Art History Video Essay Example | Topics and Well Written Essays - 500 words

Art History Video - Essay Example It appears dark, but this is not due to its lack of maintenance but since it is made out of porous sandstone. Stained glass windows are also a prominent feature in the video. The bells of the cathedral are also evident in the video, and some appear very heavy yet fascinating. Tower stairs of the cathedral have been portrayed to be extremely steep, but still they leave a very great impression on the writer. Generally, the view of this huge Church is very breathtaking; its large size, well painted windows on the outside, deep stairs and the general breathtaking. This cathedral has also has beautiful mosaic patterns and an overall grandeur. Built at around the 12th and 13th centuries, the cathedral is one of German’s greatest architectural constructions. This masterpiece is situated at the heart of Cologne, and it is the third tallest cathedral all over the world. Its construction began in 1248 and then it took a total of 600 years for the cathedral to be completed. It was completed in 1880. The building was constructed so remarkably in such a way that, even in the Second World War when German cities were flattened by bombings, the cathedral still remained, standing tall. The cathedral has many treasures but the four principle treasures are the shrine of the three holy kings, Gero Cross, Modern Mosaic Glass Window and Milan Madonna. What is striking about this cathedral is its gigantic size that it has occupied in the center of the city of Cologne. This has given it aesthetic value, but the windows have been decorated amazingly which has added to the aesthetic value of the building. Building projects nowadays and in the Middle Ages are very different. In the present world, housing projects are a very common occurrence and it takes a few years to complete the construction. However, Cologne Cathedral took a total of about 600 years which implies that considerable amounts of energy and hard labor were used in ensuring

NMR Lab Report Example | Topics and Well Written Essays - 250 words

NMR - Lab Report Example Hydrogen bonding stabilizes the enol form in polar solvents contrary to the non-polar solvents that lack hydrogen bonding. Stabilization of the enol form is attained by intramolecular hydrogen bonding. The HNMR spectrum for compound CH3OH display two peaks with a chemical shift of 4.9287 and 3.3721 and integration of 1 and 3 respectively. The computed equilibrium constant for acetylacetone in CCl4 is higher than the equilibrium constant for acetylacetone in CH3OH. The equilibrium constant for acetylacetone in CCl4 is higher than that in CH3OH because it is a non-polar solvent. The equilibrium constant is a ratio of the quantity of enol form to the quantity of keto form. Therefore, the quantity of keto form is inversely proportional to the equilibrium constant. The keto form increases with increase in solvent polarity because keto is favored by hydrogen-bonding solvents. The CH3OH compound used in this experiment display only two peaks in the NMR spectrum. The spectrum lacks the OH peak thus gives a slightly lower keto form than expected. The main factor in stabilizing any form is the intermolecular hydrogen bond. From research, the polar solvent has the capability of establishing two intermolecular bonds in one molecule and the non-polar solvent establishes only one intermolecular hydrogen bond. (Malcolm). However, in this case, the polar solvent only establishes one intermolecular hydrogen bond. The temperature affecting the equilibrium constant is related to the equilibrium change in enthalpy to that of