817results about How to "Not easy to remove" patented technology

The invention relates to a method for cleaning a polyphenylene sulfide melt spinning spinneret. Regarding that high polymer has the characteristics of high decomposition temperature, organic and inorganic solvent insolubility, based on the actual condition that the polyphenylene sulfide is firmly attached on the spinneret and is hard to clean, according to the principle that structural components of chemical substances are similar and compatible, the method adopts biphenyl-biphenyl ether served as cleaning agent to complete cleaning of the spinneret in a cleaning kettle at 280 DEG C and 0.08MPa under cleaning agent out-kettle circular flowing, and finally completes cleaning of the spinneret through calcining of a calcinator, ultrasonic cleaning and compressed air drying. The cleaning method has short technical process, few used equipment, good cleaning effect and cleaning rate of spinneret attachment reaching 99.999 percent, ensures that the spinneret has no phenomena of deformation, corrosion or decarburization, and is a perfect cleaning method for the polyphenylene sulfide melt spinning spinneret. Components and parts of other spinning machines attached with polyphenylene sulfide high polymer also can be cleaned by using the method.

The invention relates to the combined multi-shell spiral baffle board shell-and-tube exchanger, which includes the shell. One end of the shell is set with the pipe side inlet and the pipe side outlet. The heat exchanging bundle is through the baffle board and connected to the two pipe boards in two ends of the shell. The first internal bushing is set in the shell and the second is set out of the first internal bushing. One end of the second internal bushing is connected to the pipe board and one end of the first internal bushing is set with the clapboard; the shell is installed with the inlet pipe of the out shell and the outlet pipe of the inner shell. The out shell and the middle shell use the whole continuously spiral baffle board; the inner shell uses the non continuously spiral baffle board or bow baffle board or disc-ring baffle board or baffle pole or the whole round baffle board or not setting the baffle board; the baffle board of every shell has the self anti dirty hole. The invention has simplified the process and decreased the pressure loss but increased the compaction and self anti-dirty ability of the heat exchanger; also it decreases the cleaning cost and prolongs the using life.

The process of producing bamboo flake chipboard includes the steps of resolving bamboo longitudinally into large bamboo flakes, drying, gluing, pre-pressing and hot pressing to obtain bamboo flake chipboard in required cross section shape. The bamboo flake chipboard may be used widely in replacing wooden board for building, packing, vehicle, ship, decoration and other fields. The present invention has high bamboo utilizing rate, and lowered material cost and production cost.

The invention discloses an image matching method suitable for automatically detecting the flight quality of the aerial photography. The method comprises the steps that firstly, images are preprocessed, denoising and filtering are respectively carried out on two digital images to be matched, and the two digital images to be matched are obtained with the aerial photography measuring method in the measured area and are two-dimensional images; secondly, SIFT characteristic extracting is carried out, the SIFT characteristic extraction is respectively carried out on the two digital images through a data processor, all characteristic points of the two digital images and SIFT characteristic descriptors of all the characteristic points are obtained; thirdly, a kd tree is established to carry out the bi-directional search to determine matching points; fourthly, gross error removing is carried out according to the RANSAC algorithm. According to the method, the steps are simple, design is reasonable, the achieving process is convenient, robustness and the using effect are good, and the method can effectively solve the problem that according to an existing method, matching is prone to failure matching or error matching.

The invention discloses a SiC nanowire in-situ enhanced SiCf/SiC composite material and a preparation method of the SiC nanowire in-situ enhanced SiCf/SiC composite material. The composite material is prepared from a SiC fiber prefabricated part, SiC nanowires and a SiC ceramic matrix, wherein the SiC nanowires grow on a fiber surface of the SiC fiber prefabricated part in situ; the SiC nanowires are mutually wound to form a net-shaped structure; the SiC ceramic matrix is arranged in a pore of the SiC fiber prefabricated part. The preparation method comprises the following steps: (1) carrying out surface chemical modification treatment; (2) loading a catalyst; (3) carrying out chemical vapor deposition; (4) impregnating a precursor and cracking. The SiC nanowire in-situ enhanced SiCf/SiC composite material provided by the invention has the advantages that the SiC nanowires are uniformly distributed and are combined with SiC fibers well, the toughness is good and the density is high and the like; the preparation method is simple in process, low in requirements on equipment, environmental-friendly, and good in process commonality; the introduction volume fraction of the SiC nanowires is high and is controllable.

The present invention discloses intermediates of chiral alpha-amino boric acid esters, chiral alpha-amino boric acid esters and salts thereof, and key intermediates for the synthesis of bortezomib. The invention also discloses a preparation method for the intermediates of the alpha-amino boric acid esters, and a method for synthesis of the bortezomib by using chiral alpha-amino boric acid esters and salts thereof and using a convergent strategy. According to the present invention, the bortezomib synthesis process route is low in cost, key intermediates are low in production cost, and operations are simple, very easy for industrial production.

The invention relates to the technical field of grinding equipment, and particularly discloses a turbine shell end surface grinding device. The device comprises a grinding unit, a dust suction unit and an abutting unit; the grinding unit comprises a horizontal shaft, the end part of the horizontal shaft is connected with a grinding disc, and the grinding disc is provided with a groove; the dust suction unit comprises an air cylinder and a cam, the cam is fixed on the horizontal shaft, a piston rod of the air cylinder abuts against the periphery of the cam, a spring is fixedly arranged below anair cylinder piston, an air outlet one-way valve and a first air inlet one-way valve are arranged on the side wall of the air cylinder, a through hole is formed in the horizontal shaft, a dust suction hole is formed in a grinding wheel, the horizontal shaft is connected with a dust suction pipe, the dust suction pipe communicates with the first air inlet one-way valve, a branch pipe communicatingwith the dust suction pipe is further arranged, and the branch pipe is inserted into a mounting hole of a turbine shell; and the abutting unit comprises an inflator, a positioning block is slidably connected in the inflator, the air outlet one-way valve is connected with an exhaust pipe, and the exhaust pipe communicates with the inflator. By adopting the technical scheme, scrap iron can be cleared at the same time in the grinding process, so that manual cleaning is not needed.

The invention provides a method for detecting a biochemical oxygen demand. The method comprises the following steps of performing microculture on a microbe containing water sample from active sludge, surface water, domestic sewage or microbe containing industrial waste water, thus obtaining a microbial film; enabling a blank water sample and a target water sample to pass through the microbial film respectively, detecting and obtaining dissolved oxygen reduction current of the blank water sample and the target water sample, thus obtaining a dissolved oxygen reduction current difference value between the target water sample and the blank water sample; and obtaining the biochemical oxygen demand of the target water sample according to the dissolved oxygen reduction current difference value and a preset standard curve. According to the method, since the microbial film obtained by culturing the microbe containing water sample from active sludge, surface water, domestic sewage or microbe containing industrial waste water has high environment adaptation capacity, a buffer solution system is not required and the physiological activity can be maintained by taking one or more then one of running water, well water, dropping water and underground water as a medium.

The invention relates to a strain of achromobacter xylosoxidans GD03 with oxidation effect and methylation effect on inorganic trivalent arsenic, and a preliminary application in repair of seedling-stage paddy rice arsenic poisoning. The strain was preserved in China General Microbiological Culture Collection Center (CGMCC) at Jan 26th, 2013, and has a preservation number of CGMCC No. 8512. The achromobacter xylosoxidans of the invention is characterized in that the achromobacter xylosoxidans GD03 with oxidation effect and methylation effect on inorganic trivalent arsenic is obtained by enrichment and separation from arsenic-polluted simulated rice field soil. The strain can oxidize inorganic trivalent arsenic in arsenic-polluted environment into pentavalent arsenic, has methylation effect, greatly reduces the toxicity of trivalent arsenic with high toxicity in the environment, and enhances the adsorbable removing property of arsenic pollutants.

The invention relates to the field of polypeptide medicine preparing methods and particularly relates to a teduglutide preparing method. The preparing method includes: preparing a first polypeptide fragment by adopting Asp-Gly dipeptide and amino acids as raw materials; synthesizing C-end polypeptide fragment-resin and a middle polypeptide fragment; coupling the middle polypeptide fragment and the first polypeptide fragment in sequence onto the C-end polypeptide fragment-resin according to the peptide sequence of the teduglutide to obtain teduglutide resin; and splitting the teduglutide resin and purifying. A Gly side chain protective group in the Asp-Gly dipeptide is Dmb or Hmb. The first polypeptide fragment has an amino acid sequence shown as SEQ ID NO:1 or SEQ ID NO:2. The C-end polypeptide fragment has an amino acid sequence shown as SEQ ID NO:3, SEQ ID NO:4, or SEQ ID NO:5. The number of the middle polypeptide fragment is 1-3. The method avoids formation of a five-membered ring and increases the purity.

The invention discloses a data correcting method for high-precision data acquiring system. The data correcting method includes system error correcting and data denoising filtering. Data sampled by the system are firstly subjected to zero error correction and zero error and gain error correction by a gain error correcting and compensating system and are subjected to denoising filtering by two-stage filtering scheme. Noise easier to remove in the data can be subjected to primary filtering through the first-stage overbalance filtering and recurrence average filtering algorithm, and noise hard to remove can be filtered through secondary improved weighted average wavelet threshold value denoising method. According to characteristics of error and noise in the system, composite processing mode of error correction and two-stage denoising filtering is adopted. Not only can cane system error be reduced greatly, but noise is almost completely suppressed. Signal noise ratio is increased, some details of signals are highlighted and subsequent work is facilitated.

The invention relates to a cleaning system and a cleaning method of a dry-jet wet spinning spinneret plate for preparing polyacrylonitrile protofilaments. The cleaning system comprises a pre-soaking device used for pre-soaking the spinneret plate, a cyclic cleaning device used for carrying out cyclic cleaning on the spinneret plate and a steam treatment device used for carrying out steam treatment on the spinneret plate. The cleaning method comprises the following steps of pre-cleaning the spinneret plate by utilizing DMSO (Dimethylsulfoxide); flushing the pre-soaked spinneret plate through desalted water; cyclically cleaning the spinneret plate by the DMSO; flushing the cyclically cleaned spinneret plate through the desalted water; carrying out steam treatment on the spinneret plate through the steam; carrying out ultrasonic cleaning on the spinneret plate subjected to the stream treatment; blowing the spinneret plate subjected to the ultrasonic cleaning by compressed air; detecting the cleaned spinneret plate and repeatedly treating the unqualified spinneret plate until the spinneret plate is qualified. The cleaning method has the advantages of short process flow, less using equipment, simple equipment structure and very good cleaning effect, and the cleaning rate of attachments of the spinneret plate is up to 99.99%.

The invention specifically relates to a preparation method for a guide vane inner ring split combined type hollow ceramic mold core, which belongs to the technical field of precision casting. The method comprises the following steps: with SiO2 powder, ZrO2 powder and a binder as raw materials, heating the raw materials to 120 to 140 DEG C to form slurry; injecting the slurry into a die so as to obtain a basin part and a back part of the ceramic mold core; combining the basin part and the back part together and roasting the combined basin part and back part in a high temperature furnace; carrying out soaking in a reinforcing liquid for 0.5 to 3 h after roasting so as to obtain split type hollow ceramic mold cores; and placing the five split type hollow ceramic mold cores on a platform, carrying out combining through ceramic chamber linings to eventually form the guide vane inner ring split combined type hollow ceramic mold core and brushing an yttrium sol on joints so as to realize smooth and even transition. According to the invention, the manufacturing difficulty of the ceramic mold core is substantially reduced, the size of the ceramic mold core is effectively controlled, and the ceramic mold core has the advantages of good high temperature strength, easy demolding and the like, thereby achieving the purposes of reduction in casting deformation and improvement of a product qualified rate.

The invention belongs to the technical field of medicines, and relates to a method for extracting astaxanthin from haematococcus pluvialis. The method comprises the steps of culturing a seed stock solution in a glass apparatus with a drainage system, and carrying out later amplification culture of the haematococcus pluvialis and accumulation culture of the astaxanthin after 10-15 d; centrifuging a culture in an exponential growth period of seed culture; and inoculating cell clusters in a BBM basal medium to obtain a primary culture. The later accumulation culture of the astaxanthin is amplification culture by using a breathable plastic bag type simple device provided by the invention. In the accumulation stage, a stress culturing method is adopted to obtain a lab-scale test haematococcus pluvialis culture; and haematococcus pluvialis powder is obtained by spray drying. According to a preparation technology that extracts astaxanthin from the haematococcus pluvialis by adopting an ultrasonic cell disruption assisted mixed solvent extraction method, the haematococcus pluvialis powder is added in an organic solvent to carry out ultrasonic cell disruption, and then the astaxanthin is obtained by the steps of reflux extraction in a water bath, suction filtration, filtrate merging and concentration. Compared with a conventional direct extraction method, the method provided by the invention saves extraction time, and increases astaxanthin yield.

The invention discloses a wood sugar oxidation achromobacter SY8 and appliance in purifying arsenic contamination aspect in environmental microbiology technical domain, which is characterized by the following: separating a wood sugar oxidation achromobacter SY8 from arsenic contamination soil; possessing oxidation for inorganic tervalence arsenic; oxidizing inorganic tervalence arsenic to inorganic pentavalent arsenic in arsenic environmental pollution; decreasing toxicity of arsenic in environment; decreasing adsorbing removing property of arsenic; setting the preserved number as CCTCC NO: M207048. This strain possesses better applying prospect in arsenic pollution aspect.

The invention relates to an indoor large-scale breeding and feeding method for greater wax moth, which belongs to the field of indoor breeding and feeding technology for resource insects. The method comprises the following steps: collecting robust and matured larva individuals as breed sources and putting the larva individuals into a container equipped with a pupation device for pupation; taking out greater wax moth pupae in a week and putting the greater wax moth pupae into a container equipped with an egg collection device; taking out the egg collection device in a week, taking off eggs, putting the eggs and a feed into a breeding container according to a certain ratio and replenishing the feed when about 90% of the feed in the container is consumed; and taking out matured greater wax moth larvae when the matured greater wax moth larvae crawl out from the feed, selecting big matured greater wax moth larvae as breed sources for reproduction again and breeding the rest matured greater wax moth larvae in the feed or using or selling the rest matured greater wax moth larvae as test greater wax moth larvae. The objectives of the invention are to overcome the problems of consumption of considerable labor and time and incapacity of realizing anniversary and volume production in large-scale breeding of greater wax moth and to provide the indoor large-scale breeding and feeding method capable of realizing volume production of greater wax moth.

A process for removing metals existing in the mode of nophthenate, especially calcium, from hydrocarbon oil includes mixing hydrocarbon oil with the aqueous solution of hydrochloric acid or nitric acid, water and demulsifier, emulsifying to change the metals into water-soluble ionic compound, and water-oil separation. Its advantages are low dosage of additive and high efficiency.

The invention discloses a heavy cotton viscose blended dual-elasticity yarn drill fabric, and belongs to the technical field of textiles. The fabric containing 52 to 60 weight percent of cotton, 35 to 42 weight percent of viscose and 4 to 6 weight percent of polyurethane consist of woven 2/1 right oblique yarn drill, warp 40/2 cotton viscose 70D polyurethane covering yarns and weft 40/2 cotton viscose 70D polyurethane covering yarns serving as raw materials. The printing and dyeing processing problems caused by the property of the viscose and dual elasticity of warps and wefts are solved; the properties of cotton, viscose and polyurethane fibers are optimized and combined; and the fabric is flat and bright, uniform luster, slip handfeel, overhanging texture, good fluffing and pilling resistance, plump elasticity and good restoring elasticity, and is comfortable and fashionable to wear.

The invention provides an expression method of a human globular adiponectin-glucagon-like peptide-1 analog (gAd-GLP-1-A) peptide fusion protein. The method comprises the following steps of: constructing a prokaryotic expression vector containing human gAd-GLP-1-A fusion genes, converting Escherichia coliBL21 (DE3), obtaining a gAd-GLP-1-A fusion protein containing 6*His tag from an inclusion body by inducible expression, and further digesting the gAd-GLP-1-A fusion protein by using enterokinase to obtain the protein. Animal research shows that the fusion protein has remarkable activity of reducing blood sugar. The fusion protein can promote pancreas islet beta cells to secrete insulin, improve the insulin resistance and remarkably correct the internal metabolic disturbance of type-2 diabetes, and can be applied to preparation of medicaments for treating the type-2 diabetes.

The invention relates to a heat-insulating layer of a rare earth complex wall body and the manufacturing method of heat-insulating layer material, which belongs to the field of architectural materials. The invention is characterized in that the process for preparation comprises mixing rare earth rubber powder by weight ratio that rubber powder: water = 1:1 to 1.5, adding polyphenyl particles into material which is mixed, the proportion is that rubber powder: EPS particles = 1 kg: 8 L, continuously mixing for 5-10 min to make rare earth rubber powder EPS particle heat-insulating material, mixing rare earth trowel finish sand with water according to the proportion that rare earth trowel finish sand: water = 1: 1 into slurry, making rare earth trowel finish sand slurry, and brushing rare earth rubber powder EPS particle heat-insulating material, trowel finish sand slurry, standard net cloth, rare earth trowel finish sand slurry, flexible putty and face coat on the base layer of the wall body in turn. The invention has good heat-insulating property, strong binding power, high compression strength, good water resistance and flame proof, which is antiseptic, noncorrosive, nontoxic, tasteless and pollution-free, has the function of absorbing ultraviolet ray and infrared ray, and has quick coagulate speed, rapid increase of the strength of materials, and the construction procedure is rapid, timesaving and laborsaving.

The invention provides a Bosea sp. AS-1 strain capable of tolerating pollution of arsenic and antimony and oxidizing As(III). The strain is preserved in the China Center for Type Culture Collection (CCTCC). The address of CCTCC is Wuhan university, Wuhan, China, and the postcode is 430072. The preservation date is April 11st, 2016. The preservation number is CCTCC No.2016190. The 16S rDNA sequence of the strain is represented by SEQ ID No.1. The provided strain is obtained by separating and screening, is capable of oxidizing As (III) into As (V), and thus greatly reduces the harm of As in the environment. The provided AS-1 strain has a strong oxidizing and adapting performance and can be used to treat arsenic pollution.

The invention discloses a method of harvesting white atractylodes rhizome seeds. According to the method, the clarity of the harvested atractylodes rhizome seeds can reach up to above 96% and the hundred-grain weight can reach up to above 2.1532g by determining the best seed harvesting period, harvesting, drying, kneading, removing fuzzes, winnowing, bagging and storing. Compared with the 1.7749g of the hundred-grain weight, the seed quality index can be significantly improved, the empty rate can be reduced, the problems that the seeds are bad in quality and are free from endurable storage can be caused by green and empty seeds due to premature in the prior art can be effectively solved, the harvesting quality of the atractylodes rhizome seeds can be improved, the quality guarantee can be provided for the planting, sowing and seedling raising of the atractylodes rhizome seeds, the waste of atractylodes rhizome seeds can be prevented, the seed quality and seed clarity can be improved by adopting a way of drying and then kneading, and the storage time and germination rate of the seeds can be improved by adding peppers and controlling the storage temperature in a refrigeration house; furthermore, the method has the characteristics of being simple in harvesting method and high in harvesting efficiency.