Homework Answers
Ans: lac+ bacteria like lactobacillus can ferment lactose present in the milk and form lactic acid.These bacteria are used to make fermented dairy products like cheese and yogurt. They are also used as probiotics. Although they can also cause souring of the raw milk. Hence it will be useful to evaluate the number of lac+ colonies in the milk sample.
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in general why is it useful to estamate the number of lac+
colonies in the milk...
first two pictures are what is to be answered, and the bottom four are the results...
first two pictures are what is to be answered, and the bottom
four are the results used to answer them.
thats all the infor given
We were unable to transcribe this images this the result In the original milk sample, only a proportion of the micro organisms that grew on the milk agar plates also grew on the Deoxycholate plates. What proportion is this? Was this there expected? Give a brief explanation of your answer. 3. What proportion of the...
Data Table 1. Food Safety Culture Results. Plate Section Number of Total Colonies Types of Microbes...
Data Table 1. Food Safety Culture Results. Plate Section Number of Total Colonies Types of Microbes Milk Fresh Milk Opened 1 Lettuce Washed Lettuce 70 Unwashed Data Table 2. Photograph of Developed Plates. Photograph Questions: Why is food safety important? 1. 19
Data Table 1. Food Safety Culture Results. Plate Section Number of Total Colonies Types of Microbes...
Data Table 1. Food Safety Culture Results. Plate Section Number of Total Colonies Types of Microbes Milk Fresh Milk Opened 1 Lettuce Washed Lettuce 70 Unwashed Data Table 2. Photograph of Developed Plates. Photograph Questions: Why is food safety important? 1. 19
The data in the Tollowing table are the frequency counts for 40o observations on the number of bacterial colonies within the field of a microscope, using samples of milk film. Is there sufficient...
The data in the Tollowing table are the frequency counts for 40o observations on the number of bacterial colonies within the field of a microscope, using samples of milk film. Is there sufficient evidence to claim that the data do not fit the Poisson distribution? (Use a-0.05.) State the null and alternative hypotheses. O My The data fit a Poisson distribution. The data do not fit a Poisson dstribution. O Mo The data do not fit a Poisson distribution. The...
8. You are testing a sample of milk from a New York dairy that has been...
8. You are testing a sample of milk from a New York dairy that has been cited for some recent safety violations. Your 10-2 final dilution plate has 201 colonies on it. One milliliter was pipetted onto the plate. The FDA safety standard for milk of the type you sampled is 3 X 10' cells per milliliter. Is this milk sample safe to drink? Why or why not?
your lab manual for instructions, Sample plated Number of colonies on plate TMTC 430 4th plate...
your lab manual for instructions, Sample plated Number of colonies on plate TMTC 430 4th plate 5th plate 6th plate 75 Which plate has the countable number of colonies? What is the dilution factor that produced that plate? • What is the correction factor for the volume? How many cfu/ml are in the culture, based on your calculations? 4. Suppose you plated 1 ml of a 10-7 dilution (tenfold dilutions) of a bacterial broth culture
What is the purpose of the mordant? Increases the number of colonies grown during incubation Dilutes...
What is the purpose of the mordant? Increases the number of colonies grown during incubation Dilutes the sample Iodine complexes the crystal violet to the peptidoglycan layer All of the above
If a plate with a final dilution of 10-7 produces 75 colonies, calculate the number of...
If a plate with a final dilution of 10-7 produces 75 colonies, calculate the number of colony- forming units per milliliter.
(5 points) A milk processor monitors the number of bacteria per milliliter in raw milk received...
(5 points) A milk processor monitors the number of bacteria per milliliter in raw milk received at the factory. A random sample of 10 one-milliliter specimens of milk supplied by one producer gives the following data (assume the population is Normal): 5370 4890 5100 4500 5260 5150 4900 4760 4700 4870 Construct and interpret a 90% confidence interval for the population mean μ.
1. Farmer Brown produces $100 worth of milk. He sells $40 worth of the milk in...
1. Farmer Brown produces $100 worth of milk. He sells $40 worth of the milk in the market and uses the rest to feed his pigs, which he sells in the market for $120. What is Farmer Brown's contribution to the nation's GDP? 2. In terms of the labor force, everyone who is at least 16 years old falls into one and only one of these three categories 3. In 2004, based on concepts similar to those used to estimate...
first two pictures are what is to be answered, and the bottom
four are the results used to answer them.
thats all the infor given
We were unable to transcribe this images this the result In the original milk sample, only a proportion of the micro organisms that grew on the milk agar plates also grew on the Deoxycholate plates. What proportion is this? Was this there expected? Give a brief explanation of your answer. 3. What proportion of the...
Data Table 1. Food Safety Culture Results. Plate Section Number of Total Colonies Types of Microbes Milk Fresh Milk Opened 1 Lettuce Washed Lettuce 70 Unwashed Data Table 2. Photograph of Developed Plates. Photograph Questions: Why is food safety important? 1. 19
Data Table 1. Food Safety Culture Results. Plate Section Number of Total Colonies Types of Microbes Milk Fresh Milk Opened 1 Lettuce Washed Lettuce 70 Unwashed Data Table 2. Photograph of Developed Plates. Photograph Questions: Why is food safety important? 1. 19
The data in the Tollowing table are the frequency counts for 40o observations on the number of bacterial colonies within the field of a microscope, using samples of milk film. Is there sufficient evidence to claim that the data do not fit the Poisson distribution? (Use a-0.05.) State the null and alternative hypotheses. O My The data fit a Poisson distribution. The data do not fit a Poisson dstribution. O Mo The data do not fit a Poisson distribution. The...
8. You are testing a sample of milk from a New York dairy that has been cited for some recent safety violations. Your 10-2 final dilution plate has 201 colonies on it. One milliliter was pipetted onto the plate. The FDA safety standard for milk of the type you sampled is 3 X 10' cells per milliliter. Is this milk sample safe to drink? Why or why not?
your lab manual for instructions, Sample plated Number of colonies on plate TMTC 430 4th plate 5th plate 6th plate 75 Which plate has the countable number of colonies? What is the dilution factor that produced that plate? • What is the correction factor for the volume? How many cfu/ml are in the culture, based on your calculations? 4. Suppose you plated 1 ml of a 10-7 dilution (tenfold dilutions) of a bacterial broth culture
1. Farmer Brown produces $100 worth of milk. He sells $40 worth of the milk in the market and uses the rest to feed his pigs, which he sells in the market for $120. What is Farmer Brown's contribution to the nation's GDP? 2. In terms of the labor force, everyone who is at least 16 years old falls into one and only one of these three categories 3. In 2004, based on concepts similar to those used to estimate...
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