Abstract: Methods, systems, and apparatus make a determination of a level of integrity of a sample of biomolecules. For example, the determination of the integrity of RNA in a sample may be done in a fast and reproducible manner, such that the user can be assured of accuracy of a test (e.g. quantitative polymerase chain reaction qPCR) on the sample and compare results of different samples. The determination of integrity of an RNA sample is performed by comparing a size profile to reference size profiles (degradation standards) obtained from degradation over different lengths of times. As the reference scale of the level of integrity is derived from the actual degradation that occurs in a sample, high accuracy, reproducibility, and efficiency is provided.

Abstract: Methods, systems, and apparatus make a determination of a level of integrity of a sample of biomolecules. For example, the determination of the integrity of RNA in a sample may be done in a fast and reproducible manner, such that the user can be assured of accuracy of a test (e.g. quantitative polymerase chain reaction qPCR) on the sample and compare results of different samples. The determination of integrity of an RNA sample is performed by comparing a size profile to reference size profiles (degradation standards) obtained from degradation over different lengths of times. As the reference scale of the level of integrity is derived from the actual degradation that occurs in a sample, high accuracy, reproducibility, and efficiency is provided.

Abstract: A single-phase step motor comprises a stator having a coil and a magnetic circuit composed of a core and a plate having a hole in which is disposed a rotor equipped with a permanent magnet. The plate has a slot in the area of the hole, whose width and the position of the axis line thereof are determined by the magnetic asymmetry of the stator poles, sufficient to produce required driving and positioning torques of the motor.

Abstract: A single-phase step motor comprises a stator having a coil, a core and a plate featuring a hole forming poles of the stator, and a rotor having a permanent magnet and a shaft. The rotor is installed in supports. The poles of the stator, which are magnetically asymmetric, are connected by straps. The rotor and the supports thereof are accommodated inside a capsule made as a body and a cover and placed in the hole of the plate. The capsule is provided with an external cylindrical boss coaxial with the rotor, whereas the body of the capsule is provided with a bearing flange which positions the rotor in relation to the poles of the stator.