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  2. McFarland standards - Wikipedia

    en.wikipedia.org/wiki/McFarland_standards

    A 0.5 McFarland standard is prepared by mixing 0.05 mL of 1.175% barium chloride dihydrate (BaCl 2 •2H 2 O), with 9.95 mL of 1% sulfuric acid (H 2 SO 4). [ 1 ] Now there are McFarland standards prepared from suspensions of latex particles, which lengthens the shelf life and stability of the suspensions.

  3. List of United States Army Field Manuals - Wikipedia

    en.wikipedia.org/wiki/List_of_United_States_Army...

    FM 100–5, Operations of Army Forces in The Field (with included Change No. 1) 17 December 1971 [22] This manual supersedes FM 100–5, 19 February 1962, including all changes. W. C. Westmoreland: INACTIVE: FM 100–5: FM 100–5, Operations of Army Forces in The Field: 6 September 1968 [23] This manual supersedes FM 100–5, 19 February 1962,

  4. Modal testing - Wikipedia

    en.wikipedia.org/wiki/Modal_testing

    Modal impact hammer with interchangeable tips and accompanying temporal and frequency responses. An ideal impact to a structure is a perfect impulse, which has an infinitely small duration, causing a constant amplitude in the frequency domain; this would result in all modes of vibration being excited with equal energy.

  5. Energy charge - Wikipedia

    en.wikipedia.org/wiki/Energy_charge

    Daniel Atkinson showed that when the energy charge increases from 0.6 to 1.0, the citrate lyase and phosphoribosyl pyrophosphate synthetase, two enzymes controlling anabolic (ATP-demanding) pathways are activated, [2] [3] while the phosphofructokinase and the pyruvate dehydrogenase, two enzymes controlling amphibolic pathways (supplying ATP as ...

  6. Obligate aerobe - Wikipedia

    en.wikipedia.org/wiki/Obligate_aerobe

    They can be found evenly spread throughout the test tube. An obligate aerobe is an organism that requires oxygen to grow. [ 1 ] Through cellular respiration , these organisms use oxygen to metabolise substances, like sugars or fats, to obtain energy.

  7. Usability testing - Wikipedia

    en.wikipedia.org/wiki/Usability_testing

    Hallway testing, also known as guerrilla usability, is a quick and cheap method of usability testing in which people — such as those passing by in the hallway—are asked to try using the product or service. This can help designers identify "brick walls", problems so serious that users simply cannot advance, in the early stages of a new design.

  8. Effect size - Wikipedia

    en.wikipedia.org/wiki/Effect_size

    In statistics, an effect size is a value measuring the strength of the relationship between two variables in a population, or a sample-based estimate of that quantity. It can refer to the value of a statistic calculated from a sample of data, the value of a parameter for a hypothetical population, or to the equation that operationalizes how statistics or parameters lead to the effect size ...

  9. Accuracy class - Wikipedia

    en.wikipedia.org/wiki/Accuracy_class

    Class 0.5 is an ANSI C12.20 accuracy class for electric meters with absolute accuracy better than ± 0.5% of the nominal full scale reading. [ 1 ] Typically, a class specifies accuracy at a number of points, with the absolute accuracy at lower values being better than the nominal "percentage of full scale" accuracy.

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