39 results about "Planktonic bacteria" patented technology

A biofilm resistant fluid handling system is provided having at least one structural component adapted to retain or deliver fluid. The at least one structural component is formed from a biofilm resistant material comprising polymeric resin and an inorganic carrier conjugated with a biocidal metal ion. When a surface of the at least one structural component is exposed to a continuous or intermittent aqueous solution environment the formation of active biofilm on the surface is prevented and planktonic bacteria in proximity of said surface is killed. Additionally, methods for extending the biocidal properties of a biofilm resistant fluid handling system are provided. One includes continuously or periodically introducing a biocidal metal ion into contents of the aqueous solution environment resulting in equilibrium of biocidal metal ion exchange between the biofilm resistant material of the handling system and the aqueous solution environment, Another includes affixing a solvent, comprising an inorganic carrier conjugated with a biocidal metal ion, to the surface of the fluid handling system.

The invention belongs to the fields of chemical industry and water treatment, and in particular relates to a compound bacteria and algae inhibitor and its application. The composite bacteria and algae inhibitor of the present invention contains isothiazolinone, 2,2-dibromo-3-nitrilopropionamide, solvent and water, and the mass percentages of each component are respectively 1% to 40% of isothiazolinone, 2,2-dibromo-3-nitrilopropionamide 5%-40%, solvent 20%-60%, water 10-70%. The compound bacteria and algae inhibitor of the present invention is a non-oxidative biocide. When the bacteria and algae inhibitor is applied to a water treatment system, the impact type intermittent dosing method is adopted, and the dosage of the bacteria and algae inhibitor per liter of water is 1 mg to 100 mg. . The components of the formula of the present invention have obvious synergistic effect, good compatibility with scale inhibitors and corrosion inhibitors, low biological toxicity, high biodegradable rate, and have killing and inhibiting effects on planktonic bacteria and algae in water, It has stripping and inhibiting effects on the bacteria and algae adherents that grow on the surface of the equipment. In practical application, it has the advantages of small addition amount, low use cost, convenient operation and no pollution.

The invention discloses a novel method for detecting air borne microorganism and a special detection bottle for realizing the method. The detection bottle mainly comprises a transparent bottle body a and a sealing bottle cap b provided with a pumping hole c and a sampling tube e, wherein the sampling tube e is inserted into the bottom of the bottle body; and the upper part of the sampling tube isprovided with a sampling port d, while the bottom is of a porous structure. Before detection, water or a liquid culture medium is arranged in the detection bottle a, and the bottle cap b is covered on the bottle; moreover, the bottom of the sampling tube e is immersed; and the sampling port d and the pumping hole c are corked up and then are sterilized by high-pressure steam for further use. During actual detection, the detection bottle a is positioned in a detected area, and the pumping hole c is connected with a suction device provided with a flowmeter and a timer; the sampling port d is opened, and the suction device is turned on; air in the detected area is cleaned by water or the liquid culture medium e, and then is discharged by means of the sampling tube; when sampling is finished,a coagulating agent is added and stirred evenly; the pumping hole c and the sampling port d are corked up; and finally, cultivation and count are carried out. The method has the advantages of simple operation, accurate result and low cost.

The invention discloses an antibacterial material based on nano silver and photodynamic therapy, a preparation method and application thereof, and belongs to the field of biological nanometer antibacterial materials. The antibacterial material includes polyethyleneimine PEI, Ce6 and silver nanoparticle AgNPs; Ce6 and the amino group on the polyethyleneimine PEI molecular chain are connected by covalent bonds, and the silver nanoparticle AgNPs is encapsulated in the polyethyleneimine connected with Ce6. amine. The material combines the bactericidal activity of AgNPs with Ce6 photodynamic sterilization, which can effectively improve the aggregation of AgNPs and improve the bactericidal activity of the material. The novel AgNPs‑PEI‑Ce6 nano-antibacterial material can effectively kill planktonic bacteria and remove mature biofilms.

The invention discloses an indoor unit of an air conditioner, an air purification device is arranged at an air outlet or an air return port, and the air purification device includes a first LED lamp capable of emitting UVC, a second LED lamp capable of emitting UVA, and a photocatalyst filter screen , wherein, UVA can be irradiated onto the photocatalyst filter. UVC purifies bacteria, viruses and other planktonic bacteria in the air, and UVA cooperates with photocatalyst filter to purify TVOC, formaldehyde, hydrogen sulfide and other harmful gases in the air. The second LED lamp is rotatable relative to the photocatalyst filter to increase the effective irradiation area of ​​UVA on the photocatalyst filter, thereby improving the air purification effect of the photocatalyst filter. Under the double action of UVC and UVA, the air purification device can greatly improve the air purification effect.

To provide a liquid composition for oral cavity, which has excellent osmotic and bactericidal effects on periodontal pathogenic biofilms and bactericidal effects on planktonic bacteria, in addition, suppresses turbidity during high-temperature storage, has good appearance stability, and is effective for periodontal The prevention or inhibition of the disease is effective, and the liquid oral composition is prepared as follows: in the liquid oral composition containing (A) isopropylmethylphenol and (B) cetylpyridinium chloride, add 0.1 to 0.6% by mass (C) N-acyl taurate and 0.1-0.8 mass % (D) nonionic surfactant.

The invention discloses a preparation method of photosensitizer-supported polymeric micelle and an application of the micelle in killing of planktobacteria and bacterial biofilms. The photosensitizer-supported polymeric micelle is prepared from two block polymers PEG-b-PCL and PCL-b-PAE and is used for killing multiple drug-resistant bacteria and biofilms. A photosensitizer supported on composite shell micelle has good sterilization efficiency on bioluminescence gene transfected staphylococcus aureus S.aureus Xen36 drug-resistant to kanamycin and drug-resistant bacteria in the biofilms. A micellar system has the advantages as follows: 1) the preparation is simple; 2) a light source is simple, a complicated controller like a laser is not required, and light energy is very low and is easily converted to the clinical direction; 3) good singlet oxygen production efficiency is realized; 4) the photosensitizer-supported polymeric micelle has good killing effects on the drug-resistant bacteria and the biofilms and has good application prospect.