108 results about "Cell membrane structures" patented technology

The invention provides a nanoparticle with a simulated outer cell membrane structure, which is formed by electrostatic interaction of polycation and polyanion; the particle diameter of the nanoparticle is 100nm-400nm; the polycation is selected from chitosan, polyethyleneimine, polylysine and dendritic polyurethane; and the polyanion is selected from anionic polymers containing phosphorylcholine groups; the weight ratio of the polycation to the polyanion is (1:5)-(5:1). The nanoparticle has a simple preparation process with a mild condition; the nanoparticle with the simulated outer cell membrane structure is capable of effectively inhibiting protein adsorption and platelet adhesion, and is unlikely to be swallowed by mononuclear macrophages so as to prolong in-vivo circulation time, increase medicine utilization rate and reduce toxic and side effects.

The invention discloses selenium-enriched buckwheat noodles and a preparation method thereof. The selenium-enriched buckwheat noodles are made from the following raw materials in parts by weight: 30-50 parts of buckwheat flour, 10-15 parts of selenium-enriched wheat flour, 0.03-0.05 part of a mildew preventive, 5-8 parts of black beans, and 5-8 parts of black sesame. A mildew preventive is prepared in a preparation process; the raw material of the mildew preventive is chitosan; the chitosan is good in biodegradability, free from toxicity and low in irritation; the chitosan can be adsorbed on the cell surface, so that a layer of polymeric membrane is formed; transport of nutrient substances into cells is prevented; therefore, the bacteriostatic and bactericidal role is played, so that flouris prevented from mildewing; mildew preventive molecules can inhibit the activity of a respiratory enzyme system and an electron transfer enzyme system of biological cells, and destroy cell membranestructures in living organisms; therefore, development of mould, saccharomycetes and bacteria is prevented; thus, the mildew-proof effect is good; furthermore, the biological activity itself is good;and the application range is wide.

The invention discloses a protective agent used in a freeze-dried preservation method of genetic engineering mushroom strains and a preserving method of genetic engineering mushroom strains. An ediblemushroom strain fermenting substance used in the technical scheme of the invention is used as the protective agent for freeze-dried preservation of the strains. Cultivation substances are fermented through edible mushroom strains such as cohabitant fungi, so that lignin and cellulose which are not liable to decompose at the normal state can be decomposed, organic compounds are fermented to decompose, and fermentation products and degradation substances contain various active micromolecules, such as micromolecular peptide, oligosaccharide and other low molecular weight substances of which thespecific chemical composition is still not found, which can maintain the integrity of cell membrane structure and protect the cell protein structure from being destructed. The implementation of the scheme proves that when an experimental group with the protective agent disclosed by the scheme of the invention is compared with a control group to which the protective agent disclosed by the scheme ofthe invention is not added, the technical effects of the experimental group scheme are obviously better, which proves that the strain fermentation substances have the advantages in the respect of maintaining the survival rate and the production properties of the strains.