Modification of starch during malting of sorghum
Due to the character of the original source materials and the nature of batch digitization, quality control issues may be present in this document. Please report any quality issues you encounter to digital@library.tamu.edu, referencing the URI of the item. Includes bibliographical references. Five s...
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fttexasamuniv:oai:oaktrust.library.tamu.edu:1969.1/ETD-TAMU-1994-THESIS-F6453 2023-07-16T03:58:09+02:00 Modification of starch during malting of sorghum Floyd, Cherie Diane 1994 electronic application/pdf reformatted digital https://hdl.handle.net/1969.1/ETD-TAMU-1994-THESIS-F6453 en_US eng Texas A&M University https://hdl.handle.net/1969.1/ETD-TAMU-1994-THESIS-F6453 This thesis was part of a retrospective digitization project authorized by the Texas A&M University Libraries in 2008. Copyright remains vested with the author(s). It is the user's responsibility to secure permission from the copyright holder(s) for re-use of the work beyond the provision of Fair Use. food science and technology Major food science and technology Thesis text 1994 fttexasamuniv 2023-06-27T23:04:54Z Due to the character of the original source materials and the nature of batch digitization, quality control issues may be present in this document. Please report any quality issues you encounter to digital@library.tamu.edu, referencing the URI of the item. Includes bibliographical references. Five sorghum varieties, Dorado, Malisor 84-7, Tortillero, ATx630*R3338, and ATx623*SC1 03 were malted according to standard procedures and monitored for malting quality and starch modification during a 5 day malting period. Dry matter losses (DML) and (x-and B-amylase activities increased with longer germination time. After 5 days of malting, ot-and B-amylase activities were highest in Dorado and lowest in Malisor 84-7. (x-Amylase activity in Dorado was 70% and B-amylase activity was 65% of a commercial barley malt reference. Starch decreased and enzyme susceptible starch increased with longer germination time. Apparent starch loss was highly correlated with DML and a-and B-amylase activities. The amount of soluble amylopectin at 850C decreased during malting for all varieties. The amount of soluble amylopectin at 1200C decreased for all normal endosperm varieties during germination. Malting increased the proportion of starch soluble at 1200 and 850C. Dextrins (MW 3.0 X 1 03 to 6.1 X 103 ) developed during malting in all varieties. After 5 days of malting, dextrin content ranged from 19.5% (Dorado) to 5.1% (Malisor 84-7) Dextrin development was delayed in Malisor 84-7 and Tortillero until germination day 1 or 2. ATx630*R3338 produced significantly more dextrins during the germination period. Dextrin content of the commercial barley malt was 15.6%. Total sugars (DP 1 to DP 6) increased during malting. After 5 days of malting, ATx623*SC1 03 had the highest amount of sugars (1 1.6%) and Malisor 847 had the lowest amount of sugars (6.6%). A commercial barley malt sample contained 10.6% sugars. Sucrose and glucose were the predominant sugars detected in malt. Enzyme activity, endosperm composition (normal versus waxy), and ... Thesis DML Texas A&M University Digital Repository |
institution |
Open Polar |
collection |
Texas A&M University Digital Repository |
op_collection_id |
fttexasamuniv |
language |
English |
topic |
food science and technology Major food science and technology |
spellingShingle |
food science and technology Major food science and technology Floyd, Cherie Diane Modification of starch during malting of sorghum |
topic_facet |
food science and technology Major food science and technology |
description |
Due to the character of the original source materials and the nature of batch digitization, quality control issues may be present in this document. Please report any quality issues you encounter to digital@library.tamu.edu, referencing the URI of the item. Includes bibliographical references. Five sorghum varieties, Dorado, Malisor 84-7, Tortillero, ATx630*R3338, and ATx623*SC1 03 were malted according to standard procedures and monitored for malting quality and starch modification during a 5 day malting period. Dry matter losses (DML) and (x-and B-amylase activities increased with longer germination time. After 5 days of malting, ot-and B-amylase activities were highest in Dorado and lowest in Malisor 84-7. (x-Amylase activity in Dorado was 70% and B-amylase activity was 65% of a commercial barley malt reference. Starch decreased and enzyme susceptible starch increased with longer germination time. Apparent starch loss was highly correlated with DML and a-and B-amylase activities. The amount of soluble amylopectin at 850C decreased during malting for all varieties. The amount of soluble amylopectin at 1200C decreased for all normal endosperm varieties during germination. Malting increased the proportion of starch soluble at 1200 and 850C. Dextrins (MW 3.0 X 1 03 to 6.1 X 103 ) developed during malting in all varieties. After 5 days of malting, dextrin content ranged from 19.5% (Dorado) to 5.1% (Malisor 84-7) Dextrin development was delayed in Malisor 84-7 and Tortillero until germination day 1 or 2. ATx630*R3338 produced significantly more dextrins during the germination period. Dextrin content of the commercial barley malt was 15.6%. Total sugars (DP 1 to DP 6) increased during malting. After 5 days of malting, ATx623*SC1 03 had the highest amount of sugars (1 1.6%) and Malisor 847 had the lowest amount of sugars (6.6%). A commercial barley malt sample contained 10.6% sugars. Sucrose and glucose were the predominant sugars detected in malt. Enzyme activity, endosperm composition (normal versus waxy), and ... |
format |
Thesis |
author |
Floyd, Cherie Diane |
author_facet |
Floyd, Cherie Diane |
author_sort |
Floyd, Cherie Diane |
title |
Modification of starch during malting of sorghum |
title_short |
Modification of starch during malting of sorghum |
title_full |
Modification of starch during malting of sorghum |
title_fullStr |
Modification of starch during malting of sorghum |
title_full_unstemmed |
Modification of starch during malting of sorghum |
title_sort |
modification of starch during malting of sorghum |
publisher |
Texas A&M University |
publishDate |
1994 |
url |
https://hdl.handle.net/1969.1/ETD-TAMU-1994-THESIS-F6453 |
genre |
DML |
genre_facet |
DML |
op_relation |
https://hdl.handle.net/1969.1/ETD-TAMU-1994-THESIS-F6453 |
op_rights |
This thesis was part of a retrospective digitization project authorized by the Texas A&M University Libraries in 2008. Copyright remains vested with the author(s). It is the user's responsibility to secure permission from the copyright holder(s) for re-use of the work beyond the provision of Fair Use. |
_version_ |
1771545153184464896 |