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Ramirez-Gonzalez, Daniel,Cruz-Rivera, Jose de J.,Tiznado, Hugo,Rodriguez, Angel G.,Guillen-Escamilla, Ivan,Zamudio-Ojeda, Adalberto Techno-Press 2020 Advances in nano research Vol.9 No.1
In this work, we report the use of caffeine as an alternative source of nitrogen to successfully dope graphene (quaternary 400.6 eV and pyridinic at 398 eV according XPS), as well as the growth of silver nanowires (in-situ) in the surface of nitrogen doped graphene (NG) sheets. We used the improved graphene oxide method (IGO), chemical reduction of graphene oxide (GOx), and impregnation with caffeine as source of nitrogen for doping and subsequently, silver nanowires (NW) grow in the surface by the reduction of silver salts in the presence of NG, achieving a numerous of growth of NW in the graphene sheets. As supporting experimental evidence, the samples were analyzed using conventional characterization techniques: SEM-EDX, XRD, FT-IR, micro RAMAN, TEM, and XPS.
Jose Armando Hernandez-Diaz,Jorge Jonathan Oswaldo Garza-G,Victor Garcia-Gaytan,Janet Maria Leon-Morales,Adalberto Zamudio-Ojeda,Soledad Garcia-Morales 한국원예학회 2021 원예과학기술지 Vol.39 No.4
In this study, the effects of different concentrations of vanadium (V), selenium (Se), cerium (Ce), and iodine (I) on the growth parameters, biomass accumulation, and content of photosynthetic pigments during the seedling stage of marigold (Calendula officinalis L.) were evaluated. The beneficial elements V (3, 5, or 10 μM), Se (5, 10, or 20 μM), Ce (25, 50, or 100 μM), and I (5 or 10 μM) were applied once a week along with 50% Hoagland nutritive solution. Four applications were applied to the roots. Doses of 5 μM V and 50 μM Ce improved plant height, while 5 μM I promoted root growth. Leaf area and number of leaves increased with the application of 20 μM Se and 5 μM I, respectively. High concentrations of Se and Ce improved leaf dry weight, while 10 μM V increased the photosynthetic pigment content. The application of these elements contributed to the development and production of marigold seedlings during nursery growth.