A comparison of seasonal flexibility in pectoralis muscle fiber type and enzyme activity in migratory and resident sparrow species.

The pectoralis muscle in birds is important for flight and thermogenesis. In migratory songbirds this muscle exhibits seasonal flexibility in size, but whether this flexibility reflects changes in muscle fiber type has not been well documented. We investigated how seasonal changes in photoperiod affected pectoralis muscle fiber type and metabolic enzymes, comparing among three closely-related sparrow species: two seasonal migrants and one year-round, temperate climate resident.

Cryopreserved Thyroid Tissue Autotransplant in Pediatric Age Patients: A Feasibility Study and Literature Review.

Background And Aims: This paper aims to study an alternative solution to hormonal replacement therapy in specific groups of patients who underwent thyroidectomy during childhood or adulthood. After cryopreservation, thyroid autotransplantation could be an alternative solution which would allow us to use the ability of the thyroid tissue of producing hormones according to the physiological needs of the body.

Materials And Methods: A feasibility study about the effects of the most modern cryopreservation techniques on the structural and functional integrity of the follicular cells of the thyroid tissue has been carried out.

Migration increases mitochondrial oxidative capacity without increasing reactive oxygen species emission in a songbird.

Birds remodel their flight muscle metabolism prior to migration to meet the physiological demands of migratory flight, including increases in both oxidative capacity and defence against reactive oxygen species. The degree of plasticity mediated by changes in these mitochondrial properties is poorly understood but may be explained by two non-mutually exclusive hypotheses: variation in mitochondrial quantity or in individual mitochondrial function. We tested these hypotheses using yellow-rumped warblers (Setophaga coronata), a Nearctic songbird which biannually migrates 2000-5000 km.

Does thyroglossal duct arborization play a role in the post-surgical outcome of Sistrunk procedure in children?

Purpose: The purpose of the present study is to analyze thyroglossal duct cyst (TGDC) histopathological features, with focus on "arborization", in a cohort of pediatric patients who underwent surgical removal, and evaluate a possible correlation with clinical recurrences.

Methods: A retrospective analysis of all patients who underwent surgical resection for TGDC at the division of Pediatric Surgery of the University of Pisa from 2015 to 2020 was performed; for each patient, the following data were recorded: age, sex, clinical presentation, localization, size of the lesion, diagnostic tools, histopathological features, perioperative complications, recurrence and follow-up.

Results: With respect to arborization, following histopathological analysis 25/30 patients (83.

Dehumanization in intensive care units and standard wards: A survey for a comparative cross-sectional study.

Objectives: Dehumanization refers to the practice of treating patients as objects rather than individuals with dignity and respect.

Methods: This study explores dehumanization in healthcare, specifically mechanistic dehumanization and self-dehumanization, which can result in poor care and negative outcomes. A cross-sectional observational study was conducted using a dehumanization questionnaire given to 324 nurses in various departments.