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32 results about "Subculture (biology)" patented technology

In biology, a subculture is a new cell or microbiological culture made by transferring some or all cells from a previous culture to fresh growth medium. This action is called subculturing or passaging the cells. Subculture is used to prolong the life and/or expand the number of cells or microorganisms in the culture.

Efficiency and rapid transgenic method for chrysanthemum

The invention discloses an efficiency and rapid transgenic method for chrysanthemum, belonging to the fields of genetic breeding of the chrysanthemum and molecular biology. The method comprises the following steps: (1) selecting a chrysanthemum stem as an explant, and carrying out pre-culturing on a pre-culturing medium; (2) activating and culturing recombinant expression vector transformed agrobacterium liquid, enriching thalli, and carrying out resuspension by virtue of an MS liquid culture medium, so as to obtain infection liquid; (3) soaking the explant pre-cultured in the step (1) into the infection liquid, and carrying out infection by virtue of a vacuum negative pressure method; and (4) putting the infected explant onto the pre-culturing medium, carrying out co-culturing in a dark condition, carrying out decarboxylation culture on a decarboxylation culture medium, finally, sequentially carrying out selective culture by virtue of a selective culture medium 1 and a selective culture medium 2, when determining that agrobacterium does not outbreak, carrying out subculture on a root culture medium, and carrying out further rooting screening, so as to obtain genetic chrysanthemumplants. Compared with a traditional leaf-disc-method transgenic method for the chrysanthemum, the method has the advantages that the transgenosis time is remarkably shortened, the conversion efficiency of transgenosis of the chrysanthemum is increaed, the workload of science researchers is reduced, a new way is provided for the efficient conversion and gene function analysis of the chrysanthemum,and a new thought is provided for the transgenosis of other plants.
Owner:NANJING AGRICULTURAL UNIVERSITY

Establishment method of turbot hepatic parenchymal cell line and turbot hepatic parenchymal cell line

The invention relates to an establishment method of turbot hepatic parenchymal cell line and the turbot hepatic parenchymal cell line. The establishment method of the turbot hepatic parenchymal cell line comprises the following steps: obtaining turbot liver tissue; cutting the liver tissue into tissue blocks, and carrying out washing; carrying out digestion treatment by adopting type 4 collagenase, and carrying out washing again; carrying out digestion treatment on the tissue blocks obtained after the digestion treatment by adopting trypsin again; adding a primary complete medium to terminate digestion to obtain treated tissue blocks; uniformly attaching the treated tissue blocks into a culture bottle, placing the attached culture bottle into an incubator at 23 DEG C for 6 hours; inverting the culture bottle for 6 hours; adding 4 ml of a primary complete culture medium after the culture bottle is upright; performing primary culture; and then, performing subculture. The turbot hepatic parenchymal cell line established by the method can realize continuous passage so as to provide a large number of turbot hepatic cells; and the established stable and sustainable turbot hepatocyte line can be applied to the molecular cell biology research of turbot nutrition metabolism, thereby overcoming defects in the prior art at the cellular level.
Owner:OCEAN UNIV OF CHINA

Method for rapidly breeding seedlings by using alpinia katsumadai stem tips

The invention belongs to the technical field of agricultural biology, and relates to a method for rapidly breeding seedlings by using alpinia katsumadai stem tips, which comprises the processes of induced differentiation of adventitious buds, subculture multiplication, rooting induction, transplanting and management. According to the method, the technological process is simple, the adventitious buds are directly induced and differentiated by taking bamboo shoot buds or stem tips of non-flowering tillering plants as explants, the adventitious buds are subjected to subculture multiplication to form clumpy buds, the adventitious buds are rooted and transplanted, a large number of healthy and high-quality seedlings capable of being used for production and cultivation can be obtained in a short time, the period is short, the obtained seedlings are consistent in physiological age, and the yield is high. The alpinia katsumadai seedlings grow neatly, are suitable for industrialized seedling production and large-scale cultivation, meet the requirements of artificial planting for excellent seedlings, and play an important role in promoting development and utilization of alpinia katsumadai and protecting wild resources.
Owner:TROPICAL CORP STRAIN RESOURCE INST CHINESE ACAD OF TROPICAL AGRI SCI

Preparation method of stem cell factor oral product

The invention discloses a preparation method of a stem cell factor oral product, and relates to the technical field of biology. The preparation method comprises the following steps of obtaining primary bovine umbilical cord mesenchymal stem cells; carrying out subculture on the primary bovine umbilical cord mesenchymal stem cells; when the P3-P5-generation bovine umbilical cord stem cells are cultured until the cell fusion degree reaches 80-90%, adopting a secretion-promoting culture solution for culture, collecting a supernate after culture is conducted for 48 h, filtering the supernate with a 0.1-micron filter membrane, and performing ultrafiltration and concentration to obtain a concentrated solution, wherein the secretion-promoting culture solution comprises a basic culture solution, and glutamine, noradrenaline, transforming growth factors, glucosamine and astragalus polysaccharide which are added into the basic culture solution; and pre-freezing the concentrated solution, and then carrying out ultralow-temperature freeze drying to obtain freeze-dried powder. According to the invention, the amplification of the umbilical cord mesenchymal stem cells can be effectively improved, the secretion of stem cell factors can be induced, and the obtained product can condition the body from the cellular level, comprehensively improve the body function, improve the sub-health and repair and strengthen the immune system.
Owner:安徽科门生物科技有限公司

A kind of construction method of barb barb fin cell line

The invention relates to a construction method of a cell line of a fin of spinibarbus hollandi. The construction method comprises the following steps of 1), acquisition of the fin of the spinibarbus hollandi: jointly sterilizing a fish body by adopting methylene blue and ethyl alcohol; 2), primary culture: carrying out the culture by adopting a DMEM (Dulbecco's Modified Eagle Media) / F12 or L-15 culture solution containing a cell growth factor, fetal bovine serum, penicillin, streptomycin, gentamicin and amphotericin B; 3), subculture: when handing to an eighth generation, changing a cell culture solution to a basal culture solution, so that the cell line of the fin of the spinibarbus hollandi is established successfully. The cell line of the fin of the spinibarbus hollandi, which is obtained through the construction method provided by the invention, can be used for realizing continuous passage, is directly applied to biological characteristic research, can be used for meeting the demands of the germplasm-resource storage and the theoretical research of an economic species of the spinibarbus hollandi, can also be repeatedly freeze-thawed, and can be applied to the important research of cell biology, virology, toxicology, molecular biology, genetics, immunology and the like.
Owner:KUNMING INST OF ZOOLOGY CHINESE ACAD OF SCI

Populus alba xP .berolinensis hormone autotrophic cell line capable of realizing plant regeneration

The invention belongs to the technical field of plant biology, and mainly provides a populus alba xP .berolinensis hormone autotrophic cell line capable of realizing plant regeneration. A suspension culture system and an adventitious bud differentiation and rooting plant regeneration system are established; callus is induced from populus alba xP .berolinensis pollen in a mononuclear edging stage in an MS culture medium added with 2 mg/L of 2,4-D, 0.5 mg/L of KT, 30g/L of sucrose and 7.5 g/L of agar, and continuous subculture is carried out for 5 times to obtain light yellow callus with loose texture and vigorous growth; the callus still can rapidly grow in an MS culture medium only containing 30 g/L of sucrose and is the hormone autotrophic cell line; after the hormone autotrophic cell line is inoculated into a 150 mL glass triangular flask containing 50 mL of a MS liquid culture medium with 50 g/L of sucrose for suspension culture for 18 days, the growth amount is increased by about 9.2 times; culturing is carried out in an MS culture medium added with 0.05 mg/L of TDZ, 25g/L of sucrose and 7.5 g/L of agar for 3 months, and inducing is carried out to form a large number of adventitious buds; and the adventitious buds are inoculated into a rooting culture medium to be cultured for 30 days, rooting of the adventitious buds is achieved, and regenerated plants are formed.
Owner:NORTHEAST FORESTRY UNIVERSITY

Infectious clone of human cytomegalovirus and its construction method and application

ActiveCN105713866BDirect observation of expressionSmall molecular weightMicrobiological testing/measurementViruses/bacteriophagesCytomegalovirus infectionsWild type
The invention relates to the technical field of biology, and in particularly relates to human cytomegalovirus (HCMV) infectious clone as well as a construction method and applications of the HCMV infectious clone. The construction method comprises the following steps: inserting green fluorescent protein into BAC, thus obtaining a BAC carrier with GFP; taking a wild-type HCMV Han viral genome as a template, carrying out PCR amplification on left and right homologous recombination arms of the template, carrying out purification and digestion on the product, carrying out connection and PCR amplification, connecting the full-length sequence of the left and right homologous recombination arms with the BAC carrier with the GFP, carrying out digestion and linearized transfection on HEL cells infected with the wild-type HCMV Han viruses, carrying out subculture, and extracting the total DNA of the cells; and electro-transforming the total DNA into competent cells, and culturing in a resisting culture medium. The biological properties of the recombinant viruses generated by the infectious clone are similar to that of the wild-type viruses, and the infection condition of the infectious clone of the viral strains in the cells is observed through the expression of GFP reporter genes.
Owner:WUHAN INST OF VIROLOGY CHINESE ACADEMY OF SCI

Tissue culture and rapid propagation improvement method and device for sunshine rose grapes

PendingCN114680043ASolve the problem of time-consuming and low efficiencyEasy to carryHorticulture methodsPlant tissue cultureSubculture (biology)Seedling
The invention relates to the technical field of biology, in particular to a sunshine rose grape tissue culture and rapid propagation improvement method and device. The explants are disinfected; carrying out primary culture on the disinfected explants to obtain robust bud seedlings; carrying out rooting culture on the robust bud seedlings obtained by primary culture to obtain rooted seedlings; and hardening the rooted seedlings, and putting the seedlings into the ground. The ratio of a primary culture medium to a rooting culture medium is improved, the primary germination rate and the rooting rate are greatly increased, conventional subculture is not carried out, complex procedures and uncontrollable pollution factors of subculture are avoided, and under the condition that production conditions and manual operation are basically consistent, the production efficiency is greatly improved. The conventional tissue culture needs 3 months for producing a batch of healthy nursery stocks (based on 1000 plants), and only 45 days are needed after the method is improved, so that the problems of long time consumption and low efficiency of the existing sunshine rose grape tissue culture and rapid propagation technology are solved.
Owner:桂林市农业科学研究中心

Instantaneous conversion method for duckweed

The invention provides an instantaneous conversion method for duckweed. The instantaneous conversion method for duckweed comprises the following steps: collecting duckweed; carrying out subculture on the collected duckweed on a liquid culture medium; conducting activating and extracting agrobacterium tumefaciens with a fluorescence-labeled target gene; preparing a bacterium dissolving solution containing Silweet-775 and cane sugar; adding agrobacterium with the fluorescence-labeled target gene into the bacterium dissolving solution to completely dissolve thalli in the bacterium dissolving solution, and cracking the agrobacterium to release plasmids; selecting a complete duckweed, pricking a small hole in the back surface of a duckweed leaf by using a needle head, putting the duckweed into the bacterium dissolving solution for soaking and infecting, putting the infected duckweed into a duckweed liquid culture medium, and carrying out dark culture to obtain instantly infected duckweed. The method for instantly infecting the duckweed with the agrobacterium mainly adopts a needle punching method, has the characteristics of easiness in operation, short time, low cost and the like, and can be applied to related theories and application researches such as molecular biology of duckweed, bioreactor construction, fluorescence labeling and the like.
Owner:TIANJIN NORMAL UNIVERSITY

Takifugu bimaculatus testis tissue cell line and application thereof

PendingCN114717176AExcellent cell propertiesStrong divisionCell dissociation methodsClimate change adaptationTakifugu bimaculatusSubculture (biology)
The invention provides a takifugu bimaculatus testis tissue cell line and application thereof, and belongs to the technical field of biology. According to the method, the testis of the takifugu bimaculata is subjected to isolated culture, primary cells of the testis are obtained, continuous subculture is carried out, and finally the stable testis cell TBTc of the takifugu bimaculata is established. The testis cell TBTc of the takifugu bimaculatus is preserved in China Center for Type Culture Collection on October 11, 2021, and the preservation number is CCTCC NO: C2021230. The cell line is excellent in cell character, mainly comprises long fibrous cells, and is vigorous in division, short in passage time, easy to digest, good in adherence rate and resistant to hunger. The takifugu bimaculatus testis cell line provides a new in-vitro model for research on a gonad development mechanism of takifugu bimaculatus.
Owner:FUJIAN AGRI & FORESTRY UNIV +1

Ganoderma applanatum transgenic method

PendingCN114085862AReduce pollutionThe conversion efficiency of tree tongue is goodFungiMicroorganism based processesBiotechnologyTransformation efficiency
The invention discloses a Ganoderma applanatum transgenic method, and belongs to the field of biology. The method comprises the following steps: preparing a culture medium comprising a YPG culture medium and an MYG regeneration culture medium, constructing a recombinant eukaryotic expression plasmid vector pCAMBIA1303-pGPD-FIP-gap, suspending purified 1 * 10<7> Ganoderma applanatum protoplast in 250 [mu]L of osmotic pressure stabilizer, adding 5 [mu]g of plasmid pCAMBIA1303-pGPD-FIP-gap, lightly shaking up, then placing on ice, and carrying out ice bath treatment for 10 min; adding 50 [mu]L of a PEG buffer solution, placing on ice, carrying out ice bath treatment for 30 min, adding 1 mL of the PEG buffer solution, uniformly mixing, and standing at 28 DEG C for 20 min, wherein the PEG buffer solution comprises PEG6000, 15mM CaCl2 and 10mM Tris aqueous solution; and carrying out regeneration culture, hygromycin resistance screening and subculture, and then detecting. The result shows that transformants subjected to hygromycin resistance screening twice are positive, the PCR positive detection result shows that the positive transformants can be obtained by 10-60% of the PEG buffer solution, the efficiency is the best when the 30% of the PEG buffer solution is used for carrying out ganoderma applanatum conversion, 1 [mu[g of plasmid can obtain about 110-120 positive transformants, and the positive transformation rate can reach 95%.
Owner:SHENYANG AGRI UNIV
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