Abstract:
본 발명은 폴리유산 100중량부; 유기화 표면처리된 천매암 분말 0.1 내지 10중량부; 및 탄소나노튜브 0.1 내지 10중량부;를 포함하는 폴리유산 조성물에 관한 것으로서, 아이조드 충격강도 및 굴곡 탄성률 등 기계적 성질이 우수하면서도 결정화속도가 빠른 폴리유산 조성물을 제공할 수 있다.
Abstract:
본 발명은 푸마르산(fumaric acid) 생산 능력이 향상된 균주를 확보하기 위한 기술에 관한 것으로, 보다 상세하게는 균주를 돌연변이 유도 후 트리톤 X-100 및 브로모크레졸 퍼플이 포함된 선별배지에서 배양하여 푸마르산 생산 균주를 확인한 다음 이의 푸마르산 생산성을 확인하여 제조되는 푸마르산 고생산성 변이 균주 및 이를 이용하여 푸마르산을 고효율로 생산하는 방법에 관한 것이다.
Abstract:
PURPOSE: A mutant strain with high productivity of itaconic acid, a manufacturing method thereof, and a manufacturing method of itaconic acid using the same are provided to reduce catabolite repression phenomenon, thereby producing the itaconic acid at high yield from the beginning of cultivation. CONSTITUTION: A manufacturing method of mutant strain with high productivity of itaconic acid comprises the following steps: inducing a strain to a mutant; selecting a strain in which catabolite repression phenomenon by selecting 2- dioxy - glucose resistant strain; inducing the strain into mutant; and sorting strains with improved membrane permeability by selecting nystatin resistant strain. The strain is Aspergillus terreus. The strain is Aspergillus terreus 2DRNR (KACC93094P). The manufacturing method of the itaconic acid comprises the following steps: cultivating a mutant strain; and obtaining the itaconic acid from the cultivating fluid. [Reference numerals] (AA) Itaconic acid concentration(g/L); (BB) Strain
Abstract:
PURPOSE: A furan-based polyester copolymer is provided to replace a basic compound based on petrochemistry, and to use 2,5-furandicarboxylic acid based compound as a reaction raw material which can be originated from a biomass. CONSTITUTION: A furan-based polyester copolymer is represented by chemical formula 1. In chemical formula 1, R^1 is respectively and independently hydrogen, C1-10 alkyl, C3-14 cycloalkyl, C6-14 aryl, C6-14 alkylaryl or C6-14 arylalkyl, R^2 is respectively and independently C1-10 alkylene, C3-14 cycloalkylene, C6-14 arylene, C6-14 alkyl arylene or C6-14 arylalkylene, R^3 is C1-10 alkylene, C3-14 cycloalkylene, C6-14 arylene, C6-14 alkyl arylene or C6-14 arylalkylene, m, n and p is a number of repeating unit. The weight average molecular weight of the furan-based polyester copolymer is 1,000-500,000.
Abstract:
PURPOSE: A strain which produces itaconic acid of high concentration is provided to absorb dissolved oxygen in a micro-aerophilic environment and to produce itaconic acid with high efficiency. CONSTITUTION: An oxygen transfer protein gene is a Vitreoscilla spp.hemoglobin gene of sequence number 1. A transformed itaconic acid-producing strain of high productivity is prepared by transforming with an expression vector containing the gene of sequence number 1. The strain is Aspergillus terreus TF-8(KACC93093P). A method for producing itaconic acid comprises a step of culturing the strain; and a step of collecting itaconic acid from culture liquid.
Abstract:
PURPOSE: A biomass-derived curable compound and a method for preparing the same are provided to replace petroleum resource-derived curable materials. CONSTITUTION: A biomass-derived curable compound is formed by binding two epoxide functional groups to at least one furane compounds. The biomass-derived curable compound is denoted by chemical formula I or II. A solvent-free curable composition contains the biomass-derived curable compound and initiator. The initiator is a cationic curing initiator. A method for preparing the biomass-derived curable compound comprises: a step of preparing starting material from cellulose for making furan compounds; and a step of mixing the furan compounds and epichlorohydrin and stirring. The furan compounds are 2,5-bishydroxymethylfuran or a compound of chemical formula III.
Abstract:
PURPOSE: A method of manufacturing biodiesel by a discharge and absorption controlling system of methanol and glycerol is provided to minimize the inhibition of an enzyme inhibition material including methanol and glycerol, to produce biodiesel steadily, and to simplify a manufacturing device for biodiesel. CONSTITUTION: A method of manufacturing biodiesel comprises the following steps of: producing biodiesel by a transesterification of oil and methanol using enzymatic catalyst; inserting a porous material consisting methanol instead of inserting the methanol itself to the reactor; and separating glycerol from the porous material after a completion of the reaction. The porous material is a silica gel. The separation of the glycerol from the porous material is done by methanol and supercritical carbon dioxide. The reaction temperature for the transesterification is 40 deg C, and the stirring speed of the reactor is 300rpm.