32results about How to "Increase the wall area" patented technology

A method of etching a deep, high aspect ratio opening in a silicon substrate includes etching the substrate with a first plasma formed using a first gaseous mixture including a bromine containing gas, an oxygen containing gas and a first fluorine containing gas. The etching process with the first gaseous mixture produces a sidewall passivating deposit, which builds up near the opening entrance. To reduce this buildup, and to increase the average etching rate, the sidewall passivating deposit is periodically thinned by forming a second plasma using a mixture containing silane and a second fluorine containing gas. The substrate remains in the same plasma reactor chamber during the entire process and the plasma is continuously maintained during the thinning step. Holes of a depth greater than 40 times the width may be produced using repeated cycles of etching and thinning.

The invention discloses a method for mass production of pseudorabies virus vaccine, comprising the following steps: (a) adding netty polyester fiber which serves as a carrier into a bioreactor provided with a tide type micro-carrier suspension culture system and inoculating cells for producing vaccine; (b) inoculating pseudorabies virus vaccine when the culture cell grows to a certain intensity, so that the cells are infected by the pseudorabies virus vaccine; (c) reproducing the virus in great numbers under appropriate conditions; (d) harvesting the virus when cytopathic rate reaches above 70%; (e) carrying out freeze thawing on the harvested virus for once or twice to lead the cells to completely come off and disperse and then adding freeze-drying protective agent, evenly mixing the mixture, packaging the mixture in fixed volume and freeze-drying.The method of the invention has the advantages of good stability, explicit process control indicators, good controllability, easy operation, large process scale and the like.

A fuel cell assembly or system including flexible metal bellows elements in one or more tubes intended for carrying hot gases during operation of the assembly. The bellows elements include a tubing element having plurality of annular corrugated folds. Thermal expansion and contraction of rigid tubes and of the non-tubular elements of the assembly can lead to buckling, cracking, and failure of the tubes and failure of the assembly or system. The flexible bellows elements, having relatively low axial and radial spring rates thus are able to absorb thermal and vibrational dimensional changes in the assembly. In addition, the corrugations provide significant resistance to axial heat flow and large radiant surface area, thus increasing thermal isolation where desired between relatively hot and relatively cold regions of the assembly.

The invention discloses a painting device suitable for the wall surface of a corridor, which comprises a horizontal plate; a track frame is arranged above the horizontal plate; the track frame is provided with horizontal track grooves distributed up and down, and pulleys are nested in the track grooves. The pulley is rotatably connected to the moving frame through the connecting rod; the moving frame is rotatably connected to the brush roller; the left side of the brush roller is provided with a paint spray port. The present invention is provided with interlocking piston barrel, brush roller and paint spray port, so that the paint is evenly sprayed on the brush roller, the effect of roller coating is good, the paint is saved at the same time, and the quality of paint painting is improved; The mixing barrel of the material barrel can efficiently stir and mix the paint, making the paint even and fine, convenient for suction and spraying, and improving the spraying quality of the paint; the invention is provided with triangular wheels and abutting plates, so that the device can be better Climbing steps and fixings increase the mobility of the unit, which in turn increases the efficiency of painting.

The invention belongs to the technical field of intelligent internet-of-things plant walls, and discloses a simple mobile intelligent illumination plant wall device based on internet of things, and acontrol method. After relevant information of a power supply module, a semi-automatic water and fertilizer system and a planting module is acquired by signal sensors which are uniformly distributed ina plant wall support frame, a system controller processes the data, and the working stage of a fan, a water tank and an intelligent illumination module is displayed on a display and controlled. Whenthe humidity and temperature are not normal, an alarm gives out sound, a flashing lamp is turned on to give an alarm, and alarm signals are transmitted to a mobile terminal device through a bluetoothmodule or an internet of things gateway. The invention provides the novel intelligent plant wall capable of remotely acquiring the plant wall information at any time and any place and controlling theworking state of the plant wall. Wall bodies with different sizes can be formed by splicing, the whole system is designed by adopting modularization, and the plant wall device is quite convenient to mount and dismount. In addition, the plant wall can be also moved, so that indoor placement and layout are convenient.

The present invention relates to a high pressure homogenizer and a method for manufacturing graphene using the same, and according to one aspect of the present invention, there is provided a high pressure homogenizer comprising a channel module which comprises a microchannel through which an object for homogenization passes, wherein the channel module comprises at least one baffle disposed so as to partition the microchannel into a plurality of spaces and the baffle is provided so as to partition the microchannel into two spaces along the width direction or the height direction.

The invention discloses a human placenta chorionic mesenchymal stem cell separation method, which comprises: 1) taking healthy human placenta chorionic tissue, cutting into strip blocks, and completely rinsing with physiological saline; 2) adding a proper amount of physiological saline, chopping the chorion into fine particles by using a homogenizer, and rinsing with physiological saline until the solution is clarified; 3) treating again with the homogenizer to achieve micro-particles, and carrying out centrifugation to remove the upper layer blood cells; 4) adding an enzyme to the precipitate, digesting, carrying out centrifugation, and separating the precipitate; 5) carrying out centrifugal washing with physiological saline twice, adding a culture medium to the precipitate, inoculating, and culturing; and 6) discarding the tissue blocks and the culture medium at the 7th day, rinsing the bottom of the culture flask by using physiological saline, adding a fresh culture medium, changing the culture medium every 3 days until the cell fusion degree achieves 80-90%, and carrying out digestion passage with trypsin to obtain the human placenta chorionic mesenchymal stem cells. According to the present invention, the operation is simple and rapid, and the high-quality human placenta chorionic mesenchymal stem cells can be obtained.

The invention relates to a method for preparing porcine parvovirus inactivated vaccines, and belongs to the field of biotechnology. The method for preparing the porcine parvovirus inactivated vaccines includes the following steps: (1) culturing of cells used for vaccine preparation, (2) virus inoculation and culture, (3) virus liquid harvest, (4) virus liquid inactivation, and (5) vaccine preparation. Seed virus used for vaccine preparation and cells are screened, matching degree between the virus and the cells is strengthened, a riptide perfusion type bioreactor culture system is used for improving multiplication titer and harvest yield of the virus, immune effects are improved through the improvement of an emulsification process and a whole production process does not involve other biosafety and public health problems and is suitable for large scale production.

A coil assembly for an evaporative refrigerant condenser having a plurality of nested pairs of serpentine heat exchange tubes tightly packed adjacent to one-another; each nested pair of serpentine heat exchange tubes having an outer serpentine tube and an inner serpentine tube having an identical number of straight lengths and having parallel vertical and horizontal axes.

The invention relates to the field of culture containers, especially to a cluster layout of a completely automatic biological product system. The cluster layout of the completely automatic biologicalproduct system comprises a culture container bottle whole body, a fully permeable cap and cell adherent wallboards, wherein the culture container bottle whole body comprises a bottom collector of centrifugal bottles, a bottle mouth, an inner cell adherent wall, a slope board and the cell adherent wallboards, the slope board is arranged in the bottom collector of centrifugal bottles, the inner celladherent wall is arranged at one end of the bottom collector of centrifugal bottles, multiple groups of cell adherent wallboards are arranged in the inner cell adherent wall, and a graduation scaleplate is arranged outside the culture container bottle whole body. According to the present invention, the cluster layout of the complete automatic biological product system can be used as a single container in the process of adherent cell culture, can be used for culture, centrifugation, sample observation, transportation and other operations, the operation of opening/closing the cap, the operationof liquid transporting, storage of multi-type containers and conversion of multi-type containers in the whole process of automated production can be simplified, and the production efficiency and benefit can be effectively improved.

The present invention provides a Group III nitride semiconductor device in which current concentration at the corners of the trench is suppressed. The semiconductor device has a pattern in which regular hexagonal unit cells are arranged in a honeycomb pattern. The semiconductor layer is sectionalized into regular hexagonal patterns by the trench. The recess has a small regular hexagonal pattern contained in the regular hexagonal pattern of the semiconductor layer sectionalized by the trench, which is obtained by reducing the regular hexagon of the semiconductor layer with the same center. Moreover, the regular hexagonal pattern of the recess is rotated by 30° with respect to the regular hexagon of the semiconductor layer. The Mg activation ratio is lower in the vicinity of corners of the trench than that in other regions in the vicinity of side walls of the trench of the p-type layer.

The invention provides a coil type heat exchanger. The coil type heat exchanger comprises a coil and a metal corrugated pipe. The coil type heat exchanger is characterized in that the metal corrugated pipe with the large caliber is mounted in the coil, openings in the two ends of the metal corrugated pipe are exposed out of openings in the two ends of the coil, and the openings in the two ends of the coil and the outer wall of the metal corrugated pipe are sealed through injection molding, hot melting, welding or colloid; a first joint is mounted at one end of the coil, a second joint is mounted at the other end of the coil, a third joint is the opening in one end of the metal corrugated pipe, and a fourth joint is the opening in the other end of the metal corrugated pipe; the metal corrugated pipe is a copper corrugated pipe or a stainless steel corrugated pipe; and the coil is a rubber coil or a plastic coil. According to the coil type heat exchanger, the runner is long, the metal corrugated pipe with the large caliber is used for flowing of waste hot water, blocking is not likely to happen, the heat exchange efficiency is high, and the coil type heat exchanger can be widely applied to recovery of waste hot water and hot energy generated in household bathing, hairdressing and beauty, large bath centers and industrial production.

The invention discloses a hot melting machine system and a method thereof. The hot melting machine system comprises a hot melting head, wherein a groove is formed in the bottom wall of the hot meltinghead; a groove shaped step is arranged on the outer wall of the middle section of the hot melting head; the hot melting head is made from uncommon ceramic material; the deformation quantity of the uncommon ceramic material at 200 DEG C is 0.02%; the thermal conductivity the uncommon ceramic material is 115W/(m.K); and the hardness of the uncommon ceramic material is 1200 HV. The hot melting machine system further comprises a heating plate, a prepressing plate and a lower die sequentially arranged from top to bottom. By combining with other structures or methods, the defects in the prior art that when hot melting is simultaneously carried out on multiple points, hot melting heads have position interference to cause poor hot melting effect, and the hot melting heads cannot effectively gather temperature of the hot melting points to cause poor hot melting effect are effectively avoided.

The invention provides an annular casing pipe type heat exchanger. The annular casing pipe type heat exchanger comprises a plastic pipe, a stainless steel corrugated pipe and bundling pieces. The annular casing pipe type heat exchanger is characterized in that the stainless steel corrugated pipe is arranged in the plastic pipe, openings in the two ends of the stainless steel corrugated pipe are exposed out of openings in the two ends of the plastic pipe, and the openings in the two ends of the plastic pipe and the outer wall of the stainless steel corrugated pipe are sealed through injection molding or hot melting or welding or glue; a hole is formed in the pipe wall at one end of the plastic pipe, and a first connector is arranged on the hole in the pipe wall in the manner of injection molding or hot melting or welding or glue; a hole is formed in the pipe wall at the other end of the plastic pipe, a second connector is arranged on the hole of the pipe wall, the opening in one end of the stainless steel corrugated pipe is provided with a third connector, and the opening in the other end of the stainless steel corrugated pipe is provided with a fourth connector; and the plastic pipe provided with the stainless steel corrugated pipe is manufactured into a spiral shape, and the plastic pipe is twisted by the bundling pieces to be shaped into a ring shape. Waste hot water flows through the stainless steel corrugated pipe with the diameter ranging from 10 mm to 70 mm, blockage is not likely to happen, and the heat energy of the waste hot water can be better recycled.

The invention discloses an ice making box, and belongs to the technical field of ice making equipment manufacturing. The ice making box comprises an ice making box body, the ice making box body is provided with a groove, a convex part is arranged in the groove, the ice making box body selects a metal material as the material, an aluminum material or a copper material is selected as the material of the ice making box body, the convex part is cylindrical or conical, and the average diameter of the convex part ranges from one third to two thirds of the diameter of the groove. According to the ice making box, by arranging the convex part, the wall surface area of cold and water heat exchange is increased, cold conduction is already changed into three-dimensional conduction of the wall surface of the ice making box body and from the convex part to the center of the groove from one-way conduction from the peripheral wall surface of a traditional ice making box to the center of a groove, and the ice making efficiency is greatly improved.