INTRODUCTION Sodium hypochlorite is considered one of the most efficient irrigant in endodontics 1-4. Due to its antimicrobial‚ tissue dissolving properties and low cost‚ it is one of the most widely accepted irrigant in Endodontic practice 5-8. Sodium hypochlorite as a solution is relatively an unstable compound. On exposure to organic compounds‚ heat‚ light‚ air and metals‚ the available chlorine ions reduce and there is subsequent loss of tissue dissolving and antimicrobial properties 9-10. Recent
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Rayon is a manufactured regenerated cellulose fiber. Because it is produced from naturally occurring polymers‚ it is neither a truly synthetic fiber nor a natural fiber; it is a semi-synthetic[1] fiber. Rayon Fiber Characteristics o Highly absorbent o Soft and comfortable o Easy to dye o Drapes well Some Major Rayon Fiber Uses • Apparel: Accessories‚ blouses‚ dresses‚ jackets‚ lingerie‚ linings‚ millinery‚ slacks‚ sportshirts‚ sportswear‚ suits
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different compounds. A compound is a chemical substance that consists of two or more different chemically bonded elements. In this experiment‚ several different compounds are being worked with – potassium iodide‚ lead (II) nitrate‚ acetic acid and sodium bicarbonate. The purpose of this experiment is to determine whether or not a reaction has taken place using qualitative and quantitative analysis. Procedure Part 1 - Qualitative observations of both potassium iodide and lead (II) nitrate were
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Title: The Recipe for the Highest Bouncing Super Ball Name: Date: November 14‚ 2013 Question: How much borax is needed from 1g to 5g to produce a super ball with the highest bounce from the height of 1.5m? Hypothesis: If 2 g of borax is used to make the super ball then it will produce the highest bounce because 2 g will make the appropriate number of bonds without producing a ball that is too soft or too hard to bounce. Materials: Paper cup Beaker Graduated cylinder Stir stick Pencil
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LU 1 - Tutorial 1. Write the formulas for the following compounds: Compound Copper (II) chloride Iron(II) sulphate Sodium sulphate Ammonium nitrate Sodium nitrite Potassium sulphate Magnesium phosphate Formula Compound Lithium acetate Manganese (IV) nitrate Potassium permanganate Iron (III) oxide Potassium sulphite Potassium hydrogen carbonate Sodium iodate Formula 2. Express the following numbers in scientific notation: a) 0.000000027 b) 356 c) 47 764 d) 0.096 3. Express the following numbers
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unlike at the taste. By adding flavorings‚ it can be used by everyone in the family. D. Definition of Terms • Sodium Bicarbonate – Baking Soda • TRPM8 – Transient receptor potential cation channel subfamily M member 8 also known as the cold and menthol receptor 1‚ is a protein. TRPM8 is an ion channel‚ upon activation it allows the entry of Na+ (sodium) and Ca2+(calcium) ions to the cell that leads to depolarization and the generation of an action potential. This eventually
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Prior to begin the experiment‚ preparation for some solutions is required to enhance the lab performance. The solutions needed are standardized potassium bromate‚ standardized sodium thiosulfate‚ and starch indicator. First‚ to prepare a starch indicator‚ pulverize 1g of soluble starch and add 15mL of water to make it as a paste-like substance. Dilute it with about 500mL of boiling water‚ and continue to heat until the mixture becomes clear. Cool it to room temperature and save it into a stoppered
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Water Treatment Mid-Term 1) Total Cell Volume (TCV) is an indirect measure of the: a. Blood Leak b. Contamination of the dialyzer c. Performance of the dialyzer d. Residual chemicals 2) The organization that sets the standards for dialysis water quality is called: a. AAMI b. JCAHO c. KDOQI d. USRDS 3) Total chlorine levels in the water are tested: a. at the end of the day b. at the beginning and the end of the day c. before each patients shift or every four hours
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Ethanol is flammable Sodium hypochlorite is an oxidizing agent and releases toxic fumes (handle in fume hood) Acetic acid is corrosive‚ harmful if inhaled‚ flammable and can cause burns (handle in fume hood) Gloves are recommended to avoid chemical contact with skin Reaction Scheme: Conversion of acetanilide to p-bromoacetanilide Procedure: To a 125 mL Erlenmeyer flask containing a mixture of 95% ethanol (6 mL) and acetic acid (5 mL)‚ dissolve acetanilide (7.4 mmol) and sodium bromide (1.8 g). Place
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Isoamyl Acetate Synthesis through Fischer Reaction Lesaca‚ Anna*‚ Lopez‚ Maria Flor‚ Lu‚ Ricardo‚ Magdurulan‚ Tricia 2Biology6‚ Department of Biology‚ College of Science‚ UST‚ Manila annalesaca@yahoo.com Abstract Esters are a type of functional group that causes distinguishable flavors or odors of some fruits. It can be synthesized by Fischer reaction‚ which is an acid-catalyzed reaction of an alcohol and carboxylic acid. One of the esters known for its characteristic banana flavor is the isoamyl
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