WO2020053362A1 - Procédé de culture d'un microorganisme d'intérêt et installation associée - Google Patents
Procédé de culture d'un microorganisme d'intérêt et installation associée Download PDFInfo
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- WO2020053362A1 WO2020053362A1 PCT/EP2019/074424 EP2019074424W WO2020053362A1 WO 2020053362 A1 WO2020053362 A1 WO 2020053362A1 EP 2019074424 W EP2019074424 W EP 2019074424W WO 2020053362 A1 WO2020053362 A1 WO 2020053362A1
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- microorganism
- culture
- culture medium
- contaminating microorganisms
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Classifications
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
- C12N1/00—Microorganisms, e.g. protozoa; Compositions thereof; Processes of propagating, maintaining or preserving microorganisms or compositions thereof; Processes of preparing or isolating a composition containing a microorganism; Culture media therefor
- C12N1/20—Bacteria; Culture media therefor
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12M—APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
- C12M33/00—Means for introduction, transport, positioning, extraction, harvesting, peeling or sampling of biological material in or from the apparatus
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12M—APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
- C12M47/00—Means for after-treatment of the produced biomass or of the fermentation or metabolic products, e.g. storage of biomass
- C12M47/06—Hydrolysis; Cell lysis; Extraction of intracellular or cell wall material
Definitions
- the present invention applies to the field of microbial biomass culture in autotrophy and heterotrophy.
- the present invention relates to a method of culturing at least one microorganism of interest, in heterotrophy or mixotrophy, and a culture installation in particular suitable for the implementation of said culture method.
- Heterotrophy is the need for a living organism to feed on preexisting organic constituents.
- the concept of heterotrophy is opposed to that of autotrophy which is the mode of nutrition of living organisms which can feed only on inorganic food in the presence of an external energy source, for example light (photoautotrophy).
- Mixotrophy is the mode of nutrition of living organisms characterized by the fact that they are capable of feeding either by autotrophy or by heterotrophy or by the two trophic modes simultaneously or even by primitive bacterial photosynthesis.
- the heterotrophic or mixotrophic processes in an open environment are not applied today.
- the open environment generally involves the occurrence of contamination of cultures by various contaminating microorganisms which affect the yield in terms of the culture process due to the consumption by the contaminating microorganism (s), of nutrients intended for the microorganisms of interest.
- contaminating microorganisms also affect the expected quality of the final product (biomass of microorganisms of interest) simply because of their significant presence.
- the present invention relates to a method of culturing at least one microorganism of interest, in heterotrophy or mixotrophy, in an aqueous culture medium, contaminating microorganisms developing naturally in said culture medium , characterized in that it comprises:
- Culture medium is understood to mean a medium comprising nutrients allowing the development of the microorganism of interest and contaminating microorganisms.
- portion is meant a volume withdrawn per unit of time, for example per day or per hour.
- portion can be considered as a daily or hourly flow rate, that is to say a volume withdrawn respectively per day or per hour, from the culture medium.
- This volume is preferably, per day, greater than or equal to once the volume of the culture medium and, preferably, greater than or equal to three times the volume of the culture medium. More preferably, the portion taken corresponds to a volume collected per hour greater than or equal to 1/24 th of the total volume of the culture medium.
- This volume taken daily makes it possible to maintain a quantity of microorganism of interest and contaminating microorganisms compatible with correct operation of the process which is the subject of the present invention.
- This culture process has the advantage of allowing the culture in an open or closed environment of microorganisms of interest without affecting the yield of microorganism of interest because, the contaminants being normally troublesome for the culture in an open environment, are useful for the development of or microorganisms of interest according to the process which is the subject of the present invention. Indeed, the lysate of contaminating microorganisms represents an assimilable nutritive contribution for the microorganism of interest, in particular in organic carbon. Culture in an open environment being permitted by this culture process, the investment and operating costs of said process are advantageously minimized because aseptic conditions are not necessary.
- the invention also meets the following characteristics, carried out separately or in each of their technically operative combinations.
- the physical separation step comprises a filtration or gravity separation step so as to obtain separately the microorganism of interest on the one hand and the contaminating microorganisms on the other hand.
- the microorganism of interest separated by the separation step is reintroduced into the culture medium, alone or in admixture with the lysate.
- the aqueous culture medium is initially devoid of organic carbon.
- the microorganism of interest is left in autotrophic culture for a time t before the sampling step.
- the time t is chosen so as to obtain a concentration of microorganism of interest in the culture medium included between 5.10 s cells per milliliter and 1.10 7 cells per milliliter.
- the culture in autotrophy during time t advantageously makes it possible to validate the correct physiological state of the microorganism of interest and to establish reference data as to its growth performance.
- a transition from autotrophy mode to mixotrophy mode is achieved by mixing the lysate of contaminating microorganisms with the microorganism of interest, said lysate providing in particular a nutritious supply of organic carbon to the microorganism of interest.
- the heterotrophy mode is all the more reinforced by a step of supplying organic carbon, supplied by a source other than the lysate of contaminating microorganisms, in culture medium.
- the method includes a step of supplying organic carbon into the culture medium.
- This supply of organic carbon can be carried out directly in the culture medium, in the lysate, in the microorganism of interest separated by physical separation, in the lysate / microorganism mixture of separate interest, or in a combination of at least two of these.
- the culture method comprises a step of concentrating the contaminating microorganisms separated by the physical separation step.
- concentration step of contaminating microorganisms is advantageous in that it allows lysis of a greater number of contaminating microorganisms during the lysis step.
- the concentration step comprises a step of filtration or gravity separation so as to obtain separately the concentrated contaminating microorganisms on the one hand and from the culture medium devoid of contaminating microorganisms on the other hand .
- This has the advantage of allowing the recycling of the culture medium devoid of contaminating microorganisms.
- this has the particular advantage of reducing the costs of lysis due to a reduction in the volume of contaminating microorganisms to be lysed following concentration.
- the culture medium comprises several microorganisms of different interest, said process comprising, upstream of the physical separation step, a prior step of isolation of a single type of microorganism of interest chosen or from a set of microorganisms of different interests chosen from said sampled portion, so that when this portion is the subject of physical separation it includes only said single type of microorganism of interest chosen or said set microorganisms of different interests chosen.
- the culture process comprises a repeated cycle of its stages.
- the method comprises a repeated cycle of at least the steps of sampling, physical separation, lysis and reintroduction.
- said repeated cycle also includes the concentration step, and / or the step of adding organic carbon.
- the process which is the subject of the present invention can be qualified as a process for growing at least one microorganism of interest in cyclotrophy.
- said at least one microorganism of interest is the cyanobacterium Aphanizomenon flos-aquae (AFA).
- the present invention relates to an installation for culturing at least one microorganism of interest, in heterotrophy or mixotrophy, comprising:
- At least one open or closed culture compartment configured to receive an aqueous culture medium, said at least one microorganism of interest and contaminating microorganisms;
- At least one separation device configured to perform at least one physical separation of the microorganism of interest and the contaminating microorganisms within a portion of the culture medium
- a lysis device configured to perform lysis of the contaminating microorganisms separated by physical separation so as to produce a lysate
- - means of transport configured for at least:
- o take a portion of the culture medium comprising the microorganism of interest and contaminating microorganisms
- the invention also meets the following characteristics, implemented separately or in each of their technically operative combinations.
- the means of transport are further configured to unify the lysate with the microorganism of interest isolated by physical separation, so as to form a mixture, and reintroduce said mixture into the culture compartment.
- the means of transport are further configured to supply organic carbon to the culture medium directly in the culture compartment, in the lysate, in the lysate / microorganism mixture of separate interest or to the microorganism of interest separated by physical separation.
- This supply of organic carbon comes from a source other than the lysate of contaminating microorganisms.
- the culture installation comprises at least one concentration system configured to concentrate the contaminating microorganisms isolated by physical separation.
- the means of transport include means:
- the culture installation includes a device for purging contaminating microorganisms.
- a device for purging concentrated contaminating microorganisms is a device for purging.
- the culture installation comprises a device for purging the culture medium devoid of contaminating microorganisms and of microorganism of interest.
- the culture installation comprises a device for collecting the microorganism of interest.
- FIG. 1 illustrates the steps included in the culture method object of the present invention according to implementation modes.
- FIG. 2 illustrates a culture installation object of the present invention according to one embodiment.
- FIG. 3 graph of the evolution of the mass concentration of Aphanizomenon flos-aquae (AFA) over time in a culture medium according to the implementation of the process object of the present invention in autotrophy or in mixotrophy with reintroduction of different lysate concentrations.
- AFA Aphanizomenon flos-aquae
- FIG. 1 illustrates a process 20 for cultivating at least one microorganism of interest, in heterotrophy or mixotrophy, in an aqueous culture medium, contaminating microorganisms developing naturally in said culture medium, according to a particular mode of implementation artwork.
- the method includes a step 21 of sampling a portion of the culture medium comprising the microorganism of interest and contaminating microorganisms.
- method 20 is carried out in mixotrophy, the aqueous culture medium being initially devoid of organic carbon and the microorganism of interest is left in autotrophic culture for a time t before step 21.
- the method 20 includes a step 22 of physical separation of the microorganism of interest and the contaminating microorganisms within the portion of the culture medium.
- the carrying out of step 22 of physical separation can be based on a morphological or phenotypic difference between the microorganisms of interest and the contaminating microorganisms. For example, it can be a difference in size, shape, surface properties, density, propensity to aggregate or flocculation.
- step 22 of physical separation comprises a filtration step or gravity separation so as to obtain separately the concentrated contaminating microorganisms from a on the one hand and nutrient medium on the other.
- An example of filtration used in a preferred embodiment is tangential filtration or even frontal filtration. Filtration can be carried out using a membrane.
- Method 20 also includes an optional step 23 for concentrating the contaminating microorganisms isolated in step 22.
- the optional step 23 of concentration of the contaminating microorganisms can be based on a morphological or phenotypic characteristic of the contaminating microorganisms. For example, it can be their size, shape, surface properties, density, propensity to aggregate or flocculate.
- the concentration step 23 comprises a filtration or gravity separation step so as to obtain separately the concentrated contaminating microorganisms on the one hand and from the culture medium devoid of contaminating microorganisms on the other hand .
- a filtration or gravity separation step so as to obtain separately the concentrated contaminating microorganisms on the one hand and from the culture medium devoid of contaminating microorganisms on the other hand .
- an example of filtration used is tangential filtration or even frontal filtration, and the filtration can in particular be carried out using a membrane.
- the method 20 comprises a step 24 of lysis of the contaminating microorganisms separated by the physical separation so as to produce a lysate.
- This lysate advantageously represents nutrients which can be assimilated by the microorganism of interest, in particular organic carbon.
- the lysis step 24 may comprise chemical lysis and / or thermal lysis and / or mechanical lysis, of contaminating microorganisms.
- Method 20 also includes a step 25 of reintroducing said lysate into the culture medium.
- step 25 is carried out so that the lysate is reintroduced into the culture medium in admixture with the microorganism of interest isolated by step 22 of physical separation.
- method 20 includes an optional step 26 of supplying organic carbon to the culture medium.
- This organic carbon comes from a source other than the lysate of contaminating microorganisms. Indeed, this addition of organic carbon from step 26 is an additional contribution to the supply of nutrients (including organic carbon) present in the lysate of contaminating microorganisms.
- step 26 of supplying organic carbon into the culture medium is done by introducing said organic carbon into the mixture of lysate and microorganism of interest, in the lysate alone, in the microorganism of interest isolated by the step 22 of physical separation or in the aqueous culture medium directly.
- the method comprises a repeated cycle of steps 21 to 26, steps 23 and 26 remaining optional.
- step 26 of adding organic carbon is introduced into a cycle C1 of steps 21 to 25, after the implementation of at least one cycle C1, thus creating a cycle C2 of steps 21 to 26 which is subsequently repeated as many times as necessary.
- l step 26 of adding organic carbon is introduced from the implementation of the first cycle of steps 21 to 25, before the sampling step 21, thus causing the process 20 to start with cycle C2, said step 26 being carried out by addition of organic carbon directly into the aqueous culture medium at least in the first cycle C2.
- the culture method comprises a step (not shown in the figures) of clarification of the lysate obtained by step 24 of lysis, a concentration and / or an adjustment of the pH of the lysate, before l 'reintroduction step 25.
- FIG. 2 illustrates an installation 27 for culture of at least one microorganism of interest 28 in heterotrophy or mixotrophy.
- the installation advantageously does not need to be in sanitized condition, neither beforehand, nor during its use for cultivation.
- the installation 27 comprises an open culture compartment 29 or closed configured to receive an aqueous culture medium 30, said at least one microorganism of interest 28 and contaminating microorganisms 32.
- the installation 27 also comprises at least one separation device 33 configured to carry out at least one physical separation of the microorganism of interest 28 and the contaminating microorganisms 32 within a portion of the culture medium 30.
- the installation 27 includes a lysis device 34 configured to perform a lysis of the contaminating microorganisms 32 separated so as to produce a lysate 35.
- the installation further comprises at least one concentration system 36 configured to concentrate the contaminating microorganisms 32 separated before their lysis.
- the installation 27 comprises means of transport configured for at least:
- o take a portion of the culture medium 30 comprising the microorganism of interest 28 and contaminating microorganisms 32;
- the means of transport are further configured to unify the lysate 35 with the separate microorganism of interest 28, so as to form a mixture and reintroduce said mixture into the culture compartment 29.
- the means of transport are configured to supply organic carbon to the culture medium 30 directly in the culture compartment 29 or to the lysate 35 or to the microorganism of interest 28 separated by physical separation or to the mixture of lysate 35 and microorganism of interest 28 or in a combination of at least two of these.
- the means of transport include means:
- the installation 27 comprises an organic carbon reservoir 45.
- the seventh stream 43 is preferably generated so that it leaves the reservoir 45.
- the fifth stream 41 is preferably devoid of microorganisms of interest.
- the means for generating the various flows comprise at least one motor and / or one pump (not illustrated in the figures).
- the installation 27 comprises a first device 46 for purging contaminating microorganisms 32, a second device 47 for purging culture medium 30 free of microorganisms of interest and contaminating microorganisms and a harvesting device 48 of the microorganism of interest 28.
- the method 20 for cultivating at least one microorganism of interest 28, in heterotrophy or mixotrophy, is detailed below according to a method of implementation. in which an installation 27 which is the subject of the present invention is used in particular according to one of its embodiments:
- microorganism of interest 28 is preferably left in autotrophic culture for a time t.
- Organic carbon is then introduced directly into the culture compartment 29 according to step 26, via the seventh stream 43 of organic carbon leaving the reservoir 45.
- the culture then goes into mixotrophy and contaminating microorganisms 32 develop in the culture medium 30 with the microorganism of interest 28.
- step 21 a portion of the culture medium 30 comprising the microorganism of interest 28 and contaminating microorganisms 32 is removed by generation of the first flow 37 of culture medium 30 from the compartment 29 to the apparatus for separation 33.
- the separation apparatus 33 is carried out the step 22 of physical separation of the microorganism of interest 28 and the contaminating microorganisms 32 within the portion of the culture medium 30 sampled.
- this step 22 is carried out by tangential membrane filtration.
- the second flow 38 of microorganism of interest 28 leaving the separation apparatus 33 is generated, as well as the third flow 39 of contaminating microorganisms 32 from the separation apparatus 33 to the system of focus 36.
- the optional step 23 of concentration of the contaminating microorganisms 32 separated by the step 22 is carried out by tangential membrane filtration.
- This step 23 can be considered as a second physical separation enabling the contaminating microorganisms 32 to be separated on the one hand in a concentrated manner and on the other hand from the culture medium 30 devoid of contaminating microorganisms 32 and of microorganism of interest 28.
- the fourth stream 40 of concentrated contaminating microorganisms 32 is generated from the concentration system 36 to the lysis device 34, and the fifth stream 41 of culture medium 30 devoid of contaminating microorganisms 32 and of microorganism of interest 28, is generated from the concentration system 36 towards the culture compartment 29.
- the lysis device 34 then takes place the step 24 of lysis of the contaminating microorganisms 32 separated and concentrated, so as to produce the lysate 35.
- the third stream 39 is directly directed to the lysis device 34 in an embodiment where the concentration step 23 does not take place.
- the lysis step 24 is carried out on the contaminating microorganisms 32 separated coming directly from the separation apparatus 33 via the third stream 39.
- the lysate 35 is reintroduced into the culture medium 30 within the culture compartment 29 by generation of the sixth stream 42 of lysate 35.
- the second stream 38 of microorganisms of interest 28 and the sixth stream 42 of lysate 35 are unified so as to form a current mixture towards the compartment 29.
- This cycle C2 of the culture process can be repeated several times.
- the seventh stream 43 of organic carbon leaving the reservoir 45 which is generated is preferably unified with the second stream 38 and the sixth stream 42 so as to form the eighth single flow 44 of current mixture to compartment 29 into which it is reintroduced.
- the microorganism of interest 28 used in this study is an isolated phanizomenon flos-aquae (AFA) strain.
- AFA is a cyanobacterium of industrial and commercial interest.
- Contaminating microorganisms 32 models consist of a mixture of 5 strains of bacilli with different morphological and phenotypic characteristics. This mixture is in the form of a live, concentrated bacterial solution presented in liquid formulation.
- the solution sold under the reference "Bactilit TM" by the company CG PACKAGING can for example be used.
- the contaminating microorganisms 32 are initially introduced into the culture of cyanobacteria at the rate of a cell of the microorganism of interest 28 for a contaminating microorganism cell 32. Furthermore, it should be noted that a filament is considered like a cyanobacterium cell, whatever its size. Culture media
- the culture medium used is a BG1 1 medium (detailed composition provided in tables A to D), native for the culture in autotrophy, or, additive of whey powder at a final concentration of 4.5 gL 1 for the culture in mixotrophy .
- Table D composition of the BG11 nutrient solution
- AFA cultivation is carried out in an air-conditioned room, the temperature of which is regulated at 25 ⁇ 1 ° C.
- the culture inoculation rate was fixed at 5.10 5 and 1.10 6 cells. mL -1 .
- the method used consists of a first tangential filtration with membrane.
- the concentration of model contaminating microorganisms calls for a second physical separation between said contaminating microorganisms and from the BG1 1 culture medium carried out by a second tangential filtration with membrane.
- the first filtration uses a membrane having a porosity of 5 ⁇ m. It is possible, for the first tangential filtration, to use a membrane having a porosity of between 0.65 pm and 20 pm, and preferably between 1, 2 pm and 20 pm, preferably between 3 pm and 20 pm, and more preferably between 5 pm and 20 pm.
- the second filtration uses a membrane having a porosity of 0.2 ⁇ m. It is possible, for the second tangential filtration, to define a porosity threshold less than 5 pm, and preferably less than 3 pm, and preferably less than 1.2 pm, and preferably less than 0.65 pm , and preferably less than 0.2 ⁇ m.
- the permeation rate to be applied for the first tangential filtration (that is to say the rate of sampling a portion of the culture medium)
- it is preferably chosen a daily rate greater than or equal to once the volume of the culture facility 27, and preferably greater than or equal to three times the volume of the culture facility 27.
- tangential velocities to be applied in the first tangential filtration it is preferable to apply velocities less than or equal to 2.1 ms 1 , and preferably less than or equal to 0.7 ms 1 .
- hot alkaline lysis is used. A volume of 5N sodium hydroxide was added to the solution of concentrated contaminating microorganisms in order to reach a final concentration of 0.1 N. This solution was then kept at 70 ° C. for 10 minutes before being cooled. Results obtained
- step 21 of sampling the culture method the microorganism of interest is left in autotrophic culture in the culture medium 30 for a time t in order to validate the correct physiological state of the strain and establish data. benchmark for growth performance.
- time t the process is started in a cyclic manner repeatedly according to cycle C2 with step 26 of supplying organic carbon and step 23 of concentration.
- Cell concentration in cultures is estimated by measuring the absorbance of a liquid sample.
- Mass cell concentration is also measured by measuring suspended matter (MES).
- MES suspended matter
- [MES] material concentration in suspension
- Microbial growth is evaluated in terms of doubling time (or generation time, t g ) and volume productivity (rx).
- the autotrophic growth parameters of the AFA strain are a maximum suspended matter concentration ([M ES] max) of 0.75 gL 1 and a maximum volume productivity (r x max) of 26.10 3 gL 1 .j 1 .
- step 26 of supplying organic carbon to the culture medium a gain in productivity is observed despite the consumption of part of the organic carbon supplied by the contaminating microorganisms.
- the addition of lysate of contaminating microorganisms to the culture makes it possible to provide highly assimilable organic carbon and therefore, to recycle part of the initial organic carbon consumed by the contaminating microorganisms.
- the mass concentration of AFA was recorded over time (every hour for 150 hours) in a native BG11 culture medium (autotrophy: Control).
- the mass concentration of AFA was raised over time in BG1 1 culture media during trials for implementing the culture method which is the subject of the present invention carried out in mixotrophy, the step of reintroducing the lysate into the culture medium being carried out with different lysate concentrations (0.1 g / L or 1 g / L or 5g / L) according to the tests.
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Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
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CN201980059989.4A CN112689669A (zh) | 2018-09-14 | 2019-09-12 | 用于培养目的微生物的方法及相关设备 |
CA3111895A CA3111895C (fr) | 2018-09-14 | 2019-09-12 | Procede de culture d'un microorganisme d'interet et installation associee |
BR112021004625-9A BR112021004625A2 (pt) | 2018-09-14 | 2019-09-12 | método de cultura de um microrganismo de interesse e instalação associada |
US17/276,142 US20220049211A1 (en) | 2018-09-14 | 2019-09-12 | Method for cultivating a microorganism of interest and associated facility |
AU2019340582A AU2019340582B2 (en) | 2018-09-14 | 2019-09-12 | Method for cultivating a microorganism of interest and associated facility |
EP19769756.8A EP3850082A1 (fr) | 2018-09-14 | 2019-09-12 | Procédé de culture d'un microorganisme d'intérêt et installation associée |
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FR1858285A FR3085960B1 (fr) | 2018-09-14 | 2018-09-14 | Procede de culture d’un microorganisme d’interet et installation associee |
FR1858285 | 2018-09-14 |
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WO2020053362A1 true WO2020053362A1 (fr) | 2020-03-19 |
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PCT/EP2019/074424 WO2020053362A1 (fr) | 2018-09-14 | 2019-09-12 | Procédé de culture d'un microorganisme d'intérêt et installation associée |
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US (1) | US20220049211A1 (fr) |
EP (1) | EP3850082A1 (fr) |
CN (1) | CN112689669A (fr) |
AU (1) | AU2019340582B2 (fr) |
BR (1) | BR112021004625A2 (fr) |
CA (1) | CA3111895C (fr) |
FR (1) | FR3085960B1 (fr) |
WO (1) | WO2020053362A1 (fr) |
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2018
- 2018-09-14 FR FR1858285A patent/FR3085960B1/fr active Active
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2019
- 2019-09-12 BR BR112021004625-9A patent/BR112021004625A2/pt unknown
- 2019-09-12 CA CA3111895A patent/CA3111895C/fr active Active
- 2019-09-12 AU AU2019340582A patent/AU2019340582B2/en active Active
- 2019-09-12 CN CN201980059989.4A patent/CN112689669A/zh active Pending
- 2019-09-12 EP EP19769756.8A patent/EP3850082A1/fr active Pending
- 2019-09-12 WO PCT/EP2019/074424 patent/WO2020053362A1/fr active Application Filing
- 2019-09-12 US US17/276,142 patent/US20220049211A1/en active Pending
Non-Patent Citations (3)
Title |
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LUCA POLIMENE ET AL: "A substantial fraction of phytoplankton-derived DON is resistant to degradation by a metabolically versatile, widely distributed marine bacterium", PLOS ONE, vol. 12, no. 2, 3 February 2017 (2017-02-03), pages e0171391, XP055543097, DOI: 10.1371/journal.pone.0171391 * |
SULCIUS SIGITAS ET AL: "Establishment of axenic cultures from cyanobacterium Aphanizomenon flos-aquae akinetes by micromanipulation and chemical treatment", ALGAL RESEARCH-BIOMASS BIOFUELS AND BIOPRODUCTS, vol. 23, April 2017 (2017-04-01), pages 43 - 50, XP002788072, ISSN: 2211-9264 * |
VAZQUEZ-MARTINEZ GUADALUPE ET AL: "Strategy to obtain axenic cultures from field-collected samples of the cyanobacterium Phormidium animalis.", JOURNAL OF MICROBIOLOGICAL METHODS, vol. 57, no. 1, April 2004 (2004-04-01), pages 115 - 121, XP002788073, ISSN: 0167-7012 * |
Also Published As
Publication number | Publication date |
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CA3111895A1 (fr) | 2020-03-19 |
CA3111895C (fr) | 2023-10-03 |
BR112021004625A2 (pt) | 2021-05-25 |
US20220049211A1 (en) | 2022-02-17 |
AU2019340582B2 (en) | 2023-04-06 |
FR3085960A1 (fr) | 2020-03-20 |
AU2019340582A1 (en) | 2021-05-13 |
EP3850082A1 (fr) | 2021-07-21 |
CN112689669A (zh) | 2021-04-20 |
FR3085960B1 (fr) | 2020-11-27 |
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