Microbiology (Lab Report) Closed system growth curve Closed System Growth Curve Lab Report PURPOSE Bacteria grown in a closed system show a specific growth pattern called the growth curve which consists of four phases. The lag phase‚ which is a period of slow growth; exponential phase‚ period of maximum growth; stationary phase‚ where nutrients become the limiting factor making the growth rate equal to the death rate and the death phase where organisms die faster than they are replaced. It
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GROWTH CURVE NAME SURNAME :ahmet mehmeh STUDENT ID : DEPARTMENT : MOLECULAR BIOLOGY AND GENETİCS DATE OF EXPERIMENT: 02.03.2011 ABSTRACT In this experiment‚the cell growth of yeast is measured by using spectrophotometer and hemocytometer.We learnt how specthophotometer and hemocytometer use and also we learnt qualifications of hemocytometer and spectrophotometer.Serial dilution was used for this experiment and it was very important.Because
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Bacterial growth is the division of one bacterium into two daughter cells in a process called binary fission. Providing no mutational event occurs the resulting daughter cells are genetically identical to the original cell. Hence‚ "local doubling" of the bacterial population occurs. Both daughter cells from the division do not necessarily survive. However‚ if the number surviving exceeds unity on average‚ the bacterial population undergoes exponential growth. The measurement of an exponential bacterial
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Objectives: • To measure the different phases of growth of Escherichia coli through absorbance reading and viable count measurements • To plot the growth curve of Escherichia coli Methodology: [pic] [pic] [pic] Results and Discussion: In the experiment‚ the different growth phases were observed through the analysis of the absorbance of broth with inoculated organism (E.coli). There was no
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David Kennedy Bio 210 Lab Report 1 10/11/13 Microbial Growth Background Information: This lab was conducted in order to understand basic differences among differential and selective media‚ while recognizing how each media is used to isolate and identify microorganisms (Wistreich‚ 2003). The first microorganism analyzed was Staphylococcus epidermidis. This organism is gram-positive‚ single celled‚ arranged in grape-like clusters‚ and cocci in shape (Bukhari‚ 2004). S. epidermidis is approximately
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Experiment 9: Growth curve of Serratia marcescens Abstract Bacteria grows by binary fission. The aim of this experiment is to follow the growth of Serratia marcescens in nutrient broth at 37oCby recording the changes in turbidity (cloudiness) by measuring the absorbance of visible light (600 nm) and also to prove that there is an increase in the cell number and not just in mass during the growth. In the experiment we measure the full growth curve of Serratia marcescens by measuring the absorbance
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learns to adapt to the unfamiliar nutrient-filled environment it is placed. The second phase is called the log phase. During the log phase‚ the bacteria experiences exponential growth. Nutrients are metabolised at maximum speed until all of the nutrients are entirely consumed. At this point‚ the bacteria starts to limit growth. The third phase is the stationary phase and is a result of depleted nutrients. This is the phase where the bacteria ceases its metabolic activities. The final phase is simply
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up your family system.”(Virginia Satir‚ 301) quips the author near the end of her essay titled‚ “Systems‚ Open or Closed”. A system as described by the author is present all through human life and is developed by three or more persons who are in contact and share a common purpose; a system has a goal (growth)‚ has parts (people)‚ and an order to the parts (dynamics of people and interactions in the family). Satir’s essay is aimed at describing the continuum that interpersonal systems exist within as
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OPEN SYSTEM: A system that allows third parties to make products that plug into or interoperate with it. For years‚ the term "open systems" (plural) referred to the Unix world because Unix ran in more types of computer hardware than any other operating system OR Open systems are computer systems that provide some combination of interoperability‚ portability‚ and open software standards. It can also mean specific installations that are configured to allow unrestricted access by people and/or
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The closed circulatory system of some mollusks and all higher invertebrates and the vertebrates is a much more efficient system. Here blood is pumped through a closed system of arteries‚ veins‚ and capillaries. Capillaries surround the organs‚ making sure that all cells have an equal opportunity for nourishment and removal of their waste products. However‚ even closed circulatory systems differ as we move further up the evolutionary tree. One of the simplest types of closed circulatory systems
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