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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wire stirrer ring stand unknown solid 15x150mm test tube clamp watch acetone Ice cyclohexane sodium chloride Lab Safety: Wear protective googles‚ apron‚ and gloves. Procedures: Prepare ice/salt/water bath Place 50g of solid NaCl in a 400mL beaker and add just enough water to dissolve the salt. Fill an 800mL beaker 2/3 full of ice‚ and then pour salt water mixture into the beaker‚ stir. In the hood‚ into two nested test tubes‚ add 10 mL of cyclohexane from a buret. Record initial
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Neurulation and the Formation of Axial Structures Neurulation The stage of organogenesis in vertebrate embryos‚ during which the neural tube is transformed into the primitive structures that will later develop into the central nervous system. In development‚ this starts with the first traces of formation of the neural plate and ends with closure of the neural tube. Induction Process by which the presence of one tissue influences the development of another. Some considerations: Absence of inducing
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leaves were washed with tap water and cleaned thoroughly with a clean cloth. The leaves were immediately pound by the use of a mortar and pestle. The material was filtered through a clean Muslim cloth and the leaf extract was stored in clean test tubes‚ with the same size and having the same amount of extract and stored in a refrigerator to preserved it’s freshness. ANTI-FUNGAL BIOASSAY There were four set- ups during the experiment. Each of those set up were labeled as set up A‚B‚C and
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1x Test Tube Rack • 2x Test tubes • 1x Delivery tube (U bend) with rubber stopper • Lime water • 1M HCI • 2 Large marble chips • 4-5 Small marble chips • 1x Stopwatch • 1x Black card with blue tack Method: Step 1- Arrange test tubes and delivery tube. Step 2- Arrange black cardboard behind the rack (this is to provide a contrast to the reaction) Step 3- Fill the unstoppered test tube with lime water‚ making sure to fully cover the end of the delivery tube. Step
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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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According to Prado and Dewey (2014)‚ “Adequate nutrition is necessary from the beginning‚ with the formation of the neural plate and neural tube affected by nutrients such as folic acid‚ copper‚ and vitamin A.” If the neural plate and neural tube do not develop properly‚ brain injuries could result since the brain and spinal cord develop from the neural tube. The environment has an effect on the infant also. The way the body strengthens its senses is through practice or experience. One process
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The aseptically inoculate nutrient broth tubes A and B did not have any microbes inoculated into the tubes so it should not have been cloudy and that was what was seen. Tube C should have been cloudy because it had E. coli inoculated into the nutrient broth and that was also seen. A simple streak was also performed and it looks has if the loop went over previous streaks which should not have been done. A complex streak was also done. No colonies grew towards the end of the streak‚ this could be due
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COMPOSITES COURSEWORK DESIGN AND ANALYSIS OF A LAMINATED COMPOSITE TUBE ABSTRACT This report details the process for the design of a composite laminate tube‚ the software package ’MathCAD’ was used to determine a lamina design with a configuration that avoids mechanical failure under loading conditions. It was also used to obtain twist angles and maximum stresses for specific lamina wind up angles. The report will provide analysis of the methods used to obtain these criteria. AIM Use a Mathcad
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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 graph
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