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Gram Stains and Endospore Stain on Bacteria - Essay

Gram Stains and Endospore Stain on Bacteria

BIOL2310
29 January 2017

FEEDBACK: Give gram stain background in the intro. You are not able to see bacteria at 4X, 10X, and 40X. Oil immersion is necessary to visualize bacteria. Figures need titles and explanations.

Lab Report 1: Gram Stains and Endospore Stain

Introduction

Bacteria come in all different shapes and sizes which may cause difficulty when trying to distinguish one bacteria from another. However, over the years scientists have come up with numerous techniques to recognize and classify bacteria. Two of these techniques are the gram stain and the endospore stain, which both allow an individual to see certain bacteria with the aid of a bright-light microscope, ...

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Various characteristics between the two groups cause a bacteria to be either gram-positive or gram-negative, but one of the most significant traits that distinguish a gram-positive bacteria from a gram-negative bacteria is the difference of peptidoglycan in their cell wall. Gram-positive bacteria have a rather thick layer of peptidoglycan, whereas a gram-negative bacteria has a thin layer of peptidoglycan followed by an outer membrane (Smith & Hussey).
Another stain important in the field of microbiology is the endospore stain. Endospores are dormant cells that are highly resistant to heat and other harmful factors (Allen, Anderson & Salm, 2016). Due to this reason, endospores require a different technique called the endospore stain, which is used to make endospores easier to see under a microscope (Hussey & Zayaitz). This stain requires a steamer due to the fact that endospores are highly resistant to heat.
This lab will practice both the gram stain and the endospore stain ...

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would not dry. After this step was completed, the E. coli was then rinsed gently with water for a minute. After a minute was finished, the next solution to be placed onto the bacterium was the gram's iodine solution for one minute. Once a minute passed, the slide was then rinsed with water to remove excess solution from the slide. It was important to be gentle with the water to ensure that the bacterium was not rinsed away. The next solution that was poured onto the bacterium was the decolorizing agent which was only to be poured onto the slide for 10-12 seconds instead of one minute like the other solutions. After the decolorizing agent, the slide was rinsed properly for one minute ...

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PAPER DETAILS
Added: 7/6/2017 12:56:39 PM
Submitted By: panama987
Category: Biology
Type: Premium Paper
Words: 1641
Pages: 6

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