173results about How to "Improve proliferation efficiency" patented technology

The present invention relates to a fast reactor type coupling nuclear reaction implementation method and a nuclear reactor for same. The main contents comprise: a fast reactor type coupling nuclear reaction implementation method, a reactor modular design approach, a fast reactor type coupling nuclear reactor, a reactor core, a fuel element, a nuclear control system, and a proliferation fuel system. The fast reactor type coupling nuclear reactor mainly combusts thorium and nuclear waste, and has inherent security. The reactor main container is composed of a fission pool and a moderating pool that are completely isolated from each other but coupling to each other. A primary coolant is separated from a moderator. A thermal insulation layer is disposed between the fission pool and the moderating pool so that both can perform neutron exchange but heat exchange is blocked. Fast neutrons produced by the fission pool and moderated neutrons reflected by the moderating pool may enable the reactor core to simultaneously perform coupling nuclear reaction of the two types of neutrons. The moderating pool may be provided with the nuclear control system, and ex-core coupling core control may be implemented. The moderating pool is provided with a thorium purification fuel system, and on-line extraction of the purification fuel can be performed, and separation of nuclide is safe and simple, thereby providing a solution to the technical bottleneck of "thorium reactor".

The invention belongs to the technical field of the nuclear reactor engineering, particularly to the water-cooling two-region multiplication nuclear reactor core and the nuclear reactor adopting the same, wherein the water-cooling two-region multiplication nuclear reactor core includes a fast neutron energy spectrum area adopting the coating grain sheath fuel assembly and a thermal neutron energy spectrum area adopting the dense rod bundle fuel assembly or the coating grain sheath fuel assembly. The water-cooling two-region multiplication nuclear reactor core of the invention adopts the coating grain sheath fuel assembly, which breaks through the restrain of the stainless steel shell to the outlet scream temperature, realizes the higher coolant outlet temperature, meanwhile the fast neutron core is leaked to the thermal neutron energy spectrum core constituted by the rod bundle fuel assembly dense boom at the subcritical to be multiplied.

The invention discloses an efficient multiplication CTL preparation method killing tumors in a targeted mode. The CTL preparation method comprises the following steps: (a) removing CD4+CD25+Treg cells through immunomagnetic bead negative sorting; (b) arranging mixed cells in a serum-free medium for cultivation, and obtaining suspension cells and adherent cells; (c) adding GM-SCF and IL-4 in the adherent cells, culturing the cells for five days; in the sixth day, adding a tumour cell holoantigen, and in the seventh day, adding TNF-alpha and IL-27; (d) transferring the suspension cells to a culture flask wrapped by a CD3 monoclonal antibody and recombinant human fibronectin, adding IFN-gamma, in the second day, adding IL-2, IL-12 and the IL-27, and culturing the mixture till the eighth day to obtain CIK cells; (e) mixing the CIK cells and mature DC cells, and adding the IL-12, IL-7 and an anti-CD 28 monoclonal antibody for cultivation; in the third day, adding an anti-CTLA-4 monoclonal antibody, and then culturing the mixture for four days. According to the efficient multiplication CTL preparation method killing tumors in the targeted mode, efficiency of in-vitro CTL cell proliferation is improved, activity of killing the tumor cells in the targeted mode is improved, transformation of peripheral blood mononuclear cells to the CD4+CD25+Treg cells is inhibited.

Cell aggregate formation control and cell aggregate disintegration control are carried out with respect to cells in a culture container to increase cell proliferation efficiency. The number of the cells in the culture container is counted without disassembly of a culture system and irrespective of the density of the cells.

An external force is applied to the culture container to carry out at least one of cell aggregate formation control and cell aggregate disintegration control with respect to cells in the culture container, thus culturing the cells. The external force is applied to the culture container by pressing an agitating member onto a top surface of the culture container placed in flat orientation to a predetermined pressing degree, and moving the agitating member in a horizontal direction at a predetermined speed, thus controlling at least one of cell aggregate formation and cell aggregate disintegration with respect to the cells in the culture container. A method for counting counted targets disposed in a liquid enclosed in a container includes adjusting a thickness of at least a part of the container. At least a part of the adjusted part is set as a measurement target region. A number of counted targets in the measurement target region is counted.

A method of tissue culture and rapid propagation of healthy sugarcane seedlings comprises: detoxifying a small amount of cleaned sugarcane mature seed rhizomes with warm of 52 DEG C water for 30 minutes, accelerating germination at 38 DEG C, using auxiliary buds as explants for induction, differentiation and breeding to obtain first generation healthy seedlings, detecting ratoon stunting diseasesby means of PCR (polymerase chain reaction) to detect plantlets with negative results, obtaining a great amount of healthy sugarcane seedlings by means of multiplication culture, performing rooting cultivation, seedling adaptation and transplanting to a sand bed for temporary planting, sampling the seedlings for detecting the ratoon stunting diseases by means of PCR, proving qualification of thehealthy sugarcane seedlings, and transplanting the qualified seedlings to a large land or popularizing planting of the seedlings. The method can improve production efficiency of healthy sugarcane seedlings, twice PCR detection guarantees detoxification effect of the healthy sugarcane seedlings, the whole production process is short, propagation by multiple nursery is not needed, seedlings from tissue cultivation are directly used for production or application, the method has the advantages of high efficiency, superior quality, fastness and the like and meets large-scale factory production requirements of the healthy sugarcane seedlings.

The invention discloses a micropropagation method of fraxinus rhynchophylla and relates to the micropropagation method. The problems of long reproductive cycle, low reproduction efficiency and poor offspring genetic stability in nursery stock propagation of fraxinus rhynchophylla are solved. The method comprises the following steps of: 1, sterilizing fraxinus rhynchophylla seeds, and culturing single cotyledons of zygotic embryos to obtain cotyledonal cell embryos; 2, performing maturation cultivation on the cotyledonal cell embryos; 3, performing sprouting cultivation on the cotyledonal cellembryos subjected to maturation cultivation to obtain regenerated plants; and 4, transplanting the regenerated plants into a culture medium to culture until new leaves are completely unfolded, and removing a covered plastic thin film. The micropropagation method has the advantages of short nursery stock reproductive cycle, high reproductive rate (culturing for 60 to 70 days) and high reproductionefficiency (each explant can generate 15 to 20 somatic embryos); the germination rate of the somatic embryos is up to 87 to 89.55 percent; the transplanting survival rate of the regenerated plants isup to 75 to 80 percent; and the regeneration plants with the same good characteristics as female parents can be generated in mass.

The invention relates to asparagus parent breeding method, mainly solving the problems that rooting rate is low, root quality is poor and the survive rate of the regeneration plant is low in asparagus organ tissue culture process. The method includes the process that high quality asparagus stem section is selected, culture is carried out in culture medium solution, and asparagus seedling meeting transplant standard is bred. The culture medium solution is confected by the way that hormones corresponding to various culture stages are added on the basis of the basic culture medium solution, the culture includes induction culture, propagation culture, rooting pre-differentiation culture and rooting culture sequentially. Compared with the existing organ culture, the invention has high propagation rate, rooting rate reaches 100%, root system quality is good, and differentiation rate of strong fleshy tap root is improved to 96%, thus ensuring survival rate after transplantation.

A set of Sinkiang drug mulberry tissue culture and rapid propagation culture medium comprises the following components: a germination culture medium, a multiplication culture medium, an extension culture medium and a root culture medium, wherein the germination culture medium is prepared from the following raw materials: MS 4.33 g/L, 6-BA 2.0 mg/L, NAA 0.2 mg/L, sugar 30 g/L and agar 7 g/L, and the pH value of the germination culture medium is 5.8; the multiplication culture medium is prepared from the following raw materials: MS 4.33 g/L, 6-BA 1.0 mg/L, sugar 30 g/L and agar 7 g/L, and the pH value of the multiplication culture medium is 5.8; the extension culture medium is prepared from the following raw materials: MS 4.33 g/L, ZT 4.5 micro-mol/L, sugar 30 g/L and agar 7 g/L, and the pH value of the extension culture medium is 5.8; and the root culture medium is prepared from the following raw materials: WPS 2.30 g/L, L+NAA 0.2 mg/L, IBA 0.2 mg/L, activated carbon 0.4 g/L, sugar 20 g/L and agar 6 g/L, and the pH value of the root culture medium is 6.0. The culture medium is simple and convenient to prepare, and is high in multiplication efficiency, each seedling can differentiate 2.3 lateral buds averagely, the transplanted seedlings are got by winter buds after four months, and the survival rate after transplantation is high to more than 75%.

The invention discloses a method for establishing a new lycoris variety 'Taohong' tissue culture rapid-propagation technical system. According to the method, bulb blocks are taken as explants, the explants are disinfected, and the 'Taohong' tissue culture rapid-propagation technical system is established after adventitious bud induction, cluster bud induction, bud hardening, seedling hardening androoting culture, seedling hardening and transplanting steps. Compared with other original species of lycoris, when the rapid-propagation technology system is adopted to cultivate a new lycoris variety 'Taohong', the characteristic is utilized that the new lycoris variety is more resistant to high-concentration plant growth regulators, and the high-concentration plant growth regulators are used atbud induction and bud proliferation stages so that a bud germination period can be shortened, and the bud proliferation efficiency can be improved. By adopting the tissue culture rapid-propagation technology, the propagation coefficient and propagation speed of the new lycoris variety can be greatly improved, and a technical foundation is laid for application and popularization of the new lycorisvariety.

The invention belongs to the field of ornamental plant transgenic technology, particularly relates to a method for culturing transgenic dianthus and more particularly discloses a method for culturing transgenic dianthus by taking agrobacterium-mediated embryogenic callus of the dianthus as a material. The method comprises the following steps of embryogenic callus induction, genetic transformation, screening and regeneration, GUS (glucuronidase) coloration detection and PCR (polymerase chain reaction) detection. The method is characterized in that the GUS report gene and the ACO target gene are introduced into the receptor which is the embryogenic callus of the ianthus through agrobacterium mediation, different factors affecting the embryogenic callus transformation are screened, kanamycin or hygromycin is used as a screening agent to screen the transformed embryogenic callus, and the screening is carried out through GUS coloration, PCR detection and other auxiliary methods to obtain the transgenic dianthus. The invention provides a novel technology platform for the innovation of the germplasm resources for the genetic transformation of the dianthus.

A bryophyte tissue culture and seedling culture method based on direct spore induction comprises the steps of sporophyte selection and pretreatment, spore collection, spore direct disinfection, sporegermination induction, subculture mulitiplication of spores and protonemata, oscillatory differentiation culture, spray inoculation and seedling culture. According to the method, establishment efficiency and proliferation efficiency of a sterile system are improved, death rate and pollution rate are low, and effective seed feeding rate, subculture proliferation rate and seedling coverage rate after transplantation are high. Compared with the prior art, the tissue culture seeding death rate is reduced by 6.5%, the pollution rate is reduced by 70.4%, and the effective seeding rate is increased by 45.4%. The subculture proliferation rate is increased by 2.63 times, and the coverage rate of bryophyte plants cultured from seedlings reaches 85.6% on average.

The invention discloses a method for embryogenic cells of anthurium scherzerianum to quickly proliferate and regenerate a plant. By changing medium components, light condition and subculture interval of suspension culture in the prior art, an embryogenic cell cluster can proliferate 2.82-3.02 times per week and proliferate 83 times per month, the proliferation efficiency is improved by more than 15 times compared with that in the prior art, the plant regeneration operating process is simplified, and the plant regeneration of the embryogenic cell cluster can be completed by only one step; meanwhile, the plant regeneration time is shortened, and is 6-10 weeks, which is over 20 days shorter than that in the prior art.

The invention provides a canine parvovirus proliferation method. According to the method, F81 cells are creatively taken as host cells of canine parvovirus, so that virus proliferation is facilitated especially; a riptide-type bioreactor is adopted, so that compared with conventional spinner bottle modes, processes are easier to control, and products are more stable in quality; a microcarrier culture mode is adopted, so that a culture solution can be utilized fully, growing characteristics of adherent cells are maintained, and high-density culture effect is realized. In addition, aiming at own characteristics of the F81 cells and the canine parvovirus and culture environment of the bioreactor, specific culture conditions are matched, and components of the culture solution, inoculation amount and condition parameters are designed in an optimized manner, so that canine parvovirus proliferation efficiency is improved remarkably. Protruding technological effect is realized through an ingenious technological concept, and the method is low in cost and easy in realization and has outstanding popularization prospect.

The invention provides a method for quickly propagating seedlings of Dendrobium spp. by tissue culture. The method uses new buds of Dendrobium spp. as explants to arrive at quick propagation by means of induction of cluster buds and growth of buds from buds. The method comprises the steps of selecting explants, sterilizing the explants, subjecting cluster buds to induction culture, subjecting the cluster buds to enrichment culture, performing rooting culture, and transplanting test tube seedlings. The seedlings of Dendrobium spp. can be acquired by using the method just in 5-6 months; induction rate in the propagation process is high, subsequent rooting culture after the propagation can be performed without strong seedling culture, the culture links are simplified, culture cost is reduced, multiplication efficiency is high, and the efficiency of the whole seedling culture is improved; in addition, the test tube seedlings cultured herein grow robust with developed roots, and may gain high environmental adaptability through acclimatization, so that seedling transplanting survival rate is increased.

The invention discloses a culture medium for culturing urine-derived cells, and belongs to the field of cell culture. The culture medium contains human blood platelet lysates. The culture medium has the advantages that the fact that the human blood platelet lysates can be used as core additives for the heterology-free urine-derived cell culture medium is ultimately confirmed via extensive screening experiments by applicants over the years, and accordingly the problems of extremely low urine-derived cell proliferation speeds, gradual cell death and the like during heterology-free culture in thepast can be solved by the aid of the culture medium; the human blood platelet lysates are added in the heterology-free culture medium, the urine-derived cells can be effectively cultured by the aid of the heterology-free culture medium, and the requirements of research or clinical application on the cell quantities can be met; the blood platelet lysates are innovatively applied to urine-derived cell heterology-free culture and the culture medium, and the culture medium has important significance in regenerative medicine.

The invention discloses a culture medium for efficiently culturing umbilical cord blood CIK cells in vitro and a culture method thereof, which belong to the technical field of biology. The culture medium is prepared from the following components: an AlyS505N-0 serum-free basal culture medium, a cytokine composition A and a natural traditional Chinese medicine extract. The culture method comprisesthe following steps: collecting and separating umbilical cord blood mononuclear cells; resuspending cells, adding IFN-gamma for activation, incubating in a 6% CO2 incubator at 37 DEG C, adding the cytokine composition A for stimulation on the next day, supplementing the culture medium containing a traditional Chinese medicine extract B after 3-5 days, supplementing the culture medium containing the traditional Chinese medicine extract composition B every 2-3 days during culture, and co-culturing for 15-17 days to obtain a large number of CIK cells. According to the culture medium and the culture method thereof, a large number of CIK cells can be proliferated, and CD3+CD56+ double positive cells in the cells can reach 70% or above.