Describe your observations from a fresh yogurt slide you prepared
Yogurt in microbiology
They have similar shape but the bacterial cells were smaller while the blood smear was a lot more going on. This is important in the medical field because identification of unknown bacteria can help. Evenly smearing the sample across the slide makes it possible to distinguish individual cells. By leaving the prepared yogurt unrefrigerated the bacterial were given the chance to proliferate as refrigeration retards bacterial growth. Place one side of a coverslip at an angle so that its edge touches the slide and the outer edge of the drop. Adding a couple of strands of cotton from a tissue or swab or else adding tiny bits of broken cover slip will add space and "corral" the organisms. Objective lenses- 4x, 10x, 40x, and x powers E. Updated May 06, Microscope slides are pieces of transparent glass or plastic that support a sample so that it can be viewed using a light microscope.
Ocular Lens- the lens on the top of the microscope that look into with 10x or 15x power. One way to retard evaporation is to use a toothpick to coat the edges of the cover slip with a thin rim of petroleum jelly before dropping the coverslip over the sample. Course adjustment — used for the initial focusing of field I.
To presumptively identify the bacterial isolate Due to their ubiquitous presence, Bacillus spp may present as a contaminant in the culture plates.
In this lab, the objective was to observe the changes in size of a carrot. There are different types of microscopes and also different types of samples, so there is more than one way to prepare a microscope slide.
NOTE: Step 2 is optional.
Bacteria growth in yogurt
What is the purpose of immersion oil? Following finding the log of each molecular weight of each band, band one showed the highest molecular weight. Immersion oil raises the resolution of the objective lens. Main tube — moves vertically for focusing C. They occur as pairs, which add the prefix diplo, such as diplococci. This is important in the medical field because identification of unknown bacteria can help. Body Tube- Connects eye piece to the objective lens C.
Take a second clean slide. It may be necessary to use a knife or razor blade to shave a section of sample.
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