|| List of recent Chromatography-related patents
|Neutral zwitterionic displacer molecules for hydrophobic displacement chromatography|
A process for separating organic compounds from a mixture by reverse-phase displacement chromatography, including providing a hydrophobic stationary phase; applying to the hydrophobic stationary phase a mixture comprising organic compounds to be separated; displacing the organic compounds from the hydrophobic stationary phase by applying thereto an aqueous composition comprising a non-surface active hydrophobic neutral zwitterionic displacer molecule and optionally an organic solvent; and collecting a plurality of fractions eluted from the hydrophobic stationary phase containing the separated organic compounds; in which the non-surface active hydrophobic neutral zwitterionic displacer molecule comprises a hydrophobic zwitterion having the general formula, as defined in the disclosure: [cm-r*—cm′].. .
|Polymer films having improved heat sealing properties|
A polymer composition comprising an ethylene alpha-olefin copolymer, wherein the polymer composition is characterized as having (a) a density in the range of from greater than about 0.910 g/cc to about 0.930 g/cc, as determined according to astm d1505; (b) a melt index in the range of from greater than about 0.5 g/10 min to about 3 g/10 min, as determined by astm d1238, condition 190° c./2.16 kg; (c) a molecular weight distribution of from about 3.4 to about 12, as determined by gel permeation chromatography (gpc); (d) a weight average molecular weight of from greater than about 85 kg/mol to about 160 kg/mol, as determined by gel permeation chromatography (gpc); and (e) a z-average molecular weight of from greater than about 210 kg/mol to about 500 kg/mol, as determined by gel permeation chromatography (gpc).. .
|Herbal extract composition for the treatment of diabetes and a method of extracting the same|
The embodiments herein provide a method for isolation and purification of a novel oligosaccharide molecule from the fruits of rosa arvensis for the treatment of diabetes. The fruit is dried, powdered and subjected to deionized water.
|Analytical method of post-translational modifications in hemoglobin|
An analytical method of post-translational modifications in hemoglobin is disclosed. The analytical method comprises the steps of providing a blood comprising the hemoglobin with post-translational modification of nitration, nitrosylation, or oxidation; performing an extraction process to the blood by an organic solvent; quantifying the hemoglobin by a fluorescent spectrometry; hydrolyzing the hemoglobin into a plurality of peptides by an enzyme; and using a nanoflow liquid chromatography-nano spray ionization tandem mass spectrometry to characterize and quantify the post-translational modifications of the hemoglobin..
|Isolation and purification of antibodies using protein a affinity chromatography|
Disclosed herein are methods for the isolation and purification of antibodies wherein the use of an affinity chromatographic step results in an antibody composition sufficiently pure for pharmaceutical uses. The methods described herein comprise ph viral reduction/inactivation, ultrafiltration/diafiltration, affinity chromatography, preferably protein a affinity, ion exchange chromatography, and hydrophobic chromatography.
|General mass spectrometry assay using continuously eluting co-fractionating reporters of mass spectrometry detection efficiency|
The invention provides general methods for quantifying any conceivable compound including small organic molecules and biological molecules in mass spectrometric measurements. The methods include the use of chemical or biological reporters such as artificial polypeptides containing proteolytic cleavage sites, which provide proteolytic reporter peptides for standardization of mass spectrometric detection efficiency.
|System and process for biopolymer chromatography|
A chromatography system for separation of a biopolymer is described, comprising at least one feed tank, at least one hold tank, at least one elution buffer tank, at least one eluate tank, at least two packed bed chromatography columns and at least one pump and at least one outlet detector both fluidically connected to said each packed bed chromatography column, wherein the feed tank, the hold tank(s), the elution buffer tank and the eluate tank are each fluidically connected to the packed bed chromatography columns via a system of valves.. .
|Methods and controllers for simulated moving bed chromatography for multicomponent separation|
A method of separating a feed mixture in a simulated moving bed includes flowing fluid in a first flow configuration comprising: supplying the feed mixture downstream of a valve in a shut off position that stops fluid flow to a first column, removing a raffinate stream component, and supplying a remaining fluid flow to a second column; supplying a desorbent to a third column and removing an extract stream downstream; and passing a remaining liquid flow through a fourth column, and removing an intermediate stream. The method includes flowing fluid in a second flow configuration in which the valve is in a position that permits fluid flow to the first column, and supplying a desorbent and removing an extract stream downstream from the column to which the desorbent is supplied; and removing a raffinate stream.
|Method and apparatus for chromatographic purification|
The present invention relates to a method and an apparatus suitable for a continuous chromatography process which only needs three separation columns. The process is a two step procedure comprising two chromatographic steps.
|Evacuable inlet for gas chromatograph injector|
A gas chromatography (gc) system comprises: a sample injector adapted to receive a liquid sample into an interior cavity thereof and to volatilize the liquid sample; a gc column configured to receive the volatilized sample from the sample injector; a carrier gas inlet line fluidically coupled to a gas inlet port of the sample injector; a septum purge vent line fluidically coupled to a first gas outlet port of the sample injector; a split-flow vent line fluidically coupled to a second gas outlet port of the sample injector; and a vacuum system configured to apply vacuum to the septum purge vent line, the split-flow vent line and the interior cavity of the sample injector. Alternatively, the vacuum system may be coupled to a vacuum port of the sample injector.
|Method for evaluating human blastocyst by norepinephrine level in blastocyst culture solution|
The invention provides a new method for evaluating transfer embryos including blastocysts used for in vitro fertilization in fertility treatment, and a method for evaluating transfer embryos using a new biomarker necessary for evaluation. The method comprises the steps of (a) providing a test object, for example, a culture solution of a human blastocyst, containing norepinephrine (noradrenaline) released from a transfer embryo, such as a human blastocyst, obtained from a subject; (b) quantitatively analyzing norepinephrine in the test object by a combination of ultra high performance liquid chromatography and mass spectrometry or the like; (c) predicting the quality of the transfer embryo based on the amount of norepinephrine from analysis results obtained; and (d) transferring the embryo into a suitable female recipient for implantation, if the transfer embryo is predicted to be of good quality and/or to lead to the establishment of a viable pregnancy based on step (c)..
The invention relates to centrifuge apparatus of a type which is typically, although not necessarily exclusively, for use in counter current chromatography in which substances are caused to partition between two phases in a column typically in the form of a helix or spiral. The apparatus includes leads which connect the inlet and outlet conduits to a column which is moved by the apparatus and in accordance with the invention the leads are constrained within a sheath which includes a lubricant to allow lubrication of the same while the apparatus is in use and thereby increase the longevity of the apparatus.
|Thin-layer chromatography plate|
An object of the present invention is to provide a tlc plate which allows separation and detection of target substances on one plate. Provided is a tlc plate comprising a substrate, a separating medium layer stacked on the substrate, and a permeation layer stacked on the separating medium layer and allowing permeation of a target substance separated in the separating medium layer, wherein the separating medium layer has separating property for the target substance and optical responsiveness for ultraviolet rays, and the permeation layer has optical responsiveness different from that of the separating medium layer..
|Analysis method for dye for organic solar cell and purification method therefor|
This analysis method includes: subjecting a sample solution of a dye-containing sample in an organic solvent to normal-phase liquid chromatography to separate the sample solution and detect separated components. The normal-phase liquid chromatography involves (b1) using a separation column filled with a column packing material which is prepared by modifying a base material with a polar modifying group, and (b2) using as an eluent a polar organic solvent containing an acid..
|Preparation method of 1-palmitoyl-3-acetylglycerol, and preparation method of 1-palmitoyl-2-linoleoyl-3-acetylglycerol using same|
Disclosed are a method for preparing 1-palmitoyl-3-acetylglycerol in high purity and high yield without a purification process using a column chromatography, and a method for preparing 1-palmitoyl-2-linoleoyl-3-acetylglycerol in high purity and high yield using the same as a key intermediate. The method for preparing 1-palmitoyl-3-acetyl glycerol comprises the steps of: forming a reaction mixture including 1-palmitoyl-3-acetyl glycerol of the formula 1 in the specification by reacting 1-palmitoylglycerol of the formula 2 in the specification and an acetylating agent; and separating the optically active 1-palmitoyl-3-acetylglycerol by crystallizing the reaction mixture in a saturated hydrocarbon solvent having 5 to 7 carbon atoms..
|Method for the enrichment of rebaudioside b and/or rebaudioside d in stevia-derived glycoside compositions using adsorb-desorb chromatography with a macroporous neutral adsorbent resin|
The invention relates to the use of adsorb/desorb chromatography to prepare enriched compositions comprising rebaudioside b and/or rebaudioside d. Compositions with enriched rebaudioside-b and/or rebaudioside-d components may be prepared from stevia-derived glycoside compositions using an adsorb-desorb chromatography process where the stationary phase of the chromatography bed comprises a macroporous neutral adsorbent resin..
|Method for the purification of antibodies|
A method for the purification of immunoglobulins by ion exchange chromatography is described. The chromatographic method uses a weak ion exchange resin and a single step elution process for the purification of an immunoglobulin.
|Purification of immunoglobulins using affinity chromatography and peptide ligands|
An immunoglobulin binding peptide having the general formula, from amino terminus to carboxy terminus, of z—r1—r2—r3—r4—r5—r6—x, is described, wherein: r1 is h or y; r2 is a hydrophobic, preferentially aromatic, amino acid (for example w, f, y, v); r3 is a positively charged or aromatic amino acid (for example r, h, f, w); r4 is a hydrophobic or positively charged amino acid (for example g, y, r, k, l); r5 is a positively charged or aromatic amino acid (for example w, f, r, h, y); r6 a random amino acid but preferably hydrophobic or negatively charged (for example v, w, l, d, h); x is present or absent and when present is a linking group; and z is present or absent and when present is a capping group bonded to the n terminus of r1; and wherein the amino acids of said peptide are in d form, l form, or a combination thereof. Methods of using such peptides for the purification of immunoglobulins are also described.
|Kit for immuno-chromatography, reagent for immuno-chromatography, and method of detecting using them|
A kit for immunochromatography, having: a planar test strip having a test area and a reference area, the test area having a test purpose capturing substance, the reference area having a reference purpose capturing substance; fluorescent particulates provided with a binding property to a target substance, the target substance provided with a binding property to the test purpose capturing substance; and light absorbing particulates provided with a binding property to the reference purpose capturing substance.. .
|Chromatography method, chromatography kit, and method of producing an insoluble carrier for chromatography|
A chromatography method including a step of developing a complex of a specimen and a labeled substance modified by a first bondable substance which can be bonded to the specimen on an insoluble carrier, a step of capturing the complex of the specimen and the labeled substance at a reactive site on the insoluble carrier, a step of washing the reactive site on the insoluble carrier using a washing liquid, a step of detecting the specimen which is captured at the reactive site after a signal of the labeled substance is amplified by an amplification liquid, in which the reactive site on the insoluble carrier includes (i) a second bondable substance which can be bonded to the specimen or a substance having affinity to the first bondable substance which can be bonded to the specimen, and (ii) polyethylene glycol having the molecular weight from 1,500 to 10,000.. .
|Glycoproteins having lipid mobilising properties and therapeutic applications thereof|
A biologically active lipid mobilising agent for use in therapy is disclosed which has the properties and characteristics of a zn-α2-glycoprotein, or of a fragment thereof having an apparent molecular mass mr greater than 6.0 kda as determined by gel exclusion chromatography. Methods of isolation and purification from biological material are also disclosed together with uses of the material for making up pharmaceutical compositions, especially pharmaceutical compositions useful for treating mammals to achieve weight reduction or for controlling obesity.
|Mixed-mode chromatography membranes|
Described are composite materials and methods of using them for mixed-mode chromatography. In certain embodiments, the composite material comprises a support member, comprising a plurality of pores extending through the support member; and a multi-functional cross-linked gel.
|Method for measuring stable hemoglobin a1c using liquid chromatography, and method for simultaneous measurement of stable hemoglobin a1c and abnormal hemoglobin using liquid chromatography|
The present invention is a method for measuring stable hemoglobin a1c using liquid chromatography, installing on a flow path of a liquid chromatograph a filter whose surface is treated with a solution containing 1 to 50% by weight of a silicone oil or a solution containing 1 to 50% by weight of a silicone resin, and setting a pressure value generated in a measurement system of the liquid chromatograph to 9.8×103 pa or more and 19.6×105 pa or less.. .
|Turbulent flow mixing device for use in a chromatography system|
A mixing device for use in a chromatography system, the device includes an exterior housing having a first end and a second end and a hydraulic flow connector at the first end of the exterior housing. A cartridge including a chamber is enclosed within the exterior housing.
|Quality control reagents and methods|
The present invention provides reagents for instrumentation quality control and methods of use thereof. In particular, sets of peptides or other molecules are provided for evaluating the performance of instruments with mass spectrometry (ms) and/or liquid chromatography (lc) functionalities..
|Method for producing peptide fractions and use thereof|
The invention relates to a method for producing enriched peptide fractions from protein-containing raw materials, in which protein hydrolysates are separated using chromatography, according to the physiochemical properties thereof, by means of stationary phases with an aqueous solution as an elution agent.. .
|Separation of acetylated proteins from unacetylated proteins|
The invention relates to a process for separating acetylated proteins from unacetylated proteins. In particular, the invention relates to a process of using multimodal chromatography to separate acetylated proteins from unacetylated proteins.
|Integrated modular unit including an analyte concentrator-microreactor device connected to a cartridge-cassette|
The present invention relates to an immunoaffinity device for capturing one or more analytes present at high or low concentrations in simple or complex matrices. The device is designed as an integrated modular unit and connected to capillary electrophoresis or liquid chromatography for the isolation, enrichment, separation and identification of polymeric macromolecules, primarily protein biomarkers.
|Purification of biological products by constrained cohydration chromatography|
Materials and methods for use of constrained cohydration agents in the purification of biological materials such as antibodies, viruses, cells, and cellular organelles in connection with convective chromatography, fluidized bed or co-precipitation applications.. .
|Preparation of pre-coated rp-rotors and universal chromatorotors, chromatographic separation devices and methods for centrifugal preparative chromatography|
Reversed phase solid silica gel sorbent layers which can adhere with appropriate binders to a solid surface were developed. Pre-coated rp-rotors of different thickness were used these pre-coated rp-rotors can be used for centrifugal preparative thin-layer chromatography (cptlc) using any appropriate device for centrifugal chromatography, like chromatotron® or cyclograph.
|Chromatography columns, systems and methods|
The present invention relates to axial flow chromatography columns, methods for separating one or more analytes in a liquid by the use of such columns, and systems employing such columns. The column comprises a first port and a second port, the first port and said second port being at essentially the same level or elevation above the level of the bed space on the chromatography column..
|Packing of chromatography columns|
The invention provides a packing method for high efficiency chromatography columns starting from dry swellable particles, as well as columns packed by the method and the use of the columns in separation of biomolecules. In the packing method, an amount of dry swellable particles sufficient to give a swollen volume in a liquid of about 105-120% of the column chamber volume is transferred to the column, the column is closed and the liquid is provided to the column..
|Method and apparatus for desolvating flowing liquid|
Methods and apparatus for desolvating flowing liquid streams while retaining temporal resolution of dissolved substrates are disclosed. A novel small-scale self-regulating spray dryer preserves temporal resolution while desolvating a liquid chromatography eluent stream and depositing the solute onto an optical surface for infrared spectrographic analysis.
|Apparatus and methods for fluid processing and flow control|
Fluid processing apparatus has a prefabricated branched network of flexible tubing, for conducting process fluid between process elements of the apparatus, and control valves. A tubing support has opposable front and rear plates which define a pattern of support channels between them in which the flexible tubing network lies, so that the support channels limit or prevent expansion of the flexible tubes.
|Purification of not-glycosylated polypeptides|
The current invention reports a method for the purification of a not-glycosylated, heterologous polypeptide, which has been recombinantly produced in a prokaryotic cell, wherein the method comprises three chromatography steps of which the first chromatography step selected from i) hydrophobic charge induction chromatography, or ii) hydrophobic interaction chromatography, or iii) affinity chromatography, or iv) ion exchange chromatography, the second chromatography step is selected from i) anion exchange chromatography, or ii) cation exchange chromatography, or iii) hydroxylapatite chromatography, or iv) hydrophobic interaction chromatography, and the a third chromatography step is selected from i) hydrophobic charge induction chromatography, or ii) anion exchange chromatography, or iii) cation exchange chromatography, or iv) hydrophobic interaction chromatography, whereby the first chromatography step is an affinity chromatography in case of polypeptides capable of interacting with metal ligands, the second chromatography step is not a hydroxylapatite chromatography step in case of polypeptides with an isoelectric point below 6.0, and the third chromatography step can be performed in flow-through mode with polypeptides having a low or high isoelectric point.. .
|Porous material and devices for performing separations, filtrations, and catalysis and ek pumps, and mthods of making and using the same|
Embodiments of the present invention are directed to a porous monolith polymeric composition having utility in catalysis, chromatography, filtration, and electro-kinetic pumps, devices incorporating such composition and methods or making and using such monoliths. The monoliths are characterized by a substantially homogeneous skeletal core with little shrinkage, few voids and few channels..
|Sequential low/high-resolution library search|
Provided herein are systems and method for using unit mass library searches for sample identification in accurate mass spectrometry. In general, the systems and methods described herein: (a) obtain an accurate mass spectrum of a sample; (b) calculate a unit mass spectrum based on the accurate mass spectrum; and (c) conduct a unit mass library search, based on the calculated unit masses, to obtain at least one candidate species to thereby identify the sample.
|Electrospray emitter assemblies for microfluidic chromatography apparatus|
An apparatus for chemical separations includes a microfluidic substrate having an outlet aperture for outputting an eluent of a sample. An emitter assembly includes having a deformable end portion, an inlet near the deformable end portion to receive the sample eluent from the microfluidic substrate, and an electrically conductive outlet portion to emit a spray of the sample eluent.
|Methods and devices for open-bed atmospheric collection for supercritical fluid chromatography|
A supercritical fluid chromatography system comprises a first pump for pumping a first flow stream comprising a compressible fluid and a second pump for pumping a second flow stream comprising a modifier fluid. The second pump is in parallel with the first pump.
|Gas chromatograph having an absorption spectrometer and method for analyzing a gas mixture via gas chromatography|
A method in which a sample of a gas mixture to be analyzed via gas chromatography is conducted through a chromatographic separating device via a carrier gas, separated components of the gas mixture are subsequently quantitatively determined in an absorption spectrometer having a wavelength-adaptable light source, and in order to increase the speed of analysis and to be able to also determine components that cannot be measured via absorption spectroscopy, the wavelength of the light source can be adapted to an absorption line of the carrier gas, where the individual components of the gas mixture are determined indirectly via a concentration reduction of the carrier gas.. .
|Process for separation of oligonucleotide of interest from a mixture|
The present invention is directed to a method for separation of an oligonucleotide from a mixture using a biphasic mobile phase/stationary phase liquid-liquid chromatography system. A first mobile phase contains the oligonucleotide and the stationary phase contains an exchanger substance that removably binds to the target oligonucleotide.
|Methods and systems for determining the amount of thiopurine metabolites in a sample|
Disclosed are methods and systems for the analysis of thiopurine drug metabolites in a sample using liquid chromatography/mass spectrometry.. .
|Fluorescence assay for ghrelin o-acyltransferase activity|
An assay to detect ghrelin o-acyltransferase activity using an acrylodan-labeled peptide mimic of ghrelin that provides for high-throughput screening for ghrelin o-acyltransferase inhibitors and detection via high performance liquid chromatography. Alternatively, the assay for ghrelin acylation may be based on a synthetic peptide substrate that mimics the n-terminal sequence of ghrelin and has an environmentally-sensitive fluorophore attached to its c-terminal amino acid through chemoselective ligation..
|Analysis of dried blood spot samples in a microfluidic system with dilution of extracted samples|
An apparatus for use in a chromatography system includes a microfluidic substrate having a fluidic channel configured as an analytical chromatographic column and a fluidic port on one side of the microfluidic substrate. The fluidic port opens at a head end of the analytical chromatographic column.
|Device, system and method for in-vivo immunoassay|
In vivo devices, systems and methods for in vivo immunoassay include inserting into a patient's body lumen an in vivo diagnostic device comprising a housing. The housing of the device comprises a chamber, and a chromatography strip for immunoassay of a body lumen substance.
|Immunochromatography detection sensor comprising optical waveguide and a detection method using the same|
The present invention relates to an immunochromatographic detection sensor comprising optical waveguides and a detection method using the same, and more particularly, to an immunochromatographic detection sensor comprising optical waveguides, in which the optical waveguides are provided under the membrane, probe beams transmitted through the optical waveguide maximize the interaction frequency between evanescent wave generated on the surface of the optical waveguide and the colored conjugate in the band formed on the membrane, resulting in the absorbance signal from the colored conjugate being greatly amplified to improve the sample detection sensitivity, and to a detection method using the same.. .
|Pure albumin and its method of preparation and detection|
The subject of the present invention is a pure monomeric bovine serum albumin, a method of producing it characterised by the use column chromatography in resin and a method of identifying it using dynamic light scattering.. .
|Methods for purification of arylsulfatase a|
Methods of producing arylsulfatase a are described herein. The methods can include one or more steps of chromatography.
|Method of extracting lutein/xanthophylls from natural materials and highly purified lutein/xanthophylls obtained from the method thereof|
The present invention provides the new method for extracting lutein from natural materials wherein the said method comprises of modification of natural lutein ester in the natural materials to free lutein and/or low molecular weight lutein ester, extraction of the said natural materials with supercritical fluid at the optimal conditions. The said method yields high amount of crude lutein with high purity due to the mild condition used for extraction.
The present invention provides a chromatographic separation process for recovering a polyunsaturated fatty acid (pufa) product from a feed mixture, which process comprises the steps of: (i) purifying the feed mixture in a first separation step in a simulated or actual moving bed chromatography apparatus having a plurality of linked chromatography columns containing, as eluent, an aqueous organic solvent, to obtain an intermediate product; and (ii) purifying the intermediate product obtained in (i) in a second separation step using a simulated or actual moving bed chromatography apparatus having a plurality of linked chromatography columns containing, as eluent, an aqueous organic solvent, to obtain the pufa product; wherein (a) the first and second separation steps are carried out sequentially on the same chromatography apparatus, the intermediate product being recovered between the first and second separation steps and the process conditions in the chromatography apparatus being adjusted between the first and second separation steps such that the pufa product is separated from different components of the feed mixture in each separation step; or (b) the first and second separation steps are carried out on separate first and second chromatography apparatuses respectively, the intermediate product obtained from the first separation step being introduced into the second chromatography apparatus, and the pufa product being separated from different components of the feed mixture in each separation step.. .
|Isotopic recoding for targeted tandem mass spectrometry|
Aspects of the present disclosure include methods for detecting a low abundance protein and methods for identifying a site of n-glycosylation on a protein. In practicing methods according to certain embodiments, a eukaryotic cell is contacted with an isotopic labeling composition and isotopically labeled n-glycosylated peptides obtained from the eukaryotic cell are assessed by liquid chromatography-tandem mass spectrometry.
|Electrode for nonaqueous electrolyte secondary battery, nonaqueous electrolyte secondary battery, and battery pack|
An electrode for a nonaqueous electrolyte secondary battery of an embodiment has an active material layer containing an active material and a binder containing fluorine, and a current collector bound to the active material layer. When a thermal decomposition start temperature of the binder is t1° c.
|Pump and injector for liquid chromatography|
A combined pump-injector valve utilizing a single piece as the barrel of the pump and as the stator of the valve, thus eliminating any need for connections between a pump and a valve, and therefore the potential for high-pressure leaks or pressure reductions. The combined pump-injector valve permits injection of nanoliter-sized samples into a chromatographic column, which is sealed during loading of the sample and filling of the pump, such that complete analyses can be completed with microliters of mobile phase with nanoliters of a sample..
|Pipe containing a metal casing with a plastics material inlay for use in low and high pressure applications, in particular as an hplc column|
A chromatography column comprises a pipe that contains a tubular metal casing with an inlay and sealing ring. The inlay is configured as a plastics material tube and is pushed or drawn into the metal casing and a sealing ring of plastics material is connected to the inlay at the end.
The present invention provides a chromatographic separation process for recovering a polyunsaturated fatty acid (pufa) product, from a feed mixture, which process comprises introducing the feed mixture to a simulated or actual moving bed chromatography apparatus having a plurality of linked chromatography columns containing, as eluent, an aqueous organic solvent, wherein the apparatus has a plurality of zones comprising at least a first zone and second zone, each zone having an extract stream and a raffinate stream from which liquid can be collected from said plurality of linked chromatography columns, and wherein (a) a raffinate stream containing the pufa product together with more polar components is collected from a column in the first zone and introduced to a nonadjacent column in the second zone, and/or (b) an extract stream containing the pufa product together with less polar components is collected from a column in the second zone and introduced to a nonadjacent column in the first zone, said pufa product being separated from different components of the feed mixture in each zone, and wherein the aqueous organic solvent is other than aqueous alcohol.. .
|Methods of purification of native or mutant forms of diphtheria toxin|
The present invention relates to the use of hydroxyapatite chromatography and multimodal chromatography, for punfication of diphtheria toxin, or a mutant form thereof, from a mixture, for example, a host cell fermentation mixture containing impurities such as host cell proteins and dna. This invention further relates to the integration of such a method into a multi-step procedure with other fractionation methods for purification of diphtheria toxin suitable for in vitro and in vivo applications..
|Chromatography filter paper-based elisa|
A chromatography filter paper-based elisa includes following steps: providing a chromatography filter paper plate provided with a plurality of independent hydrophilic regions defined by at least one hydrophobic region; immobilizing an antigen of a sample onto one of the hydrophilic regions of the chromatography filter paper plate; and detecting the antigen with an elisa process, wherein an antibody used in the elisa process is a monoclonal antibody. The present invention has advantages in lower amount of loaded sample, higher sensitivity and rapid analysis in comparison to conventional elisa..
|Non-invasive detection of fetal genetic traits|
Blood plasma of pregnant women contains fetal and (generally>90%) maternal circulatory extracellular dna. Most of said fetal dna contains 500 base pairs, said maternal dna having a greater size.
|Device for controlling a piston pump unit for liquid chromatography|
A control device of a piston pump unit comprising at least two piston-cylinder units that operate in a phase-shifted manner for the purpose of liquid chromatography and to a piston pump unit is described. The control device corrects fluctuations of the system pressure while switching from one piston cylinder unit to the respective other piston cylinder unit.
|Vacuum ultraviolet absorption spectroscopy system and method|
An efficient absorption spectroscopy system is provided. The spectroscopy system may be configured to measure solid, liquid or gaseous samples.
|Rotary shear valve with a two-pin drive shaft for liquid chromatography applications|
A rotary shear valve assembly for liquid chromatography applications comprises a rotor assembly having a rotor and a drive shaft with a head portion. The rotor has a substantially planar surface with one or more rotor grooves and a pair of holes.
|Chromatography system with led-based light source|
A detector system having a single emitter body. The emitter body has a plurality of light emitting diodes (leds) for emitting a plurality of wavelengths.
|Collection system for purification flowstreams|
A collection system for collecting samples from a flowstream (5) exiting a supercritical fluid chromatography system is provided. The collection system comprises: (i) a first back pressure regulator (10) on the flowstream as it exits the chromatography system, (ii) a gas-liquid separator (30) having a tapered and angled dripper (65), which introduces the flow into the separator at an angle tangential to the separator wall; and (iii) one or more fraction collectors (15), wherein the fraction collector is at a reduced pressure collection point, between 100 bar and atmospheric pressure.
|Efficient chiller for a supercritical fluid chromatography pump|
Methods and systems for pumping compressible fluids in high pressure applications such as high-pressure liquid chromatography (hplc) or supercritical fluid chromatography (sfc) applications are disclosed. An improved cooling device for a pump head for use in a supercritical fluid chromatography (sfc) system is described.
|Purification of fusion proteins|
The invention relates generally to methods for purifying a fc-fusion protein produced in a eukaryotic expression system. More specifically, the invention provides a robust and scalable downstream purification process suitable for use in manufacturing tnfr:fc for human administration which comprises an optimized protein a affinity chromatography step and two ion exchange chromatography steps both of which are operated in the bind-and-elute mode..
|Single unit chromatography antibody purification|
The present invention relates to a method for the purification of antibodies from a protein mixture produced in a bioreactor, at least comprising the steps of intermediate purification and polishing, wherein the intermediate and polishing step comprises in-line anion exchange chromatography (aex) treatment and mixed mode chromatography (mimo) treatment in flow through mode. The present invention further relates to a single operational unit comprising both an anion exchange chromatography part and a mixed mode chromatography part, which are serially connected, wherein the unit comprises an inlet at the upstream end of the anion exchange chromatography part and an outlet at the downstream end of the mixed mode chromatography part and wherein the unit also comprises an inlet between the anion exchange chromatography part and the mixed mode chromatography part..
|Low ph protein purification process|
The invention relates to a process for recovering and purifying bile salt-stimulated lipase (bssl) in a solution which contains impurities, said process comprising the steps: (i) applying bssl to a hydrophobic interaction chromatography (hic) resin; (ii) removing impurities by washing said hic resin with a wash composition having a ph in the range from 4 to 5; and (iii) recovering bssl from said hic resin.. .
|Uncoated housing and method for manufacturing same|
The present invention is an uncoated housing in which a molded product formed from a thermoplastic resin composition (d) containing 20-60% by mass of an acetone insoluble resin component (a), which contains a rubber component (a) with an average particle size of 0.05-0.3 μm and has a coefficient of linear expansion of 11×10−5-20.5×10−5, 40-80% by mass of an acetone soluble resin component (b) (here, (a)+(b)=100% by mass), and a colorant (c), with (1) the acetone soluble resin component (b) containing 6.0-45% by mass of an unsaturated nitrile monomer derived component and (2) 2-20% by mass of a component with a molecular weight of 70,000 or less by gel permeation chromatography (gpc) measurements being contained in the acetone soluble resin component (b). On the basis of jis k7105, the l* value for this uncoated housing is 13 or less, the luster 60-120%, and the haze value 30-90%..
|Graft copolymer for cation-exchange chromatography|
The invention relates to chromatographic separating materials having improved binding capacity for biological constituents in cell culture supernatants, or animal or human body fluids, in particular for monoclonal antibodies. The present invention likewise relates to the preparation of separating materials of this type, and to the use thereof, in particular for the removal of charged biopolymers from corresponding liquids..
|Sonication for improved particle size distribution of core-shell particles|
In one or more embodiments, a porous composite particulate material includes a plurality of composite particles including an acid-base-resistant core particle at least partially surrounded by one or more layers of acid-base-resistant shell particles. The shell particles are adhered to the core particle by a polymeric material.