necessary for starch formation. Materials: * 600mL beaker * Access to water * Safety glasses * Bunsen burner * Tripod * Gauze mat * A large white evaporating dish * Scissors and forceps | * Glass stirring rod * Test tube rack * Test-tube (30mm x 180mm) * Methylated spirits * Iodine solution * 100mL beaker * Soft green leaves * Rubber gloves | Risk Assessment: Risk | Prevention | Iodine Solution stains skin and clothesIt’s harmful with contact with eye
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sample of Gatorade. Materials: FD&C Blue 1 stock solution‚ 50-mL Sample of consumer sports drink‚ 10-mL Water‚ distilled or deionized Beakers‚ 50-mL‚ 2-3 Cuvets or test tubes‚ 13 x 100 mm‚ 3-8 Kimwipes or lens tissues Pipet‚ serological‚ 10-mL Pipet bulb or pipet filler Spectrophotometer or colorimeter Test tube rack Procedure: 1) Turn the spectrophotometer on allow to warm up for 15-20 minutes. 2) Based on maximum absorbance of the dye tested‚ select the appropriate wavelength
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experiment: 20-second intervals for each reaction Apparatus: Gas syringe Metal stand Yeast Catalase Hydrogen Peroxide – Concentrates (%) at (2.5‚ 5.0‚ 7.5‚ 12.5 and 15.0) Boiling tube Connecter tube Beaker Small needle syringe (1cm3) Stop watch Medium syringe for yeast (10cm3) Test tube rack Tap water Variables
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causes the jelly solution to solidify and set after cooling.” Task: Propose a hypothesis to explain Mary’s observation‚ i.e. jelly fails to set with the addition of fresh pineapple and kiwifruit. How would you design and carry out an investigation to test your hypothesis? Write a full report for your investigation The following sections should be included in your report where applicable: • • Aim of your investigation Introduction to your investigation report‚ which should include: > Problem to investigate
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tape NA powder PDA powder Pentel pen Stirring rod Casserole Electric stove Pressure cooker/ autoclave Steps in Preparation of Culture Media: 1. Calculate the total amount of media needed for the experiment (15ml for plates‚ 5-7 mL for tubes). 2. Weigh the required amount of powder needed to dissolve in distilled water (based on the manufacturers specification in the container). 3. Dissolve the powder using the stirring rod‚ cover‚ cotton stopper and label. 4. Place in water
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How does light intensity affect the rate of photosynthesis? Poorly Pondweed Questions 1) How does light intensity affect the rate of photosynthesis? 2) How does temperature affect the rate of photosynthesis? sunlight carbon dioxide + water glucose + oxygen chlorophyll sunlight 6CO2 + 6H2O àààààà C6H12O6 + 602 chlorophyll Prediction I predict that the more intense the light‚ the higher the rate of photosynthesis. To photosynthesise‚ plants need light. It provides the energy for the process
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Practical 1 - Investigation into size and scale of microscopic tissues This practical focuses on microscope technique and using graticules and stage micrometers to determine size and scale in biological cells and tissues. Intended learning outcomes By the end of this practical you should be able to: • Use a microscope fitted with an eyepiece graticule and stage micrometer • Calibrate the eyepiece graticule using the stage micrometer • Use the calibrated graticule to determine the actual
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were mixed and shaked in a 4-inch test tube. The mixture was centrifuged‚ and the supernate was decantated into a test tube. Separate drops of the supernate was tested for presence of Fe2+‚ Ag+ and Fe 3+ in three different test tubes: Ions Test Reagent Observation Fe2+ 0.10M K3Fe(CN)6 Prussian blue precipitate Fe 3+ 0.10 M KSCN Blood red solution Ag+ 1.00 M HCl White precipitate Copper (II) – Ammonia System 1.00 M NH3 was added dropwise to a test tube filled with 1ml of 0.1 M CuSO4. Contents
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Discovering the Mystery of Eleven Test Tubes Karen Radakovich Ph.D. Mohammad Farhad Brittany Cina CH 223‚ Spring 08 Abstract: Eleven mystery test tubes labeled from K-1 to K-11 contained: 6M H2SO4‚ 6M NH3‚ 6M HCl‚ 6M NaOH‚ 1M NaCl‚ 1M Fe(NO3)3‚ 1M NiSO4‚ 1M AgNO3‚ 1M KSCN‚ 1M Ba(NO3)2‚ 1M Cu(NO3)2 respectively. The contents of the test tubes were determined by chemical experiments. Solution K-1 contained NiSO4 because when solution K-9‚ ammonia which was identified by its pungent odor
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washed following cutting until not more colour appeared in the wash water. Materials 1. Washed cylinders of beetroot (1 cm in diameter‚ 4 cm long) in distilled water 2. 3 x test tubes 3. 1 x test tube containing distilled water‚ cyclohexane and a cylinder of beetroot‚ labelled TT4. 4. Test tube rack 5. A bottle containing 8 ml distilled water 6. A bottle containing 8 ml 50% acetone 7. A bottle containing 8 ml 100% acetone 8. Permanent marker pen 9. 1x sheet
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