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Would omitting NaCl alter the medium's specificity or sensitivity?
Wiki User
∙ 14y ago
The answer is Yes, only if this is in reference to a selective and/or differential medium. Specificity is the ability of the test to identify negative results while sensitivity is the ability of a test to detect positive results. So, if taking out the NaCl effects your ability to interpret your data results then it in someway has effected your sensitivity and specificity.
Wiki User
∙ 12y ago
Wiki User
∙ 14y agoThe medium's sensitivity would be altered since the NaCl would lose its H+ ion. Without it, the molecule would be incomplete.
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Would a change starting at a pH of 7.8 alter the EMB medium's sensitivity or specificity?
Eosin methylene blue agar (EMB) is a selective and differential medium used to isolate fecal coliforms. Eosin Y and methylene blue are pH indicator dyes which combine to form a dark purple precipitate at low pH; they also serve to inhibit the growth of most Gram positive organisms. Sucrose and lactose serve as fermentable carbohydrate sources which encourage the growth of fecal coliforms and provide a means of differentiating them. If the pH is changed (even at the beginning) the test might be ''read" incorrectly and the improper medication will be given. Always follow instructions for this reason.
What are the usp limits for the theoretical plates in gas chromatography?
There is no "limit" set by the USP, it depends on the molecules and what is reasonable. For example in HPLC, 2000 plates is typically what you would like to shoot for but if its a compound with low sensitivity and you need to see low levels you might inject more compound which would increase sensitivity but also probably affect peak shape and thus theoretical plates. The answer is it depends
What is the pH of a 0.067 M aqueous solution of sodium propionate NaC3H5O2?
propionic acid's pka = 4.87Since the starting material is a complete salt and not a mixture of its conjugate acid, the following ICE table (initial/change/equilibrium) should be set up in this manner:Sodium priopionate indicates that it will deprotonate water, leaving -OH behind and making it basic.Generic equation: A- --> HA + -OHC3H5O2 --> H-C3H5O2 + -OHpH = 8.848The error from omitting x earlier would be100% x (7.047 x 10^-6)/0.067 = ~0.01 %
What compound is CCl2H2?
C2H is the formula of ethynyl radical.It is a molecule that is not found on Earth. It exists in the interstellar mediums, which is in space, between the star systems of galaxies.
What would happen to the oral cavity if the pH of saliva is acidic?
If the pH of the saliva is acidic it demineralizes (break down) the tooth enamel. When this happens, it causes a thinning of the enamel exposing the dentin, bone-like containing microscopic tubules that lead right to the pulp where the nerves are. If the tooth enamel is eroded, consuming hot, cold, or sugary drinks can become quite painful. Symptoms of acidic or unbalanced saliva pH levels are: bad breath, sensitivity to hot and cold, and cavities
Would a change in starting pH alter the mediums sensitivity or specificity Explain?
Yes, it would. Most microbes grow best at what is called an optimum temperature and pH. If the pH is not at the optimum, the microbe may grow slowly or perhaps not at all.
How would removing the crystal violet from MacConkey agar alter the sensitivity and specificity of the medium?
It would allow growth of Gram-positive cocci.
Would a false positive from the reaction between the inoculating loop and hydrogen peroxide be caused by poor specificity or poor sensitivity of the catalase test system?
The false positive from the reaction of hydrogen peroxide and the inoculating loop would be caused by poor specificity. The formula for specificity is TN/TN+FP.
Would a false positive from the reaction between the inoculating loop and hydrogen peroxide be caused by poor specificity or poor sensitivity of the test system?
no
Would a false positive from the reaction between the inoculation loop and hydrogen peroxide be caused by poor specificity or poor sensitivity of the test system?
no
Would a false negative result for the VP test more than likely be attributed ti poor sensitivity or to poor specificity of the test system?
False negatives in a voges-proskauer test would be due to poor sensitivity.
Would a change starting at a pH of 7.8 alter the EMB medium's sensitivity or specificity?
Eosin methylene blue agar (EMB) is a selective and differential medium used to isolate fecal coliforms. Eosin Y and methylene blue are pH indicator dyes which combine to form a dark purple precipitate at low pH; they also serve to inhibit the growth of most Gram positive organisms. Sucrose and lactose serve as fermentable carbohydrate sources which encourage the growth of fecal coliforms and provide a means of differentiating them. If the pH is changed (even at the beginning) the test might be ''read" incorrectly and the improper medication will be given. Always follow instructions for this reason.
You would want the highest sensitivity you can get.?
You would want the highest sensitivity you can get.
What would be unlikely to contribute to the substrate specificity of an enzyme?
The allosteric site is distinct from the active site, and does not affect the substrate specificity of the enzyme
High sensitivity would work better?
High sensitivity would work better
What is specificity theory?
Specificity theory proposes that a particular type of sensory receptor corresponds to a specific sensation. According to this theory, the quality of a sensation is determined by the specific type of sensory receptor that is activated. This theory contrasts with the pattern theory of sensory perception, which suggests that the quality of sensation is determined by the pattern of activity across different types of receptors.
What is a sentence using the word specificity?
What specific word would you use in the sentence? There was a specific procedure for changing the exterior bulbs. He would only answer specific questions about the project.
