Characterization, antimicrobial and cytotoxic activity of polymer blends based on chitosan and fish collagen.

This study aims to produce, characterize, and assess the antimicrobial activity and cytotoxicity of polymer blends based on chitosan (CT) and fish collagen (COL) produced by different precipitation methods. Polymer blends were obtained in alkaline (NaOH), saline (NaCl), and alkaline/saline (NaOH/NaCl) solutions with different CT:COL concentration ratios (20:80, 50:50, and 80:20). The polymer blends were characterized by various physicochemical methods and subsequently evaluated in terms of their in vitro antimicrobial and cytotoxicity activity.

Effect of treatment with carvacrol and aerobic training on cardiovascular function in spontaneously hypertensive rats.

New Findings: What is the central question of this study? Can two non-drug therapies, carvacrol and aerobic physical training, together have additive effects on the reduction of cardiovascular risks and control of arterial hypertension? What is the main finding and its importance? The oral use of carvacrol (20 mg/kg/day) can control sustained hypertension in spontaneously hypertensive rats, and when this use is associated with aerobic physical training, there is a more pronounced effect on the reduction of blood pressure values, making these therapies an adjunct option in the drug treatment of hypertension.

Abstract: Systemic arterial hypertension is considered the foremost cardiovascular risk factor, and it is important to examine different therapies that help prevent and treat it, especially when associated with other cardiovascular risk factors. In this context, it is known that both carvacrol and aerobic physical training benefit the cardiovascular system.

Effect of obesity on sleep quality, anthropometric and autonomic parameters in adolescent.

Objective: To compare the effects of obesity on sleep quality, the anthropometric and autonomic parameters of adolescents.

Material And Methods: A cross-sectional study was carried out with adolescents aged 11 to 18, analyzing parameters such as BMI, sleep quality records, waist circumference, fat percentage, blood pressure and sexual maturation, in addition to autonomic cardiac function through the analysis of heart rate variability.

Results: The anthropometric parameters of waist circumference, percentage fat mass, were significantly higher in the group of obese adolescents.

Acute Effects of Resistance Exercise With Blood Flow Restriction in Elderly Women: A Pilot Study.

Aim: To compare the acute effects of two resistance exercise sessions with different partial blood flow restrictions (BFR) on hemodynamic parameters and cardiac autonomic modulation in older women with metabolic syndrome.

Methods: Thirty-nine older women (64.4 ± 4.