摘要:
A culturing method and system are disclosed in which a cell culture broth is withdrawn from a culturing apparatus (1) to a filtration apparatus (6). The withdrawn broth is brought into contact with a membrane (7) for precision filtration. Then a non-toxic gas is blown into the broth by a sparger (9) while filtering the broth to separate the cells from waste liquid. Foams occurring on the surface of the broth due to gas bubbling are broken up by special layers (8). The separated cells are returned to the culture apparatus and the filtrate is withdrawn from the filtration apparatus to a filtrate tank (13). The method and system have such advantages that a perfusion culture of a long period of time can be realized because the clogging of the filtration membrane is effectively prevented.
摘要:
The thermostable glucoamylase of the present invention is highly active even in acidic pH ranges at high temperatures of 70°C or above. According to the process for production of glucose and production plant of the present invention, the liquefaction and saccharification of starch can be performed, without requiring either any cooling step or any neutralizing step with alkalis, because of the use of the thermostable glucoamylase of the present invention in combination with known acid-resistant and thermostable α-amylase.
摘要:
This invention provides an apparatus for culturing animal cells, which comprises diagnosis means to make it possible to diagnose by measuring sizes of the cells by means of image processing while a system of culturing the animal cells is cut off from the outside of the apparatus system, control means to control the culture conditions of a culturing cistern on the basis of a result of the diagnosis, and culture medium regenerating means to remove waste contents in a culture medium. In the apparatus of this invention, the culture system and diagnosis system are cut off from the outside of the apparatus system. Therefore, no infection of miscellaneous microorganism, etc., occurs, nor does consumption of valuable cells and products occur. Further, since it is possible to easily obtain data of the proportions of division potential-possessing cells and living cells, the environmental factors to the culturing cistern can be easily and instantly controlled based on the data, and therefore, the culturing efficiency can be enhanced.
摘要:
Cross-linked polyglucans obtained by cross-linking polyglucans having branched chains intermolecularly and/or intramolecularly or cross-linked homooligomers obtained by cross-linking α-1,4-linked homooligomers of glucose intermolecularly can selectively adsorb glucoamylase and/or β-amylase thereto. By the use of such three-dimensional, cross-linked high molecular weight substances, glucoamylase and β-amylase can be isolated and purified extremely efficiently.
摘要:
A centrifugal separation method for living cells is disclosed in which a cell containing solution is charged in a rotor chamber confined by a steam pressure-resistant wall. A rotor having septa is disposed in the rotor chamber. The septa are rotated in the same direction at the same angular velocity as the rotor while at least part thereof is immersed in a solution in the rotor when cells are to be centrifuged from the cell-containing solution. After the cells are separated and adhered to the inner surface of the rotor, a supernatant in the rotor is discharged from the rotor. Then a fresh cultivating medium is introduced into the rotor, and the septa and the rotor are rotated at mutually different angular velocities while at least part of the septa is immersed in the fresh medium in the rotor. As a result, the cells are again suspended in the fresh medium.
摘要:
This invention relates to a process for liquefying starch. More particularly it relates to an appropriate process for liquefying starch by using a thermostable a-amylase which has an optimum working pH range in an acidic region and a low calcium requirement. This invention provides a process for liquefying starch by using a calcium-requiring, thermostable a-amylase which requires a calcium concentration of 10 µM or below under a thermostable condition. In the process of the present invention, it is unnecessary to add a calcium salt in liquefying starch and the starch slurry can be reacted while remaining acidic without neutralization, so that the load at the desalting step of the product can be significantly relieved.
摘要:
57 This invention provides a process for easily recovering nearly white starch and protein having a high commercial value by depressing darkening of crushed slurry and juice in producing starch and protein of a subterranean stem. The above-mentioned process is characterized by adding at least one member selected from the group consisting of sodium thiosulfate, potassium thiosulfate, sodium hydrogen sulfite, sodium sulfite and potassium sulfite at the time of crushing the subterranean stem.
摘要:
The thermostable glucoamylase of the present invention is highly active even in acidic pH ranges at high temperatures of 70°C or above. According to the process for production of glucose and production plant of the present invention, the liquefaction and saccharification of starch can be performed, without requiring either any cooling step or any neutralizing step with alkalis, because of the use of the thermostable glucoamylase of the present invention in combination with known acid-resistant and thermostable α-amylase.