Wednesday, November 27, 2019

Free Essays on Dali VS Esher

Dali vs. Esher At first glance at Dali’s Swans reflecting elephants, it just appears to be swans swimming on a peaceful lake. At a closer look one should see elephants in the reflection of the swans. The trees are eerie and nightmarish. The blue sky is reflected in the water, which gives it color. All of these aspects raise the question where does the land end and where does the sky begin? Vivid details and curiosities cover every inch of this painting. A man in the moon watches over the lake, a man painted in vivid detail stands on a landscape blurred by impressionism. The message in the painting seems to be to always take a second look, things may not always be what they seem. In M.C Esher’s drawing, Ascending/ Descending, a rectangular inner courtyard is bounded by a building that is roofed in by a never-ending stairway. The inhabitants of this building would appear to be monks, adherents of some unknown sect. Perhaps it is their ritual duty to climb those stairs for a few hours each day. It would seem that when they get tired they are allowed to turn about and go downstairs instead of up. Yet both directions, though not without meaning, are totally useless. Two recalcitrant individuals refuse, for the time being, to take any part in this exercise. They have no use for it at all, but no doubt sooner or later they will be brought to see the error of their nonconformity. It would appear that Escher is making a comment about the drudgery and conformity of these monks. Is he poking fun at religion? While both works of art present many intriguing details, one definitely stands above the other. Dali’s surrealist painting is far superior to M.C. Escher’s drawing. The use of detail in the painting outstrips Escher’s drawing. Dali’s painting also supports its message better, causing the observer to take a second look at everything he encounters in the painting. Is that really just a cloud? Also, the quality and the diff... Free Essays on Dali VS Esher Free Essays on Dali VS Esher Dali vs. Esher At first glance at Dali’s Swans reflecting elephants, it just appears to be swans swimming on a peaceful lake. At a closer look one should see elephants in the reflection of the swans. The trees are eerie and nightmarish. The blue sky is reflected in the water, which gives it color. All of these aspects raise the question where does the land end and where does the sky begin? Vivid details and curiosities cover every inch of this painting. A man in the moon watches over the lake, a man painted in vivid detail stands on a landscape blurred by impressionism. The message in the painting seems to be to always take a second look, things may not always be what they seem. In M.C Esher’s drawing, Ascending/ Descending, a rectangular inner courtyard is bounded by a building that is roofed in by a never-ending stairway. The inhabitants of this building would appear to be monks, adherents of some unknown sect. Perhaps it is their ritual duty to climb those stairs for a few hours each day. It would seem that when they get tired they are allowed to turn about and go downstairs instead of up. Yet both directions, though not without meaning, are totally useless. Two recalcitrant individuals refuse, for the time being, to take any part in this exercise. They have no use for it at all, but no doubt sooner or later they will be brought to see the error of their nonconformity. It would appear that Escher is making a comment about the drudgery and conformity of these monks. Is he poking fun at religion? While both works of art present many intriguing details, one definitely stands above the other. Dali’s surrealist painting is far superior to M.C. Escher’s drawing. The use of detail in the painting outstrips Escher’s drawing. Dali’s painting also supports its message better, causing the observer to take a second look at everything he encounters in the painting. Is that really just a cloud? Also, the quality and the diff...

Saturday, November 23, 2019

Danto essay essays

Danto essay essays Arthur Dantos claim that the end of art has arrived was really an attempt to explain how art history came to an end. While reading Dantos essay, my initial response I perceived was that Danto was claiming art is over. So I thought, why are there still so many art makers or art majors here at Marywood if art were truly over? After further examining the essay and from class lectures, it was more apparent what Danto was claiming. That is, people are still making art but the history of art is over. I agree with Dantos claim and will explain in this essay why the history of art is truly over. Danto does not claim no one is making art anymore or that no good quality art can be created. Rather, that the history of art is finished or over. In other words, art had its story in history and history is therefore no longer being made in art. Today, art makers are simply mirroring the past. Works of art that were produced up until the 1950s and early sixties were all part of the history of art that is now over. Since then, art makers continued to produce works of art but no one is able to say whether it is art or not. Hence, anything could be a work of art today. The evolution of art ended decades ago. For example, one may consider music and fashion and how both, have advanced over the past forty years. Since the introduction of rock and roll music in the 1950s and early sixties, has any new music really advanced or continued to shock anyone? With the exception of Rap music introduced in the seventies, one may agree that no new music has really shocked an audience the way rock American Pie to describe how the 50s music was now over and finished. In the following lyric Oh, and as I watched him on the stage-My hands w ...

Thursday, November 21, 2019

OXIDATION OF METHIONINE BY SINGLET OXYGEN Essay - 1

OXIDATION OF METHIONINE BY SINGLET OXYGEN - Essay Example Transition metal complexes as photosensitizers 16 Semiconductors 17 Immobilized photosensitizers 17 Methionine oxidation 18 Determination of singlet oxygen 21 Aims 24 Materials and methods 25 General Information 25 Oxygen measurements 25 Singlet oxygen consumption at different methionine concentrations 26 Singlet oxygen consumption induced by laser. 27 Results and discussion 27 Conclusions 47 References: 49 Abstract The methionine oxidation reaction using singlet oxygen was studied. Initially this report is focused on presenting the overview of works associated with the topic. Singlet oxygen is described along with the ways it is formed. It was highlighted that singlet oxygen was a more powerful oxidant then triplet oxygen and the types of oxidation pathways are described. The practical aspect of this research is focused on using a photosensitizer, Rose Bengal, to generate singlet oxygen. This is the reason for giving a short overview of photosensitizers is given making focus on the behaviour of Rose Bengal and compounds similar to it in structure. Methionine oxidation mechanism is also described as well as function of oxygen electrode. In order to research the topic of methionine oxidation by singlet oxygen two experiments were carried out. In the first experiment a series of methionine solutions with different concentrations were prepared. In each case Rose Bengal was added as a photosensitizer. As it was established, the rate of oxygen consumption depends on methionine concentration in the solution being the highest at the lowest concentration of methionine. The process was followed by Michaelis-Menten kinetics therefore the corresponding equations were used to construct Lineweaver-Burke plot and determine the maximum rate of the oxidation reaction as well as the line slope. The second experiment utilised a more vigorous approach. A laser pulse was employed to produce singlet oxygen molecules in the dye containing methionine solution. And by employing various concentrations of methionine and Rose Bengal as photosensitizer construct oxygen consumption plots along with determination of variation of centre-of mass d istance and potential energy of the reacting molecules. Methionine oxidation was also described using SPARTAN calculations and the reaction mechanism was presented. This report is initially focused on describing the key literature associated with oxidation of methionine by singlet oxygen, highlighting relevant for the project issues and arguments, then moving on to presenting the research that has been done so far, making accent on the methods used and results achieved, before finally identifying the existing gaps in the study and setting up a plan for future work. Introduction Oxygen was discovered by Joseph Priestley in 1775 (Priestley, 1775). Later, Avagadro described the diatomic nature of oxygen, and the paramagnetic properties of this diatomic gas were studied by Faraday in 1811. Differences between oxygen and other gases such as helium or nitrogen were also investigated (Parkes, 1967). Later in 1928, using molecular orbital theory, it was established that oxygen is paramagnet ic due to the presence of the parallel spins of two electrons occupying the outer shell. This form with uncoupled electron pair was named triplet oxygen. Spectroscopy was used to prove the existence of higher energy state, which later was called singlet oxygen (Herzberg, 1934). In the singlet form of this molecule outer-shell electrons are paired in antiparallel spins. Initially, the importance of singlet oxygen was not recognised. It was rediscovered in 1964 in photooxidation experiments and since then became intensively studied. Over the past twenty five years significant increase in data regarding singlet oxygen has led to the