196 PATENT ABSTRACTS

reacting amino acids and uncharged or non- ionized peptide product in the presence of a pro- teolytic enzyme such as thermolysin. The equilibrium is shifted by diffusion of the unchar- ged peptide product across an ion-rejection membrane which removes the uncharged pep- tide from the reaction mixture and preferably the diffused uncharged peptide is quickly converted to a charged species that cannot back-diffuse into the reaction mixture so that the uncharged peptide is effectively pulled across the mem- brane.

set between 200 and 500 mV by the addition to an acid aqueous solution, which contains lignitic raw materials, of oxidizing agents and/or reducing agents and/or salts and/or phenolic compounds. The lignin degrading reaction and its attendant simultaneous bleaching effect is in- itiated by the addition of enzymes, micro- organisms, animal or plant cells. Continuous stirring allows the reaction to be maintained for several hours at a value that fluctuates about a constant redox potential value, and a constant temperature.

5202416

P R O T E A S E A B S O R B E N T F O R I S O L A T I N G A N D P U R I F Y I N G

P R O T E A S E S , A P R O C E S S F O R T H E P R E P A R A T I O N T H E R E F O R ,

A N D T H E M E T H O D F O R P U R I F Y I N G A P R O T E A S E

Werne Stuber, ques Eric P Pcir/a/, Lahntal, Federal Republic Of Germany assigned to Behringwerke Aktiengesellschaft

Peptide derivatives of the Formula I See Patent for Tabular Presentation PS in which Y is HN- (CH2)n-CO with n = 1 to 8 or a bond, X is CN, CH2OH or CHO and R is a support or a hydro- gen atom, a process for the preparation thereof, and the use thereof for affinity chromatography, especially for isolating and purifying proteases, are described.

5203964

P R O C E S S F O R P R O D U C I N G C E L L U L O S E F R O M L I G N I N

C O N T A I N I N G R A W M A T E R I A L S U S I N G A N E N Z Y M E O R

M I C R O O R G A N I S M W H I L E M O N I T O R I N G A N D

M A I N T A I N I N G T H E R E D O X P O T E N T I A L

Hans-Peter Call, D 5132 Ubach Palenberg, Federal Republic Of Germany

A process and an apparatus capable of removing and/or transforming lignin or its degradation products present in material containing lignocel- lulose. In the present process, a redox potential is

5204245

E X T R A C T I O N O F T H Y M I D I N E A N D O T H E R N U C L E O S I D E S

James Doncheck, James R Millis, Paul E Swanson assigned to E I du Pont de Nemours and Company

An enzymatic process for extracting a nucleoside, such as thymidine, from a biomass without substantial thymine production.

5204251

P R O C E S S O F E N Z Y M A T I C 1 N T E R E S T E R I F I C A T I O N

M A I N T A I N I N G A W A T E R C O N T E N T O F 30-300 P P M U S I N G

R H I Z O P U S

Susumu Kyotani, Isao Tsuiimura, Hideki Fukuda, D 5132Ubach~Palenberg, assigned to Kanegafuchi Kagaku Kogyo & Kabushiki Kaisha

A process of an enzymatic interesterification in a low water content condition, which comprises subjecting a reaction liquid containing (a) a fat or oil and (b) a member selected from the group consisting of(i) another fat or oil, (ii) a fatty acid ester with a lower alcohol and (iii) a fatty acid to the action of a lipase in the form of dried Rhizopus cells while maintaining the water con- centration between 5 and 1000 ppm in the reac- tion liquid during the reaction. In accordance with the process of the present invention, an interesterification of fat or oil can be carried out efficiently in a high yield.