This team designed the study, developed or selected existing study instruments and analytical methods, and analyzed and interpreted the results.
The instruments and analytical methods used for DNA histogram construction and the criteria for diagnosis of aneuploidy may also affect the results.
Over the past 100 years, instruments and analytical methods have been developed to measure the impedance properties of biological specimens and to utilize these measurements in both clinical and basic science settings.
However, reliable data appeared with the development of advanced instruments and validated analytical methods, especially after 1970 (Drbal et al. 1975a, b; Stijve and Besson 1976; Byrne et al. 1976; Bakken and Olsen 1990; Falandysz et al. 2001).
Details on the sample preparation, analytical methods, instruments, and quality assurance measures are given in Additional file 1.
As a result of recent efforts and improvements in analytical methods and instruments, our estimates of invertebrates and protists, in particular, have undergone an upward revision in recent years.
Analytical methods, using such instruments as the microscope and the spectroscope, became increasingly important; the latter instrument, which analyzes by wave length the light radiation given off by incandescent substances, began to be used to identify the composition of chemical substances and stars.
Scientifically qualified and properly maintained instruments should be used for implementation of analytical methods in routine dose formulation analysis.
The performance of an instrument or an analytical method is assessed by determining LoD and LoQ.
Given fit to the Rasch model, ordinal data from an instrument can be converted into an interval scale, and parametric analytical methods can be used [ 29].
