Synthesis of Aspirin (Acetylsalicylic Acid) Abstract: This experiment is about the synthesis of aspirin under laboratory conditions. Aspirin is prepared by reacting salicylic acid and acetic anhydride; in the presence of sulfuric acid. After fully dissolving the salicylic acid with acetic anhydride‚ the solution is cooled and cold water is then added. Once the crystals form they are then filtered and left to dry out. There mass is measured and recorded then the yield is calculated. Introduction:
Premium Aspirin Salicylic acid Acetic acid
YOUR NOTES UNIT 2 NOTES DNA (deoxyribonucleic acid) DNA Functions • Stores genetic information and copies itself (replication) to pass on the information • Contains genes (instructions to make proteins) • Instructs cell’s activities DNA Structure • DNA is a polymer of nucleotides • Chromosomes (DNA strand + associated proteins ie. Histones wrap DNA around like a spool = condensed chromatin) ↓ genes (sections of a chromosome that codes for a protein) ↓ nucleotides (3 parts:
Free DNA
(Source F). Roberts also goes on to affirm‚ “... in the United States‚ 80 percent of us live in large‚ densely populated urban areas… typically hundreds of miles‚ often thousands of miles‚ from the major sources of production” (Source F). Modern society has moved away from rural areas to urban cities far from the production of food. These choices make it increasingly difficult for some to take part in this movement. Dueling choices have become a major roadblock for many who strive to take part‚ and
Premium Food Nutrition Sustainable agriculture
shall the United States do to prepare for the possibility of a biological attack? In order for the United States to be prepared for a terrorists attack with biological usage‚ they shall take the necessary precautions in order to protect their country from a possible microorganism battle. By taking exclusive precautions such as testing the effects of certain bacteria‚ the United States can be well prepared and possible prevent a biological warfare. When observing the usage of biological weapons used
Free Biological warfare World War II
is essential for monitoring and maintaining a relatively constant level of glucose in the bloodstream‚ hence the liver is involved in glycogen breakdown and synthesis because these pathways allow the liver to remove glucose from the bloodstream for glycogen synthesis when blood glucose is high and to release glucose into the bloodstream from glycogen breakdown when blood glucose levels are too low. Glycogen provides an additional source of glucose besides that produced through gluconeogenesis which
Premium Glycogen Glucose Metabolism
Experiment # 3 Acetylsalicylic Acid Introduction: The purpose of this experiment is to create and isolate pure acetylsalicylic acid from the substances salicylic acid and acetic anhydride. Then one will find the melting point to determine purity. Procedure: Make a hot bath. Weigh some salicylic acid and place in conical vial. Add .480mL of acetic anhydride and a drop of concentrated phosphoric acid. Drop in a magnetic spin vane and attach air condenser to vial. Partially submerge it in
Free Aspirin Carboxylic acid Acetic anhydride
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 Fever 103 (1963) by Sylvia Plath. Literature prompts one to think about the piece they are reading. Ursula K. Le Guin’s The Ones to Walk Away From the Omelas (1991) invokes the reader to dissect the piece and unearth exactly what Le Guin is attempting
Premium Literature Writing Sociology
defining and tracing human nature through evolution and present times. Evolutionary studies address the description of human descent from primates. These studies seek to outline the sequence of changes and mechanisms of action that make up the evolution of humans from primates. The general theory of evolution is used to reconstruct history with facts and evidence from fossils and other remains. Endocrinology is the study of how hormones affect human anatomy and physiology‚ behavior‚ and cognition
Premium Scientific method Biology Psychology
helping the USPS keep up with all the new technology is to increase services and give their customers more options. People are choosing other ways because postal services aren’t as efficient as the internet. According to Source A‚ they are dropping from six- to five-day delivery. With the lack of faith in their services and drop in delivery days‚ the number of customers will probably decrease due to the slow services. The USPS should be providing a seven-day delivery service so their customers can
Premium United States Postal Service
can. It was important to place the metal chimney around the candle so that minimal amounts of heat would escape; having too much heat lost to the atmosphere would cause extra error in the calculations. The assumption made was that all heat released from the candle was absorbed by the water‚ and that none of the heat was lost to the air or absorbed by the can. The small holes at the bottom of the chimney allowed some oxygen to reach the flame‚ since oxygen was required to fuel the reaction. During
Premium Oxygen Carbon dioxide Water