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38results about How to "Stable integration" patented technology

Compound type piggyBac recombinant vector as well as preparation method and application of compound type piggyBac recombinant vector

InactiveCN104673815AIntegration and stabilityNo retranspositionVector-based foreign material introductionAnimal husbandryHeat shockFrame sequence
The invention discloses a compound type piggyBac recombinant vector as well as a preparation method and an application of the compound type piggyBac recombinant vector. According to the recombinant vector, a target gene expression frame, selection marker gene expression frames I and II, piggyBac transposase expression frame regulated by a heat shock promoter and truncated type piggyBac transposon arms L2 and R2 are inserted between wild type piggyBac transposon arms R1 and L1, integration of target gene, selection marker gene, piggyBac transposase expression frame sequence in silkworm genome can be conveniently mediated, complete deletion of all of transposon sequences and selection marker gene sequences in progeny transgenosis silkworm genome can be realized through establishing and screening a transgenosis silkworm line with high target gene expression and then inducing piggyBac to express in the transgenosis silkworm by heat shock treatment, replacement of other exogenous gene and the target gene can be conveniently realized through box type exchange reaction mediated by phiC31 integrase by surplus target gene expression frame anchored by attP locus, and then fixed point integration of other exogenous genes in the genome locus is further realized.
Owner:SOUTHWEST UNIVERSITY

Methods and compositions for inhibiting angiogenesis

The present invention provides a method of inhibiting angiogenesis within a tissue by providing exogenous PEDF to cells associated with the tissue. The presence of exogenous PEDF inhibits angiogenesis within the tissue, in part by interfering with the ability of vascular endothelia to expand within the tissue. The invention also provides a method for determining the severity of a tumor be assaying for the presence of PEDF within the tumor. To facilitate the inventive methods, the present invention provides pharmaceutical compositions including sources of PEDF.
Owner:NORTHWESTERN UNIV

Human blood coagulation factor IX mutant pichia pastoris expression vector and construction method and application thereof

The invention discloses a human blood coagulation factor IX mutant pichia pastoris expression vector and a construction method and application thereof. The procedures of the construction method of the human blood coagulation factor IX mutant pichia pastoris expression vector includes that according to a hFIX gene sequence, the reverse transcription-polymerase chain reaction (RT-PCR) technology is used for cloning hFIX overall length complementary deoxyribonucleic acid (cDNA) from human hepatic cells, signal peptide mixed with yeast Alpha -factor and yeast expression plasmids pPIC9K-hFIX are constructed to express pichia pastoris, and then based on that the yeast expression plasmids pPICZ Alpha A-hFIX are constructed, four saccharomycetes hFIX high-activity mutants are constructed. Cruor activity of the achieved hFIX yeast expression vector is apparently higher than that of standard hFIX. One of the mutants is through 50-litre pilot scale test of fermentation, protein purification product secretory expression quantity is 702 milligrams / litre, so that a good foundation is laid for producing efficient hFIX products used for treating hemophilia B in a low cost and industrialized mode.
Owner:WUHAN UNIV OF SCI & TECH

Transgene method for peanut

The invention discloses a process for transgene of peanuts, of which the steps include that initially repetitive somatic embryogenesis culture of the peanuts is established, then exogenous DNA or genes are constructed in a plant expression frame or an expression vector and the concentration of the exogenous DNA is extracted, purified and identified, thirdly the repetitive somatic embryogenesis culture is transformed via micro-projectile bombardment and independent resistant cell lines are screened, fourthly, plant regeneration and passage happens, and fifthly transgenic plant and transgenic molecules in the progenies is analyzed. The invention employs the repetitive somatic embryogenesis culture after which is started to be cultured for 1 to 10 months and is induced by mature peanut seeds which are stored for 0 to 6 years as a transgenic acceptor. The transgenic efficiency is high and the transformation flux is high, and the screen efficiency after the bombardment is high without escaping and chimeras. Genotype dependence does not exist in the whole process, the regeneration of the plant is easy and highly effective, transgenic descendant seeds can be abundantly obtained, and the exogenous gene is capable of stably conforming and expressing inheritance.
Owner:INST OF SUBTROPICAL AGRI CHINESE ACAD OF SCI +1

Eyedrop bottle sorting and casing system and method

The invention relates to an eyedrop bottle sorting and casing system device through a parallel four-axis robot provided with a visual system. The device comprises a working platform. A robot module, avisual system module and a workpiece platform module are arranged on the working platform. The robot module comprises the four-axis parallel robot and a control cabinet. The workpiece platform modulecomprises a photographing zone platform, a conveying belt, a charging zone and a discharging zone. The visual system module comprises a 2D camera, a light source, a computer and a visual software system. Specific to different gestures of eyedrop bottles in a detection zone, grabbing of different types is conducted, and a robot gas claw grabs the eyedrops and then sorts and cases the eyedrops. Inthe advanced manufacturing industry, the machine visual precision can be improved, the working efficiency can be improved, and the production cost is reduced.
Owner:GUANGDONG UNIV OF TECH

Genetic engineering of drought tolerance via a plastid genome

This invention provides a method of conferring osmoprotection to plants. Plant plastid genomes, particularly the chloroplast genome, is transformed to express an osmoprotectant. The transgenic plants and their progeny display drought resistance. More importantly, such transgenic plants display no negative pleiotropic effects such as sterility or stunted growth.
Owner:UNIV OF CENT FLORIDA +1

Continuous rotation electrolysis method and device for lead solution

The invention discloses a method and a device for continuous rotating electrolysis of lead solution, belonging to the field of electrolytic refining of lead. The invention continuously electrolyzes the lead solution, and the supporting device includes an electrolytic cell and an electrode plate, the electrolysis plate is circular, the anode is fixed, the cathode rotates, scrapers are arranged on both sides of the cathode plate, and the scraper is matched with the chute. The lead-containing solution enters the electrolytic cell, and the lead ions are reduced to metallic lead at the cathode. The precipitated lead is scraped off by the scraper when the cathode plate rotates to the scraper, falls into the chute, and then collects along the chute to the conveyor belt and other subsequent links. The gas is released and exits from the exhaust port at the top of the electrolyzer. The present invention continuously feeds and discharges materials during the electrolysis of lead solution, and is easy to maintain. The rotation of the cathode plate also stirs and homogenizes the electrolyte, which reduces the lead concentration gradient of the electrolyte and improves the electrolysis efficiency. The device of the present invention is a single machine The processing capacity is stable, and the production capacity can also be increased by parallel connection of multiple machines according to the production demand, which can also remain stable.
Owner:XIANGTAN UNIV

Kitchen device with suction foot

InactiveUS20160345781A1Stable integrationPrevents loose movementKitchen equipmentSuction cupsEngineeringActuator
The invention relates to a kitchen device (100) comprising: a grip (120) for manually holding the device, the grip defining a grip area (112), a first suction foot (130) attached to the device (100) and arranged to secure the device (100) to a surface (150) by 100 means of suction against the surface (150), an actuator (110) connected to the first suction foot (130) and extending in the grip area (112), the actuator (110) being arranged to transfer an actuating force (111) acting on the actuator (110) into a releasing force (131) acting on the first suction foot (130) to release the first suction foot (130) from the surface (150). This device can be released from the surface with an improved ease of use, because holding the device and releasing the device from the surface effectively have become a single, intuitive manual action by the user.
Owner:KONINKLJIJKE PHILIPS NV

Micron-nanometer structural bionic scaffold and preparation method

The invention provides a micron-nanometer structural bionic scaffold. Through the application of self-assembled collagen nano-fibers and bioactive glass nano-particles, strengthening can be performedon a scaffold respectively from the pores and the skeleton of a micron-sized silk fibroin porous scaffold, so that the micron-nanometer structural bionic scaffold strengthened on both inside and outside can be built. Through the discovery of experiments, the obtained bionic scaffold can have excellent mechanical properties, the collagen nano-fibers, the bioactive glass and silk fibroin can be stably integrated, and the osteogenesis of stem cells can be better promoted through the bionic structure of the bionic scaffold.
Owner:THE FIRST AFFILIATED HOSPITAL OF SOOCHOW UNIV

Wild type and mutant hFIX (human coagulation factor IX) Pichia pastoris expression vectors, and construction method and application thereof

The invention discloses a construction method and application of expression vectors of a wild type hFIX (human coagulation factor IX) and three hFIX mutants in Pichia pastoris. The construction method comprises the following steps: according to a gene sequence provided by Genebank, cloning a hFIX full-length cDNA (complementary deoxyribonucleic acid) sequence from healthy human liver through a RT-PCR (reverse transcription-polymerase chain reaction) technology, constructing a yeast expression plasmid pPIC9K-hFIX which is used for Pichia pastoris expression and is fused with a yeast alpha-factor signal peptide and a full-length hFIX sequence, transferring the plasmid into Pichia pastoris SMD1168, and screening out a high-level expressing yeast strain; and then, constructing a yeast expression plasmid pPICAZ-hFIX, designing and constructing three yeast hFIX high-activity mutants on this basis, electrically transferring into Pichia pastoris SMD1168, and screening out high-level expressing yeast mutant strains. The coagulation activity of each of the obtained various hFIX yeast expression vectors is higher than that of a standard hFIX. The 50L pilot fermentation research on the wild type hFIX (pPIC9K-hFIX) shows that the maximum protein purification product secretion expression quantity can be up to 558 mg / L and the purity and coagulation activity are high.
Owner:WUHAN UNIV OF SCI & TECH

Method and device for continuous electrolysis of lead solution for hydraulic unloading of lead

The invention discloses a method for lead solution continuous electrolysis of hydraulic power lead discharging and a device for implementing the method and belongs to the field of electrolytic refining of lead. Continuous electrolysis is performed on a lead solution, specifically, the lead solution is continuously conveyed into an electrolytic bath, lead obtained through electrolysis is continuously conveyed out of the electrolytic bath, electrolyte in the electrolytic bath circularly flows through a pump, and lead is separated out at a negative electrode, flushed through the flowing electrolyte to drop to the bottom of the electrolytic bath and then conveyed into a lead collecting tank through a spiral part. The device comprises the electrolytic bath and electrolytic electrode plates, wherein the electrolytic electrode plates are rectangular; both the negative electrode plate and the positive electrode plate are fixed; baffles are disposed on the two sides of the negative electrode plate; the electrolytic bath is externally connected with the circulating pump which makes the electrolyte in the electrolytic bath to circularly flow; and the bottom of the electrolytic bath is conical and is connected with the lead collecting tank through the spiral part. According to the method and the device, continuous feeding and continuous discharging are achieved in the lead solution electrolysis process, maintenance is convenient, the electrolyte circularly flows to achieve complete homogenization, the lead concentration gradient of the electrolyte is reduced, and the electrolytic efficiency is improved.
Owner:XIANGTAN UNIV
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