Chemical decomposition

In this lab, we did four kind of different test, to mimic the chemistry of digestion. The first one was to test for sugar. We used a dropper and measured 2 ml of maltose and 2 ml of benedict’s solution in a pyrex test tube. After, using a test tube holder, we placed the test tube in a boiling water bath and heated for 5 min. After the 5 min, using a test tube holder we removed the test tube from the water bath. We then repeated the same procedure using starch solution instead of maltose. When we…

The synthesis started with the [3+2] cycloaddition between chiral nitrone 128 and allyl cyanide under microwave activation at 110°C in toluene to provide cycloadduct 2 in 96% yield as a single isomer (Scheme 1).The regioselectivity was identical to that observed for diverse terminal alkenes, with attack on the terminal methylene by the electrophilic carbon of the nitrone, presumably due to both steric and electronic reasons.29a-f The stereoselectivity results from the approach of allyl cyanide…

solution, which was our dependent variable. An enzyme is a catalyst, and it has two fundamental characteristics that it is known for. One of these things it that it can increase the rate of a chemical reaction without being changed or destroyed in the reaction. The second is that they don’t alter the chemical equilibrium between the reactants and the products while they speed up the reaction. In enzyme catalysis, the substrate, which can also be referred to as the reactant, is transformed…

the liver and hydrogen peroxide were 10℃ also. The liver was put into a 100mL measuring cylinder and the hydrogen peroxide was also poured in as the timer was started. After twenty seconds, several millilitres of froth had been produced from the chemical concoction. This froth was recorded into a results table, and the previous steps were repeated but with increasing temperature increments of 10℃ until 50℃. After carefully completing the experiment, the final results obtained by measuring the…

1a) Yes, there is a correlation between the structures and the observed volatilities of compounds in Step (1a) and Step (1b). In Step (1a), n-pentane had the highest vapor pressure because the compound evaporated the fastest. N-heptane had the second highest vapor pressure, followed by n-decane with the lowest vapor pressure. The molecular structure correlates with the volatility because of the molecular weight for each compound. N-pentane is the lightest compound, followed by n-heptane and…

Number6. This is known as the ‘goddess’. Start with hands straight over your head in mountain position. Then spread your legs apart and bend them until you can feel your thighs being parallel to the ground. Spread your hands on the both side of your head and lift them up at a ninety- degree angle. Hold onto this position for at least 10 seconds for five rounds. Number7. Stand straight. Now, lean on the left side with your left elbow touching the left knee. Swing your right hand over your head to…

Neon is one of the world’s rare and most expensive elements. I chose Neon because of it's uniqueness. In 1898, William Ramsay and Morris Travers at University College London isolated krypton gas by evaporating liquid argon. They had been expecting to find a lighter gas which would fit a niche above argon in the periodic table of the elements. They then repeated their experiment, that time allowing solid argon to evaporate at a slow pace under reduced pressure and collected the gas which came off…

In addition, higher SGR of V. parahaemolyticus was observed as the temperature increases. The MPD values of V. parahaemolyticus varies from the lowest 7.00 to the highest 8.91, regardless of the type of V. parahaemolyticus strain at the 3 different temperatures. The differences in LT values were increased as the temperature was increased. At 20 °C, the shortest LT was observed with the (tlh+) strain, followed by (tdh+/trh+), the mixture, the (tdh+) and the (trh+). At 25°C the strains likely kept…

The second most abundant element in the Earth’s crust other than oxygen is silicon which if by mass is around 25.7g or 23%. However in nature, silicon never exist as a free or pure element but instead it mostly combines with the most abundant element in the Earth’s crust, oxygen, hence producing silica (SiO₂) or silicate minerals. The most prominent charge of Si in the crust is +4 rather than +2 which involve a silicon atom to bond in a tetrahedral manner with 4 other oxygen atoms giving rise to…

multistep synthesis reactions that DELs are produced are similar to the reaction from this experiment, but far more complex. While the DNA encoded library portions are produced, the molecule is attached to an encoding DNA oligomer. For this reason, the chemical diversity of DELs is limited to DNA compatible synthesis reactions. Various examples of these multistep synthesis reactions include isoindolinones, benzimidazoles, thiazoles, imidazolidinones, and quinazolinones. Some derivatives of these…