WO1981000417A1 - Process for preparing pectin from vegetable tissue - Google Patents
Process for preparing pectin from vegetable tissue Download PDFInfo
- Publication number
- WO1981000417A1 WO1981000417A1 PCT/JP1980/000179 JP8000179W WO8100417A1 WO 1981000417 A1 WO1981000417 A1 WO 1981000417A1 JP 8000179 W JP8000179 W JP 8000179W WO 8100417 A1 WO8100417 A1 WO 8100417A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- pectin
- candida
- genus
- mysess
- saccharo
- Prior art date
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08B—POLYSACCHARIDES; DERIVATIVES THEREOF
- C08B37/00—Preparation of polysaccharides not provided for in groups C08B1/00 - C08B35/00; Derivatives thereof
- C08B37/0006—Homoglycans, i.e. polysaccharides having a main chain consisting of one single sugar, e.g. colominic acid
- C08B37/0045—Homoglycans, i.e. polysaccharides having a main chain consisting of one single sugar, e.g. colominic acid alpha-D-Galacturonans, e.g. methyl ester of (alpha-1,4)-linked D-galacturonic acid units, i.e. pectin, or hydrolysis product of methyl ester of alpha-1,4-linked D-galacturonic acid units, i.e. pectinic acid; Derivatives thereof
-
- 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
- C12N1/14—Fungi; Culture media therefor
- C12N1/145—Fungal isolates
-
- 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
- C12N1/14—Fungi; Culture media therefor
- C12N1/16—Yeasts; Culture media therefor
-
- 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
- C12N1/14—Fungi; Culture media therefor
- C12N1/16—Yeasts; Culture media therefor
- C12N1/165—Yeast isolates
-
- 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
- C12N1/14—Fungi; Culture media therefor
- C12N1/16—Yeasts; Culture media therefor
- C12N1/18—Baker's yeast; Brewer's yeast
- C12N1/185—Saccharomyces isolates
-
- 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
- C12R2001/645—Fungi ; Processes using fungi
-
- 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
- C12R2001/645—Fungi ; Processes using fungi
- C12R2001/72—Candida
-
- 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
- C12R2001/645—Fungi ; Processes using fungi
- C12R2001/78—Hansenula
-
- 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
- C12R2001/645—Fungi ; Processes using fungi
- C12R2001/84—Pichia
-
- 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
- C12R2001/645—Fungi ; Processes using fungi
- C12R2001/85—Saccharomyces
-
- 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
- C12R2001/645—Fungi ; Processes using fungi
- C12R2001/88—Torulopsis
-
- 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S435/00—Chemistry: molecular biology and microbiology
- Y10S435/8215—Microorganisms
- Y10S435/911—Microorganisms using fungi
Definitions
- the present invention relates to a useful method for isolating pectin from plant tissue using a specific yeast.
- Pectin is a useful polysaccharide used as a raw material for foods, pharmaceuticals, and cosmetics, and is contained in higher plants in a high content.
- the production of pectin has been carried out by heat-extracting pectin-containing plant tissue in the presence of a chelating agent and an acid.
- a chelating agent and an acid have been carried out.
- isolation of pectin is difficult, and there is a problem in treating the residue.
- the present inventors have repeated research on a method for producing pectin under mild conditions instead of the conventional chemical method as described above, and firstly, Tricosporone belonging to the genus Tricosporon. It has been found that an enzyme that releases pectin from tissues of various types of plants can be produced without destroying the tissues from the tissues. No. 70495).
- the present invention is a further development of the present invention, and has found that various types of yeast have an activity of releasing + from pectin-containing plant tissues, thereby completing the present invention.
- the genus Endomyces the genus Endomycopsis, the genus Saccharomyces, the genus Schizosaccharomyces, the genus Pichia, the genus Nsenura, the deno, the lioness A plant belonging to the genus Essence, Sensena spora, Tonorelobis, Candida or Kluybium myces
- ⁇ It is characterized in that a microorganism having the activity of releasing pectin from a tissue, or a culture solution or a processed product thereof is applied to a plant tissue containing pectin, and pectin is released from the tissue and collected. And a method for producing the pectin.
- the microorganism used in the present invention belongs to yeast, and is included in any of spore-forming yeast and aspore-free yeast. If you give the kiyoshi, it is ⁇ > o
- Endomycopsis capsular is, Endomycopsis.
- Saccharomyces Saccharomyces
- Saccharomyces Saccharomyces
- Pichia As belonging to the genus Pichia (! Picliia :), Pichia's Orientalis (; Pichia orientalis), Pichia poly monoref (Picia OMPI WIPO) Pichia farinosa (Pichia farinosa)
- Hansenula saturnus As a member of the genus Hansenula, Hansenula saturnus (Hansenula saturnus) is a member of the genus Hansenula.
- Debaryomyces essensenii As a member of the genus Debaryomyces, Debaryomyces essensenii, is a member of the genus Debaryomyces, and is a member of the genus Debaryomyces essensen.
- the members belonging to the genus Torulopsis include those belonging to the genus Candida: Torulopsis pinus, and those belonging to the Torulopsis pinus. These include Candida krusei, Candida glaebosa, Candida macedoniensis;
- Kluyveromyces It belongs to the genus Kluyveromyces, and includes Kluyveromyces fra-gilis, Kluyveromyces lactis. Kluyvero-myces marxianus), Knoray ⁇ ! Bello Myces * Toroso Fira Norem
- strains similar to these strains J refers to those having a pectin-releasing property and similar mycological properties. "These mutants” refer to the strains specifically described. Bacteria similar thereto include those artificially mutated by chemical or physical means and those naturally mutated. As a means for artificially mutating, those known in the art can be used.
- a microorganism belonging to yeast contains an enzyme capable of releasing pectin, and the bacterium contained in each of the above genera contains an enzyme which may be a new strain. As long as this invention is included.
- the above microorganism is directly inoculated into a plant tissue to be treated, and then allowed to stand, stirred, shake-cultured, or the like according to the usual method, or A culture solution obtained by raw culture or a processed product thereof can act on the plant tissue.
- the medium used is not particularly limited, and any medium to which various nutrients commonly used for ordinary yeast culture are added can be used. Common media include peptone, casein hydrolysate, yeast kiss, boudose, or, in some cases, inorganic salts such as phosphate, magnesium, and gallium salts. Salts can also be added appropriately.
- a seed culture medium some plant tissues can be used without heat and without the addition of any nutrient source by merely sterilizing them by heat. In particular
- the culture conditions of the microorganisms in the above medium are appropriately determined so as to maximize the production of the target enzyme, and the culture is usually performed for 20 to 37 hours for 10 to 50 hours.
- the culture may be any of shaking, standing, aeration and agitation, or solid culture. By such culturing, the cells grow and the enzyme is produced outside the cells.
- the culture solution can be used as it is or as a processed product such as a concentrate or a purified enzyme solution. This concentrate can be obtained by evaporating the water under low temperature and low pressure or enriching with an ultrafiltration membrane, if necessary, if the culture solution that has been subjected to filtration is cooled under mild conditions.
- the purified enzyme solution may be passed through a culture solution to be concentrated and then subjected to fractional precipitation by addition of ammonium sulfate, or may be passed through the culture solution, and the CM-sephadex adsorption / desorption column chromatograph may be used. And Sephadex G-75 gel.
- the mechanism of action in the method of the present invention is such that enzymes produced from yeast infiltrate into plant tissue, act on pectic substances, particularly water-insoluble proteins, to produce water-soluble pectin, It is considered to be released outside the plant tissue.
- Vectin released from plant tissue by the method of the present invention can be isolated by a usual method.
- the treatment solution prepared as above is filtered, the residue is removed, and then an S-fold volume of an organic solvent miscible with water, for example, ethanol is added, whereby the actin coagulates. I do.
- This is collected, washed with the same organic solvent as above, e.g., ethanol, and dried to obtain high-purity pectin.
- Pectin thus obtained was isolated using any of the yeasts. Also had a molecular weight of 100,000 or more.
- this vectin has a narrow molecular weight distribution and is close to natural.
- this vectin is free of chemicals and is preferred for use as food and medicine. Note that the properties of the obtained pectin vary slightly depending on the type of raw material.
- the present invention relates to a method for simply obtaining high-yield, high-purity pectin from a plant tissue using a living organism belonging to yeast. This is a characteristic method that can be used for removing pectin or for producing an extract of a plant containing pectin.
- plant tissues to be treated in the present invention are not particularly limited, and those having a low price and a high pectin content are preferable.
- Implementation Kiyoshi 1 1.
- Example 1 The various strains used in Example 1 were cultured under the same conditions except that the culture conditions were extended to 36 rubs. Each culture solution obtained after culturing
- Knoley veromyces manolexianus (Eluyveronn cesma-rxianus) IFO 0277 was cultured according to ⁇ 1 and various plant tissues 100 ⁇ were added to the culture solution 100 and reacted for 3 hours. After that, the cells were treated according to the execution decision 1 to obtain Pectin. The yield is shown in Table 3. Implementation ⁇ 4.
- the treatment liquid obtained by applying Endoinycops is capsularis IFO 0672 to the pericarp of oranges is passed through, and the volume of the liquid is reduced to 3%.
- Pectin was precipitated by adding twice the amount of ethanol. This was collected, washed well with ethanol, and dried to obtain pectin having the properties shown in Table 4.
- Candida mac edoni ens is AEU 4587 0.7
- Debary omyc es cast elli i I FO 1359 0.5
- Endomy ce s lindneri AKX5 4206 0.8 Hans enia spor a valbyens is I! FO 0115 5.0
- Kluyveromyces la ct is F0 1090 4.0
- Endomy c ops is capsulari s IFO 0672 7.5
- Endomy cops is Ma ernalis AKU 4210 0.5 Table 2. Extraction of pectin from the pericarp of summer oranges
- Outer peel 1.8 Inner peel 1.2 cans Citrus na t s uda i dai)
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Mycology (AREA)
- Zoology (AREA)
- Biotechnology (AREA)
- Wood Science & Technology (AREA)
- Genetics & Genomics (AREA)
- Bioinformatics & Cheminformatics (AREA)
- Biochemistry (AREA)
- Medicinal Chemistry (AREA)
- General Health & Medical Sciences (AREA)
- Botany (AREA)
- Tropical Medicine & Parasitology (AREA)
- Virology (AREA)
- Biomedical Technology (AREA)
- Microbiology (AREA)
- General Engineering & Computer Science (AREA)
- Polymers & Plastics (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Molecular Biology (AREA)
- Preparation Of Compounds By Using Micro-Organisms (AREA)
- Polysaccharides And Polysaccharide Derivatives (AREA)
- Coloring Foods And Improving Nutritive Qualities (AREA)
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19803049773 DE3049773C2 (de) | 1979-08-10 | 1980-08-08 | Verfahren zur Herstellung von Pektin aus Pflanzengeweben |
DK151581A DK156666C (da) | 1979-08-10 | 1981-04-02 | Fremgangsmaade til fremstilling af pectin fra plantevaev |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10238979A JPS5626901A (en) | 1979-08-10 | 1979-08-10 | Preparation of pectin from plant tissue |
JP79/102389 | 1979-08-10 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1981000417A1 true WO1981000417A1 (en) | 1981-02-19 |
Family
ID=14326085
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP1980/000179 WO1981000417A1 (en) | 1979-08-10 | 1980-08-08 | Process for preparing pectin from vegetable tissue |
Country Status (8)
Country | Link |
---|---|
US (1) | US4686187A (ja) |
EP (1) | EP0033349B1 (ja) |
JP (1) | JPS5626901A (ja) |
CH (1) | CH645408A5 (ja) |
DE (1) | DE3049773C2 (ja) |
DK (1) | DK156666C (ja) |
GB (1) | GB2072210B (ja) |
WO (1) | WO1981000417A1 (ja) |
Families Citing this family (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CA1334290C (en) * | 1987-02-26 | 1995-02-07 | Adrienne Elizabeth Clarke | Plant gum material and use thereof in food products |
JPH068322B2 (ja) * | 1987-02-28 | 1994-02-02 | 拓夫 坂井 | ペクチンの製造法 |
US5413783A (en) * | 1988-04-04 | 1995-05-09 | The United States Of America As Represented By The Secretary Of Agriculture | Inhibiting plant pathogens with an antagonistic microorganism(s) |
US5780023A (en) * | 1988-04-04 | 1998-07-14 | The United States Of America As Represented By The Secretary Of Agriculture | Inhibiting plant pathogens with an antagonistic microorganism(s) |
US6500425B1 (en) | 1988-04-04 | 2002-12-31 | The United States Of America As Represented By The Secretary Of Agriculture | Inhibiting plant pathogens with an antagonistic microorganism(s) |
DE4018392A1 (de) * | 1990-06-08 | 1991-12-12 | Kaysan Rolf Dipl Kaufm | Verfahren zur gewinnung von pflanzen-hydrolysaten insbesondere fuer biokosmetische und pharmazeutische zwecke |
EP0868854A3 (en) * | 1992-01-20 | 1999-05-12 | Japan Tobacco Inc. | Low-molecular pectin, and food and drink which contain low-molecular pectin |
US5236833A (en) * | 1992-03-17 | 1993-08-17 | Nestec S.A. | Diacetyl production |
DE4313549C1 (de) * | 1993-04-26 | 1994-10-13 | Herbstreith & Fox Kg Pektin Fa | Verfahren zur Gewinnung von Pektin-Extrakt aus Zuckerrüben und dessen Verwendung |
US6271001B1 (en) | 1995-03-23 | 2001-08-07 | Bio Polymers Pty. Ltd. | Cultured plant cell gums for food, pharmaceutical, cosmetic and industrial applications |
US6953586B1 (en) | 2000-06-08 | 2005-10-11 | Ivy Animal Health, Inc. | Growth promoting pharmaceutical implant |
DE10159554B4 (de) * | 2001-12-05 | 2004-12-30 | Ecoenergy Gesellschaft Für Energie- Und Umwelttechnik Mbh | Verfahren zur Konfektionierung von Pektin-Filter- bzw. -presskuchen vor der Trocknung |
EP1877448A2 (en) * | 2005-03-09 | 2008-01-16 | Cargill, Incorporated | Process for obtaining pectin |
ZA200700473B (en) * | 2006-01-16 | 2009-08-26 | Reliance Life Sciences Pvt Ltd | Process for increased patchulol content in essential oil of pogostemon cablin |
WO2013141723A1 (en) | 2012-03-22 | 2013-09-26 | Taboada Evelyn | Preparation of pectin and polyphenolic compositions from mango peels |
CN103265647A (zh) * | 2013-05-14 | 2013-08-28 | 安徽金枫果胶有限公司 | 从马铃薯废渣中提取果胶的方法 |
WO2019048715A2 (en) | 2018-01-16 | 2019-03-14 | Cp Kelco Aps | COMPOSITIONS CONTAINING A BIOMASS COMPOSITION CONTAINING ACTIVATED PECTIN, AND METHODS FOR PREPARING SUCH COMPOSITIONS |
CN109337790B (zh) * | 2018-09-30 | 2022-04-12 | 广西壮族自治区中国科学院广西植物研究所 | 以富含果胶的水果为原料同时制备水果原醋和果胶的方法 |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5470495A (en) * | 1977-11-10 | 1979-06-06 | Takuo Sakai | Preparation of pectine |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1513615A (en) * | 1921-04-26 | 1924-10-28 | Hazel Mary Leo | Dry-powder jelly base containing pectin |
US2387635A (en) * | 1945-02-24 | 1945-10-23 | Fruit Growers Exchange Ca | Method for the preparation of pectin |
US2754214A (en) * | 1953-11-24 | 1956-07-10 | Leo Herbert Thal | Pectinic acid product and method of making the same |
US3063911A (en) * | 1961-04-03 | 1962-11-13 | Taisho Pharmaceutical Co Ltd | Acid-stable digestive enzyme preparation and process of making same |
-
1979
- 1979-08-10 JP JP10238979A patent/JPS5626901A/ja active Granted
-
1980
- 1980-08-08 DE DE19803049773 patent/DE3049773C2/de not_active Expired
- 1980-08-08 WO PCT/JP1980/000179 patent/WO1981000417A1/ja active IP Right Grant
- 1980-08-08 US US06/253,929 patent/US4686187A/en not_active Expired - Lifetime
- 1980-08-08 CH CH223181A patent/CH645408A5/de not_active IP Right Cessation
- 1980-08-08 GB GB8109417A patent/GB2072210B/en not_active Expired
-
1981
- 1981-02-24 EP EP80901488A patent/EP0033349B1/en not_active Expired
- 1981-04-02 DK DK151581A patent/DK156666C/da not_active IP Right Cessation
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5470495A (en) * | 1977-11-10 | 1979-06-06 | Takuo Sakai | Preparation of pectine |
Non-Patent Citations (1)
Title |
---|
See also references of EP0033349A4 * |
Also Published As
Publication number | Publication date |
---|---|
EP0033349A1 (en) | 1981-08-12 |
GB2072210A (en) | 1981-09-30 |
GB2072210B (en) | 1983-05-18 |
DE3049773T1 (de) | 1982-02-25 |
US4686187A (en) | 1987-08-11 |
DK156666C (da) | 1990-02-05 |
EP0033349A4 (en) | 1982-05-10 |
CH645408A5 (de) | 1984-09-28 |
DE3049773C2 (de) | 1987-10-22 |
EP0033349B1 (en) | 1984-05-02 |
DK151581A (da) | 1981-04-02 |
JPS5626901A (en) | 1981-03-16 |
JPS6150961B2 (ja) | 1986-11-06 |
DK156666B (da) | 1989-09-18 |
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