Bacteria Classification By Gram Staining THE AMERICAN UNIVERSITY IN CAIRO BIOLOGY DEPARTMENT SCIENCE 453 : BIOLOGY FOR ENGINEERS REPORT No.1 Presented By : Karim A. Zaklama 92-1509 Sci. 453-01 24/2/96 Objective: To test a sample of laboratory prepared bacteria and categorise it according to Christian’s gram positive and gram negative classes and also by viewing it under a high powered microscope and oil immersions; classify its shape and note any special characteristics. Introduction: Bacteria
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but diversely distinctive by the specific way they accomplish that means‚ hence all the different classifications. It was in the year of 1888 that the studies of two German scientists‚ Hellriegel and Wilfarth‚ proved that it was the root nodule bacteria that provided nitrogen to their host plants. The next year‚ Frank (1889) published the nodular symbiont under the name Rhizobium leguminosarum‚ and it has remained to this day. These studies brought to light the importance of rhizobia and leguminous
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be similar to the pictures below. (In these examples‚ the time after plating is different for the two samples‚ so be aware that the colonies in these photos are different sizes for a reason.) We will culture our bacteria for about 2-7 days. Characteristics are most visible if the bacteria are examined using a stereoscopic scope. E. coli Shape (form): circular Margin: entire Elevation: raised Size: punctiform‚ small Texture (surface): smooth Appearance: shiny Pigmentation: nonpigmented (colorless)
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differences between bacteria‚ viruses‚ fungi and parasites. Answer to 1.1 – The difference between bacteria‚ viruses‚ fungi and parasites are: Bacteria – Bacteria is a single celled organism‚ bacteria have evolved to be in any environment and can be found in any substance/surface and also in the human body‚ only 1% of bacteria is actually harmful. It’s bad or infectious bacteria that causes illness as they rapidly reproduce and produce a toxin that kills or mutates cells‚ bacteria is also self-sufficient
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MIC 230 Unknown Identification Report The objective of this experiment was to identify an organism from a mixture of two unknown bacterial species. In order to accomplish this‚ I first plated my unknown mixture on Tryptic Soy Agar (TSA)‚ Columbia Naladixic Acid (CNA)‚ and MacConkey’s Agar (MAC) plates. After 48 hours of incubation‚ it was unclear that two different bacterial colonies had grown on my TSA plate. Only one type of colony was evident. However‚ it was apparent that I had successfully
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This is because gold is very resistant to bacteria. Bacteria are microscopic single-celled organisms. Bacteria are prokaryotes‚ meaning the entire organism consists of a single cell with a simple internal structure. The DNA of a prokaryote is neatly packed in the nucleus. The bacterial DNA floats freely in a twisted threadlike mass called the nucleoid. Gold is unaffected by almost everything. The only materials that can affect gold are man-made. Since bacteria are a natural organism‚ it cannot react
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Associate Program Material Levels of Life Worksheet Complete all three parts of this worksheet. Part I: Atomic Structure – Fill in the missing information on atomic structure and organic compounds. |Atomic Structure | |Subatomic Particle |Charge |Location in an Atom | |Proton
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Experiment H: Identification of an Unknown Organic Compound The objective of this lab was straightforward. We were given an unknown compound and we were to perform an IR spectroscopy and as well as NMR spectroscopy. With the IR spectroscopy‚ I was able to name the functional groups I have on my compound and further confirmed my assumptions by looking at the NMR spectroscopy after. The unknown number I was given was number 203. The molecular weight of the compound was 121. From the molecular weight
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able to observe motility? Carbohydrate Fermentation Testing Questions A. What is fermentation? B. Why is it important not to incubate the fermentation tubes beyond 24 hours? C. Why is phenol red added to the fermentation tubes? D. Why do bacteria have differences in the carbohydrates they can ferment? E. Why does the formation of yellow color indicate fermentation? F. What information can be gained by running a fermentation series on a particular microbe? G. What does a dark pink or red
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CHAPTER 4: THE ORGANIZATION OF LIFE VOCABULARY LIST DEFINE THE FOLLOWING TERMS FROM THE GLOSSARY: ECOSYSTEM: a community of organisms and their abiotic environment. BIOTIC FACTOR: an environmental factor that is associated with or results from the activities of living organisms (100) ABIOTIC FACTOR: describes the non-living part of the environment‚ including water‚ rocks‚ light‚ and temperature. ORGANISM: a living; anything that can carry out life processes
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