2results about How to "Efficient and stable preparation" patented technology

The invention relates to the technical field of bacterial cellulose preparation, in particular to a composite flora for producing bacterial cellulose and a preparation method thereof, and the preparation method comprises the following steps: screening gluconobacter oxydans, obtaining culture medium preparation materials and preparation tools, preparing a slant culture medium set, preparing an enriched liquid culture medium set, and preparing composite flora mixed inoculation liquid. The method comprises the following steps: preparing a waste tobacco leaf leaching solution, extracting a proportional leaching solution from the waste tobacco leaf leaching solution according to a preset proportion, obtaining a mixed fermentation culture medium based on a preparation tool and the proportional leaching solution, and carrying out inoculation operation on a composite flora mixed inoculation solution by using the mixed fermentation culture medium to obtain a dry cellulose membrane; calculating the yield of the bacterial cellulose based on the dry cellulose membrane, and completing the preparation of the composite flora for producing the bacterial cellulose based on the yield of the bacterial cellulose. The method can be used for scientifically, efficiently and stably preparing the composite flora.

The application discloses a method for preparing a two-dimensional ultracold atomic gas by optimizing adiabatic compression, and belongs to the technical field of ultracold atomic physics and optical lattice. The method takes the quantum adiabatic evolution of a three-dimensional ultracold atomic gas in an adjustable period optical lattice as a physical model basis, and equivalently describes the motion of atoms in the lattice bound direction as a one-dimensional quantum harmonic oscillator system varying with an external parameter. In the lattice compression process, the instantaneous energy level structure of the system evolves with time, and the minimum energy gap region between the lowest energy level and the first excited state is the main source of non-adiabatic transition. A non-adiabatic parameter is introduced to simultaneously describe the relationship between the instantaneous energy gap and the scanning rate of the parameter, which is used for quantitative evaluation of the adiabaticity of the system, and the Landau-Zener non-adiabatic transition model is combined to design and optimize the scanning curve of the lattice compression. The scheme can effectively reduce the probability of non-adiabatic excitation in the compression process, and significantly shorten the lattice compression time under the premise of ensuring the adiabatic evolution of the system.