58results about How to "Efficient separation and extraction" patented technology

The invention refers to a method of preparing the polymeric tetramethylene ether glycol (PTMEG), and the method which uses the mixed polyacid as the catalyst, makes the tetrahydrogenic furan initiate the open-loop polymerization by the positive ions, and gets the products of polymeric tetramethylene ether glycol (PTMEG) of the specific relative molecular weight, jand the extraction technique adopts the new-type extracting agent toluene and the equipment realizing the above mentioned method has the reactor of the external-cycled detecting system of the molecular weight, the pilot-flow board, the middle pilot-flow tube and the extractor in the bottom subsidence region. It can produce the PTMEC whose molecular weight and molecular weight distribution accord with the requirements, by giving the protons in the reactor strict monitoring for the body water yield.

The invention provides a centrifuging micro-fluidic control chip for free nucleic acid extraction and a method for extracting free nucleic acid, and belongs to the technical field of free nucleic acidseparating and extracting devices. The centrifuging micro-fluidic control chip comprises a disc, plasma separating chambers, nucleic acid extraction sample cavities, immiscible phase cavities and eluting cavities, wherein the plasma separating chambers, the nucleic acid extraction sample cavities, the immiscible phase cavities and the eluting cavities are in rotary symmetric distribution; each plasma separating chamber communicates with the corresponding nucleic acid extraction sample cavity through a corresponding passive siphon; and each nucleic acid extraction sample cavity communicates with the corresponding immiscible phase cavity and the corresponding eluting cavity through arch capillary microchannels. According to the centrifuging micro-fluidic control chip disclosed by the invention, a dynamic centrifuging micro-fluidic control method and a static immiscible phase micro-fluidic control method are combined for the first time, and the designed immiscible phase nucleic acid extracting and purifying structure realizes uniform mixing under the premise that the interface stability is not influenced; the plasma separating structure is integrated on the centrifuging micro-fluidiccontrol chip, so that the purpose of extracting and purifying free nucleic acid from 4mL whole blood fully-automatically within 15 minutes can be realized, the centrifuging micro-fluidic control chipis the fastest device for extracting and purifying the free nucleic acid from the whole blood at present, and the centrifuging micro-fluidic control chip is hopefully applied to liquid biopsy of thefree nucleic acid.

The invention provides an extraction and detection method of opioid matters in hair. The method comprises the following steps of extraction and purification of hair. The extraction method further comprises a derivation step. The invention further provides a method for detecting the opioid matters in hair by adopting a gas chromatograph-mass spectrometer or a liquid chromatograph mass spectrometer. Compared with conventional hair poison residue detection methods, the method provided by the invention is very mild but can enrich opioid matters effectively and effectively remove various impurity interferents in a hair detection material, has higher sensitivity and accuracy, and can be used by law-enforcing departments, inspection departments and drug test mechanisms of government.

A process for production of Si, characterized by adding an oxide, hydroxide, carbonate or fluoride of an alkali metal element, or an oxide, hydroxide, carbonate or fluoride of an alkaline earth metal element, or two or more of such compounds, to solid SiO in a total molar amount of from 1 / 20 to 1000 times with respect to the moles of solid SiO, heating the mixture at between the melting point of Si and 2000° C. to induce a chemical reaction which produces Si and separating and recovering the Si from the reaction by-product, for the purpose of inexpensively and efficiently producing Si from various forms of solid SiO with no industrial value produced from Si production steps and the like.

The invention discloses a method for preparing chondroitin sulfate and collagen polypeptide from animal cartilages, which comprises the following steps: crushing animal cartilage materials to obtain cartilage powder; hydrolyzing the cartilage powder with protease, and then carrying out ultrafiltration and concentration to obtain a concentrated solution; passing the concentrated solution through an anion exchange resin column, and collecting an effluent solution A; eluting with pure water, and collecting a water washing solution B; merging the effluent solution A and the water washing solution B, carrying out ultrafiltration and concentration, and carrying out spray drying to obtain the collagen polypeptide; and eluting the anion exchange resin column with an NaCl solution, carrying out ultrafiltration and concentration on the eluent solution, carrying out alcohol precipitation, dehydrolyzing, and drying to obtain the chondroitin sulfate. The invention realizes the high-valued utilization of cartilage resources, can simultaneously and efficiently extract and separate the chondroitin sulfate and the collagen polypeptide, increases the added values of the products and reduces the environment pollution.

The invention discloses compound type degreasing liquid for extracting egg yolk immune globulin and an application thereof. The compound type degreasing liquid for extracting the egg yolk immune globulin comprises the following components in percentage by weight: 0.05-0.2% of pectin, 0.01-0.15% of polysaccharide, 3-10% of ammonium sulfate and the balance of water, wherein polysaccharide is selected from one of carrageenan, carboxymethyl cellulose, methyl cellulose and dextran sulfate. The compound type degreasing liquid and ammonium sulfate are used for separating and purifying the IgY in the egg yolk, the extraction content of the obtained IgY is high, the purity of the IgY is relatively high, and the activity of the IgY is kept good. The IgY with the relatively high purity can be obtained by adopting the method only through twice centrifugation; the production cost and time are substantially reduced; favorable conditions are provided for large-scale industrial production of IgY extraction.