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formation and motility in Gram negative bacteria. We will be adding a couple of drops of Kovacs reagent following the incubation of the unknown organism. The indole combines with the reagent and if positive it produces a red layer on top of the medium. If the medium has a hazy growth throughout, then is positive for motility and if it produces Hydrogen Sulfide (H2S) a black precipitate is produced. Some bacteria can produce large amounts of stable acids and others produce a smaller amount. In…

Streptomyces and Antibiosis From our group, Group 2, nutrient agar plates inoculated with E. Coli, (Images 1.1,1.2), (Images 2.1,2.2), (Images 3.1,3.2) no antibiotic activity was detected. This could be a result of the putative colonies chosen, not being Streptomyces. All selected colonies were white, or pigmented rink, raised and rough. One (1) and three (3) were inoculated with the putative Streptomyces colonies. Plate 2 was inoculated with the control Streptomyces colony. Although it was…

Stars are complex and giant balls of matter that have many things to understand about. Stars are born of gas and dust and have a life cycle based on their original mass. All stars start out in their main sequence, but the first difference between the mass of stars is when they stop producing energy. The low-mass stars become giant, and the high-mass stars become super giant. For low-mass, the star then becomes a planetary nebula, then finally a white dwarf. High-mass stars become a supernova, a…

Scientists use different types of nutrient agar media to help with the study of microorganisms. The purpose of this experiment was to examine the different growths of minority organisms within a variety of media cultures. These cultures included types of selective, differential, and enriched media and were applied to split sections on the agar plate. Each of the four broth cultures: Escherichia coli, Enterobacter aerogenes, Staphylococcus epidermidis, and Streptococcus faecalis showed observable…

Introduction: Sampling the microbial content of the environment is a recommended practice for hospitals and clinics. Information obtained by environmental sampling has great value in the evaluation of problems relating to housekeeping procedures, disinfectants, air distribution and filtering, traffic control and the influence of specific equipment on environmental contamination. The purpose of this practical is to assess the effectiveness of some cross-infection control measures commonly…

containing 9mL water using a pipette. Four MSA and four PEA plates were used for isolation. PEA plate number 1 was divided into three parts and was used to isolate all of the samples obtained from the skin by rolling the cotton swabs on the surface of the medium. PEA plate number…

Cream may have the potential for use as a probiotic carrier because it provides an excellent environment for probiotic bacteria, with the added advantage of having nutritional value.Fatty Acids composition in fermented synbiotic cream, containing one of the two probiotic bacteria ( Lactobacillus acidophilus, Lactobacillus casei ) and inulin (0,1.5, 3%) was evaluated during 30 days for the the15-day interval at 4±1 °C. All chemical characterization were affected by the probiotic bacteria strain…

This medium is able to successfully engage its audience throughout the video, which is a strength that is harder to maintain in something such as long-form journalism where the majority of it is written word. Also, a major strength and defining characteristic…

Aaminah Azhar Astrobiology Spring 2015 Test 1 1. Name and describe five important steps in the formation of planets based on our current scientific understanding. a) Star and planet formation starts inside a collapsing cloud of gas and dust inside a bigger cloud called a nebula. Because of gravity pulling materials in the collapsing cloud closer together, the center of the cloud gets increasingly more compressed and because of this get hotter. The dense hot core of this collapsing cloud becomes…

Planetary, supernova, dark, and reflective are all types of nebulae that are formed and act differently. The elements found in the planetary nebulae and supernovas. A scientist has found that in the permitted lines of planetary nebulae there are nitrogen ions (Aller). Permitted lines are only found with a high power telescope; this shows that there are more possibilities of other elements within these clouds. The elements that are mostly know in Planetary nebulae are the common “hydrogen,…