Labset One Worksheet 1. Label and describe the function of each of the following parts of the microscope (7) A. The ocular lens/eyepiece transmits and magnifies the image from the objective lens to the eye. B. The body tube transmits the image from the objective lens to the ocular lens. C. The nosepiece is a rotating mount holding many objective lenses. D. The objective lens is the primary lens that gathers as much light as possible from the specimen and brings it to a bright focus
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1.1 BACKGROUND Every activity in modern life is influenced by plastics and many depend entirely on plastic products due to their useful material properties and low production costs. Almost every product is constituted of some kind of polymer; however‚ traditional synthetic polymers (often called plastics)‚ such as polypropylene and polyethylene‚ are derived from non-renewable petrochemicals and are not readily biodegradable (http://www.plastice.org/ fileadmin/files/Brochure_teachers.pdf). The need
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Introduction The purpose to this lab was to isolate and identify two unknown bacteria from a mixed culture provided to us by our instructor. This study was done by applying all of the methods that have been instructed on thus far in microbiology laboratory class. Each test performed‚ provided us with some key information about the unknown microbes in question and how the bacteria function. Materials and Methods Over a two week period‚ eight prepared types of test media were provided to
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International Journal of Food Microbiology 71 Ž2001. 1–20 www.elsevier.comrlocaterijfoodmicro Review article Bacteriocins: safe‚ natural antimicrobials for food preservation Jennifer Cleveland a ‚ Thomas J. Montville a ‚ Ingolf F. Nes b‚ Michael L. Chikindas a‚ ) a Department of Food Science‚ Rutgers‚ The State UniÕersity of New Jersey‚ 65 Dudley Road‚ New Brunswick‚ NJ 08901‚ USA b Laboratory of Microbial Gene Technology‚ Department of Biotechnological Sciences‚ Agricultural UniÕersity
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1. Title: Double unknown identification of a mixed culture of Gram-negative and Gram-positive bacteria 2. Author: Nick Fiore‚ University of Kansas‚ Biology 402‚ Fall 2014 3:00pm room 6040 3. Abstract: The purpose of this experiment was to isolate two unknown bacteria and perform a series of selective and differential tests to correctly identify each. After the bacteria was isolated a series of differential and selective tests following the dichotomous key attached were used to identify each bacteria
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Biotechnology In environment Clean up Process - APPSC G1 Mains - Paper 4 - Section 2 - Unit 3 The term "Environment" is defined as our surroundings which includes the abiotic component (the non living) and biotic component (the living) around us. The abiotic environment includes water‚ air and soil while the biotic environment consists of all living organisms – plants‚ animals and microorganisms. Environmental pollution broadly refers to the presence of undesirable substances in the environment
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64. Interpret the following results: A. The color of the medium remains purple or light blue-gray; there is also no change in the texture of the medium. * No change B. Change in the color of litmus from purple to pink or pink-red throughout the tube. Upon further incubation a white ring of litmus forms at the bottom of the tube at the pink-red color is now present only at the top of the tube. Still further incubation leads to the formation of a rennet curd at the bottom of the
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Lahela Correa 12/08/2009 Microbiology 140 Matthew Tuthill Unknown Lab Report Introduction There are many reasons for knowing the identity of microorganisms. The reasons range from knowing the causative agent of a disease in a patient‚ so as to know how it can be treated‚ to knowing the correct microorganism to be used for making certain foods or antibiotics. This study was done by applying all of the methods that I have been learned so far in the microbiology laboratory class for the identification
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QUALITY CONTROL Results after 24 hrs at 35º C Organisms ATCC Growth Colour Escherichia coli 25922 + red Proteus mirabilis 12453 + colourless Salmonella typhimurium 14028 + colourless Streptococcus faecalis 29212 - or partial Uses Acting as a visual ph indicator‚ the agar distinguishes those Gram-negative bacteria that can ferment the sugar lactose (Lac+) from those that cannot (Lac-). This medium is also known as an "indicator medium" and
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Lactic Acid + 4ATP They are heterotrophic and can be found extensively in nature including plant leaves (e.g. Lactobacillus‚ Leuconostoc)‚ the animal’s oral cavity (e.g. Streptococcus mutans)‚ digestive system (e.g. Enterococcus faecalis)‚ genitourinary tract (e.g. Lactobacillus) as well as faecal matter‚ compost and rotting vegetation. These areas normally have an adequate supply of amino acids and vitamins (Murray et al‚ 1998; internet 1). They are aero tolerant anaerobes which
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