AI SearchChitosan solution behavior during storage (Record no. 17094)
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| 000 -LEADER | |
|---|---|
| fixed length control field | 03665nas|a2200397 i 4500 |
| 005 - DATE AND TIME OF LATEST TRANSACTION | |
| control field | 20260817172703.0 |
| 008 - FIXED-LENGTH DATA ELEMENTS--GENERAL INFORMATION | |
| fixed length control field | 020215s2001 th uzm rtt 00| a1eng d |
| 035 ## - SYSTEM CONTROL NUMBER | |
| System control number | .b11845958 |
| 099 #9 - LOCAL FREE-TEXT CALL NUMBER (OCLC) | |
| Classification number | AIT Thesis no. BP-01-06 |
| 100 0# - MAIN ENTRY--PERSONAL NAME | |
| Personal name | Nguyen Thi Thanh Binh |
| 245 10 - TITLE STATEMENT | |
| Title | Chitosan solution behavior during storage |
| 260 ## - PUBLICATION, DISTRIBUTION, ETC. | |
| Place of publication, distribution, etc. | Bangkok : |
| Name of publisher, distributor, etc. | Asian Institute of Technology, |
| Date of publication, distribution, etc. | 2001 |
| 300 ## - PHYSICAL DESCRIPTION | |
| Extent | 74 leaves |
| 490 1# - SERIES STATEMENT | |
| Series statement | Thesis ; |
| Volume/sequential designation | no. BP-01-06 |
| 500 ## - GENERAL NOTE | |
| General note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Science, School of Environment, Resources and Development |
| 502 ## - DISSERTATION NOTE | |
| Dissertation note | Thesis (M.Sc.) - Asian Institute of Technology, 2001 |
| 520 ## - SUMMARY, ETC. | |
| Summary, etc. | In this study, the degradation of chitosan in organic acids has been examined. Two methods of Capillary Viscometry and Gel Permeation Chromatography (GPC) have been applied to evaluate the change of intrinsic viscosity and molecular weight of shrimp chitosan with a degree of deacetylation of 81.5% and 88%DD respectively. Storage of chitosan in 0.2M acetic acid was examined during 60 days at three different temperatures: 5, 28 and 60°C. It was found that the higher the storage temperature, the faster the rate of degradation. The viscosity of 8 l .5%DD chitosan was reduced to less than 10% of the original value after 60 days of incubation at 60°C. The chitosan of higher degree of deacetylation has a better resistance to acid hydrolysis. Minor changes on the intrinsic viscosity and molecular weight were observed after the treatment at 28°C and nearly no change after treatment at 5°C. The intrinsic viscosity and molecular weights of chitosan in three concentrations of acetic acid of 0.1, 0.2 and 0.8M before and after precipitation was compared. No significant difference has been found. The effect of formic acid and acetic acid in various concentrations on degradation of chitosan was studied. After incubation the chitosan was precipitated with alkali and redissolved in acetic acid. It was found that chitosan is more resistant to degradation in foimic acid than in acetic acid. However, between three concentrations of 0.1, 0.2 and 0.8M of individual acid, only minor differences in the rate of degradation were observed. The results in viscosity-average molecular weight obtained from viscometry method were very consistent with the results in weight-average molecular weight obtained by GPC method. This illustrates the accuracy of these analytical methods and suggests that viscometry method can be widely used for determining the molecular weight of chitosan in routine laboratory. |
| 650 10 - SUBJECT ADDED ENTRY--TOPICAL TERM | |
| Topical term or geographic name entry element | Chitosan |
| General subdivision | Storage |
| 700 1# - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Stevens, Willem Frans, |
| Relator term | Chairperson |
| 700 1# - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Suwalee Chandrkrach, |
| Relator term | Examination committee |
| 700 1# - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Trankler, Josef, |
| Relator term | Examination Committee |
| 700 1# - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Suwabun Chirachanchai, |
| Relator term | Examination committee |
| 710 2# - ADDED ENTRY--CORPORATE NAME | |
| Corporate name or jurisdiction name as entry element | Swedish International Development Cooperation Agency (Sida), |
| Relator term | Scholarship donor |
| 810 2# - SERIES ADDED ENTRY--CORPORATE NAME | |
| Corporate name or jurisdiction name as entry element | Asian Institute of Technology. |
| Title of a work | Thesis ; |
| Volume/sequential designation | no. BP-01-06 |
| 856 ## - ELECTRONIC LOCATION AND ACCESS | |
| Materials specified | Full-Text |
| Uniform Resource Identifier | <a href="http://203.159.5.9/ait-thesis/detail.php?q=B07828">http://203.159.5.9/ait-thesis/detail.php?q=B07828</a> |
| 907 ## - LOCAL DATA ELEMENT G, LDG (RLIN) | |
| a | .b11845958 |
| b | mnait |
| c | u |
| 902 ## - LOCAL DATA ELEMENT B, LDB (RLIN) | |
| a | 240329 |
| 998 ## - LOCAL CONTROL INFORMATION (RLIN) | |
| Operator's initials, OID (RLIN) | 0 |
| Cataloger's initials, CIN (RLIN) | 020215 |
| First date, FD (RLIN) | m |
| -- | a |
| -- | u |
| -- | 0 |
| 945 ## - LOCAL PROCESSING INFORMATION (OCLC) | |
| l | mnait |
| 945 ## - LOCAL PROCESSING INFORMATION (OCLC) | |
| l | mnarc |
| 942 ## - ADDED ENTRY ELEMENTS (KOHA) | |
| Koha item type | 22-AIT Thesis (Replacement) |
| 942 ## - ADDED ENTRY ELEMENTS (KOHA) | |
| Koha item type | 40-Archives |
| 909 ## - LOCAL ITEMS USED | |
| Barcode | Barcode : 30050120683031 |
| CREATED | CREATED : 2013-06-09 |
| RECORD Id | RECORD # : i12740007 |
| LPATRON | LPATRON : 0 |
| LCHKIN | LCHKIN : - |
| RENEWALS | # RENEWALS : 0 |
| -- | # OVERDUE : 0 |
| -- | IUSE3 : 1 |
| -- | TOT CHKOUT : 0 |
| -- | TOT RENEW : 0 |
| 909 ## - LOCAL ITEMS USED | |
| Barcode | Barcode : 30050120350896 |
| CREATED | CREATED : 2016-10-06 |
| RECORD Id | RECORD # : i13029587 |
| LPATRON | LPATRON : 0 |
| LCHKIN | LCHKIN : - |
| RENEWALS | # RENEWALS : 0 |
| -- | # OVERDUE : 0 |
| -- | IUSE3 : 0 |
| -- | TOT CHKOUT : 0 |
| -- | TOT RENEW : 0 |
| Withdrawn status | Lost status | Damaged status | Not for loan | Home library | Current library | Shelving location | Date acquired | Cost, normal purchase price | Total checkouts | Full call number | Barcode | Date last seen | Copy number | Price effective from | Koha item type |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Available for Loans | Asian Institute of Technology Library | Asian Institute of Technology Library | AIT Publications | 17/08/2026 | 50.00 | AIT Thesis no. BP-01-06 | 30050120683031 | 17/08/2026 | 3 | 17/08/2026 | 22-AIT Thesis (Replacement) | ||||
| Available for Loans | Asian Institute of Technology Library | Asian Institute of Technology Library | Archives | 17/08/2026 | AIT Thesis no. BP-01-06 | 30050120350896 | 17/08/2026 | 17/08/2026 | 40-Archives |