摘要:
Described are various embodiments of methods, devices, systems and kits for magnetic levitation-based separation of mixtures or populations of particles that include various types of particles. Some embodiments of such methods, devices, systems and kits are useful for magnetic levitation-based separation of mixtures or populations of cells that include various cell types. Some other embodiments of the described methods, devices, systems and kits are useful for magnetic levitation-based separation of mixtures or population of cellular or mixtures or population of biological molecules.
摘要:
Refere-se a presente invenção a uma melhoria na etapa de concentração magnética de partículas de minerais ou minérios por meio de um ou mais produto químico nanomagnético funcionalizado. Este produto pode ser aplicado de forma dosada diretamente na polpa (minério e água) com o objetivo de ser concentrado magneticamente aderido (seletivamente ou não) de forma eletrostática ou magnética às partículas minerais contidas na polpa de modo a incrementar susceptilidade magnética daquelas partículas expostas nas matrizes (9) às linhas de campo geradas em (2) e (3). O intuito é modificar durante a concentração magnética alguns parâmetros das partículas, sejam eles ambientais ou físicos, como por exemplo a susceptibilidade magnética e de química de superfície como por exemplo a atração eletrostática, isso executado de modo seletivo ou não, visando efeitos sobre as recuperações e teores de minerais e/ou minérios, sejam magnéticos e/ou não magnéticos.
摘要:
The present invention relates to a process for preparing whitened fly ash, wherein the process comprises the steps of: (a) subjecting fly ash to a size classification step to obtain size classified fly ash having a particle size such that at least 90wt% has a particle size of from 44µm to 250µm; (b) optionally, contacting the size classified fly ash from step (a) with water so as to form a slurry, wherein the slurry has a solid content of less than 40wt%; (c) subjecting the slurry obtained in step (b) to an exhaustive magnetic separation step to form magnetically treated fly ash, wherein the exhaustive magnetic separation step comprises a first magnetic extraction step and a second magnetic extraction step, wherein the second magnetic extraction step is carried out at a higher magnetic field strength than the first magnetic extraction step; and (d) subjecting the magnetically treated fly ash obtained in step (c) to a milling step to form whitened fly ash.
摘要:
This invention relates to the static or continuous magnetic separation of specific entities from mixtures where the separation of target entities is clone in a one-step process. It is universally applicable to the harvest or removal of such entities for processing of biological molecules, cells of ail types, virus particles, and the like, and for small- to large-scale separations of the same. By manipulation of the scientific principles that underlie this invention, specific targets can be conveniently captured for analysis, harvested or subjected to further processing on a collection surface free of bystander components. The principles employed and the methods disclosed completely obviate the need for washing of targeted entities such as cycles of resuspension and magnetic separation for removal of contaminating substances in the case of static separation or complex cycles of sample introduction and harvest to perform continuous processing.
摘要:
Human immunodeficiency virus (HIV) phenotyping assays are provided. Such assays may be used in identifying a phenotype of an HIV virion and find use in HIV susceptibility testing as well as other purposes. Methods employing HIV phenotyping assays are also provided including methods that involve the use of target cells contacted with the HIV virion for generating infected cells and/or assessing infection. Also provided are cells that may be contacted with HIV as part of such an assay, methods of infecting cells with HIV, methods of detecting HIV and methods of evaluating a cellular sample for an HIV infection. Methods of treating a subject based on the result of an assay of the present methods, as well as kits and compositions for use in practicing the herein described methods are also provided.
摘要:
Methods and apparatus for detecting cell-bound and soluble antigens in a biological sample are described. The method comprises forming complexes of at least one antibody-coated bead and at least one antigen in a solution, placing the solution in a magnetic field such that the formed complexes levitate in the solution at a particular height, and determining at least one characteristic of the antigen in the complexes based, at least in part, on an image of the complexes showing the magnetic levitation height.
摘要:
An apparatus comprising a magnetic assembly and methods for operating the apparatus are provided. The magnetic assembly may be used to manipulate molecules in a liquid preparation, for example to isolate or separate the molecules from the liquid. The magnetic assembly may be used to wash and/or isolate nucleic acid molecules of interest from a liquid preparation.
摘要:
A system and a method for the controlled manipulation of any number of magnetic particles in solution are shown. The system and the method of the present invention are based on the employment of magnetic conduits properly structured in order to inject, move and annihilate with high precision magnetic domain walls and on the fact that said magnetic domain walls exert a high attraction force on magnetic particles. The injection, movement and annihilation of domain walls along said magnetic conduit result, therefore, in the trapping, movement and release, respectively, of single magnetic particles placed in solution in proximity of said magnetic conduits. The devices of the present invention guarantee the possibility of a digital transfer of magnetic particles along conduits formed by linear segments as well as high control and nanometric precision in the manipulation of said magnetic particles on curved conduits.
摘要:
The invention relates to a method and apparatus for separating solid particles of different densities, using a magnetic process fluid. The solid particles are thoroughly mixed in a small partial flow of the process fluid. The small turbulent partial flow is added to a large laminar partial flow of the process fluid, after which the obtained mixture of the respective partial process fluids is conducted over, under, or through the middle of two magnetconfigurations, wherein the particles are separated into lighter particles at the top of the laminar process fluid and heavier particles at the bottom of the laminar process fluid, each of which are subsequently removed with the aid of a splitter. After that furthermore the particles of low density and the particles of high density are separated from the respective process streams, dried and stored. Finally, the process fluid from which the particles have been removed is returned to the original starting process stream. The method according to the invention is especially suitable, for example, for separating a mixture of polypropylene particles and polyethylene particles.