In HEPES buffer at pH 7.0‚ the CA-2Pb2+ formation resulted in a distinct color change from red to blue‚ accompanied by a remarkable bathochromic shift from 527 nm with a shoulder at 558 nm to 605 nm in the absorption spectrum [28]. Since there have been some reports on the complex formation between Cys and Pb2+ in an aqueous solution [30‚ 31]‚ the sensing selectivity of CA-2Pb2+ toward Cys was investigated by absorption spectroscopy. The color changes and absorption spectral study of CA-2Pb2+ (50
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II. Synthesis This activity helps me to understand myself better by knowing what people think of me. It aims to foster self-awareness and self-improvement. I found out that my family thinks that I am a responsible person in terms of sense of responsibility. But my brother thinks I’m immature. In terms of duties at home‚ my mother and father understand that I don’t perform my duties because I’m busy with my studies. My sister thinks it too but she justified that I perform when I’m not busy. When
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Synthesis The idea of gender wage discrimination being widely practiced in the United States today is a difficult concept for many to swallow. With the Equal Pay Act of 1963 and Title VII of the Civil Rights Act of 1964‚ the realization of the existence of the gender wage gap surprises many Americans. These authors bring to the forefront the idea that there is more to the gender wage gap then just companies discriminating against women and minorities. They sight many sources with defined data
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the Twenty-first Century” took a different approach by targeting not everyone but only few saying‚ “…not merely the heights to which some will climb or the difficulties others will endure.” When combining these two statements you can see how they synthesis; In other words‚ the lower class of America will either suffer from being under skilled or replaced by technology‚ while the successful class of America will become known as “The Untouchables”‚ meaning they will be so specialized that they will not
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Synthesis of Aspirin Learning Goals 1. To synthesize aspirin from salicylic acid and acetic anhydride. 2. To purify the crude product by Recrystallization. Introduction Most drugs are chemical compounds which are described as "organic compounds" because they are comprised primarily of the elements carbon‚ hydrogen and oxygen. The present experiment will be the synthesis of a familiar organic compound called aspirin. The common chemical name is acetylsalicylic acid. Aspirin‚ the
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2.4.General procedure for the synthesis of 2‚3-dihydriquinazolin-4(1H) ones derivatives: A stirred mixture of isatoic anhydride (1 mmol)‚ amines containing 2-aminobenzothiazole or 2-amino benzimidazole (1.1mmol)‚ aromatic aldehydes (1 mmol) and 0.045 g of H-ZSM-5 nanozeolite was reacted in an oil bath at 100 oC for the appropriated times. Completion of the reaction was indicated by TLC. After completion of reaction‚ the mixture was cooled to room temperature. The solid residue was dissolved in hot
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Synthesis “The kingdom of heaven is within the mind of a person‚ not within the collective mindlessness of a crowd.” In the articles‚ “The Only True God and Jesus Christ Whom He Hath Sent”‚ by Jeffery R. Holland and “Propaganda under a dictatorship”‚ by Aldous Huxley are two totally different topics. This paper will be a breaking down of the two articles and finding the similarities between the two of them. It will be interesting‚ but nothing is impossible. The two topics are Hitler wanting so
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EXERCISE 11 SYNTHESIS OF ASPIRIN MARAVILLA‚ Ana Mikaela B Group 4 CHEM 40.1 1L Date performed: September 30‚ 2013 Date submitted: October 7‚ 2013 VI. RESULTS AND DISCUSSION Aspirin is prepared by the esterification of salicylic acid with acetic anhydride under acidic conditions. The phenol group in salicylic acid is replaced by a carboxyl group through electrophilic substitution. The mechanism for the reaction can be summarized
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Summary of Presentation: Fe2+/H2O- mediated synthesis of Melanins: Cases of Homogentisic acid‚ serotonin‚ and norepinephrine The powerpoint presentation that I attended was titled‚ “Fe2+/H2O- mediated synthesis of Melanins: Cases of Homogentisic acid‚ serotonin‚ and norepinephrine‚” the research covered melanin which is a dark pigmentation that can cause other complication and pathological conditions such as‚ vitiligo and ochronosis. It is believed that melanin protects from ultraviolet light rays
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The goals of this experiment are to determine if the products derived from amide synthesis and Williamson Ether Synthesis are identical‚ and if one of the synthetic routes is more advantageous than the other. In Part 1‚ an attempt to synthesize acteophenetidin crystals by amide synthesis was made. We began by removing the colored impurities from the p-Phenetidine (reddish-brown) by placing 2g of the sample in 38 mL of hydrochloric acid and heating the solution to boiling point. Upon reaching just
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