Chromatography lab Purpose: To separate food colorings into their component dyes using paper chromatography. Materials: Chromatography paper‚ Food coloring‚ Ruler‚ Pencil‚ Solvent solution‚ Test tubes‚ Test tube rack. Safety precaution: wear aprons‚ to make sure that you don’t get any of the alcohol on your clothes‚ and if you break a test tube you don’t get glass on you. Procedure: See-attached handout. Results: See chromatography with Audrey’s lab report.
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root tip of a plant spend a comparatively long time in the mitotic phase‚ whereas those cells comprising slow-growing tissues would spend most of their lives in interphase. Non-dividing cells remain in interphase and never enter the mitotic phase. (Lab Manual 64) Interphase is the synthesis of biological molecules including DNA and duplicated DNA with associated proteins. These comprise the chromatin that begin to condense toward the end of this phase‚ but are not yet visible. The nucleoplasm
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Lalin Candium Lab Report Chemistry Block H Mr. Neil Chipman Calculating the Atomic Mass for Different Candium Isotopes Objective: In this experiment I will be discovering the atomic weight of Candium isotopes. By doing this experiment‚ it helps us to know how to calculate the relative abundance and atomic mass of each Candium isotopes without having to use the spectrometer. This lab will achieve my understanding of isotopes and why it has different masses but same number of protons due
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Life Science Lab. A. Arnold Tuesdays @ 2:30 September 30th‚ 2011 Lab Report: Nuclear and Cell Division. PART A: Stages of Mitosis in my own words. 1. Interphase: DNA has formed already‚ but it remains in the simple form of chromatin. Chromatins are structures that are loosely coiled in the cell.3 I also observed during my lab that this was the only stage where I could still see a nucleus and nucleolus intact within the cell; this is because it’s the only stage where the nuclear membrane has
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dioxide and water are used to make carbohydrates by using light energy in green plants. The objective of this experiment is to measure the rate of photosynthesis Hypothesis: The petri dish that is exposed to the most light and with the NaHCO3 solution will have the best results and the petri dish that is kept in the dark will have the poorest results. Material and Methods: 1. Get 4 deep petri dishes and label them 1‚ 2‚ 3‚ and 4. Fill dish 1 about 2/3 full with distilled water. Fill the other
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acetanilide. In the next lab‚ percent recovered was obtained through weighing the acetanilide sample as well as comparing its melting point range. In this experiment‚ the sample‚ acetanilide was weighted to be 1.523 grams. The sample appeared to be a pale mixture of brown flakes before it was crushed into small flakes. When boiling the sample with 25 mL of water over the 75 mL of water steam bath‚ the sample started to change to dark drown flakes in some areas. When the water began to evaporate in
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Results: Since the mass of the ball bearing used in this experiment was very light‚ 20 balls were measured and the result was divided by 20 for better accuracy. This procedure was repeated for the sizes and the results are as follows: Diameter (mm) Mass (kg) 2 0.04 3 0.075 4 0.11 To find out the densities of the three balls‚ the following formula was used: Density= (mass of the ball)/(Volume of the ball)= mass/(4/3 π r^3 ) Density of 2mm ball = (0.04⁄1000)/(4/3 π 〖(0.001)〗^3
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level because the exact 100ml of 0.4M CuSO4 is prepared for the experiment but during the practical the water level was increase than the 100ml mark in volumetric flask. So‚ it makes error in the concentration of CuSO4 primary solution. CuSO4 has ability to absorb water molecules from environment therefore when calculating the mass of CuSO4 it can be an error. For the distilled water used tap water here. Conclusion:- According to the graph the concentration of the unknown solution is found to be
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Page I - Cover sheet In the middle f the page give name and number of your microorganism In the right lower corner provide - your name - Lab section number (Biol 108-005) - Date submitted ( 4/18/2013) - the unknown tube # is 5 Page II table of result - This page will have your table of results include the following information - Name of the test - Medium used - Indicator used - your results Part III - All the test done As many pages as needed to do a complete job. in this section
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Distillation Purpose: To conduct the distillation process‚ simple or fractional. Procedure: 1. Add 5ml of 20% ethanol: water mix to the distillation flask. 2. Add 23 stir bar 3. Make sure that the thermometer bulb is just below the Claisen Head‚ carefully. Be very gentle with the thermometers and take care not to break them. 4. Label 3 vials‚ 1‚2‚ and 3. 5. Place receiving vial 1 on ice to collect the distillate 6. Start the distillation by piling up hot sand around the distillation flask with
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