39. The Viscosity of Liquids After studying the present lecture‚ you will be able to Define viscosity and viscosity coefficient Outline the method to measure viscosity using Ostwald viscometer Determine the average molecular weight of a polymer Determine the surface concentration of 1-butanol in aqueous solution Measure the distribution coefficient of a solute betweenn two solvents 39.1 Introduction Viscosity‚ one of the transport properties‚ arises because of intermolecular attractive and
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Majed Al Dhwaihi Chem 151 Lab Prelab Assignment for week 3 Chemical Separation Procedure: Separating the sample: First place a small amount of the spinach provided in the mortar‚ just enough to cover its bottom; combined with the sand provided to break down the call walls. A 1:1 mixture of hexane and acetone was determined to best solvent for this extraction. Knowing this add one mL of the pure hexane and one mL of the pure acetone to the mortar. Grind the contents until the cell walls
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Placing fruit in a bag will help hasten the ripening for only a few fruits. Most fruits will not ripen (ever) once they have been picked. The only fruits that ripen once they’re picked are bananas‚ avocados‚ pears‚ mango‚ and kiwifruit. Ripeness in fruits is based on sugar content‚ not color‚ thus most tomatoes in grocery stores have no flavor because they were picked green and exposed to ethylene gas to induce color change. Tomatoes are what are known as a "climacteric fruit" which means they’ll
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Faculty of Science and Mathematics Universiti Pendidikan Sultan Idris LABORATORY REPORT SBF1013: GENERAL PHYSIOLOGY Semester 1 Session 2012/2013 LABORATORY 7b: Photosynthesis (Starch production during photosynthesis) PREPARED BY: EVA KHO JIUN TYNG E20111002619 YII YUANN CHI E20111002618 LIM SHIU MAN E20111002628 GAYTHIRI A/P SEENEE E20111002635 LAAVANYA A/P NYANASAIGRAN E20111002578 KAVITHIRAKASWIN A/P KUMARCHELVAN E20111002632 BAAVITHRA A/P GOPAL KISHNAM E20111002590
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(Author’s name) (Professor’s name) (Course details) (Date Abstract The aim of the lab was to separate and analyse analgesic drugs in a drug tablet. The method used to separate the components was Thin Layer Chromatography (TLC) with silica adsorbent as the stationary phase and 0.5% glacial acetic as the mobile phase. In one plate‚ five known samples were used as the reference‚ that is: Aspirin; Caffeine; Ibuprofen; and Salicylamide. Aspirin and Salicylamide were the only samples that fluoresced
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Gelatin Abstract: For this inquiry lab‚ the research team tested the gelatin solution for the presence of biomolecules. The team searched for the presence of starch‚ glucose‚ lipids‚ and proteins through the use of indicators: Sudan III‚ Lugol’s iodine‚ Benedict’s solution‚ and Biuret’s reagent. After testing the gelatin solution in the presence of the indicators‚ the results showed that Lugol’s reacted‚ turning orange-pink (oils) and the Biuret reagent (protein) reacted with the gelatin solution
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in the neck as represented by the image below left. The causes of chronic hypothyroidism are fairly distinct. Around the world in third-world and developing countries‚ iodine deficiency is the most common cause of hypothyroidism. This used to be true as well for developed countries‚ but today this is a less common cause as iodine usually finds its way into our diets without too much trouble. In modern-day developed countries‚ hypothyroidism is mainly a result of Hashimoto’s thyroiditis‚ a birth defect
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it may also be due to the invasion of the thyroid gland by the leukocytes‚ mainly the T-lymphocytes. It’s important to note that in patients who have this disease‚ iodine deficiency can still pose a real concern to healthy functioning of the thyroid gland. The world health organization says that the maximum tolerable intake for iodine is 1100mcg per day for pregnant women. DIAGNOSIS: • Hashimoto’s disease is diagnosed by detecting the elevated levels of anti-thyroid peroxidase antibodies in the
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Western Governors University EBT1 Task 3 A1. When a patient is getting ready for surgery‚ one of the last things on their mind is infection. As medical personnel though‚ it is a thought that definitely does not leave the mind. Getting an infection after surgery not only increases a patients hospital stay and recovery time‚ but also increases expenses for the hospital. When thinking of ways to decrease infection‚ it most often starts with preparation of the surgical site and insertion of
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5.2 Carbohydrate Test 1. Obtain five test tubes. Label each one 2. Use a graduated cylinder to transfer 5 mL of distilled water 3. Repeat step 2 with each of the food substances. 4. Add 5 drops of Iodine to each test tube. 5. Gently shake the contents of each test tube. 6. Iodine causes complex carbohydrates to turn dark blue or black Table 5.2 Lugol’s Test | Results: Positive results
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