The use of mixed methods is currently increasing in social science research since it emphasizes methodological pluralism‚ and provides a broader and more credible understanding of the research problem than the use of a single method (Tashakkori and Teddlie 2010). However‚ mixing methods for no good reason other than the sake of it can produce disjointed and unfocussed research‚ and can severely test the capabilities of researchers. I raise some cautionary issues in this paper by critiquing the methodology
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coli and mixed well. The slide was allowed to air dry. When it was completely dry‚ I passed the slide over the flame for 3 times to fix the cells to the slide. For the staining part‚ I put a drop of methylene blue onto the smear for 30 second‚ rinsed with water‚ blotted dry and observed the slide using oil immersion. Gram Stain For comparison purpose‚ I used two bacteria for this experiment. They are E. coli‚ a gram negative bacteria and Staphylococcus‚ a gram positive bacteria. I prepared
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The purpose of this experiment was to isolate and purify cholesterol from egg yolks. Two hard boiled egg yolks were twice extracted with diethyl ether and methanol‚ with the filtrate collected via vacuum filtration. Potassium hydroxide pellets were added to the filtrate‚ the ether was distilled off‚ and the mixture was saponified by reflux. The crude cholesterol was isolated through a series of ether extractions and aqueous washes; then the ether was dried with MgSO4 and removed by rotary evaporation
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tea on the growth of E. coli bacteria cultures Kierstin Barker‚ Melissa Bischak‚ Jackie Tyszkiewicz‚ Errin Enany September 25‚ 2012 Abstract: This study was carried out in order to investigate whether black tea has antimicrobial properties as stated in Steven Johnson’s The Ghost Map. If tea does have antimicrobial properties‚ then it could aid in warding off waterborne diseases. We believed that if black tea is steeped in boiled water‚ then the amount of bacteria exposed to this solution would
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The Trifle Isolation Have you ever felt as though you were alone? Susan Glaspell wrote a play called Trifles. The story tells of the untimely death of Mr. Wright and the subsequent investigation. The investigation is being overseen by the county attorney‚ the sheriff and Mr. Hale who have brought their wives along to retrieve Mrs. Wright’s personal effects from the home. Everyone suspects Mrs. Wright of the death. The story has many themes but the one that stands out to me is isolation. This unfortunate
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infections. In World War Two‚ many soldiers were dying from seemingly mild wounds and illnesses such as sore throats. Physicians felt helpless and were desperate to find effective ways to treat and save those afflicted. Successful mass-production techniques led to a large distribution of penicillin to those in the Second World War. This large distribution comforted soldiers and allowed their bodies to heal from wounds and from sicknesses. From this point on‚ infections became easier to treat and penicillin
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produces two molecules of ATP. Streptococcus uses anaerobic respiration which is less effective than aerobic. Even under ideal circumstances‚ Streptococcus will grow slowly. Reference: Anaerobic respiration. 2014. Retrieved on‚ September 8‚ 2014 from‚ anaerobicrespiration.net 2. The following graph shows the normal rate of reaction of an enzyme and tits substrate (blue) and the rate when an excess of competitive inhibitor is present (red). Explain why the graph appears as it does. On one
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to Humans‚ Retrieved February 8‚ 2013. This article was of interest because there are many bacteria that we encounter in our daily lives and it was informative to know that all bacteria is not bad. In fact‚ there needs to be a balance between the two and by educating yourself with the smallest amount of new information is very helpful. Humans rely on micro-organisms for a variety of things varying from health‚ welfare‚ food‚ and industrial products. Micro-organisms are microscopic organisms
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Many types of projects are possible when you are able to count bacteria. For example‚ you could count the bacteria in drinking water‚ fresh milk‚ old milk that is slightly sour‚ buttermilk‚ yogurt‚ mud puddle‚ lemonade‚ and many other things. Or you may want to know how fast Chlorox kills bacteria. If you add some Chlorox to a culture and count the surviving bacteria at suitable intervals you can plot killing the killing curve and determine whether the killing is single hit or higher order. It will
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Issues involved in mixing methods research Mixed methods research (MMR)‚ although in has been defined in several different ways (see Johnson at al); most explanations are consistent in that it is essentially characterised by the employment of both qualitative and quantitative elements in a single study. (Johnson‚ et al.‚ 2007‚ pp. 118-121; Niglas‚ 2000‚ pp. 9-10; Creswell & Plano Clark‚ 2010‚ p. 2; The concept of mixed methods developed from the idea of methodological triangulation. First
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