31results about How to "Influence of physical and chemical properties" patented technology

The invention discloses a broad-spectrum soil heavy metal passivating microbial inoculum as well as a preparation method and application thereof. The broad-spectrum soil heavy metal passivating microbial inoculum contains Geobacter sulfurreducens HMP-1 and an auxiliary material. According to the broad-spectrum heavy metal passivation microbial inoculum, sulfydryl (-HS) rich on the surface of Geobacter sulfurreducens HMP-1 thalli directly forms metal sulfide minerals with heavy metal ions, so that the toxicity of heavy metal in the environment is reduced. The microbial agent can effectively solve the problems that the existing biological microbial agent is limited in heavy metal type remediation, not direct in passivation effect and large in economic investment, the removal rate of heavy metals in soil and rice reaches 70% or above, the toxicity of broad-spectrum heavy metals is reduced under the condition that the physical and chemical properties of the soil are not affected, and meanwhile, the cost is reduced. The development of a heavy metal pollution microbial remediation technology is promoted.

The invention discloses a unit arc bamboo splint flattening and shaping method. The method comprises the following steps of: removing internal and external joints after splitting moso bamboo at a fixed length to obtain a unit arc bamboo splint; softening the unit arc bamboo splint, wherein the unit arc bamboo splint is first softened to 90-110 degrees in a softening treatment pool for 20-22 hours; flattening the unit arc bamboo splint in a segmental way; feeding the unit bamboo splint in a treatment box with constant temperature of 20-40 degrees by using upper and lower press rolls; applying a certain pressure to the unit bamboo splint by using the upper and lower press rolls in the feeding process so as to flatten the unit bamboo splint; spraying cold water to the flattened unit bamboo splint so as to carry out cold treatment and shaping so that the overall dimension of the bamboo splint is stable; and finally, thickening and trimming the unit bamboo splint to obtain a bamboo splint with desired size. The unit arc bamboo splint flattening and shaping method disclosed by the invention has the advantages of simplified operation process and high working efficiency; and the machining process from the softened unit bamboo splint to the finished product is one-step molding.

The invention discloses a production method of high-dispersibility high-stability insoluble sulphur, and belongs to the technical field of sulphur production. The production method of high-dispersibility high-stability insoluble sulphur comprises the following steps that liquid sulphur is used as raw materials; a gasification-sharp cooling method is used for preparation to obtain middle-grade insoluble sulphur; then, the middle-grade insoluble sulphur is sequentially subjected to extraction, drying, sieving and oil filling treatment to obtain the insoluble sulphur product, wherein when the obtained middle-grade insoluble sulphur is subjected to drying treatment after the extraction, a proper amount of stabilizing agents are added; in addition, during oil filling treatment, a proper amountof fatty alcohol-polyoxyethylene ether is added; the stabilizing agents are prepared from ammonium persulfate, sodium ethyl xanthate and iodine. By using the production method provided by the invention, the thermal stability and dispersion performance of the insoluble sulphur can be effectively improved, so that the application effect is ensured.

The invention discloses an anti-penetrating water-based ink used for decorative paper. The anti-penetrating water-based ink is composed of, by weight, 45 to 55% of titanium dioxide, 15 to 20% of casein resin, 0.5 to 3% of a dispersant, 4 to 6% of propylene glycol, and the balance deionized water. The invention also discloses a preparation method of the anti-penetrating water-based ink used for decorative paper. The preparation method comprises following steps: (1) deionized water and propylene glycol are delivered into a dispersing kettle, casein resin and the dispersant are added, an obtained mixture is stirred to be uniform, titanium dioxide is added, and a water-based ink is obtained via stirring dispersion using a dispersion machine; (2) the obtained water-based ink obtained via stirring dispersion is delivered into a bead mill for grinding; and (3) after grinding, the water-based ink is filtered so as to obtain the water-based ink finished product. The anti-penetrating water-based ink used for decorative paper is capable of improving penetrating resistance of low gram weight decorative body paper to be as excellent as that of high gram weight decorative body paper, and solving a problem that press penetrating of high gram weight light color decorative paper is easily caused.

The invention discloses a cardiac valve modified by laminating a hydrophilic compound network and a preparing method of the cardiac valve. According to the cardiac valve modified by laminating the hydrophilic compound network, the multi-layer compound network structure is constructed on the surface of the crosslinking-fixed homogeneous or heterogeneous biological valve through a layer-by-layer overlapping coating mode, the contact angel of the surface of the valve is 15-80 degrees, and the hydrophilic modified biological valve is obtained. According to the hydrophilic compound network laminating structure on the surface of the valve, the first layer is a low-molecular-weight water-based polymer and inorganic nanoparticle mixed crosslinked film layer, and the second layer, the third layer,the fourth layer and the fifth layer are high-molecular-weight water-based polymer and inorganic nanoparticle mixed crosslinked film layers. The cardiac valve modified by laminating the hydrophilic compound network has excellent blood coagulation resistance, adhesion resistance and calcification resistance, thrombi and calcification spots can be remarkably reduced, after-implantation restenosis ofthe valve can be effectively prevented or reduced, and the calcification and early deteriotation of the valve are effectively prevented.