WO2004078952A1 - 新規ウレタン結合分解菌 - Google Patents
新規ウレタン結合分解菌 Download PDFInfo
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- WO2004078952A1 WO2004078952A1 PCT/JP2004/002691 JP2004002691W WO2004078952A1 WO 2004078952 A1 WO2004078952 A1 WO 2004078952A1 JP 2004002691 W JP2004002691 W JP 2004002691W WO 2004078952 A1 WO2004078952 A1 WO 2004078952A1
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- WIPO (PCT)
- Prior art keywords
- microorganism
- urethane
- polyurethane
- compound
- decomposing
- Prior art date
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Classifications
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J11/00—Recovery or working-up of waste materials
- C08J11/04—Recovery or working-up of waste materials of polymers
- C08J11/10—Recovery or working-up of waste materials of polymers by chemically breaking down the molecular chains of polymers or breaking of crosslinks, e.g. devulcanisation
-
- 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
- C12N1/205—Bacterial isolates
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12P—FERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIRED CHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERS FROM A RACEMIC MIXTURE
- C12P1/00—Preparation of compounds or compositions, not provided for in groups C12P3/00 - C12P39/00, by using microorganisms or enzymes
- C12P1/04—Preparation of compounds or compositions, not provided for in groups C12P3/00 - C12P39/00, by using microorganisms or enzymes by using bacteria
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2375/00—Characterised by the use of polyureas or polyurethanes; Derivatives of such polymers
- C08J2375/04—Polyurethanes
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12R—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES C12C - C12Q, RELATING TO MICROORGANISMS
- C12R2001/00—Microorganisms ; Processes using microorganisms
- C12R2001/01—Bacteria or Actinomycetales ; using bacteria or Actinomycetales
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/62—Plastics recycling; Rubber recycling
Definitions
- the present invention relates to a novel microorganism and a method for decomposing polyurethane by a biological treatment method using the microorganism.
- Polyurethane contains a urethane bond and an ester bond or an ether bond in the molecule, and the decomposition proceeds when these bonds are broken.
- ester bonds in the polyol moiety are cleaved by bacteria.
- Dar by RT and Kap an AM: Appl. Micro obio l., 16, 900-905 (1968)) conducted various polydegradation tests with mold and found that It is reported that ester-based polyesters are more susceptible to decomposition and that the decomposition characteristics differ depending on the type of isocyanate-polyol. Kay (Kay, MJ, Mc Cabe, RW, Motoron, LHG: Int. Biot eteri o.
- polystyrene As a decomposing bacterium of a substance that can be used as a raw material for polystyrene, a bacterium derived from power vine has been reported (JP-A-09-192633), but there is no bacterium derived from bacteria that can be easily mass-cultured.
- Polybacterial degrading bacteria of solid polyurethane are polyester-polyurethane-degrading bacteria such as Nibacillus amylolyticus TB-13 (Japanese Patent Application No. 2002-334162) and Comamonas nasaci dovoran. s) TB- 35 strains (T.Nakaj ima-Kamb e, F. On uma, N.Ki mp ara and T.
- An object of the present invention is to provide a novel microorganism capable of decomposing a urethane compound, and a method for decomposing a urethane compound using the microorganism.
- microorganisms belonging to the genus Rhodococcus can degrade the urethane compounds.
- Rhodococcus It has not been known that microorganisms belonging to the genus Oral dococcus have the capability of degrading perennial compounds.
- the present inventors have found a method for degrading polypropylene using a microorganism belonging to oral dococcus.
- the present invention provides a microorganism belonging to the genus Oral dococcus having the ability to degrade a urethane compound, particularly a low-molecular-weight urethane compound used as a raw material for synthesizing polyurethane. It is intended to provide a method for decomposing polyurene.
- FIG. 1 shows the structure of a synthetic resin compound used for screening urethane-binding degrading bacteria.
- FIG. 2 shows a phylogenetic tree with known bacterial species determined based on the rDNA base sequence.
- FIG. 3 shows the measurement results of the residual amount of the compound I under each culture condition.
- FIG. 4 shows the measurement results of the amount of diamine produced under each culture condition.
- FIG. 5 shows the results of measuring the amount of cell growth under each culture condition.
- the present invention provides a microorganism belonging to the genus Rhodococcus, which has the ability to degrade a urethane compound, particularly a low-molecular-weight urethane compound used as a raw material for producing a polyurethane, and also belongs to the genus Rhodococcus.
- An object of the present invention is to provide a method for decomposing polyurethane using a microorganism.
- the microorganism belonging to the genus Rhodococcus and having the ability to degrade a urethane compound may be a known microorganism, or may be a newly screened microorganism.
- An example of microbial screening is as follows.Soil collected from various places is placed in a test tube containing a medium containing a low molecular weight polyurethane compound used as a raw material for polyurethane synthesis, and cultured at 30 ° C with shaking. After repeating the subculture every week, the culture supernatant was diluted and applied to the NB plate, and the culture was grown for 1-3 days at 3 Ot for the samples with turbidity and discoloration in the culture medium. The colonies that have been picked up are picked up and used as candidate strains for the urethane-bound green bacillus.
- the obtained candidate strain is cultured in a liquid medium containing, as a carbon source, a low-molecular-weight urethane compound (urethane compound I) obtained by reacting toluene diisocyanate with butanol.
- urethane compound I a low-molecular-weight urethane compound obtained by reacting toluene diisocyanate with butanol.
- it can be carried out by obtaining a bacterium in which the production of toluenediamine, a urethane bond hydrolysis product of urethane compound I, has been confirmed.
- the microorganism of the present invention may be any microorganism of the genus Oral dococcus having the ability to degrade a compound having a urethane bond.
- a deposit application was filed with the National Institute of Advanced Industrial Science and Technology, Patent Organism Depositary on February 26, 2003, and the deposit was submitted.
- the mycological characteristics of oral dococcus spp. Are described in Bergey's Manual of Systematic Bacteriol ogy (Vol. 1, 1984, Vol. 2, 1986). , Vol. 3, 1989, Vol. 4, 1989) '.
- microorganism of the present invention may be any of a wild-type strain and a mutant strain as long as it is a Rhodococcus bacterium capable of decomposing urethane bonds.
- Mutants can be obtained by treatment with the commonly used mutagen, ethyl methanesulfonic acid, treatment with other chemicals such as nitrosoguanidine, methyl methanesulfonic acid, ultraviolet irradiation, or no mutagen treatment. So-called natural sudden change It is also possible to obtain it for different reasons.
- the medium used to culture the microorganism belonging to the genus Oral dococcus can be used without any particular limitation as long as it can grow the microorganism belonging to the genus Oral dococcus.
- LB culture 1% tryptone, 0.5% Yeast extract, 1% NaC 1
- the medium used for growing the microorganism of the present invention specifically contains a carbon source that can be assimilated by the microorganism of the present invention, such as glucose, and a nitrogen source that can be assimilated by the microorganism of the present invention.
- an organic nitrogen source for example, peptone, meat extract, yeast extract, corn 'steep' liquor, etc.
- an inorganic nitrogen source for example, ammonium sulfate, ammonium chloride and the like.
- salts composed of cations such as sodium ion, potassium ion, calcium ion and magnesium ion and anions such as sulfate ion, chloride ion and phosphate ion
- the concentration of the carbon source is, for example, about 0.1 to 10%, and the concentration of the nitrogen source varies depending on the kind, but is, for example, about 0.01 to 5%.
- the concentration of the inorganic salts is, for example, about
- the urethane compound r that can be decomposed in the present invention may be any compound having a urethane bond in the molecular structure.
- Non-limiting examples include toluene-1,2,4-potassium dibutyl ester, toluene-2,6-dicarbamic acid dibutyl ester, methylenebisphenyldicarbamic acid dibutyl ester, hexamethylene dicarbamic acid dibutyl ester, nor Polyvinyl dicarbamic acid dibutyl ester and polypropylene using them as a raw material for synthesis are exemplified.
- Polyurethane is a general term for high molecular compounds having a urethane bond (-NHCOO-) in the molecule.
- Polyurethane is obtained by the reaction of a polyfunctional cyanate with a hydroxyl group-containing compound, and includes esters, ethers, and amides. It is a polymer having groups such as, rare and carbamates.
- a wide variety of branched or crosslinked polymers can be prepared by varying the functionality of the hydroxyl or isocyanate groups. Depending on the type of polyol used, it can be broadly classified into ester and ether.
- Polyurethane has a wide range of applications, such as elastic materials, foams, adhesives, paints, fibers, and synthetic leather, due to its excellent properties such as easy processability, rot resistance, deterioration resistance, and low specific gravity. Widely used as a product.
- the number average molecular weight of the polyurethane resin applicable in the decomposition method of the present invention is not particularly limited.
- the present invention provides a method for decomposing a compound having a urethane bond by the action of a microorganism.
- the method uses a method in which urethane bonds are decomposed and consumed as a nutrient source during the growth process of microorganisms, or a method that utilizes the effect of decomposing urethane bonds by the action of enzymes possessed by microorganisms, that is, microorganisms that have grown.
- Cells utilizing, for example, resting cells are used.
- the cells are freeze-dried by a conventional method in the form of a powder, or a tablet or the like obtained by mixing the powder with various vitamins and minerals, necessary nutrients, for example, yeast extract, casamino acid, peptone, etc.
- a preparation in the form of a form may be provided for the treatment of the urethane compound.
- the strain can also be used as a component of activated sludge and compost.
- the urethane compound to be decomposed may be added, for example, to a liquid medium as an emulsion or in the form of a powder, or may be added as a lump such as a film or a pellet.
- the amount of the urethane compound to be added to the medium is preferably from 0.01 to 10% by weight.
- the amount of microorganisms to be added may be extremely small, but is preferably 0.1% by weight or more (wet weight) based on the urethane compound in consideration of the decomposition efficiency.
- the urethane compound to be decomposed may be one kind or a plurality of kinds.
- the perylene compound may be given as a single carbon source or a single carbon source or a nitrogen source. It can be provided together with other carbon and nitrogen sources.
- the medium that can be used includes a carbon source such as a urethane compound or glucose, and a nitrogen source that can be assimilated by the microorganism of the present invention.
- the nitrogen source includes an organic nitrogen source such as peptone, meat extract, yeast extract, and the like. It can contain inorganic nitrogen sources such as corn, steep, and liquor, for example, ammonium sulfate and ammonium chloride.
- the incomparable cation such as a sodium ion, a potassium ion, a calcium ion or a magnesium ion and an anion such as a sulfate ion, a chloride ion or a phosphate ion.
- it may contain trace elements such as vitamins and nucleic acids.
- the concentration of the carbon source is, for example, about 0.1% to about 10%, and the concentration of the nitrogen source varies depending on the kind, but is, for example, about 0.01% to 5%. Ma
- the concentration of the inorganic salts is, for example, about 0.001 to 1%.
- the microorganism In the embodiment utilizing the action of decomposing the urethane bond of the enzyme possessed by the microorganism, that is, in the embodiment utilizing the microorganism cells after growth, for example, resting cells, the microorganism is not involved in the decomposition of the urethane bond. Therefore, a medium in which a urethane compound is added to a buffer solution may be used, but a nitrogen source, an inorganic salt, a vitamin, and the like may be added in addition. Examples of the buffer include a phosphate buffer.
- the time required for decomposing the urethane compound can vary depending on the type, composition, shape and amount of the urethane compound to be decomposed, the type of microorganism used, the relative amount to the urethane compound, and other various culture conditions.
- the above microorganisms when the above microorganisms are subjected to static culture, shaking culture, or aeration culture under aerobic conditions, degradation of urethane compounds is observed.
- Rotational shaking culture is preferable, and the number of rotations is preferably in the range of 30 to 250 rotations / minute.
- the culturing temperature is preferably from 10 to 50 ° C, particularly preferably around 30 ° C.
- the pH of the medium is in the range of 4 to 10, preferably around 7.
- Degradation of the urethane compound in the medium can be confirmed by, for example, measuring the weight loss of the urethane compound subjected to the decomposition, measuring the amount of the remaining urethane compound by high performance liquid chromatography (HP LC), or measuring the urethane compound hydrolyzate. Can be confirmed by measuring the production of a diamine compound. Confirmation of the formation of the diamine compound can be performed, for example, by using a diamine compound expected to be formed by thin-layer chromatography as a standard substance, or by gas chromatography.
- Nibacillus amylolyticus TB-13 strain known as an ester bond decomposing bacterium of polyester-type polyurethane (Accession No. F ERM P-19104, see Japanese Patent Application No. 2002-334162)
- Polyurethane can be completely decomposed by using the strain of the present invention having the ability to decompose urethane and Z or Commonas acid borans TB-35 strain.
- Example 1 Screening of urea-conjugated degrading bacteria
- urethane compound For the screening of degrading bacteria, the synthesized urethane compound was used (Fig. 1). These compounds include toluene diisocyanate (TDI), methylenebisphenyl diisocyanate (MDI), hexamethylene diisocyanate (HDI), and norpolene diisocyanate (NB D1). ) Is a urethane compound made by reacting butanol with five typical isocyanates used as industrial raw materials for polyurethane. All of these compounds (urethane compounds I to V, see Fig. 1) have a urethane bond in the molecule. They were solid at room temperature and insoluble in water.
- TDI toluene diisocyanate
- MDI methylenebisphenyl diisocyanate
- HDI hexamethylene diisocyanate
- NB D1 norpolene diisocyanate
- each of the inorganic salt medium shown in Table 1 was dispensed into a large test tube with an inner diameter of 22 mm, and urethane compounds of urethane compounds I to V were used as carbon sources. After adding about 0.1 g of each, sterilized with 121 for 20 minutes was used as a screening medium. All the reagents used for the preparation of the culture medium were of a special grade manufactured by Wako Pure Chemical Industries, Ltd. or equivalent.
- the screening source was 350 samples of soil collected from all over Japan. A total of 250 test tubes were used, 50 for each urethane compound I-V. A soil sample obtained by mixing 20 soil samples was added in an amount of 0.2 g per test tube containing the above-mentioned screening medium. This was cultured at 30 ° C. with shaking at 125 osc / min, and 0.5 ml of the supernatant was transferred to a new screening medium every week. After repeating this procedure three times, the culture supernatant was diluted with physiological saline for 26 test tube samples in which turbidity and discoloration were observed in the culture solution, and applied on NB plate medium. After cultivation for 1 to 3 days-The growing colonies were picked up one by one.
- This strain is a gram-positive coryneform bacterium, has no motility and has no sporulation. This bacterium formed a white semi-liquid colony having a very high water content.
- the oxidase test was negative, the catalase test was positive, and the OF test was negative.
- Table 2 Bacteriological properties of urethane-degrading bacteria TB-60 strain
- this strain was identified as Rhodococcus segui with a 95% probability. No other strains with a similarity of more than 50% were found.
- Figure 2 shows the phylogenetic tree of known bacterial species determined from the sequence.
- Rhodococcus esqueii TB-60 strain obtained as a urethane compound degrading bacterium was used.
- the amount of bacterial growth was determined by the culture medium at 0. D. 66 . Was measured with an absorbance meter. The absorbance was measured using an absorbance meter V-550 manufactured by JASCO Engineering Corporation.
- the residual amount of urethane compound I was measured by high performance liquid chromatography (HPLC). Add 2 ml of acetonitrile to the culture, stir well, allow to stand for 20 minutes, transfer the supernatant to a microtube, eccentric at 12,000 rpm and 4 ° C, and further transfer the supernatant to a volume of 2 ml. Each sample was transferred to a vial and subjected to HP LC as a sample. The analysis was carried out using TSK-GEL ODS-80 TM mm x 15 cm manufactured by Tosoh Corporation, 70% acetonitrile as the mobile phase, and a flow rate of 0.6 m 1 / min. UV (240 nm) was used as the detector.
- the amount of toluenediamine produced by the decomposition of the urethane bond was quantified by gas chromatography (GC). After completion of the culture, 0.5 ml of the culture supernatant was transferred to a microtube, and 0.5 ml of an ethyl acetate solution containing 100 ppm of diphenylamine was added as an internal standard substance, and the mixture was stirred well for 10 minutes. After centrifugation at 12,000 rpm and 4 ° C, the upper layer was transferred to a new microtube, and about 21 mg of anhydrous sodium sulfate was added to remove water, and each sample was subjected to GC. .
- GC gas chromatography
- FIG. 3 shows the measurement results of the residual amount of the compound I under each culture condition. ⁇ ⁇ In the system fed with urethane compound I as a carbon source, about 60% of urethane compound I was reduced on the 10th day of culture. On the other hand, in the medium supplied as a carbon / nitrogen source, a decrease in urethane compound I was observed, but the decrease was small.
- FIG. 4 shows the measurement results of the amount of diamine produced.
- urethan compound I as a carbon source
- Fig. 5 shows the measurement results of the bacterial cell growth amount. ⁇
- remarkable growth was observed at the beginning of culture.
- moderate growth was observed even after the third day.
- the strain is a bacterium, and it is generally useful in terms of cost for microbial degradation because bacteria can be easily cultured on a large scale.
- Complete co-existence of the microorganism of the present invention with the bacteria of the present invention such as the strains of vanilla Bacillus amylolyticus TB-13 or Comamonas acidborans TB-35, which are ester bond-decomposing bacteria in urethane, makes it possible to completely degrade polyurethane by bacteria. It becomes possible.
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Abstract
Description
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Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/538,014 US7547537B2 (en) | 2003-03-03 | 2004-03-03 | Urethane-bond-degrading bacteria |
CA 2517520 CA2517520C (en) | 2003-03-03 | 2004-03-03 | Method for biodegrading urethane bonds using rhodococcus bacteria |
DE200460030438 DE602004030438D1 (de) | 2003-03-03 | 2004-03-03 | Neuartiger, zur spaltung der urethanbindung fähiger bacterie |
EP20040716739 EP1621608B1 (en) | 2003-03-03 | 2004-03-03 | Novel bacteria capable of breaking urethane bond |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003055421A JP4062520B2 (ja) | 2003-03-03 | 2003-03-03 | 新規ウレタン結合分解菌 |
JP2003-055421 | 2003-03-03 |
Publications (1)
Publication Number | Publication Date |
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WO2004078952A1 true WO2004078952A1 (ja) | 2004-09-16 |
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ID=32958662
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/JP2004/002691 WO2004078952A1 (ja) | 2003-03-03 | 2004-03-03 | 新規ウレタン結合分解菌 |
Country Status (7)
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US (1) | US7547537B2 (ja) |
EP (1) | EP1621608B1 (ja) |
JP (1) | JP4062520B2 (ja) |
CN (1) | CN100338210C (ja) |
CA (1) | CA2517520C (ja) |
DE (1) | DE602004030438D1 (ja) |
WO (1) | WO2004078952A1 (ja) |
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JP2006055005A (ja) * | 2004-08-17 | 2006-03-02 | Japan Science & Technology Agency | 新規ウレタナーゼ遺伝子 |
CN103820360B (zh) * | 2014-01-16 | 2016-04-20 | 南京农业大学 | 一株可有效降解炔苯酰草胺的降解菌及其应用 |
CN104327300A (zh) * | 2014-11-10 | 2015-02-04 | 镇江中化聚氨酯工业设备有限公司 | 聚氨酯废弃物的碱解加工工艺 |
WO2020064776A1 (en) * | 2018-09-24 | 2020-04-02 | Repsol S.A. | Biodegradation of polyether-based polyurethane and use thereof for the production of amino acids |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH09192633A (ja) * | 1995-05-15 | 1997-07-29 | Rengo Co Ltd | ウレタン化合物の分解方法および該化合物を分解する菌 |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
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FR2766478B1 (fr) * | 1997-07-23 | 1999-09-03 | Inst Francais Du Petrole | Procede de traitement bacterien d'effluents contenant de l'ethyl-tert-butyl ether |
CN1146613C (zh) * | 1999-09-10 | 2004-04-21 | 三井化学株式会社 | 可降解的聚氨酯树脂 |
CN1128874C (zh) * | 2000-11-17 | 2003-11-26 | 中国科学院上海有机化学研究所 | 一种红球菌sp.D12及其培养方法和用途 |
-
2003
- 2003-03-03 JP JP2003055421A patent/JP4062520B2/ja not_active Expired - Fee Related
-
2004
- 2004-03-03 US US10/538,014 patent/US7547537B2/en not_active Expired - Fee Related
- 2004-03-03 CA CA 2517520 patent/CA2517520C/en not_active Expired - Fee Related
- 2004-03-03 DE DE200460030438 patent/DE602004030438D1/de not_active Expired - Lifetime
- 2004-03-03 EP EP20040716739 patent/EP1621608B1/en not_active Expired - Fee Related
- 2004-03-03 WO PCT/JP2004/002691 patent/WO2004078952A1/ja active Application Filing
- 2004-03-03 CN CNB2004800018673A patent/CN100338210C/zh not_active Expired - Fee Related
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH09192633A (ja) * | 1995-05-15 | 1997-07-29 | Rengo Co Ltd | ウレタン化合物の分解方法および該化合物を分解する菌 |
Non-Patent Citations (4)
Title |
---|
ADACHI YUSUKE ET AL.: "Urethane ketsugo setsudanno o yusuru biseibutsu no tansaku", JAPAN SOCIETY FOR BIOSCIENCE, BIOTECHNOLOGY, AND AGROCHEMISTRY 2003 NENDO (HEISEI 15 NENDO) TAIKAI KOEN YOSHOSHU, no. 3B02P15, 5 March 2003 (2003-03-05), pages 234, XP002904085 * |
JANSEN B. ET AL.: "Evidence for degradation of synthetic polyurethanes by staphylococcus epidermidis", ZENTRALBL. BAKTERIOL., vol. 276, no. 1, 1991, pages 36 - 45, XP008040098 * |
NAKAJIMA-KAMBE T. ET AL.: "Isolation and characterization of a bacterium which utilizes polyester polyurethane as a sole carbon and nitrogen source", FEMS MICROBIOL. LETT., vol. 129, 1995, pages 39 - 42, XP002903685 * |
SHIGENO (AKUTSU) YUKIE ET AL.: "Polyurethane no biseibutsu bunkai kotai plastic bunkai koso no komyo na senryaku", BIOSCIENCE & INDUSTRY, vol. 60, no. 3, 11 March 2002 (2002-03-11), pages 153 - 158, XP002904086 * |
Also Published As
Publication number | Publication date |
---|---|
JP4062520B2 (ja) | 2008-03-19 |
EP1621608A1 (en) | 2006-02-01 |
CA2517520C (en) | 2010-04-20 |
US20070099285A1 (en) | 2007-05-03 |
DE602004030438D1 (de) | 2011-01-20 |
EP1621608A4 (en) | 2006-06-21 |
CA2517520A1 (en) | 2004-09-16 |
JP2004261103A (ja) | 2004-09-24 |
CN100338210C (zh) | 2007-09-19 |
EP1621608B1 (en) | 2010-12-08 |
CN1723276A (zh) | 2006-01-18 |
US7547537B2 (en) | 2009-06-16 |
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