0
Want this question answered?
Be notified when an answer is posted
Add your answer:
Earn +20 pts
Are their any negative numbers on a Fahrenheit temperature scale?
No, there are no negative numbers on the Fahrenheit temperature scale. The scale starts at 0 degrees Fahrenheit, which is the temperature at which a specific mixture of ice, water, and salt melts.
What is the difference in weight between a gallon of salt water and a gallon of fresh water?
salt water has more mass because of the added salt so salt is heavier :)
How much is 2400 milligrams of salt?
It is 2.4 liters of salt.
How much salt must be added to 60kg of a 20 percent solution of salt to increase it to 40 percent solution of salt?
20%
How many milligrams of salt must be added to 18 milligrams of a 20 percent salt solution to obtain a 35 percent salt solution?
this question is not hard to answer, but it does require that one make some assumptions. The simplest answer assumes that the 20% salt solution refers to per cent by mass. Thus: a 20% salt solution is one which contains 20 mg salt for every 100 mg solution where the solution consists of a mixture of 20 mg salt plus 80 mg water. A 35% salt solution would contain 35 mg salt for every 65 mg water. Now, assuming that all the water in 18 mg of a 20% salt solution remains in the final solution we see that 18 mg salt solution x 20 mg salt/100 mg salt solution gives 3.6 mg of salt; thus, there are 18 mg total solution - 3.6 mg salt = 14.4 mg water. So the final salt solution must be one that contains 14.4 mg water and enough salt to make it 35% salt by mass. Mathematically, this is written as Z mg salt/(Z mg + 14.4 mg water) = 35/100 This gives Z = 0.35*(Z + 14.4) or Z = 0.35*Z + 0.35*14.4 which is same as Z = 0.35*Z + 5.04 and 0.65*Z = 5.04 so Z = 5.04/0.65 = 7.75 mg total salt needed. We started with 3.6 mg salt, so we must add 7.75 -3.6 = 4.15 mg salt Check: 7.75 mg salt/(7.75 mg salt + 14.4 mg water) = 0.35 or 35% There you go! --assuming that much salt dissolves that amount of water!
Does micrococcus luteus grow on msa plates?
Micrococcus luteus is not commonly found on Mannitol Salt Agar (MSA) plates because M. luteus is not a halophilic bacteria that thrives in high salt conditions, which are present in MSA. However, it is always possible for environmental isolates to vary so it's best to perform a culture test to confirm its growth on MSA plates.
Does Saccharomyces cerevisiae ferment mannitol?
Mannitol salt agar inoculated with Micrococcus luteusshowing no fermentation of mannitol (pink medium). The colonies show a yellow pigment which is characteristic of M. luteus.
Can Klebsiella pneumoniae grow on Mannitol salt agar?
No, K. pneumoniae will not grow on Mannitol Salt Agar- gram negative organisms cannot grow on MSA, and K. pneumoniae is gram negative.
Does bacillus subtilis ferment acid from mannitol salt agar?
Bacillus subtilis typically does not ferment acid from mannitol salt agar as it lacks the enzymes needed for fermentation. Mannitol salt agar is mostly used to differentiate Staphylococcus species, which are capable of fermenting mannitol.
HOW do mannitol salt hook up to glycolysis?
Mannitol is not a substrate for glycolisis
What reaction does the enzyme involved in Mannitol-salt agar test mediate?
Mannitol salt agar is selective for gram positive bacteria, and differential for mannitol fermenters. Phenol red is the indicator containing the enzyme mannitol.
What ingredient makes mannitol salt selective?
the salt content
What will grow on mannitol salt agar besides staph?
Mannitol Salt Agar (MSA) is a selective/differential media that inhibits the growth of gram negative bacteria. Only a few bacteria can tolerate the 7.5% NaCl found within this media. The high salt content selects for Staphylococcus and a few salt tolerant enterococci. The presence of the sugar mannitol gives this media its differential properties. When mannitol is fermented (utilized by the bacteria) microorganisms release acidic byproducts that change the pH of the surrounding media. The pH change is indicated by a change in the pH indicator (phenol red) from pink to yellow.
Which ingredient in mannitol salt agar supplies carbon?
mannitol is a type of sugar, so it supplies the carbon in the MSA medium
What organisms do not grow on msa and mannitol?
Organisms that do not grow on Mannitol Salt Agar (MSA) are non-halophilic bacteria that are unable to tolerate high salt concentrations. Mannitol-fermenting bacteria are organisms that can ferment mannitol and grow on MSA, while non-fermenting bacteria will not grow.
Can enterobacter aerogenes grow on mannitol salt agar?
Enterobacter aerogenes is not typically a salt-tolerant organism and would not be expected to grow well on Mannitol Salt Agar, which contains a high concentration of salt. This medium is more selective for salt-tolerant organisms like Staphylococcus species.
Why is mannitol salt considered to be a differential media?
Mannitol salt agar is considered differential because it contains mannitol and a pH indicator that changes color based on the fermentation of mannitol by certain types of bacteria, such as Staphylococcus aureus. This allows for the differentiation of pathogenic Staphylococcus species from non-pathogenic ones based on their ability to ferment mannitol.
