Test tube

Title: Du Test by Tube Method Aim: To perform the Du test by tube method Introduction: The D antigen is the most immunogenic antigen in the Rhesus blood group system. Rhesus positivity and negativity indicate the presence or absence of the D antigen on the surface of red blood cell. Du test is the further testing that is done to identify Weak D antigen when the cells being tested have failed to react with anti-D antisera at immediate spin. An indirect antiglobulin test is essential to identify patients with the Weak D antigen. The red blood cells are incubated at 37˚C with anti-D and then tested with anti-human globulin (AHG) reagent. This test is done on prenatal patients and candidates for Rhesus immune globulin. Du is also done on Rhesus negative patients to ensure they are truly Rhesus negative. It may or may not be done routinely on Rh negative candidates for transfusion, depending on the policy of the transfusing institution. If…

The clumps of baking soda granules will increase the time it will take for the gas to be released and since we are only heating the baking soda for a certain time, the volume of the gas will be lower than it should be. When transferring the baking soda into the test tube, it is likely that some of the powder will not go into the test tube, which will cause the volume of the gas to be higher than it should be. The temperature of the flame will affect the intensity of heat delivered to the baking…

Cream Milk 6 Test Tubes, Glass Rods and Measuring Beakers 7 Method 7 Results 8 Discussion 9 Conclusion 10 Appendix 10 Calculations: 13 Bibliography 13 Introduction Enzymes are core components of reactions. Enzymes can be employed to hasten, or even delay reactions. Enzymes themselves are simply biological molecules (proteins) that affect a reaction as a catalyst. A catalyst is a chemical that induces a chemical reaction. Lipase is an enzyme that the human body uses to break down fats in foods…

Introduction: In this lab, seven test tubes containing solutions in equilibrium had different stresses added to them to examine the balance in each example. The purpose of the experiment was to indentify the details of shifting in equilibrium reactions and determine how the adding of a stress can affect a reaction. A chemical reaction that is in equilibrium is reversible, where a reactants can create products and products can go back to products. Equilibrium is reached when the rate of a…

One source that has been found to cover this topic is a recorded documentary aired on PBS entitled "Test Tube Babies". This documentary includes examples of how doctors and other professionals attempted to complete in vitro fertilization before it was done successfully. An example included in the video was Dr. Landrum Shettles who attempted human egg fertilization in 1973 but was unsuccessful in producing a child from the method (Test Tube Babies). This account and others like it, help to…

embryo receives nutrients from outside sources, the fetus receives no nutrition from the umbilical cord of a mother ultimately reducing the chances of survival. People who favor the use of human genetics for conception suggest that the technologies increase the chance of infertile parents creating offspring. However, the truth is using human genetics for conception increases the chance of a miscarriage, while also putting the mother and child in danger. In the novel, Brave New World, by Aldous…

I chose to do my project on the Pyro board which is an adaptation of the Rubens tube. The Pyro board uses fire to demonstrate sound waves. I chose this as my project because I find music and fire fascinating. Having them interact to demonstrate the physics side of sound helped me understand all the different aspects that can effect sound waves and alter the way we interpret them. Before I started to build my Pyro board I did research on how they worked why they worked and why the flames reacted…

There seemed to be an error in the experiment conducted, which will be later discussed. In order to show what should have happened, the absolute value was taken of the answers using the numbers that were read from the spectrophotometer. For example, in the PTU test tube the amount after ten minutes subtracted from the amount after twenty minutes gave the answer of -0.023, but instead, and instructed by our teacher, we took the absolute value and said it was 0.023. The formula used to display…

Figure 3, Affinity Column: Protein Concentration and Enzyme Activity, shows the two peaks for protein concentrations on the red line. The blue line, showing the enzymes activity, overlaps with test tube six that contained the active trypsin. The lack of overlap over test tube one combined with a peak for a protein concentration identifies the inactive trypsin. Using the equation in the sample calculation of trypsin percentage, it was found that there was 75.6% yield of trypsin. Future labs…

Personal Energy and Material of Toothpaste The cycle of energy that gets put into the simple product of a tube of toothpaste is a rather lengthy one. Most people simply think of the raw materials that are put into the toothpaste, but what about the tube itself? Most people just consider the resources that are put into the paste, but what about the energy used to transport those resources or to mix them together. Perhaps one has considered the tube and the energy that was put into making it, but…