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33 results about "Wood-decay fungus" patented technology
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A wood-decay fungus is any species of fungus that digests moist wood, causing it to rot. Some species of wood-decay fungi attack dead wood, such as brown rot, and some, such as Armillaria (honey fungus), are parasitic and colonize living trees. Excessive moisture above the fibre saturation point in wood is required for fungal colonization and proliferation. Fungi that not only grow on wood but permeate its fibrous structure and actually cause decay, are called lignicolous fungi. In nature, this process causes the breakdown of complex molecules and leads to the return of nutrients to the soil. Various lignicolous fungi consume wood in various ways; for example, some attack the carbohydrates in wood and some others decay lignin. The rate of decay of wooden materials in various climates can be estimated by empirical models.
Wood preservative and preparation method thereof
ActiveCN102275192AGood fixation rateImprove permeabilityWood impregnation detailsViscous liquidGloeophyllum trabeum
The invention discloses a wood preservative and a preparation method thereof and belongs to the field of preservatives. The invention aims to solve the technical problem that a wood preservative has severe environmental harm, low permeability and low erosion resistance in the prior art. The wood preservative is prepared from nano copper oxide, ammonium citrate, distilled water, chitosan and a solution of acetic acid. The preparation method comprises the following steps of: 1, mixing the nano copper oxide and the ammonium citrate, adding the distilled water, and stirring to obtain nano copper oxid dispersion; and 2, adding the chitosan into the solution of acetic acid, adding the nano copper oxid dispersion, and stirring to obtain the wood preservative. The wood preservative is black brown viscous liquid and has an obvious bacteriostatic effect on wood decomposing fungi, such as monilinia fructicola, namely Gloeophyllum trabeum, and white rot fungi, namely Coriolus versicolor.
Owner:NORTHEAST FORESTRY UNIVERSITY
Antifungal Compositions for Inhibiting Growth of Wood Decay Fungi and Use Thereof
The present invention is related to an antifungal composition for inhibition of wood decay caused by wood rot fungi. The invention further comprises a method for inhibition of wood decay with gallates.
Owner:NAT TAIWAN UNIV
Edible fungus seed producing and breeding technique
The invention relates to a seed production and cultivation technology for an edible fungus, which is characterized in: medium materials are composed of 80 parts of sawdust, 19 parts of thalli dry powder and 1 part of gypsum powder; when in use, the medium materials are added with twice of water; beneficial bacteria are cultured in a culture medium composed of 98 parts of bran, 1 part of the gypsum powder and 85 parts of water; the cultured beneficial bacteria are packaged, sterilized, cooled and inoculated with lignin decomposing enzyme in an aseptic condition to prepare the thalli; the thalli is dried and crushed into dry thalli powder. The technology for the edible fungus is suitable for the production and cultivation of wood decay fungi such as pasania fungus, needle mushroom, black fungus, white fungus, hericium erinaceus, oyster mushroom, pleurotus eryngii, king oyster mushroom, pholiota nameko, chicken leg mushroom, ganoderma lucidum, and the like; and the technology has the advantages of low investment and fast effect.
Owner:徐连敏
Preparation method for novel wood preservative
InactiveCN102528866AOrganic compound preparationCarbonyl compound preparationAcetic acidPreservative
The invention relates to a preparation method for a novel wood preservative. The invention relates to a method for preparing the novel wood preservative, which comprises the following steps that: cyclopentadiene and a reaction product of dichloroacetyl chloride and triethylamine are subjected to an addition reaction to prepare a cyclopentadiene allyl ketene adduct, and the cyclopentadiene allyl ketene adduct is reacted with acetic acid, triethylamine, tert-butanol and water to prepare the novel wood preservative tropolone. The wood preservative with the concentration of 1% is used for treating wood, the decay-resistant capacity of the treated wood for wood decay fungi Trametes versicolor and Gloeophyllum trabeum reaches a strong decay-resistant level, and simultaneously the wood preservative has a mildew-proof effect.
Owner:UNIV OF SCI & TECH LIAONING
Vegetation-growing concrete for ecologically restoring slope and preparation method of vegetation-growing concrete
InactiveCN108529938AFull of corruptionGood corrosion environmentSolid waste managementOrganic fertilisersSolubilityCalcium biphosphate
The invention provides vegetation-growing concrete for ecologically restoring a slope and a preparation method of the vegetation-growing concrete. The vegetation-growing concrete comprises cement, sandy soil, organic calcium phosphate, greening additives and water. The preparation method includes steps such as preparing the greening additives. The vegetation-growing concrete and the preparation method thereof have the advantages that lightweight aggregate is replaced by the sandy soil, rich nutrition in the sandy soil is utilized to provide necessary nutrition for the growth of vegetation after concrete spraying, and the water solubility and acidity of the organic calcium phosphate are utilized to fast improve the strong basicity of the vegetation-growing concrete in the early spraying stage and promote the growth of the slope vegetation; the greening additives can improve the stability and durability of the vegetation-growing concrete and increase the germination rate and survival rate of slope vegetation seeds; the method is simple in process, on-site mixing before construction can be achieved to guarantee the activity of organic matter and wood-rotting fungi in the vegetation-growing concrete, and the organic matter and wood-decaying fungi in the vegetation-growing concrete can constantly provide a decaying fertilizer effect after concrete pouring.
Owner:熊远
Early period detection method for wood material biological decayed
InactiveCN1936541AQuick evaluationAccurate evaluationPreparing sample for investigationColor/spectral properties measurementsNonlinear dimensionality reductionWeightlessness
This invention relates to an early test method for molder biology of wood including: collecting a wood sample to be inoculated with different foxed bacterium and put into a cultivating room for biological molder, then taking out an early sample with the weightlessness lower than 10%, first of all, collecting near infrared spectrums on the solid surface of the sample, then, grinding the sample to powder and collecting the near infrared spectrum, carrying out smoothing, base line calibration, first order derivative, second order derivative or data dimensionality reduction, analyzing the main composition, soft independent modeling sort and deflection least square differentiate analysis to set up models separately so as to check if the wood is eroded, the color is changed or molded.
Owner:INST OF WOOD INDUDTRY CHINESE ACAD OF FORESTRY
Wood preservative and preparation thereof
InactiveCN101314232AEnhanced inhibitory effectBroad-spectrumWood impregnation detailsPaecilomycesPreservative
The invention discloses a wood preservative and a preparation method thereof. The invention relates to a preservative and a preparation method thereof. The invention solves the problems that the prior wood preservative is undegradable and pollutes environment after the wood preservative is used. The wood preservative is prepared by 0.1 to 1mol modified rosin and 1mol polyene polyamine according to a molar ratio through reaction, and the preparation method comprises the following: step one, the rosin is modified; and step two, the modified rosin and the polyene polyamine react to produce the wood preservative. The wood preservative has good inhibiting effect to stain fungus, aspergillus niger, wood-decaying fungus, white rot fungus, brown rot fungus and paecilomyces varioti bainier and can be degradable and has no harm to the environment.
Owner:NORTHEAST FORESTRY UNIVERSITY
Solvent-borne wood preservative compositions
InactiveUS20190084182A1Good dimensional stabilityEfficient use ofBiocideRadiation/waves wood treatmentParticulatesVegetable oil
Wood preservative compositions comprising a particulate copper compound in a solvent carrier with low aromatic content. Particulate copper dispersions in this composition demonstrated superior stability, and wood treated with the composition is protected from attack by wood decay fungi and termites. The invention is also directed to wood preservative compositions comprising: (a.) a biodegradable organic solvent carrier selected from the group consisting of vegetable oil, renewable resource oil, and biodiesel; (b.) a dispersion of solid particles of a metal compound having a particle size between about 0.005 microns to about 10 microns; (c.) an organic biocide; and (d.) a dispersant; ratio of the dispersant to the metal compound is from about 1:500 to about 100:1 (wt / wt). The invention is also directed to compositions comprising penflufen and solvent carriers. The invention is also directed to methods of treating wood using the compositions, and wood treated with the disclosed compositions and methods.
Owner:KOPPERS PERFORMANCE CHEM
Novel high-temperature-resistant glass tube and processing technique thereof
InactiveCN110156328AAvoid gatheringImprove permeabilityGlass shaping apparatusTemperature resistanceNitrogen gas
The invention relates to the technical field of glass materials, and in particular relates to a novel high-temperature-resistant glass tube and a processing technique thereof. The processing techniquecomprises the following steps: performing mixed fermentation on a No.1 filter cake, wood-decay fungi, a glucose solution and water, adding a ferric nitrate solution, performing mixing, adjusting thepH, performing filtration, performing drying, performing treatment by utilizing a nitrogen gas containing trimethylaluminum, performing carbonization, performing high-temperature treatment, performingcrushing, performing sieving to obtain modified rice husk fibers, mixing lard, lipase, the modified rice husk fibers, tetraethyl orthosilicate, tetrabutyl titanate and sodium sulfate at a constant temperature, performing filtration, performing drying, performing ball milling, performing sieving to obtain a pretreated mixed material, mixing the pretreated mixed material, modified quartz powder, alevelling agent, a pigment and a clarifying agent, performing heating melting, performing energization, introducing cryolite vapor for treatment, performing homogenization, performing clarifying, discharging bubbles, performing cooling, performing injection molding, performing molding, performing cooling, and performing demoulding to obtain the novel high-temperature-resistant glass tube. The novel high-temperature-resistant glass tube provided by the invention has excellent mechanical properties and high-temperature resistance.
Owner:YANCHENG HUAOU IND
Method for treating chlorinated organic compound wastewater by virtue of biomass carrier immobilized bacteria
InactiveCN105174495AEasy to handleReduce processing costsWater contaminantsBiological water/sewage treatmentOrganic compoundCulture mediums
The invention discloses a method for treating chlorinated organic compound wastewater by virtue of biomass carrier immobilized bacteria. The method comprises the following steps: selecting soil from the location which is 9cm-11cm below the ground surface layer as a strain, carrying out enlarged culture for 3-5 days under liquid-state PDA culture medium conditions, so as to obtain bacterium suspension A; culturing a liquid state by virtue of a culture medium for 7-10 days to obtain wood decay fungi suspension; culturing a solid state by virtue of a culture medium for 3-5 days to obtain a pure wood decay fungi strain; mixing extracted and filtered chlorinated organic compound wastewater with rice husks, carrying out high-temperature steam sterilization, inoculating the pure wood decay fungi strain, and carrying out shake culture for 5-7 days, so as to obtain immobilized microorganisms; and adding the immobilized microorganisms into chlorinated organic compound wastewater, and reacting for 2-3 days, so as to obtain purified wastewater. In the system, the rice husks serve as a biological carrier and simultaneously supply a carbon source for microorganisms, so that the cost for independently feeding the carbon source to industrial wastewater is saved. Furthermore, the rice husks, being of a wood decay fungi, are suitable for being used as the carbon source.
Owner:WUHAN INSTITUTE OF TECHNOLOGY
Consortium of fungi immobilized on a laminar lignocellulose carrier for the treatment of wastewater and method for producing same
ActiveUS20160280574A1High porosityImprove malleabilityFungiTreatment using aerobic processesYarnCellulose
The invention relates to a laminar biocarrier made by weaving or interlacing yarns of lignocellulosic material, which supports and immobilizes a consortium of wood-decay fungi, in particular strains of Pleurotusostreatus and Phanerochaetechrysosporium, for the treatment of wastewater contaminated by colourants, heavy metals, chemical oxygen demand and biological oxygen demand. The invention also relates to a method for producing the inoculated laminar biocarrier and to the use thereof as a filter for reactors of different configurations for the treatment of waste effluents.
Owner:PONTIFICIA UNIV JAVERIANA
Technique for sowing and culturing edible rare wood-decay fungus
InactiveCN1378775AShortened germination periodShorten fruiting timeMicrobiology processesHorticultureBiotechnologyEconomic benefits
A production technique for cultivating rate edible wood-decay fangus includes such steps as preparing aseptic culture medium and granular seeds, and mechanical sowing. Its advantages are short production period (4-6 production periods in one year), good synchronous growth of hyphae, low pollution rate, high biologic conversion percentage, and obvious economic benefit.
Owner:烟台市牟平区食用菌研究所
Reagent used for corrosion prevention of populus tomentosa plate white rot fungi
InactiveCN108724387AGood chemical stabilityImprove anti-corrosion performanceWood treatment detailsWood impregnation detailsTreatment effectCarboxylic acid
The invention belongs to the technical field of plate treatment and particularly relates to a reagent used for corrosion prevention of populus tomentosa plate white rot fungi. A preparation method ofthe reagent comprises the steps of preparing of raw materials, preparation of a modified chitosan copper compound, preparation of a moderating solution and preparation of a corrosion prevention reagent. Compared with the prior art, the reagent for corrosion prevention of the populus tomentosa plate white rot fungi has the following advantages that the modified chitosan copper compound is synergistically prepared through dimethylformamide and a hydroxy carboxylic acid aqueous solution with the concentration being 4-4.5 mol / L, the chemical stability of the corrosion-prevention reagent can be improved through a precipitated silica mixed solution, meanwhile, the corrosion-prevention property of the corrosion-prevention reagent to the populus tomentosa plate white rot fungi can be improved, andthe white-rot-prevention effect on masson pine is obvious; and the reagent formula is friendly to the development environment, the prevention and treatment effects on populus tomentosa plates and other wood rot fungi and the loss-resistant and permeability-resistant properties can be effectively improved, accordingly, the using range of the plate is expanded, and the service life of the plate isprolonged.
Owner:ANHUI DAIJIA CRAFT CO LTD
Wood preservative and application thereof
InactiveCN110014488ASimple preparation processEasy to operateWood treatment detailsPressure impregnationChemical LinkageWater baths
The invention discloses a wood preservative. The effective bacteriostatic components of the wood preservative comprise salicylic acid, and the salicylic acid is present in the wood preservative at least in the form of microcapsules. Preparation of salicylic acid microcapsules comprises the following steps: weighing salicylic acid dissolved in 8-35 mL of ethanol, and adding 2-5 g of a composite surfactant into the salicylic acid ethanol solution, heating to 40-60 DEG C, adding water, adding sodium chloride solution, and stirring to obtain emulsion; when completely emulsified, adding 10-35 mL ofethyl orthosilicate, stirring in 40-60 DEG C water bath to obtain that salicylic acid microcapsule. The invention also provides the application of the wood preservative. The salicylic acid microcapsules are combined with wood components through strong chemical bonds to improve the anti-loss performance of the preservative and have obvious inhibitory effect on wood rot fungi.
Owner:NORTHWEST A & F UNIV
Fungus residue biological reaction material, reactors and application of reactors
InactiveCN109618590AAvoid pollutionSolve the problem of poor technical external effectsBio-organic fraction processingClimate change adaptationSoil fertilityBacterial agent
The invention discloses a fungus residue biological reaction material, reactors and application of the reactors. The fungus residue biological reaction material comprises fungus residues and a composted bacterial agent with the mass ratio of (1,000-1,200):(1-3); the fungus residues comprise, by mass, 1-3 parts of wood decay fungus residues and 3-5 parts of straw rotting fungus residues. Accordingto the fungus residue biological reaction material, a biological reaction groove is dug on a flat land parcel and comprises breath segments located at the two ends of the groove and a reaction segmentlocated between the two breath segments; the reaction segment is filled with the fungus residue biological reaction material which is buried in soil, the breath segments are filled with corn straw, the fungus residues ferment through watering and puncturing, and the internal fungus residue biological reactor is obtained; or a medium bag is filled with the fungus residue biological reaction material, the two ends of the medium bag are sealed, two planting ports with a set spacing distance are formed in the surface of the medium bag, through watering and external placement, the medium bag is flat placed on the surface of the land parcel, and the external fungus residue biological reactor is obtained. The reactors can be applied to agricultural production and has the advantages that waste isutilized, the soil fertility is improved, and the diseases and pests are reduced.
Owner:甘肃怡泉新禾农业科技发展有限公司
Anilide-based compounds for preserving wood and method of use thereof
InactiveUS8785662B2Improve freshnessSmall chemical dosageBiocideOrganic chemistryPreservativeCarboxylic acid
Owner:SDS BIOTECH CO LTD
Microbial agent composition for planting pseudo-ginseng and use method of microbial agent composition
PendingCN113273467AImprove qualityImprove survival rateFertilising methodsRoot crop cultivationBiotechnologyMicrobial agent
The invention discloses a microbial agent composition for planting pseudo-ginseng. The microbial agent composition comprises one or a combination of more of wood decay fungi, bacillus subtilis, pseudomonas fluorescens, trichoderma harzianum and chitosan. A series of microbial agent combinations for planting the pseudo-ginseng is provided according to the environment and factors of pseudo-ginseng planting, the microbial agent combinations comprise a microbial agent A, a microbial agent B, a microbial agent C and a microbial agent D according to different planting environment and product quality requirements, and different microbial agent environment requirements of pseudo-ginseng planting for an old land re-planting background, an organic pseudo-ginseng planting background and a green pseudo-ginseng planting background are met. Under the background of old land re-planting management, root rot of the pseudo-ginseng can be effectively inhibited, and the survival rate of the pseudo-ginseng is increased; under the background of organic pseudo-ginseng planting, the yield of pseudo-ginseng is remarkably increased; and under the background of green pseudo-ginseng planting, the use amount of chemical fertilizer is greatly reduced, the risk of pesticide residues at the root of pseudo-ginseng is reduced, and the quality of pseudo-ginseng is improved.
Owner:文山苗乡三七股份有限公司
Tea polyphenol preservative and using method thereof
ActiveCN105690515AEnhanced inhibitory effectWood treatment detailsPressure impregnationVacuum pumpingWater vapor
The invention discloses a tea polyphenol preservative and a using method thereof, and belongs to the field of wood corrosion prevention. The invention aims to provide a wood preservative and a using method thereof. The tea polyphenol preservative is prepared from water-soluble tea polyphenol powder and sterile distilled water; water vapor heating treatment further can be carried out, or synergists such as VE, NaCl and the like are added. The using method for the tea polyphenol preservative comprises the following steps: carrying out vacuum-pumping on wood for 0.5-1.5 hours in an environment with vacuum degree being 0.098MPa; soaking the wood by use of the tea polyphenol preservative for 1-3 hours under soaking pressure of 0.8-1.2MPa, and putting the soaked wood at the normal temperature for 1 hour, and then drying the soaked wood for 10-15 hours in an oven with a temperature being 60-85 DEG C. The product has relatively strong inhibiting effect on growth of wood-decaying fungi (coriolus versicolor and glocophyllum trabocum). The tea polyphenol preservative is used for corrosion prevention of wood.
Owner:黑龙江省木材科学研究所
Solvent-borne wood preservative compositions
InactiveUS20200282592A1Good dimensional stabilityReduced swelling, checking, splitting, warping, or twistingBiocideRadiation/waves wood treatmentPolymer scienceBiodiesel
Owner:KOPPERS PERFORMANCE CHEM
Industrialized production and cultivation method for edible fungi
The invention discloses an industrialized production and cultivation method for edible fungi. Earthing materials made of 70 percent of aquaculture pond soil and 30 percent of wood-decay fungus mushroom bran are adopted; excellent bacterial strains AS2796 are selected, fungus ages are consistent from beginning to end, and accordingly strain quality is obviously improved; a steam engine is started, steam is fed into, the material temperature slowly rises, and when the material temperature ranges from 60 DEG C to 62 DEG C, the temperature is maintained for 8 hours, and pasteurization is carried out; when disinfection is completed, ventilation is conducted immediately, and the temperature of cultivation materials is dropped to 55 DEG C at the speed that one celsius degree is dropped every hour; in the next day after pasteurization, the material temperature is dropped by 3-5 DEG C again at the speed that one celsius degree is dropped every day and maintained at the temperature of 50 DEG C-52 DEG C for 3-5 days. The method has a great significance in promoting the industrialized production scientific level of agaricus bisporus and scientific and technological progress of the mushroom cultivation industry and promoting resource-saving and environment-friendly ecological agriculture development.
Owner:天津市金三农农业科技开发有限公司
Wood bactericidal preservative preparation method
InactiveCN108651471AHigh bactericidal activityInhibit synthesisBiocideWood treatment detailsChemical synthesisCyclohexene
The invention discloses a wood bactericidal preservative preparation method. Substances including CCl4, CH2Cl2, 4-(1H-benzimidazole-2-yl)-6-(substituted phenylpyrimidine-2-yl)-aklyl / benzyl thioether and the like are added into raw materials including m-dichlorobenzene, acetylchloride, cyclohexene amine ketone and the like to obtain a novel bactericidal preservative by physical compounding and chemical synthesis. The bactericidal preservative prepared according to the method is stable in property, the wood-decaying fungus inhibition performance is remarkably improved as compared with that of wood bactericidal preservatives on the market, wood appearances have no evident changes after long-term wood placement, and a high popularization and application value is achieved.
Owner:长乐智高生物科技有限公司
Trichoderma strain with wood preservation and biocontrol functions and application thereof
The invention discloses a trichoderma strain for inhibiting wood decay fungi and application of the trichoderma strain in wood preservation and biocontrol. The Trichoderma virens strain is Trichoderma virens NY45 CGMCC (China General Microbiological Culture Collection Center) No.40004, and the Trichoderma virens strain is a Trichoderma virens strain The strain can inhibit growth of wood white rot fungi and brown rot fungi, and wood can be prevented from being infected by decay fungi and degraded after being treated by the trichoderma strain spore liquid.
Owner:INST OF WOOD INDUDTRY CHINESE ACAD OF FORESTRY
A kind of wood preservative and its application
Owner:NORTHWEST A & F UNIV
Biomass carrier immobilized bacteria method for treating chlorinated organic waste water
InactiveCN105174495BEasy to get materialsWide variety of sourcesWater contaminantsBiological water/sewage treatmentOrganic compoundCulture mediums
Owner:WUHAN INSTITUTE OF TECHNOLOGY
Consortium of fungi immobilized on a laminar lignocellulose carrier for the treatment of wastewater and method for producing same
Owner:PONTIFICIA UNIV JAVERIANA
Wood preservative and preparation thereof
InactiveCN101314232BSmall molecular weightWide variety of sourcesWood impregnation detailsPaecilomycesPreservative
The invention discloses a wood preservative and a preparation method thereof. The invention relates to a preservative and a preparation method thereof. The invention solves the problems that the prior wood preservative is undegradable and pollutes environment after the wood preservative is used. The wood preservative is prepared by 0.1 to 1mol modified rosin and 1mol polyene polyamine according to a molar ratio through reaction, and the preparation method comprises the following: step one, the rosin is modified; and step two, the modified rosin and the polyene polyamine react to produce the wood preservative. The wood preservative has good inhibiting effect to stain fungus, aspergillus niger, wood-decaying fungus, white rot fungus, brown rot fungus and paecilomyces varioti bainier and canbe degradable and has no harm to the environment.
Owner:NORTHEAST FORESTRY UNIVERSITY
Use of tea polyphenols to inhibit Coriolus versicolor and Myxophyllum compacta
ActiveCN105690515BEnhanced inhibitory effectWood treatment detailsPressure impregnationWater vaporPolyphenol
Owner:黑龙江省木材科学研究所
Automatic watering cart for wood decay fungi
PendingCN110476726AControl the amount of water sprayedLow investment costCultivating equipmentsMushroom cultivationAgricultural engineeringSpray nozzle
The invention discloses an automatic watering cart for wood decay fungi. The automatic watering cart comprises a cart body and a column; the bottom of the column is fixed to the cart body, a slidewayis formed in the back face of the column, and a water spraying connection rod is connected to the column through a limit device and comprises a main water supply pipe, multiple spray nozzle layer pipes, an adjustment rod, a pulley combination and a connection line. A connector is arranged at the bottom of the main water supply pipe; the spray nozzle layer pipes are connected to the main water supply pipe from top to bottom layer by layer; a row of spray nozzles are arranged at the front ends of the spray nozzle layer pipes; the bottom of the adjustment rod is fixed to the cart body, and a winch, a winch handle and a winch positioning mechanism are fixed to the upper end of the adjustment rod; the pulley combination comprises a first positioning pulley, a second positioning pulley and a third positioning pulley; the front end of the connection line is fixed to a limit mechanism, and the connection line penetrates through the first positioning pulley, the second positioning pulley and the third positioning pulley in sequence and then winds the winch; the connection line drives the limit mechanism and the water spraying connection rod to move up and down under retraction and release of the winch.
Owner:江苏润正生物科技有限公司
Antifungal compositions for inhibiting growth of wood decay fungi and use thereof
The present invention is related to an antifungal composition for the inhibition of wood decay caused by wood rot fungi. The invention further comprises a method for the inhibition of wood decay with gallates.
Owner:NAT TAIWAN UNIV
Antifungal compositions for inhibiting growth of wood decay fungi and use thereof
The present invention is related to an antifungal composition for the inhibition of wood decay caused by wood rot fungi. The invention further comprises a method for the inhibition of wood decay with gallates.
Owner:NAT TAIWAN UNIV
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