41results about How to "Growth conditions are easy to control" patented technology

A method for preparing a transparent semiconductor thin film of indium oxide with high electron mobility, using a double-chamber high-vacuum radio frequency magnetron sputtering method, using high-purity indium oxide with a purity of 99.99% as the target material, glass, etc. as the substrate, and using a purity of 99.99% More than one or two of high-purity argon and oxygen are sputtering gases, and sputtering growth is carried out in a magnetron sputtering device to obtain n-type transparent In2O3 semiconductor films with different electron concentrations and high electron mobility Material. The method has the advantages of simple and easy controllable deposition parameters, reliable preparation process, good repeatability and low manufacturing cost.

The invention discloses a method for preparing a semipolar AlN template, which includes: inducing AlN or a twin crystal structure during the growth process of AlN, changing the growth orientation of AlN to obtain a semipolar AlN template. Through the method of the present invention, c-plane sapphire or SiC can be directly selected as the substrate instead of r-plane sapphire, so that the stacking faults in the AlN epitaxial layer can be reduced, and the cost is low; or twin structure, can change the growth orientation of AlN from [0001] to this, which makes the growth window wider and the growth conditions easier to control; at the same time, it only needs one-step growth without changing the growth conditions, so that the subsequent AlN can keep along the The growth in the semipolar direction avoids secondary pollution and is beneficial to obtain high-quality semipolar AlN templates.

The invention discloses a strain of Chaetomium globosa which has a strong inhibitory effect on the pathogenic bacteria of apple anthracnose. Its registration number in the General Microbiology Center of China Microbiological Culture Collection Management Committee is CGMCC No. 10609, and the preservation date is March 2015. 11th. Chaetomium globosa HY1 provided by the present invention is an endophytic fungus of the endangered plant Coryne spp., its fermentation liquid and mycelia extract both have a strong antibacterial effect on the apple anthracnose pathogen, and also have a certain inhibitory effect on other plant pathogens. The strain has broad application prospects in the control of apple anthracnose.

The invention provides application of photosynthetic bacteria fermentation broth in pesticide and metal combined contamination soil. In the application, the photosynthetic bacteria fermentation broth with the number effective viable bacteria to be between 108 and 1,010 per millimeter is diluted to 10 to 150 times with water; the fermentation broth is uniformly sprayed to degrading bacteria treated soil in dosage of between 10 and 50kg per mu; the earth surface is turned over for about 20 cm after the spraying is completed to ensure that the broth and the soil are sufficiently mixed and the photosynthetic bacteria can degrade residues of carbamic acid ester pesticide in the soil in high efficiency; and simultaneously, the bioavailability of the metal can be reduced to repair the carbamic acid ester pesticide and metal combined contamination soil. The photosynthetic bacteria has wide raw material sources, low price and easily controlled growing condition, can use low molecular organic substances as photosynthetic electron receptor to perform photo heterotrophic growth under anaerobic illuminating condition, can use organic substances as breathing substrate to perform aerobic or heterotrophic growth under dark and aerobic conditions, can carry out the photosynthesis without releasing oxygen, and is suitable for large-scale industrial implementation.

The invention belongs to the field of biotechnology, and relates to a method for direct somatic embryo induction of areca nut and a method for obtaining regenerated plants by suspension culture. Somatic embryos are obtained by dark culture at 25-28° C., and then through suspension proliferation and differentiation culture to obtain somatic embryos; the somatic embryos are inoculated into somatic embryo germination medium and cultured to obtain regenerated plants. The method of the invention is simple in process and convenient in operation. The young inflorescence of areca nut is used as the explant material to directly induce and obtain early embryos, and the suspension culture technology is used to carry out large-scale proliferation, and then the somatic embryos are cultured into plants. The cycle is short, and the proliferation efficiency is high. The suspension germ line has the same genetic background, basically the same physiological state, and has good totipotency.

The invention discloses a semipolar AlN template, which has a semipolar exposed surface and contains a twin structure. The semi-polar AlN template of the present invention can be directly formed by selecting c-plane sapphire or SiC as a substrate without requiring r-plane sapphire, which can not only reduce stacking faults in the AlN epitaxial layer, but also has low cost, and its preparation process is simple, The growth conditions are easy to control, and there is no risk of secondary pollution during the growth process, so it has high quality.

The invention relates to a method for preparing a double perovskite magnetoresistive thin film. The preparation method comprises the steps of firstly grinding a double perovskite parent material to particles of which the sizes are less than or equal to 0.2mu m, mixing with acetone and iodine, and dispersing uniformly to obtain a suspension; then respectively connecting a monocrystalline silicon substrate and copper plates to a positive electrode and a negative electrode, carrying out electrophoresis on the suspension under the action of direct current voltage, and depositing a layer of uniform black thin film on the surface of the monocrystalline silicon; finally annealing the black thin film at 1030-1160 DEG C for 3-6 hours to obtain the double perovskite magnetoresistive thin film. According to the invention, the double perovskite magnetoresistive thin film is prepared on the substrate of the monocrystalline silicon by electrophoresis, the growth process of the thin film does not require a vacuum environment, and growth conditions are easy to control. The preparation method has the advantages of simplicity, no need of complex and expensive equipment and low cost. The prepared double perovskite magnetoresistive thin film has high Curie temperature and wide range of applications.

The invention relates to a strain of bacillus subtilis and a method for producing chymosin by using the same, belonging to the technical field of microbial fermentation. The invention discloses a bacterial strain producing chymosin, which is named as bacillus subtilis T and is preserved in the China Center for Type Culture Collection, and the preservation number is CCTCCNO: M2010259. A method forapplying the bacterial strain to produce the chymosin through liquid fermentation comprises the following steps of: (1) slant culture; (2) seed culture; and (3) liquid fermentation culture: inoculating cultured seeds into a fermentation culture medium according to the inoculation quantity of 0.1-0.2%, culturing for 96-136 h at 32-36 DEG C, and controlling the rotating speed of a shaker at 150 rpm. Bacillus subtilis is common nonpathogenic bacterium and is applicable to chymosin production; the method for producing the chymosin by using the bacillus subtilis CCTCCNO: M2010259 through liquid fermentation has the advantages of high chymosin production level, short production period, low production cost, easily controlled growth conditions, convenient chymosin extraction and the like and completely has the potential of industrial production.