Patents
Literature
Hiro is an intelligent assistant for R&D personnel, combined with Patent DNA, to facilitate innovative research.
Hiro

3195 results about "Bioengineerings" patented technology

Methods for treating a patient using a bioengineered flat sheet graft prostheses

This invention is directed to tissue engineered prostheses made from processed tissue matrices derived from native tissues that are biocompatible with the patient or host in which they are implanted. When implanted into a mammalian host, these prostheses can serve as a functioning repair, augmentation, or replacement body part or tissue structure.
Owner:ORGANOGENESIS

Special biological fish-fertilizer for aquaculture and preparation method thereof

The invention discloses a special biological fish fertilizer and a preparation method for the fertilizer used in aquiculture; wherein, the biological fish fertilizer mainly comprises raw materials as follows: microbiological preparation, inorganic fertilizers, fermentation organics, micro-mineral amino acid chelate, mineral composites, and water quality improver. The preparation method for the special biological fish fertilizer in aquiculture comprises steps as follows: microbiological preparation is produced; fermentation organics is then produced, and the micro-mineral amino acid chelate is produced, eventually the finished products are made. The special biological fish fertilizer has the advantages of limiting the growth and reproduction of the harmful algae, promoting the large-scale growth and reproduction of the suitable food for fish, effectively improving the water quality and purifying the water environment, strengthening the fish immunity, reducing the diseases, reducing cost due to the small use level, convenient use, mild odor, no pollution to the water, and environment protection. By combining the modern bioengineering technique, low-temperature drying technique, spray-drying technique, and super-fine crushing techniques, the preparation method has the advantages of stable quality for the fish fertilizers and lower overall cost.
Owner:WUHAN KEYANG BIOTECH

Porous material having hierarchical porous structure and preparation method thereof

Disclosed are porous ceramic balls with a hierarchical porous structure ranging in size from nanometers to micrometers, and preparation methods thereof. Self-assembly polymers and sol-gel reactions are used to prepare porous ceramic balls in which pores ranging in size from ones of nanometers to tens of micrometers are hierarchically interconnected to one another. This hierarchical porous structure ensures high specific surface areas and porosities for the porous ceramic balls. Further, the size and distribution of the pores can be simply controlled with hydrophobic solvent and reaction time. The pore formation through polymer self-assembly and sol-gel reactions can be applied to ceramic and transition metals. Porous structures based on bioceramic materials, such as bioactive glass, allow the formation of apatite therein and thus can be used as biomaterials of bioengineering, including bone fillers, bone reconstruction materials, bone scaffolds, etc.
Owner:KOREA INST OF MATERIALS SCI

Lactobacillus plantarum strain having functions of effectively degrading nitrite and strongly producing acid and application of lactobacillus plantarum strain

ActiveCN104531578AHigh ability to degrade nitriteEfficient ability to degrade nitriteBacteriaLactobacillusMicroorganismNitrite
The invention relates to a lactobacillus plantarum strain having functions of effectively degrading nitrite and strongly producing acid and an application of the lactobacillus plantarum strain, and belongs to the technical field of bioengineering. The lactobacillus plantarum strain having the functions of effectively degrading nitrite and strongly producing acid is selected from conventional fermented pickled vegetables in Shenyang peasant families, wherein the strain is named FM-LP1-1, identified to be lactobacillus plantarum, and the strain is preserved in China General Microbiological Culture Collection Center with the preservation number of CGMCC No. 9488 on August 4, 2014. By taking FM-LP1-1 as a fermenting agent for fermenting vegetables, the content of nitrate in the fermented vegetable products is effectively reduced, the fermenting duration of the vegetables is shortened and the fermenting flavor of the vegetables is enhanced; and the strain disclosed by the invention is broad in application prospect.
Owner:NANJING CUIERSHUANG VEGETABLE FOOD

Sphingomonas strain and application thereof in water treatment

The invention belongs to the technical fields of environmental engineering and bioengineering and particularly relates to a sphingomonas strain and applications thereof in the aspects of shortcut nitrification-denitrification of nitrogen-containing industrial waste water and domestic sewage and treatment of a polluted water source. The sphingomonas strain is separated from a Taihu water in China,is a local strain and has high safety; and the strain can be grown in a basic medium, wherein in the basic medium, CO2 is used as a carbon source and energy or CO2 and an organism are used as a mixedcarbon source and energy, and ammonia nitrogen or nitrate nitrogen is used as a nitrogen source. The bacterium liquid, the dormancy cell and the immobilized strain of the sphingomonas can decompose ammonia nitrogen into nitrite nitrogen and simultaneously can decompose the ammonia nitrogen into nitrogen, can be used as denitrification microorganism for converting the ammonia nitrogen into the nitrite nitrogen and the nitrogen, thereby achieving the shortcut nitrification-denitrification. The strain can rapidly decompose the ammonia nitrogen and is suitable for treating the nitrogen-containingindustrial waste water and domestic sewage as well as polluted water source.
Owner:NANJING UNIV

Magnetic composite nano microsphere capable of emitting fluorescence and preparation thereof

The invention discloses a magnetic composite nano microsphere capable of emitting fluorescent light and a preparation method thereof, which belong to the inorganic nanophase material field. The preparation method comprises the following steps: firstly, the sol-gel method or the reversed phase microemulsion method is adopted for performing base catalysis on alkyl silicate, and a layer of silicon dioxide is uniformly coated on the surface of inorganic magnetic nano particles; secondly, an amino silane coupling agent is adopted for performing surface finish on silicone dioxide; thirdly, semiconductor quantum dots are absorbed on the surface of the silicone dioxide through the electrostatic action between an amino group and a carboxyl group on the surface of the amino silane coupling agent; and fourthly, the magnetic composite nano microsphere with a core-shell structure capable of emitting the fluorescent light is obtained. The preparation method has easy obtained raw materials and low cost. The composite nano microsphere obtained has good stability, controllable grain size, narrow distribution, and has good magnetic responsivity and performance of being capable of emitting the fluorescent light, and the two performances are controllable. The magnetic composite nano microsphere and the preparation method can be applied in the fields of biomedicine, bioengineering, etc. including immunoassay, biological labeling and separation, cell imaging and so on.
Owner:TONGJI UNIV

Programmed-release, nanostructured biological construct

A biologically engineered construct comprising of a polymeric biomatrix, designed with a nanophase texture, and a therapeutic agent for the purpose of tissue regeneration and / or controlled delivery of regenerative factors and therapeutic substances after it is implanted into tissues, vessels, or luminal structures within the body. The therapeutic agent may be a therapeutic substance or a biological agent, such as antibodies, ligands, or living cells. The nanophase construct is designed to maximize lumen size, promote tissue remodeling, and ultimately make the implant more biologically compatible. The nano-textured polymeric biomatrix may comprise one or more layers containing therapeutic substances and / or beneficial biological agents for the purpose of controlled, differential substance / drug delivery into the luminal and abluminal surfaces of the vessel or lumen, and the attraction of target molecules / cells that will regenerate functional tissue. The topographic and biocompatible features of this layered biological construct provides an optimal environment for tissue regeneration along with a programmed-release, drug delivery system to improve physiological tolerance of the implant, and to maximize the cellular survival, migration, and integration within the implanted tissues.
Owner:SCHAPIRA JAY N +1

Mixed Sugar Compositions

Novel mixtures of sugar amides or sugar amines are disclosed that have improved thermal properties over the individual components. New feedstocks based on both the surfactant tail as well as the sugar head group allow for improved physical properties of sugar amide surfactant mixtures and thus improved formulatability. Furthermore, new sources of unique methyl esters from both bioengineering and or co-metathesis of fats and oils provide novel and improved sugar amide surfactant mixtures.
Owner:THE PROCTER & GAMBLE COMPANY

Gene site-directed mutation vector as well as construction method and application thereof

The invention belongs to the technical field of bioengineering and in particular relates to a gene site-directed mutation vector as well as a construction method and application thereof. The invention provides the gene site-directed mutation vector due to lots of optimizations, cytosine deaminase is guided to be close to cytosine through a CRISPR (Clustered Regularly Interspaced Short Palindromic Repeats) system, the cytosine is changed into uracil, then uracil is changed into thymine through self-repair in plant cells, and finally, site-specific mutagenesis from C to T is realized in plants so as to generate resistance to herbicides. In addition, point mutation can be produced in a non-sgRNA targeted area, and novel herbicide-resistant great agronomic traits are brought.
Owner:CHINA AGRI UNIV

Methods and systems for designing machines including biologically-derived parts

A preferred embodiment of the present invention comprises computer-implemented methods for providing user assistance in biomachine design that, first, retrieve one or more digitally-represented candidate design items stored in a bioengineering knowledge base by translating requirements provided for a biomachine according to a bioengineering domain model into queries to the knowledge base for design items capable of implementing the biomachine according to the domain model; then second, construct one or more digitally-represented candidate biomachines from the candidate design items by arranging part information represented in the candidate design items according to a selected structure, and next evaluate the candidate biomachines according to bioengineering operability knowledge associated with the candidate design items, wherein operability knowledge associated with a design item specifies requirements for that item to inter-operate with other design items. The methods may backtrack. If at least one candidate biomachine has not been satisfactorily evaluated, the methods backtracking to one or more of these steps. The invention further encompasses variations of these methods, systems and program products performing these methods, data products including digital representations of design knowledge used by these methods, data products with digital representations of designed biomachines. Also encompassed are further steps of constructing or synthesizing biomachines along with the actual biomachines themselves.
Owner:ENGENEOS

Bacillus subtilis for efficient exogenous protein expression and high density culture

Belonging to the technical field of bioengineering, the invention discloses a bacillus subtilis for efficient exogenous protein expression and high density culture. According to the invention, a screening and separation method is employed to acquire a bacillus subtilis with high protein expression quantity, and the six genes srfC, spoIIAC, amyE, nprE, aprE and bamA are knocked out to obtain B. subtilis WS5 with a preservation number of CCTCC M 2016536. The bacillus subtilis WS5 is adopted as the expression host for construction of a beta-CGTase genetically engineered bacterium. The beta-CGTase genetically engineered bacterium is subjected to 3L fermentor culture, foams produced in the fermentation process are obviously decreased, a mirror does not detect spore production, almost no extracellular amylase and protease exist in the culture process, after 70h of fermentation culture, the beta-CGTase enzyme activity reaches 270U / ml, and DCW reaches 70g / L.
Owner:JIANGNAN UNIV

Method for biosynthesis of tyrosol in Escherichia coli and application of tyrosol

ActiveCN104099379ABacteriaMicroorganism based processesEscherichia coliPhenylacetaldehyde dehydrogenase
The invention relates to a method for biosynthesis of tyrosol in Escherichia coli and application of tyrosol, which belongs to the field of bioengineering technology. According to the method for biosynthesis of tyrosol in Escherichia coli, tyrosine or glucose is used as a substrate, (4-hydroxyphenyl)pyruvic acid is produced under the catalysis of ammonialyase coded by Escherichia coli; (4-hydroxyphenyl)acetaldehyde is produced under the action of the microzyme 4-hydroxyphenylpyruvate decarboxylase; (4-hydroxyphenyl)acetaldehyde is catalyzed by alcohol dehydrogenase so as to produce tyrosol; and a phenylacetaldehyde dehydrogenase gene of Escherichia coli is knocked out at the same time so as to block the transformation channel for (4-hydroxyphenyl)acetaldehyde into (4-hydroxyphenyl)acetic acid and promote accumulation of (4-hydroxyphenyl)acetaldehyde and transformation of (4-hydroxyphenyl)acetaldehyde into tyrosol. The invention provides a novel production approach for tyrosol; and the method lays a foundation for large-scale industrial production of tyrosol and has important economic values and social benefits.
Owner:TIANJIN INST OF IND BIOTECH CHINESE ACADEMY OF SCI

Method for extracting and salting organic acids out of fermentation liquor

The invention belongs to the technical field of bioengineering, and relates to a method for extracting and salting organic acids out of fermentation liquor. The method is characterized in that: soluble inorganic or organic salt solids or concentrated solution thereof and an extracting agent are added into the organic acid fermentation liquor, stirred for uniform mixing, and stood at room temperature for phase splitting; when two phases are formed by the salting-out and extraction, an upper phase is a solvent phase rich in the organic acids, while a lower phase is a salt phase rich in other components; if the extraction operation is directly performed without pretreating the fermentation liquor, a solid phase layer rich in bacteria and proteins is formed between the two phases; when three phases are formed, the upper phase is the solvent phase, a middle phase is the phase rich in the organic acids and the lower phase is the salt phase rich in the other components; therefore, the aim of extracting and separating the organic acids is fulfilled. The method solves the problems of difficulties in product separation, high cost and the like in the conventional process for separating the organic acids by a fermentation method, is simple, ensures separation time, low cost and high recovery rate, and is an organic acid separation method with industrial application prospect.
Owner:DALIAN UNIV OF TECH

Construction method of recombinant bacillus subtilis capable of generating hyaluronic acid with specific molecular weight

The invention discloses a construction method of recombinant bacillus subtilis capable of generating hyaluronic acid with specific molecular weight, belonging to the field of the bioengineering technology. According to the method, the production of hyaluronic acid is realized through integration of hyaluronic synthase (hasA) with streptococcus zooepidemicus source to bacillus subtilis; meanwhile, overexpression is realized on key genes of the synthetic route of HA, so that the high yield of bacillus subtilis is realized; on the basis, the hyaluronidase with the leech source is integrated to the genome of the bacillus subtilis, then mutant library construction is realized on ribosome bind sites (RBS) from the genetic expression translational level, and thus a series of mutants with different expression levels of hyaluronidases are obtained through high throughput screening; the yield of the hyaluronic acid achieves 19.38g / L, the molecular weight ranges from 103-106 Dalton, certain basis is laid for efficiently preparing micromolecule hyaluronic acids, and the construction method is suitable for industrial production and application.
Owner:JIANGNAN UNIV

Phase characteristic extraction method for brain waves of compound imaginary movements of lower limbs

The invention belongs to the field of bioengineering and computers, relating to a phase characteristic extraction method for brain waves of compound imaginary movements of lower limbs. The method comprises the following steps of: 1, collecting and preprocessing signals of brain waves of compound imaginary movements of lower limbs; 2, decomposing oscillation mode of brain waves of compound imaginary movements of lower limbs; 3, identifying characteristic oscillation mode; 4, extracting and identifying coordinate characteristic in functional areas; and 5, identifying mode identification. The method takes the unstability of the brain wave signals into consideration adequately, and has the maximum rate of identification of 87.8% which is obviously enhanced compared with 82.3% of the traditional method.
Owner:TIANJIN UNIV

Purification of biologically-produced 1,3-propanediol

A process for purifying 1,3-propanediol from the fermentation broth of a cultured E. coli that has been bioengineered to synthesize 1,3-propanediol from sugar is provided. The basic process entails filtration, ion exchange and distillation of the fermentation broth product stream, preferably including chemical reduction of the product during the distillation procedure. Also provided are highly purified compositions of 1,3-propanediol.
Owner:DUPONT IND BIOSCIENCES USA LLC +1

Biorefinery system, methods and compositions thereof

ActiveUS20140013658A1Efficiently and cost-effectively producingTaxing environmentFungiBacteriaBiofuelEngineering
The present disclosure relates to bioengineering approaches for producing biofuel and, in particular, to the use of a C1 metabolizing microorganism reactor system for converting C1 substrates, such as methane or methanol, into biomass and subsequently into biofuels, bioplastics, or the like.
Owner:CALYSTA

Blood vessel forming device and method for 3D bioprinting

This invention discloses a blood vessel forming device and method for 3D bioprinting. The device and method are used for the bioengineering technology and aim to solve the problems that currently, when blood vessels are printed through the 3D bioprinting technologies, the blood vessels are poor in forming quality and small in forming length. According to the method, biological ink is printed on rotary rods with the surfaces coated with thermo-sensitive hydrogel through the 3D bioprinting technologies, and the needed biological blood vessels can be formed through further biological culture. According to the method, the rotary rods with different diameters and lengths can be prepared for printing the biological blood vessels with different sizes, blood vessel tissue which is uniform in thickness and accurate in printing size can be fast printed, the available 3D printing technologies are diverse, and the device and method are wide in practicability. We call the method a 3D rotational forming printing method (3Denvelop Bioprinting Method).
Owner:周惠兴

Method for extracting effective components from natural products by adopting triple liquid phases

A method for extracting effective components from natural products by adopting triple liquid phases belongs to the technical field of bioengineering. The method is characterized by directly adding inorganic salt solutions, hydrophilic low-molecular organics and hydrophobic organics into ground natural products in proportion, or adding solid inorganic salts and hydrophobic organics into the extractof the hydrophilic low-molecular organics of the natural products in proportion, evenly stirring the mixture, carrying out standing or centrifuging on the mixture to form triple liquid phases; the effective components are enriched on the top phase, middle phase and bottom phase respectively based on different polarity and distributing partial protein, and polysaccharides and crude drug residue among phase interfaces to achieve the purpose of simultaneously extracting the effective components with different polarity from the natural products. The invention has the effects and benefits of developing an easily industrialized method for extracting and separating the effective components from the natural products, increasing the extraction efficiency, effectively combining the technologies ofextraction, separation and purification and being beneficial to reducing the production cost of the effective components from the natural products.
Owner:DALIAN UNIV OF TECH

Genetic engineering strain capable of effectively secreting D-psicose 3-epimerase and construction method and application thereof

The invention belongs to the technical field of bioengineering, and particularly relates to a genetic engineering strain capable of effectively secreting D-psicose 3-epimerase and a construction method thereof. A D-psicose 3-epimerase gene rdpe from rumen bacterium Ruminococcus sp. 5_1_39B_FAA is obtained firstly, recombinant plasmid pMA5-RDPE construction and bacillus subtilis conversion are conducted, and then constitutive and secretive expression of RDPE in bacillus subtilis is achieved. By comparing three glucose-induced promoters, the optimal inducible promoter P[xylA] is obtained, and the RDPE secretion level is increased remarkably. By knocking out the xylose utilization gene xylAB (xylA and xylB), the xylose metabolism pathway of bacillus subtilis is blocked, the secretion amount of RDPE is further increased, and the optimal induced concentration of the inducer xylose is reduced to 0.5% from 4.0%. Finally, the engineered strain 1A751SD-XR is evaluated in a 7.5 L fermentation tank, and the RDPE secretion level can be as high as 95 U / mL and 2.6 g / L.
Owner:TIANJIN INST OF IND BIOTECH CHINESE ACADEMY OF SCI

Method for preparing phosphatidylserine abundant in polyunsaturated fatty acid

The invention relates to a method for preparing phosphatidylserine abundant in polyunsaturated fatty acid and belongs to the technical field of bioengineering. The method is characterized by comprising the following steps of: firstly, catalyzing ester exchange reaction between phosphatide and polyunsaturated fatty acid ester by utilizing one or a mixture of phosphatidase A and lipase to generate phosphatide abundant in polyunsaturated fatty acid; and then catalyzing phosphor-transfer esterification reaction between the phosphatide abundant in the polyunsaturated fatty acid and L-serine by utilizing phosphatidase D to generate the phosphatidylserine abundant in the polyunsaturated fatty acid. The method has the advantages of no discharge of waste water, good product quality, no solvent residue, safe process operation, few reaction byproducts, no waste generation, cost reduction, simple production process and easy realization of scale production because of utilizing two enzymes to perform sub-step catalysis and perform reaction in the same reactor, and completing the reaction process in a non-solvent system. Therefore, the invention provides a good and feasible method for preparing the phosphatidylserine abundant in the polyunsaturated fatty acid.
Owner:DALIAN UNIV OF TECH

Macroreticular polyvinyl alcohol bead carrier and preparation thereof

The invention provides a method for preparing a macroporous reticulated polyvinyl alcohol spherical vector. The method comprises the following steps: firstly, polyvinyl alcohol, calcium carbonate, sodium alginate and water are mixed in a certain mass proportion, and stirring is performed for full dissolution of the polyvinyl alcohol and uniform mixture, and then white PVA sol is obtained; secondly, the sol obtained is added into saturated boric acid solution containing 3 percent of calcium chloride by a peristaltic pump, and PVA gel beads are formed, cleaned by water and then placed into diluted hydrochloric acid solution for dipping until no air bubble is generated; thirdly, a spherical vector is thrown into glutaral pentanedial water solution and adjusted into acidity so as to generate crosslinking reaction to form a more stable crosslinking structure; and fourthly, the spherical vector is dipped into water and cleaned into neutrality, and then the white macroporous reticulated PVA spherical vector with elasticity is obtained. The macroporous reticulated polyvinyl alcohol vector prepared by the method has stable macroporous reticulated structure and good hydrophilicity, physical and chemical stability and anti-biological degradability, is suitable for immobilized enzymes and microorganisms so as to form a plurality of bed-shaped bioreactors, and is used in the modern bioengineering field such as sewage treatment and so on.
Owner:LANZHOU UNIVERSITY

Bioengineering lacquer putty as well as preparation method and use thereof

The invention discloses a bioengineering lacquer putty as well as preparation method and use thereof. The bioengineering lacquer putty comprises: talcum powder, heavy calcium carbonate, emiaste, hydroxypropylmethylcellulose, adhesive, calcium stearate, tourmaline powder and bergmeal. the bioengineering lacquer putty of the invention has the sterilizing and deodorizing function, can automatically remove the harmful gas such as methyl aldehyde and the like, has no pollution, and ensure the safety of the human body and the animals and plants. The bioengineering lacquer putty of the invention has higher production amount of the negative ion and far infrared emissing ability, can prevent the electromagnetic radiation, can rapidly absorb and remove the abnormal flavour generated by the paint, the colloid and the like, absorb the smoke flavor for a long time, and has definite treating efficacy for the limbs ice-cold disease, shoulder pain, lumbago, physical pain, neuralgia and the like.
Owner:陈耕 +1

Composite microecological preparation and preparation method thereof

ActiveCN105462872AGood cooperation and symbiosisImprove immune activityFungiBacteriaBiotechnologyStaphylococcus lactis
The invention provides a composite active bacterial preparation which is used for aquatic products and has the water improving and fertilizing functions and a preparation method thereof by applying a modern bioengineering technology mainly for the problem that in existing aquaculture, the water quality of a pond is poor. The composite microecological preparation is prepared by mixing bacillus subtilis, bacillus megatherium, bacillus amyloliquefaciens, bacillus licheniformis, enterococcus faecium, lactobacillus brevis, lactobacillus plantarum, lactococcus lactis and saccharomyces cerevisiae through liquid-submerged fermentation. In the liquid preparation, microorganisms are in a dormant state and are stable and easy to preserve, after the preparation is put into water, the dormant strains can quickly resuscitate, harmful substances such as nitrite nitrogen and ammonia nitrogen in the water are quickly decomposed, good algae growth is facilitated, harmful algae reproduction is inhibited, and therefore the purpose of improving the water quality of the culture water is achieved.
Owner:BEIJING DABEINONG TECH GRP CO LTD +2

Method and strain for producing tetramethylpyrazine

The invention discloses a method and a strain for producing tetramethylpyrazine (TTMP), in particular a two-step production process that a microorganism accumulates precursor acetoin by using the fermentation of reducing sugar and the acetoin and ammonia undergo a non-enzymatic reaction to synthesize the TTMP, and belongs to the technical field of bioengineering. The microorganism is any one of bacillus subtilis (CCTCC NO:M 208157), bacillus licheniformis (CGMCC NO:3961), bacillus licheniformis (CGMCC NO:3962) and bacillus licheniformis (CGMCC NO:3963). The strain obtains biomass and accumulates endogenous precursor acetoin by using the fermentation of the reducing sugar, and the acetoin and the ammonia in a fermentation system undergo the non-enzymatic reaction to synthesize the TTMP. The method has the advantages that: the obtained bacteria quantity is higher, the accumulation amount of the acetoin is effectively improved (38 to 44g / L); the high-concentration endogenous precursor acetoin and the ammonia can quickly react under proper conditions to form the TTMP (16 to 20g / L); and the use ratio (40.3 percent) of precursors is obviously improved due to the accumulation of endogenous acetoin and an in-situ fermentation environment.
Owner:JIANGNAN UNIV

Preparation method and application of microbial agent composition for enhancing secondary fermentation of bean paste

The invention relates to the field of bioengineering, in particular to a preparation method and an application of a microbial agent composition for enhancing secondary fermentation of a bean paste. The microbial agent composition consists of a saccharomycetes agent, an aspergillus oryzae agent and a pleospora agent; and the three microbial agents are prepared, and then the prepared microbial agents are mixed with the secondary-fermented bean paste, so as to promote the secondary fermentation of the bean paste. The whole process of the preparation method of the microbial agent composition provided by the invention is applicable to continuous industrial production; by-products (chili and radix platycodonis), from the production of Pixian bean paste, are comprehensively utilized; a production cycle can be shortened by 6 months, the content of amino nitrogen can be improved by 20% and the content of volatile aroma-producing components can be improved by more than 3 times (the contents of total ester, total acid and total aldehyde); by inoculating aflatoxin B1 with the saccharomycetes agent at a production peak (after being fermented for 30-60 days), an ester producing and aroma generating process can be enhanced, the metabolism of aspergillus flavus and partial aspergillus parasiticus can be competitively inhibited and the content of the aflatoxin B1 can be reduced, and the content of the aflatoxin B1 is lower than 0.5ppm, so that food safety is enhanced.
Owner:XIHUA UNIV

Method for producing Anrodia camphorata mycelia based on solid-state surface culture

InactiveCN101822170AFast and vigorous growthFirmly attachedHorticultureBULK ACTIVE INGREDIENTMoisture
The invention discloses a method for producing Anrodia camphorata mycelia based on solid-state surface culture, and belongs to the field of bioengineering. The method comprises the following steps of: screening components of a culture medium of the Anrodia camphorate and optimizing the proportion of the cereal raw material in the culture medium so that the culture medium is firmly adsorbed to the inner wall of a culture vessel or the culture surface to bring convenience to the surface culture of the Anrodia camphorata mycelia; inoculating the Anrodia camphorata mycelia in the culture surface of a reactor and culturing the Anrodia camphorata mycelia in the environment of certain temperature and moisture; feeding the culture medium every a certain time in batch during the surface culture so as to timely replenish the nutrient components required by the growth of the Anrodia camphorata mycelia and making the growth environment of the Anrodia camphorata mycelia close to the natural culture environment until a large amount of mycelia or large colony is formed; and quickly drying the Anrodia camphorata culture at a low temperature after the culture. The method of the invention makes the growth environment of the Anrodia camphorata mycelia close to that of the wild Anrodia camphorate and improves the productivity of the Anrodia camphorata culture by timely feeding the culture medium in batch, so that the obtained Anrodia camphorata culture has high content of active ingredient and closer efficacy to the wild fruit body.
Owner:JIANGNAN UNIV

SARS vaccine of adenovirus carrier and preparation method, application of coronavirus S gene

The invention pertains to biological genetic engineering field, specificly relating to SARS vaccine of adenovirus carrier and preparation method, application of related coronavirus S gene in preparation of the SARS vaccine for preventing SARS. Through a bioengineering means, the related coronary virus S gene and a defective adenovirus are recombined, which makes protective immunogen protein or polypeptide expressing in it. A genic vaccine that can arouse the mucosal immunogenicity is produced through amplifying training, purification, and preparation, which induces a immunity reaction in the respiratory mucosa, makes the organism produce the corresponding antibody, and prevents virus from infection. Compared with the traditional inactivated viral particles vaccine, the invention has a high safety; it is convenient to operate; it is not limited by the specific conditions such as intramuscular injection; and it has an extensive clinical application prospect.
Owner:SUN YAT SEN UNIV CANCER CENT

Method for in-vitro induction of cholangiocyte-like transformation of primary hepatocytes and for long-term culture, amplification and differentiation and application of method

ActiveCN106754636AStable proliferationSolve problems that cannot be cultivated for a long timeVertebrate cellsArtificial cell constructsIn vitro transformationHepatica
The invention relates to the field of bioengineering technology, and in particular to a method for in-vitro induction of cholangiocyte-like transformation of primary hepatocytes and for long-term culture, amplification and differentiation and an application of the method. The invention provides a hepatocyte cholangiocyte-like transformation medium determined by chemical ingredients and / or a system which is composed of a hepatocyte mature medium and is applicable to long-term stable culture, amplification and differentiation of the primary hepatocytes; the invention also provides the method for in-vitro induction of cholangiocyte-like transformation of the primary hepatocytes and for long-term culture, amplification and differentiation; and with the application of the method, the cholangiocyte-like hepatocyte conversion of the primary hepatocytes can be induced in vitro, so that the obtained hepatocytes have characteristics of biliary epithelial cells and hepatic precursor cells, and the hepatocytes are applicable to long-term stable culture and amplification. The breedable cholangiocyte-like hepatocytes and hepatocytes, which are mature in differentiation, prepared by the invention are applicable to such aspects as toxicologic and pharmacological evaluation of compounds and drugs, researches and diagnosis & treatment of hepatitis viruses, treatment by hepatocyte transplantation, preparation of bioartificial liver and the like.
Owner:SECOND MILITARY MEDICAL UNIV OF THE PEOPLES LIBERATION ARMY

Gene drive carrier and construction method thereof

InactiveCN108707620AAvoid getting againElimination of the methicillin resistance geneVector-based foreign material introductionResistant genesCarrier system
The invention belongs to the field of bioengineering and particularly relates to a Gene drive carrier and a construction method thereof. The construction method includes the steps of 1), artificiallysynthesizing a cap5A promoter and an sgRNA fragment; 2), amplifying a cas9 gene; 3), amplifying a plasmid skeleton; 4), amplifying an rpsL promoter; 5), assembling an empty carrier; 6), inserting a spacer targeted at the formula described; 7), constructing the carrier. In the method, a novel chromosome box recombinase CcrC2 and CRISPR-Cas9 technology are combined in an attempting manner, an SCCmeckiller carrier system, namely the Gene driver carrier is constructed, the Gene drive acts on methicillin-resistant staphylococcus aureus MRSA, staphylococcal chromosome box SCCmec is targeted to remove from the methicillin-resistant staphylococcus aureus MRSA, and methicillin-resistant genes are thereby eliminated.
Owner:NORTHWEST A & F UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products