40results about How to "Broad antimicrobial activity" patented technology

The invention relates to the technical field of functional polymer polymer composite film materials, and discloses a preparation method of a nanometer antimicrobial peptide-loaded polymer composite protective film; and also discloses a nanometer antimicrobial peptide-loaded HACC / PLA polymer composite protective film; Apps are also exposed. The protective film of the invention has the functions of high-efficiency protection, good biocompatibility, environmental protection and degradability, etc. The invention combines the loaded nano antibacterial peptide with the HACC / PLA polymer composite protective film, which can greatly improve the antibacterial resistance of the existing protective film. Poisonous effect and good biocompatibility, the protective film of the present invention has become a major breakthrough of new protective biological materials, has a wide range of applications, and has huge application value and broad market prospects in daily life and medical care.

A strain of Bacillus velezensis AM6 (Bacillus velezensis), bacterial agent and its preparation method and application. The Bacillus velezensis AM6 is preserved in the General Microorganism Center of China Committee for the Collection of Microorganisms, and the preservation number is CGMCC No.21320. The growth condition of the bacterial strain is not high, has wide environmental adaptability, and can be used as food with antibacterial activity, feed for animals and aquatic products with antibacterial activity, and antibacterial agent for plants and crops.

The invention relates to a preparation method and the application of bone marrow protein. The method comprises the following steps: adding fresh bone marrow in bones of cattle, sheep, horses, camels or animals in other animal slaughterhouses as raw materials; separately extracting protein in the fresh bone marrow subjected to water cleaning and pretreatment by using a trihydroxymethyl aminomethane hydrochloric acid buffer solution and a sodium chloride solution, wherein a lipid component is extracted by petroleum ether or normal hexane and no lipid component is left; then concentrating part of a water extract and carrying out dialysis desalting; using a modern spray drying technology or carrying out freeze drying and refining to obtain the bone marrow protein. The bone marrow protein is verified to have bacteria and fungus resisting activities, wide microorganism resisting activity and the functions of enhancing humoral immunity and general immunity, and is rich in pure nature-derived protein which is easily digested and absorbed by a human body; the aims of changing wastes into valuables and sufficiently utilizing resources are achieved while nutrition of the bone marrow protein is retained; the bone marrow protein is used as a natural antibacterial agent, a food additive or a medicine, and also can be used for food and medicine industries.

The invention relates to a preparation method and application of chickpea watercress polypeptide. In the method, chickpea watercress oil components are fully degreased, extracted with phosphate buffer solution, neutral protease, alkaline protease, trypsin or papain Enzymatic hydrolysis, using ultrafiltration membrane technology to prepare peptides with molecular weights of 6‑10kDa, 3.5‑6kDa, 1‑3.5kDa, and then refining them by spray drying or freeze drying. The peptide powder has been verified to have anti-bacterial and fungal activity, has a wide range of anti-microbial activities, and has the function of enhancing humoral immunity and systemic immunity. It is rich in pure natural plant-derived peptides and proteins that are easily digested and absorbed by the human body. The feature of the protein is that it not only retains the original biological activity of chickpea, but also realizes the purpose of turning waste into wealth and making full use of resources; the protein can be used as a natural antibacterial agent, food additive or medicine, and can be used in the food and pharmaceutical industries .

The invention discloses a Streptomyces Phaeochromogenes SICAU417 and its application. The strain has been preserved. The preservation unit: China Center for Typical Culture Collection (CCTCC), address: Bayi Road, Wuchang District, Wuhan City, Hubei Province Luojia Mountain, date of deposit: October 8, 2018, deposit number: CCTCC NO: M 2018661. The 16S rRNA sequence of Streptomyces subchromogenes SICAU417 is shown in SEQ ID NO.1. This bacterium has a wide range of antibacterial effects, can promote plant growth at the same time, and has the double-effect function of "fertilizer and medicine". The microbial fertilizer made by using this bacterium is of great significance for reducing the application of chemical fertilizers and pesticides in agricultural planting. .

The invention relates to a preparation method and application of a chickpea polypeptide part. The chickpea polypeptide part is chickpea polypeptide powder prepared by crushing and degeasing chickpeas or chickpeas residues obtained after extracting small molecule compounds with an organic solvent, extracting with ethanol, purifying with C18 reversed-phase column chromatography, preparing total polypeptide part with an ultrafiltration membrane technology, refining with a modern spray drying technology or freeze drying technology. Through verification, the chickpea polypeptide powder part has antibacterial and antifungal activities, has wide antimicrobial activity and a certain antioxidant activity and hypoglycemic activity, has the effects of enhancing the humoral immunity and general immunity and is enriched in pure natural plant source polypeptides and proteins which are easily digested and absorbed by the human body. The chickpea polypeptide powder part has the characteristics that the chickpea polypeptide proteins are remained, and the aims of changing the wastes into valuable materials and fully utilizing the resources are achieved; and moreover, the chickpea polypeptide powder serves as natural antibacterial agents, food additives or medicines and can be applied to the food and medicine industries.

The invention provides a copper-rare earth compound antimicrobial agent and a preparation method and an application thereof. The antimicrobial agent is compound carrier prepared by chemically-synthesized sodium zirconium phosphate and natural tourmaline according to the weight ratio of 1.2-5.7:1 and loaded by copper ions and rare earth ions by an ion exchange method, wherein the content of the copper ions is 3.4-9.0wt percent, the content of the rare earth ions is 1.5-4.5 wt percent, and the rare earth comprises La, Ce, Nd, Sm and Eu. The preparation method comprises the steps of exchanging the copper ions and the rare earth ions into the carrier through a liquid phase or solid phase ion exchange method and preparing the compound antimicrobial agent through proper post treatment. Containing three antimicrobial active centers of the copper ions, the rare earth ions and negative ions, which can generate synergistic effect, the compound antimicrobial agent has the characteristics of better thermal stability and light resistance, stable color and low cost, and can be added to materials such as plastics, rubber, fiber, coating, bonding adhesive, ceramics and the like for preparing antimicrobial functional materials and products.