Abstract:
Package (1) for decayable foodstuffs (2), consisting of a package material (3) and forming a mainly closed package space (4) and a mainly closed indicator space (5) for an indicator (6). The indicator space (5) forms an exterior wall (8) adjoining the environment (7) and made of a material (9) with a controllable gas permeability so that gas can penetrate through the exterior wall into the indicator space in a controlled manner as the package (1) is ageing, so that the indicator (6) will indicate the entry of gas into the indicator space and therefore the ageing of the package upon the lapse of a certain time after the package was exposed to the environment; and an interior wall (10) of the indicator space (10), adjoining the package space (4) and made of a material controllably permeable to gas so that gas entering into and/or generated in the package space can penetrate from the package space into the indicator space in a controlled manner and the indicator will indicate that gas has entered into the package space.
Abstract:
The invention concerns an enzymatic process for pretreatment of wood raw-material which makes it possible to reduce the specific energy consumption of mechanical pulping and to improve the technical properties of the fibres. Cellobiohydrolase and mannanase enzymes produced by, e.g., the fungus Trichoderma reesei or other organisms are used for the treatment.
Abstract:
The present invention relates to a method of fractionating lignocellulosic biomass into at least one cellulose rich solid fraction and at least one liquid fraction, wherein an alkaline agent and water are added to the biomass to form a mixture and the biomass is contacted in the mixture with an oxidizing agent until most of the lignin is solubilised to produce a solid fraction comprising a cellulosic material having a reduced content of lignin and a liquid fraction comprising dissolved lignin. The method of invention is particularly useful for processing and pre-treating lignocellulose containing biomass e.g. for the production of chemicals and for other non- fibrous applications.
Abstract:
Host cells, comprising Kluveryomyces expressing heterologous cellulases produce ethanol from cellulose In addition, multiple host cells expressing different heterlogous cellulases can be co-cultured together and used to produce ethanol from cellulose The recombinant yeast strains and co-cultures of the yeast strains can be used to produce ethanol on their own, or can also be used in combination with externally added cellulases to increase the efficiency of sacchanfication and fermentation processes
Abstract:
Method of processing a carbohydrate raw-material. The method comprises subjecting the raw-material to a treatment carried out with an alkaline agent in an aqueous medium in the presence of O 2 for degrading at least a part of the raw-material in order to produce an aqueous suspension comprising solids and dissolved components, recovering at least a part of the aqueous suspension, and using at least a part of the recovered suspension for non-fibrous applications. According to the invention, the carbohydrate raw-material is subjected to the first treatment in the presence of a transition metal catalyst formed by a copper ion and a nitrogen donor ligand. The present invention provides efficient conversion of any lignocellulosic material (wood, straw, bagasse, etc.) to hydrolysable form. The present invention also provides separation of lignin from lignocellulosic materials and dissolution of the lignin thus separated into the water phase.
Abstract:
The present invention concerns a method for enzymatic treatment of lignocellulosic materials which contain xylan-polymers, such as cellulose kraft pulps. According to a method of the present kind, at least a part of the hexenuronic acid groups present in the material is selectively removed in order to remove metal ions from the pulp, to change the surface charge thereof, to improve the brightness stability of the pulp and to render the material more suitable for enzymatic treatment.
Abstract:
The present invention concerns a process for the mechanical or mechano-chemical treatment of biomass, wherein a mixture containing the biomass and optional further chemicals is pressed through the openings of one or more compactor one or more times. The process can be operated in a continuous manner by using more than one compactor and more than one compacting cycle, whereby the multiple compactors are operated sequentially.
Abstract:
The present invention relates to novel cellulase enzymes, especially novel endoglucanases including endoglucanase fusion proteins, preparations and compositions containing these endoglucanase enzymes and fusion proteins, expression vectors, host cells and methods for their preparation and uses of the cellulases, preparations and compositions in the textile, detergent and pulp and paper industries.
Abstract:
The present invention relates to a process for preparing a bleached cellulose pulp. In particular, the invention relates to a process for enhancing the enzymatic treatment of a cellulose pulp prior to bleaching, whereby the cellulose pulp is treated with an enzyme preparation having mannanase activity. According to the invention, the cellulose pulp is brought to a low kappa number prior to bleaching: softwood pulp is cooked to a kappa number below 20 and hardwood pulp to a kappa number below 15. Preferably, the cellulose pulp is brought to the desired kappa number by continuous MC cooking, superbatch cooking, RHD (Rapid Displacement Heating) in combination with extended cooking, isothermal cooking (ITC), or EMC cooking. The obtained pulp is bleached after the enzymatic treatment, preferably by a bleaching sequence totally free of chlorine chemicals.
Abstract:
The present invention relates to a DNA sequence, which codes for endomannanase produced by fungi of the genus Trichoderma and transferred into a yeast or fungus strain induces that strain to produce endomannanase, as well as to a method for isolating genes coding for endomannanases. The invention also relates to vectors, yeast strains and fungal strains containing the DNA sequence. Furthermore, the invention provides an enzyme product containing at least one endomannanase, which contains at least one of the following endomannanases produced by fungi of the Trichoderma genus: an enzyme having mannanase activity and an isoelectric point (pI) of about 3.8, an enzyme having mannanase activity and a pI of about 4.1, an enzyme having mannanase activity and a pI of about 4.5, an enzyme having mannanase activity and a pI of about 5.4 and an enzyme having mannanase activity and a pI of about 6.5, the isoelectric points being determined by isoelectric focusing. The endomannanase enzyme and enzyme products according to the invention can be used for hydrolyzation of mannopolymers, in particular in connection with bleaching of lignocellulosic pulps.