68results about How to "Simple fermentation conditions" patented technology

The invention discloses a purpose of lignin degrading bacterium, and particularly relates to a method for synthesizing a biological plastic precursor-polyhydroxyalkanoate by utilizing lignin degrading bacterium (Cupriavidus basilensis B-8) with a collection number of CGMCC (China General Microbiological Culture Collection Center) No. 4240. A bacterial strain can grow by utilizing lignin (the lignin concentration of a growth medium is 1g/L to 6g/L) which is not subjected to pretreatment as a unique carbon source, and is used for synthesizing a homopolymer of biological plastic-polyhydroxyalkanoate in the condition (the concentration of nitrogen is less than 60mg/L) that a nitrogen source is short. By using a culture and a production method which are provided by the invention, the carbon source and the pretreatment cost of the carbon source are greatly decreased; the method has large-scale production and industrialization potential.

The invention discloses a huperzia serrate endophytic fungus which is obtained from a pteridophyte, namely, a huperzia serrate plant by adopting a separating and purifying technology, is named Ceriporia lacerate HS-ZJUT-C13A and is collected in the China Center for Type Culture Collection on October 28, 2012 with the collection number CCTCC M 2012433. The strain provided by the invention can be used for preparing a compound, namely, 8alpha, 15alpha-epoxydized huperzine A with a nerve protection effect. A conversion method has the advantages of simple fermentation conditions, high substrate conversion rate and the like, is easily cultures the strain, has the potential of industrial large-scale production, is a novel way for obtaining the compound, protects valuable and rare medicinal huperziaceae plant resources from being damaged and can provide a novel thought for reliving the current situation of lack of huperzine A in clinical administration.

The invention discloses an aspergillus fumigatus which can produce podophyllotoxin, epipodophyllotoxin biglucoside and astragaloside, and application thereof. The aspergillus fumigatus TEQA CGMCC No. 3115 has the function of producing podophyllotoxin, epipodophyllotoxin biglucoside and flavonoids astragaloside which have the physiological property the same as that of Chinese podophyllum root. The aspergillus fumigatus can be used for preparing podophyllotoxin and astragaloside. The method for preparing podophyllotoxin, epipodophyllotoxin biglucoside and astragaloside has the advantages of simple fermentation conditions, easy bacterium culture and short production period, with potential application for industrialized mass production. Besides, the aspergillus fumigatus provides a new way for resource development of podophyllotoxin and has important meaning to protect ecological diversity of plants.

The invention discloses a brewer's yeast engineering bacterium producing 2-phenylethyl alcohol, a preparation method and applications thereof. The invention discloses a preparation method of a brewer's yeast engineering bacterium producing 2-phenylethyl alcohol. According to the preparation method, an encoding gene of GATA transcription factor Gln3p is introduced into an acceptor (brewer's yeast) to obtain the brewer's yeast engineering bacterium producing 2-phenylethyl alcohol. Compared with the host bacterium, the substrate conversion rate and cell's 2-phenylethyl alcohol synthesizing performance of brewer's yeast engineering bacterium are prominently improved; moreover, the fermentation conditions of the engineering bacterium are simple, the fermentation period is short, and the engineering bacterium can be applied to industrial production of 2-phenylethyl alcohol.

The invention belongs to preparation of a new gene and construction of an engineering bacterium, and particularly relates to a neutral proteinase gene constructed by a molecular chaperone prsA, a protein, bacillus subtilis, preparation and an application. The molecular chaperone PrsA and the neutral proteinase gene are integrated to construct pHT43-npr-PrsA recombinant plasmid by a molecular biology technology and finally converted into a host bacterium, namely the bacillus subtilis WB800N, to construct a new bacillus subtilis engineering bacterium CGMCC No. (China General Microbiological Culture Collection Center number) 14837; the molecular chaperone PrsA and the neutral proteinase gene are co-expressed; and an expression level of neutral proteinase is effectively increased.

The invention relates to the technical field of functional microorganism screening and application, and particularly provides a novel bacillus coagulans and application of thereof. The bacillus coagulans is screened from a sour cabbage sample, the preservation number is CCTCC NO: M2019738, and the bacillus coagulans has high oxidation resistance and cholesterol degradation capacity, can effectively regulate intestinal tract movement, prevent diarrhea, recover the microbial barrier function of intestinal tracts and shorten the disease course, and is very remarkable in effect.

The invention provides bacteria for degrading cellulose and microbial inoculum prepared by same, which both belong to the bio-technology field. YN1 microbial strain is added to a PDA plating culture medium, PDA liquid culture medium, a seed tank culture medium and a production culture medium, and the effectively live bacteria of the microbial strain reaches over 100 million/ml. After the YN1 bacterial strain is cultivated through fermentation, the activity of incision enzyme, excision enzyme, beta-glycosidase, xylanase and cellulase is respectively 95.7 U/mL, 14.6 U/mL, 20.5 U/mL, 71.6 U/mL and 26.6 U/mL. After the YN1 bacterial strain is cultivated through solid fermentation, the activity of incision enzyme, excision enzyme, beta-glycosidase, xylanase and cellulase is respectively 1192.2 U/g, 100.6 U/g, 136.9 U/g, 1118.0 U/g and 210.7 U/g. The YN1 microbial strain can degrade 41.87% straws and 31. 59% rice husks in 7 days.

The invention discloses a huperzia serrata endophytic fungus which is obtained by separation from a stem part of a living body of a pteridophyte huperzia serrata plant and classified and named as peyronellaea glomerata HS-ZJUT-XW12, wherein the strain is collected in China Center for Type Culture Collection (CCTCC) on the collection date of October 28, 2012 with the collection number of CCTCC NO: M 2012434. The strain provided by the invention is found by inventors after years of creative experimental labor, and the strain is firstly used for fermentation and culture so as to prepare a compound FPBA with liver-protecting activity; the preparation method has the advantages of simple fermentation conditions, easiness in culture of the strain, few process steps, short production period and the like, and further has potential for realizing industrial large-scale production; a new way is provided for seeking sources for developing pyrrole type liver-protecting medicines, and the shortage of clinical medicines can be alleviated to a certain extent.

The invention discloses a batch fermentation method of 2'-fucosyllactose. The method is more suitable for large-scale fermentation on the original basis, is higher in production efficiency and final yield, is easier for industrial enlarged culture, and has higher application prospect and economic value. A fermentation medium used in the method is simple in component, free of toxic and harmful components, economical, cheap and easy to obtain, and an excellent fermentation effect and high 2'- fucosyllactose yield can be obtained.

The invention relates to the technical field of microbial fermentation, in particular to a method for fermenting vegetable soybeans and other foreign products by bacillus natto to produce nattokinase.The method comprises the steps of inoculating 2% of prepared bacillus natto solution into selected, cleaned, steamed and sterilized vegetable soybeans and other foreign products; carrying out fermentation in a constant-temperature incubator of 37 DEG C for 36 hours; carrying out after-ripening for 18 hours; carrying out salting-in and centrifuging to obtain an original extracting solution; carrying out ammonium sulfate precipitation and preliminary purification to obtain a crude enzyme solution; and then carrying out further purification by using DEAE ion-exchange column chromatography. The invention aims to provide a new idea for producing the nattokinase through fermentation and to provide a scheme for solving the problem of processing the foreign products of a company. The activity ofthe nattokinase produced under an optimum fermentation process can reach 2326.60 IU/g; an SDS-PAGE electrophoresis test verifies that the molecular weight of the extracted nattokinase is 25-35 kDa, and the recovery rate and the purification multiple are 4.9% and 11.2 separately; and a theoretical basis is provided for production of the nattokinase and follow-up in vivo tests.

The invention discloses a fermentation culture medium for high-yield production of fatty acids through Thraustochytrids, and applications thereof. The preparation method of the fermentation culture medium comprises: weighing 45-65 g of glycerol, 1-2 g of peptone, 0.5-1.5 g of a yeast extract, 0.2-0.3 g of potassium dihydrogen phosphate and 25-40 g of artificial sea salt according to a certain ratio, adding ultrapure water to achieve a volume of 1000 ml, uniformly stirring, sterilizing for 21 min at a temperature of 115 DEG C, and cooling to a room temperature to obtain the product. According to the present invention, the production cost is saved by using the glycerol; compared to the original culture medium, the fermentation culture medium of the present invention has the significantly-increased total fatty acid yield, the significantly-increased saturated fatty acid yield and the significantly-increased DHA content, and improves the utilization rate of the raw material; and the fermentation culture medium has characteristics of simple fermentation condition, convenient operation, low production cost, easy large-scale fermentation and energy saving.