摘要:
Techniques for gas analysis using a parallel dipole line (PDL) trap viscometer are provided. In one aspect, a gas analysis system is provided which includes: a PDL trap including: a pair of diametric cylindrical magnets, and a diamagnetic rod levitating above the magnets; and a motion detector for capturing motion of the diamagnetic rod. The motion detector can include a digital video camera positioned facing a top of the PDL trap so as to permit capturing video images of the diamagnetic rod and the system can include a computer for receiving and analyzing video images from the video camera. Methods for measuring gas viscosity and pressure using the PDL trap system are also provided.
摘要:
A process allowing measuring of viscosity of a culture medium of microorganisms including a) immersing at least one particle that is charged electrically, is magnetic or can be magnetized or covered with at least one magnetic or magnetizable layer in the culture, b) subjecting the culture to an electrical, magnetic or electromagnetic field in such a manner as to put the particle in motion, and c) optically detecting the degree of freedom of motion of the particle in the culture without a scanning microscope.
摘要:
A means for simultaneous determination of the radial and angular vectors of rotary motion of a body relative to a single reference axis, by measurement of the common aid differential states of three position detectors and, together with an axial position detector, thus to allow the measurable modulation of magnetic devices such as to provide measurable vector forces to support that body against the vector effects of any external forces that tend to change its position relative to the reference axis, in the absence of any contact between the rotor and the combined system of sensors and magnetic devices.
摘要:
The process for measuring viscosity relies on the observation of the relaxation of a sample drop (A) initially flattened between two plates (7,8), normally without any contact with them due to a gas layer blown through their opposite faces (10, 11); one correlates the observed phenomenon with a relaxation model fitting each portion of the measurement curve so as to estimate concurrently the viscosity and the shear rate, then the sensitiveness of the viscosity to the shear rate by compiling the said portions. The proposed viscometer includes a variable magnetic field generator (16) to produce, using a removable screen (18), various stirring and shears in the sample (A).
摘要:
A method and a pump apparatus are provided for the generation of an adjustable, substantially constant volume flow of a fluid by means of a pump apparatus, wherein the fluid (5) is forwarded by the pump apparatus (1) from a reservoir (2) into a flow connection (4). A rotary pump (1) is used as the pump apparatus and the rotary pump (1) is operated at an efficiency which is less than half the maximum efficiency (nullmax) of the rotary pump (1).
摘要:
A method and a pump apparatus are provided for the generation of an adjustable, substantially constant volume flow of a fluid by means of a pump apparatus, wherein the fluid (5) is forwarded by the pump apparatus (1) from a reservoir (2) into a flow connection (4). A rotary pump (1) is used as the pump apparatus and the rotary pump (1) is operated at an efficiency which is less than half the maximum efficiency (&eegr;max) of the rotary pump (1).
摘要:
To measure characteristics of a non-Newtonian fluid, preferably blood, a non-magnetic container is provided for receiving the fluid. A magnetic body is contained in the container, and a winding is provided around the container. An AC current supplying device is connected to the winding for supplying input AC current of different amplitudes thereto to generate magnetic fields of different strengths in the container to cause the magnetic body to oscillate at different shear rates in the fluid. A measuring device is provided for measuring amplitude and/or phase of the oscillations of the magnetic body and a shear rate determining device is provided for determining the shear rates by measuring differences between the amplitude and/or phase of the oscillations of the magnetic body and the amplitude and phase of the input AC currents. The amplitude difference at a specific shear rate is proportional to the viscosity of the fluid, and the phase difference at a specific shear rate is proportional to the viscoelasticity of the fluid.
摘要:
A lightweight absorbent foam is produced using a high internal phase emulsion (HIPE), the production of which incorporates the use of capillary viscosity measurements as an in-line diagnostic for HIPE quality. The in-line diagnostics yield measurements of viscosity slope and amplitude. These measurements offer several advantages for monitoring emulsion quality, including stable high resolution measurement of hardware-independent parameters of the whole flow, without the need for sampling.
摘要:
Apparatus and method for determining the viscosity of a liquid sample, comprising supporting a quantity of the sample with a surface thereof exposed to the ambient atmosphere, placing a magnetic wafer on the sample surface, for support thereon, generating a rotating magnetic field about the center of the wafer to spin the wafer on its center, and monitoring the rate of rotation of the wafer as an indication of the viscosity of the sample. Further applications include detecting a change in the viscosity of a sample and determinations of Prothrombin Time and Partial Thromboplastin Time of blood specimens, and various other uses where the end point of a reaction in a sample mixture is evidenced by a change of viscosity.
摘要:
The present invention relates to devices for measuring property changes via in-situ micro-viscometry and methods of using same. The aforementioned device is inexpensive and can be used to quickly and accurately measure numerous physical and chemical property changes, including but not limited to the rate of chemical cure, change in tack, and rate of mass loss, for example, rate of moisture, solvent and/or plasticizer change.