Abstract:
System and method for analyzing changes in a fluid flowing through a conduit, including defining at least one coordinate within said conduit, said conduit having a first plurality of slices, receiving at least one known value for at least one property of the fluid, measuring said fluid using magnetic resonance, determining at least one image from the measured fluid, the at least one image having a second plurality of slices for said at least one coordinate, determining a second set of values for said at least one property of said fluid, comparing the first set of values and second set of values for said at least one property to determine a difference value, checking deviation of the determined difference from a predetermined value for said fluid, and issuing an alert if the deviation is not substantially zero.
Abstract:
Some embodiments are related to a portable or stationary system for determining the quality of processed food product. The system can be hand handled by a user, located on a production line or placed a laboratory. The system can include a Nuclear Magnetic Resonance (NMR) spectrometer and a controller. The controller can be configured to: receive an NMR spectrum of the processed food product from the NMR spectrometer, identify a first peak related to a first component of the processed food product from the received NMR spectrum and determine the quality of the processed food product based on the identification. The controller may further configured to control parameters of the production line based on the determined quality.
Abstract:
L'invention concerne une méthode de suivi d'un procédé de raffinage d'une charge d'hydrocarbures, dans laquelle: a)on acquiert par RMN du proton un signal représentatif du temps de relaxation transversale des différentes espèces d'un effluent issu dudit procédé de raffinage, notamment un effluent contenant des espèces solides, b)on modélise le signal mesuré à l'aide d'une fonction mathématique comportant plusieurs composantes, chaque composante correspondant à une gamme de dynamique des espèces dudit effluent, c)on extrait à partir de chacune des composantes de la fonction mathématique: -le temps de relaxation transversale de chacune des composantes, -l'intensité de chacune des composantes, d)on détermine une valeur de paramètre caractéristique dudit effluent à partir d'au moins une intensité déterminée à l'étape c), e)on génère un signal de commande du procédé de raffinage en fonction dudit paramètre caractéristique.
Abstract:
The present invention provides a method for determining rheological properties of a fluid, comprising steps of: a. providing an open-bore tube and defining within said bore a three dimensional grid (3DG) of voxels; b. defining at least two different cross sections, namely inlet cross section (ICS) and outlet cross section (OCS); c. defining a volume of interest (VOI) within said bore between said ICS and said OCS; d. obtaining rheological properties of said fluid; e. applying a pressure gradient to said bore between said ICS and said OCS; f. NMR imaging said fluid within said VOI; g. determining a velocity for said fluid v;; h. calculating shear rate values (SRV); i. calculating shear stress values (SSV) j. determining at least one rheological property RPi for each voxel Vox;; k. determining the difference in rheological property RPi for voxel Vox;; and 1. calculating 3D variations in said rheological property.
Abstract:
A method of analysis of a heterogeneous product, for example heparin or heparin derivatives, to define whether said heterogeneous product is consistent with a library of verified heterogeneous samples (Library 1) by analysing the variation, natural or alien. The acceptable variation of the heterogeneous product is determined by comparing Library 1 with a second set of verified spectra (Library 2), by use of comparative two-dimensional correlation spectroscopic filtering (comparative 2D-COS-f). The method comprises obtaining a one-dimensional complex spectrum, for example 1 H- NMR spectra, of a heterogeneous product and testing if it has features that are greater than features found testing a spectrum from Library 2 against Library 1. In a second embodiment comparative 2D-COS-f with iterative random sampling (2D- COS-firs) is applied, which provides a more accurate and stable extraction of aliens/unnatural features. The method defines whether a test sample is consistent with a library of production norms of heterogeneous products; determines the acceptance criteria to be considered as normal production for heterogeneous products and detects species alien to the production norms of heterogeneous products.
Abstract:
A method of testing a packaged personal care composition is disclosed. The method includes the steps of dispensing a dose of a personal care composition from a package, wherein the personal care composition is made from a first composition having a surfactant and a second composition having a hydrophobic benefit material and wherein the concentrations of the surfactant and the hydrophobic benefit material vary by weight of the personal care composition from a first end of the package to a second end of the package. The doses of the personal care composition are centrifuged to separate the surfactant from the hydrophobic benefit material and the concentration of the hydrophobic material is determined. These steps are repeated until all of the personal care composition is dispensed form the package.
Abstract:
A method is described for determining a characteristic, such as the mass, of each of a plurality of samples. The method comprises the steps of providing a plurality of coil elements each for surrounding a respective sample, causing the samples to enter an interrogation zone, each sample being surrounded by a respective coil element when it is located within the interrogation zone, applying a magnetic field in a first direction in the interrogation zone for creating in a pre-polarised state a net nuclear magnetisation of a nuclear spin species within a sample located in the interrogation zone, applying, by each coil element surrounding a respective sample located in the interrogation zone, an RF field in a second direction for temporarily changing the net nuclear magnetisation of the nuclear spin species in the sample, detecting RF energy emitted from that sample as the net nuclear magnetisation of the nuclear spin species in the sample relaxes, and, from the detected RF energy, determining the characteristic of each sample located in the interrogation zone.
Abstract:
A method of determining the mass of a moving sample is described, in which the sample is moved at a controlled velocity through a mass interrogation zone and a temperature interrogation zone, which may be upstream or downstream from the mass interrogation zone. Using a magnetic resonance method, a first signal is generated as the sample passes through the mass interrogation zone, the first signal having a characteristic that varies with the mass of the sample and with the temperature of the sample. A beam of electromagnetic radiation of a terahertz frequency or a near-infrared wavelength is generated and directed through the temperature interrogation zone. As the sample moves through the temperature interrogation zone, the electromagnetic radiation reflected from or transmitted through the sample is detected, and from that detected electromagnetic radiation a second signal is generated that has a characteristic that varies with the temperature of the sample. The characteristic of the first signal is adjusted using the second signal to produce a temperature compensated characteristic, which is compared to a similar characteristic obtained from a similar sample of known mass to determine the mass of the sample.
Abstract:
Method of determining the composition of polymer mixtures comprising defined polymer components of differing mean molar masses M n , which comprises the steps (a) recording of at least one 1 H-NMR relaxation curve of the polymer mixture and (b) calculating the proportions of the polymer components by matching the measured relaxation curve with the relaxation curves of the individual polymer components. In this way, the composition of polymer mixtures can be determined quickly and simply. Furthermore, process integration for regulating the polymerization is possible.
Abstract:
A radio frequency (RF) probe for a nuclear magnetic resonance check weighing system produces uniform magnetic field at the center of RF probe , has minimal sensitivity to electrical interference from external sources, shapes the magnetic field to minimize cross coupling from packages such as drug vials not under test, and presents minimal airflow obstruction. RF probe includes a coil with a plurality of conductive loops having a rectangular cross section carried inside two opposing, rectangular cross section housings , respectively. Housings are spaced apart and in parallel, creating an "open probe" configuration permitting a conveyor belt carrying vials whose contents are to be checked to pass between housings, and allows airflow surrounding the vials and conveyor belt to pass substantially without obstruction. Conductive loops and the housings carrying them may be placed such that the longitudinal axis of coil is oriented in either horizontal or vertical spatial relation with conveyor belt.