486 results about "Cell concentration" patented technology

The present invention relates generally to methods for stimulating cells, and more particularly, to a novel method to concentrate and stimulate cells that maximizes stimulation and/or proliferation of such cells. In the various embodiments, cells are stimulated and concentrated with a surface yielding enhanced proliferation, cell signal transduction, and/or cell surface moiety aggregation. In certain aspects methods for stimulating a population of cells such as T-cells, by simultaneous concentration and cell surface moiety ligation are provided by contacting the population of cells with a surface, that has attached thereto one or more agents that ligate a cell surface moiety and applying a force that predominantly drives cell concentration and cell surface moiety ligation, thereby inducing cell stimulation, cell surface moiety aggregation, and/or receptor signaling enhancement. Also provided are methods for producing phenotypically tailored cells, including T-cells for the use in diagnostics, drug discovery, and the treatment of a variety of indications, including cancer, viral infection, and immune related disorders. Compositions of cells having specific phenotypic properties produced by these processes are further provided.

The present invention relates generally to methods for stimulating cells, and more particularly, to a novel method to concentrate and/or stimulate cells that maximizes stimulation and/or proliferation of such cells. In the various embodiments, cells are stimulated and concentrated with a surface yielding enhanced proliferation, cell signal transduction, and/or cell surface moiety aggregation. In certain aspects methods for stimulating a population of cells such as T-cells, by simultaneous concentration and cell surface moiety ligation are provided by contacting the population of cells with a surface, that has attached thereto one or more agents that ligate a cell surface moiety and applying a force that predominantly drives cell concentration and cell surface moiety ligation, thereby inducing cell stimulation, cell surface moiety aggregation, and/or receptor signaling enhancement. Also provided are methods for producing phenotypically tailored cells, including T-cells for the use in diagnostics, drug discovery, and the treatment of a variety of indications, including cancer, viral infection, and immune related disorders. Compositions of cells having specific phenotypic properties produced by these processes are further provided.

A stable continuous method for producing ethanol from the anaerobic bacterial fermentation of a gaseous substrate containing at least one reducing gas involves culturing a fermentation bioreactor anaerobic, acetogenic bacteria in a liquid nutrient medium; supplying the gaseous substrate to the bioreactor; and manipulating the bacteria in the bioreactor by reducing the redox potential, or increasing the NAD(P)H TO NAD(P) ratio, in the fermentation broth after the bacteria achieves a steady state and stable cell concentration in the bioreactor. The free acetic acid concentration in the bioreactor is maintained at less than 5 g/L free acid. This method allows ethanol to be produced in the fermentation broth in the bioreactor at a productivity greater than 10 g/L per day. Both ethanol and acetate are produced in a ratio of ethanol to acetate ranging from 1:1 to 20:1.

The enumeration of cells in fluids by flow cytometry is widely used across many disciplines such as assessment of leukocyte subsets in different bodily fluids or of bacterial contamination in environmental samples, food products and bodily fluids. For many applications the cost, size and complexity of the instruments prevents wider use, for example, CD4 analysis in HIV monitoring in resource-poor countries. The novel device, methods and algorithms disclosed herein largely overcome these limitations. Briefly, all cells in a biological sample are fluorescently labeled, but only the target cells are also magnetically labeled. The labeled sample, in a chamber or cuvet, is placed between two wedge-shaped magnets to selectively move the magnetically labeled cells to the observation surface of the cuvet. An LED illuminates the cells and a CCD camera captures the images of the fluorescent light emitted by the target cells. Image analysis performed with a novel algorithm provides a count of the cells on the surface that can be related to the target cell concentration of the original sample. The compact cytometer system provides a rugged, affordable and easy-to-use technique, which can be used in remote locations.

A continuous process for production of solvents, particularly acetone-butanol-ethanol (ABE) using fermentation of solventogenic microorganisms and gas stripping is provided. The solventogenic microorganisms are inoculated in a nutrient medium containing assimilable carbohydrates (substrate) and optional other additives. Control of the solventogenic microorganism concentration in the fermentor (cell concentration) and the assimilable carbohydrate concentration in the fermentor, along with removal of solvents formed results in a continuous process for production of solvents.

Methods are disclosed for using paramagnetic particles to concentrate or harvest cells. Methods are also disclosed for clearing a solution of disrupted biological material, such as a lysate of cells or a homogenate of mammalian tissue. Methods are also disclosed for using paramagnetic particles to isolate target nucleic acids, such as RNA or DNA, from a solution cleared of disrupted biological material using the same type or a different type of paramagnetic particle. Kits are also disclosed for use with the various methods of the present invention. Nucleic acids isolated according to the present methods and using the present kits are suitable for immediate use in downstream processing, without further purification.

The enumeration of cells in fluids by flow cytometry is widely used across many disciplines such as assessment of leukocyte subsets in different bodily fluids or of bacterial contamination in environmental samples, food products and bodily fluids. For many applications the cost, size and complexity of the instruments prevents wider use, for example, CD4 analysis in HIV monitoring in resource-poor countries. The novel device, methods and algorithms disclosed herein largely overcome these limitations. Briefly, all cells in a biological sample are fluorescently labeled, but only the target cells are also magnetically labeled. In addition, non-magnetically labeled cells are imaged for viability in a modified slide configuration. The labeled sample, in a chamber or cuvet, is placed between two wedge-shaped magnets to selectively move the magnetically labeled cells to the observation surface of the cuvet. An LED illuminates the cells and a CCD camera captures the images of the fluorescent light emitted by the target cells. Image analysis performed with a novel algorithm provides a count of the cells on the surface that can be related to the target cell concentration of the original sample. The compact cytometer system provides a rugged, affordable and easy-to-use technique, which can be used in remote locations.

Methods and kits for the isolation of organisms. Such methods and kits are particularly useful for concentrating and recovering viable organisms from food material. The recovered organisms are of sufficient number and purity to allow detection using a biochip device.

Provided is a method for imaging a blood sample and a kit and system for executing the method. The method includes introducing a cell suspension including red blood cells onto a base surface of a carrier having a vertical height (H) being greater than or equal to a vertical depth (h) of the cell suspension when on the base carrier, the cell suspension including a cell concentration (C) being determined by a defined function; allowing the cells in the cell suspension to settle on the base surface of the carrier to form a monolayer of cells thereon; and acquiring at least one microscope image of at least a portion of the monolayer of cells; wherein the at least one microscope image is obtained by a microscope set to Depth Of Field that is not more than 20% of the vertical height of the cell suspension settled on the base surface.

The invention discloses a method for repairing cement-based material cracks, as well as a culture solution and a repair nutrient solution. The method for repairing cement-based material cracks by through microorganisms comprises the following steps that: a Bacillus pasteurii strain is inoculate onto a culture medium provided with a urea-containing substrate; shake cultivation is carried out at a temperature of between 25 and 37 DEG C, and then a culture bacteria solution is taken out and centrifuged and has supernatant fluid removed; strain cells are collected through the culture solution; the concentration of the strain cells is controlled in a range of between 2x10<9> and 1x10<11> cell/ml; standard sand, urea and Ca(NO3)2.4H2O mixture are added to each milliliter of strain cell solution obtained through collection, mixed, stirred into slurry and injected into cement stone cracks; the frequency of the repair nutrient solution injection is not less than two times; finally, maintenance is carried out. In the culture solution, each liter of culture solution contains 4 to 6 g of peptone, 2 to 4 g of beef extract and 20 to 60 g of urea. The method fully utilizes microbial resources in nature; CO3<2-> decomposed out through microbial enzyme can chelate Ca<2+> in a substrate so as to be mineralized and deposit calcium carbonate, and is close in the combination with the substrate and good in stability.

The enumeration of cells in fluids by flow cytometry is widely used across many disciplines such as assessment of leukocyte subsets in different bodily fluids or of bacterial contamination in environmental samples, food products and bodily fluids. For many applications the cost, size and complexity of the instruments prevents wider use, for example, CD4 analysis in HIV monitoring in resource-poor countries. The novel device, methods and algorithms disclosed herein largely overcome these limitations. Briefly, all cells in a biological sample are fluorescently labeled, but only the target cells are also magnetically labeled. In addition, non-magnetically labeled cells are imaged for viability in a modified slide configuration. The labeled sample, in a chamber or cuvet, is placed between two wedge-shaped magnets to selectively move the magnetically labeled cells to the observation surface of the cuvet. An LED illuminates the cells and a CCD camera captures the images of the fluorescent light emitted by the target cells. Image analysis performed with a novel algorithm provides a count of the cells on the surface that can be related to the target cell concentration of the original sample. The compact cytometer system provides a rugged, affordable and easy-to-use technique, which can be used in remote locations.

A system for enumeration of cells in fluids by image cytometry is described for assessment of target populations such as leukocyte subsets in different bodily fluids or bacterial contamination in environmental samples, food products and bodily fluids. Briefly, all cells in a biological sample are fluorescently labeled, but only the target cells are also magnetically labeled. A small, permanent magnet is inserted directly into the chamber containing the labeled sample. The magnets are coated with PDMS silicone rubber to provide a smooth and even surface which allows imaging on a single focal plane. The cells are illuminated and the images of the fluorescent light emitted by the target cells are captured by a CCD camera. Image analysis performed with a novel algorithm provides a count of the cells on the surface that can be related to the target cell concentration of the original sample.

The invention discloses a method for simultaneous and efficient amplification of CD<3+>CD<56+>CIK cells and CD<3->CD<56+>NK cells. The method comprises the steps as follows: the concentration of separated PBMC (peripheral blood mononuclear cells) is adjusted by a serum-free medium containing autologous plasma, an Anti-CD16 antibody, IL-2 and IL-15 are added, and then the mixture is transferred into a T175 culture flask for culture; an Anti-CD3 antibody and an Anti-CD137 antibody are added; a serum-free medium containing the autologous plasma, IL-2 and IL-15 is supplemented every two days according to the cell growth condition; the cell concentration is controlled to be about 1.5*10<6>/ml; and after culture is performed for 14-21 days, large quantities of high-purity CD<3+>CD<56+>CIK cells and CD<3->CD<56+>NK cells can be obtained simultaneously, and the total cell quantity can reach an effective value of the cell quantity required for adoptive cellular immunotherapy clinically for tumor. The method for simultaneous and efficient amplification of the CD<3+>CD<56+>CIK cells and the CD<3->CD<56+>NK cells is simple, convenient, effective and high in cell killing activity.

The invention provides a haematococcus pluvialis culture production method and a method for further producing astaxanthin. The haematococcus pluvialis culture process is carried out in a large-size container, and haematococcus pluvialis is cultured under the irradiation of an artificial LED (light-emitting diode) light source; the artificial LED light source is provided by a high-brightness LED, the wavelength range of single-color light emitted by the LED light source is from 450nm (width band of 30nm) to 640nm (width band of 30nm); the used illumination intensity is 30mu E/m<2>.s-3000mu E/m<2>.s; in the culture process, cells are maintained to be suspended in the culture liquid in utilizing a ventilation mode, and temperature is maintained to be 15-28 DEG C; and the pH value is maintained to be 6.8-8.5. According to the invention, on one hand, more nutrient substances are accumulated so as to accelerate growth and reproduction; on the other hand, the problem that the temperature is difficult to control due to the adoption of a natural sun light source is solved, thereby saving a large amount of energy consumed for controlling the temperature in summer and winter, reducing production cost and environmental pollution; and simultaneously, according to the characteristic that photosynthesis pigments demand different light qualities, the most effective single-color diode light source is adopted, thereby improving energy utilization rate, production efficiency and cell concentration.

The present invention is process of fermenting Crypthecodinium cohnii(Seligo)Javornicky as one kind of marine micro algae to produce docosahexaenoic acid grease. The process includes continuous culturing Crypthecodinium cohnii(Seligo)Javornicky in liquid culture medium to obtain algae cell and extracting the algae cell to obtain docosahexaenoic acid grease. The present invention has proper marine micro algae strain, vitamins added into the culture medium and proper technological process, so that the present invention has high yield of docosahexaenoic acid grease, docosahexaenoic acid content in algae cell of 30-50 %, algae cell concentration of 20-40 g/L and oil content in algae cell of 20-50 %.

The invention relates to a method for culturing gamma-delta-T cells, and in particular relates to a method for in-vitro amplification of gamma-delta-T cells, wherein the method comprises the following operating steps of: pre-coating a T75 culture bottle by a TCR-gamma-delta resisting antibody and CD28McAb for later use use; isolating the peripheral blood mononuclear cell (PBMC) of a patient; regulating the PBMC concentration to 1*10<6> 6/ml by a serum-free culture medium which contains 5% of autologous plasma, and transferring PBMC cell suspension into the T75 culture bottle; adding an initial culture medium which contains proper concentrations of Zoledronat, HSP70, 1L-2, 1L-7 and 1L-15; culturing in a saturated humid environment containing 5% of CO2 at 37 DEG C; depending on growth situation of the cell, changing the culture medium every 2-3days, to control the cell concentration at about 2.5*10<6>/ml; meanwhile, compensating full doses of Zoledronat, HSP70, 1L-2, 1L-7 and 1L-15; and continuously culturing for 12-16days, to obtain a great amount of gamma-delta-T cells which are comparatively high in purity.

The invention relates to a method for amplifying cytokine induced kill (CIK) cells and a CIK cell preparation, which belong to the field of in-vitro culture of immune cells. The method concretely adopts the following procedures that: a, lymphocyte cell separation liquid is used for separating out peripheral blood mononuclear cells (PBMC), a culture bag is covered by CD3mAb and CD137mAb in advance, the concentration of the PBMC obtained through separation is regulated to 1*10<6>/ml by a serum-free culture medium, in addition, IFN-gamma is added to obtain the final concentration being 1000 mu/ml, and the materials are transferred to the culture bag to be cultured; b, CD3mAb, CD28mAb and CD137mAb are added after the culture for 24h, in addition, the prepared serum-free culture medium is added, IL-1alpha, IL-2, IL-12 and IL-15 are added into the prepared serum-free culture medium, and obtained CIK cells are collected through centrifugation after the continuous culture for 7 to 21 days; and c, in the culture process of the step b, the cells in the culture bag are counted every three days, in addition, the culture medium is supplemented according to the concentration of the cells, and the CD3mAb, the CD28mAb and the CD137mAb are added to the corresponding concentration every six days, so the CIK cell generative cell times and the cytotoxin activeness are improved.

The invention belongs to the technical field of biology and relates to a method for producing a microecological foliar fertilizer by utilizing probiotics and microalgae. The method comprises the following steps of: firstly, culturing to obtain liquid culture prepared by bacillus, lactic acid bacteria and rhodopseudomonas palustris with the cell concentration being 10 billion/ml and saccharomycetes and chlorella with the cell concentration being 2 billion/ml respectively, then preparing liquid culture with four types of probiotics and one type of chlorella, and mixing the liquid cultures according to respective volume ratio to obtain the liquid microecological foliar fertilizer with the total cell concentration being more than 5 billion/ml. The method has the advantages that the used strains and chlorella are all probiotics which can be eaten by human, and are safe and non-toxic; the microecological foliar fertilizer integrates the advantages of promoting the plant growth of the probiotics, the chlorella and metabolites thereof; and the microecological foliar fertilizer is diluted with water by 100 times every 10 days and is sprayed on plant leaves, and the plant yield is increasedby more than 30% in 60 days. The method has an important application value in aspect of improving the yield and the quality of crops such as grain and the like.