50results about How to "Guaranteed smooth growth" patented technology

The invention discloses a method for breading shrimp postlarvae by biomanipulation. The method comprises the following steps of: selecting the parent shrimp without virus WSSV and TSV, and feeding the parent shrimp with bait without virus WSSV and TSV, wherein the feeding amount per day is 4 to 6 percent of the weight and the parent shrimp is fed for four times; breading the parent shrimp under the conditions that the water temperature is between 26 and 30 DEG C, the salinity is 2.8 to 3.2 percent and the illumination intensity is 100 to 1,000 lx to make the parent shrimp reach sexual maturity; after mating, putting the female shrimp into a spawning pond to make female shrimp lay eggs, and washing and sterilizing the collected fertilized ovum; incubating the fertilized ovum into the nauplius under the conditions that the water temperature is between 28 and 31 DEG C, the salinity is 2 to 3 percent, the pH value is 7.8 to 8.6, dissolved oxygen is 6 to 10mg/l after 13 to 18 hours, putting the nauplius into a nursing pond which is used for culturing seedlings and treated by the water, wherein the density of the nauplius is 200-300 thousand/m<3>; in the late-mid period of the nauplius growing, introducing chaetoceros muelleri without virus according to the concentration of 5*104cell/ml, and when breading nauplius the into the zoea, introducing bacillus subtilis according to the concentration of 1.25*104cfu/ml; and after the shrimp is bred to 0.8 to 1cm, obtaining the seedlings. The whole breading process is subjected to regular PCR detection, and no specific pathogen WSSV and TSV is ensured in the whole breading process. The method has the advantages of no specific virus, rapid growth, high disease resistance, high stress resistance, short breeding period, large and uniform growing standard, high yield, good investment benefit and the like.

The embodiment of the invention discloses an auricularia fuscosuccinea hanging bag cultivation frame which comprises a greenhouse and a micro spray pipeline arranged on a greenhouse roof. A plurality of hanging rope groups extending downwards are hung on the top of the greenhouse, and each hanging rope group comprises a first thread rope, a second thread rope and a third thread rope; each first thread rope, the corresponding second thread rope and the corresponding third thread rope together penetrate through triangular hasps, wherein the triangular hasps uniformly divide the first thread rope, the second thread rope and the third thread rope to form a plurality of the rope sleeves for clamping fungi bags, and the first thread rope, the second thread rope and the third thread rope forming the rope sleeves are uniformly distributed on the columnar surfaces of the fungus bags. The auricularia fuscosuccinea hanging bag cultivation frame has the advantages that the structure is simple, building is convenient, the efficiency is improved, the labor cost is reduced, and meanwhile the cultivation space is fully utilized through three-dimensional cultivation; in addition, full-surface auricularia fuscosuccinea fruiting of the fungus bag surfaces is achieved, the auricularia fuscosuccinea fruiting area is large, and the auricularia fuscosuccinea yield of the fungus bags per unit area is increased; furthermore, uniform humidification of the fungus bag surfaces is effectively guaranteed to avoid the condition that the auricularia fuscosuccinea piece growth vigor is nonuniform.

The invention discloses a yellow mealworm automatic breeding system. The automatic breeding system comprises a central control unit, a breeding conveying device, sieving conveying devices, and an automatic feeding device; the breeding conveying device comprises three or more breeding frames arranged in a stage shape from high to low, and each breeding frame is provided with a belt conveying assembly to correspondingly form multi-stage conveying; one sieving conveying device is arranged between every two adjacent breeding frames for performing sieving on worm skin, worm bodies and worm excrement conveyed by the upper stage of belt conveying assembly under the control of the central control unit, so that the sieved worm bodies enter the next stage of belt conveying assembly for continuous breeding; and the automatic feeding device is movably arranged on one side of the multiple breeding frames, and is used for carrying out uniform feeding on the yellow mealworms on the multiple belt conveying assemblies through movement under the control of the central control unit. The automatic breeding system has the advantages that the operation is convenient, the intelligent degree is high, thebreeding efficiency is high, the breeding effect is good, the occupied area is small, and the labor intensity can be greatly reduced.

The invention discloses a specific molecular marker PCMI-M001 for rapid identification of male seedlings of populus cathayana. A nucleotide sequence of a forward primer PCMI-M001-F of the molecular marker PCMI-M001 is shown as SEQ ID NO:1; a nucleotide sequence of a reverse primer PCMI-M001-R of the molecular marker PCMI-M001 is shown as SEQ ID NO:2; a nucleotide sequence of a specific band obtained by amplification of the marker in a male individual is shown as SEQ ID NO:3. The specific molecular marker (PCMI-M001-F/R) can be used for rapid molecular identification of male and female populuscathayana, and a method is simple, accurate and high in sensitivity and superior to other existing identification methods.

The invention provides a wide wheat seeding ridge lower position uniform fertilizer apparatus, which can complete operations such as wide seeding ridge lower position fertilization, earth covering and seedbed leveling in one time. The wide wheat seeding ridge lower position uniform fertilizer apparatus comprises a ditching device and an earth covering device, wherein the ditching device comprises a supporting leg, a plough tip curved plate, a fertilizer stopping plate, a fertilizer distribution plate, lateral baffles, a rear baffle and an upper cover plate; the plough tip curved plate is located in front of the supporting leg; the fertilizer stopping plate is located below the supporting leg; the fertilizer distribution plate is arranged on the fertilizer stopping plate and located under a fertilizer discharge channel; the lateral baffles are located behind the plough tip curved plate and located on the left and the right sides of the supporting leg; the rear baffle is located behind the supporting leg; the upper cover plate is integrated with the plough tip curved plate, the lateral baffles and the rear baffle to form a cavity with a bottom opening and with the other sides enclosed; the lower part of the supporting leg extends inside the cavity; the earth covering device comprises an earth pressing plate connected with the ditching device, and earth scrapers on both sides of the earth pressing plate.

Degradable pure iron stent or iron alloy stent is provided. The stent is made containing 0.01 to 0.5 atom % of La, Ce or Sr. The stent is surface modified using ion implantation or plasma ion implantation to implant oxygen, nitrogen, La, Ce or Sr into the stent surface. The stent may also be manufactured by depositing a thin film of La, Ce, Sr, lanthana, ceria, strontia, iron or iron oxide onto the stent surface. The thickness of the deposited films is from 10 to 1000 nanometers with the grain size from 10 to 200 nanometers. The corrosion resistance of these stents is significantly increased, and the stents have good biocompatibility. The degradation of the stents is controllable. The stents can also provide sufficient support in blood vessel in 3-6 months after intervention and be degraded after 6 months.

To provide a negative electrode carbon material capable of suppressing capacity degradation which will occur due to repetition of a charge/discharge cycle, storage under a charged state, float charging, or the like. An artificial graphite for a negative electrode of a lithium secondary battery having a c-axis crystallite size L (112) of from 2.0 to 4.2 nm as calculated from a (112) diffraction line obtained by X-ray wide-angle diffractometry and having a half-value width Δν_G of from 15 to 19 cm⁻¹ for a peak appearing in a wavelength region of from 1580 cm⁻¹±100 cm⁻¹ in the Raman spectroscopy using an argon ion laser light having a wavelength of 5145 angstrom.

The invention discloses a milk powder brewing machine. The milk powder brewing machine comprises a main machine, and a water tank, a milk powder chamber and a stirring chamber which are installed in the main machine. A water pump and a heater are installed between the water tank and the stirring chamber. Water in the normal temperature is pumped from the water tank by the water pump and is conveyed to the heater. A water outlet of the heater is communicated with the stirring chamber. The bottom of the milk powder chamber is provided with a leakage port communicated with the milk powder chamber. The leakage port is provided with a milk powder falling mechanism. A stirring rod is installed in the stirring chamber. The stirring rod is driven to be rotated by a power mechanism. While the stirring rod is rotated, the milk powder and the hot water are driven to be mixed. The milk powder brewing machine has the following beneficial effects: the water and the milk powder can be uniformly mixed, the problem of similar products that the milk powder cannot be uniformly stirred and the milk powder agglomeration is reserved in a milk bottle and a mixing chamber can be avoided, and bubbles cannot be generated while the milk liquid is flowed out of the stirring chamber because the liquid outlet uses a mesh design, so the milk liquid is more easily drunk and absorbed by an infant, and the hiccup of the infant is avoided.

The invention provides an air-suction roller type wide-seedling-zone wheat seed sowing device. According to the seed sowing device, operations such as seed dressing, seed suction, seed cleaning and seed sowing can be completed in one time, the unevenness of growth vigor of seedlings can be avoided, the seeding quality is effectively improved, wheat is promoted to grow better, and the effect of increasing both production and income is achieved. The seed sowing device comprises a seed box mechanism, a seed suction roller mechanism, a seed cleaning plate, a positive-pressure inflating mechanism and a pressure relief mechanism, wherein the seed box mechanism comprises a seed box and a seed position adjusting plate arranged in the seed box; the seed suction roller mechanism comprises a seed suction roller and a transmission shaft arranged at the axis of the seed suction roller; the seed cleaning plate is arranged at the circumferential outer side of the seed suction roller and is connected with the seed box; the positive-pressure inflating mechanism is located at the bottom of the seed box and comprises a positive-pressure air inlet pipe and a positive-pressure chamber, the positive-pressure chamber has an air inlet and an air outlet, the air inlet communicates with the positive-pressure air inlet pipe, and the air outlet communicates with the seed box; and the pressure relief mechanism comprises a pressure relief wheel supporting plate connected with the transmission shaft, a pressure relief wheel combination arranged on the pressure relief wheel supporting plate and a tension spring connecting the pressure relief wheel supporting plate and the pressure relief wheel combination.

The invention discloses a liquid surface conditioning agent capable of improving the film-forming property of a phosphating film and a preparation method of the liquid surface conditioning agent capable of improving the film-forming property of the phosphating film. The liquid surface conditioning agent comprises the components, by weight, of 3%-9% of zinc nitrate, 1%-5% of calcium nitrate, 8%-15%of disodium hydrogen phosphate, 2%-4% of polyvinyl alcohol, 3%-7% of sodium alcohol ether sulphate, 2%-5% of trisodium pyrophosphate and 55%-81% of deionized water. The liquid surface conditioning agent is especially suitable for surface pretreatment of steel, aluminum and zinc before phosphating of zinc-calcium series and high in universality; crystallization active points in phosphating can beincreased, the grain size and binding force of the phosphating film are improved significantly, uniform growth of the phosphating film is facilitated, meanwhile, the phosphating temperature can be decreased, the phosphating time is shortened, the appearance quality of the phosphating film is improved, and corrosion resistance and abrasion resistance after phosphating are improved; and the preparation condition is gentle, and repeatability is high.

The invention discloses a method for preparing an aqueous food-grade pigment PR49:1 and belongs to the field of aqueous food-grade organic pigments. The method comprises the following steps: preparinga heavy nitrogen liquid, preparing a chemical liquid, carrying out a coupling reaction, carrying out a color lake reaction and carrying out aftertreatment, wherein a secondary heavy nitrogen component 2-naphthylamine-6-sulfonic acid is used in the step of preparing the heavy nitrogen liquid; secondary coupling components 1-hydroxy-2-naphthoic acid and an aqueous pigment modifier are used in a step of preparing a coupling liquid. The obtained aqueous food-grade organic pigment red 49:1 has lower viscosity and higher coloring performance and glossiness, and is excellent in storage stability.

The invention discloses a zirconium-niobium alloy hip joint prosthesis system containing an oxide layer and a preparation method. The system comprises a femoral stem, a femoral head, a lining and an acetabular cup; the acetabular cup and the femoral stem are prepared from zirconium-niobium alloy powder serving as a raw material through hot isostatic pressing, cryogenic treatment and surface oxidation; the acetabular cup and the femoral stem are provided with a partition bone trabecula; and the femoral stem and the acetabular cup are integrally formed through 3D printing, the problems that a complex structure cannot be manufactured through traditional machining, and connection and matching of an oversleeve and a femoral stem body fail are solved, the bone trabecula and a solid body are highin bonding strength and not prone to disengagement, and the service life of the prosthesis is prolonged. The bone trabecula enables most compressive strain values of bone tissue to be within 1000-3000 microstrain, accords with the bone growth theory, guarantees uniform ingrowth of a bone in a bone trabecula area, and achieves excellent biocompatibility and bone ingrowth of an osseointegration interface and super-strong wear resistance and a low wear rate of a friction interface. The oxidation layer is formed on the surfaces of the femoral head and the lining after oxidation, so that super-strong wear resistance and low wear rate of the friction interface are realized.

The invention provides a pneumatic radial tire which is characterized in that a tire crown part of a tire body profile comprises one or more sections of tangent arcs, at least three longitudinally arranged main grooves and a plurality of transverse grooves are formed in the surface of the tire crown part, and an included angle alpha between a connecting line of a central point O and an end point P1 of the arc of the tire crown part and a horizontal line is less than or equal to 7 degrees; the included angle beta between the connecting line of the contour center position point M of the outermost main groove and the center point O of the crown arc and the horizontal line is less than or equal to 1/2 alpha; and a plurality of pits with unlimited shapes and unlimited arrangement modes are formed in the bottom surfaces of the main ditches or the transverse ditches. By optimizing the contour of the tire crown part and the design of the arc contour of the bottom of the main groove, the tire which is more uniform in tire crown arc growth and better in groove crack resistance under the inflation standard air pressure condition is obtained, and the tire has better wet land drainage performance by additionally arranging the pits in the bottom of the groove.

The present application relates to a microorganism of the genus Saccharomyces producing lactic acid and a method for preparing lactic acid using the same. More specifically, the present application relates to a microorganism of the genus Saccharomyces producing lactic acid, wherein the microorganism is modified to weaken or inactivate the activity of pyruvate decarboxylase (PDC) compared to its endogenous activity, to introduce the activity of ATP-citrate lyase (ACL), and to enhance pyruvate biosynthetic pathway compared to its endogenous biosynthetic pathway, and a method for producing lactic acid using the microorganism.

The invention discloses a vegetable planting device and relates to the field of vegetable planting. The vegetable planting device comprises a framework, a planting frame and planting cups, wherein the planting frame is arranged above the framework, a plurality of planting holes are formed in the planting frame, and the planting cups are arranged in the planting holes; a nutrient solution circulating pipe is arranged between the framework and the planting frame, and a plurality of atomization nozzles are arranged on the nutrient solution circulating pipe; a backflow groove is formed in the framework and under the planting frame, and a nutrient solution blending tank is arranged at one end of the backflow groove; a solution supply pump connected with the nutrient solution circulating pipe is arranged in the nutrient solution blending tank, and a nutrient solution blending mechanism is further arranged in the nutrient solution blending tank; the nutrient solution blending mechanism comprises a nutrient solution supplementing pipe, a water supplementing pipe, conductive electrodes and a float liquid level switch, an electric control valve I and an electric control valve II are arranged on the nutrient solution supplementing pipe and the water supplementing pipe respectively, the conductive electrodes are electrically connected with the electric control valve I, and the float liquid level switch is electrically connected with the electric control valve II. The vegetable planting device is applicable to large-scale planting of aeroponically cultured vegetables.

The invention discloses a cobalt alloy partition bone trabecula femoral stem and a preparation method. The preparation method comprises the steps that cobalt alloy powder serves as a raw material, anintermediate product of the cobalt alloy partition bone trabecula femoral stem is integrally formed through 3D printing, and the cobalt alloy partition bone trabecula femoral stem is obtained throughhot isostatic pressing and cryogenic cooling. The cobalt alloy partition bone trabecula femoral stem structurally comprises a cylindrical head part, a neck part and a stem part. The stem part comprises a stem part near end and a stem part far end. Bone trabecula with different pore diameters and porosities is arranged on the outer surface of the stem part near end, and the bone trabecula is high in bonding strength with a solid body and not prone to falling off. The problems of bone resorption and the like caused by too small or too large compressive strain values of thighbones in the lower areas of the outer side and the inner side of the uniform bone trabecula are solved. The uniform growth of the bone in the trabecular region is ensured.