* What is this substance This substance is iodide Confidence Report The aim of extraction, is to separate a part of raw material, using a solvent such as water with heat. A tincture of iodine is a common medicine sold in many pharmacies, used as an antiseptic on cuts of the skin. The objective of the seaweed lab, is to produce a tincture of iodine by extracting Iodide and other components (seen when a mixture of iodine is present), from seaweed. We
Examine the table above. Which of ADM’s accruals are “large” relative to the benchmark? Do all of these large changes in accruals seem reasonable given what you know was happening in ADM’s product markets during 2008? The following are the large accruals: receivables, inventories, accounts payable, and accrued liabilities. The large increase in inventories, accounts receivable, and accounts payable seems the most appropriate, considering the prices of soybeans and corn both have significantly increased over the last few years, and also seem to have gone back and forth quite a bit.
CLINICAL PHARMACOLOGY Absorption: Zyloprim is approximately 90% absorbed in the gastrointestinal tract. Peak plasma levels generally occur at 1.5 hours and 4.5 hours for Zyloprim and oxipurinol. Excretion: Approximately 20% of the ingested Zyloprim is excreted in the feces. Because of its rapid oxidation to oxipurinol and a renal clearance rate approximately that of glomerular filtration rate, Zyloprim has a plasma half-life of about 1 to 2 hours. Zyloprim is cleared basically by glomerular filtration.
Riya Singh Banita Sathpathy Period 1 Analysis of a Commercial Bleach Purpose The purpose of this experiment is to determine the amount of sodium hypochlorite in commercial bleach by reacting the bleach with sodium thiosulfate. Procedure In this experiment a solution of sodium thiosulfate of known concentration will be added to the bleach using a buret in a titration procedure. The disappearance of the dark blue color of the starch- iodine complex will signal the end point. Data Trial 1 Trial 2 Trial 3 Initial Reading (ml) 0 0 0 Final Reading (ml) 35.7 36.0 36.6 Volume of Na2S2O3 35.7 ml 36.0 ml 36.6 ml Calculations and Analysis 2 S2O3-2 = I3- = I2 = ClO- Therefore looking at the equation above, we can conclude that for every mole of sodium thiosulfate we need half a mole of sodium hypochlorite. (35.7+36+36.6)/3=36.1 ml is the average volume of the Na2S2O3.
AS substrates are initially added, the activity is higher and then it reaches a plateau with increase. NO. Sucrase activity reached a plateau. Correct Predictions: Optimal temperature: 40 °C (104 °F), Sucrase activity increases with increasing sucrose concentration until a plateau is reached. Incorrect predictions: Sucrase will have highest activity at ph 6 not ph 7 Warm up exercise increases body temperature making it ideal for enzyme activity Increasing myosin activity makes muscles tougher and stiff and limits free movement for performance.
Human Physiology: An Integrated Approach, 6e (Silverthorn) Chapter 2 Molecular Interactions 1) Stanley Miller set out to demonstrate an explanation for the origins of organic molecules using a combination of simple organic molecules, heat and periodic burst of electricity through the mixture, ultimately producing what kind of molecules? A) carbohydrates B) amino acids C) lipids D) glycoproteins E) nucleic acids Answer: B Section Title: Molecules and Bonds Learning Outcome: 2.1 Skill: Level I: Reviewing Facts and Terms (Bloom's Taxonomy: Comprehension) 2) Glycosylated molecules are those formed with which group of organic compounds? A) lipids B) nucleic acids C) proteins D) carbohydrates E) lipoproteins Answer: D Section Title: Molecules and Bonds Learning Outcome: 2.1 Skill: Level I: Reviewing Facts and Terms (Bloom's Taxonomy: Knowledge) 3) Cells regulate their level of activity by regulating the amount of proteins present in the cell at any given time, so an up regulation of enzymes would be expected to A) increase the level of productivity of chemical reactions that rely on them. B) decrease the level of productivity of chemical reactions that rely on them. C) increase the rate of reactions catalyzed by the enzymes.
Alyssa Caparelli Organic Chemistry 12A Professor Alston October 28, 2014 Isolation of Chlorophyll and Carotenoid Pigments from Spinach ------------------------------------------------- Purpose The purpose of this experiment was to isolate ß-carotene, chlorophyll-A, and chlorophyll-B from spinach using column chromatography. Spinach was dehydrated using ethanol, and the pigments were extracted with dichloromethane. The spinach extracts were dried using CaCl2. Then, the solid pigments were run through a column using a non-polar solvent, hexane. The polar absorbent material in the column separated the different pigments by allowing the least polar molecules to travel through the column faster than the more polar molecules.
Acetanilide is also used as an intermediate for the synthesis of rubber accelerators, dyes, and is used as a precursor in penicillin synthesis. The melting point of the base was determined to be between 80-87 degrees. Based on the melting point we identified the identity of our base as Ethy-4-amiobenzoate. Ethy-4-amiobenzoate is an anesthetic which is applied topically to the skin and mucous membrane and is also used to suppress the gag reflex in various
However, when the dead skin from the epidermis occasionally blocks a sebaceous gland of a hair follicle, the bacteria may infect surrounding tissue resulting in inflammation and causing a pimple. 4. a) What is the pH of a substance? • In chemistry, pH (Potential Hydrogen) is a measure of the acidity of an aqueous solution. b) How does the pH describe the acidity of a substance? • It uses a scale to describe the acidity level and the pH scale ranges from 0 to 14.
ABSTRACT Isopropyltoluene isomers were synthesized through the friedel-crafts alkylation of toluene with 2-chloropropane in the presence of aluminum chloride as a catalyst. Through extraction of the distillate with water and 5% NaHCO3, followed by a fractional vacuum distillation, the desired aromatic organic compound was isolated. Infrared Spectroscopy and Gas Chromatography were used to analyze the composition, purity and to confirm the identity of the prepared product. The sample weighed approximately 2.66g, which reflected a low yield at 47%. However, from the GC the area % (also known as percent purity) was 91.8%, which indicates that a very pure product was obtained.