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Physical Sciences and Mathematics Commons™
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Full-Text Articles in Physical Sciences and Mathematics
Size And Concentration Analysis Of Gold Nanoparticles With Ultraviolet-Visible Spectroscopy, Sanim Rahman
Size And Concentration Analysis Of Gold Nanoparticles With Ultraviolet-Visible Spectroscopy, Sanim Rahman
Undergraduate Journal of Mathematical Modeling: One + Two
Spherical gold nanoparticles (GNPs) are synthesized by Turkevich Method and PEL 35 UV-VIS spectrophotometer recorded the wavelength and absorption of the Surface Plasmon Resonance (SPR) peak. The diameter and concentration of solute GNPs are calculated. The concentration of GNPs is done with Beer’s law. The average diameter of GNPs is done via the ratio of SPR peak to the absorbance at 450 nm. The diameters are compared to SEM scan of synthesized GNPs and Sigma-Aldrich values.
Diffusion Of Vitamin B12 Across A Mesoporous Metal Organic Framework, Veronica Valencia
Diffusion Of Vitamin B12 Across A Mesoporous Metal Organic Framework, Veronica Valencia
Undergraduate Journal of Mathematical Modeling: One + Two
We measure the rate of uptake and the rate of release of a Vitamin B12 solution (dissolved in water) at 2 different temperatures (room temperature and 37°C) by the mesoporous metal organic framework TbMOF-100 at 1-hour intervals using a spectrophotometer. Using the Beer-Lambert law, we calculate the concentration of the stock solution based on the absorbance values obtained with the spectrophotometer. These values allow for the quantification of the initial rate of uptake and the rate of uptake at a random incubation time of the Vitamin B12 by the TbMOF-100. We also calculate the value of the coefficient of diffusion …