Highly sensitive and selective fluorescent "turn-on" sensor for Ag+ detection using MAPbBr3@PCN-221(Fe): An efficient Ag+-bridged energy transfer from perovskite to MOF.

Metal ion-induced water pollution is attracting increasing public attention. Perovskite quantum dots and metal-organic frameworks (MOFs), owing to their outstanding properties, hold promise as ideal probes for detecting metal ions. In this study, a composite material, MAPbBr3@PCN-221(Fe), was prepared by encapsulating MAPbBr3 quantum dots with PCN-221(Fe), demonstrating high chemical stability and good reusability. The composite material shows a sensitive fluorescence turn-on signal in the presence of silver ions. The fluorescence intensity of the composite material exhibits a linear relationship with the concentration of Ag+ in the solution, with a low detection limit of 8.68 µM. Moreover, the fluorescence signal exhibits a strong selectivity for Ag+, enabling the detection of Ag+ concentration. This fluorescence turn-on signal originates from the Ag+-bridged energy transfer from the conductive band of MAPbBr3 to the excited state of the MOF, which is directly proportional to the concentration of silver ions. Simultaneously, this finding may open up a new possibility in artificial controlled energy transfer from perovskite to MOF for future development.

Water-stable perovskite CsPb2Br5/CdSe quantum dot-based photoelectrochemical sensors for the sensitive determination of dopamine.

A heterojunction of CdSe quantum dots in situ grown on the perovskite CsPb2Br5 (CsPb2Br5/CdSe) for water-stable photoelectrochemical (PEC) sensing was simply synthesized using the hot-injection method. Due to the inherent built-in electric field and the matching band structure between CsPb2Br5 and CdSe, the CsPb2Br5/CdSe p-n heterojunction demonstrates enhanced photoelectrochemical properties. Accelerated interfacial charge transfer and increased electron-hole pair separation enable hydrolysis-resistant CsPb2Br5/CdSe sensors to exhibit heightened sensitivity with an ultra-low detection limit (0.0124 µM) and a wide linear range (0.4-303.9 µM) in subsequent dopamine detection. Moreover, the CsPb2Br5/CdSe sensors show excellent anti-interference ability, as well as remarkable stability and reproducibility in water solvent. It is noteworthy that this work is conducted in an aqueous environment, which provides an inspiring and convenient way for photoelectric and photoelectrocatalysis applications based on water-resistant perovskites.

Knee joint injuries in young basketball players / Lesões na articulação do joelho em jovens jogadores de basquetebol / Lesiones de la articulación de la rodilla en jóvenes jugadores de baloncesto

ABSTRACT Introduction Basketball is a popular sport globally, and as the development of college basketball develops, basketball injuries also tend to increase. The knee has the highest injuries and problems incidence, reducing the athlete's ability and shortening their professional career. Objective Explore the causes and characteristics of knee joint injuries in basketball players, comparing their different levels, performances, and positions. Methods 600 college basketball players were studied. Current and past injuries were collected. A questionnaire on lifestyle, behavior, and habits was also applied, and their levels of physical ability and knowledge were also evaluated. Statistical methods were employed to investigate the characteristics and causes of knee joint injuries in young athletes. Results Among knee joint injuries of adolescent basketball players, there were more medial collateral ligament injuries and meniscal injuries. The probabilities are 34.1% and 24.3%, respectively. Patellar strain and cruciate ligament injury accounted for 12.1% and 19.5%, respectively, and the probability of fracture injury was 2.4%. Conclusion The knee joint is one of the most vulnerable joints in basketball. The consequences of its injury can bring an athletic career down and have a considerable impact on athletes' physical and mental health. Evidence Level II; Therapeutic Studies - Investigating the results.

RESUMO Introdução O basquete é um esporte popular em todo o mundo e com o desenvolvimento do basquetebol universitário, as lesões causadas pelo basquetebol também tendem a aumentar. O joelho possui o maior índice de lesões e problemas nessa articulação também reduzem a capacidade do atleta, encurtando a sua carreira profissional. Objetivo Explorar as causas e características das lesões na articulação do joelho em jogadores de basquetebol comparando seus diferentes níveis, desempenhos e posições. Métodos 600 universitários jogadores de basquete foram estudados. Foram arquivadas as lesões atuais e pregressas. Um questionário sobre estilo de vida, comportamento e hábitos também foi aplicado; seus níveis de habilidade física e conhecimento foram avaliados. Métodos estatísticos investigaram as características e causas das lesões na articulação do joelho nos jovens atletas. Resultados Entre as lesões articulares de joelho nos jogadores adolescentes de basquete, houve mais lesões ligamentares colaterais mediais e lesões meniscais. As probabilidades são de 34,1% e 24,3%, respectivamente. A tensão patelar e a lesão do ligamento cruzado representaram 12,1% e 19,5%, respectivamente, e a probabilidade de lesão por fratura foi de 2,4%. Conclusão A articulação do joelho é uma das partes mais vulneráveis do basquetebol. As consequências de sua lesão podem acarretar o fim da carreira esportiva, tendo um impacto considerável sobre a saúde física e mental dos atletas. Nível de evidência II; Estudos Terapêuticos - Investigação de Resultados.

RESUMEN Introducción El baloncesto es un deporte popular en todo el mundo y con el desarrollo del baloncesto universitario, las lesiones causadas por el baloncesto también tienden a aumentar. La rodilla tiene el mayor índice de lesiones y los problemas en esta articulación también reducen la capacidad del deportista, acortando su carrera profesional. Objetivo Explorar las causas y características de las lesiones de la articulación de la rodilla en jugadores de baloncesto comparando sus diferentes niveles, rendimientos y posiciones. Métodos Se estudiaron 600 jugadores de baloncesto universitario. Se presentaron las lesiones actuales y pasadas. También se aplicó un cuestionario sobre el estilo de vida, el comportamiento y los hábitos; y también se evaluaron sus niveles de capacidad física y conocimientos. Se emplearon métodos estadísticos para investigar las características y las causas de las lesiones de la articulación de la rodilla en atletas jóvenes. Resultados Entre las lesiones de la articulación de la rodilla de los jugadores de baloncesto adolescentes, hubo más lesiones del ligamento colateral medial y de menisco. Las probabilidades son del 34,1% y del 24,3%, respectivamente. La distensión rotuliana y la lesión del ligamento cruzado representaron el 12,1% y el 19,5%, respectivamente, y la probabilidad de lesión por fractura fue del 2,4%. Conclusión La articulación de la rodilla es una de las partes más vulnerables del baloncesto. Las consecuencias de su lesión pueden llevar al fin de una carrera deportiva, teniendo un impacto considerable en la salud física y mental de los atletas. Nivel de evidencia II; Estudios terapéuticos - Investigación de resultados.