Title: Primary cell culture of a chick embryo Aim: To establish and maintain the primary cell culture of a chick embryo Theory: Historically, early attempts at tissue culturing used biological culture medium such as blood serum, clotted lymph or tissue extract to grow cells outside the body. Tissue culturing is a biological research that involves the fragmenting of tissue from an animal or plant. These tissues are transferred to an artificial environment to test their ability to survive and function. The artificial environment or medium must contain proper proportions of the necessary nutrients, amino acids, and a balanced pH for the cells to be studied. Cultures are can grown either as single layers of cells on a glass or plastic surface or as a suspension in …show more content…
20 ml DBSS was pipetted out and added into the dish. 8. The embryo was dissected using two scalpels and the organs arranged around the periphery of the dish. 9. 1ml (1000 µl) of 0.25% Trypsin was pipetted out and added to a clean test tube. A piece of the dissected tissue was transferred into the test tube containing trypsin using forceps and the tube closed. 10. The tissue was incubated at 40C for 6- 18 hours in a refrigerator. 11. After incubation, the trypsin from the test tubes was carefully removed without disturbing the tissue and further incubated in the residual trypsin for 15–20 min at 370C. 12. 2ml of media was added to two 60mm petriplate and to the test tube containing tissue and the residual trypsin. The media was then pipetted up and down in the test tube to disperse the tissues. 13. The tissue was equally transferred into petriplates using pipettes. The media was then mixed in the Petri plate using a micro pipette. 14. The cells were incubated in the CO2 incubator for 12 hours. 15. The cells were viewed through the inverted microscope after an overnight incubation. 16. Confluency of plate was checked, and the cells again incubated in the CO2 incubator for 5-7 days to get a confluent
Problem 3 solutions using different approaches in the literature Approach Reference Machine cells Number of intercellular
Catalase Activity on Substrate Based On Gas Pressure Production Rate Name of the Class Author’s Name Date Enzymes are organic compounds which act as catalysts and speed up biological reactions in biological organisms. They are not destroyed or changed during the reaction but rather they are used over and over again to catalyze many more reactions. Their activity may be affected and altered by factors such as temperature, substrate concentration, enzyme concentration and Ph.
Incubate the tubes on ice for 30min and make sure to push the tubes all the way in. During this time, label 4 agar plates with: +pGLO LB/amp, +pGLO LB/amp/ara, -pGLO LB/amp, and -pGLO LB, the nutrients and ampicillin should be integrated within the agar. Next, one of the most important steps, heat shock, is used to assimilate the plasmid
The sample was then incubated at 56°C to lyse the tissue. The sample was checked every fifteen minutes and vortexed between each checking for an hour and a half until the tissue was completely lysed. The tissue sample was then again vortexed. Next 200 microliters of buffer AL was added and
As well, slightly longer relative times were observed in the plant telophase, which may have occurred due to the forming of the cell plate in plant cells, which could cause this phase to take
Starch solution is then placed into the test tube at a quantity of 5 mL. 5 drops of Lugol’s Iodine solution is added to the test tube. If the color changes, then it is known that starches are present in the solution. Proteins are next tested. In order to do this, 5 mL of gelatin solution is added to the test tube. 10 drops of Biuret’s reagent are added to test for protein.
We then obsevered the two slides for number of cells as well as for food vacuoles inside a cell using a microscope at times of 0,5,10,20, and 30 minutes. Results The following graphs show the results of this experiment. The tetrahymena sample that was introduced to concentrated tobacco had a lower cell/vacuole ratio than the tetrahymena sample that was not exposed to
Pat McGurrin October 24, 2015 Period #1 Honors Biology Mr. Dinunzio Murder and Meal Lab Analysis Procedure: 1.) Gather all materials: Safety goggles, 250ml beaker, water, hot-plate, test-tubes, paper bag tear, stomach contents, pipette, Biruet solution, Benedict’s solution, and Iodine solution. 2.) Put on safety glasses.
Lab 3 – DNA extraction and visualization Journal -Madhu Thalari. 1.Describe the laboratory exercise as you interpreted it.? Ans: This lab has given me methods to extrct DNA from both plant cells and animal cells. The main steps that are followed in both methods made me understand the reasons behind them. In order to extract DNA we need break the barriers(cell wall and cellmembrane), remove water, protiens and other unwanted material, make sure that the chemical we used should not damage DNA that we need and add flouroscent material to visualize the DNA.
In this lab when looking at cells, we observed the salinity and osmolarity of the cell when placed in the environment. With the different concentrations of NaCl, we are able to see how different environment can constrain an organism and see the wide range of responses to regulate in cell’s osmolarity. The cells we studied was sheep red blood cells (erythrocyte), because they are the most studied membrane system and therefore used as ideal membrane to study the relationship between water and the passing of the different concentration of NaCl across the membrane. The purpose of the experiment was to observe the cell and infer which direction of the flow of the water due to the cell volume change.
Artificial tissues such as skin are formed using stem cells in the laboratory. As a case in point, in 1990, Gary Stakemiller, an electrician in Orlando received a skin transplant made of skin that was grown in a laboratory (Ricks). Stakemiller needed this graft because over a month earlier, he received burns on seventy five percent of his body (Ricks). The new skin was produced by using a “starter” medium which grows in a laboratory from cells into usable skin (Ricks). It takes about three weeks to grow each sheet of skin from cells, proteins, and nutrients (Ricks).
This root tip was choosen because of its rapid growth and it can be easily avaliable and grown in large numbers. The rapid root growth proved advantageous as it allowed the observation of multiple cells in each mitotic stage within a small sample. It was expected that the majority of the cells found would be in interphase as a large proportion of the cell division cycle is spent with the cell performing its normal cellular functions. Materials: The Materials required for this experiment include; a
Do the same for the other test tubes. Let the test tubes not be disturbed for about 3- 4 mins. Then add the Amylase solution to the Starch solution and start the stopwatch (immediately). After every 1 min take one drop from the test tubes and place then in the test plate that were
Acids are proton donors in chemical reactions which increase the number of hydrogen ions in a solution while bases are proton acceptors in reactions which reduce the number of hydrogen ions in a solution. Therefore, an acidic solution has more hydrogen ions than a basic solution; and basic solution has more hydroxide ions than an acidic solution. Acid substances taste sour. They have a pH lower than 7 and turns blue litmus paper into red. Meanwhile, bases are slippery and taste bitter.
It also better to ensure that the materials like hemocytometer and pipettes are sterilized and clean so that there would be lesser or no artifacts would be seen under the microscope. The researcher was to use trypan blue exclusion method to test for cell viability, observe the non-viable and viable cells, and was able to have a cell count using the