What kinds of clinical specimens may yield a mixed flora in bacterial cultures? Oral, Skin, or GI specimens 5. When more than one colony type appears in pure culture, what are the most likely sources of extraneous contamination? Individual colonies can be picked up on the inoculating loop, or straight wire and inoculated in to the fresh agar or brother media References Cowan, M. K. (2012). MICROBIOLOGY: A SYSTEMS APPROACH, THIRD EDITION.
The Bacterial Cell Wall Overview and Major Components 4. Peptidoglycan Structure and Function 5. Biosynthesis of Peptidoglycan 6. The Outer Membrane of Gram Negative Bacteria as a Resistance Factor 7. Lipopolysaccharide Structure and Function Acknowledgement: These lecture notes, including figures and schemes, were originally prepared by Professor S.G. Wilkinson.
Title: Lab 2: Bacteria and Protists Aim: 1. To differentiate bacteria using the Gram Stain 2. To investigate the three common bacterial shapes 3. To observe the various types of protists Procedure: Refer to the lab manual page 12-19 Result: Part I (A): |Gram-positive | |Streptococcus |Micrococcus | | | | |Gram-negative | |Escherichia coli |Serratia | | | | Part I (B): Table 1. Agar plates.
Mitosis In this experiment, I learned to make my own cheek cell slide to view under the microscope, and I also viewed fish cells under the microscope The purpose of this was to become familiar with a microscope and it's features, as well as, find and identify cells and the stages of mitosis. In doing so, I was able to differentiate between the different stages of mitosis from Interphase to Telophase. Materials: 1 Microscope 1 slide 1 slide cover 1 drop blue dye 1 tooth pick 1 slide with fish cells 1 camera phone 1 pen 1 piece of paper (in lab manual) Method: Cheek Cells First I took a toothpick and swabbed the inside of my cheek for a few moments. I then rubbed the toothpick on the slide, put one drop of blue dye on top of the slide, then covered the saliva/dye mixture with the slide cover. After that, I placed the slide under the microscope and began searching for the cells that were on the slide.
6.05 HONORS Lab Report: Dichotomous Key Directions: Use the Dichotomous Key on my site as you carry out this lab. Read all of the instructions below carefully, and fill out the BLUE portions of this sheet. Objectives: After doing this lab activity, you should be able to: Identify bryophytes, pteridophytes, gymnosperms, and angiosperms. Describe the characteristics and classification of the four main plant divisions. Materials: Four plant samples Dichotomous key (a copy is found in the Module Help column at www.rechanek.com) This lab report Hypothesis: 25% Bryophyta 25% Pteridophyta 25% Gymnosperms 25% Angiosperms Procedure: Read all the instructions for this lab before you begin working!
This researcher called his experiment" Bound water" "The water of Potato Tissue Potential". (Clemson University by Robert J. Kosinski) Quote: He talked about how, when using organic materials and beakers, there can be predictions made of how sucrose or NaCl molecules will bind up any hydrophilic solute if it is diffusing within a membranous condition. Because the potato is semi permeable , the potato tissue will always take up the water because the water is hypertonic and because it just simply moves into a concentration gradient. (Baumgarten and Feher, 1998; Weiss, 1996, pp. 216-222).
Chapter 18 Worksheet 1: Microbiology http://sci.waikato.ac.nz/farm/content/microbiology.html#types_of_bacteria Go to the link above and read the following sections: Cow’s guts and microbes, Discovery of Rumen Microbes, Why do cows need microorganisms? How many microbes live in the rumen? and What types of bacteria are in the rumen?. 1. The study of microscopic living organisms is termed microbiology.
Available from: Biological Abstracts 1969 - Present, Ipswich, MA. Noble E. Cell division in Entamoeba gingivalis. Univ California Publ Zool [serial online]. 1947;53(7):263-280. Available from: Biological Abstracts 1969 - Present, Ipswich, MA.
How many Microbes are Around us: The Effects of Disinfectants and Soaps on the Growth of Microbial Colonies in Agar INTRODUCTION The purpose of this study is to give us an idea of the quantity of microbes that we come in contact and interact with everyday. The secondary purpose of this study is to observe the effects of certain disinfectants and soaps on microbes grown in agar Petri dishes and determine their relative effectiveness. This will be done by three different methods of sampling and comparing the results. Fingers Test The first samples of the microbes were collected by the way of placing one's fingers on the half side of the Petri dish, then washing those same fingers with a soap or alcohol, and placing them on the other half side. The agents used to wash were "Softsoap", "Irish Spring" (bar soap), and Alcohol.
Biology Lab Report Bacterial Colonies in Your Environment Purpose The purpose of this lab is to culture, examine and describe microorganisms (bacterial colonies) from sources in daily surroundings that we are exposed to. Variables and Controls The independent variable was the places we decided to swab for bacteria. The dependent variable was the types of bacteria that grew within the agar plate The controlled variables were the temperature in the sir, how tight the agar plate was sealed and how much food was in the agar plate. Materials -a sterilized agar plate (with lid) -markers -soap and water -clear tape -sterile cotton swabs Lab Safety In this lab we needed to wash our hands constantly before and after the lab. We were dealing with bacteria that has the ability to be harmful and to avoid illness/sickness we need to thoroughly wash our hands and be careful around the bacteria.