Experiment No. 03 Date: Name of the experiment: Aerobic plate count (APC) and total coliform count of supplied yogurt sample. Purpose: To determine the aerobic plate count and total coliform count of the supplied yogurt sample. Principle: Yogurt squeezed or extracted from milks are more or less acidic‚ depending on the product‚ the pH generally ranges from about 2.4-4.2 and contain sugar (4.7g)‚ fat
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1. EGG INOCULATION The fertile hen’s egg can be used to cultivate and propagate various types of viruses. Because of the ability to alter their tropism and to adapt to a new host species‚ many viruses become capable of growing in chick embryo tissues wherein they frequently attain a much higher concentration than in the tissues of the natural host. STRUCTURE OF AN EGG The extra-embryonic membranes of the chick embryo arise from three germinal layers: the endoderm‚ mesoderm and ectoderm
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Project 1: Antimicrobial Activity of Soil Isolates John Franklin Farrar Department of Biology and Microbiology and Biology Address BOX 22750 BOWEN HALL‚ RALEIGH‚ NC‚ 27607 Abstract: Isolation and characterization of microorganisms is a practice that aids in Increasing ones knowledge of a laboratory setting and it helps improve on Using sterile technique. Isolates of soil microbes can be categorized and Characterized based on a number of criteria ranging from gram-staining
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founded in 1990‚ established a Web site with the address . Which of the following actions would the United Parcel Service (UPS)‚ founded very many years ago‚ be entitled to bring against the Union of Public Speakers? | | | | | trademark dilution by blurring and trademark infringement |
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lactose. This makes the area rich enough for the E.coli bacteria to find it easy to adapt to the environment. Some of the methods that were used in part A were streak plating‚ viable plate counting‚ spread plating and serial dilutions. Streak plating involves continuous dilution of the bacteria spread over the surface of the Agar plate using the loop. As the bacteria space out‚ some multiply and form individual colonies over a period of time. When pure coloured strain of colonies are seen‚ it means
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Sacramento tap water reveals ion concentrations of various different dissolved minerals such as calcium (Ca2+) and magnesium (Mg2+). These concentrations are a result of mineral deposits in local lakes and rivers. Perma Pure‚ a gas conditioning products manufacturing company‚ simplifies the mechanism of ion exchange by explaining that water is a solvent that dissolves most ionic bonds when exposed to compounds ("The Mechanism of Ion Exchange"). Therefore‚ as tap water passes through rocks it will
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MINI CASE: R.K.MAROON COMPANY R.K. Maroon is a seed-stage web-oriented entertainment company with important intellectual property. RKM’s founders‚ all technology experts in the relevant area‚ are anticipating a quick leap to dot-com fortune and believe that their unique intellectual property will allow them to achieve a subsequent (year 3) $100‚000‚000 venture value with a one-time initial $2‚000‚000 in venture financing. In contrast‚ similar dot-commers in their niche are currently seeking
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tested in a spectrometer‚ the highest absorption rates were found to be at 503.7 nm (A=0.281) and 630.7 nm (A=0.270). This lead to the conclusion that the beverage contained red 40 and blue 1. To determine the concentration of the dyes a series of dilutions was prepared for both dyes and tested with the spectrometer. This data was converted into point graphs and a trendline was established. The slope of the trendline (y=mx) was then multiplied by the Absorbance of the associated dye to find the concentration
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protein of influenza viruses to sialic acid. The process requires the saturation of the surface of the virus with Abs. Stable neutralization - with time‚ Ag-Ab complexes usually become more stable (several hours) and the process cannot be reversed by dilution. Neither the virions nor the Abs are permanently changed in stable neutralization‚ for the unchanged components can be recovered. The neutralized virus can be reactivated by proteolytic cleavage. Stable neutralization has a different mechanism to
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Part 1 dilutions participated as a trail run to gather around the “full enzyme” that was used for the other parts of the experiment. Part 2 readings were in the time span of 10 minutes and the final results show a spontaneous increase in the first minutes of the absorbance readings. They then showed a steady reading towards the end of timing. The amount of enzyme is decreasing as the dilution occurred. The activity it catalyzes measures the amount of enzyme present in the reaction (Introduction to
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