what is the difference between a selective and differential medium?
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Selective media generally selects for the growth of a desired organism, stopping the growth of or altogether killing non-desired organisms. Differential media takes advantage of biochemical properties of target organisms, often leading to a visible change when growth of target organisms are present.
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What is selective media? Allows the growth of some organisms while inhibiting the growth of others. What is differential media? Differentiates closely related organisms or groups of organisms based on the organism's biochemical characteristics.
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Both MRIs with contrast and without use this same method of scanning. The only difference is that the medium you are injected with during an MRI with contrast is magnetic. This makes detail in the soft tissue stand out, since the medium is absorbed by organs and tissue from the bloodstream.
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Allison D. What is the difference between a simple stain and a differential stain? A simple stain is (one dye) used to show that bacteria are present and what they look like as opposed to other matter and the background. A differential stain (uses two dyes) is used to seperate organisms into groups.
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a) A single ended input measures the voltage between the input channel high and low level ground common to all the inputs. ... b) A differential input measures the voltage between two individual inputs within a common mode range. The measurement is independent of the low level ground which makes it more immune to noise.
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The main difference is how "pure" these products are. The darker varieties contain minute amounts of other substances, called congeners. The clear varieties do not contain congeners. For clear liquors congeners are not generated in fermentation and distillation or they are removed with purification processes.
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Simmons' citrate agar is a selective and differential medium that tests for an organism's ability to use citrate as a sole carbon source and ammonium ions as the sole nitrogen source. It is used for differentiating gram-negative bacteria on the basis of citrate utilization.
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The only difference between the two is that the frequency of X-rays is very much higher than radio waves. If, on the other hand, the radio waves or X-rays are propagating through a medium other than the vacuum, their speed will generally be less than c and will depend upon the specific properties of the medium.
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A transmission densitometer measures the amount of light passing through film or any other transparent medium. A reflection densitometer measures the light reflected from a surface, usually paper.
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The key difference between chemically defined and complex media is that the chemical defined media contain an exactly known chemical composition while complex media contain an unknown chemical composition.
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A differential stain is a specific type of staining that allows for microbe identification, and distinguishing between cells in a mixed sample. This is very different from simple staining techniques that simply add color and contrast to a slide. Simple staining involves adding a basic, cationic dye to the organism.
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The difference between the two is that natural selection happens naturally, but selective breeding only occurs when humans intervene. ... Different varieties of plants and animals with desired characteristics can be developed by selective breeding. For example: cows that produce lots of milk.
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The main difference between media and medium in microbiology or any other is that the media is the plural form of medium whereas medium is the substance used to grow cells in microbiology. Liquid media, semi-solid media, and solid media are the three types of media classified based on the physical state of media.
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Chemically defined media is composed of exact amounts of chemically pure, specifically identified organic or inorganic components. ... Complex media is composed of organic materials that are not chemically pure and not specifically identified chemical components.
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Mannitol Salt Agar (MSA) This type of medium is both selective and differential. The MSA will select for organisms such as Staphylococcus species which can live in areas of high salt concentration (plate on the left in the picture below).
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The only difference is that, enrichment media is in liquid state, i.e. in a nutrient broth. And selective media is a semi solid. ... This is more lab stuff than clinical medicine but enrichment just encourages growth with nutrients while selective also has something to inhibit other pathogens.
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1) What is the difference between a direct stain and negative stain? A direct stain uses basic stains (positively charged), where the objective is to stain the bacterium itself. A negative stain is used to stain the background, but leave the bacteria unstained using an acid stain.