47results about How to "Reduce the amount needed" patented technology

The invention relates to a halogen-free phosphate fire retardant used for engineering plastics and a method for producing the same, belonging to the engineering plastic fire retardant and the method for synthesizing the engineering plastic fire retardant technical field. The chemical name of the fire retardant is hydroquinone double phenyl bisphosphate oligomer, and the chemical structural formula is shown on the bottom right. The method comprises the following processing steps: firstly, the method adopts hydroquinone and phosphorus oxychloride as raw materials and a lewis acid as a catalyst for heating reaction; and secondly, the reaction mixture is heated up and dripped with phenol for reaction by taking the lewis acid as the catalyst. The production method has sufficient supply of the raw materials and simple reaction conditions, can reduce the manufacturing cost, and makes products have obvious price advantage; and simultaneously the material has the characteristics of zero halogen, low smoke, low toxity, low corrosiveness, high heat distortion temperature, good fire resistance, good processability, capability of being recycled, etc., and can be widely used as the fire retardant of various engineering plastics.

An extruder has a barrel extending from a feed inlet end to an extruder outlet end. The barrel has an inner surface, an outer surface, and a wall thickness between the inner and outer surfaces. The extruder also has at least one heating member positioned provided on the barrel; a screw drive motor drivingly connected to a rotatably mounted screw positioned within the barrel, whereby the screw is rotatable at various revolutions per minute (RPM); and a controller is operably connected to the screw drive motor to adjust the RPM of the screw based upon a temperature of material passing through and/or being extruded from the barrel. Methods for operating an extruder filling a mold are also provided.

The present invention belongs to the field of oxygen-containing bleaching agent preparing technology. Sodium carbonate solution is emulsified and hydrated to prepare hydrated sodium carbonate suspension, and hydrated sodium carbonate suspension is reacted with 25-70 % concentration hydrogen peroxide solution to obtain crystal while adding sodium chloride or sodium sulfate as sallification agent,sodium silicate, organic phosphonic acid, EDTA or its sodium salt as crystallization assistant. The said preparation process has fast reaction rate and lowered sodium carbonate content in mother liquid, high sodium percarbonate yield and low material consumption, and the sodium percarbonate product has high active oxygen content, large grain size, high humid and heat stability.

The invention relates to a carbon-based liquid fertilizer. The carbon-based liquid fertilizer is prepared from the following components in parts by weight: 1 to 3 parts of wood vinegar, 2 to 6 parts of a biomass charcoal extract, 1 to 2 parts of biogas slurry, 0.5 to 3 parts of a suspending concentrate, 3 to 8 parts of a nitrogen-phosphorus-potassium fertilizer, 1 to 3 parts of potassium humate, 0.5 to 2 parts of alginic acid, 0.5 to 2 parts of chitin and 0.5 to 2 parts of amino acid. The invention also relates to a system and a method for production of the carbon-based liquid fertilizer. Through application of the carbon-based liquid fertilizer, the yield of a crop is more obviously improved, and the usage amount of a chemical fertilizer can be effectively reduced.

The invention discloses an oilseed rape and wheat stubble hybrid rice water saving direct sowing cultivation method based on smashing, burying and retuning to field of preceding crop straw, wherein the cultivation method combines agricultural machinery with the agricultural technology closely. Appropriately-precocious, high-yield, stress-resistant and high-quality rice and oilseed rape or wheat varieties are selected, after the oilseed rape or wheat is mature, straw smashing during machine harvesting or separate straw smashing after harvesting is adopted, the smashed straw is buried in the field through mechanical farming, direct sowing of hybrid rice is carried out through sowing machines or workers under non-irrigation conditions, emergence and growth of rice seedlings are guaranteed under non-basin irrigation conditions, field management measures similar to normal rice cultivation are not taken until the three-leaf stage of the rice seedlings, and the yield equal to or higher than that of local seedling raising and transplanting rice under equal conditions is obtained finally. The hybrid rice water saving direct sowing cultivation method based on smashing, burying and retuning to field of the preceding crop straw realizes light and simple returning to field and effective utilization of oilseed rape and wheat straw, can substantially save water for rice irrigation and avoid seasonal water consumption peaks and water competition contradictions in rice production in arid regions, and realizes cost-reducing efficient ecological rice cultivation.

The invention discloses a preparation method of an ultrasonic-assisted starch/rosin clathrate-based modified filler, relates to the pulping and paper-making engineering field, in particular relates to the preparation method of the ultrasonic-assisted starch/rosin clathrate-based modified filler, and aims to solve the problem that: inorganic fillers in the prior art have negative effects on the strength properties of finished paper and the application efficiency of sizing agents. The method is as follows: 1, gelatinized starch preparation; 2, rosin saponification liquid preparation; 3, starch/rosin clathrate water-containing system preparation; and 4, starch/rosin clathrate-based modified filler preparation. The preparation method significantly improves the binding force of the inorganic fillers and pulp fiber, and reduces the filling-caused negative effects on the strength properties of the finished paper; the hydrophobic properties of the finished paper can be significantly improved by clathration of hydrophobic rosin in the cavity structure of starch, and the papermaking sizing agent dosage can be reduced.

The invention belongs to the technical field of biology, and relates to novel application of mesenchymal stem cell source exosomes, in particular to building of lncRNA MALAT1 modified fat source mesenchymal stem cells and preparation of the exosome of the mesenchymal stem cells, and application of the exosome to preparation of a hepatic disease treatment biological agent and a liver macrophage targeted biological agent. According to the thought, MALAT1 modified AMSCs are built, and the exosome is prepared; through experiments such as ELISA, WB and streaming in the cell level, the regulation and control advantages of the AMSC-MALAT1-Exo on the macrophage functional phenotype are defined; through in vivo experiments, the curative effect on hepatic diseases and the action advantages on the regulation and control of the liver macrophage functional phenotype of the MALAT1 modified AMSC source exosome are defined. The liver macrophage targeted biological agent or medicine with the improved curative effect is further prepared.

The invention discloses a multi-stage semiconductor thermoelectric power generation and cooling integrated system for a hypersonic flight vehicle, relates to a multi-stage semiconductor thermoelectric power generation and cooling integrated technology for the hypersonic flight vehicle, and aims to satisfy thermal protection and power supply requirement of long-endurance hypersonic flight. Each stage of semiconductor thermoelectric power generation apparatus comprises multiple N type semiconductor thermoelectric materials, multiple P type semiconductor thermoelectric materials and multiple flow-guiding sheets; the N type semiconductor thermoelectric materials and the P type semiconductor thermoelectric materials are arranged at intervals, and are connected in series in sequence through the flow-guiding sheets; the multiple stages of semiconductor thermoelectric power generation apparatuses are connected in parallel to form a multi-stage semiconductor thermoelectric power generation system; heat-conducting insulating layers, tightly attached to the flow-guiding sheets, are arranged on the two sides of each stage of semiconductor thermoelectric power generation apparatus; and a low-temperature channel and a high-temperature channel which are connected are formed in the two sides of the multi-stage semiconductor thermoelectric power generation system respectively. The multi-stage semiconductor thermoelectric power generation and cooling integrated system is applicable to the hypersonic flight vehicle.

A three-dimensional printing device includes a layer former that levels off a supplied powder material to form a powder layer including a flat portion having a predetermined height on a printing table, and a supply amount setter that sets an amount of the powder material to be supplied. The supply amount setter sets, as the amount of the powder material to be supplied, an amount smaller than a reference supply amount corresponding to a volume determined as a result of an area size of the printing table being multiplied by the predetermined height. If an amount smaller than the reference supply amount is set as the amount of the powder material to be supplied, the layer former forms the powder layer having the flat portion such that the flat portion has an area size smaller than the area size of the printing table.

The invention provides preparation and application of XIST-modified adipose-derived mesenchymal stem cell exosomes. By constructing an XIST-modified AMSC, preparing the exudates thereof, and determining the regulation advantage of the AMSC-XIST-Exo on the functional phenotype of the macrophage at a cell level through experiments such as ELISA, WB, streaming and the like, through in vivo experiments, the curative effect of the XIST-modified AMSC-derived exosomes on liver diseases and the effect advantage of the XIST-modified AMSC-derived exosomes on regulating the functional phenotype of livermacrophages are determined. The effective dosage of AMSC-XIST-Exo can be as low as 1 mg/kg. The XIST-modified adipose-derived mesenchymal stem cell exosomes greatly reduces the dose (reduced by tensof times) required by exosol treatment, and improves the application potential of AMSC-Exo and even MSC-Exo in the clinical treatment of liver diseases.

The invention discloses an automotive electronic product thermal fatigue service life accelerated testing method which comprises the steps of respectively obtaining thermal impact durability testing acceleration times, testing time, energization temperature cycle durability testing acceleration times and testing time in a condition of no number change of to-be-tested samples; obtaining the targetthermal impact durability testing time in a condition of no number change of first to-be-tested samples, and obtaining target energization temperature cycle durability testing time on the condition ofno number change of second to-be-tested samples; performing thermal impact durability testing on the condition of the first target sample number and the target impact durability testing time, and performing energization cycle durability testing on the condition of the second target sample number and the target energization cycle durability testing time; and performing preset-time-length random vibration testing on the samples which pass the thermal impact durability testing and energization cycle durability testing, and obtaining the target sample. The method according to the invention can reduce the number of cycle times, testing time length and required amount of testing samples in existing automotive electronic product testing.

The invention provides a rectification process of metal-organic sources. Controlled by PLC, the rectification process of gradient temperature rise, intermittent heat-following total reflux, impurity removal, front fraction collection and product collection is completed. It has wide applicability and most metal-organic sources Compound purification, as long as the crude product contains impurity components with a lower boiling point than the product, it is applicable to this process condition; the invention effectively improves the separation efficiency of impurities in the rectification process, reduces the required amount of the fraction before containing impurities, and improves the efficiency of single rectification. The yield is 3-15%; the degree of automation is high, which greatly reduces the required workload, which is helpful to reduce the cost of the enterprise and control the process stability.

The present invention addresses the problem of providing a carbon fiber for a carbon fiber reinforced composite material which is not easily damaged during a molding process and exhibits an excellentelastic modulus. The carbon fiber has a strand elastic modulus of at least 360 GPa, a strand strength of at least 3.5 GPa, and a single fiber diameter of at least 6.0 [mu]m, and satisfies one or moreof the requirements below. (A) When one end is a fixed end and the other end is a free end that can rotate about the axis of a fiber bundle, the remaining twist number is at least 2 turns/m. (B) The total fineness, which is the product of the single fiber fineness (g/km) as a carbon fiber and the number of filaments (counts), is at least 740 g/km. In addition, the single fiber elastic modulus Es (Gpa) and the loop breaking load A (N) of the carbon fiber satisfy the relationship of expression (1). (1): A>=-0.0017*Es+1.02. Furthermore, the single fiber diameter of the carbon fiber is at least 6.0 [mu]m, the relationship between the strand elastic modulus E (GPa) of the carbon fiber and the knot strength B (MPa) of the carbon fiber as evaluated at a heating loss rate of 0.15% or less at 450 DEG C satisfies expression (2), and the twist number of the carbon fiber is 20-80 turns/m. (2): B>= 6.7*109*E-2.85.

The invention provides a treatment system and a treatment method of a solid-liquid mixture. The treatment method comprises the following steps: adding water in the solid-liquid mixture for diluting, thus obtaining a suspension solution; sorting the suspension solution, thus obtaining a sorted overflow solution and sorted granules; adding leaching water into the sorted granules for leaching, and dehydrating, thus obtaining a leached overflow solution and a removed solid body, wherein the removed solid body can be recycled after leaching and dehydrating; dehydrating the sorted overflow solutionand the leached overflow solution, thus obtaining filtrate and dehydrated residue, wherein the filtrate can be treated in a water treatment stage; controlling the flow of diluted water according to aset value of diluted solid mass fraction, total solid mass fraction, organic matter mass fraction and residual solid mass fraction after a sorting stage. By adopting the technical scheme of the invention, the water consumption for diluting is optimized, so that the stability and the effectiveness of the whole technology are increased, and the total demand for process water is reduced.

Disclosed herein are compositions comprising a sophorolipid surfactant and a bio-synergist and the methods of using the same.

The invention discloses a manufacturing method of an open caisson. The method comprises construction preparation work, foundation pit excavation and sand cushion layer and plain concrete cushion layermanufacturing, foundation pit excavation and sand cushion layer and plain concrete cushion layer manufacturing, open caisson first, second and third section manufacturing, open caisson first sinking,open caisson fourth and fifth section manufacturing, and open caisson second sinking. The open caisson adopts a non-drainage sinking process, the soil taking mode is air mud suction diver matching, and the sinking aiding mode is sinking by a pressing sinking method and sinking aiding by thixotropic mud resistance reduction; and the method further comprises underwater plain concrete bottom sealingof the open caisson, manufacturing of an open caisson bottom plate, and pipeline buttress, blowoff chamber and finishing construction. A five-section manufacturing method and a secondary sinking construction method are adopted; the pouring compactness is convenient to control, the pouring operation difficulty is low, the technical requirement threshold is low, the construction efficiency is high,the quality is easy to control, the construction safety factor is high, and the engineering cost is effectively reduced.