Analyze Essay Example | Topics and Well Written Essays - 500 words - 1

Analyze - Essay Example In the first story, Graduation by Maya Angelou, the author tends to explain an array of emotional turmoil that the protagonist undergoes; she is a young girl belonging to an African American race thus making her skin tone black as compared to the other white students in her classroom. The story is set in the 1940s, the year which she is to graduate and at the final graduation day speech, her heart begins to flutter as she listens to one of her professors speak proudly about the â€Å"white students† as he goes on and on about how they will prosper and become the next generation of famous scientists, architects, artists and politicians of the country. He completely undermined the feelings of those students that belonged to other races and in this manner discriminated against them; the young girl felt disappointment, anger, sadness and then pride within herself during the course of the speech. When the valedictorian, a young classmate by the name of Reed gave his speech, he trie d to encourage those that had been left out and the girl felt happy that there were some people who thought differently. She made it a point to be proud of her background instead of being angry at the professor; she understood that people would probably discriminate against her in the long run in life however she motivated herself to do extremely well in life and not hear their taunts. She thus overcame her challenge by moving on and not thinking about things that people say who do not even matter. The second beautiful piece, ‘A Hole in the Wall’ by Andrea Barrett is a wonderful account of a couple moving into Brooklyn to spend their lives with each other. The author talks about the shoddy surroundings where they took up a dwelling however the love and affection with which she had begun to care for the place; with time, she began to overcome her fear of living in a less luxurious place and gave in

IR Spectroscopy determination of xylene using an internal standard Essay

IR Spectroscopy determination of xylene using an internal standard - Essay Example This will be used to show the various concentrations of the m-xylene and p-xylene in the unknown sample. Infrared spectroscopy is the spectroscopy that uses the infrared region of the electromagnetic spectrum, which is a region of lower wavelength than visible light, exciting molecules to higher vibrational states in order to detect energy of the vibrational modes in your sample. The infra-red radiation is passed through a sample by an infra-red spectrometer which uses a detector to represent the transmission in graphical representations. Infra-red spectroscopy can be used to study virtually every sample in any state of matter and the IR spectrometer utilizes FTIR spectroscopy which has improved the infrared spectra quality within a short time of analysis. This technique has been in existence since 1940’s where the instruments relied on prisms as the elements to disperse the radiations but further development has occurred which include the diffraction gratings and finally the most significant the use of interferometers and Fourier-transformation mathematical process. Infrared sp ectroscopy can be used a number of ways, one of which is based on absorption spectroscopy. Isomers of organic molecules display a unique vibrational frequency; thus by analyzing a specific region of the spectrum, overlaying pure and different concentrations of a sample molecule as well as any background spectra it is possible to determine the concentration of an unknown sample From the results the concentration of p-xylene and m-xylene in the two samples was determine using the Fourier transform infrared spectrometer using the internal standards. It was observed it is possible to calculate the exact concentration of both p-xylene and m-xylene in the samples if the exact concentration of the stock solution used is known. This determines their