Erythromycin‚ Penicillin‚ and Ampicillin are affected by the bacteria Serratia marcescens. Our hypothesis is that Penicillin will have the largest ring of inhibition‚ the ring around the disk where the antibiotic has killed bacteria. We believe Penicillin will be the most common antibiotic that we have heard of. The materials we used to make this test possible consists of a sterile nutrient agar Petri dish‚ the bacteria Serratia marcescens‚ Erythromycin antibiotic disk‚ Ampicillin antibiotic disk‚ Penicillin
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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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Serratia marcescens is a gram-negative rod shaped bacteria that is ubiquitous in the environment. S. marcescens is a member of the genus Serratia‚ which is a part of the family Enterobacteriaceae (Herra 1). Currently 14 species of Serratia are recognized within the genus‚ eight of which are associated with human infection‚ S. marcescens being the most common clinical isolate and the most important human pathogen of the genus (Herra 1). Serratia marcescens is also particularly prevalent in hospital
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the effect of temperature change on the gene which codes for a red pigment called prodigiosin of bacterium Serratia marcescens is being tested. Serratia marcescens is usually found in soil and plants‚ and the accumulation of prodigiosin in the bacterial cells makes them appear red. Prodigiosin is produced only at certain temperatures‚ so by regulating the temperature in which Serratia marcescens is cultured‚ the optimum temperature for the most prodigiosin to be produced can be tested. Purpose
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Yeast Mutations due to Ultra-Violet Light Exposure Summary: Mutations have played one of the most important roles throughout life on Earth. Without genetic mutations there would not be the diversity of living species that we see today. Understanding how mutations work and how they are created is an important step in controlling and isolating genes for experimentation. In this experiment we tested the effects of Ultra-Violet light on growing single-celled yeast. We did this by first creating serial
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faster‚ and better. Next is how to take care of your skin. The sun is one cause of unhealthy skin. The sun’s rays contains ultra violet rays. The ultra violet rays burn your skin and can put you in a position to get skin cancer. One way to reduce the effect‚ and lessen the percentage of you getting cancer‚ you can put on sun screen whenever you are exposed to the light. The sunscreen provides a layer‚ that basically reflects the beams and also moistens your skin because you can’t burn wet skin
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Tetracycline and Chloramphenicol against Serratia marcescens By C. A. Bechdel Abstract The problem investigated was Serratia marcescens. We hypothesized that both Tetracycline and chloramphenicol will be effective against treating S. marcescens. The experiment was conducted with a single control group and two experimental groups. The experiment was replicated 8 times. The experiment showed that in testing the control group S. marcescens‚ chloramphenicol had a mean death zone of 30.9 mm +/- 2
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death‚ which was violet light. There wasn’t anybody else there‚ or [sic]any thing. There was just violet light- and a hum.” (Vonnegut 43) In this scene‚ he continues to “swing” through stages‚ back into life‚ until “he was in pre-birth‚ which was red light” (43). These two colors are a split complementary duo on the color wheel; they share a common hue‚ yet look quite different and carry distinct meanings. This speaks to the duality of birth and death. Vonnegut possibly chose violet light for death because
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Ultra Thin Cloak Can Match Any Background! In the Movie Predator there was an Alien that would uses a Cloaking Device that would hide the Alien in Plain Sight‚ But the effect is far from Perfect‚ due to its attempt to conceal itself is Thwarted from the distortion of Light bending around it. Now‚ Researchers built an Ultrathin “Invisibility Cloak” that Gets around the Problem of Light Bending by turning objects into Flat‚ Perfect mirrors. Invisibility Cloaks are Designed to bend light around an
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time shifts and vivid imagery in painting an evocative portrait of time’s passage and its impact upon the individual. Both “At Mornington” and “The Violets” explore the connection between past and present as well as Harwood’s quest for a form of self fulfilment and inner peace as an ideal spiritual state informed by past physical experiences. “The Violets” structures its emotional concern around the act of time’s passing itself rather than focussing on what it is time is passing by. Whilst Harwood
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