Luminescence

easy to incorporate a glow stick into a child’s outfit so they can be easily seen by traffic, and so parents can easily spot them in a crowd. Glow sticks have evolved to form an infinite amount of uses. Many scientists are credited for their different patents for glow stick devices, but they all based their designs off of Dr. Edwin Chandross. In a laboratory in 1962, he cooked up the recipe. Chandross was a chemist at the Bell Labs who used chemical energy to emit light. While at the Bells Labs, he was able to test more of his theories. He experimented with luminol, but that failed to give him the results he was looking for. After creating a test compound that faintly lit up, he only had to try a few more times to achieve the active luminescence-producing combination. Chandross created what is now a party staple in just one day (Gaston, 2017) Inside a glow stick, there are actually two separate compartments, both of which contain two different chemical solutions. In most glow sticks, one solution contains a diphenyl oxalate compound. Also in that solution is a dye whose identity varies on the desired color. The second solution is hydrogen peroxide and is contained inside an inner glass cylinder. The cylinder keeps the two solutions separate, therefor keeping the reaction from occurring. When the glow stick is snapped, the cylinder breaks, allowing the two solutions to mix. When the solutions mix, it kick starts the reaction which then leads to the glow. As a precaution,…

A glow stick is a small plastic tube with chemicals inside it. When When you snap a glow stick and hear it crack it gives off a temporary glow. As you snap the glow stick and hear it crack. Chemicals inside the glow sticks starts to mix together. This is a process call chemiluminescence. Chemiluminescence is a process where light is produced by a chemical reaction. Instead of using an electrical source. An example of this would be if go outside during a fall night and see a firefly glowing…

paramagnetic signal without illumination (fig. 9 [1]). According to recent reports, the green luminescence of ZnO at ? ˜550 nm is due to the oxygen vacancies due to the formation of deep levels in the band gap. For the samples prepared between ?250?^o C and ?800?^o C, they show no luminescence even though the samples prepared between ?150?^o C and ?250?^o C does. This observation suggests that the luminescence at ? ˜550 nm and EPR signal at g ˜2.00 might not be related to V_o point defects.…

include the following CXCL 11, CXCL 10, and CXCL 9. DNA purification (Mini prep) helps to determine the concentration of both GFP and NFkB DNA before being used to transfect both HeLa and HEK 293 cell. The purification of DNA also allows the extraction and purification of plasmid DNA. According to the data that was generated by the completion of the Mini Prep, GFP DNA tends to have a higher concentration of 27.544 µg compared to NFkB DNA that has 16.950 µg. GFP DNA is considered to have…

strain of pKN800 plasmid DNA. The plasmid was purified and isolated, then cut with PstI restriction enzyme to create a sample of PstI-cut and uncut pKN800 plasmid DNA and to distinguish orientation A from B. These samples were loaded onto a 0.8% agarose gel for electrophoresis. Both cut and uncut plasmid DNA were transformed into E. coli DH5α. Finally, the transformed DNA was plated on LB and LB with ampicillin agar plates. The procedure for this experiment was followed on pg. 16-23 of the MB…

Molecules Project 1: Chemiluminescence Luuk Adema & Ewout van der Veer S2794640 & S2680254 luukadema@hotmail.com & ewoutvanderveer@msn.com 31-10-14 F. Mecozzi, E. Hagting & M. van Zuylen Abstract Luminol was synthesized and the light intensity of its luminescence was tested. The yield of the synthesis was 55%. Measurements of the intensity of luminescence were done under standard and optimal conditions resulting in peak intensities of ±0.02 lux (standard) and ±0.03 lux (optimal). It has been…

Archaeologists today have a wide selection of ways to correctly date ancient artifacts. The available methods allow them to accurately date objects that are hundreds of years old up to a few million years old. Dating methods are used to find out about how old an artifact may be, or how old it is exactly. Relative dating methods are stratigraphy and style analysis. Absolute dating methods used are absolute dating, radiocarbon dating, uranium-lead dating, and luminescence dating. Stratigraphy as…

this experiment was dependent on the presence of a metal ion and the ligand photoluminescence in DMSO (Dimethyl sulfoxide) was dependent on the d-block metals that are effective in the named solution. However, there was an increase in intensity associated with the formation of the metal-to-ligand ratio of 1; 2, which resulted in the formation of a larger molecule. This therefore indicates the interaction between the metal and ligand due to complexation which thereby causes a reduction of…

Fischeri on a petri dish whilst emitting its bioluminescence. (Grant D. Geske et al, 2007). Biochemistry & Metabolism: The luminescence that is produced by Vibrio Fischeri is actually a product of one of the biochemical reactions this organism carries out. This reaction is catalysed by the enzyme luciferase. Luciferase uses oxygen that has been taken from the environment to oxidise a reduced Flavin mononucleotide and aliphatic aldehydes. The end products of this reaction include aliphatic acids,…

These energized particles then follow the magnetic field lines and move towards the north and south polar regions of the Earth’s atmosphere, where they collide with molecules, releasing energy in the form of the aurora lights (64 Bacon). The phenomenon of aurora are an example of luminescent emission, which results in the brilliant display of light. “As the charged particles interact with charged atmospheric gases in Earth's ionosphere, the electrons in the gases move to higher energy states. As…