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  • Two Transfer Pipettes Of The Gatorade Solution
    734 words
    The Effect of Concentrations of Starch and Sugar Solutions on Synthetic Semi-Permeable Membranes By: Jamie Hardy Question: Is dialysis tubing selectively permeable? Hypothesis: If one has dialysis tubing, which is dipped in water, filled with Gatorade and starch and is left for 15 minutes, the sugar in the Gatorade will exit the dialysis and into the water. So the dialysis is semi-permeable. Materials: 16 cm dialysis tubing beaker cylinder test tubes transfer pipettes Gatorade Starch solution 10...
  • 5 Test Tubes With Deionized Water
    1,640 words
    Detection of Biological Molecules Introduction: Without carbon, nitrogen, hydrogen, sulfur, oxygen and phosphorus, life wouldn't exist. These are the most abundant elements in living organisms. These elements are held together by covalent bonds, ionic bonds, hydrogen bonds, and disulfide bonds. Covalent bonds are especially strong, thus, are present in monomers, the building blocks of life. These monomers combine to make polymers, which is a long chain of monomers strung together. Biological mol...
  • Exposure Solution In The Test Tube
    881 words
    MATERIAL AND METHODS Stability of cell membrane using pHF or the lab experiment for testing the stability of beet cell membranes using pH, many materials were used as follows. Obtaining a beet we punch out cores, using a cork borer. After washing the cores we put each one inside a separate test tube, and added a different pH solution in each one. After 3 minutes in these exposure solutions, we took the beet out with a dissecting needle. Then transferred each beet to a separate test tube containi...
  • Test Tubes 5 Fermentation Tubes
    766 words
    Planning PROBLEM TO BE INVESTIGATED Yeast enzyme specificity: Specificity of Brewers and Bakers yeast enzymes to different sugars (being monosaccharides) HYPOTHESIS I predict Bakers yeast to have a different enzyme specificity compared to Brewers yeast where more CO 2 is produced at 37 0 C. BACKGROUND KNOWLEDGE Fermentation is the breakdown of sugars by bacteria and yeast using a method of respiration without oxygen (anaerobic respiration). It involves a culture of yeast and a solution of sugar,...
  • Different Kinds Of Sugars Into Test Tubes
    670 words
    Enzyme Activity Abstract: The purpose of this experiment is to test the effects of different sugar types with pH and temperatures. We are testing to see if there is a difference in reaction and reaction time when placed into different temperature and pH. We are looking for changes in color, solidity, reaction time, etc. My hypothesis is that at different temperatures and amounts of pH, there will we different reactions. Introduction: The overview of these experiments is to test enzymes and see w...
  • Experimental And The Control Test Tubes
    2,926 words
    Materials and Methods The first experiment involved examining the effect of temperature on aerobic respiration of germinated pea seeds. The students testing the effect of temperature, will be divided into two groups. The first group is Student Pair A. They will test the effect of 10 C, 20 C and 30 C temperatures on pea respiration rate. The second group is Student Pair B. They will test the effect of 40 C and 70 C temperatures on pea respiration rate. For both groups, the first procedure calls f...
  • Phenol Red Carbohydrate Test
    643 words
    Enterobacter Aerogenes Identifying bacteria may seem like a daunting task, but if approached slowly and methodically it can be achieved. The objective assigned to each individual in Dr. Robbins microbiology lab was to identify a randomly chosen bacterium. I chose test tube number forty-six. Upon selection, I immediately conducted a gram stain to determine if the unknown was gram negative, gram positive, and find out cell morphology. I discovered that my unknown was a gram-negative bacillus with ...
  • Thermometer And Wire Into The Test Tube
    526 words
    Question: What is the solubility curve of KNO 3 Prediction: Draw a sketch to show the shape of the curve you expect for the solubility of a typical solid dissolving in water at different temperatures. Plot solubility on the y-axis and temperature on the x-axis. Materials: Large test tube Balance Stirring wire Two-hole stopper to fit the test tube, with a thermometer inserted into one hole 400 mL beaker graduated cylinder or pipette or burette hot plate or Bunsen burner with ring clamps and wire ...
  • Hcl And Zn In A Test Tube
    511 words
    I Purpose: Observe chemical reactions and ID reactants and products of the reactions. Classify the reactions and write balanced Equations. II Theoretical Background: A chemical reaction is a what happens to components that causes a physical change. Hypothesis: You can determine a chemical rxn by the physical change that takes place. IV (A) Equipment: Burner, wood splints, crucible tongs, micro spatula, test tubes 7, test tube holder, test tube rack, sandpaper, evaporating dish, safety goggles, l...
  • Place With 60 Sucrose Concentration
    410 words
    The Relationship Between Food Concentration, and Respiratory Activity In this experiment different concentrations of sucrose were tested to determine which leads to the most respiratory activity in yeast. Yeast is a heterotrophic anaerobic fungus which lacks chlorophyll. Yeast is used commercially to ferment the sugars of wheat, barley, and corn to produce alcohol, and in the baking industry to raise or expand dough. Yeast or alcoholic fermentation is the anaerobic process of respiration by whic...
  • Three Test Tubes Back
    971 words
    Problem: How are carbohydrates identified as a monosaccharide? Hypothesis: I predict that when we add the Benedict's solution to the different types of saccharides and then boil it we will most be able to determine all the information the we need to accumulate to record data resulting in the conclusion for the Benedict's solution. I always plan to see the addition of the Iodine work wonders in its own way. Both ways will help us determine factors with the unknown and known carbohydrates. I also ...
  • Amount Of Water In The Test Tubes
    1,288 words
    Introduction During lab on Monday, April 9, 2002 our class conducted a lab on water chemistry and pollution. The two bodies of water that were choose as samples where, the Wall pond and the HGTC pond. Each group had to test the water for Temperature, Dissolved Oxygen, Nitrate, Phosphate, pH, and Turbidity. Only two people where chosen to test the waters for Coliform bacteria. "Coliform bacteria are not pathogenic (disease causing) organisms, and are only mildly infectious. For this reason these ...
  • Known Substance Naphthalene In A Test Tube
    454 words
    Freezing Point of Naphthalene. Purpose To determine the freezing point of a known substance, naphthalene II. Materials ring stand gas source test tube test tube clamps thermometer naphthalene Bunsen burner goggles hose stopwatch. Procedure 1. Assemble the Bunsen burner, attaching one end of the hose to the burner and the other to a gas source. 2. Assemble the ring stand so that a ring clamp is attached to the stand holding the test tube that will be used in the experiment. 3. Fill the test tube ...
  • Iodine And The Benedicts Test
    1,066 words
    Salivary Amylase Lab In this laboratory, I observed the process by which salivary amylase, an enzyme secreted by the salivary glands in the mouth, breaks starch down into maltose. This requires a relatively straightforward experiment with only a couple of indicators, some test tubes, and a starch source. To understand the process, one has to understand chemical reactions with enzymes and the its major role in the digestive system of the human (Chapter 37). Just to refresh the reader, I will defi...
  • Blue Litmus Paper And Red Litmus Paper
    467 words
    What is in each test-tube? What proof do I have of this? Test-tube A: Test-tube A had water in it. I can base this on the fact that it was a neutral, reacting neither to red or blue litmus paper. Phenolphthalein also did not react to this substance. The pH value was 7, neutral, also adding to the proof that this substance was water, because water is neutral. The substance was clear and odorless, and all of these reactions combined led me to my conclusion of substance A being water. Test-tube B: ...
  • Reaction Fe 3 Scn Fescn 2
    442 words
    Work to be done: By experiments find out how chemical equilibria works. Chemicals and apparatus: Two beakers Five test-tubes Kaliumtiocyanat, KSCN 0.002 M Kaliumtiocyanatsolution, KSCN + H 2 O Dinatriumfosfat, Na 2 HPO 4 0.002 M Iron ( ) nitratesolution, FeNO 3 0.2 M Silvernitratesolution, AgNO 3 Lab: Lab 1 One test-tubes is filled half of distilled water (A) and another with kaliumtiocyanatsolution (B). Both solutions are colorless. Solution (B) contains SCN-. I add five drops of iron ( ) nitra...
  • Egg White And Cheese
    1,220 words
    October 14, 1998 Lab report INVESTIGATION 5: NUTRIENTS IN FOODS This experiment has to do with foods and their nutrients. We are finding out how much nutrients these 6 specific foods have and don't have: cheese, hotdogs, egg yolk, egg white and potato. We are testing them for starch, sugar, fat and protein. For my hypothesis I will start with starch. I think that cheese would not have that much starch in it for the reason of this cheese is a dairy it is made out of milk. Hotdog's don't have star...
  • Potassium Thiocyanate And Iron III Chloride
    1,089 words
    Experiment 36 Disturbing Equilibrium Aim: To observe the effect of a change in conditions on a system at equilibrium and explain the effects observed through Le Ch^atelier's principle. Equipment: 5 medium test tubes 1 test-tube rack 1 100-mL beaker 1 250 mL beaker 1 dropper pipet 1 spatula 1 50-mL graduated cylinder 1 white card, to record Materials: Saturated potassium nitrate solution, KNO 3 0.1 M Iron ( ) chloride, FeCl 3 0.1 M Potassium thiocyanate, KSCN Potassium chloride crystals, KCl Pota...
  • Precipitates In Benedict's Solution At Ph 2
    1,131 words
    Introduction Invertase is a yeast-derived enzyme that is mainly used in the food (confections) industry where it helps prevent sugar crystallization in confections by hydrolysis of sucrose to yield glucose and fructose (web). Sucrose + H 2 O -- - glucose + fructose An enzyme is a catalytic protein that changes the rate of a reaction without itself being consumed by the reaction. Due to its protein ous nature, invertase is sensitive to its environment. In particular, changes in temperature and pH...
  • 36 0 C 14 2 Test Tubes
    3,905 words
    Introduction: Enzymes are biological catalysts that regulate and accelerate the rate of biochemical reactions within a cell, but are not used up or changed in those reactions, therefore are accessible for reuse. They allow reactions to occur at a lower temperature than would otherwise be necessary in their absence. However, almost every significant life process is dependent on enzyme activity and without them life would cease. Enzyme activity occurs on chemical substances known as a substrate. E...

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