49 results about "Diethyl pyrocarbonate" patented technology

The invention provides a preservative composition of blood DNA. The preservative composition of blood DNA comprises, by weight, 20 to 50 parts of a preservative, 5 to 15 parts of an anticoagulant, 0.5 to 5 parts of a nuclease inhibitor, 1 to 5 parts of a metabolic inhibitor and 40 to 70 parts of water, wherein the nuclease inhibitor comprises one or more of diatomite, bentonite, ethyl alcohol, formamide, vanadyl-ribonucleoside complex, dithioerythritol, diethyl pyrocarbonate, proteinase-K, heparin, beta-mercaptoethanol, hydroxylamine-O-copper ions, ammonium sulfate, dithiothreitol, cysteine, and 4-formylbenzoic acid and oxovanadium Schiff base complex.

The invention discloses a method for separating RNA (Ribonucleic Acid) from a human serum/blood plasma sample, which sequentially comprises the steps of: 1, pretreating; 2, adding a Trizol reagent into the pretreated sample in an RNase-free centrifuge tube, uniformly mixing, standing at room temperature; 3, extracting chloroform; 4, adding isopropanol into the centrifuge pipe obtained from the step 3, uniformly mixing, standing at room temperature, centrifuging to obtain white sediment, washing and centrifuging the white sediment, and discarding supernatant; and 5, airing the sediment obtained from the step 4, adding diethyl pyrocarbonate for treating water to ensure that the sediment is dissolved to obtain a purified serum/blood serum RNA sample. The invention also discloses a method forcarrying out RT (Reverse Transcriptase)-fluorescence quantitative PCR (Polymerase Chain Reaction) verification by using the RNA obtained by the steps. The RNA with high quality and content can be effectively obtained by adopting the method of the invention.

The invention provides a blood virus RAN protective agent and a blood sampling tube. The blood virus RAN protective agent is prepared by dissolving the following components in DEPC (diethyl pyrocarbonate) solution 100-500mg/ml glycine, 1-5mg/ml aprotinin, 1-5mg/ml wortmannin, 10-40mg/ml glutathione, 100-500mg/ml sodium thiocyanate, 1-3mg/ml anticoagulant and 5-20mg/ml membrane protective agent. The blood virus RAN protective agent provided by the invention is capable of supplying long-term protection to virus RNA in blood under room temperature, preventing degradation and pollution of virus RNA and effectively guaranteeing accuracy and validity of blood sample.

The invention relates to a kit for diagnosing the reovirus genes of grass carps, comprising an RNA (Ribonucleic Acid) extraction reagent for viruses in visceral tissues, an RAN extraction reagent for cell infecting viruses, an RT (Reverse Transcriptase) reaction reagent and a PCR (Polymerase Chain Reaction) reaction reagent, wherein the RNA extraction reagent for the viruses in the visceral tissues comprises the components of DEPC (Diethyl Pyrocarbonate) water, protease K (1 mg/mL, pH is 8.0), SDS (Sodium Dodecyl Sulfate) (1%), phenol/chloroform/isoamylol (25/24/1), chloroform/isoamylol (24/1), isopropanol and 70% ethanol; the RAN extraction reagent for the cell infecting viruses comprises the components of Trizol, chloroform, isopropanol, 70% ethanol and the DEPC water; the RT reaction reagent comprises the components of 5*AMV Buffer, dNTP, the DEPC water, a reverse primer R1, an RNA enzyme inhibitor RNAsin (R1) and a reverse transcriptase AMV; and the PCR reaction reagent comprises the components of 10*PCR buffer (containing Mg<2+>) and DNTP Mixture (which are respectively 2.5 mmol/L), a specific oligonucleotide primer F1, the primer R1, the DEPC water and Taq E (5U/muL), the forward primer F1:5'-ATCCCGTATATCTATGGCTT-3', and the reverse primer R1:5'TTGGAGACGAACATAGACGC-3. The kit is used for diagnosing the reovirus genes of the grass carps.

The invention relates to an optimized method for extracting total RNA of a plant material, which comprises the steps of: 1, grinding a fresh plant material into fine powder under a liquid nitrogen condition, and transferring to a centrifuge tube containing a cell lysing solution; 2, adding a protein-DNA settling solution in the centrifuge tube in the step 1; 3, transferring supernate to a new centrifuge tube, and adding isopropanol; 4, discarding the supernate, washing sediments with alcohol, drying in air, and adding a DNA enzyme I solution diluted with DEPC (diethyl pyrocarbonate) water; 5, adding the DEPC water and a guanidine hydrochloride solution; 6, transferring the supernate to the new centrifuge tube, and adding LiCl solution; and 7, centrifuging, washing with alcohol, drying in air, and dissolving in the DEPC water for storing at low temperature. The invention has the advantages of simple operation steps, convenience of operation and no need of extracting the total RNA with conventional organic solvents (phenol and chloroform), thereby preventing polluting the environment without hurting a human body.

The present invention relates to an one-step method ribonucleic acid extraction reagent EZRNA. Its formula includes (by 1 L total amount) guanidinium isothiocyanate 3-5 M, sodium citrate 18-25 M, sodium laurate (by wt%) 0.3-0.6%, 2-mercaptoethanol 0.6-1.2 M and balanced acidic phenol (by volume%) 40-55%. Besides, said invention also provides the concrete steps of the invented one-step method ribonucleic acid extraction process by using said reagent.

The invention discloses a reagent kit, a method, primers and a probe for quantitative detection of nucleic acid of a swine fever virus and belongs to the technical field of biology. The reagent kit comprises PCR (polymerase chain reaction) liquid including DEPC (diethyl pyrocarbonate) treating water, Taq enzyme, M-MLV reverse transcriptase, RNase inhibitor, dNTP Mix, 10X one-step RT-PCR (reverse transcription-polymerase chain reaction) Buffer, MgC12 solution, the forward primer of the swine fever virus, the reverse primer of the swine fever virus and the LNA (locked nucleic acid) probe of the swine fever virus, wherein the forward primer of the swine fever virus refers to: 5'-AACGGYAGTGCTTTCTAYC-3', the reverse primer of the swine fever virus refers to: 5'-GTGGRAAAGGCTTCTCTC-3', and the LNA probe of the swine fever virus refers to: 5'-accActTctGtyCtac-3'. The reagent kit further comprises RNA (ribonucleic acid) extracting solution, negative quality control serum, working standard serum, positive quality control serum and critical positive quality control serum. The real-time fluorescent quantitative PCR technology is used for quantitatively detecting the nucleic acid of the swine fever virus, and accordingly the reagent kit has the advantages of specificity, sensitivity, rapidness and simplicity and convenience to operate.

The invention relates to a rapid extraction kit for animal tissue genome RNA and an extraction method and application. The rapid extraction kit comprises lysate, flushing liquid 1, flushing liquid 2, absolute ethyl alcohol and a diethyl pyrocarbonate solution; when in extracting, solid animal tissue is milled, and liquid animal tissue is directly extracted; after a sample is cracked, the genome RNA can be absorbed to an RNA absorbing column, and then the diethyl pyrocarbonate solution is used for flushing to obtain the complete genome RNA. The kit is applicable to extraction and purifying of the genome RNA of the animal tissue; the whole extraction costs 5 minutes; the extraction efficiency is high, and the detection sensitivity is high; reliable experience basis is provided to early diagnose various RAN bacteria or viral pathogen infection. The kit is applicable to all research and development institutions, clinical pathogen detection, molecular genetics research, clinical gene diagnosis, animal disease diagnosis and disease control centers, and has a wide market prospect and high economic benefit.

The invention discloses a method of synthesizing retigabine. The method comprises the following steps: carrying out catalytic hydrogenation on a raw material 2-amino-4-(4-florobenzyl amino)-1-nitrobenzene in a reaction solvent by taking Pd/C as a catalyst; filtering a reaction liquid; and adding diethyl pyrocarbonate into the filtrate to carry out condensation reaction to obtain retigabine. The method disclosed by the invention connects Pd/C catalytic hydrogenation and acylation in series, so that the method is simple in line operation, reduces the cost and improves the safety. The yield of the method disclosed by the invention for synthesizing retigabine reaches 48% which is remarkably improved compared with that reported at present, so that the method has a good industrial application prospect.

The invention discloses a high-stability DFN packaging device. An epoxy insulator of the high-stability DFN packaging device comprises the following raw materials in parts by weight: 80-100 parts of epoxy resin, 50-70 parts of linear phenolic resin, 12-18 parts of liquid nitrile rubber, 3-8 parts of diethyl pyrocarbonate, 65-90 parts of silica powder, 0.1-1.5 parts of octylphenylpolyethylene glycol, 2-5 parts of 3-aminopropyltriethoxysilane, 2-6 parts of cellulose acetate butyrate, 0.3-2 parts of 5-fluoro-2-methoxyaniline, 0.5-5 parts of 2,4,6-tri(dimethylamiomethyl)phenol, 1-5 parts of a release agent and 10-25 parts of a flame retardant. The high-stability DFN packaging device is excellent in heat dissipation effect and mechanical property and is stable and reliable in packaging structure, thereby having a wide application prospect.

The invention discloses a hepatitis B virus Adefovir dipivoxil drug-resistant nucleic acid quantitative detection reagent kit, a detection method, primers and probes thereof. The reagent kit contains fluorescence quantitative PCR (Polymerase Chain Reaction) reaction liquid, including DEPC (Diethyl Pyrocarbonate) treated water, DNA (Deoxyribose Nucleic Acid) polymerases with the 5'->3' exonucleolytic activity, dNTPs (Deoxyribonucleotide Triphosphates), 10*fluorescence quantitative PCR Buffer, solution containing Mg2+ions, rt181 site forward primers, rt181 site reverse primers, rt181A site probes, rt181V site probes, rt181T site probes as well as rt236 site forward primers, rt236 site reverse primers, rt236N site probes and rt236 site probes peculiar to a rtN236T detection reagent kit; and DNA extracting solution, negative controls, working standards, positive controls and critical positive controls are also contained in the reagent kit. According to the detection method, the fluorescence quantitative PCR (Polymerase Chain Reaction) technology is adopted for quantitatively detecting hepatitis B virus Adefovir dipivoxil drug-resistant strains; according to the fluorescence quantitative PCR (Polymerase Chain Reaction) method, the step of PCR (Polymerase Chain Reaction) extension is avoided; and the probes can mark a variety of fluorescent marks; and meanwhile, the reagent kit has the advantages of specificity, sensitivity, quickness and convenience in operation.

The invention discloses a method for preparing a DFN package device with high thermal conductivity, comprising the following steps of: S1, uniformly mixing silicon micro-powders and a flame retardantwith 3-aminopropyltriethoxysilane for surface treatment; S2, adding epoxy resin, linear phenolic resin, liquid nitrile rubber, diethyl pyrocarbonate, polyethylene glycol monooctyl phenyl ether, cellulose acetate butyrate, 5-fluoro-2-meth-oxyaniline, 2,4,6-tris(dimethylaminomethyl)phenol and a release agent, and uniformly mixing the same; and S3, mixing the mixture at 90-110 degrees centigrade for3 to 5 minutes, cooling, pulverizing and sieving a product. The DFN package device with high thermal conductivity prepared by the method has a low incidence rate of internal pores, and avoids electrical property failure due to the deterioration of the thermal conductivity caused by the pores.

The invention provides a cell storage liquid having simple composition and aiming at maintaining nucleic acid stability in the cells, and a method for preparing a cell and sputum reference product byusing the cell storage liquid. The cell storage liquid is prepared from 75 percent ethanol, 0.9 percent of sodium chloride, 4 percent RNAsecure and the balance of diethyl pyrocarbonate treatment water. The method has the advantages that the cost is low; the preparation method is simple; no toxic and side effects exist. By using the method, the normal cell form can be maintained under the normal temperature condition (20 DEG C); meanwhile, the nucleic acid completeness in the cells can be effectively protected. The invention aims at providing a reference method for the preparation of a reference product of a nucleic acid detection type product of sputum or other tissue samples.

The invention belongs to the field of biotechnology and relates to a real-time fluorescent quantitative PCR kit for detecting the mRNA expression level of 17 beta-hydroxysteroid dehydrogenase 7 (17 beta-HSD7) in human prostate cancer samples. The kit contains 2 * reverse transcription reaction solution, 20 * reverse transcriptase, water treated by diethyl pyrocarbonate, 2 * polymerase chain reaction solution, 20 * primers and fluorescent probes for detection and a standard product. The invention establishes a method for utilizing the Taqman technology for detecting the expression of the 17 beta-HSD7, and the detection practices prove that the kit and the detection method are feasible. As the method adopts the PCR amplification technology, the method can greatly improve the detection sensitivity of the 17 beta-HSD7 and obtain enough information in a very small number of samples; due to the application of the fluorescent probes, the specificity is also greatly improved and the false positive rate of the conventional PCR amplification is reduced.

The invention discloses a plant mRNA (messenger ribonucleic acid) extraction method, belongs to the technical field of molecular biology, and particularly relates to the technical field of extracting mRNA from plant materials through acupuncture needles.The plant mRNA extraction method is provided to solve the problems of operation complexity, low efficiency and damage to plant materials in conventional mRNA extraction methods.The plant mRNA extraction method includes 1, treating an acupuncture needle; 2, putting the dried acupuncture needle into a mixed solution of trimethoxysilane, xylene and diisopropylethylamine for incubation; 3, embedding the acupuncture needle to enable poly-thymine to be adsorbed to the surface of the acupuncture needle; 4, autoclaving the embedded acupuncture needle subjected to ultrapure water elution; 5, punching the naturally dried acupuncture needle into a test position of a target gene of a tender plant material, keeping the acupuncture needle at the test position for 1-3 minutes, pulling out the acupuncture needle, and putting the acupuncture needle into a PCR (polymerase chain reaction) tube of diethyl pyrocarbonate water to complete plant mRNA extraction.The plant mRNA extraction method has the advantages that total RNA extraction is not needed, the mRNA can be extracted from the plant materials in 1-3 minutes, and simplicity, convenience and rapidness of the operation process are achieved.

The invention provides a kit used for RNA extraction and an extraction method thereof. The kit used for RNA extraction comprises diethyl pyrocarbonate, sterile double distilled water, guanidinium isothiocyanate, sodium dodecyl sulfate, polyvinylpyrrolidone, beta-mercaptoethanol, NaAC, phenol water, chloroform-isoamylol, ethyl alcohol, glycerinum and sorbitol. By means of the technical scheme, thekit has the advantages that the design is reasonable, tissue RNA of the human bodies, mice and tobaccos can be well extracted, the extraction steps are simple, the cost is low, and the kit is easy towide apply. The required RNA sample size is low, the RNA extraction rate is high, the integrity of RNA obtained through extraction is very high, and the kit is completely suitable for downstream research work, such as sequencing, RT-PCR and N-count.