Chemical laser

Sofya Tkachman AP Biology, A2 Dr. Lau 15 September, 2015 Enzyme Catalysis I. Purpose Measure the activity of catalase in potato extract using several different methods. II. Procedure a) Cut 20 small circles from a large filter paper disk using a hole puncher. Clean and dry several medicine cups and pour hydrogen peroxide into one. Put the catalase enzyme, previously prepared by blending a potato, into another medicine cup. Make a 1/8 dilution of the catalase by adding chilled distilled water.…

Canadian Involvement: The Canadian Parliament didn't choose to go to war in 1914. The country's foreign affairs were guided in London. So when Britain's ultimatum to Germany to withdraw its army from Belgium expired on 4 August 1914, the British Empire, including Canada, was at war, allied with Serbia, Russia, and France against the German and Austro-Hungarian empires. The first major battle fought by Canadian troops in the First World War took place from 22 April to 25 May 1915, outside the…

ABSTRACT Within this experiment, the use of a bomb calorimeter was required in order to determine the heat capacity of the system through the combustion of three separate trials of benzoic acid. The resulting heat capacity values for each trial were averaged, with a standard deviation found as well. This was then used to work backwards, for a naphthalene trial, in order to calculate the change in energy (∆U) and the change of enthalpy (∆H). The accepted value for the change in enthalpy of…

In conclusion, we reported the synthesis of fused and isolated triazoles based on thieno[2,3-d]pyrimidines. The synthesized 1,2,4-triazolo compounds were screened for their anticancer activity at a concentration of 10 μΜ against a panel of 60 cell lines derived from nine different types of cancers, and also screened for their PDE 5 inhibitory activity. The possibility of combining 1,2,4-triazolo moiety to thieno[2,3-d]pyrimidines should open new opportunities for the rational design of…

Atoms are the simplest form of matter. On Earth matter can be a solid, liquid, or a gas. The atoms that create the states of matter also create elements. Currently, there are organized on a chart known as the periodic table, one such element is Germanium. In fact, Germanium has a symbol known as Ge. A symbol is a shorter way to represent the element. All elements have a symbol, atomic mass, atomic number, and a number of protons, neutrons, and electrons. Germanium’s atomic mass is 72.64, this…

The tarnishing of silver is due to a chemical reaction between silver and hydrogen sulfide, producing silver sulfide and hydrogen gas. The balanced chemical equation is 2Ag (s) + H2S (g) → Ag2S (s) + H2. This is a single replacement reaction. This reaction most commonly occurs through contact with hydrogen sulfide in the air - although direct contact with substances that contain sulfur can cause tarnishing. Silver tarnishes very quickly when it is exposed to air that contains high levels of…

main reasons that Neon signs light up is due to when the gas has an electrical charge then the ions and the electrons start to collide and bounce around causing a red light to appear. There are more uses for Neon like making high voltage signs, and lasers. This element (liquid Neon) is also a cryogenic refrigerant and is used to freeze and keep things fresh. The fifth most abundant element in the universe is Neon. You can separate Neon out of the liquid air by fraction distillation. When…

For much of human history, salt has been mined from the areas around dry lake beds and in deposits left after ancient seas dried up. These bodies of water all evaporated, leaving their crystallized salt deposits behind. Mined salt is sourced from these deposits. It differs from sea salt in that sea salt is taken from living oceans. While it is usually ground finely for sprinkling onto food as table salt, some of it is kept in a coarse and chunky form that is referred to as rock salt. Rock salt…

DISCUSSION 2-Bromoheptane + Potassium TertButoxide The 2-Bromoheptane + Potassium TertButoxide reaction yielded 3 different products: 1-heptene, Cis-2-heptene and Trans-2-heptene. However, the major product constituent was 1-heptene. Because Potassium TertButoxide is a bulky base, steric hindrance prevents it from attacking a hydrogen on a highly substituted carbon. Consequently, the base attacks a hydrogen on the least substituted carbon (primary carbon). In this case, steric hindrance is…

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…