Introduction It is crucial in the field of microbiology to study the morphology‚ biological activity‚ and the behavior of microbes thus the isolation of such microbes from the environment is necessary because it allows scientists to study them in close proximity. Microbial life forms are found everywhere. They are major players in biogeochemical cycling of elements and primary producers in numerous environments. There are also some microbes living inside higher forms of organisms that aid in digestion
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of microbial growth? Did these results match those predicted? The garbage sample‚ as well as the stream sample‚ provided suitable conditions for bacterial growth. In fact‚ in these two samples‚ bacterial growth covered the entire Petri dishes. However‚ a large number of bacterial colonies manifesting the most significant variances in their morphologies
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few micrometres in length‚ bacteria have a wide range of shapes‚ ranging from spheres to rods and spirals. Bacteria display a wide diversity of shapes and sizes‚ called morphologies. Bacterial cells are about one tenth the size of eukaryotic cells and are typically 0.5–5.0 micrometres in length. Intracellular structures: The bacterial cell is surrounded by a lipid membrane‚ or cell membrane‚ which encloses the contents of the cell and acts as a barrier to hold nutrients‚ proteins and other essential
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Review Sheet Exercise I: Survey of Higher Microorganisms: Protozoa‚ Fungi‚ and Helminths Protozoa (group of Kingdom Protista) 1. Amoeba a. nucleus- dark center of the cell b. food vacuole- They feed by taking nutrients into the cell by diffusion and packaging it into (clear circles spread throughout the cell) c. pseudopod- “false foot”; the motility results from the streaming of the protoplasm that forms the process 2. Entamoeba causes amoebiasis or amoebic dysentery‚
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A Basic Understanding of Microscopy Assignment 1 Kaplan University-Microbiology Since microorganisms are not visible to the eye‚ the essential tool in microbiology is the microscope. One of the first to use a microscope to observe microorganisms was Robert Hooke‚ the English biologist who observed algae and fungi in the 1660s. In the 1670s‚ “Anton van Leeuwenhoek‚ a Dutch merchant‚ constructed a number of simple microscopes and observed details of numerous forms of protozoa‚ fungi‚ and bacteria”
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Identification of Bacillus subtilis and Serratia marcescens Through a Battery of Tests and Plates Introduction: The purpose of this experiment was to use a systematic battery of tube tests and plates designed to lead to identification of two unknown bacterial species‚ from the combination of all results. A sample of bacteria was used‚ labeled “Sample 4”‚ from which both species was to be obtained‚ one gram positive and one gram negative. Table 1 is a list of the possible bacteria to be identified; the
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Unknown Microorganisms May 1‚ 2013 This paper is based on an experiment done in the laboratory over a period of time using the standard method of identifying an unknown microorganism relying on features such as morphology‚ arrangements and biochemical reactions. It was done in succession with each step complimenting the other. At the end of the experiment three microorganisms Bacillus azotoformans‚ Staphylococcus aureus‚ and Escherichia coli was identified and one result was inconclusive. The
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plate At the first inoculum‚ all the bacterial colonies were overlapping with each other and it was difficult to distinguish the colonies. At the 4th and 5th inoculum‚ it was easier to distinguish the colonies as they grew apart from each other. The appearance of each colony type could be determined at the final inoculum. Spread plate The colonies were distributed evenly over the surface of the nutrient agar but there were more overlapping of colonies. Bacterial colonies could still be distinguished
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most contaminated toilet Sink were isolated by dilution technique. The dominant bacterial strains are identified as Bacillus sp.‚ on the basis of morphological and biochemical characteristics. Gram’s staining: Gram positive and rod shape. They were serially diluted and spread on nutrient agar plates. The starch has been hydrolyzed and a clear zone by the addition of iodine solution. Visual identification: When bacterial biomass mixed with silver nitrate solution (pH 7.5) and incubated at 37° C for
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a drawing form draw the organisms you see using proper scale and proportion. 4. Provide the following “Observations” in the space to the right of the drawing circle: a. Gram reaction (color and interpretation) b. Morphology (shape) c. Arrangement (how did the bacterial
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