Results 21 to 30 of about 12,048 (161)
Drug and Alcohol Dependence ReportsBackground: Xylazine is a sedative found increasingly in the illicit fentanyl supply that can cause hypotension, bradycardia, necrosis and death. This pilot examined the real-world performance of BTNX xylazine test strips (XTS) in drug residue samples ...
Erin Thompson +7 more
doaj +1 more source
Densificação de compósitos de cobre-grafite
Revista Vértices, 1999 Neste trabalho são apresentados os resultados obtidos no estudo de densificação de compósitos de cobre-grafite, tendo em vista a aplicação destes materiais em contatos elétricos. Foram utilizados duas composições: Cu -5 peso C e Cu -20 peso C. Os pós prensagem uniaxial em matriz de aço temperado (AE=8mm) em 200 MPa.
Santos, Clébio de Azevedo +1 more
openaire +4 more sources
Aplicación del proceso BRISA al tratamiento de menas de cobre conteniendo atacamita
Revista de Metalurgia, 2003 El tratamiento actual de minerales que contienen atacamita y sulfures secundarios de cobre tiene lugar según el proceso TL. La recuperación de cobre en estos procesos es escasa (inferior al 50 %, para tiempos de operación superiores a seis meses).
F. Carranza, A. Mazuelos, R. Romero
doaj +1 more source
StressPerinatal stress is associated with altered placental methylation, which plays a critical role in fetal development and infant outcomes. This proof-of-concept pilot study investigated the impact of lifetime trauma exposure and perinatal PTSD symptoms on ...
Laura R. Stroud +4 more
doaj +1 more source
Revista de Metalurgia, 2005 Se ha estudiado la lixiviación de concentrados de cobre mediante cloro-complejos cúpricos, generados in situ por la reacción entre el Cu(II) procedente del cobre soluble del concentrado y cloruro de sodio en medio ácido.
O. Herreros +4 more
doaj +1 more source
American Journal of Community Psychology, EarlyView.Abstract Research‐Practice Partnerships seek to close the research‐practice gap through developing collaborative, authentic partnerships between researchers and community members. Our team has leveraged Research‐Practice Ambassadors to support socially just and equitable partnership processes in schools.
Danielle R. Hatchimonji +8 more
wiley +1 more source
Acta Scientiarum: Animal Sciences, 2008 Os efeitos de diferentes níveis de cobre no desempenho produtivo e nos parâmetros fisiológicos da tilápia do Nilo (Oreochromis niloticus L.) foram avaliados por um período de 120 dias.
Jeisson Emerson Casimiro Ferrari +5 more
doaj +1 more source
Social Sustainability in Circular Bioeconomy Business Models: Insights From Argentina
Sustainable Development, EarlyView.ABSTRACT Research on circular bioeconomy business models (CBEBM) has largely prioritised environmental and economic aspects, leaving out the social pillar. To address this gap, this paper analyses to what extent and in what ways social sustainability is integrated into CBEBM, based on 12 cases from northern Argentina, a region with high potential for ...
Celina N. Amato +2 more
wiley +1 more source
Lixiviación de calcopirita con ácido etilendiaminotetraacético (EDTA) en medio oxidante
Epistemus, 2023 El cobre en la naturaleza se presenta en forma predominante como complejos sulfurados, calcopirita (CuFeS2), bornita (Cu5FeS4) y calcosina (Cu2S). La recuperación de cobre a partir de calcopirita por lixiviación es un proceso complicado debido a la ...
Carlos Uriel Mendez-Velasco +3 more
doaj +1 more source
Addiction, EarlyView.Abstract Background and aims Tobacco‐free nicotine pouches (NPs) are oral nicotine products promoted by manufacturers and some researchers as tools that may reduce nicotine cravings and support smoking reduction or cessation. However, evidence regarding their actual clinical impact remains limited.
Javad Heshmati +6 more
wiley +1 more source