acetophenone in the presence of a basic catalyst. 5 The formation of chalcone by the acid catalyzed condensation of acetophenone and benzaldehyde has been studied [10]. The following mechanism seems to be operating- 6 Importance of chalcones [1]They have close relationship with flavones‚ aurones‚ tetralones and aziridines. [2]Chalcones and their derivatives find application as artificial sweeteners [11‚12]‚ scintillator[13]‚ polymerization catalyst [14]‚ fluorescent whitening agents[15]‚ organic
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determination for hominid status‚ we can determine with certainty that hominids developed as early as 3.59 million years ago. This settled the debate over whether a larger brain or bipedalism developed first (Agnew & Demas). These footprints are close to 1 million years older than the earliest known stone
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sequences‚ thus making sure of target specificity. Once the peptide containing the signal sequence has bound to the respective receptor‚ the peptide is transferred through the lipid bilayer through the translocation channel. For example in case of 1. Endoplasmic reticulum- ER signal sequence is about 16- to 30- residues in length and they are located on the N-terminal of the protein. Two important components in targeting the protein to the ER membrane include signal-recognition particle (SRP) and
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Many people in this generation would label themselves as poor‚ but sometimes the line between each class is misunderstood and blurred due to wants instead of needs. Believe it or not there are different levels that describe the underprivileged. Poverty can be divided into about five diverse subgroups‚ which are transitional‚ marginal‚ residual‚ absolute and relative (Carl‚ Page 30). No matter which description of poverty a person may fall into the effects of this social class can be great. A life
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It is common for a written piece of literature to have a profound effect on one’s way of thinking. By shifting the thought of one person‚ literature can create a ripple effect and spread to others living in the same society. This shift aids in transforming modern society and propelling society to make appropriate modifications. A few pieces of literature that shifts one’s perspectives include The Ones to Walk Away From the Omelas (1991) by Ursula K. Le Guin‚ Salvation (1940) by Langston Hughes‚ and
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The birth and growth of the media age has paved the way for numerous outlets for advertising. Millions of people reading magazines‚ watching TV‚ listening to the radio and surfing the web are constantly bombarded with ads for different products or services. Although the creation of media has given us great power and knowledge‚ we see its consequences in our personal lives and in society as a whole. Advertising has negatively affected society through its use of false claims and manipulation‚ influencing
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C. Reeves‚ M. O’Neal‚ D. Tran Mrs. D English II 3B 1st March 2012 Effects of Culture How much of your life has changed because of the culture you’ve been used to? Think about everything you ’ve 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
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Ancient artifacts and works of art can be seen as some of the most important elements of the past in today’s museums. Some considerations for acquisitions upon an ancient piece must be made. Research and correct installation are just the beginning parts of securing a particular artifact. Preparation of grant proposals and ensuring proper storage are two needed steps in the process of decision. The message that the museum seeks to convey to the audience is quite imperative. It is important that only
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In today’s world‚ where one is expected to conform to the masses‚ maintaining individuality is often difficult. There are some people who simply follow the herd‚ and then there are those certain other people who strive to take the reins and become their own person. The former often succeed in their desire to fit in and become another faceless member of the crowd. The latter‚ however‚ commands society’s respect and ultimately has a better grasp of their identity. The subject of identity and individuality
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During the Spanish Civil War‚ a small Basque village was bombed by German troops. In April of 1937‚ Pablo Picasso paid tribute to the bombing by creating the painting‚ Guernica‚ which showed a horrible scene of corpses and disaster stricken community. In 1985‚ a replication of Guernica was donated to the United Nations headquarters in New York and was “hung outside in the Security Council chamber.” In February of 2003‚ councilmen gathered at the UN in order to hear US Secretary of State Colin Powell
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