CONCLUSIONS: The different specimens that were observed in this lab were Specimen #1: Bacterial Flagella Peritrichious proteus vulgaris, Specimen #2: Bacteria, Yeast, and Blood, and Specimen #3: Gram- Positive Bacillus. Each of the specimen were viewed under the 10x and 100x objective lens. The total magnification was 100x and 1000x, because the objective lens was multiply by the 10x eyepiece len. For the first specimen under the 10x objective len, it appeared to be colonies of circular particles. However, under the 100x objective len, it appeared to be blobs of irregular shapes. For the second specimen under the 10x objective len, it appeared to be colonies of small dots while under the 100x objective len, it is a small colonies of small circular dots that are clumped together. For the third specimen under the 10x objective len, there are a lot of rod- shaped structures while it looks like squiggly lines under the 100x objective len. For the HeLa cells, the only ones that one that show the HeLa cells were HeLa cells that were under low and high power objectives and both with phase constant. For the HeLa cells that were under low power objectives with phase constant, only the outline of the cells were shown. However, for the HeLa cells that were under high power objectives with phase constant, the structures and shapes can be shown. …show more content…
By learning how to use the light microscope its allows us to analyze the shapes/structures of the cells and if it was alive or
PURPOSE: to determine which of the 3 ionic compounds (NaCl, LiCl, or NaCH3COO) is most
Preparing specimen for electron microscope hard, light microscope still very useful as a window on living cells.
Concept 6.1 Biologists use microscopes and the tools of biochemistry to study cells 1. The study of cells has been limited by their small size, and so they were not seen and described until 1665, when Robert Hooke first looked at dead cells from an oak tree. His contemporary, Anton van Leeuwenhoek, crafted lenses and with the improvements in optical aids, a new world was opened. Magnification and resolving power limit what can be seen. Explain the difference. Magnification is the ratio of an object’s image size to its real size. Resolution is a measure of the clarity of the image; it is the minimum distance two points can be separated and still be distinguished
A1.Work under the hood! With a pair of tongs, hold a strip of magnesium in a bunsen burner flame. Do not look directly at the flame. Save the ash in a small beaker for the next procedure. If magnesium is substance "A" in the general equation, what is "B"?
The next step of the project included preparing a Gram stain to discover the cell shape, arrangement, and if the bacteria is gram positive or
A typical Risk Management plan (RMP) has five steps – Plan, Identify, Assess, Respond, and Monitor. As we discuss the five steps in details, it would be evident that they hold good in every set up in a business – be it IT or non-IT environment.
Since microorganisms are not visible to the eye, the essential tool in microbiology is the microscope. One of the first to use a microscope to observe microorganisms was Robert Hooke, the English biologist who observed algae and fungi in the 1660s. In the 1670s, “Anton van Leeuwenhoek, a Dutch merchant, constructed a number of simple microscopes and observed details of numerous forms of protozoa, fungi, and bacteria” (Introduction to Microscopes, n.d.). During the 1700s, microscopes were used to further explore on the microbial world, and by the late 1800s, the light microscope had been developed. “The electron microscope was developed in the 1940s, thus
The purpose of the lab was to determine the ratio of air to acetylene results in complete combustion of acetylene gas. The balanced chemical equation for this experiment was C2H2(g) + O2(g) --> CO2(g)+ H2O(l). Complete combustion is the reaction of an element or compound with oxygen to produce the most common oxides and energy. Complete combustion occurs when the fuel and oxygen combine in exact proportions to completely burn the fuel, which leaves a clean test tube. Incomplete combustion is the reaction of an element or compound with oxygen to produce some oxides with less oxygen than the most common oxides. Incomplete combustion occurs when there is not enough oxygen to react
The purpose of this lab is to insure that all students understand how to correctly use the microscope. Students will all learn proper care and handling of the microscope, as well as learning the correct way to look at slides and specimens through the microscope.
The purpose of this lab was to practice proper handling of the light microscope, learn the names and functions of the light microscope parts, acquire skill in using the light microscope by carefully following all directions, prepare a wet mount, and locate objects under low and high power magnification. In addition, we will learn to position objects when viewed with a microscope, adjust the diaphragm correctly to achieve proper light under low and high power, learn to locate objects at various places in the “depth of field” and use stains (iodine) as an aid.
The two independent variables were luminant cue patches (light cue, dark cue and equiluminant cue) and location of the cue and target (valid side with cue and target on same side and invalid side with cue and target on opposite sides). The dependent variable was participants’ reaction time in millisecond.
Cold-tolerant fish have the ability to survive in freezing waters that would kill many other animals, due to them lowering the freezing point of water inside their bodies. This is due to the colligative property of freezing point depression, a process in which adding a solute to a solvent lowers the freezing point of the solvent. A colligative property is a physical property that depends on the amount of solute in the solution, rather than the nature of the chemical structure. The overall goal of this experiment was to determine the identity of an unknown
During my student teaching experience and my first year of teaching, I noticed that many students struggled to coherently write about their results or conclusions at the end of a lab. Therefore, during my second year of teaching, to help my students strengthen their writing skills, I decided to incorporate a few lessons on the procedures of writing a lab report. Once we had covered the essential parts of the “Scientific Method,” we segwayed into discussing the importance of lab reports in the real-world. We talked about how scientists use them to communicate results, as well as discussed how writing them would develop and sharpen my student’s scientific inquiry skills and scientific thinking. Initially, writing a lab report is a very
Bacteria vary greatly in terms of their characteristics and morphology. Colonies can be classified according to their colour, form, elevation, margin and size. Pure cultures of microorganisms
By using their microscopes, they found that every living plant and animal they examined was made of cells. As microscopes were improved, scientists were able to see smaller and smaller organisms. They found that no matter how large or small the organism was, it was made of cells, leading to cell theory. For example, a German biologist, Theodor Schwann discovered that all plant and animal cells were divided into cells by looking through his microscope. He also discovered that the cell is the basic unit of organization in organisms. Cells can be grouped together to form tissues, which can in turn be grouped together to make an organ. Organs can be grouped together to form a system, which is part of an organism. He was able to use microscopes to see the ways that cells work and help to determine which kind of microorganisms (bacteria) is causing the disease and making people ill. This is particularly valuable in the study of the components of organisms, where physicians are able to overcome a treatment of method to kill disease cells and restore people¡¦s health. The microscope revealed not only the cellular structure of human tissues, but also the organisms that cause diseases. The discovery of cells led scientists to study cells and discover more information about cells; this, allowed scientists to find ways to prevent or cure diseases. The use of microscopes has made many