71results about How to "Reduce water loss rate" patented technology

The present invention provides a method for producing a silicone hydrogel having a high water content. The method comprises the following steps:

• • (a) polymerizing a monomer mixture to form the silicone hydrogel, wherein the monomer mixture comprises at least one silicon-containing monomer and at least one ionic monomer; and
  • (b) placing the silicone hydrogel in an alkaline solution for at least 20 minutes, wherein the alkaline solution has a pH not less than 7.5 and the ionic monomer is present in an amount not less than 0.7 wt % based on the total dry weight of the silicone hydrogel.

The invention discloses a storage battery charging method, which comprises the following steps of: measuring the temperature of a storage battery, calculating a limiting voltage, judging whether to enter a limiting voltage charging stage or not, and after entering the limiting voltage charging stage, judging whether the charging of the battery is finished or not according to time integration power and time integration current. The method has the advantages that: in the initial stage of cycle life of the storage battery, in the constant voltage charging stage of the battery, the charging current of the battery is exponentially normally reduced; the time integration charging power and the time integration charging current related in the charging method hardly produce influence on the charging of the battery, and ensure the battery can be normally sufficiently charged; by the charging method provided by the invention, the limitations of the time integration charging power and the time integration charging current force the charging limiting voltage to be exponentially reduced and force the charging current to be reduced to reduce water loss, prolong the service life and completely eradicate the occurrence of battery charging thermal runaway phenomena.

The invention belongs to a method for preserving vegetables, which relates to a process for preserving asparagus at a low temperature. The process comprises the steps that: after the dirt is removed from the asparagus by water, the asparagus is precooled; then the precooled asparagus is put in a chitosan preservative solution for immersion; after being fished out and dried with air, the asparagus is stored at the temperature of 2 DEG C. By adopting the chitosan as the preservative, the method of the invention is used for preserving the asparagus in a low-temperature environment, thus effectively inhibiting the respiration of the asparagus, lowering the dehydration rate and deferring the aging of the asparagus.

A microporous silica-filled polyolefin separator (80) has a material composition that includes a fraction of cured rubber powder exhibiting low or no porosity. The cured rubber powder is a material derived from one or both of passenger and truck tires. The cured rubber powders exhibit the properties of increasing hydrogen evolution overpotential on the negative lead electrode and of decreasing the effect of antimony deposited on the negative electrode of the lead-acid battery. Incorporation of these cured rubber powders into the formulation of a microporous silica-filled polyethylene separator results in improved electrochemical properties in deep-cycle lead-acid batteries.

The invention provides a silicone hydrogel. The silicone hydrogel comprises a reaction product of a monomer mixture for forming the silicone hydrogel, and water, wherein the water is not less than 50 percent of the total weight of the integral silicone hydrogel; the monomer mixture comprises at least one silicon-containing monomer and at least one ionic monomer; and the ionic monomer is not less than 0.7 percent of the total weight of the dry weight of the integral silicone hydrogel. The invention also provides an ophthalmic object prepared from the silicone hydrogel.

The invention relates to a method for improving soil quality. The method is characterized in comprising a step of mixing sandstone with soil needing improvement, wherein the ratio of sandstone to soil is (1: 2)-(1: 6), and preferably 1:4. In the method, before sandstone is mixed with the soil needing improvement, there is a step of crushing sandstone. The particle size of the crushed sandstone is lower than 20mm. Further, the method provided by the invention is characterized in that the content of the mixing step is that the sandstone is flatly laid on the soil needing improvement, and is well mixed with soil manually or with a mechanical device. The mechanical device is a rotary tiller. With the rotary tiller, a rotary tillage amount is 2-3 times. The invention also relates to an application of the sandstone in improving soil quality.

The invention provides a method for preparing polysiloxane hydrogel with high moisture content. The method includes the following steps: polymerizing monomer mixtures to form the polysiloxane hydrogel, wherein the monomer mixtures comprise at least one silicon-containing monomer and at least one ionic monomer; and placing the polysiloxane hydrogel into an alkaline solution for at least 20 minutes, wherein, the PH of the alkaline solution is not smaller than 7.5, and the content of the ionic monomer is no less than 0.7 wt. % of total weight of overall polysiloxane hydrogel dry weight.

The invention provides a tuber storage method. The method includes the following steps that firstly, raw materials are harvested, wherein tubers which are not damaged are harvested and selected; secondly, pre-storage is conducted, wherein ventilation, airing and preprocessing are conducted; thirdly, tubers are selected, wherein the damaged tubers and the rotted tubers are removed; fourthly, the tubers are packaged and stacked, wherein the tubers are packaged with mesh bags or plastic boxes and placed on stacking piles; fifthly, the tubers are put in storage, wherein the tubers are stored in a ventilating heat-preserving storehouse or a multifunctional storage fresh-keeping storehouse; sixthly, the tubers are moved out of the storehouse. The storage period is long, storage is not influenced by seasons, freshness and flavor are kept, and quality is good.

The invention relates to a positive electrode lead paste for prolonging the high-temperature cycle life of a lead-acid battery and a preparation method thereof. The utility model belongs to the technical field of starting lead-acid batteries. It mainly solves the problem that the cycle life of SAE J2801 lead-acid battery is less than 15 units. The invention has main characteristics : a positive lead paste formula: lead powder comprising 78.2%-80.2%; Red Dan 2.6%-2.7%; Staple fiber 0.05%-0.06%; 0.09%-1.00% organic binder; 0.02% 0.05% Interface improver; 7.0%- 7.5%dilute sulfuric acid; 10.0%-10.5%Pure water. The invention has the characteristics of reducing the water loss rate, reducing the positive grid corrosion rate and the number of SAE J2801 cycle life test units under high-temperature environment being more than 15 units, and is mainly used for starting lead acid battery to prolong its high-temperature cycle life.

The invention discloses a preservation method for processing sweet cherry by salicylic acid. The method comprises the following steps: soaking sweet cherry fruits with uniform size and without mechanical injury in an aqueous solution of salicylic acid, taking out the sweet cherry fruits, and airing; and putting the aired sweet cherry fruits into an open PVC (polyvinyl chloride) film bag, storing at 4 DEG C and with relative humidity of 78% for 6h, binding the bag, and storing at 4 DEG C. The analysis on the change of some sensory quality of fruits during storage after picking and on the change of catalase activity, peroxidase activity, phenylalnine ammonialyase and other related enzymatic activity proves that through the treatment with salicylic acid, the water loss rate and the total soluble solid decrease rate of sweet cherry in the storage process can be effectively lowered, the rotting rate of sweet cherry is lowered, the high commercial value and edible value of sweet cherry can be kept for a long time, the capability of resisting outside threat, especially threat of microorganism infection, of sweet cherry is enhanced, the preservation effect is obviously superior to that of a control group, and the storage performance of sweet cherry is improved. The method is a safe, effective and simple preservation method of sweet cherry.

A method of making a rubber-containing polyolefin separator entails preparing a pre-mixture (18) that includes polyolefin material (1), silica (2), and processing oil (5) and delivering the pre-mixture to a multi-zone extruder (12) having a sheet die (34). The pre-mixture becomes partly gelled as it advances in the extruder. Rubber powder (6) added at a medial zone (Z4) of the extruder combines with the pre-mixture advancing in the extruder to form a gelled rubber-containing extrudate as it exits the sheet die. The extrudate is processed by extracting a portion of the processing oil to form a separator sheet with dispersed rubber powder in the form of domains of larger average size. The larger rubber domains exhibit a smaller average ratio of surface area to volume and thereby results in slower release by diffusion of the beneficial substance from the rubber domains to the battery electrolyte.

The invention discloses a lead storage battery capable of overcoming early capacity attenuation of a lead-calcium alloy battery and a preparation method of the lead storage battery, and belongs to thetechnical field of storage batteries. The preparation method comprises the following steps: (1) carrying out dry mixing on antimony trioxide or antimony pentoxide, fibers and lead powder, adding water, carrying out wet mixing, and adding a sulfuric acid solution to form a paste object with a specific gravity of 3-3.8; (2) dipping a lead-calcium alloy grid into the paste object, and wrapping the surface of the lead-calcium alloy grid with the paste object to form a transition layer; (3) coating a grid with the transition layer with the lead plaster to obtain a green plate; (4) carrying out curing under the condition that the temperature does not exceed 55 DEG C to obtain a positive plate; and (5) assembling the battery, adding an electrolyte, and performing inner formation to prepare the lead storage battery. According to the invention, the transition layer with high antimony content is formed on the surface of the lead-calcium alloy grid in advance, and an antimony-containing corrosion layer discharge more difficultly than an active substance, so that a passivation layer cannot be formed on a grid-active substance interface, and early capacity attenuation of the battery is effectively overcome.

The present invention provides a silicone hydrogel comprising a reaction product of a monomer mixture for forming the silicone hydrogel and water, wherein the water is present in an amount not less than 50 wt % based on the total weight of the silicone hydrogel. The monomer mixture comprises at least one silicon-containing monomer and at least one ionic monomer, wherein the ionic monomer is present in an amount not less than 0.7 wt % based on the total dry weight of the silicone hydrogel. The present invention also provides ocular articles made from the silicone hydrogel.

Granules containing mixtures of silica powder and cross-linked rubber powder are used in the manufacture of battery separators or vehicle tires. A granule contains silica and rubber powders in proportional amounts that form a silica powder carrier within which rubber powder particles are distributed. Incorporating silica-rubber granules in the manufacturing process of polyethylene separators offers a way to limit water loss in and improve the cycle life of a deep cycle lead-acid battery. Incorporating silica-rubber granules in the manufacturing process of vehicle tires affords advantages including easier material handling, reduced production of dust, and reduction in the number of ingredients measured and added to the formulation.

The invention discloses a concrete water reducing agent, which relates to the technical field of production of concrete, and aims at solving the problems that the existing water reducing agent has adverse impact for the coagulation time of the concrete. The concrete water reducing agent is prepared from the following raw materials: water reducing agent mother liquor, an anti-cracking agent, hydroquinone, p-toluenesulfonic acid, sodium methacrylate sulfonate, sodium gluconate, triterpene saponin, chitin, ammonium citrate, a defoaming agent, isopropanol, modified kaolin and water. The inventionalso discloses a preparation method of the concrete water reducing agent. According to the water reducing agent prepared by the invention, the anti-cracking agent is added, so that the water loss speed of the newly poured concrete surface can be slowed down, the water loss speed of the newly poured concrete surface is not greater than the bleeding speed, and the shrinkage and cracking probabilityof the concrete can be effectively reduced; and the bonding strength of cement can be improved, the compressive and flexural properties of concrete can be enhanced, and the prepared concrete water reducing agent has good retarding effect. The concrete is short in coagulation time, high in strength, good in construction performance and high in practical value.

The invention discloses a cement fly ash profile control agent for plugging of oil and water well comprising the constituents (by weight ratio) of, sulfoaluminate salt superfine cement 10-15, coal ash 15-20, sodium carboxymethylcellulose 0.5-0.9, carboxymethyl hydroxyethyl cellulose 0.3-0.7, WP-2 micro expansion agent 0.2-0.5, tannin sulfonate 0.1-0.2, alum 0-0.2 and balancing water.

The invention relates to the technical field of plant genetic engineering, in particular to application of ZmbHLH148 protein and a coding gene thereof in regulation and control of plant drought resistance. It is found that after the ZmbHLH148 gene is over-expressed, the growth of a transgenic plant is obviously better than that of a wild type under the drought treatment condition, the relative water content of leaves of the transgenic plant under the drought condition is obviously higher than that of a control group, and the water loss rate of in-vitro leaves of the transgenic plant under the normal growth condition is obviously lower than that of the control group; therefore, the drought resistance of the plant can be obviously improved after the gene is over-expressed. Gene resources are provided for cultivating and improving new varieties of drought-resistant plants, and a theoretical basis is provided for clarification of a molecular mechanism of ZmbHLH148 in plant drought stress signal response.

The invention discloses an agricultural product freshness preservation method and relates to the technical field of agricultural product freshness preservation. In the cultivation process, from the maturation period, calcium salt is sprayed to agricultural products, the calcium salt is nitrate, a spraying method is that the nitrate is sprayed once every 1-2 weeks, the concentration of the nitrate is 0.5%-1.5%, and 1-2.5 L of the nitrate is sprayed to each plant; in the maturation period, the agricultural products are bagged with transparent paper bags, or a light reflection film is paved; the bags are removed 9-12 days before the harvesting period, and the transparent paper is common white thin paper with good light transmission performance or vegetable parchment. By means of the technical scheme, the production efficiency is high, and the freshness preservation steps are reasonable; by means of the method for agricultural product freshness preservation, the phenomenon that the agricultural products have black hearts or rot can be effectively avoided, the water losing speed of the agricultural products can be remarkably reduced, and the freshness preservation effect is ideal.

The invention discloses anti-cracking plant nourishing hand cream, and belongs to the field of daily chemicals. The anti-cracking plant nourishing hand cream is prepared from, by weight, 40-70 parts of deionized water, 5-12 parts of glycerol, 3-9 parts of dipropylene glycol, 5-12 parts of urea, 6-9 parts of cetyl ethyl hexanoate, 3-6 parts of glyceryl isostearate, 2-9 parts of dimethyl silicone polymer, 1-6 parts of stearic acid, 2-9 parts of xylitol, 5-13 parts of dipotassium glycyrrhizinate, 1.5-3 parts of hyaluronic acid, 1-3 parts of PEG-5 glyceryl stearate, 1-4 parts of vitamin E, 8-18 parts of plant essential oil, 2-6 parts of acrylate/C10-30 alkyl acrylate cross-linking copolymer and 0.5-1.5 parts of preservative. After the anti-cracking plant nourishing hand cream is used, a continuous protective oil film or polymer film can be formed on skins to reduce water loss speed, oil, water and moisturizing factors are dynamically balanced, local skins are in a good moistened state, andthe anti-cracking plant nourishing hand cream is safe, non-toxic and good in anti-cracking effect.

The invention discloses a cochineal suspension cultivation method and device thereof. The method comprises the following steps, building a water trough for injection, folding a newspaper into a triangle paper bag, putting cochineal insects into the paper bag, and using a pin to fix the paper bag in a low part of a cactus stem; covering a layer of 5cm pine needles in the water trough, then compacting the soil, and injecting water until the pine needle is submerged. The method of injecting water into water through in the greenhouse has the advantages of greatly improving the humidity in a shed, lowering the temperature, slowing down a water loss rate of the cactus stem and reduce a mortality of the pupil in the young stage. On the other hand, because cactus stems is not easy to lose water and it improves a feeding efficiency of cochineal, which greatly increases the yield of a single stem on the cochineal; the average number of female cochineal adults of a single stem increase to 124. In addition, the method of hanging the cactus stem slices in the screen greatly improves the utilization efficiency of the greenhouses by more than three times.

The invention relates to a water reduction agent special for a concrete prefabricated component. The water reduction agent is prepared from the following components: a water reduction agent mother solution, an anti-cracking agent, methacrylol polyoxyethylene ether, sodium gluconate, triterpenoid saponin, a surface treatment agent, a defoaming agent and water. By adopting the water reduction agentspecial for the concrete prefabricated component, the water reduction rate when the concrete prefabricated component is produced is greater than or equal to 40 percent, the condensation time is 60 minto 120 min, the strength in one day is greater than or equal to 140 percent, the strength in three days is greater than or equal to 150 percent, the strength in seven days is greater than or equal to150 percent, the strength in 28 days is greater than or equal to 130 percent, and the shrinkage cracking probability of the concrete is decreased by 35 percent or more; and the surface finish degreeis increased by 40 percent or more.