Impact of COVID-19 on heart rate variability in post-COVID individuals compared to a control group.

This study investigated the impact of mild COVID-19 on HRV in groups stratified by time after infection and to compare to a healthy group of the same age without previous virus infection and without need of hospitalization. This is a cross-sectional study. We divided the sample into four groups: control group (CG) (n = 31), group 1 (G1): ≤6 weeks (n = 34), group 2 (G2): 2-6 months (n = 30), group 3 (G3): 7-12 months (n = 35) after infection.

Osteoid osteoma and osteoblastoma of the cervical spine in the pediatric population: analysis of the literature and experience with four operated cases.

Background And Aim: Osteoid osteoma (Oo) and osteoblastoma (Ob) are rare primary bone tumors with a higher prevalence in the second decade of life. Treatment can be conservative, but in cases of spinal location, resective surgery is of great importance but may be challenging.

Material And Methods: We report four pediatric cases of Oo and Ob managed in our unit, with different locations at the level of the cervical spine.

Three Dihydroquinolin-4-one Derivatives as Potential Biodiesel Additives: From the Molecular Structure to Machine Learning Approach.

Biodiesel offers an alternative to fossil fuels, primarily because it is derived from renewable sources, with the potential to mitigate issues such as pollutant and greenhouse gas emissions, resource scarcity, and the market instability of petroleum derivatives. However, lower durability and stability pose challenges. To address this, researchers worldwide are exploring technologies that employ specific molecules to slow down biodiesel's oxidation process, thereby preserving its key physicochemical properties.

Factors associated with excess weight, hypertension and gestational diabetes in northern Brazil in 2021.

Objective: To estimate the prevalence and factors associated with excess weight, hypertension and diabetes among pregnant women in the northern region of Brazil.

Method: This is a cross-sectional, retrospective study with secondary data conducted with pregnant women living in the northern region of Brazil who took part in the Telephone Survey for Surveillance of Risk and Protective Factors for Chronic Diseases. The chi-square and Kruskal-Wallis tests were used for analysis, as well as the Binomial Logistic Regression model.