247results about How to "High differentiation rate" patented technology

Disclosed is an agent comprising a benzothiophene alkyl ether derivative represented by the general formula below or a salt thereof:

wherein R¹ and R² independently represent at least one group selected from a hydrogen atom, a halogen atom, an alkyl group, an aryl group, an aralkyl group, an alkoxy group, an aryloxy group, an alkylthio group, an arylthio group, an alkenyl group, an alkenyloxy group, an amino group, an alkylsulfonyl group, an arylsulfonyl group, a carbamoyl group, a heterocyclic group, an amino group, a hydroxyl group, a carboxyl group, a nitro group, an oxo group and the like; R³ represents an alkylamino group which may be substituted or an amino or hydroxyl group which may be protected; and m and n independently represent an integer ranging from 1 to 6. The agent is useful as a neurogenesis inducer or a therapeutic agent for neuropathy.

The invention relates to a culture method for inducing adipose tissue-derived stromal cells to differentiate to chondrocyte, and aims to solve the problem that the prior art is low in differentiation rate. The culture method comprises the following steps: 1) performing separation of primary cells of adipose tissue-derived stromal cells; 2) performing amplification and passage of the adipose tissue-derived stromal cells; and 3) performing differentiation culture on P5-generation adipose-derived stem cells to chondrocyte, namely, adding the adipose tissue-derived stromal cells into a condition culture medium, namely, an adipose tissue-derived stromal cell chondrocyte differentiation culture medium, after P5 generation of passage, performing chondrocyte differentiation culture, replacing the medium of the cells every 3 days, observing the morphological change of the cells, and after 16 days of induction, performing Alcian blue dyeing, and identifying the chondrocyte differentiation situation of the adipose tissue-derived stromal cells. The result of Alcian blue dyeing identification shows that the chondrocyte can be formed, and the Alcian blue dyeing is positive. The culture method has the characteristics of being simple and feasible, short in induction time as the induction culture medium is a serum-free culture system, good in test repeatability and high in osteoblast differentiation rate.

The invention discloses an agrobacterium-mediated jatropha curcas gene transformation method. A material after 1/3 to 1/4 of base is cut from the cotyledon of a mature seed of jatropha curcas is used as an agrobacterium infection receptor. The method comprises the following steps of: after co-culturing, inoculating the transformed receptor and the agrobacterium to a culture medium without a screening agent to perform callus induced culture for 4 weeks; and succeeding the receptor and the agrobacterium to a selective culture medium and screening resistant buds by using kanamycin sulfate as a screening agent, sub-culturing the resistant buds obtained by screening to obtain resistant plants, and obtaining transgenic jatropha curcas plants by molecular detection. Compared with the conventional jatropha curcas transformation method, the method can obtain high regenerative bud induction rate, simplifies the transformation program, shortens the transformation period, greatly improves the transformation efficiency and has good application prospect.

The invention discloses a special anti-cracking foliar fertilizer for a jujube tree, and a preparation method and an application thereof. The special anti-cracking foliar fertilizer for the jujube tree is composed of the following components in percentages by mass: 5% to 8% of potassium chloride, 7% to 15% of calcium chloride, 1% to 5% of borax, 1% to 5% of chelated magnesium, 1% to 3% of chelatediron, 0.5% to 1.5% of zinc sulfate, 0.2% to 0.6% of manganese sulfate and 3% to 4% of organosilicon, with the balance being water. The foliar fertilizer provided by the invention has low production cost, is safe and effective, and is beneficial for and harmless to human and livestock; mineral elements added in the foliar fertilizer are needed by animals, and can effectively prevent a variety of diseases like yellow-leaf disease and little-leaf disease caused by nutrient deficiency of a fruit tree; the disease resistance of a tree body is strengthened; the quality of a fruit is improved; the soluble sugar content of a fruit is improved by 14.3% to 43.5%, the weight of a single fruit is increased by 5% to 13.3%; the proportion of high-quality fruits is increased by 20.2% to 69.8%; the proportion of low-quality fruits is decreased by 28.9% to 76.9%; the fruit cracking rate of golden-silk jujube is significantly decreased by 30% to 45%; meanwhile, the contents of mineral elements in fruits and leaves are significantly improved; and the foliar fertilizer is free of any side effects, is safe and reliable, and is a green and environment-friendly product.

The invention provides a sexual propagation method of bletilla striata. The sexual propagation method of bletilla striata particularly comprises the steps of processing of capsules, preparation of nutrients, inoculation and cultivation, and bottle out domestication, and is characterized in that in the step of processing of capsules, an alcohol lamp drying mode replaces a filter paper sucking dry mode in the prior art; in the step of preparation of nutrients, combination of banana slurry and humus is adopted; in the step of inoculation and cultivation, only inoculation, germination cultivation and strong seedling cultivation steps are included, the conventional enlargement cultivation process in an existing tissue culturing technology is omitted, and the process is simplified and the cost is lowered while the purposes are achieved; in the step of bottle out domestication, cultivation is performed through humus in a greenhouse, domestication is finished under the condition of controlling the relative humidity, temperature and shading rate, and qualified bletilla striata seedlings are obtained. Bletilla striata seeds are used for scale seedling culturing, the survival rate is high, manual scale propagation of bletilla striata is achieved, and the obtained bletilla striata seedlings are low in contamination rate, high in differentiation rate and stable in inheritable character.

The invention relates to a mature wheat embryo culture and regeneration method. Regeneration culture mediums are based on MS basic culture mediums. In the regeneration culture mediums, the content of maltose is 40g/L, the content of MES is 1.95g/L, the content of KT is 5mg/L, the content of NAA is 0.1mg/L and the pH is 5.8. The specific method comprises the steps of selecting mature and full wheat seeds, soaking the seeds in 70% alcohol solution for 5min, sterilizing the seeds in 0.1% HgCl2 solution for 20min, washing the seeds for at least four times by using sterile water and soaking the seeds in the sterile water for 19-24h; removing the buds and the roots of the mature embryos of the seeds, longitudinally cutting the mature embryos, putting the cut mature embryos into induction culture mediums to culture in the dark at 23-25 DEG C, conducting subculture once for 10-14 days and conducting induction culture for totally 20-28 days to obtain mature wheat embryo calluses; and then transferring the mature wheat embryo calluses into the prepared regeneration culture mediums to culture in the light at 23-25 DEG C for 25-30 days and inducing the mature wheat embryo calluses to be differentiated to form regenerated seedlings.

The invention belongs to the field of biomedicine, and specifically relates to a method used for inducing differentiation of human multipotential stem cells into retinal progenitor cells. According to the method, human embryonic stem cells or human induced multipotential stem cells are induced in a medium containing N2, and then are delivered into a retina induction medium containing neural basis culture medium, knockout serum replacement and nicotinamide so as to obtain the retinal progenitor cells. The method is capable of increasing differentiation rate of human multipotential stem cells into retinal progenitor cells; and the retinal progenitor cells obtained via differentiation can be used for transplantation therapy of irreversible degenerative diseases of retinal neurons, such as age-related macular degeneration and retinitis pigmentosa, and also can be used for iPS cells sourced from patients as cell models in drug screening and gene interference experiments. Compared with existing technology, small molecule compounds used in the method are less, so that influences caused by non-anthropogenic factors are avoided effectively, and yield of obtained optic cup-like cells is obviously higher than that of existing induced differentiation methods.

The invention discloses a xanthoceras sorbifolia culture method, which relates to the xanthoceras sorbifolia rapid propagation technology and belongs to the technical field of plant tissue culture. The xanthoceras sorbifolia culture method solves the problem of phenomenon of one fruit of thousands of flowers of the xanthoceras sorbifolia. Therefore, the xanthoceras sorbifolia has high seedling differentiation rate, high propagation speed and high seedling yield. The xanthoceras sorbifolia realizes the micropropagation at the speed of several times each month, and the resource regeneration and the utilization of the micropropagation are reached through tender stem or stem tip culture. The xanthoceras sorbifolia culture method has the beneficial effects that the seedling development is healthy and strong, the planting survival rate is high, the seedling raising is early, the growth period is long, the seedling lignification degree is improved, the seedling cold resistance and overwintering capability is enhanced, the seedling raising time is short, the cost is low, and the seedling yield in the unit area is high.

The invention discloses a Kyoho grape labor-saving cultivation method achieving production and sightseeing and picking. The method comprises various measures such as garden plot selection, canopy frame building, medium cultivation, ridging, field planting, water management, psi-shaped pruning, denuclearization treatment, soil management, anti-bird mesh covering, leaf picking, bagging and disease and pest control. According to the Kyoho grape labor-saving cultivation method achieving production and sightseeing and picking, a psi-shaped pruning mode is adopted to shape grapes, the method conforms to growth habits of the Kyoho grapes, a tree body reaches a balance of reproductive growth and vegetative growth, the flower bud differentiation rate, the fruit setting rate, the fruit sugar degree and the fruit yield are obviously increased, and the quality is obvious improved; mechanical picking can be conducted, the method is suitable for sightseeing and picking, and the method can be popularized in a large area in industrial production of the grapes.

The present invention relates to a culture media for peony high frequency embryogenic callus differentiation, and a culture method thereof. The culture method comprises steps of material selecting, seed embryo sterilizing and separating, culture media preparing, callus differentiation and embryo bud differentiation. The culture media for the peony callus differentiation is prepared by adding 0.5-2.0 mg/L of NAA, 0.1-0.5 mg/L of TDZ, 30 g/L of sucrose and 6 g/L of agar to a modified 1/2MS basic culture media, wherein the pH value is 5.8. The culture media for the peony embryo bud differentiation is prepared by adding 1.0-5.0 mg/L of TDZ, 100 g/L of sucrose and 6 g/L of agar to the modified 1/2MS basic culture media, wherein the pH value is 5.8. The culture media and the culture method of the present invention have the following advantages that: the raw materials are easily obtained; the callus rate is high; the browning rate is low; the embryo bud differentiation rate is high; the generesearch and the gene application requirements can be met.

The invention discloses a quick cultivation method for rhizoma bletillae tissue culture seedlings. The method comprises the following steps: selecting intact non-cracked rhizoma bletillae capsules and disinfecting the capsules by 75% alcohol for 30 seconds; then soaking and disinfecting the capsules by using 0.2% mercury bichloride for 10 minutes; washing 6 times by sterile water; fully and thoroughly washing, airing and uniformly spreading on a culture medium to cultivate; and when the seeds germinate to obtain seedlings which are about 2cm long, inoculating 3-4 seedlings as a cluster to a strong sprout culture medium to be cultured. Compared with the conventional tissue culture seedlings obtained by sterile germination of rhizoma bletillae seeds, the method just needs subculture once, so that the time consumed is short and at least three months are saved.

The invention discloses a tissue culture method for populus yunnanensis Dode with a tender stem as an explant, belonging to the tissue culture method for plants. The tissue culture method comprises the following steps of: acquiring populus yunnanensis Dode branches growing for three years; carrying out water planting and then taking the tender stem as the explant; flatly placing an aseptic tender stem in a differential medium; growing fasciculate adventitious buds on callus; and respectively connecting into a multiplying and rooting culture medium, transplanting a domestication matrix, and the like. According to the tissue culture method disclosed by the invention, materials can be conveniently and rapidly obtained, culture media and domestication matrixes at various phases are respectively screened and compared; and the invention provides a method for industrial rapid reproduction and seedling culture of the populus yunnanensis Dode as well as the research for physiologic genetic characteristic of the populus yunnanensis.

The invention discloses a monkshood-tuber tissue culture and rapid propagation method, which comprises the main steps of selection, disinfection and sterilization of an explant, inoculation and induction of callus, induction of cluster buds, root induction, hardening-seedling and transplanting and the like. By carrying out tissue culturing on stem tips, blades, roots, stem sections, leafstalks, seeds and the like of monkshood-tuber as the explants, and inducing a plant to regenerate and rapidly propagate monkshood-tuber seedlings, the inductivity, the differentiation rate and the rooting rate are higher, and the survival rate of the seedlings after being transplanted in culture soil is high. The method can effectively overcome the problems of poor disease resistance, low and unstable output, varietal complexity and the like of a traditional monkshood variety in the production of the monkshood-tuber, realizes the variety purification and rejuvenation through stem tip detoxification, tissue culture and other means, and provides excellent monkshood varieties, and lays a favorable foundation for the factory and scale production of large quantities of high-quality seedlings required by monkshood GAP (Good Agricultural Practices) bases and the like.

The invention discloses a tissue culture rapid propagation method of callicarpa nudiflora. The method performs control on the explant collection, disinfection method, differentiation, multiplication, screening of a rooting medium, selection of a transplanting matrix, environmental conditions in the culture process and the like. By adopting the methods of explant selection, inoculated culture, propagation expanding culture, rooting culture and hardening-seedling transplanting, a set of complete callicarpa nudiflora tissue culture rapid propagation technology system is established, so that the differentiation rate reaches 100%, the monthly multiplication coefficient reaches 4.95, the rooting rate reaches 93.7%, and the transplanting survival rate exceeds 90%. The method disclosed by the invention is simple and easy to implement, simple in process and high in efficiency, effectively suppresses the pollution and browning of the callicarpa nudiflora explant, improves the differentiation rate of the tissue culture seedling, realizes fast multiplication, high rooting rate, high survival rate and low cost, and provides a reliable technical means for large-scale production of callicarpa nudiflora seedlings.

The invention discloses a method for rapid tissue propagation of acer saccharum, and belongs to the technical field of woody plant tissue culture and propagation. The method comprises the following steps: selecting explants, pretreating the explants, establishing a sterile system, performing inductive culture, performing multiplication culture, performing rooting culture, strengthening and domesticating seedlings, and the like. Tissue organs of plants are cultured under a sterile system condition by controlling external environment conditions artificially, the purpose of rapidly propagating nursery stock is achieved, and stable properties of excellent female parents are effectively maintained. Compared with common vegetative propagation of cuttage and grafting, the method is small in material amount, free of limit of natural conditions and relatively applicable to neophytes, the propagation coefficient is as high as 5-20 times, and propagation and popularization problems caused by shortage of resources of the acer saccharum are solved.

The invention discloses a method for fast propagation of test tube arrowhead by tissue culture. The test tube arrowhead is formed by sterilizing treatment of an explant, stem tip differentiation, subculture multiplication and induction. According to the method disclosed by the invention, the propagation of the test tube arrowhead is carried by tissue culture, and thus high propagation coefficient and short propagation period are realized; in addition, the whole propagation process is carried out under manual control conditions without being influenced by an external environment; the test tube arrowhead can be annually produced; due to small size and light weight, the test tube arrowhead can solve the problems existing in the remote transportation and storage of arrowhead test tube seedlings; the test tube arrowhead has no disease, so that the problem that a conventional arrowhead seed easily carries diseases is solved; the induction of the test tube arrowhead provides an operable simple system for research work of the carmus expansion mechanism; as an in-vitro dormancy organ, the in-vitro indoor preservation research on arrowhead germ plasm resources can be realized; and live exchange of international germ plasm resources is benefited. The invention provides a quick, convenient and effective propagation method for the development of the arrowhead industry.