Gonzalez-Mendoza Daniel, Valdez-Salas Benjamín, Bernardo-Mazariegos Erick, Tzintzun-Camacho Olivia, Gutiérrez-Miceli Federico, Ruíz-Valdiviezo Víctor, Rodríguez-Hernández Ludwi, Sanchez-Viveros Gabriela
Universidad Autonoma De Baja California, Mexicali, Mexico.
Instituto de Ingeniería de la Universidad Autónoma de Baja California, Calle de la Normal s/n y Boulevard Benito Juárez, 21100, Mexicali, Baja California, México.
Open Life Sci. 2019 Mar 20;14:62-68. doi: 10.1515/biol-2019-0008. eCollection 2019 Jan.
The present study was conducted to evaluate the impact of monometallic and bimetallic nanoparticles (NPs) of copper (Cu) and silver (Ag) from on the photochemical efficiency and phenol pattern of . In this study, the existence of localized surface plasmon resonance absorption associated with the nano-sized nature of Ag, Cu and Cu/Ag particles was confirmed by the presence of a single peak around 487, 585, and 487/580 nm respectively. Zeta potential and electrophoretic mobility were found to be 0.2 mV and 0.02 μmcm/(Vs) for synthesized NPs indicating less stability and thus tendency to agglomerate, and broad distribution of particles. Cu-NPs and Cu/Ag-NPs demonstrate that the dispersed phase is stable and has a minimum particle size at zeta potentials above -30 mV. Changes in phenolic compounds, total chlorophyll, and photochemical efficiency in leaves exposed to Ag, Cu and Cu/Ag phyto-nanoparticles were evaluated up to 72 hours. The results revealed that Ag-NP and Cu-NP from at 100 mg/L showed significant reduction in chlorophyll, epidermal polyphenol content and photochemical efficiency of . In contrast, the application of bimetallic Cu/Ag-NP from showed a positive impact on physiological parameters of after 72 h of exposure.
本研究旨在评估来自[具体来源未明确]的铜（Cu）和银（Ag）的单金属和双金属纳米颗粒（NPs）对[具体研究对象未明确]的光化学效率和酚类模式的影响。在本研究中，通过分别在487、585和487/580 nm左右出现的单峰，证实了与Ag、Cu和Cu/Ag颗粒的纳米尺寸性质相关的局域表面等离子体共振吸收的存在。合成的纳米颗粒的zeta电位和电泳迁移率分别为0.2 mV和0.02 μmcm/(Vs)，表明稳定性较低，因此有团聚的趋势，且颗粒分布较宽。Cu-NPs和Cu/Ag-NPs表明，在zeta电位高于-30 mV时，分散相是稳定的，且粒径最小。对暴露于Ag、Cu和Cu/Ag植物纳米颗粒的叶片中的酚类化合物、总叶绿素和光化学效率的变化进行了长达72小时的评估。结果显示，来自[具体来源未明确]的100 mg/L的Ag-NP和Cu-NP使[具体研究对象未明确]的叶绿素、表皮多酚含量和光化学效率显著降低。相比之下，来自[具体来源未明确]的双金属Cu/Ag-NP在暴露72小时后对[具体研究对象未明确]的生理参数产生了积极影响。
