Extraction of Caffeine from Tea Leaves Introduction Caffeine is soluble in boiling water and as a result it is easily extracted from tea bags by steeping in hot water. This process leaves behind the water insoluble portions of the tea bag. However‚ water extracts more than just caffeine‚ so a final separation is done with an organic solvent that will dissolve primarily caffeine. The organic solvent used in this experiment is Dichloromethane (CH₂Cl₂). Dichloromethane is less polar than water
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Subject:Experiment # 2: Extraction and Evaporation. Separating the Components of “Panacetin” Introduction: The problem proposed in the experiment is an unknown ingredient found in generic Panacetin tablets that must be discovered. Panacetin tablets are known to contain aspirin‚ acetaminophen‚ and sucrose; therefore‚ the tablets tested‚ containing aspirin and sucrose‚ are thought to contain an unknown of something similar to that of acetaminophen such as acetanilide or phenacetin. Another problem
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Activity 1.3.2: Student Response Sheet Scenario 1 A 32 year old immigrant from a patriarchal country is giving birth. As she is delivering the baby‚ she tearfully confesses to her doctor that this is her 4th child and she simply cannot handle any more children. She tells the doctor that her husband refuses to use contraception or allow her to‚ and she begs her doctor to tie her tubes and not tell her husband. The doctor complies. Was HIPAA Violated? Why or why not? ________________________
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Something new was also used in this case‚ dog DNA. During the investigation‚ police learned that Taylor had been walking his dog around the time Leanne’s body was placed in the woods. Forensic examiners found dog hairs on Leanne’s body. The dog hair DNA sample was sent to a university in Texas. It produced a partial profile for a dog. However‚ this was not able to be used against John Taylor because he had killed this dog before the evidence was found. The dog had been buried‚ in Taylor’s back garden
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Employee Orientation Programs Annette Andrade Capella University - Bus4047 I. Purpose Statement DNA believes that it is important for all new employees to have an understanding of the organization in which they work‚ the policies and procedures applicable to them and the benefits that they earn. DNA not only want to have an impact in the new hire but also the organization as a whole. II. Elements of the Employee Orientation Program a. Welcome Speech – this is a 3 to
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Gene Cloning Methodology of DNA What is DNA? DNA was discovered by the Swiss biochemist‚ Johann Friedrich Miescher‚ in 1869‚ while he was working in Tubingen‚ Germany. He found that the DNA molecule is large; acidic in nature and rich in phosphorus‚ but only in the 1930s was the real and complex structure of DNA fully studied. DNA (deoxyribonucleic acid) is the genetic material in all prokaryotes and eukaryotes‚ i.e. it is the material responsible for the transfer of hereditary traits from
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Tools and techniques for DNA manipulation Gene technology is the artificial manipulation of genes Gene technology’s use different techniques: TOOLS: Restriction enzyme Enzyme that are used to cut DNA at specific sequences ‘Like a pair of scissors’ One of the most important tools in genetic engineering They have the ability to cut DNA molecules at precise sequences of 4 to 8 base pairs called recognition sites A lot of bacteria are used to get restriction enzymes Bacteria use restriction
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Over the last three decades the importance of DNA in the dispensing of just has been on a constant rise. Deoxyribonucleic acid‚ most commonly known as DNA‚ is a molecule found in every living organism. DNA is responsible for storing an individual’s genes. As an investigative tool DNA is a very useful tool as it can be used to identify persons of interest relevant to particular crime scenes (McEwen‚ T. 2011). DNA alone is not able to help identify how someone looks or their characteristics; however
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and analyzed various DNA fragments in order to determine if these DNA fragments originated from the same individual. The learning objective for this lab is to gain a better understanding of how DNA fingerprinting works. In this lab the primary function is to determine which DNA fragments match the DNA fragment found on the crime scene. To determine if any of the DNA fragments match the fragment found at the crime scene‚ the DNA fragments must undergo the DNA fingerprinting. DNA fingerprinting causes
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net/criminology/essays/criminal-dna-databases-are-not-just-for-felons-anymore-criminology-essay.php en.wikipedia.org/wiki/DNA_profiling http://academic.udayton.edu/health/05bioethics/00rooker.htm http://www.dnasaves.org/dna_law.php http://www.pbs.org/wgbh/pages/frontline/shows/case/revolution/databases.html http://www.innocenceproject.org/news/Blog-Search.php?category=3&check=true&tag=&term=felon&x=1&y=1 http://www.thenewatlantis.com/publications/liberty-privacy-and-dna-databases http://oldsite
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