3results about How to "Good crystal shape" patented technology

This invention relates to a method for improving protein crystallization efficiency using hydrogel regulation. The method includes the following steps: mixing monomers to obtain a prepolymer solution, adding water and a photoinitiator, stirring to obtain a hydrogel precursor solution; stabilizing the obtained hydrogel precursor solution, then irradiating it with ultraviolet light to obtain a rough hydrogel; immersing the rough hydrogel in water and then drying it to obtain a dried hydrogel; preparing a buffer solution and using the prepared buffer solution to prepare a precipitant; immersing the dried hydrogel obtained in the previous step in the prepared precipitant to swell the dried hydrogel, washing and drying it to obtain a target hydrogel; dissolving the protein in the prepared buffer solution to obtain a protein solution; and dropping the obtained protein solution onto the surface of the obtained target hydrogel to crystallize it to obtain protein crystals. Compared with existing technologies, this invention can effectively solve the problem of low efficiency in protein crystallization while ensuring the quality of protein crystals.

The application discloses a titanium gypsum solidification material and an environmental risk assessment method thereof. The titanium gypsum solidification material is obtained by mixing titanium gypsum produced in a titanium dioxide production process and red mud produced in an aluminum production process according to a weight ratio of 1:4-8 to form a titanium gypsum-red mud composite base material, and then performing reinforcing treatment on the titanium gypsum-red mud composite base material to obtain titanium gypsum-red mud composite granular material, and then mixing the titanium gypsum-red mud composite granular material with cement according to a weight ratio of 3:1-5. The titanium gypsum solidification material can realize waste resource utilization of the titanium gypsum and the red mud, realizes waste treatment by waste, and solves the problem of poor concrete compatibility of the titanium gypsum as cement ingredients, and provides a new high-strength material for roadbed material selection.

The invention discloses a preparation method of D-allose, and relates to the technical field of D-allose production, after a D-allose conversion solution is subjected to centrifugation, decoloration, desalination, concentration, chromatographic separation and re-concentration, ethanol is added in batches for segmented cooling crystallization, suction filtration and ethanol washing to obtain white crystals, and the white crystals are dried to obtain the D-allose. The production cost is reduced, the obtained product is good in crystal form, and the product quality is improved.