EP1902069A1 - Stabile hemicellulose-paste, verfahren zu deren herstellung und deren verwendung - Google Patents
Stabile hemicellulose-paste, verfahren zu deren herstellung und deren verwendungInfo
- Publication number
- EP1902069A1 EP1902069A1 EP06743120A EP06743120A EP1902069A1 EP 1902069 A1 EP1902069 A1 EP 1902069A1 EP 06743120 A EP06743120 A EP 06743120A EP 06743120 A EP06743120 A EP 06743120A EP 1902069 A1 EP1902069 A1 EP 1902069A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- paste
- hemicellulose
- stable
- containing material
- alkaline
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
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
- C08B37/0057—Homoglycans, i.e. polysaccharides having a main chain consisting of one single sugar, e.g. colominic acid beta-D-Xylans, i.e. xylosaccharide, e.g. arabinoxylan, arabinofuronan, pentosans; (beta-1,3)(beta-1,4)-D-Xylans, e.g. rhodymenans; Hemicellulose; Derivatives thereof
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23L—FOODS, FOODSTUFFS OR NON-ALCOHOLIC BEVERAGES, NOT OTHERWISE PROVIDED FOR; PREPARATION OR TREATMENT THEREOF
- A23L29/00—Foods or foodstuffs containing additives; Preparation or treatment thereof
- A23L29/20—Foods or foodstuffs containing additives; Preparation or treatment thereof containing gelling or thickening agents
- A23L29/206—Foods or foodstuffs containing additives; Preparation or treatment thereof containing gelling or thickening agents of vegetable origin
- A23L29/262—Cellulose; Derivatives thereof, e.g. ethers
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23L—FOODS, FOODSTUFFS OR NON-ALCOHOLIC BEVERAGES, NOT OTHERWISE PROVIDED FOR; PREPARATION OR TREATMENT THEREOF
- A23L33/00—Modifying nutritive qualities of foods; Dietetic products; Preparation or treatment thereof
- A23L33/20—Reducing nutritive value; Dietetic products with reduced nutritive value
- A23L33/21—Addition of substantially indigestible substances, e.g. dietary fibres
- A23L33/24—Cellulose or derivatives thereof
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K47/00—Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient
- A61K47/30—Macromolecular organic or inorganic compounds, e.g. inorganic polyphosphates
- A61K47/36—Polysaccharides; Derivatives thereof, e.g. gums, starch, alginate, dextrin, hyaluronic acid, chitosan, inulin, agar or pectin
- A61K47/38—Cellulose; Derivatives thereof
-
- 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
- C08B37/006—Heteroglycans, i.e. polysaccharides having more than one sugar residue in the main chain in either alternating or less regular sequence; Gellans; Succinoglycans; Arabinogalactans; Tragacanth or gum tragacanth or traganth from Astragalus; Gum Karaya from Sterculia urens; Gum Ghatti from Anogeissus latifolia; Derivatives thereof
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L5/00—Compositions of polysaccharides or of their derivatives not provided for in groups C08L1/00 or C08L3/00
- C08L5/14—Hemicellulose; Derivatives thereof
Definitions
- the invention relates to a stable uncrosslinked hemicellulose paste.
- This paste according to the invention is prepared by treating hemicellulose in alkaline medium with the addition of an oxidizing agent with subsequent precipitation and separation of excess liquid.
- the novel pastes are used in the field of food and nutritional supplements.
- hemicelluloses are one of the three structural components of the woody cell wall.
- Hemicellulose generally refers to a group of polysaccharides of different composition which are present in plant fibers and cell walls of grasses and cereals and have a significantly lower degree of polymerisation than cellulose.
- the monomers are hexoses (eg Galactose, glucose, mannose) and pentoses (eg arabinose, xylose). Accordingly, hemicelluloses are also classified into hexosans and pentosans.
- Xylan is the predominant hemicellulose component in the remainder of annual plants, for example in oat hulls, in a proportion of 35 to 40% of the total mass.
- aqueous extracts of various types of hemicelluloses can form gels or hydrogels when treated with certain oxidizing reagents. This process is also referred to as oxidative gelation.
- oxidative gelation In the literature, there are most studies on the gelation of wheat and rye flour extracts. The biochemical principles of the gel formation process in biopolymers are not fully described yet, but there are a number of models (Hoseney, Faubion (1981) A mechanism for the oxidative gelation of wheat flour-soluble pentosans, Cereal Chemistry 58, 421-424). It is assumed that a gel becomes involved in the intramolecular and / or intermolecular crosslinking of arabinoxylan and proteins, for example by means of ferulic acid (4). Hydroxy-3-methoxy-cinnamic acid) or ferulic acid derivatives.
- hydrogel formation of hemin cellulose is the addition of further biopolymers, eg of different amounts of chitosan, in Gabrielii Gatenholm, Glasser, Jain, Kenne (2000) Separation, Characterization and hydrogelformation of hemicellulose from aspen wood, Carbohydrate polymers 43, 367-374. Gelation takes place here in a strongly acidic medium at 95 ° C.
- Another model of gelation or viscosity increase of aqueous extracts of biopolymers is based on the crosslinking of macromolecular components of hemicellulose, which are caused by oxidative coupling of the existing ferulic acid residues.
- the crosslinking is initiated by appropriate oxidizing agents and enzymes.
- oxidizing reagents which cause gel formation in biopolymers.
- Such reagents are e.g. Hydrogen peroxide, usually in combination with an enzyme (peroxidase), ammonium persulfate and formamidine disulfate.
- both the water-soluble and the water-insoluble pentose fractions of various cereal flours can be processed into gels (Michniewicz et al. (1990), Cereal Chemistry 67, 434-439).
- the oxidative gelation of hexoses with enzymes has been known for some time (FR 2545101).
- a gel is prepared from a pectin-containing solution obtained from sugar beets, by oxidation, for example with hydrogen peroxide, and the use of enzymes, for example peroxidase.
- a process for producing a stable and uncrosslinked hemicellulose paste comprising the following steps:
- paste means both a viscous mass of one or more components and a paste with gel-like properties, in particular yield point.
- a particular feature of the present invention is that there is no crosslinking of the hemicellulose, as is the case in the prior art. This is because there are essentially no crosslinkable components, such as e.g. Ferulic acids and their derivatives. This was demonstrated by studies of oat hulls used as starting material.
- the samples preferably contained not more than 0.1 wt .-%, more preferably not more than 0.05 wt .-%, crosslinkable components, after washing and grinding only a maximum of 0.01 wt .-%. This content of crosslinkable components, i.
- the pastes according to the invention are free of crosslinkable components, such as e.g. Ferulic acids.
- the preparation according to the invention of the hemicellulose paste preferably takes place from protein-poor to protein-free xylan, as is the case during extraction, eg from oat-husks.
- An elaborate workup, such as solvent exchange., Drying or the like is not necessary here.
- the alkaline extraction is carried out in an aqueous-alkaline medium.
- a 0.5 to 8% alkaline solution and a treatment temperature between 50 and 90 0 C has proven to be particularly advantageous.
- the preparation of the paste is carried out under mild alkaline conditions with the addition of an oxidizing agent, but no enzyme such. Peroxidase, is required.
- Hydrogen peroxide, sodium peroxide, potassium peroxide, ozone or oxygen are preferably used as the oxidizing agent. Also included in this group are hydrogen peroxide anions, hydrogen peroxide radicals, hydroxyl radicals, oxygen radicals, as well as sodium hypochlorite, chlorine or chlorine dioxide, which under alkaline conditions can produce the chloromium ion and protonated hypochlorous acid as oxidizing species.
- the addition of the oxidizing agent can be carried out in several portions over a longer period, depending on the conditions and batch size. Has proven particularly useful a procedure with two portions, before the addition of the last portion again 1 to 3 hours to ensure good mixing while maintaining the reaction temperature.
- the precipitation of the hemicellulose from the alkaline solution is possible by adjusting the pH to a range of 4.0 to 9.5.
- a solids content of 15 to 50 wt .-% of the paste can be obtained.
- a subsequent adjustment of the dry content e.g. by mixing the hemicellulose paste with distilled water, readily possible.
- the xylan paste makes it possible to adjust the pH in a wide range, which is particularly suitable for use as a cosmetic and / or pharmaceutical product, e.g. as a skin care product, could be beneficial.
- the xylan paste is again dispersed in a mixture of hydrogen peroxide, water and methanol, and the mixture is brought to the desired pH with dilute alkali metal hydroxide (Example 2).
- the adjustment of the dry content can be carried out again by centrifugation but also by drying, e.g. in a vacuum drying cabinet, followed by mixing the paste with distilled water to adjust the dry content.
- gel-forming biopolymers such as chitosan
- chitosan is not necessary, but generally possible, should that be required for certain applications.
- the product is miscible with both hydrophilic and hydrophobic substances.
- the absorption capacity of water, alcohols and / or food oils or additives such as olive oil, sunflower oil, other animal and plant oils and fats or even glycerine, while retaining the paste-like structure, as extremely high, which enables the versatile use of the paste in foods, cosmetics or pharmaceutical products.
- a stable paste containing at least one hemicellulose obtained by alkaline extraction and at least one liquid dispersion medium, wherein the at least one hemicellulose does not contain crosslinking substances, e.g. Ferulic acid.
- xylan composed of both vegetable fibers, e.g. from annual plants, in particular oats, as well as from wood fibers, e.g. from Buchen, was isolated.
- the bright almost white color of the paste offers an application in combination with other pastes, gels, hydrogels, creams and the like. almost on.
- the hemicellulose used in the invention has a high water retention capacity. This makes it possible, while maintaining the paste-like structure, to prepare a hemicellular paste with different dry contents, which ultimately also permits the setting of different viscosities.
- the paste with gel-like properties shows very good processing properties.
- the solvents which can be used in the preparation of the paste are not critical for the environment and do not pose a health hazard.
- water can be used without problem as a cleaning agent, so that a simple and inexpensive disposal of this cleaning agent is possible.
- the paste according to the invention is also umweit- and person-friendly under the aspect of cleaning and disposal.
- Fig.l shows a diagram of the frequency sweep of a paste according to the invention.
- Fig. 2 shows a diagram of the molecular weight distribution of the paste according to the invention in comparison to the starting hemicellulose.
- Fig. 1 the viscosity behavior of the paste according to the invention is illustrated by a diagram.
- G 1 represents the storage modulus and G "represents the loss modulus. It can be seen from the diagram that the storage modulus G 1 is greater than the loss modulus G", which corresponds to the behavior of a gel.
- the paste according to the invention shows an increase of the modules with increasing frequency, which is untypical for a gel. On the basis of these investigations, it is thus proved that in the present case it is a paste and not a gel, as is known from the prior art.
- a pH of about 8 was adjusted to 50% (v / v) aqueous acetic acid, resulting in precipitation of the xylene product. Then, by adding an aqueous citric acid solution, the pH was lowered to 4.5. To separate off the product, it was first centrifuged at 15,000 rpm for 45 minutes. After the decantation of the supernatant was 30 min at
- the pH was lowered to 4.5 by adding an aqueous citric acid solution.
- the product was separated on a frit and washed with MeOH / H 2 O (90/10 v / v), MeOH and finally with acetone and dried at 40 C in a vacuum oven (75 mbar).
- Example 5 1 g of the dry product prepared according to Example 1 were mixed with 1 ml of sunflower oil, resulting in a homogeneous dimensionally stable paste with a creamy consistency.
- Example 5 1 g of the dry product prepared according to Example 1 were mixed with 1 ml of sunflower oil, resulting in a homogeneous dimensionally stable paste with a creamy consistency.
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Polymers & Plastics (AREA)
- Medicinal Chemistry (AREA)
- Engineering & Computer Science (AREA)
- General Health & Medical Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Molecular Biology (AREA)
- Materials Engineering (AREA)
- Nutrition Science (AREA)
- Food Science & Technology (AREA)
- Biochemistry (AREA)
- Pharmacology & Pharmacy (AREA)
- Inorganic Chemistry (AREA)
- Dispersion Chemistry (AREA)
- Epidemiology (AREA)
- Animal Behavior & Ethology (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Mycology (AREA)
- Polysaccharides And Polysaccharide Derivatives (AREA)
- Cosmetics (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102005026223A DE102005026223A1 (de) | 2005-06-07 | 2005-06-07 | Stabile Hemicellulose-Paste, Verfahren zu deren Herstellung und deren Verwendung |
| PCT/EP2006/005424 WO2006131337A1 (de) | 2005-06-07 | 2006-06-07 | Stabile hemicellulose-paste, verfahren zu deren herstellung und deren verwendung |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP1902069A1 true EP1902069A1 (de) | 2008-03-26 |
Family
ID=36791831
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP06743120A Withdrawn EP1902069A1 (de) | 2005-06-07 | 2006-06-07 | Stabile hemicellulose-paste, verfahren zu deren herstellung und deren verwendung |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US20080199573A1 (de) |
| EP (1) | EP1902069A1 (de) |
| DE (1) | DE102005026223A1 (de) |
| WO (1) | WO2006131337A1 (de) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FI20096326A0 (fi) * | 2009-12-15 | 2009-12-15 | Valtion Teknillinen | Modifioitu biomateriaali, sen käytöt sekä modifiointimenetelmät |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2545101B1 (fr) * | 1983-04-29 | 1985-08-16 | Agronomique Inst Nat Rech | Procede de modification des pectines de betterave, produits obtenus et leurs applications |
| TJ201B (en) * | 1991-11-16 | 1998-11-14 | Cpc International Inc | The process of production a cereal cellulose-containing extracts |
| US20020028197A1 (en) * | 1996-11-21 | 2002-03-07 | Colin Stanley Fitchett | Production of vegetable gels |
| WO1998040413A1 (en) * | 1997-03-14 | 1998-09-17 | National Starch And Chemical Investment Holding Corporation | Isolation of hemicellulose from corn fiber |
| AU747863B2 (en) * | 1997-03-20 | 2002-05-23 | Cambridge Biopolymers Limited | Improvements relating to bran gels |
-
2005
- 2005-06-07 DE DE102005026223A patent/DE102005026223A1/de not_active Withdrawn
-
2006
- 2006-06-07 WO PCT/EP2006/005424 patent/WO2006131337A1/de not_active Ceased
- 2006-06-07 EP EP06743120A patent/EP1902069A1/de not_active Withdrawn
- 2006-06-07 US US11/916,478 patent/US20080199573A1/en not_active Abandoned
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2006131337A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2006131337A1 (de) | 2006-12-14 |
| US20080199573A1 (en) | 2008-08-21 |
| DE102005026223A1 (de) | 2006-12-14 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
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| 17P | Request for examination filed |
Effective date: 20071214 |
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| AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR |
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| DAX | Request for extension of the european patent (deleted) | ||
| RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: HETTRICH, KAY Inventor name: DRECHSLER, ULRICH Inventor name: LOTH, FRITZ |
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| 17Q | First examination report despatched |
Effective date: 20080506 |
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| DAX | Request for extension of the european patent (deleted) | ||
| RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: FRAUNHOFER-GESELLSCHAFT ZUR FOERDERUNG DER ANGEWAN Owner name: DOW GLOBAL TECHNOLOGIES INC. Owner name: PETER KOELLN KGAA, KOELLNFLOCKENWERKE |
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| RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: FRAUNHOFER-GESELLSCHAFT ZUR FOERDERUNG DER ANGEWAN Owner name: DOW GLOBAL TECHNOLOGIES LLC Owner name: PETER KOELLN KGAA, KOELLNFLOCKENWERKE |
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| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
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| 18D | Application deemed to be withdrawn |
Effective date: 20140203 |