United Tribes Technical College

This study presents a novel and facile technique for the rapid and sensitive detection of zinc (Zn) in foods and drinking water. The need for a reliable method to monitor Zn levels in consumables is crucial due to its significance in both nutritional assessment and environmental safety. The proposed technique integrates state-of-the-art sensing technology with an easy-to-implement approach, aiming to provide an efficient solution for Zn detection. The methodology involves the utilization of complexation of Zn2+ ion with resorcinol and use of UV-vis spectrophotometry, which demonstrates high sensitivity towards Zn2+ ions. It detected zinc up to 10-5M solution.

Silver (Ag)-based materials have shown great application potential in the oxygen reduction reaction (ORR) and hydrogen peroxide (H2O2) detection. The porous structures of Ag have attracted a lot of research interest due to their large specific surface area and high electrochemical activity. In this work, nanoporous Ag structures composed of nano-sized particles were prepared by a one-step pulsed laser deposition (PLD) under controlled background gas pressure. The porous PLD-Ag showed a high ORR performance (Eonset: 1.007 V vs. RHE, E1/2: 0.863 V vs. RHE), high sensitivity (613.1 μA cm-2 mM-1 at -0.2 V vs. SCE) and selectivity for H2O2 detection. The PLD technique provided a new, yet universal approach to producing high-performance, metal-based electrochemical electrodes.

American Indians, Alaska Natives, and Native Hawaiians (AI/AN/NH) experience the lowest rates of college retention and significant barriers to graduation. In addition, AI/AN/NH individuals face health challenges that include higher rates of obesity, overweight, and type 2 diabetes. We designed a culturally relevant life skills curriculum based on family and consumer science standards to promote educational achievement, self-efficacy, and healthful food choices among tribal college students. The Life Skills at a Tribal College course was delivered by tribal college Extension professionals in a family meal–style environment and involved culturally appropriate, traditional ways of learning to promote positive educational and health outcomes.

Based on an empirical perception of the growing demand for mapping the favelas of Rio de Janeiro, the present work launches an investigation about the when, how and why there have been such advancements on the representation of these areas. To respond to when, we revisited the history of Rio's favelas -and, consequently, the gradual achievement of social rights acquired by its residents -opposing this background to its representation in historical maps. At this point, we highlight two aspects: the exponential increase of the number of favelas' mapping projects, especially of the ones where there are Police Pacification Units (UPP), due to the city's preparation for the mega events (World Cup and Olympics); and the recurrent use of the participatory mapping concept in most of the projects that make use of local residents' expertise. Based on this reflection, we have developed a particular method to analyse the projects, through which it was possible to conclude that, despite the fact that most of the projects sell themselves as 'participatory', there are some rare cases in which the population is actually invited to think critically about the mapping actions and the development of the method, or even about the implications of these actions, the records of the local memory etc. Therefore, after close monitoring of two great agents' projects (Google and City Hall of Rio de Janeiro), one can conclude that their core is not based on the content of the projects themselves, nor on the life improvement of the favelas' population, but on the promotion and the spectacle of performing such actions.