generating fluid past a semi-infinite vertical porous plate with variable suction Mutua‚ N.M 1*‚ Musyoki‚ I‚ N.M1‚ Kinyanjui‚ M.N2‚ Kwanza‚ J.K2 Taita Taveta University College Jomo Kenyatta University of Agriculture and Technology *Corresponding author E-mail: nicholasmuthama@ttuc.ac.ke 2 1 Abstract In this paper‚ a magnetohydrodynamic convection flow of an electrically conducting heat generating fluid past a semiinfinite vertical porous plate with variable suction is considered. The fluid flow
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“Volcanic and seismic events are major pieces of evidence towards proving that plate tectonics theory is valid’ Discuss the extent to which you agree with this statement (40 marks) The plate tectonics theory was made by a German named Alfred Wegener. He stated that a single continent existed about 300 million years ago named Pangaea and that it split into two continents of Laurasia in the north and Gondwanaland in the south. Today’s continents were formed by further splitting of the two masses
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pieces of evidence towards proving that the plate tectonic theory is valid” Discuss the extent to which you agree with this statement (40). The theory of plate tectonics explains the structure and motion of the Earth’s lithosphere. The theory states that the Earth’s crust is split into large sections called tectonic plates‚ and these move relative to one another creating boundaries at which the plates converge‚ diverge or move past each other. These plates are either continental or oceanic and are
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The natural hazards caused by plate tectonics are more a result of human factors than physical ones. Discuss to what extent do you agree with this statement? [40 marks] A natural hazard is a threat of a naturally occurring event that will have a negative effect on people or the environment. The Earth’s lithosphere (crust) is divided into tectonic plates which are constantly in motion due to the convection currents caused by heat cycles in the mantle‚ driven by radioactive decay in the Earth’s core
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To do this‚ following instructions on page 104 in the Microbiology Lab Manual‚ molten agarose was poured into a casting tray where it remained for solidification. Once solidified‚ 300 ml of a buffer was added‚ this is so the electrical field has something to pass through. Next‚ each person pipetted 5 microliters
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identified as Staphylococcus simulans. As for the identification of the unknown Gram-negative bacterium‚ the unknown bacterium’s ability to ferment lactose was analyzed first. Positive lactose fermentation was indicated on both the MacConkey agar plate and SSA by the growth of bright pink colored colonies (Table 2; Kenyon College‚ 2011; Lancaster and Bennett‚ 2012). Identical results were also found in the inoculated lactose broth with the Durham tube and the TSI tests‚ which both indicated positive
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fermentation‚ but have mechanisms to protect themselves from oxygen. Faculatative anaerobes prefer to grow in the presence of oxygen‚ using oxidative phosphorylation‚ but can grow in an anaerobic environment using fermentation. (Fundementals of Microbiology p. 105) Oxygen utilization is a primary diagnostic tool when identifying microorganisms. Special media has been developed for the purposes of determining the oxygen relationship and method of fermentation vs. respiration of microorganisms. One
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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 isolated two different bacterial species by examining my MAC and CNA plates. Only one type of colony had grown on my MAC plate indicating a gram negative species‚ which I chose to
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order to thrive. In the lab‚ we use a Biological Media to aid in growth reproduction. Also referred to as a culture medium‚ a Biological Media is a substance used to support the growth of microorganisms. The two types of media most commonly used in Microbiology are selective media and differential media. Selective media are used to encourage the growth of specific or desired microbes. Differential media on the other hand are used to distinguish colonies of microbes as well as identify different bacteria
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Cited: Arvidson‚ C. (n.d.). Cultivation Media for Bacteria. Retrieved December 3‚ 2014‚ from http://learn.chm.msu.edu/vibl/content/differential/ Carson‚ V. (2013). Microbiology Lab (1st ed.). Department of Cell Biology‚ Microbiology & Molecular Biology. University of South Florida. Slonczewski‚ J.‚ & Foster‚ J. (2013). Microbiology: An evolving science (Third ed.). W. W. Norton. U.S Food and Drug Administration. (2014‚ October 7). BBB - Yersinia enterocolitica. Retrieved November 28‚ 2014‚ from
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