48 results about "Bio nanotechnology" patented technology

Provided is a compound semiconductor nanoparticle that exhibits circularly polarized luminescence characteristics. CdS prepared inside a core of ferritin, which is a cage-like protein, exhibits a high circularly polarized luminescence (CPL). A wavelength of the circularly polarized luminescence (CPL) can be controlled by laser irradiation, thereby enabling utilization of the compound semiconductor nanoparticle in the field of bionanotechnology, for example, in creating a WORM (Write-Once Read-Many times) memory. As the cage-like protein, which is a protein with a cavity formed therein, a protein belonging to the ferritin protein family, such as apoferritin, or a recombinant thereof can be used.

The present invention discloses hydrophobin mimics of formula (I) comprising a protein head group, hydrophilic linker and hydrophobic tail and to a process for synthesis of library of hydrophobin mimics thereof. The hydrophobin mimics of the present invention self-assemble to form protein nanoparticles / nanocontainer either alone or in a specified chemical environment. The hydrophobin mimics (I) of the present invention find application in area of bio-nanotechnology.

The invention provides a preparation method of hyperconcentration placental-peptide nanometer viable-cell freeze-dried powder, and a hyperconcentration placental-peptide nanometer viable-cell freeze-dried capsule which comprises the hyperconcentration placental-peptide nanometer viable-cell freeze-dried powder prepared by the preparation method. The preparation method adopts the CO2 supercriticalextraction, the ultra-low-temperature freeze-drying technology, and the biological nanotechnology. The hyperconcentration placental-peptide nanometer viable-cell freeze-dried capsule is obtained by utilizing the lipidosome preparation technology.

The invention relates to a photocrosslinking nano hydrogel which comprises the effective component of an ultraviolet photo-initiated azido crosslinking carboxymethyl chitosan derivative, and is prepared by the method comprising the following steps: taking the water solution of carboxymethyl chitosan; adding the organic solution of 4-azidobenzaldehyde under the condition that the mol ratio of the sugar moiety of the carboxymethyl chitosan to the 4-azidobenzaldehyde is 1:(0.01-10); stirring and mixing evenly at 0-30 DEG C under the dark condition, wherein when a photocrosslinking carboxymethyl chitosan amphiphilic polymer is generated by the reaction, the amphiphilic polymer can be self-assembled into a photocrosslinking nano-particle mixed solution; and then radiating the nano-particle mixed solution by ultraviolet light to initiate azido crosslinking. The invention has simple process and easy operation, can obtain photocrosslinking targeted nano gel by coupling carboxyl with a target molecule or a target molecule derivative, and has potential application value in the fields of tissue engineering, biomedical implants, biological nano technology, drug delivery systems, and the like.