TITLE: Determination of Riboflavin by using UV-Vis spectrophotometry. ABSTRACT: The amount of Riboflavin in various brand of children multivitamins was determine by using UV-Vis spectroscopy instrument‚ the series of standard of riboflavin was prepared in order to determine the amount of the riboflavin in the sample of children multivitamins. The maximum amount of riboflavin was found in the Champs multivitamin that contains 0.1155 mg followed by Chewies 0.1131 mg and Scott’s 0.0672 mg. OBJECTIVES:
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economy‚ bringing thrice the price of traditional hard cider. In the slow‚ or natural‚ process‚ vats of cider are allowed to sit open at room temperature. During a period of several months the fruit juices ferment into alcohol and then oxidize into acetic acid. The French Orleans process is also called the continuous method. Fruit juice is periodically added to small batches of vinegar and stored in wooded barrels. As the fresh juice sours it is skimmed of the top. Both the slow and continuous method
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J Polym Environ (2007) 15:25–33 DOI 10.1007/s10924-006-0042-3 ORIGINAL PAPER Chemical Treatments of Natural Fiber for Use in Natural Fiber-Reinforced Composites: A Review Xue Li Æ Lope G. Tabil Æ Satyanarayan Panigrahi Published online: 4 January 2007 Ó Springer Science+Business Media‚ LLC 2006 Abstract Studies on the use of natural fibers as replacement to man-made fiber in fiber-reinforced composites have increased and opened up further industrial possibilities. Natural fibers have
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manufactured globally each year. It main application is the bottling industry where approximately 14.7 Mt in 2009. PET resin is produced conventionally in a two - step process displayed in figure 1.9. The first stage is the esterification of Terephthalic acid (PTA) with Ethylene glycol (EG) carried out in a succession of polymerisation reactors conventionally stirred tank batch reactors and using antimony (III) oxide catalyst. The solid PTA is mixed with an ethylene glycol. The paste formed is then fed
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Experimental Procedure and Interpretation of Data Collection and Preparation of Materials The bark of Santol (Sandoricum koetjape (Burm.f.) merr.) were collected at the researchers backyard on Rosales‚ Province of Pangasinan. The collection was done in the month of August to September 1999. The bark was collected through the used of a knife. The bark were dried under the sun. And were placed into container and tightly closed ready for expression. Preliminary Test for the Determination of Plant
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Date: April 23‚ 2012 Subject: Preparation of Synthetic Banana oil Summary: Banana Oil is a major flavoring in many different mixtures from candles to different types of food. The major organic chemical that is banana oil is ester‚ which is what gives it its strong odor. In this scenario‚ the banana oil supply is running low for Cavendish Distilling Company. So they want to formulate a synthetic version of banana oil to replenish their supply. Problem: Will the synthetic version of banana oil
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The Formation Of Esters Aim: To observe the reactions between ethanoic acid and different alcohols in the preparation of a variety of esters. Apparatus: • Bottles containing: glacial Ethanoic acid‚ Methanol‚ Ethanol‚ Propan-1-ol‚ • Propan-2-ol‚ Butan-1-ol‚ Butan-2-ol and Conc. Sulfuric acid. • 1g Salicylic acid • 10 ml Measuring cylinder • Test tubes • 250ml Beaker • One-hole rubber stopper • 50cm length of glass tubing to fit stopper • Hotplate • Safety glasses Method: 1. Set up a 250ml beaker
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- | - | - | - | 50 | Fmoc-Gly-Phe-OMe‚ C27H26N2O5 | 0.46 | 458.52 | 0.001 | - | - | 1 M ethanolic sodium hydroxide | - | - | - | - | 5 | Acetic acid | 0.52 | 60.05 | 0.009 | 1.049 | 0.5 | Table of hazard assessment : Thionyl chloride‚ SOCl2 | * Reacts violently with water * Harmful by inhalation and if swallowed * Contacts with water liberates
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Purpose of the Experiment: The intention of the experiment is to use solvent extraction methods to separate a mixture containing a carboxylic acid and a neutral compound. Once recovered‚ the solids were purified by recrystallization and examined by thin-layer chromatography‚ and their identities were derived by melting point and infrared (IR) spectroscopy. Extraction is a procedure that selectively dissolves one or more of the mixture compounds into a proper solvent. Extraction refers to
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Godly aspect Psalm 63: Prayer is the breath of our relationship of God. The absence of prayer shows that we are spiritually dead. I don’t mean just saying prayers that are not spawned from the heart‚ of course. Jesus said empty prayers amounted to only religious ceremony. One can dress up a dead body but there sure is a difference between that corpse and a living person even if he is sick. What do you think of when prayer is mentioned? This is a good question. Your answers reveal a lot about your
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