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Low complexity regions in proteins can be computationally detected from sequence using various methods and definitions, as reviewed in. [2] Among the most popular methodologies to identify LCRs is by measuring their Shannon entropy. [1] The lower the value of the calculated entropy, the more homogeneous the region is in terms of amino acid content.
Laboratory quality control is designed to detect, reduce, and correct deficiencies in a laboratory's internal analytical process prior to the release of patient results, in order to improve the quality of the results reported by the laboratory.
The ligase chain reaction (LCR) is a method of DNA amplification. The ligase chain reaction (LCR) is an amplification process that differs from polymerase chain reaction (PCR) in that it involves a thermostable ligase to join two probes or other molecules together which can then be amplified by standard PCR cycling. [ 1 ]
An LCR meter is a type of electronic test equipment used to measure the inductance (L), capacitance (C), and resistance (R) of an electronic component. [1] In the simpler versions of this instrument the impedance was measured internally and converted for display to the corresponding capacitance or inductance value.
A regression line is calculated through least squares analysis and the x-intercept of the line is determined by the ratio of the y-intercept and the slope of the regression line. This x-intercept represents the silver concentration of the test sample where there is no standard solution added.
In NMR spectroscopy, e.g. of the nuclei 1 H, 13 C and 29 Si, frequencies depend on the magnetic field, which is not the same across all experiments. Therefore, frequencies are reported as relative differences to tetramethylsilane (TMS), an internal standard that George Tiers proposed in 1958 and that the International Union of Pure and Applied Chemistry has since endorsed.
Second step is to measure absorbance (A’) of unknown solution and match it with the known absorbance-concentration plot of the standard solution. Thereby calculating the molar concentration of the unknown solution. This is calculated by using the formula, concentration of unknown =A’/(E*l). This can also be calculated using this given ...
The results from AMS testing are in the form of ratios of 12 C, 13 C, and 14 C, which are used to calculate Fm, the "fraction modern". This is defined as the ratio between the 14 C / 12 C ratio in the sample and the 14 C / 12 C ratio in modern carbon, which is in turn defined as the 14 C / 12