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The tip of the instrument is placed with light pressure of 10-20 grams [1] into the gingival sulcus, which is an area of potential space between a tooth and the surrounding tissue. It is important to keep the periodontal probe parallel to the contours of the root of the tooth and to insert the probe down to the base of the pocket. This results ...
[12] [failed verification] These probes are also called resistive divider probes, since a 50 ohm transmission line presents a purely resistive load. The Z 0 name refers to the characteristic impedance of the oscilloscope and cable. The matched impedances provide better high-frequency performance than an unmatched passive probe can achieve, but ...
The following conditions need to be fulfilled in the establishment of repeatability: [2] [4] the same experimental tools; the same observer; the same measuring instrument, used under the same conditions; the same location; repetition over a short period of time. same objectives; Repeatability methods were developed by Bland and Altman (1986). [5]
The date and time, or more often the number of the control run, is plotted on the x-axis. A mark is made indicating how far the actual result was from the mean, which is the expected value for the control. Lines run across the graph at the mean, as well as one, two and three standard deviations to either side of the mean.
A calibration curve plot showing limit of detection (LOD), limit of quantification (LOQ), dynamic range, and limit of linearity (LOL).. In analytical chemistry, a calibration curve, also known as a standard curve, is a general method for determining the concentration of a substance in an unknown sample by comparing the unknown to a set of standard samples of known concentration. [1]
Due to the microprocessor control and a number of interfaces, automatic refractometers are able to communicate with computers or other measuring devices, e.g. density meters, pH meters or viscosity meters, to store refractive index data and density data (and other parameters) into one database.
In number theory, a Williams number base b is a natural number of the form () for integers b ≥ 2 and n ≥ 1. [1] The Williams numbers base 2 are exactly the Mersenne numbers. A Williams prime is a Williams number that is prime. They were considered by Hugh C. Williams. [2] It is conjectured that for every b ≥ 2, there are infinitely many ...
The tag allows any DNA fragments containing complementary sequences with the DNA probe sequence to be visualized within the Southern blot. [1] The Southern blotting combines the transfer of electrophoresis-separated DNA fragments to a filter membrane in a process called blotting, and the subsequent fragment detection by probe hybridization. [2]