摘要:

AbstractInvestigations of the starch granules of wheat throughout their development suggest that there are two distinct populations of granules that are initiated at separate stages of kernel development. Work with the Coulter Counter particularly supports this idea, but it is also in agreement with results of light microscopy, electron microscopy and chemical analysis.

ISSN:0038-9056    

DOI:10.1002/star.19810330202

出版商:WILEY‐VCH Verlag GmbH    

年代:1981

数据来源: WILEY

摘要:

AbstractDie Veränderungen nativer Amylose‐ und Wachsmaisstärke während des thermischen Dispergierens wurden durch Elutionsanalyse verfolgt. Die Verkleisterung der Stärke erfolgte im Brabender‐Viskographen. Die Kleister wurden thermisch dispergiert und zusätzlich mit NaOH‐Lösung behandelt. Durch stufenweise Elution wurde festgestellt, daß Korndesaggregation und Molekülzersetzung der Wachsmaisstärke viel intensiver verlaufen als die der Amylose‐stärke. Das zusätzliche Dispergieren der Amylosestärke in der NaOH‐Lösung verursacht eine Desaggregation der Amylose. Derartige Veränderungen wurden bei Wachsmaisstärke kaum beobachtet. Die Versuche brstätigten frühere Ergebnisse, nach denen ein Abfall der Molekulargewichte bei verlängertem Dispergiere

ISSN:0038-9056    

DOI:10.1002/star.19810330203

出版商:WILEY‐VCH Verlag GmbH    

年代:1981

数据来源: WILEY

摘要:

AbstractConditions affecting lactic acid formation were studied. Intact, scratched and presteeped corn grains were used in presence of fresh and old SO2solution with different concentrations. It was found that low concentrations of old SO2solution favour lactic acid formation, but low concentrations of fresh SO2solution and presteeped corn grains gave a higher quantity of lactic acid. Using a high concentration of SO2solution which inhibits lactic acid formation gave the highest yield of starch with the lowest protein content in the extracted starch.

ISSN:0038-9056    

DOI:10.1002/star.19810330204

出版商:WILEY‐VCH Verlag GmbH    

年代:1981

数据来源: WILEY

摘要:

AbstractOf the up‐to‐date industrial technologies applied in the starch industry, saccharification is practically the only procedure carried out batchwise with dissolved enzyme. No inexpensive industrial scale Technology has been developed so far for immobilization of enzyme. Therefore, cellulose amine and DEAE‐cellulose were investigated with respect to their application as carriers. For immobilization industrialAspergillus nigerglucoamylase (Miles L‐100) was used and glutaraldehyde and/or p‐benzochinone as binding reagent. In the case of cellulose amine carrier, most favourable binding can be attained with smallest particle‐size. With DEAE‐cellulose, the amount of enzymes bound depends on the swelling of the carrier, and binding can be observed even in the pores of D

ISSN:0038-9056    

DOI:10.1002/star.19810330205

出版商:WILEY‐VCH Verlag GmbH    

年代:1981

数据来源: WILEY

摘要:

AbstractThe paper briefly traces the technical development of chromatographic sugar separations by resinous molecular exclusion. The new system (Techni‐SweetTMSystem) for fructose separation from other sugars is presented in detail with an accompanying economic analysis. Operating results are presented from several pilot plant and commercial installations outlining product parameters and the influence of feed variables. A brief overview of the primary impact and usage of enriched Fructose products from starch hydrolysates in the U. S. is given in summar

ISSN:0038-9056    

DOI:10.1002/star.19810330206

出版商:WILEY‐VCH Verlag GmbH    

年代:1981

数据来源: WILEY

摘要:

AbstractPurified glucose isomerase fromActinoplanes missouriensiswas immobilized on porous DEAE‐cellulose beads by simple adsorption. The immobilized glucose isomerase retained over 70% of its original activity. The hinderance of immobilized enzyme activity due to pore diffusion and film diffusion was insignificant with the bead size at 35 mesh or smaller. The relative substrate flow rate can be kept at 0.04 cm/s or higher. The optimum pH of the imobilized enzyme did not change, however, the optimum pH range became broader. The broader pH profile indicated that immobilized enzymes are less sensitive to pH change in the substrate. The half life of the immobilized enzyme was at around 1,000 h at 60°C. Cobalt ions are not required for enzyme stability. The cost of using immobilized enzyme on DEAE cellulose beads should be less be than that of the whole cell immobilization system due primarily to the fact that DEAE‐cellulose beads are reusable for immobilization as well as for enzyme purifica

ISSN:0038-9056    

DOI:10.1002/star.19810330207

出版商:WILEY‐VCH Verlag GmbH    

年代:1981

数据来源: WILEY

摘要:

AbstractWhole‐cell glucose isomerase immobilization on radiation‐modified gelatine gel was demonstrated. The enzyme was stabilized within the cells by heat‐treatment at 70°C. The heat‐treated cells were mixed with radiation‐modified gelatine gel and cross‐linked by glutaraldehyde. Immobilized enzyme exhibited 70–75% activity as compared to the free cells. Several properties of immobilized glucose isomerase were studied under various reaction conditions. A continuous isomerization was performed using a column packed with cell granules. It has been found, that the half‐life of the immobilized glucose isomerase amounted

ISSN:0038-9056    

DOI:10.1002/star.19810330208

出版商:WILEY‐VCH Verlag GmbH    

年代:1981

数据来源: WILEY

ISSN:0038-9056    

DOI:10.1002/star.19810330209

出版商:WILEY‐VCH Verlag GmbH    

年代:1981

数据来源: WILEY

ISSN:0038-9056    

DOI:10.1002/star.19810330210

出版商:WILEY‐VCH Verlag GmbH    

年代:1981

数据来源: WILEY

ISSN:0038-9056    

DOI:10.1002/star.19810330211

出版商:WILEY‐VCH Verlag GmbH    

年代:1981

数据来源: WILEY