Investigation of Host-Guest Interactions in 2-Ureido-4-ferrocenylpyrimidine Derivatives.

In the present study, synthesis, conformational behavior, host-guest complex formation, and electrochemical properties of novel 6-substituted-2-ureido-4-ferrocenylpyrimidines were explored. A comprehensive NMR spectroscopic investigation was carried out to confirm the structure and conformational equilibrium of the ureidopyrimidines through studying the temperature- and concentration dependence of NMR spectra. Low-temperature NMR measurements were used to clarify structural changes inflicted by a 2,6-diaminopyridine guest.

Why do students drop out of regular sport in late adolescent? The experience of a systematic review.

Introduction: The positive impact of youth sport on physical, mental and social health has been highlighted in several research which reinforces further investigations concerning the reasons for dropout of athletes. As one of the most emergent difficulties in youth sports is to prevent athletes from dropping out, it is important to explore what factors play important part in this process. The purpose of this study was to identify barriers and challenges related to sport persistence and dropout.

Opening the black box of article retractions: exploring the causes and consequences of data management errors.

The retraction of an article is probably the most severe outcome of a scientific project. While great emphasis has been placed on articles retracted due to scientific misconduct, studies show many retractions are due to honest errors. Unfortunately, in most cases, retraction notices do not provide sufficient information to determine the specific types and causes of these errors.

Outcomes and characteristics differ between homeless and housed trauma patients following the COVID-19 pandemic.

Background: Americans experiencing homelessness are uniquely vulnerable to traumatic injuries and morbidity. Despite a high and increasing number of persons experiencing homelessness (PEH), American researchers have not comprehensively described the impact of this social problem on trauma patients in recent years.

Study Design: Retrospective cohort study using the American College of Surgeons TQIP 2021-2022 data.

Exploring Individual Components of Sport Persistence in the Light of Gender, Education, and Level and Type of Sport.

Sport persistence can be coded as an indicator of sport performance and commitment, incorporating personality traits such as resilience, adaptive coping, and positive personality traits. Thus, athletes do not merely persist in sporting activities but are qualitatively committed to them. In the present research, we used a qualitative methodology to investigate the factors underlying sport persistence, using Bronfenbrenner's socio-ecological model.