33results about How to "Avoid complexation" patented technology

Thermoplastic polymer compositions, films, continues, closures, laminates can comprise a modified vinyl polymer said modified polymer having a moiety comprising a cyclodextrin compound. The cyclodextrin compound, locked into the polymer structure, can absorb impurities, permeants, or other undesirable volatile materials. The cooperation between the cyclodextrin grafted onto the thermoplastic polymer and the polymer structure can provide barrier properties to a film, web or other polymer structure. A permeant or a contaminant can be complexed or trapped within the polymer and held within the film or Web preventing the permeant or contaminant from passing into the interior of a container or enclosure.

Thermoplastic polymer compositions, films, continues, closures, laminates can comprise a modified vinyl polymer said modified polymer having a moiety comprising a cyclodextrin compound. The cyclodextrin compound, locked into the polymer structure, can absorb impurities, permeants, or other undesirable volatile materials. The cooperation between the cyclodextrin grafted onto the thermoplastic polymer and the polymer structure can provide barrier properties to a film, web or other polymer structure. A permeant or a contaminant can be complexed or trapped within the polymer and held within the film or Web preventing the permeant or contaminant from passing into the interior of a container or enclosure.

Thermoplastic polymer compositions, films, continues, closures, laminates can comprise a modified vinyl polymer said modified polymer having a moiety comprising a cyclodextrin compound. The cyclodextrin compound, locked into the polymer structure, can absorb impurities, permeants, or other undesirable volatile materials. The cooperation between the cyclodextrin grafted onto the thermoplastic polymer and the polymer structure can provide barrier properties to a film, web or other polymer structure. A permeant or a contaminant can be complexed or trapped within the polymer and held within the film or Web preventing the permeant or contaminant from passing into the interior of a container or enclosure.

The invention discloses a preparation method of a graphene oxide enhanced cement-based mortar material. According to the method, an addition manner of graphene oxide is changed. The method comprises the following steps: rapidly freezing aqueous dispersion of graphene oxide with liquid nitrogen; crushing graphene oxide dispersion ice blocks, and gradually adding standard sand and cement in the process; finally, uniformly stirring the mixture, thereby obtaining the graphene oxide enhanced cement-based mortar material. According to the method disclosed by the invention, the graphene oxide can beuniformly dispersed in a cement matrix, the complexing action between the graphene oxide and calcium ions is well solved, a flocculation phenomenon of the graphene oxide in cement paste is effectivelyavoided, and excellent performance of the graphene oxide is further fully achieved. Moreover, any other dispersing agent does not need to be added, and introduction of impurities is reduced. The method disclosed by the invention provides a novel research thought for preparation of the graphene oxide enhanced cement-based mortar material.

Disclosed are screening processes for identification of compounds that may inhibit complex formation between C-reactive protein and fibronectin. Compounds identified by the disclosed methods may be utilized to inhibit the target analytes that are known to occur during skin aging as well as during the course of several diseases. Accordingly, inhibitory compounds identified by the disclosed methods may be utilized to prevent and treat damaged tissue, inflammatory conditions, cardiovascular conditions, renal conditions, periodontal conditions and obesity, among other conditions. For example, the compounds identified by the disclosed methods may be utilized to treat tissue that has suffered trauma, e.g., burns or wounds, as well as tissue that is inflamed due to any of several causes. The disclosed compounds may also be utilized to improve the accuracy of assays designed to assess CRP or Fn levels in a sample, for instance in a plasma sample, as a risk assessment tool in certain medical conditions and to discover new treatments.

The invention provides a method for analyzing the contents of fluorides in hazardous wastes. According to the method, a pretreated sample is completely combusted in an enclosed space by adoption of anoxygen bomb combustion technology; one part of the fluorine element in the oxygen bomb is absorbed by absorption liquid in the oxygen bomb and the other part is absorbed by absorption liquid in a gasabsorption station through a gas form; the absorption liquid is combined to obtain fluoride extracting solution; and the extracting solution is treated to obtain to-be-tested sample solution. Fluorine ion series standard solution is prepared; and a standard curve is drawn for a negative logarithm (E(Mv)-log cF-(mg/L))of the concentration of fluorine ions via a potential value E. An ion chromatograph-fluoride ion selective electrode is utilized to measure the potential value of the to-be-tested sample solution; and the content of the fluorides is calculated via the standard curve according tothe measured potential value. The method is relatively high in test result correctness and is capable of greatly shortening the test time at the same time.

The invention discloses a gastrodin injection preparation, which comprises the following components by weight: 5-10% of gastrodin, 0.01-0.1% of metal ion complexing agent, 0.6-1.2% of stabilizing agent, 1-2.5% of buffer and the balance of injection water. The invention also provides a preparation method of the gastrodin injection preparation. The gastrodin injection of the present invention can effectively stop the addition of visible foreign matter during a placing process of the gastrodin injection, the defective index of the visible foreign matter in a solution is reduced, the white point and white block precipitation are not generated, the expectation effect can be reached, thereby the treatment effect of gastrodin can be fully performed. The gastrodin injection preparation has the advantages of simple prescription, good stability, high clear degree, safe clinical usage, small adverse reaction and convenient industrial large batch production.

The invention belongs to the technical field of medicine preparation, and discloses preparation methods and quality control methods of a polysaccharide-iron compound and a capsule preparation. The preparation method comprises the following steps of (1) adding an alkaline substance into ferric salt, reacting, and washing a reactant mixture until the conductivity is less than 5 ms/cm to obtain a ferric hydroxide colloid; and (2) adding oligosaccharide syrup into the ferric hydroxide colloid prepared in the step (1), adjusting the pH value to 11-14, reacting, adjusting the pH value to be less than 7, generating precipitates, performing centrifuging, dissolving the obtained precipitates in a solution with the pH value of 11-14, and performing drying to obtain the polysaccharide-iron compound. The content of free iron in the polysaccharide-iron compound prepared by the method is less than 0.05%, the content of heavy metals is less than 7.5 ppm, the loss of syrup in the reaction process can be greatly reduced, and the cost is saved. The prepared polysaccharide-iron compound is used for preparing the capsule preparation.

The invention provides a method for preparing trialkyl phosphate, belonging to the chemical engineering field. The method comprises the steps of reacting by virtue of phosphorus oxyhalide and alcoholin an ice-water bath under the protection of inert gas, cooling a system to room temperature by taking ion exchange resin as a catalyst after the reaction, carrying out reduced pressure distillation to remove redundant alcohol and hydrochloric acid, further removing alcohol and acid in the system in one step by virtue of a bubbling method so as to obtain a trialkyl phosphate rough product, and carrying out reduced pressure rectification, so as to obtain a trialkyl phosphate purified product. By utilizing the catalyst, the compexing with trialkyl phosphate is avoided, so that the adverse effects caused by the complexing between a traditional catalyst and a product are effectively avoided, and the yield and purity of the product are increased; by further removing impurities in a bubbling manner, the impurities remained in the reduced pressure distillation process are effectively removed, so that the yield and purity of trialkyl phosphate are further increased; and the total yield of theproduct is more than 95.9%, and the purity of the product is more than 99.8%.

The invention relates to an anti-scaling ball, which comprises, by weight, 110-130 parts of quartz powder, 50-60 parts of zeolite powder, 40-50 parts of sepiolite powder, and 150-200 parts of an adhesive. According to the present invention, by using the technical scheme, quartz powder, zeolite powder and sepiolite powder have a large amount of pores inside, such that Ca<2+> and Mg<2+> in water canbe effectively absorbed after the anti-scaling ball prepared by adhering the quartz powder, the zeolite powder and the sepiolite powder is added to the water purification device; and quartz powder has characteristics of good hardness, wear resistance, stable chemical property and the like, such that the strength and the corrosion resistance of the ball can be effectively enhanced so as to prolongthe service life of the ball.

The invention belongs to the technical field of pharmaceutical preparations and relates to an iohexol injection and a preparation method thereof. The iohexol injection comprises the following constituents in parts by weight: 50-85 parts of iohexol, 0.05-0.25 part of a stabilizer, 0.01-0.05 part of a chelating agent, and 80-100 parts of water for injection, and is prepared by mixing the constituents, and at last using hydrochloric acid with a concentration of 1 mol/L to regulate the pH value to be 7.0-7.4. Compared to the prior art, the iohexol injection adopts the chelating agent with appropriate amount to avoid complexation between the basic remedy and polyvalent metal ions, so as to increase the product stability, ensure that the injection in each batch is undifferentiated in the color, obviously reduce the visible foreign matters and greatly increase the production yield as the product cannot be influenced by the polyvalent metal ions during the preparation process; the preparation duration can be shortened as the injection is prepared with water at 60-65 DEG C; after low-temperature adsorption, the carbon is removed to avoid that the novel visible foreign matter appears as the injection is recrystallized due to cooling after high-temperature adsorption and filling, so as not to cause low yield.

The invention discloses a preparation method of a purple sweet potato pigment. The method comprises the following steps: performing cleaning, airing and cutting. taking an acetic acid aqueous solutionas an extracting agent, carrying out crude extraction according to a solid-liquid ratio of 1: 4, carrying out freeze thawing treatment on the purple sweet potato strips twice, combining pigment crudeextracts, and carrying out vacuum concentration to obtain a pigment concentrated solution; treating the pigment concentrated solution with a graphene oxide dispersion solution, carrying out primary purification, and carrying out centrifugal separation to obtain supernatant; pre-treating and packing adsorption macroporous resin SP70 into a column, and injecting a supernate pigment liquid into a resin layer, wherein the sample loading flow rate is 3.0-3.5 BV/h; washing the resin layer after adsorption saturation with 2BV clear water, wherein an eluent is prepared from 70% ethanol and 0.5% acetic acid, the elution flow rate is 2.0-2.5 BV/h, and the elution volume is 5BV; and collecting eluate, and performing vacuum concentrating and freeze-drying to obtain a purple sweet potato anthocyanin pigment dry product. According to the method, an alcohol solvent is not used, the pigment extraction rate is increased through freeze thawing treatment, impurities such as proteins are removed throughthe adsorption effect of graphene oxide in the purification process, the anthocyanin complexing effect is avoided, the purification effect is improved, and the high-purity purple sweet potato anthocyanin pigment is obtained.