Membrane filtration allows only the microbes that are of a specific size to pass through. If the diameter of the membrane filter is made so narrow that only a single microbe can pass through it, then by placing a laser each microbe can be counted by using the membrane filter while it passes through the filter. In this way there is no use of spectrophotometer.
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What are some reasons you might use membrane filtration to determine how many microbes you have...
4. What are some reasons why you might want to use a genetically correlated trait instead of the trait you are truly interested in (e.g., the economically relevant trait)?
You have decided to determine how many microbes are living on the lettuce in the salad bar at your favorite restaurant. You place 5 grams of lettuce and 45 ml of water in a blender and blend the mixture. This is sample A. You next make a 1/10 dilution of sample A. This becomes sample B. You then transfer 1 ml of this dilution (sample B) into to another that contains 4 ml of water. This is sample C. Next...
what are some reasons that the Trail cameras might have captured some spaces more often than others species?
What is the primary method used by microbes to have water cross the membrane? Choose one: A. pumps B. Membranes do not allow water into or out of cells. C. diffusion D. pinocytosis E. aquaporins Which of the following is the best example of an extremophile? Choose one: A. the facultative anaerobe Bacillus cereus B. the Gram-negative plague-causing bacteria Yersinia pestis C. the hyperthermophile bacteria Methanopyrus kandleri D. the barotolerant bacterial strain DSK1 Of the reactions that involve reactive oxygen...
The Absorbance for the highest concentration of starch is lower than you might have expected. What is the most likely reason for this? The sample was prepared incorrectly and actually has a lower starch concentration than indicated. Not enough Lugols was added, and not all of the starch is being detected. The measurement was made inaccurately, and the Absorbance is probably higher than indicated. Spectrophotometer readings are inaccurate near their maximum value of 2. You have series of starch solutions...
A, What does the UV-Vis spectrophotometer measure? What is Beer’s Law (you might have to look it up) and how does it relate to data collected from a spectrophotometer? B, What is a sample blank? What it is it used for in this experiment? C, What does the addition of NH3(aq) do to the copper(II) solution? If you don’t know because you haven’t yet done the experiment, make an educated guess. (Think about what the NH3 does chemically and what...
What are some of the reasons that an organization may use more than one pay structure? How might this be beneficial? Are there any drawbacks?
For what reasons might a doctor recommend that a woman under age 35 have an amniocentesis? What are the risks involved in this procedure? How might the doctor and mother determine whether amniocentesis is the right choice during the course of the pregnancy?
What would be some reasons as to why a bacterial growth curve would produce unexpected results? For example, an E. coli culture increases after the stationary phase? Or why there is no stationary phase? I am trying to interpret results that I have from a lab experiment. Viable Cell Concentration vs. Time of Escherichia coli E 1.00E+08 1.00E-07 C 1.00E+06 60 80 100 120 140 0 20 40 Time (minutes) Spectrophotometer -96 Well Plate
Number 11# 11. Why might one expect managers to act in shareholders' interests? Give some reasons. 12. Many firms have devised defenses that make it more difficult or costly for other firms to take them over. How might such defenses affect the firm's agency problems? Are managers of firms with formidable takeover defenses more or less likely to act in the shareholders interests rather than their own? What would you expect to happen to the share price when management proposes...