Gram staining

Water has a huge ability to serve as a mode of transmission for certain pathogens. Even though water carries so many different pathogens, due to fecal contamination, it is impossible and expensive to try and ensure ever type of water is free of pathogens. In this experiment, we verified three different samples of water and determined the amount of fecal contamination in each. The three samples of water included: Little John Lake, Leaf River, and a roadside lake. It was predicted that all three

while the background remains yellow. Due to its ability to stain senile plaques, the stain is commonly used to look at tissues diseased with Alzheimer's disease. Hematoxylin and Eosin Stain (H&E) Indicated by its name, this method of hystogical staining involves two dyes. The first of which is Hematoxylin. As a basic dye, hematoxylin works as an acidophilic substance. Because of this, it stains nucleic acids blue and purple. Thus, with this stain the nuclei of cells are stained blue. The second

rinsed slide until the slide runs slightly blue. If the bacterium retains the crystal violet it is due to the thicker peptidoglycan in the cell wall (gram-positive). The bacteria will then be stained with the counterstain safranin for 45 seconds. When crystal violet is not retained in the cell wall of the bacterium it will stain pink (gram-negative). A gram stain was immediately performed with the recently inoculated streak plate. An inoculating loop was used to gather some of the bacteria from an isolated

A Eukaryotic Genotoxicity Biosensor Commonly used genotoxicity tests are designed to be tested on bacteria, a domain of life very different from the eukaryotes scientists are testing for. Scientists at UMIST worked to develop a new genotoxicity test that would be closely related to the eukaryotes being studied. Genotoxicity is the property of chemical agents that causes damage to DNA which then causes usually deleterious mutations. Scientists study the genotoxicity of chemicals to limit the exposure

Today is officially the first day of my nursing career, this is the day I have been looking forward to for years. Recently, I received a position as an emergency room nurse which has been my desire for as long as I can remember. The pace and the unpredictability are the factors that drew me into this field of nursing and finally, I can experience it as a registered nurse. I hear the familiar sounds of the ambulance approaching getting louder with every second, I can feel my heart thumping in my chest

In part A, we can identify all of amino acid, Protein and peptide bond by used bond by used to Ninhydrin will detected amino acid by reach with alpha-amino group. In the experiment, all samples are give positive Result except urea because urea is ‘not amino acid or protein.So,the negative result of urea is correct that no change color of product.Glycine,glutamate and methionine give the light purple product. There are positive result show that all of them are amino acid. White cysteine ,Cosein

After finish with SIM test, we jumped to MR-VP Test which is a combination medium used for both Methyl Red (MR) and Vofes-Proskauer (VP). It’s a solution containing peptone, glucose, and phosphate buffer. MR Test is to detect organisms capable of performing a mixed acid fermentation, and VP Test was designed for organisms that are able to ferment glucose, then convert their acid products to acetoin and 2,3-butanediol. My result came out to be MR positive which was red color and VP negative due to

different bacteria by simple, negative, and gram staining. To view each bacteria cell, the bacteria was transferred aseptically to a slide, and they were then viewed by using oil immersion, by a light microscope. From this lab, it was determined that E. coli and B. megaterium are gram negative and B. subtilis and S. Marcesans are gram positive. Introduction The purpose of this lab was to view the different characteristics of bacteria by applying various staining techniques. It is important to know

Gram Staining: Micrococcus leteus, Escherichia coli, and Unknown Colony Ethan Hinkle Microbiology Lab 3051, Section 001 Instructor: Harrison Taylor February 9, 2015 This report represents my individual effort. I did not receive or offer aid to anyone when performing this assignment, nor did I plagiarize any material. Signed: __________________________________________________________ INTRODUCTION In 1884, Danish Physician Hans Christian Gram was in the process of developing a

for their shape or multicell arrangement, but cannot be truly identified by just those characteristics (Strelkauskas, Edwards, Fanhert, Pryor, 2016). Bacteria can be classified by the way they stain. They are clear under a microscope and require staining to be seen. To stain a bacteria, one takes a dye to color the cells. There are basic dyes that contain