68 results about "Cadaverine" patented technology

Cadaverine dicarboxylate is produced by performing an enzymatic decarboxylation reaction of a lysine solution while adding a dicarboxylic acid containing 4 to 10 carbons to the lysine solution to maintain pH of the solution at a level sufficient for the enzymatic decarboxylation reaction to occur, for example, 4.0 to 8.0.

The present invention relates to a customized synthesized sRNA for reducing gene expression in a prokaryotic cell having a new structure, to a method for preparing the synthesized sRNA and to a use of the synthesized sRNA. More particularly, the present invention relates to a synthesized sRNA which contains an Hfg binding site derived from any one sRNA of MicC, SgrS and MicF, and a zone for forming complementary binding with target gene mRNA. The present invention also relates to a method for preparing the synthesized sRNA and to a use of the synthesized sRNA.; The synthesized sRNA according to the present invention has the advantages of regulating the degree of inhibition by regulating the binding force to mRNA of the target gene, and can be effectively produced without deleting an existing gene through synthesized sRNA for regulating gene expression and may reduce an expression of the target gene, thus enabling the synthesized sRNA of the present invention to be valuably used in the production of recombinant microorganisms. The synthesized sRNA of the present invention may be quickly applied to various strains, and therefore, is very suitable for measuring the metabolizability of each strain and selecting an optimum strain.; In addition, recombinant microorganisms for producing tyrosine or cadaverine at a high efficiency according to the present invention, obtained by regulating metabolic flux of microorganisms by means of synthesized sRNA can be valuably used as microorganisms for drugs and industrial solvents. That is, selecting an expression inhibitory target gene for high efficiency production of metabolites can be easily performed using the sRNA of the present invention. Thus, the sRNA of the present invention can be used in producing recombinant strains for the efficient production of various metabolites and in establishing methods for producing efficient production, and thus is very useful.

Cadaverine dicarboxylate is produced by performing an enzymatic decarboxylation reaction of a lysine solution while adding a dicarboxylic acid containing 4 to 10 carbons to the lysine solution to maintain pH of the solution at a level sufficient for the enzymatic decarboxylation reaction to occur, for example, 4.0 to 8.0.

The invention provides a method for attracting wild hermetia illucens. The method includes the following specific steps of breeding housefly larvae, and then attracting the wild hermetia illucens outdoors by using residual breeding materials on clear and rainless days at the temperature of 23 DEG C to 35 DEG C from April to October. By means of the method, the effect of attracting the hermetia illucens is very significant, in particular, the composts used for breeding the housefly larvae are rich in lysine which can be extremely easily decomposed into cadaverine and other substances with pungent smells under the action of the housefly larvae and natural microbes, and cadaverine and other substances with pungent smells have an extremely strong attracting effect on the wild hermetia illucens adults. After the egg-laying and development of the hermetia illucens are finished, a large number of hermetia illucens provenances can be obtained easily in a short time. The method is simple, convenient to conduct and efficient, and can greatly save labor and time for obtaining the wild hermetia illucens provenances.

A diagnostic test kit for simultaneously detecting the presence of amines (e.g., putrescine, cadaverine, tyramine, and trimethylamine) and C-reactive protein in a vaginal sample is provided. The test kit includes a lateral flow assay device containing a chromatographic medium (e.g., porous membrane, fluidic channel, etc.). The chromatographic medium defines a first detection zone within which is contained an amine-sensitive chromogen and a second detection zone within which is contained an immunoreactive receptive material that preferentially binds with C-reactive protein or a specific binding member thereof. The first and second detection zones may produce signals that are detectable, either visually or through the use of instrumentation. In this manner, the kit provides a complimentary system for both predicting and identifying the onset of premature membrane rupture. For example, the detection of amines in the vaginal sample may serve as a diagnosis of bacterial vaginosis, which may provide an early warning of the potential for premature membrane rupture. The complimentary detection of CRP may serve as an indicator of rupture and thus alert the patient to seek immediate medical care. Such a system may be equally effective in point of care (POC) and over-the-counter (OTC) applications.

An enzyme based nondestructive sensor for the qualitative detection of spoilage in seafood is provided wherein the sensor does not alter the physical composition of the seafood specimen. The sensor comprises a sampling matrix, at least three or more enzymes in contact with the sampling matrix, and at least one indicator compound in contact with the sampling matrix. The enzymes are capable of interacting with four target chemicals comprising putrescine, cadaverine, histamine and tyramine, which are located on the surface of the seafood specimen. The indicator compound is capable of changing the color of the sampling matrix thereby indicating a qualitative visually detectable color change. A method for the nondestructive detection of the quality of a seafood specimen at any given time and for determining the remaining usable shelf life of the seafood specimen is disclosed.

The invention provides a method for breeding Boettcherisca peregrine maggots and trapping wild black soldier flies. The method specifically comprises the steps of breeding the Boettcherisca peregrine maggots by utilizing bran and albuminoidal substances rich in lysine and then trapping the wild black soldier flies by utilizing breeding remaining materials. The effect of trapping the wild black soldier flies is quite obvious, especially the rich lysine in the breeding materials is easily decomposed into substances with strong stimulating smells like pentamethylene diamine under the action of the Boettcherisca peregrine maggots and natural microorganisms, the substances with the strong stimulating smells have the strong effect on inducing wild black soldier fly adults to spawn, wild black soldier fly eggs are hatched and grow under the constant temperature, and therefore a large number of black soldier fly provenances can be obtained in the short time. The method is simple, convenient, effective and capable of greatly saving manual work and time of obtaining the black soldier fly provenances.

To improve problems of the content of trifunctional and higher organic compounds, fish-eyes of a film and its flowability in injection molding occurring in the existing techniques, the total content of trifunctional and higher organic compounds of cadaverine salts is regulated to 90 ppm or less. To improve the fish-eyes (F / E) of a polyamide resin film and its flowability in injection molding and the amount of high-molecule impurities contained in the polyamide resin, an aqueous cadaverine salt solution, from which high-molecule impurities having a molecular weight of 12,000 or more have been removed, is prepared. To easily and economically produce a cadaverine solution by which defects in the surface appearance such as fish-eyes can be prevented in the case of using it as a starting material of a polyamide resin film or the like, moreover, the amount of microbial cells employed in the reaction is regulated within a definite range.

The present invention is directed to a method utilizing a microorganism with reduced isocitrate dehydrogenase activity for the production of fine chemicals. Said fine chemicals may be amino acids, monomers for polymer synthesis, sugars, lipids, oils, fatty acids or vitamins and are preferably amino acids of the aspartate family, especially methionine or lysine, or derivatives of said amino acids, especially cadaverine. Furthermore, the present invention relates to a recombinant microorganism having a reduced isocitrate dehydrogenase activity in comparison to the initial microorganism and the use of such microorganisms in producing fine chemicals such as aspartate family amino acids and their derivatives.

The present invention relates to a method for the purification of cadaverine from an aqueous cadaverine salt composition comprising one or more involatile impurities, the method comprising: (1) mixing the aqueous cadaverine salt composition with one or more bases selected from the group consisting of Ca(OH)2, Mg(OH)2, CaO and MgO to provide an aqueous cadaverine composition; and (2) distilling or evaporating the aqueous cadaverine composition to produce purified cadaverine; wherein one or more solvents are added to the evaporation / distillation system before the evaporation / distillation stops, and the one or more solvents comprise at least one or more high boiling point (HBP) solvents.

The invention discloses a method for utilizing an ultra-effective bonded phase chromatography to serially connect QDa while quickly detecting seven biogenic amines in white spirit and belongs to the technical field of detection. The method is characterized by the following steps: after extracting a to-be-detected wine sample with acetonitrile, taking BEH C18 bonded phase chromatographic column as a separating column and carbon dioxide (A)+ isopropanol (B) as flowing phase for performing gradient eluting, and adopting a QDa mass spectrometry detector for detecting after separating the sample through the ultra-effective bonded phase chromatography (UPC2). The method provided by the invention is simple, quick, accurate, reliable and applicable to the simultaneous detection for the contents of seven biogenic amines (histamine, putrescine, cadaverine, phenylethylamine, spermidine, tyramine and octopamine) in white spirit.