Electrophoretic deposition (EPD) is a combination of electrophoresis and deposition techniques. It is a process where charged powder material is dispersed in a solvent before it is attracted by a direct current (DC) electric field and deposited onto a conductive substrate of opposite charge surface (Besra & Liu, 2007). There are two types of electrophoretic depositions; cathodic electrophoretic deposition and anodic electrophoretic deposition. The former occurs when positively charged particles are deposited at the cathode and vice versa. A schematic diagram of both processes is shown in Figure 1. According to Tassel & Randall (2006), four main characteristics of EPD include: i.) well dispersed particles move independently in a solvent suspension ii.) electrochemical equilibrium with the solvent creates a surface charge on the particles iii.) particles move electrophoretically in the bulk of suspension iv.) a rigid deposition of the particles is produced on the deposition electrode. EPD is used to fabricate ceramic coatings that are wear-resistant and non-oxidant, functional films and develop novel composites especially bio-ceramics to form durable structures for orthopaedic applications via fabrication (Boccaccini et al., 2010). EPD also helps to stabilize nanosized particles in colloidal dispersions onto the surface of an electrode by electrostatic mechanisms (Cao, 2004). Advantages of EPD technique are short formation time, easy to set up, less restriction on the
In exercise one we simulated the arrival of a small group of moose that swam to Isle Royal. The simulation ran over time so that the moose can form a large population on the island. We studied this population of moose before the wolves’ arrival. The simulation ran for 50 years. After the 50 years simulation was complete the data was collected and analyzed.
Fig1 shows on the right group one next to it, 1st half of our result on electrophroresis gel. The 2nd half for the gel is our experiment compared to Anderson group 6. The 1st layer in all 3 pictures is the bound dye, the 2nd layer is the free dye.
Today with my group lab we had to discuss on how to design an experiment that investigated the two herbicides DCMU and DCPIP. We used Elodea leaf and Elodea is basically a genus of aquatic plants often called the waterweeds and can be found anywhere in a pond or under water. So we started by creating a solution of phenol red, by adding 5 drops of concentrated phenol red to 40mL of water, then one of our group member used a straw to gently blow air into the solution until it reaches a neutral pH. We then transferred the solution into two test tubes evenly and labeled each tube dark and light, meaning the dark one will stay in the dark and the light one will stay under light bulbs. We predicted that dark one will stay the same and the light
The primary productivity of Elodea in response to different wavelengths of light. The term production initially means the creation or making of something, for instance organic matter. However productivity is the rate of growth or biomass increase in plants (or animals). This is increase of biomass or growth in plants, is generally caused by photosynthesis (6 CO2 + 6 H2O Light Energy C6 H12 O6 + 6 O2), which converts light energy into chemical energy therefore creating new plant tissues and new compounds and structures are synthesised and cells division. In order for photosynthesis to occur, a plant requires sunlight, carbon dioxide and nutrients.
#1) What is an electrochemical gradient, and why is it so important when discussing the movement of ions across cell membranes?
Michael Gugliotta 12/3/14 Chemistry Period 8 Electrolysis Lab During this experiment, we saw electrolysis in action. Electrolysis occurs once an electrical wave hits an object. Electrolysis only occurs when it is in a salt-based or an ionic compound.
The purpose of the DNA restriction and electrophoresis lab was to first become familiar with the properties of restriction enzymes and discover that they, along with agarose gel electrophoresis, are used to characterize DNA molecules. Restriction enzymes are used to make cuts or join together DNA fragments. The cuts result in either staggered cleavage, or blunt cleavage. Staggered cleavage results when the breaks are offset. This cleavage usually results in sticky end being produced because for each DNA end that is produced there are extensions with unpaired nucleotide bases. Blunt cleavage results when the breaks in the phosphodiester bonds are right across from each other.
Ceramic on UHMWPE is one of the most commonly used alloys in biomedical implant materials. This alloy is used for artificial
Take an electrophoresis chamber and take out the UVT gel tray within the chamber. Grab a millimeter grid and place it on the electrophoresis chamber stage, then place the UVT gel tray on top of the millimeter grid.
The Fe-Co deposit obtained from ethaline and reline was successfully deposited on a copper substrate by maintaining a steady potential of 3.0 V at 60℃ for 2 hours. The Fe-Co coating from reline was dark black in colour, whereas the Fe-Co coating from ethaline appeared to show a tint of grey on the surface. The Fe-Co deposits in both liquids were smooth and uniform. Figure 6.3 a and b show the SEM images of Fe-Co deposited from ethaline and reline. It is clear from the images that there is a variation in morphology from both liquids. The Fe-Co coating from reline appears to show a more nodular shaped structure which is evenly spread on the surface of the copper substrate when compared to Figure 6.3 a.
Liquid chromatography would be best because of the differing polarities of illicit drugs. A stationary phase will be chosen that has a polarity that will bind to each of the different drugs in slightly different affinity
Modern medicines, like insulin, are made by using genetically engineered bacteria. Bacterial transformation is used to engineer bacteria to produce these medicines. Scientists are able to transfer DNA from other organisms to bacteria, commonly through plasmids, to transform the bacterial DNA. Scientists have been able to artificially stimulate the bacteria to uptake certain chosen genes and then incorporate them into their genomes through transformation. This is often done by the use of a heat shock process in order for the chosen genes to be transformed into the bacteria’s original DNA. If the transformation process was successful, the foreign genes in the transgenic bacterium will be expressed through the production of proteins. The bacterium have the ability to clone themselves and a fast
Diffusion Lab James D. Motley Biology Lab B Period 2 Uma V. CECP ABSTRACT: In this lab I used water, agar cubes, a beaker and a scale to see whether diffusion increased or decreased the volume of the agar cubes. I let the cubes sit in water overnight, then weighed them to see if the volume changed. In conclusion, the volume increased, because of the water soaking into the cubes.
Background Students had been taught ‘Electrochemistry’ as outlined in the IB Chemistry syllabus. Investigation Design an experiment that allows you to investigate a variable affecting the rate of electroplating. Your research question must be focussed and specific and must enable you to carry out your experiment safely and within the allocated time. Safety Show your research question to your teacher. Complete a safety hazard assessment before writing a full plan (a + b). Ensure your teacher approves this. Experiment If your plan is safe you will be allowed
In order to test the hypothesis that the WRKY75 transcription factor directly regulates FLS2 expression, electrophoretic mobility shift assay (EMSA), the CRISPR/Cas9 and microarray techniques can be implemented. Firstly, an EMSA will be conducted to determine whether WKRY75 is a transcriptional factor that regulates and binds to pFLS2. The DNA probe that will be used is the pFLS2 double-stranded DNA sequence, which contains the regulatory element. WRKY75 will be determined as a binding protein if we observe band shift, as electrophoresis separates molecules based on charge and size; therefore, DNA attached to a protein will take longer to migrate through the gel. If WRKY75 is determined to be a transcriptional factor of pFLS2, we can implement the CRISPR/Cas9 technique.