141results about How to "Reduce biodegradation" patented technology

A microfluidic device includes, in one embodiment, a first silk film coupled to a second silk film with at least one microchannel therebetween.

A curable starch composition comprising a mixture of a starch and a curing agent having a functional group complementally reactive with at least one hydroxyl group contained in a starch molecule; and a modified starch having at least one substituent selected from the group consisting of a hydrocarbon group, acid group, blocked isocyanate group, isocyanate group, oxidative polymerizable group, radical polymerizable unsaturated group and amide group in a starch molecule.

Methods of retarding the setting of a cement composition comprise including one or more secondary amines substituted with a carboxyl group or salts thereof (e.g., 3-hydroxy N,N′-iminodisuccinic acid) in the cement composition. The inclusion of such materials in cement compositions may be highly beneficial. In wellbores having BHCT's of less than or equal to about 250° F., the use of the secondary amine as the set retarder ensures that the thickening time of the cement composition is sufficient to allow the cement composition to be pumped to its desired downhole location. Further, the secondary amine may be used in combination with conventional set retarders to enhance the ability of those retarders to increase the thickening time of the cement composition at higher BHCT's, e.g., from about 250° F. to about 525° F.

A chewing gum composition includes at least one biodegradable gum base polymer, at least one sweetener and at least one flavor, the composition having low tack effected by a plurality of side chains attached to the backbone of at least one gum base polymer.

This invention relates to a biodegradable implant including magnesium, wherein the magnesium contains, as impurities, (i) manganese (Mn); and (ii) one selected from the group consisting of iron (Fe), nickel (Ni) and mixtures of iron (Fe) and nickel (Ni), wherein the impurities satisfy the following condition: 0</(i)≦5, and an amount of the impurities is 1 part by weight or less but exceeding 0 parts by weight based on 100 parts by weight of the magnesium, and to a method of manufacturing the same.

Provided are: a biodegradable plastics composition which controls a biodegradation rate with a synergistic controlling effect on three components, adjusts a hydrolysis rate, and shows significantly improved weatherability; a molded article of the composition; and a method of controlling the biodegradation rate of a biodegradable plastics. The biodegradable plastics composition includes: a biodegradable plastics; and a carbodiimide compound, an ultraviolet ray absorbent, and an antioxidant to be blended as essential ingredients into the biodegradable plastics, and the molded article of the composition is also provided.

The invention relates to a method for processing phenol-containing waste water by anaerobic-aerobic coupling biofluidized bed, firstly making the waste water enter in a regulating pondage and then enter in a biofluidized bed containing macroporous suspended carriers for aeration and degrading the waste water by the anaerobic-aerobic coupling biotreatment; then draining the degraded waste water out of the biofluidized bed, placing still, draining upper-layer standard-reaching water, discharging a small part of the lower-layer water with deposited mud and returning the large part to the biofluidized bed for continuing taking part in the waste water processing process. And it implements coupling of anaerobic and aerobic biodegradations.

Cement compositions may comprise one or more secondary amines substituted with a carboxyl group or salts thereof (e.g., 3-hydroxy N,N′-iminodisuccinic acid) for retarding the setting of such compositions. The inclusion of such materials in cement compositions may be highly beneficial. In wellbores having BHCT's of less than or equal to about 250° F., the use of the secondary amine as the set retarder ensures that the thickening time of the cement composition is sufficient to allow the cement composition to be pumped to its desired downhole location. Further, the secondary amine may be used in combination with conventional set retarders to enhance the ability of those retarders to increase the thickening time of the cement composition at higher BHCT's, e.g., from about 250° F. to about 525° F.

The invention discloses a double controlled release film agent of implanted antineoplastic agent mitomycin and a manufacturing method; the invention relates to a medicinal controlled release film agent. The invention provides a double controlled release film agent of implanted antineoplastic agent mitomycin, which relates to a medicinal controlled release film agent with high enveloping ratio, long continuous release duration, small incidence of burst release, few toxic and side effects, high medicine concentration on tumor lesions and low recrudescence probability of tumor, and a manufacturing method. The film agent includes mitomycin, polymer, lecithin, chitosan and collagen. The mitomycin and the lecithin are dissolved, lyophilized in order to obtain a colloidal mixture; the polymer is dissolved in organic solvent in order to obtain a polymer solution; the polymer solution is then added in the colloidal mixture in order to obtain a reverse micelle; the reverse micelle is further added to a polyvinyl alcohol solution, and an O/W latex is obtained by emulsification; the latex is lyophilized in order to obtain carrier micro-spheres; the collagen is dissolved in the acid solution in order to obtain a collagen solution; the chitosan is dissolved in the acid solution in order to obtain a chitosan solution; the collagen solution and the chitosan solution are mixed in order to obtain a collagen-chitosan mixture solution; finally the carrier micro-spheres are dispersed in the collagen-chitosan mixture solution which is then poured in a mould and dried.

The invention relates to a medicament for fast preventing the malignant float grasses and the water algae and the application thereof, belonging to the pesticide formulation technical field, which is characterized in that the medicament comprises from 40% to 90% of a plant vinegar fluid, from 5% to 35% of an organic acid, and from 1% to 20% of pesticide addition agent, the plant vinegar fluid is either a bamboo vinegar fluid, a wooden vinegar fluid, and (or) grass vinegar fluid, the organic acid is one of or a mixture of more than one of a formic acid, an acetic acid, a propionic acid, a 2-methyl propionic acid, an ethyl acetic acid, a 4-hydroxy ethyl acetic acid, a pentanoic acid, a benzoic acid, a 2,6-hydroxy benzoic acid, a 3-hydroxy-4-methoxy benzoic acid or a 3-methoxy-4-hydroxy benzoic acid. The medicament has the advantages of fast destroying the chlorophyll, stopping the plant to do the photosynthesis, commonly killing the water algae in a half hour and the float grass in three hours by spraying, having low production cost, strong killing capability, wide adaptable temperature range and pH value range. The active component of the invention has the advantages of being the natural-occurring substance, no corrosion, nonirritant, safe use, and reliability, easy biodegradation, and no secondary pollution.

The invention provides a cabazitaxel albumin nanoparticle preparation and a preparation method thereof. The cabazitaxel albumin nanoparticle preparation comprises cabazitaxel, albumin and pharmaceutically necessary auxiliary materials and can be prepared with a high-pressure homogenization method, a film shearing method, a solvent evaporation method and the like. According to the cabazitaxel albumin nanoparticle preparation and the preparation method thereof, problems of the drug loading capacity and the stability of existing albumin nanoparticles are solved; a low-toxicity organic solvent is adopted, so that highly allergic reactions due to the fact that Tween-80 is adopted in a cabazitaxel injection liquid can be avoided; by the aid of the high permeability and the retention effect of the nanoparticle on tumors, more drugs can be targeted passively to be concentrated in tumor tissue, so that the anti-tumor effect is improved; the preparation method is simple and suitable for industrial mass production.

An apparatus for use in a liquid treatment process, and a method of use is described. The apparatus comprises an inlet configured to be connected to a source of liquid to be treated and an outlet for discharging liquid from the apparatus. At least one liquid treatment vessel or conduit is disposed between the inlet and the outlet, and is arranged to expose liquid in the vessel to ultraviolet radiation in an advanced oxidation process reaction. A source of ultraviolet radiation extending along the liquid treatment vessel or conduit, such that an annular flow volume is defined in the vessel or conduit around the source of ultraviolet radiation. A rotary device is disposed in the annular flow volume and a drive mechanism drives rotation of the rotary device. The rotary device is operable to induce cavitation in a liquid present in the annular flow volume.

The invention identifies a narrow subset of Mycobacterium latency associated antigens and or epitopes that are capable of eliciting an immune response in vivo and in vitro in a mammal. The invention provides methods and compositions for detection and immunization against latent Mycobacterium infections. These compositions comprise those Mycobacterial latency antigens that are actually capable of eliciting an immune response in vivo, in mammals experiencing a latent Mycobacterium infection. More preferably the compositions comprise those antigens that are preferentially recognized by latently infected individuals and which antigens are not, or to a much lesser extent, recognized in individuals having an active Mycobacterium infection or in individuals having Mycobacterium induced symptoms or diseases, such as in patients infected with M. tuberculosis suffering from tuberculosis disease (TB).

The invention discloses a preparation method of a food-grade full-degradable high-temperature-resistant polylactic acid composite material, and belongs to the field of biodegradable high polymer materials. The composite material comprises, by weight, 100 parts of poly-l-lactic acid (PLLA), 1-10 parts of poly-d-lactic acid (PDLA) and 0.5-1 part of functional additives. Compared with traditional petroleum-based high polymer materials, the composite material has the advantages of being easy to degrade and renewable; compared with common polylactic acid, the composite material has excellent heat resistance. Thus, the polylactic acid composite material can be applied to high-temperature-resistant food packages.