39results about How to "Uniform and stable release" patented technology

The invention discloses a coating material for controlled release fertilizer, controlled release fertilizer comprising a core layer and an enveloping layer covering the core layer, and a preparation method of the controlled release fertilizer. The coating material comprises 30 to 50 parts of montmorillonite, 40 to 60 parts of mixture of chitosan and chitosan oligosaccharide, wherein the chitosan oligosaccharide consists of oligosaccharide with weight-average molecular weight of 4000 to 6000 and chitosan with weight-average molecular weight of 50000 to 10000, the weight ratio of the chitosan to oligosaccharide is (80% to 95%) to (20% to 5%); 1 to 8 parts of cyclodextrin and 1 to 5 parts of optional cross-linking agent. The controlled release fertilizer is low, uniform and constant in fertilizer releasing speed; all indexes conform to the national standard GB / T 23348-200. Compared with commercially-available non-controlled release fertilizer, under the situation of identical yield of crops, by adopting the controlled release fertilizer of embodiments 1 to 5, the application amount of fertilizer can be reduced by 30 to 40 percent.

The invention discloses a mixture containing a slow-release saline compound, a composite phase-change material and asphalt and a preparation method of the mixture. The mixture containing the slow-release saline compound, the composite phase-change material and the asphalt is prepared from 2-3 parts of the slow-release saline compound, 0.75-0.9 part of the composite phase-change material, 5-6 parts of the asphalt and 100-110 parts of an auxiliary material. The preparation method of the mixture containing the slow-release saline compound, the composite phase-change material and the asphalt comprises the following steps that 1, the slow-release saline compound is prepared; 2, the composite phase-change material is prepared; 3, the asphalt mixture is prepared. According to the method, salt ingredients in the slow-release saline compound are gradually released out, chlorine salt cannot be released to the road surface at a time but gradually released to the road surface under the action of the road surface pressure and the pore water power due to the adsorption action of pelelith powder, the freezing point of the snow water on the road surface is lowered through the salt ingredients dissolved in snow water, an ice and snow melting effect is better under the condition that the road surface is iced in winter, and the problems of road ice and snow melting and driving safety in winter can be effectively solved.

The invention provides a special sheet for tobacco products and a preparation method thereof, which can effectively improve the uniformity and stability of smoke release of tobacco products during the heating process. The preparation method provided by the present invention is as follows: fully mix smoke powder and water in a homogeneous reaction tank; weigh the added fiber, make a pulp, and then add it to the homogeneous reaction tank after being dispersed by a homogeneous pump for mixing; and mix it evenly; prepare the adhesive into a 2% concentration solution and add it into a homogeneous reaction tank to mix evenly; weigh the compounded reaction solution, and the components are: 10-30 parts of enzyme preparation; 5-8 parts of enzyme accelerator 25-40 parts of honey; 10-20 parts of amino acids; 3-6 parts of lactic acid; Reaction under temperature conditions of 70°C-130°C; dehydration and drying; roll forming, drying, and slicing to obtain special sheets for tobacco products.

The application provides an enteric coating for dirithromycin enteric-coated tablets, comprising the following components in parts by weight: methacrylic acid-acrylate copolymer aqueous dispersion 60-70%; titanium dioxide 2-5%; citric acid Triethyl ester 15‑35%, talc 0‑0.5%. The preparation method and coating process thereof are also provided. While improving the stability of dirithromycin enteric-coated preparations, it achieves the characteristics of uniform and stable release, and achieves a better similarity to the dissolution behavior of the reference preparation Dynabac, thus achieving a breakthrough in domestic dirithromycin enteric-coated preparations , to effectively replace foreign listed drugs.

The invention discloses a fibre containing nanopore network prepared from high voltage electrostatic spinning. The fibre containing nanopore network is prepared from the following steps: blending the polypropylene carbonate, polycaprolactone and L-polylactide-tetracalcium phosphate at a mass ratio of (40-98):(1-40):(1-20) and a conductive metal salt which accounts for 0.2-0.5% of the total mass of the three materials, and preparing from a high voltage electrostatic spinning method; the electron microscopy image shows that the fibre is formed by a plurality of mutually connected nanopore networks, and the specific surface area is 115.76-180.45 m<2> / g. The invention further discloses application of the nanopore network fibre in the cartilage tissue engineering. The mutually connected nanopore networks can be formed at the surface and interior of the fibre, so that the specific surface area is increased; because of the good biocompatibility and biodegradability, the cartilage growth capability in the cartilage tissue engineering can be well guided. The fibre containing nanopore network is simple in preparation method, controllable and convenient for mass industrial production.

The invention provides a solid fumigation sterilizer. The solid fumigation sterilizer comprises a casing, a fumigation agent container and an ultrasonic generation device, wherein the casing is of a semi-enclosed opening structure; the fumigation agent container is arranged at the opening part of the casing; the fumigation agent container and the casing jointly define an accommodation space; the fumigation agent container is provided with an air outlet; the ultrasonic generation device is arranged in the accommodation space and is fixedly connected with the inner wall of the casing; the ultrasonic generation device is attached to the outer side of the bottom of the fumigation agent container. According to the solid fumigation sterilizer provided by the invention, a solid disinfectant in the fumigation agent container is subjected to ultrasonic dispersion by the ultrasonic generation device to release sterilizing active ingredients which are dispersed to the outside by the air outlet. The disinfectant disclosed by the invention disperses and releases the sterilizing active ingredients to the air under the action of the ultrasonic generation device for all-round sterilization of thespace without dead angles. In addition, after sterilization is finished, a treatment mode is simple and only ventilation is needed. Meanwhile, by using a solid fumigation agent, the weight of the device is reduced and the device is convenient to carry.

The invention discloses a bupropion hydrochloride sustained-release capsule and a preparation method thereof. The bupropion hydrochloride sustained-release capsule consists of the following components in percentage by weight: 62.50% of bupropion hydrochloride, 6.25% of tartaric acid, 9.26% of rotula, 4.17% of povidone K30, 6.94% of glyceryl palmitostearate, 0.46% of acrylic resin RS100, 9.26% of acrylic resin NE30D, 0.93% of talcum powder and 0.23% of yellow ferric oxide. The bupropion hydrochloride sustained-release capsule is uniform and stable in releasing, after a patient orally takes the bupropion hydrochloride sustained-release capsule, blood concentration is changed stably, after everyday medicine taking frequency is reduced, occurrence rate of adverse reaction is reduced obviously, and compliance of a patient is improved.

The invention provides a sugarcane vinegar aromatherapy agent and a preparation method thereof, and relates to the field of aromatherapy technology. The sugarcane vinegar aromatherapy agent of the present invention is composed of the following raw materials in parts by weight: 4-9 parts of citronella, 8-12 parts of compound essential oil, sugarcane vinegar 15-22 parts, 2-4 parts of sodium alginate, 1-3 parts of isopropyl myristate and 3-5 parts of ethylene glycol; the sugarcane vinegar aromatherapy agent of the present invention adopts natural plant essence, which is green, environmentally friendly, safe and healthy , each raw material can synergize and promote each other, can emit a pleasant smell, relieve fatigue and accelerate human metabolism, in addition, the obtained aromatherapy agent also has the effect of anti-inflammation, sterilization, and inhibition of virus growth, and the aromatherapy agent release speed of the application It is slow and lasts for a long time, and the cost of use is reduced under the premise of ensuring the effect.

The invention relates to a method for preparing cigar-flavored cigarette paper. During the production of cigarette paper, the bacterial cellulose dispersion is uniformly dip-coated on the cigarette paper on a coating machine, and then dried by a rapid low-temperature drying cylinder to disperse the bacterial cellulose. The liquid is closely combined with the cigarette paper and distributed evenly. With the burning of cigarettes, it can give the smoke a strong cigar aroma, which is rich and full, with a natural and comfortable aftertaste. It has a positive effect on improving the sweetness, thickness, and richness of cigarette smoke, reducing the irritation of smoke, and covering up miscellaneous gases. It can stabilize and strengthen the style characteristics of cigar-shaped cigarettes.