Retention time for caffeine : 4.149+4.142+4.152+4.1454 = 4.15 2. What is the retention time for benzoic acid? Retention time for caffeine : 2.651+2.817+2.857+2.9274 = 2.81 3. How are the retention times for caffeine and benzoic acid related to their chemical structure and the nature of the chromatographic system? The retention time of caffeine and benzoic are related due to the presence of a hydroxyl group. The hydroxyl
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Introduction The purpose of this study was to conduct observations‚ using two different methods‚ on children‚ between the ages of 4-5‚ to understand their emotional behaviors in a social and learning environment as well as determining which method of observation was more reliable. There are different methods of conducting observations‚ but two main ones include naturalistic observation and experimental observation. A naturalistic observation method is when a researcher studies a person or group in
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Macroeconomics Gleb Sazenkov (ADE AR) Chapter 6 1. Using the information in this chapter‚ label each of the following statements true‚ false or uncertain. Explain briefly. a. The national income identity implies that budget deficits cause trade deficits. False. Actually‚ if we look at the formula of our Y we can see that we don’t have anything there that could tell us that budget deficit can cause a trade deficit. Y = C + I + G + (X-IM/e) If we have a budget deficit‚ so our NX will be affected
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1. Go to a public place and OBSERVE the community of people in that place for at least 30 minutes; perhaps as long as 60 minutes. In your report‚ describe the setting and note the date and time of your observation. Describe the element of “community” that you observed. This past Saturday‚ at 10:00 in the morning‚ my seventh grade son had a basketball game. It was an away game and in attendance was average amount of people there for such an early game. It was fairly cold out that morning‚ as
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Observation of Child at Play Time: 6:04-6:38 Location: School field/Playground Child: Abigail‚ 72 months‚ girl Description: light red hair and freckles all over her face‚ very outgoing‚ talkative‚ and youngest out of two girls‚ loves to socialize‚ in the 1st grade. Observation: I walked up to the park where Abigail and her team were practicing. She was laying on the grass picking up a flower. She walks over to her dad and gives it to him. The whistle blows and she gets up and runs to the practice
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References: Chapin‚ June (2013) Elementary Social Studies: A Practical Guide Eighth Edition (p. 31) Gardner‚ Howard‚ ASCD Curriculum Update (June 1992) Retrieved April 6‚ 2013 from www.eedstate.ak.us/tlsframeworks/sstudies/part3a5.htm www.socialstudies.org/postions/powerfulandpurposeful https://lc-ugradl.gcu.edu/learningPlatform/user/users.html?token=TPC%2B5T2b13WHUD
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about yourself. Question of value b. To persuade my audience that violence in video games is a major cause of violent behavior among teenagers. -Question of fact -To persuade my audience that violent video games should be banned to certain aged children. c. To persuade my audience that a national sales tax should be adopted to help pay off the national debt -Question of policy -To persuade my audience that a national sales tax will pay off the national debt. d. To persuade my audience
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October 20‚ 2012 ECE 220 Child Observation # 3 Observation Date 10/8/2012 Jonathan‚ Brielle and Sebastian are playing in the block area. Working together they stack 3 rows of blocks on top of each other‚ going horizontally. After stacking the blocks‚ Jonathan points to each block (individually) and counts them. Jonathan counts to 20‚ the other children joins in the counting. After reaching 20‚ Jonathan kicks the row of blocks and they blocks fall to the floor. Brielle and Sebastian
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Rob had no other children and had never been married. Kim and Rob married about a year after Ava was born‚ and divorced about a year later. Since a very young age‚ Ava has spent her time moving between her parents’ and grandparents’ houses‚ like many children of divorced parents. Kim has problems with alcohol consumption‚ and has in the past struggled with an eating disorder. She has little patience for raising an elementary schooler‚ especially now that her other two children have moved out. Kim
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compare with your prediction? The threshold doesn’t change because after the voltage was simulated the cardiac muscle cells Ca channels opened. You cannot open them anymore or reopen them before depolarization. This is due to the refractory period. 3) Why is it only possible to induce an extrasystole during relaxation? Because cardiac muscle is able to depolarize after repolarization takes place. 4) Explain why wave summation and tetanus are not possible in cardiac muscle tissue. How well did
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