Fraction

For the first question, I told the student the two fractions were equivalent. I asked him what the denominator would be for the second fraction and he said 8. He stared at the problem for a minute and then wrote “x2” next to the 1 and 4 of the first fraction. I asked him how he decided 8 was the denominator was 8 and he said “I multiplied the numerator and the denominator by 2 because 2 is the numerator in one of them.” Question 2: For the second question, I said “2/3 is equal to how many…

Chromatography, or GC, was used to analysis the components of each fraction taken during the experiment. Upon looking at the data, the presence of hexane in the fractions decreased, whereas, the presence of octane increased. This was due to the fact that the hexane was evaporating out of the conical reaction vial and collected once condensed in the distillation head. As time progressed, most of the hexane was removed,…

prior knowledge of adding and subtracting fractions. The exercise should include a problem that requires the students to identify an equivalent fraction. Arouse interest in the topic by including visual aids with the problems. The visual aids should reference back to objects or topics that are familiar to the students. Introduce the concept of fraction strips. Show the students a completed fraction strip chart, then provide the students with their own fraction strips. Allow the…

Part TWO: Part TWO: 1. Reflecting on Constructing the Fraction Materials a. I constructed my materials by hand with a pencil, ruler, and scissors. After I constructed my materials I used a laminator to laminate them so that they would retain their shape. b. To make my fraction strips, first I folded a piece of construction paper hot dog style into fourths. I then cut out the four sections along the folded lines. I then took one of the sections and measured how long the paper was (hot dog…

different fractions of a mixture of hexane and toluene at differing temperatures. From there, the fractions would be measured via gas chromatography to discover the percent composition of hexane and toluene in each fraction with the ultimate goal of having one fraction with mostly hexane, one with mostly toluene, and one with an even mixture of the two. Along with this, there is also the goal of redistilling one of the fractions in order to further reduce impurities by leaving the fraction with…

each four fractions. The boiling point range for the first fraction was 29.3°C to 29.5°C. The boiling point range for the second fraction was 31.1°C to 40.6°C. The boiling point range for the third fraction was 65.8°C to 67.7°C. The boiling point range for the fourth fraction was 78.8°C to 80.1°C. A gas chromatograph is a device that measures the content and the percentage of the tested sample. For the Gas Chromatography part of the experiment I injected a 2 microliter sample of each fraction…

was comprised of three parts, the purpose of which was to separate a protein mix and analyze the results. The first part was separating the proteins; the second part was reacting the proteins with an enzyme, and the third part was analyzing each fraction from Part I to see if separation was successful. It was hypothesized that out of the four proteins in the mix that the glucose oxidase which had the greatest negative charge out of the four proteins would elute last. The hypothesis was supported…

and butanone were mixed together and then put through the distillation process in order to obtain each as a pure substance. These substances were boiled into vials that gave us fractions #1-4. Fraction #1 was obtained through simple distillation and fractions #2-4 were obtained through fractional distillation. The fractions were then ran through a gas chromatography machine to test how pure the product really was. The experiment proved that fractional distillation was much more effective than…

Biochemical foundation for each of the four enzymatic assays performed on each cellular fraction. We performed various assays on each of the four log phase culture fractions, as well as the extracellular fraction from a stationary phase culture, to test the localization of the enzymes. For the protease assay, a specific soluble chromogenic substrate called azocasein was employed to determine presence of enzyme activity. The degradation of this substrate in trichloroacetic acid produces a colour…

standard curve of p-nitrophenol was drawn at the start of the project, before any enzyme assay of the fractions. The standard curve is set up so the equation of the line can be used to measure the enzyme activity in each sample fraction. P-nitrophenol shows a linear relationship with acid phosphatase. An Enzyme assay gives the activity levels of acid phosphatase in each fraction. The results from each fraction were placed into the equation of the line from the standard curve of p-nitrophenol. A…