Abstract:
PURPOSE: An extraction method of low molecular water-soluble dietary fiber from lignocelluloses-based biomass is provided to extract low molecular water-soluble dietary fiber which includes more than disaccharides in high yield. CONSTITUTION: An extraction method of low molecular water-soluble dietary fiber from lignocelluloses-based biomass comprises the following steps: hot water extracting lignocelluloses-based biomass at 140-170 deg. Celsius for 10 minutes to 5 hours by suspending the lignocelluloses-based biomass in extract solvent in order for pH of extract to be 3.8-4.5 after extraction of water-soluble dietary fiber; and rapidly cooling the hot water extract to room temperature. The extraction method additionally includes a step of adding base in order for pH of extract to be 3.8-4.5 before suspension of the biomass in the extraction solvent.
Abstract:
PURPOSE: A biomass processing method and an additive used for the method are provided to effectively absorb lignin-derived material and various activity inhibition materials, thereby promoting saccharification of cellulose by cellulose hydrolysis. CONSTITUTION: A biomass processing method comprises the following steps: suspending the biomass in water or aqueous acid solution; processing enzyme saccharification after acid pre-treating or autohydrolysis the biomass; and adding an additive selected from natural silicate, artificial silicate, zirconia, heat resistant organic polymer, activated carbon, and a mixture thereof to enzyme saccharification or the pre-treating. The biomass is crushed material or powdered form. The heat resistant organic polymer is polytetrafluoroethylene.
Abstract:
PURPOSE: A method for preparing GABA from mono sodium glutamate using a Lactobacillus strain or recombinant Lactobacillus strain is provided to ensure high productivity. CONSTITUTION: A method for preparing GABA by Lactobacillus strain comprises: a step of culturing the strain in a medium containing MSG(mono sodium glutamate) and glycine, chloroform, or EDTA for 48-96 hours; and a step of collecting GABA from the culture liquid. The strain is Lactobacillus brevis.
Abstract:
PURPOSE: A method for producing butnaol of high productivity using a strain is provided to be used in industrial technology. CONSTITUTION: A mutant Clostridium beijerinckii CBE-2-68 which produces butanol with high yield is deposited in the deposit number KCTC11606BP. A method for producing a large amount of butanol comprises: a step of culturing the Clostridium beijerinckii CBE-2-68 strain; a step of centrifuging the culture liquid to collect supernatant; and a step of purifying butanol.
Abstract:
PURPOSE: A peroxidase formulation with improved catalyst activity and a method for preparing the same are provided to prepare a compound with sulfoxide group. CONSTITUTION: A peroxidase formulation with a heme active site contains: a hetero ring of imidazole, benzimidazole, thiazole, or isooxazole; hetero ring compounds; and buffer as an active ingredient. The hetero ring compound is imidazole, 2-methyl imidazole, 1,2-dimethyl imidazole, imidazole carboxylic acid, benzimidazole, or benzimidazole-5-carboxylic acid. The peroxidase formulation additionally contains a carrier. The carrier is crystalline cellulose.
Abstract:
PURPOSE: A method for preparing strain which has enhanced butanol tolerance and produced butanol with high yield is provided to usefully use in biobutanol commercialization. CONSTITUTION: A method for measuring butanol content in a sample comprises: a step of reacting reagent containing alcodhol dehydrogenase, reaction buffer, and co-enzyme NAD+; a step of measuring absorbance of reagent at 340nm; a step of performing the reaction using a sample which possibly contains butanol; a step of measuring absorbance of the sample; and a step of comparing standard curve and calculating butanol content.
Abstract:
PURPOSE: A novel method for preparing nylon 4 combining enzyme reaction and chemical reaction is provided to produce from biomass-derived raw material and reduce production cost. CONSTITUTION: A method for preparing nylon 4 from biomass through enzyme reaction and chemical reaction comprises: a first step of using glutamic acid or glutamic acid dicarboxylase(GAD) to obtain 4-aminobutylic acid; a second step of producing 2-pyrrolidone from 4-aminobutylic acid using catalyst or dehydrating agent; and a third step of adding initiator and catalyst from 2-pyrrolidone to obtain the nylon 4. The glutamic acid dicarboxylase is gadA or gadB enyme from E.coli or gad1, gad2 or gad3 enzyme from lactobacillus. The E.coli is Escherichia coli W3110. The catalyst is alumina(Al2O3), chromium oxide (Cr2O3), or titanium dioxide (TiO2) or tungsten oxide (WO3).
Abstract translation:目的:提供生物质原料生产尼龙4组合酶反应和化学反应的新方法,降低生产成本。 构成:通过酶反应和化学反应从生物质制备尼龙4的方法包括:使用谷氨酸或谷氨酸二羧酸酶(GAD)获得4-氨基丁酸的第一步; 使用催化剂或脱水剂从4-氨基丁酸生产2-吡咯烷酮的第二步; 以及从2-吡咯烷酮中加入引发剂和催化剂以获得尼龙4的第三步骤。谷氨酸二羧酸酶是来自大肠杆菌的gadA或gadB enyme或来自乳杆菌的gad1,gad2或gad3酶。 大肠杆菌是大肠杆菌W3110。 催化剂是氧化铝(Al 2 O 3),氧化铬(Cr 2 O 3)或二氧化钛(TiO 2)或氧化钨(WO 3)。
Abstract:
본 발명은, 구리계 촉매를 사용하여 물을 사용하지 않는 반응 조건 하에서, n-부탄산을 단독으로 직접 기상 수소화시키거나 또는 무수 n-부탄산이나 n-부탄산의 n-부틸에스테르와 같은 부탄산 유도체를 함유한 n-부탄산을 직접 기상 수소화하는 공정에 있어서 부반응의 억제 하에 높은 선택성 및 높은 공간 수율로 n-부탄올을 제조할 수 있는 수소화 방법을 제공하는 것이다. 구체적으로, 본 발명은, 환원된 구리계 촉매 상에서 n-부탄산을 수소에 의하여 직접 기상 환원시키는 것을 포함하는, n-부탄올의 제조 방법으로서, 상기 환원형 구리계 촉매가, 실리카, 알루미나, 티타니아 및 산화아연으로 이루어진 군에서 선택되는 하나 이상의 희석제와 산화구리 성분의 복합 산화물을 환원시켜 수득된 구리계 촉매이거나, 또는 상기 촉매에 코발트, 아연, 망간, 루테늄, 레늄, 팔라듐, 백금, 은, 텔루륨, 셀레륨, 마그네슘 및 칼슘으로 이루어진 군에서 선택되는 하나 이상의 개량성분을 추가로 포함한 촉매로서, 산화구리 성분의 함량이 40~95wt%이고 산화구리 입자크기가 50nm 이하가 되도록 제조된 촉매이다. n-부탄산, n-부탄올, 바이오부탄올, 환원형 구리계 촉매
Abstract:
A method for preparing polypeptide libraries is provided to prepare a large quantity of polypeptide libraries within a short time through a simple manipulation, so that the polypeptide libraries are useful for screening new physiological or functional polypeptides. The polypeptide libraries are prepared by treating a parent protein with a protein-decomposing enzyme including endoproteinase selected from trypsin, chymotrypsin, pepsin, elastase, papain, thermolysin, endoproteinase Glu-C, endoproteinase Lys-C and endoproteinase Arg-C; a protein cleavage reagent selected from cyanogens bromide, formic acid, hydroxylamine and 2-(2'-nitrophenylsulfonyl-3-methyl-3-bromoindolenine); or a mixture thereof to prepare a mixture of polypeptides having lower number of amino acid than the parent protein, and optionally stabilizing the polypeptide mixture by reducing disulfide bonds and alkylating it.