Microwave Synthesis of 5‚10‚15‚20- Tetraphenylporphyrin Abstract: In this green chemistry experiment of 5‚10‚15‚20-tetraphenylporphyrin was synthesized from benzaldehyde and pyrrole. using microwave irradiation to heat the reactants.‚ The liquid reactants are absorbed on a solid support‚ silica gel‚ which acts as a Lewis acid catalyst to facilitate the reaction. The reaction forms a porphyrinogen‚ which is then oxidized to the porphyrin product by atmospheric oxygen. Column chromatography is performed
Premium Solvent Thin layer chromatography Chemical reaction
their precursors are via radical mechanism or nucleophilic substitution. In this experiment‚ polystyrene‚ nylon 6‚ 10‚ and cellulose triacetate were prepared by different mechanisms. Polystyrene was generated via radical mechanism from styrene. Nylon 6‚ 10 was generated from 1‚ 6-hexanediamine and sebacoyl chloride with the loss of HCl via nucleophilic substitution. Cellulose triacetate was generated by mixing cotton balls and acetic anhydride with acidic condition under heating. Materials: Styrene
Premium Polymer Solvent Acetic anhydride
Regardless‚ the examination discusses the considering of the cash related course of action‚ influencing the association between the advance expenses and the apparent improvement in US‚ UK‚ Germany and Japan‚ which suggests various fundamental factors‚ the introduction did not contain only the authentic scenery of the methodology mechanical assembly and parts of national banks. On the inverse side the definitions or the cash related establishment had been vanished of considering the apparent Gross
Premium Costs Management Cost
Materials and Methods In the experiment‚ a frog was obtained and dissected in a way to expose its heart and then tested using Lab Tutor software‚ a force transducer‚ and the PowerLab hardware (ADInstruments 2014). Frog dissection: Frogs that had been killed by being double-pithed were dissected as described in Lab Tutor. The frog was pinned down with the ventral side up. A longitudinal and a lateral incision were made along the frog’s abdomen. The skin was peeled back and the tissue and sternum
Premium Blood Pregnancy Childbirth
Lab E: Adapted from Experiment #10 TA: Sudipta Biswas Tuesday‚ 1:05pm 10/25/11 Sarah Kempkes Abigail Scherer Abstract: The purpose of this experiment was to create and obtain pure acetaminophen. p-aminophenol and acetic anhydride were used to create acetaminophen and acetic acid. The acetic acid mixed with acetaminophen created an impure sample‚ which was purified through the addition of a water/methanol solution. The percent recovery of acetaminophen from the impure sample to the pure
Premium Chemistry Acetic acid Experiment
compared different demographics between immigrants and refugees from the same origin. There were five areas of origin for the majority of these refugees: Afghanistan‚ Iraq‚ Iran‚ the Middle East‚ Somalia‚ and former Yugoslavia. Another factor to keep in mind are the inherent biases that may be in place when diagnosing mental health cross-culturally. For instance‚ having a level of fear towards a parent figure may be different from culture to culture‚ so when these refugees move to a different culture
Premium Psychology Mental disorder Psychiatry
ever done in your life. All your actions and emotions towards things–how naturally did they come? The cultural background of a person sways him or her to act in certain ways. Culture is the source of what one comes out to be‚ even after many years from what he or she first saw of a culture. A person’s culture affects all of his or her life and even shapes who the individual is now. In the short story “Dave Barry Does Japan”‚ Dave Barry uses himself and his experience to show that one’s culture shapes
Premium Native Americans in the United States Richard Rodriguez The Culture
and woman around the boat. While this was happening Clean was operating one of the boats’ guns to ensure their safety. He began taunting their fear and calling them “slopes”. This culminated when the women on the boat moved toward Chef to stop him from looking in a container. Clean opened fired‚ killing everyone on board the boat. Racism‚ as well as irresponsibility and fear as Samuel Hynes would put it‚ is what would allow such an atrocity to happen. Soldier’s were “unused to taking responsibility
Premium Film World War II War
used to label jazz music. Using primarily sources such as "From Somewhere in France" by Charles Delaunay and "An Interview with Wynton Marsalis" by Lolis Eric Elie‚ I argue that although jazz grew out from a distinctive African American tradition‚ the influx of influences in its development throughout the years as well as it’s transcending appeal have made jazz much universal as opposed to American.
Premium Jazz Funk Blues
all was to loom over every aspect of life and make everything more difficult for a colored person no matter how trivially small the matter was. A little over fifty years ago this policy still existed and people of different races were unable to drink from the same water fountain as white people. Now‚ racism still exists except it’s not as obvious as seen in the past. Racism today manifests itself in America’s media outlets‚ schools‚ and technology. The issue is racism. Racism is discrimination directed
Premium Race Racism Race