean seed yield under increased temperature

EVAPOTRANSPIRAÇÃO AUTOMATIZADA: uma revisão sistemática e meta-análise

Given the scarcity of water resources that has been worsening over time and the high consumption of these resources by agribusiness, there is a need for studies that can manage such action in a sustainable way, providing food security for the present and future world population. Background: with the topic: What is the systemic view of automated models and techniques for determining or estimating transpiration, evaporation or evapotranspiration for plantations? Objectives: to identify in recent literature what researchers and scientists have disclosed about automation methods for supervision, with a focus on estimating evapotranspiration. identify methods, models and techniques for inferring evapotranspiration. Methods: A methodology based on exploratory theoretical testing with qualitative and quantitative characteristics through Systematic Review and Meta-Analysis of data. Results: Using specific software and methods, simulation studies with experimental data make it possible to calibrate efficient models to estimate evapotranspiration, but low-cost methods still have little adherence.Dada la escasez de recursos hídricos que se ha ido agravando con el tiempo y el alto consumo de estos recursos por parte de la agroindustria, se necesitan estudios que puedan gestionar dicha acción de manera sostenible, brindando seguridad alimentaria a la población mundial presente y futura. Antecedentes: con el tema: ¿Cuál es la visión sistémica de los modelos y técnicas automatizadas para determinar o estimar la transpiración, evaporación o evapotranspiración para plantaciones? Objetivos: Identificar en la literatura reciente lo que investigadores y científicos han publicado sobre métodos de automatización para riego, con enfoque en la estimación de la evapotranspiración. Identificar métodos, modelos y técnicas para inferir la evapotranspiración. Métodos: La metodología se basó en un ensayo teórico exploratorio con características cualitativas y cuantitativas mediante Revisión Sistemática y Metaanálisis de datos. Resultados: Utilizando software y métodos específicos, los estudios de simulación con datos experimentales permiten calibrar modelos eficientes para estimar la evapotranspiración, pero los métodos de bajo costo aún tienen poca adherencia.Tendo em vista a escassez de recursos hídricos que vem se agravando ao longo do tempo e o alto consumo desses recursos pelo agronegócio, há a necessidade de estudos que possam gerir tal ação de forma sustentável, proporcionando segurança alimentar para a população mundial presente e futura. Background: com o tema: Qual a visão sistêmica dos modelos e técnicas automatizadas para determinação ou estimativa de transpiração, evaporação ou evapotranspiração para plantações? Objetivos: Identificar na literatura recente o que pesquisadores e cientistas têm divulgado sobre métodos de automação para irrigação, com foco na estimativa da evapotranspiração. Identificar métodos, modelos e técnicas de inferência da evapotranspiração. Métodos: A metodologia baseou-se no ensaio teórico exploratório com características qualitativas e quantitativas por meio de Revisão Sistemática e Metanálise dos dados. Resultados: Com o uso de softwares e métodos específicos, estudos de simulação com dados experimentais permitem calibrar modelos eficientes para estimar a evapotranspiração, mas métodos de baixo custo ainda têm pouca aderência

As manifestações clínicas do portador de paralisia facial

Introdução: A paralisia facial e um sintoma de um transtorno de base resultante em imobilidade e incapacidade de executar a mímica facial e a expressão emotiva. São várias as etiologias deste acometimento, sendo a classificação em paralisia facial periférica, representada classicamente pela paralisia de Bell e a central, pelo acidente vascular encefálico, adotada para auxiliar na investigação e seguimento clínico adequado. Objetivo: Descrever sobre a paralisia facial, com foco em características clínicas que propiciem ao diagnóstico precoce, medidas terapêuticas e restauração imediata. Metodologia: Revisão narrativa que selecionou artigos disponibilizados na íntegra publicados no recorte temporal de 2008 até 2022. Resultados: Dos 10 artigos incluídos neste estudo, todos realizaram uma ampla análise sobre a temática, a qual propiciou a disseminação de informações atualizadas sobre conceito, diagnóstico diferencial entre duas condições clínicas opostas resultantes em paralisia facial, manifestações, avaliação clínica e manejo adequado. Conclusão: Estudos ainda urgem em ser feitos no intuito de orientar melhor os profissionais e a comunidade a respeito da paralisia facial e a importância que possui o acompanhamento e seguimento precoce. Destarte,

Molecular hydrogen downregulates acute exhaustive exercise-induced skeletal muscle damage

Physical exercise-induced skeletal muscle damage may be characterized by increased oxidative stress, inflammation, and apoptosis which may be beneficial when exercise is regular, but it is rather harmful when exercise is exhaustive and performed acutely by unaccustomed individuals. Molecular hydrogen (H2) has emerged as a potent antioxidant, anti-inflammatory, and anti-apoptotic agent, but its action on the deleterious effects of acute exhaustive exercise in muscle damage remain unknown. Therefore, we tested the hypothesis that H2 decreases acute exhaustive exercise-induced skeletal muscle damage of sedentary rats. Rats ran to exhaustion on a sealed treadmill inhaling an H2-containing mixture or the control gas. We measured oxidative stress (SOD, GSH, and TBARS), inflammatory (TNF-α, IL-1β, IL-6, IL-10, and NF-kB phosphorylation) and apoptotic (expression of caspase-3, Bcl-2, and HSP70) markers. Exercise caused no changes in SOD activity but increased TBARS levels. H2 caused increases in exercise-induced SOD activity and blunted exercise-induced increased TBARS levels. We observed exercise-induced TNF-α and IL-6 surges as well as NF-kB phosphorylation, which were blunted by H2. Exercise increased cleaved caspase-3 expression, and H2 reduced this response. In conclusion, H2 effectively downregulates muscle damage, reducing oxidative stress, inflammation, and apoptosis after acute exhaustive exercise performed by an unaccustomed organism.The accepted manuscript in pdf format is listed with the files at the bottom of this page. The presentation of the authors' names and (or) special characters in the title of the manuscript may differ slightly between what is listed on this page and what is listed in the pdf file of the accepted manuscript; that in the pdf file of the accepted manuscript is what was submitted by the author

The economic importance of the peanuts production chain

The importance and economic representativeness of the peanut production chain has grown exponentially in recent years, tending to gain more market share. Background: The study had as its theme the question: What is the economic, technological, social and environmental relevance of the peanut production chain for Brazil? Objective: Conduct a survey of information and data that allow inferring the economic, social and environmental importance of the peanut production chain for Brazil in the global scenario. Methods: The methodology applied was exploratory research "ad hoc" in exploratory theoretical essay of qualitative approach, and analytical descriptive in the report of the findings. Results: Exports grow on a logarithmic scale, in 2020 it had revenues of US$ 427.8 million. The sector generates 42 thousand jobs, and the culture makes it possible to meet social and environmental demands. Conclusions: The adoption of technologies and the improvement of production methods are essential for the continuous progress of the sector with the creation of jobs and the adhesion of new producers, with an increasingly sustainable production, with less environmental impact and reduction of fertilizer waste, with expansion of the productive capacity per planted bushel