Abstract In order to experiment with distinct components of a mixture‚ they must be first separated so they can be observed individually. This is accomplished in this lab by the technique called thin layer chromatography (TLC). TLC involves a stationary phase‚ which the TLC plates as well as a mobile phase‚ which could be one of two solvents used: ethanol-acetone for TLC. Dyes in a sample separate consequently because of their unique polarities. As a result‚ nonpolar substances travel further
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1. What physical evidence did you find at the victim’s home? A box of matches‚ a space heater‚ beer bottles‚ Natalie’s wallet‚ a V-shaped burn pattern‚ burned outlet‚ a protected surface on the ground‚ crazed glass‚ and a puddle-shaped burn pattern. 2. Describe the process that you used to take a sample of the puddle-shaped burn pattern on the floor. Why did you also take samples from the portion of the floor that was not burned? First‚ I took the chisel to loosen up some of the wood chips
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Compare the bone markings of the vertebrae and distinguish the differences between the cervical‚ thoracic‚ and lumbar vertebrae. The vertebrae are the irregular bones that create the spinal column. These irregular bones are divided into four sections which are the cervical‚ thoracic‚ lumbar‚ and sacral or pelvic spine sections‚ which are also referred to as curvatures. There are seven vertebrae that make up the cervical spine (neck); twelve vertebrae that make up the thoracic spine (chest); five
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HPLC Theory: System Suitability Parameters High performance liquid chromatography is defined as a separation of mixtures of compounds due to differences in their distribution equilibrium between two phases‚ the stationary phase packed inside columns and the mobile phase‚ delivered through the columns by high pressure pumps. Components whose distribution into the stationary phase is higher‚ are retained longer‚ and get separated from those with lower distribution into the stationary phase. The
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has frequently been used as propaganda‚ promoting the interests of the elite in a controlled manner over their subjects. The images presented‚ the Stele of Hammurabi and the Column of Trajan‚ are monumental examples of such propaganda. The Stele of Hammurabi is over 7 feet tall and was displayed in a public space. Trajan’s column was 38 meters high and displayed publically. It was important for propaganda to be seen by as many people as possible to be successful. More than just eye-catching‚ the monuments
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endotoxin from biopharmaceutical solutions’ 01/09/2009 ‘Ion Chromatography: A New Technique for Clinical Chemistry’ Courtney Anderson Vol. 22‚ No. 9 1976 Biochemistry Jeremy M. Berg‚ John L. Tymoczko‚ Lubert Stryer 2006 ‘Curtin’s industrial biotechnology research’ (http://www.theborneopost.com/2013/02/12/curtins-industrial-biotechnology-research/) (Accessed 27/03/13) Dr Michael K Danquah. 12/02/13 ‘Removing endotoxins using a spin-column format’ (http://www.piercenet.com/previews/2012-articles/removing-endotoxins-spin-columnformat/)
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Determining at what stage fusing is would enable them to discern what an approximate age is. The other area of vertebra that can be examined is the nucleus pulposus. As one ages this area of the vertebra hardens. E. What features of the vertebral column
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injection loop is pulled down to create a high pressure pump that pushes the sample into the mobile phase of the instrument. This mobile phase‚ which for this experiment will consist of water and methanol‚ transports the samples toward the packed column where it will leave the mobile phase and enter the stationary phase. In this stationary phase‚ the sample is fixed in place for the amount of time it takes for the sample to elute back to the mobile phase. This stage identifies and quantifies the
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The vertebral column that houses the spinal cord is made up of many vertebrae which are grouped based on their location. The vertebral groups are divided (in a descending order) into seven cervical vertebrae (neck area)‚ twelve thoracic vertebrae (upper back)‚ five lumbar vertebrae (lower back)‚ sacrum (lower pelvis)‚ and coccyx (terminal end of spine). From the observations of the cervical‚ thoracic‚ and lumbar vertebrae‚ it was found that they all share the same unit structure. They all possessed
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Dear Madame Loisel‚ I received your letter about the issue concerning your friend’s lost necklace. According to your worried note‚ you had gone to a ball and wore your friend Madame Forestier’s expensive diamond necklace and lost it. The clasp had broken and you didn’t realize it had fallen off until you returned home. My advice to you is to contact the people who hosted the ball and have them look around or ask if anyone found a necklace. If you have no luck‚ be completely honest
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