3results about How to "Avoid high temperature heating" patented technology

The invention relates to the technical field of polypeptide extraction, and discloses a method for extracting crocodile nail peptide with an anti-radiation effect, which comprises the following steps: degreasing and crushing crocodile nails to obtain fine powder, and performing solid-phase kneading on the fine powder and an enzymatic extraction auxiliary composition under an anhydrous condition; adding water, homogenizing, and treating by a high-voltage pulse electric field to obtain a flexible precursor; sequentially adding keratinase and alkaline protease to carry out constant pH relay hydrolysis in a nitrogen-filled micro-positive pressure environment; cooling, adjusting the pH to an isoelectric point, performing coagulation, separating supernate, performing gradient elution through macroporous adsorption resin, and performing vacuum concentration to remove alcohol; finally, the concentrated solution is screened through 3000 Da and 500 Da ultrafiltration membrane bags in sequence, trapped fluid is collected, freeze drying is conducted, and the product is obtained. According to the preparation method disclosed by the invention, the dissolution rate and the purity of the crocodile methyl peptide with the anti-radiation effect are effectively improved by combining solid-phase kneading, a high-voltage electric field with double-enzyme hydrolysis and physical screening, and inactivation and loss of active ingredients are avoided.

This invention relates to the use of a transition metal ion-doped graphene oxide membrane catalytic material in the synthesis of 4-phenylmorpholine antibacterial derivatives, belonging to the field of membrane materials and catalytic application technology. The transition metal ion-doped graphene oxide membrane catalytic material retains the intrinsic acidic catalytic sites of graphene oxide nanosheets while introducing transition metal ions that can induce the orientation of reactant molecules. Utilizing the two-dimensional nano-confined channels provided by the interlayer of the graphene oxide membrane and the synergistic effect between the transition metal ions and reactant molecules, rapid and long-lasting catalytic synthesis of 4-phenylmorpholine antibacterial derivatives can be achieved at room temperature (22.3 ± 0.1 ℃) under pressure-driven continuous flow reaction conditions.

This invention discloses a method for preparing and applying phosphorus-doped sulfur nanoparticles. In these nanoparticles, phosphorus is uniformly distributed on the sulfur nanoparticles, forming S-P chemical bonds between them. Utilizing the properties that elemental phosphorus and sulfur are soluble and miscible in ethylenediamine solution, a solution of sulfur and phosphorus in a specific ratio is prepared and added to an organic solution containing a surfactant. A formic acid solution of a certain concentration is then added dropwise to precipitate the product. After washing and freeze-drying, the phosphorus-doped sulfur nanoparticles are obtained. This preparation method avoids high-temperature heating, directly forming P-S bonds through a wet chemical method to achieve phosphorus doping of sulfur. It boasts a high yield and can be mass-produced. The nano-sized phosphorus-doped sulfur particles, due to their excellent properties such as high specific surface area and nanoscale effect, can be applied in energy storage fields such as lithium-sulfur batteries, exhibiting excellent electrochemical performance.