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47 results about "Geosmin" patented technology
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Geosmin is an organic compound with a distinct earthy flavor and aroma produced by certain bacteria, and is responsible for the earthy taste of beetroots and a contributor to the strong scent (petrichor) that occurs in the air when rain falls after a dry spell of weather or when soil is disturbed.
System and method for removing natural organic substances and odor-induced substances in micro polluted water
InactiveCN102092899AEfficient removalReduce generationMultistage water/sewage treatmentFiltration membraneNatural organic matter
The invention discloses a system and a method for removing natural organic substances and odor-induced substances in micro polluted water, which belong to the fields of water treatment processes and equipment. The system comprises an aeration biological filter tower, an ultra-filtration membrane assembly and a regulating tank, wherein the bottom of the aeration biological filter tower is connected with the bottom of the regulating tank through a pipeline; the regulating tank is provided with two water outlet passages, namely a direct water outlet passage of the regulating tank and a water passage for connecting the regulating tank and the ultra-filtration membrane assembly; the water outlet of the ultra-filtration membrane assembly is connected with the water inlet of a clean water tank through a water outlet pump. The invention also discloses the method for removing the natural organic substances and the odor-induced substances in the micro polluted water by using the system. The treatment process can simultaneously remove the natural organic substances and 2-methyl isoborneol and geosmin serving as the odor-induced substances in the water, the quality of the discharged water is good, the adding amount of a disinfectant is obviously reduced, and the generation of disinfection byproducts is reduced.
Owner:TSINGHUA UNIV
Method for determining eight kinds of odorous substances in water simultaneously
InactiveCN102253156AHigh degree of automationReduce detection efficiencyComponent separationPyrazineWater quality
The invention belongs to the technical field of natural environment water quality monitoring and discloses a method for determining eight kinds of common odorous substances in water simultaneously through use of a method of combining purge-and-trap and gas chromatography / mass spectrometry. The method can be adopted to determine eight kinds of common odorous substances such as dimethyl sulfide (DMS), dimethyl trisulfide (DMTS), 2-isopropyl-3-methoxy pyrazine (IPMP), 2-isobutyl-3-methoxy pyrazine (IBMP), 2-methyl isobornyl (MIB), beta-cyclocitral, geosmin (GSM) and beta-ionone in water simultaneously. Any report on the method for determining the eight kinds of substances in one step is not present yet. The method disclosed by the invention fills the gap and can be used for quantitatively analyzing the eight kinds of odorous substances in water in one step, so that the detection efficiency is greatly increased.
Owner:INST OF AQUATIC LIFE ACAD SINICA
Method for determining earthy-smell substances in fish flesh
PendingCN110940766AMeet testing needsAvoid askingComponent separationGas liquid chromatographicSolid-phase microextraction
The invention discloses a method for determining earthy-smell substances in fish flesh, which comprises the following steps: taking fish flesh prepared by taking a cis-decahydro-1-naphthol solution asan internal standard as a sample, extracting geosmin and 2-methylisoborneol in the sample by adopting a headspace solid-phase microextraction method, and performing a determination process by adopting a gas chromatography-mass spectrometry method. A headspace solid-phase microextraction method is adopted to extract earthy-smell substances in the fish flesh, cis-decahydro-1-naphthol is taken as aninternal standard, and qualitative and quantitative determination is carried out by a gas chromatography-mass spectrometry method, so that the detection method of the geosmin and the 2-methylisoborneol in the fish flesh is established, and a detection method basis is provided for removing peculiar-smell substances in cultured aquatic products.
Owner:四川威尔检测技术股份有限公司 +1
GC-MS method for measuring volatile characteristic organic matters in water based on multifunctional on-line sample introduction
InactiveCN110161150ANo pollution in the processEasy to operateComponent separationWater basedPretreatment method
The invention discloses a GC-MS method for measuring volatile characteristic organic matters in water based on multifunctional on-line sample introduction. According to the method, two kinds of onlinepretreatment methods of headspace and dynamic headspace of benzene series (benzene, methylbenzene, ethylbenzene, p-xylene, m-xylene, o-xylene, isopropyl benzene, chlorobenzene and styrene) are established; two kinds of online pretreatment methods of a solid-phase micro-extraction method and a magnetic stirring adsorption extraction method of two kinds of odor substances (geosmin and dimethyl isocamphitol), and four kinds of a formula which is as shown in the specification are established; and then online sample introduction GC-MS detection is carried out. The detection result shows that the detection limit, the recovery rate, the precision and the like of the on-line method for detecting the volatile organic matters in the three categories can meet the measurement requirements; the onlinedetermination efficiency is improved by one half to two thirds, and the method is simple, convenient, environment-friendly and efficient. According to the method, the sample detection sensitivity iseffectively improved by adding the aid and a secondary adsorption mode, and meanwhile, the traditional thermal desorption sample introduction mode is changed, and the accuracy and operability of sample detection are both optimized.
Owner:SHANDONG WATER & WASTEWATER MONITORING CENT
Method for determining geosmin and 2-methylisoborneol in sediments
PendingCN112014485AQuantitatively accurateMeet testing needsComponent separationPhysical chemistryMass Spectrometry-Mass Spectrometry
The invention aims at overcoming the defects of the existing sample detection technology, and particularly relates to a method for determining geosmin and 2-methylisoborneol in sediments, which comprises the following steps of sampling, headspace solid phase micro-extraction and GC-MS analysis. According to the method, the extraction effects of different types of extraction heads are compared, theextraction conditions such as the extraction time, the extraction temperature and the like are optimized, the headspace solid phase micro-extraction / gas chromatography / mass spectrometry method is established to simultaneously determine the geosmin and the 2-methylisoborneol in the sediment, and the method has characteristics of sensitivity, rapidness, environmental protection and the like, can accurately quantify the odor substances in the sediment, and can meet the detection requirements of the actual sample.
Owner:苏州见远检测技术有限公司
Bacillus amyloliquefaciens and application thereof in control over geosmin smell in white spirit
ActiveCN104073453AReduce the concentration of geosminReduced Streptomyces levelsBacteriaAlcoholic beverage preparationYeastBacillus amyloliquefaciens
The invention discloses a novel bacillus amyloliquefaciens, wherein a bacillus amyloliquefaciens is separated from high-temperature white spirit brewing yeast, and collected in the China Centre for Type Culture Collection (CCTCC) on August 12, 2013, and the collection number is CCTCC NO: M2013368; and the generation of geosmin smell in white spirit can be controlled by adding a certain amount of bacillus amyloliquefaciens during the white spirit brewing process. The strain is capable of synthesising active substances such as antimicrobial lipopeptides, suppressing the growth of geosmin-generating streptomycete and the synthesis of geosmin during the white spirit brewing process, and fundamentally controlling the geosmin smell in white spirits of a highly flavoured type, a faint flavour type, a soy sauce flavour type and the like.
Owner:JIANGNAN UNIV
Strain for generating geosmin and screening method thereof
InactiveCN102181392ASolve problems with geosmin sourcesBacteriaMicrobiological testing/measurementScreening methodBio engineering
The invention discloses a strain for generating geosmin and a screening method thereof, belonging to the technical field of biological engineering. The invention discloses a method for screening and identifying relevant strains of aromatic substances generated by microbial metabolism in white wine in a yeast preparing process by combining a smelling means and taking flavor as guidance. By adopting the method, four strains for generating geosmin are obtained by screening in yeast produced in a faint scent white wine factory, and are respectively named as LBG-FXJ, FJ-HX, QC-1 and QC-2; the four strains are streptomyces according to the comparision result of bacterial colony, cell morphology and physiological biochemical features as well as a 16SrRNA gene sequence; a large amount of geosmin substances can be accumulated by the four strains in a patato-glucose culture medium, thus solving the problem of the source of the geosmin substances in the faint scent white wine; the four strains of streptomyces obtained by screening can be used as mode-type bacteria; and the method is used for detecting the strain for generating the geosmin during white wine production and researching the generated mechanism.
Owner:JIANGNAN UNIV
Lysobacter and application thereof
InactiveCN108220188ABiologically activeHigh economic valueAntibacterial agentsTobacco preparationBenzaldehydeGeosmin
The invention discloses lysobacter sp and application thereof. The strain is named as lysobacter sp C8-1, is preserved in China General Microbiological Culture Collection Center (CGMCC) on September 28, 2017, and has a preservation number of CGMCC No.1.16271. Microbiological characteristic analysis and 16S rRNA gene sequence analysis show that the strain is a new type of bacteria. The strain can produce benzaldehyde and volatile compounds such as geosmin, elemene, elemol and alpha-eudesmol, and can be used for preparing tobacco flavor after subjected to fermentation. The obtained flavor has very special aroma, thus being capable of enhancing the style of cigarettes, enriching cigarette fragrance, and enabling the aroma to be mellow and fuller; furthermore, the strain has antibacterial andfungal activity, and is stable and lasting in effect. In addition, the strain has great potential in development of novel, highly effective, non-toxic natural medicines.
Owner:CHINA TOBACCO YUNNAN IND
Bacillus pumilus and application of bacillus pumilus in controlling over geosmin in white spirit
ActiveCN104004693AReduce the concentration of geosminReduced Streptomyces levelsBacteriaAlcoholic beverage preparationAntibiosisYeast
The invention discloses novel bacillus pumilus which is separated from high-temperature spirit brewing yeast. The bacillus pumilus was preserved at the China Center For Type Culture Collection (CCTCC) in August 12th, 2013, and the preserving serial number is CCTCC NO: M2013372. A certain amount of bacillus pumilus is added during white spirit brewing, so that generating of the geosmin in the white spirit is controlled. The bacillus pumilus can synthesize antibiosis lipopeptid active substances to inhibit growing of geosmin streptomycete generated during white spirit brewing and synthesis of the geosmin, and the geosmin in white spirits with different flavors of a thick type, a thin type and a paste type can be controlled fundamentally.
Owner:JIANGNAN UNIV
Synthesis method of geosmin
InactiveCN102557882AHigh yieldLow pricePreparation by oxygen reductionCyclohexanoneSynthesis methods
The invention provides a synthesis method of geosmin. The method is characterized in that 2-methyl cyclohexanone used as a raw material for an initial reaction firstly is in ammoniation reaction with (S)-Alpha-phenylethylamine to produce an enimic compound; the enimic compound is in substitution reactio with olefine ketone to produce an enimic compound substituted by pentyl ketone; afterwards, the enimic compound is converted to a cyclohexanone derivative under an acidic condition; Alpha, Beta unsaturated derivatives are produced through intramolecular cyclization under an alkaline condition; and the enimic compound is subject to reactions of epoxidation reaction, reduction, dehydroxylation, and the like to produce the final target compound, namely the geosmin. The synthesis method of the geosmin, which is provided by the invention, has the advantages that the efficiency is high, the operation is simple, convenient and safe, the costs of raw materials used for the reactions are low, the use amount of solvents is small, and the preparation cost can be reduced on the premise that the product purity and the yield are guaranteed, so that the synthesis method is very suitable for hundred-milligram scale batch production.
Owner:天津市佰斯康科技有限公司 +1
Method for extracting geosmin
InactiveCN110272330AIncrease contentShorten production timeOrganic compound preparationComponent separationCentrifugationEvaporation
The invention relates to a method for extracting geosmin from beetroot. The method comprises the steps that S1, raw materials are prepared firstly, wherein the fresh beetroot is selected and cleaned in water to remove surface stains; S2, the beetroot in S1 is placed in a sodium chloride solution which is 1-2 times the volume of the beetroot and crushed by a stirrer, and a supernatant is kept after centrifugation; S3, the supernatant is taken, an equal volume of diethyl ether is added, and a mixture is placed on a vortex instrument for shaking and mixing extraction; S4, an organic phase in S3 is taken, dehydrated with anhydrous sodium sulfate and then concentrated through rotary evaporation under reduced pressure to prepare a sample, and the sample is preserved at 4 DEG C. The method for extracting the geosmin is simple in step, safe to operate, low in production raw material price and high in content and can greatly reduce the production cost.
Owner:XIANGNAN UNIV
Application of microecological preparation in removing earthy smell and method for removing earthy smell of fishes in RAS system
ActiveCN112047493AReduce energy consumptionPromote degradationBacteriaClimate change adaptationBiotechnologyMicroorganism
The invention discloses an application of a microecological preparation for removing earthy smell and a method for removing earthy smell of fish in an RAS system, and particularly discloses an application of microbacterium, bacillus aquatica and flagellate marine bacteria for removing earthy smell and a method for removing earthy smell of fish in the RAS system. The microbacterium with the preservation number of ACCC-02712 can degrade geosmin and 2-methylisoborneol. The bacillus aquatica with the preservation number of CGMCC-1.7029 can degrade geosmin. The flagellate marine bacteria with the preservation number of CGMCC-1.12664 can be used for degrading the 2-methylisoborneol. According to the method for removing the earthy smell of the fishes in the RAS culture system, microbacterium withthe preservation number of ACCC-02712 is added into culture water of the RAS culture system, the thallus density of the microbacterium is larger than or equal to 109 cfu / mL, and the volume ratio of the adding amount of the microbacterium to the culture water is 0.5-1.2 mL: 1 m3. The microbial inoculum is used for removing the earthy smell of the fishes in the RAS culture system, the content of substances generating the earthy smell can be controlled, and the number of microorganisms generating the earthy smell can be controlled from the origin.
Owner:CHONGQING TECH & BUSINESS UNIV +1
Kineococcus cavernae sp. and application thereof
InactiveCN107164258AIncrease diversityTo meet the needs of cigarette productionTobacco preparationBacteriaSequence analysisBacteroides
The invention discloses a kineococcus cavernae sp. and an application thereof. The strain is named kineococcus cavernae sp. SYSUZL-1, and is preserved in the China Center For Type Culture Collection (CCTCC) on December 9, 2016, and the preservation number is M2016738. A microbiological characteristic analysis and a 16SrRNA gene sequence analysis indicate that the strain is a novel bacterium. The strain can produce benzaldehyde and volatile compounds including geosmin, elemene, elemol and Alpha-eudesmol, and after fermentation, a tobacco flavor can be prepared. The obtained flavor has unique fragrance, can enhance a cigarette style, and can enrich cigarette fragrance, so that the fragrance is fuller, moreover, the flavor has antibacterial and antifungal activity, and the effect is stable and persistent. In addition, the strain also has a tremendous potential in the development of novel, highly effective, nontoxic and natural medicines.
Owner:CHINA TOBACCO YUNNAN IND
Process for removing geosmin in raw water of drinking water
InactiveCN108996739AImprove securityGood for healthWater contaminantsWater aerationWater useFiltration
The invention relates to a process for removing geosmin in raw water of drinking water. The process comprises the following steps: introducing raw water into a raw water tank; carrying out aeration inthe raw water tank by using a blower, and adding ozone into the raw water tank for strong oxidation at the same time; mixing the water out of the raw water tank with a coagulant for a coagulation reaction; carrying out filtration after full coagulation; introducing filtered drinking water into a clean water tank; transporting the treated drinking water to each water use site by using a frequencyconversion water supply device; and arranging disinfection device between the water out of the clean water tank and the frequency conversion water supply device for disinfection treatment. Compared with the prior art, the treatment process provided by the invention has the advantages of high pollutant removal efficiency, high utilization rate of ozone and activated carbon, less dosage, less investment of water treatment equipment, no secondary pollution and the like.
Owner:SHANGHAI EMPEROR OF CLEANING HI TECH
Geosmin producing strain
InactiveCN102719375BSolve problems with geosmin sourcesBacteriaMicrobiological testing/measurementBiotechnologyAroma aroma
Owner:JIANGNAN UNIV
Method for measuring off flavor compound geosmin not caused by hulls in Chinese white spirit
ActiveCN101893615BExtraction temperature optimizationExtraction time optimizationComponent separationPreparing sample for investigationBiotechnologyOff-flavour
The invention discloses a method for measuring off flavor compound geosmin not caused by hulls in Chinese spirits, and belongs to the field of wine flavor study. The invention establishes a method for quickly measuring a common off flavor compound geosmin (GSM for short) in white spirit by a headspace solid-phase microextraction (HS-SPME) and gas chromatography-mass spectrography (GC-MS) couplingtechnique. The off flavor substance extracting condition from the white spirit is optimized so as to obtain the optimal extraction condition, namely the alcoholic strength of the white spirit is diluted to 3-12 volume percent and the off flavor substance is extracted at the constant temperature of between 40 and 60 DEG C for 30 to 45 minutes by the HS-SPME method. The method has good linear relation (R2 is more than 0.99) in the detection range. The limit of detection (LOD) of the off flavor compound geosmin is lower than a threshold of a corresponding compound. Results show that the method is a quantitative method with good selectivity and sensitivity, and is suitable for studying the off flavor compound with a lower threshold in the white spirit.
Owner:莱鼎电子材料科技有限公司
Method for conveniently and quickly detecting odor substances including geosmin and dimethyl isoborneol in water source
ActiveCN110672774ARealize analysis and detectionRealize detectionComponent separationWater sourceGeosmin
The invention discloses a method for conveniently and rapidly detecting odor substances including geosmin and dimethyl isoborneol in a water source, and belongs to the technical field of analytical chemistry. The method is based on the dispersion liquid-liquid microextraction technology, achieves the effective enrichment and extraction of 2-MIB and GSM in a to-be-detected water sample by utilizinga specific device and a specific treatment method for the sample, and then achieves the analysis and measurement of the content of 2-MIB and GSM in the water sample by utilizing a gas chromatograph-mass spectrometer, thereby achieving the rapid separation and detection of trace 2-MIB and GSM in the water sample. The method provided by the invention is suitable for conventional drinking water andwell water or river water in a natural environment, can realize effective enrichment, rapid separation, analysis and detection of odor substances in various water bodies, and especially realizes detection of the odor substances in the water bodies in the natural environment.
Owner:广州华速信息技术有限公司
Methods of processing raw foods and related food products
InactiveUS20140050830A1Great tasteExtended shelf lifeMilk preservationDough treatmentFood flavorGeosmin
A method of eliminating the off-flavor of soy beans, wherein the off-flavor of the soy beans is not related to geosmin, the method comprising:providing soy beans in a vacuum tumbler equipped with lifting ribs;tumbling the soy beans in a temperature range from about 0.5° C. to about 27° C. in an alternating environment of a vacuum and an acidic solution that is not hypotonic and does not comprise sodium, wherein the lifting of the ribs lift the soy beans completely out of the acidic solution when the soy beans are in the vacuum environment;andremoving at least a portion of the moisture from the soy beans; wherein said process produces soy beans that have no-off flavor are free of trans fats and retain good flavor is described along with related products.
Owner:GROVAC SYST INT L C
Standard substance for quantitatively detecting bacterial strains producing geosmin and preparation and detection method
The invention discloses a standard substance for quantitatively detecting bacterial strains producing geosmin and a preparation and detection method. The detection method comprises the following stepsthat step one, a recombinant plasmid is used as a standard substance template, PCR amplification is carried out by real-time quantitative PCR, a standard curve corresponding to concentration of the standard substance and a critical recurring number is established, the recombinant plasmid is a recombinant plasmid comprising a GSY gene or a recombinant cell comprising the GSY gene, and a sequence of the GSY gene is composed of 125 deoxyribonucleotides and is a sequence in a sequence table SEQ ID NO.1; and step two, a sample to be tested is used for replacing the standard substance in the step one, real-time quantitative PC amplification is carried out, according to the critical recurring number and the standard curve of an amplified result, a copy number of the GSY gene in the sample to betested is obtained, and namely, the number of the bacterial strains producing the geosmin in the sample to be tested is obtained. According to the standard substance for quantitatively detecting the bacterial strains producing the geosmin and the preparation and detection method, rapid and quantitative detection of the bacterial strains producing the geosmin in a water environment sample can be realized.
Owner:SHANGHAI MUNICIPAL WATER RESOURCES DEV & UTILIZATION NAT ENG CENT
Method for degrading odor substances in water based on disinfection technology
InactiveCN112777677AEfficient removalTo achieve the purpose of disinfectionWater/sewage treatment by irradiationSpecific water treatment objectivesWater basedMeth-
The invention discloses a method for degrading odor substances in water based on a disinfection technology, which comprises the following steps: adding a disinfectant solution into water containing smelly substances, then carrying out ultraviolet irradiation, and after a period of reaction, sampling and analyzing to obtain the degradation effect of the smelly substances in water. The odor substance is 2-methylisoborneol or geosmin, the disinfectant is a chloramine solution, and the irradiation intensity of ultraviolet irradiation is (1.42-4.26) * 10<-6 > Einstein.L<-1 >. S<-1 >. The method is easy to operate, remarkable in effect, safe to use and environmentally friendly. A relatively good degradation effect can be achieved in a short time under a normal-temperature condition, and a good degradation effect is achieved under neutral, acidic or alkaline conditions. According to the technology, other equipment and medicaments do not need to be additionally added, the operation is simple, the efficient degradation of the odor substances in the water can be realized, and meanwhile, the synergism of ultraviolet and chloramine combined disinfection can be exerted.
Owner:天津水务集团有限公司 +1
Heavy metal passivation and geosmin inhibition agent in aquaculture process, and preparation method thereof
InactiveCN111019685AWide range of passivationImprove passivation effectWaste water treatment from animal husbandryBiofuelsCondensation processMetallurgy
Owner:HEILONGJIANG RIVER FISHERY RES INST CHINESE ACADEMY OF FISHERIES SCI
Method for inhibiting geosmin in yeast for making hard liquor
The invention discloses a method for inhibiting geosmin in yeast for making hard liquor, and belongs to the technical field of microorganisms. According to the invention, the microbial agent containing Bacillus licheniformis, Bacillus pumilus, Saccharomyces cerevisiae and Lactobacillus brevis is added into the yeast for making hard liquor, so that the microorganism capable of producing the geosminin the yeast for making hard liquor is inhibited, the content of the geosmin in the yeast for making hard liquor is greatly reduced, the content of the geosmin in the yeast for making hard liquor obtained by adding the microbial agent of the invention is reduced to about 3.4 mug / kg, compared with that of the yeast for making hard liquor obtained by not adding the microbial agent of the invention,the average decrease is about 70% ,and decrease range is obvious.
Owner:JIANGNAN UNIV +1
Thermoactinomyces thalpoillus strain and application thereof
ActiveCN106434501ANo pollutionStrong toleranceBacteriaMicroorganism based processesSporeThermoactinomyces
The invention discloses a thermoactinomyces thalpoillus strain and application thereof. The thermoactinomyces thalpoillus strain is morphologically characterized in that the strain is cultured on an ISP2 culture medium for 3 days at 50 DEG C, wherein round protruding non-transparent colonies 6-7mm in diameter are dry, dense and less prone to being poked, have rugae and white spores and are free from soluble pigment, medium mycelia are faint yellow, and aerial mycelia are white; under observation of a scanning electron microscope, single spores are formed on the mycelia and insert on the same without stems or directly, and single side of every spore grows on two sides of the corresponding mycelium; the thermoactinomyces thalpoillus strain is waxy in texture, non-transparent and smooth in colony edge. The thermoactinomyces thalpoillus strain is capable of yielding geosmin substances.
Owner:GUIZHOU UNIV
Pretreatment method for detecting geosmin substances in aquatic products
ActiveCN113176355AHigh recovery rateImprove applicabilityComponent separationClimate change adaptationPretreatment methodAquatic product
A pretreatment method for detecting geosmin substances in aquatic products comprises the following steps: taking edible tissues of a water product, cutting the edible tissues into pieces, putting the pieces into a centrifuge tube with a plug, then adding papain and double distilled water, carrying out vortex treatment, uniformly mixing, and standing in a water bath; then adding n-hexane, whirling, uniformly mixing, placing in an ultrasonic bath, centrifuging, taking the supernatant, repeating the steps in sequence, merging the two supernatants, and transferring into a new centrifuge tube with a plug; adding a purification extraction bag into the centrifugal tube with the plug; carrying out vortex and centrifugation on the centrifugal tube, taking supernate, transferring the supernate to a new centrifugal tube, and sealing a cover for later use; using a solid-phase extraction column, using normal hexane for leaching, usingethyl acetate for elution, and after eluent passes through an organic phase filter membrane, performing GC-MS automatic sample injection and detection. According to the method, the pretreatment time and the use cost of consumables are greatly saved, the detection recovery rate of the geosmin substances in the aquatic products can be increased to about 80%, the treatment method is simple and can be operated in batches, and the applicability of the method is also enhanced in the aspect of quality control.
Owner:FRESHWATER FISHERIES RES CENT OF CHINESE ACAD OF FISHERY SCI
Strain for producing geosmin
InactiveCN102719376BSolve problems with geosmin sourcesBacteriaMicrobiological testing/measurementBiotechnologyAroma aroma
The invention discloses a strain for producing geosmin, and belongs to the technical field of biotechnology. The invention discloses a method for screening and identifying related strains of aroma components produced by microbial metabolism in screened white spirit in the starter propagation process by combining aroma smelling means and using flavor orientation. By using the method, a strain of the geosmin is successfully screened from yeast produced by an aromatic white spirit factory and named as FJ-HX; and according to colony, cellular morphology, physiological and biochemical property and 16SrRNA gene sequence comparison result, the strain is streptomyces fradiae.. The strain can accumulate a large quantity of geosmin in a potato-glucose culture medium. The problem about the source of the geosmin in the aromatic white spirit is solved. The screened streptomyces fradiae can be used as a type strain, and is used for detection and production mechanism research of the strain for producing the geosmin in white spirit production.
Owner:JIANGNAN UNIV
System and method for removing natural organic substances and odor-induced substances in micro polluted water
InactiveCN102092899BEfficient removalReduce generationMultistage water/sewage treatmentFiltration membraneNatural organic matter
Owner:TSINGHUA UNIV
Flavoring special for tilapia mossambica and using method thereof
Owner:BAIYANG INVESTMENT GRP INC
Method for determining geosmin and dimethyl isoborneol in fish body based on rapid pretreatment technology
ActiveCN113960236AReduce usageThe pre-processing process is simpleComponent separationClimate change adaptationSolid phase extractionZoology
The invention belongs to the technical field of aquaculture and food monitoring, discloses a method for determining geosmin and dimethylisoborneol in a fish body based on a rapid pretreatment technology, and establishes a detection method for determining GSM and 2MIB in fish tissues through dispersive solid phase extraction-gas chromatography-mass spectrometry. The method comprises the following steps: extracting a sample with an acetonitrile solution, and performing salting-out assisted extraction; after purification, under a gradient heating condition, subjecting a target analyte to qualitative analysis by comparing retention time and ion pair information in a selected ion monitoring mode, and performing quantification by an internal standard method. The method has the advantages of small required sample amount and reagent amount, high analysis speed, high sensitivity and good reproducibility. The method can meet the large-batch detection requirements of GSM and 2MIB in fish tissue samples, and provides a rapid detection technical guarantee for evaluating the occurrence condition of earthy smell substances in fish tissues and exploring the reduction and removal of typical earthy smell substances in fish bodies.
Owner:DALIAN OCEAN UNIV +1
A kind of inhibition method of geosmin in Daqu
Owner:JIANGNAN UNIV +1
A kind of Bacillus amyloliquefaciens and its application in controlling earthy odor in liquor
ActiveCN104073453BReduce the concentration of geosminReduced Streptomyces levelsBacteriaAlcoholic beverage preparationAmyrisYeast
The invention discloses a novel bacillus amyloliquefaciens, wherein a bacillus amyloliquefaciens is separated from high-temperature white spirit brewing yeast, and collected in the China Centre for Type Culture Collection (CCTCC) on August 12, 2013, and the collection number is CCTCC NO: M2013368; and the generation of geosmin smell in white spirit can be controlled by adding a certain amount of bacillus amyloliquefaciens during the white spirit brewing process. The strain is capable of synthesising active substances such as antimicrobial lipopeptides, suppressing the growth of geosmin-generating streptomycete and the synthesis of geosmin during the white spirit brewing process, and fundamentally controlling the geosmin smell in white spirits of a highly flavoured type, a faint flavour type, a soy sauce flavour type and the like.
Owner:JIANGNAN UNIV
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