48results about How to "Mature" patented technology

The invention discloses a young pig islet cell culture medium and an application method thereof. The culture medium is added into a basic culture medium (M199): 1-50 mM of glutathione, 1-50 mM of glutamine, ITS 0.01-1 % of ITS, 1-50 mM of nicotinamide, 0.1-20 micro-M of water-soluble vitamin E, 1-100 U / L of heparin, 0.01-0.5 mM of 4-(2-aminoethyl) benzenesulfonyl fluoride hydrochloride and 0.01-0.1 mM of exenatide. Compared with the common media (1640, F10 and EGM2), the viability and maturation rate of islet cells in young pigs can be significantly improved.

The invention discloses a refraction-reflection type imaging spectrometer optical system based on a prism-grating-prism decomposition, which is characterized by comprising a field stop, a collimate mirror, a plane mirror, a decomposition assembly, a convergent mirror group and a optical filter which are arranged sequentially from an object to an image. The optical system is in refraction-reflection type, the collimate mirror is a concave spherical reflector, the convergent mirror group is a spherical lens group, the decomposition assembly is of a prism-grating-prism form, a prism and a grating are combined for correcting spectrum curvature of the decomposition assembly, the grating is a reflection type plane grating, and an angle is formed between the convergent mirror group and the decomposition assembly in the optical axis direction and used for adjusting residual spectrum curvature of the optical system. The refraction-reflection type imaging spectrometer optical system based on the prism-grating-prism decomposition has the advantages of low spectrum curvature, high optical efficiency, compact structure, simply processing and installing and adjusting procedures and flexibility in selecting spectrum segments.

The invention belongs to the technical field of plant tissue culture, in particular to a production method for a pinellia tuber artificial seed stem. The method comprises the following steps: the selection and disinfection of a pinellia tuber explant, the induction and propagation of an embryoid, and the induction of the formation, growth and maturation of the artificial seed stem. The corresponding procedure from the wild pinellia tuber plant to the artificial seed stem production, and the key technology of exclusive culture mediums needed in different phases can be used to culture and produce the mature pinellia tuber artificial seed stem at the large scale; and the sprouting rate can reach 90 percent. The method overcomes the defects of low pinellia tuber sexual propagation coefficient, long propagation cycle, easily degenerated quality, troublesome tissue culture seedling transplanting procedure, immature and hardly sprouting in-vitro tuber, and the like under the natural conditions, provides the practical technology for the rapid industrialized production of the pinellia tuber artificial seed stem, and can alleviate the short supply status quo of the seed market.

The invention discloses a device and method for producing ammonium sulfate. The device comprises a neutralization and crystallization reactor, a thickener, a decanter, a centrifugal machine and a fluidized bed dryer which are connected through a pipeline, wherein the thicker comprises a settling section, a thickening section and an elutriating section which are sequentially connected from top to bottom; the decanter is horizontal and is divided into a light-phase area and a heavy-phase area by a baffle plate; the centrifugal machine is a horizontal double-stage piston pushing type centrifugal machine; the fluidized bed dryer is a horizontal multi-stage fluidized bed dryer, and the interior of the dryer is divided into a feeder drying area and a product cooling area; the neutralization and crystallization reactor comprises a cylinder body in which an inner circulation passage formed by a flow guiding cylinder, a backflow baffle plate and a stirrer is arranged, and an outer circulation passage formed by a crystallizer circulating pump is arranged outside the cylinder body. According to the method for producing the ammonium sulfate, the ammonium sulfate is produced by a neutralization and crystallization one-step method, so that the energy can be saved and the power consumption can be reduced; in addition, the flow can be shortened, and the investment is reduced.

The invention provides a cultivation method for 'Jinying' novel grape species. Hard branches of dozens of Kyoho grapes are selected as scions; tens of summer black grape trees are selected as stock and pollinizers; in May, the hard branches of the Kyoho grapes and the summer black grape trees are grafted, after survival, only one Kyoho grafting branch can be reserved on each tree, and the other branches are sheared off; in the current year, after to-be-grafted Kyoho grapes bloom, the Kyoho grapes are mated with blooming summer black grapes, and isolation pollination is performed; in the current year, the grafted Kyoho grapes on the summer black grape trees are fruited, seeds are taken and embedded into sandy soil, in the next March, seedling growing is performed, and in the current July, green branch transplanting is performed. The average fruit weight of the species is about 12 grams, and the sugar content is about 16-18%. The mature period is about 20 days ahead of the schedule of the Kyoho grapes and about 10 days later than the summer black grapes, and the problems that the Kyoho grapes are seriously different in size and hard in fruit bearing in the flowering phase are effectively solved. The species has the only defect that the species has no immunity to gray mold and the gray mold needs to be prevented one more time compared with other species.

The invention discloses an improved culture medium for neonatal pig islet cells and a use method of the same. An apoptosis inhibitor Z-VAD-FMK, a human basic fibroblast growth factor hFGF-beta, a vascular endothelial growth factor VEGF, an insulin-like growth factor R3-IGF-1, a human epidermal growth factor hEGF, a hepatocyte growth factor hHGF, pig serum, sodium selenite, insulin, transferrin, ethanol amine, 1-methyl 3-isobutyl xanthine, nicotine, cortisol, penicillin and streptomycin are added in HAM'S F10 culture medium. According to the culture medium, apoptosis can be reduced and recovery rate can be increased; the cultured cells have a sensitive glucose stimulation response and more mature functions compared with generally-cultured islet cells; the insulin secretion amount of the islet cells with the same quantity is increased; the viability of islet beta-cells is improved; the breakages of islet cell clusters are reduced, and the envelops of the cell clusters are complete, so that the cell clusters are more suitable for being transplanted.

A driver assembly (10) for driving a high-power gas discharge lamp (L) comprises a plurality of at least two low-power lamp drivers (1 A, 1B, 1C) having their respective output terminals coupled in parallel, each individual driver (l A, 1B, 1C) being designed for generating a commutating DC-current at its respective output terminal, the assembly (10) comprising synchronisation means for synchronising the output currents of the individual drivers (1 A, 1 B, 1 C).

The invention discloses a millimeter-wave dual reflector antenna capable of focusing a near-field wave beam. The antenna comprises a main reflector, an auxiliary reflector and a feed source, wherein a wave beam emitted by the feed source is reflected by the auxiliary reflector to the main reflector, and then emitted; a curved surface of the main reflector is a revolution paraboloid; and a central point of the main reflector is located at an intersection point of an emitting central axis of the auxiliary reflector and an axis of a radiation wave beam. The antenna is simple in structure and mature to process; the power density of a near-field region axis of the antenna is improved; the maximum power density of the axis is improved greatly under the same input power; a distance range of an effective power threshold is expanded; the efficiency of the antenna is improved; and a near-field gain of the antenna is increased.

The invention provides a fertilizer special for honeysuckle flower and a preparation method thereof. The fertilizer special for honeysuckle flower comprises 18-28 parts by weight of an amino acid fertilizer, 17-27 parts by weight of an organic fertilizer and a needed amount of nitrogen-phosphorus-potassium fertilizer. After the fertilizer special for honeysuckle flower provided by the invention is applied, the content of chlorogenic acid and the content of galuteolin are increased by 12.9 percent and 69.64 percent respectively, and a remarkable quality improving effect is achieved.

The invention relates to the field of cell culture, in particular to a method for preparing high-purity induced pluripotent stem cell-derived human brain dopaminergic neurons. The invention provides a human dopaminergic neuron induction method and a related culture solution formula. The culture medium includes serum-free basal medium, cell additives, neurodevelopmental factors and inhibitors. Among them, the use of serum-free basal medium can avoid the introduction of exogenous substances and reduce the risk of contamination. At the same time, a variety of nutrients, such as cell additives and neurodevelopmental factors, can stimulate iPSC cells to activate iPSC cells and promote differentiation. The cell culture method provided by the invention is simple, efficient, low in cost, and can induce high-quality human dopaminergic neuron cells in a short period.

The present invention discloses a kind of screw cycloid profile for large flow double screw pump. The screw profile includes addendum circle connected via prolonged cycloid to one end of the dedendum circle, pitch circle with one end connected via prolonged cycloid to the other end of the dedendum circle, and the other end of the pitch circle connected via epicycloid to the other end of the addendum circle. The screw pump with the screws has less leakage, high output pressure, smooth running, great specific flow rate, high bearing capacity and easy manufacture.