AI SearchDevelopment and testing of instruments and a process for color measurement as methods to determine cocoa bean quality (Record no. 28534)
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| 000 -LEADER | |
|---|---|
| fixed length control field | 03716cas a2200409 a 4500 |
| 005 - DATE AND TIME OF LATEST TRANSACTION | |
| control field | 20260818090559.0 |
| 008 - FIXED-LENGTH DATA ELEMENTS--GENERAL INFORMATION | |
| fixed length control field | 111005s1990 th uu|m rtt 0| a1eng d |
| 035 ## - SYSTEM CONTROL NUMBER | |
| System control number | .b10197114 |
| 099 #9 - LOCAL FREE-TEXT CALL NUMBER (OCLC) | |
| Classification number | AIT Thesis no. AE-90-14 |
| 100 1# - MAIN ENTRY--PERSONAL NAME | |
| Personal name | Wahyudi, Teguh |
| 245 10 - TITLE STATEMENT | |
| Title | Development and testing of instruments and a process for color measurement as methods to determine cocoa bean quality |
| 260 ## - PUBLICATION, DISTRIBUTION, ETC. | |
| Place of publication, distribution, etc. | Bangkok : |
| Name of publisher, distributor, etc. | Asian Institute of Technology, |
| Date of publication, distribution, etc. | 1990 |
| 300 ## - PHYSICAL DESCRIPTION | |
| Extent | 82 p. |
| 490 1# - SERIES STATEMENT | |
| Series statement | Thesis ; |
| Volume/sequential designation | no. AE-90-14 |
| 500 ## - GENERAL NOTE | |
| General note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering, School of Environment, Resources and Development |
| 502 ## - DISSERTATION NOTE | |
| Dissertation note | Thesis (M.Eng.) - Asian Institute of Technology, 1990 |
| 520 ## - SUMMARY, ETC. | |
| Summary, etc. | A study to assess the change in cocoa bean quality parameters was made. The study included the testing of existing quality assessment methods, the testing of appropriateness in the use of fermentation index and colo1 measurement as an indirect quality assessment. The possibility of using a simple photodiode sensing instrument as a cocoa color difference meter was also studied. The fermentation index value increased from 0 .47 to 1. 10 for different fermentation durations. Cocoa bean acidity (pH) decreased from 6 . 46 to 4. 82. Reducing sugars increased from 0.27 to 1.01 %, while free amino acids increased from 0.27 to 0 {u2022} 6 7 % for the same fermentation durations . Anthocyanin content decreased from about 50.6 to 15.3 %, yellow/brown pigment polymers increased from about 23. 2 to 53. 8 % , and no significant changes for red pigment polymer, within the changes of cocoa color categories 1 to 5. The test of quality assessment methods showed that the cut- test score and taste- test methods were not adequate lo assess bean quality objectively. The fermentation index method 1.i as useful to distinguish different bean samples from 5 color· categories. The fermentation index related well with other quality parameters, such as pH, reducing sugars , free ami110 acids , a nd cocoa color pigments. Direct color measurement method (in terms of L, a, and b color indicator values) had Q good relationship with fermentation index, pH , reducing sugars, and free amino acids. Color measurement was appropriate to estimate cocoa bean quality. Cocoa color measurements using the developed color measuring instrument were found to be acceptable since tJ1e results h ad a good relationship with fermentation index . |
| 650 #0 - SUBJECT ADDED ENTRY--TOPICAL TERM | |
| Topical term or geographic name entry element | Cocoa |
| 700 1# - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Illangantileke, Sarath G., |
| Relator term | Chairperson |
| 700 1# - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Jindal, Vinod Kumar, |
| Relator term | Examination Committee |
| 700 0# - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Athapol Noomhorm, |
| Relator term | Examination Committee |
| 710 2# - ADDED ENTRY--CORPORATE NAME | |
| Corporate name or jurisdiction name as entry element | NAR II Project of the Government of Indonesia, |
| 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. AE-90-14 |
| 856 ## - ELECTRONIC LOCATION AND ACCESS | |
| Materials specified | Full-Text |
| Uniform Resource Identifier | <a href="http://203.159.5.9/ait-thesis/detail.php?q=B18230">http://203.159.5.9/ait-thesis/detail.php?q=B18230</a> |
| 907 ## - LOCAL DATA ELEMENT G, LDG (RLIN) | |
| a | .b10197114 |
| b | mnait |
| c | s |
| 902 ## - LOCAL DATA ELEMENT B, LDB (RLIN) | |
| a | 240329 |
| 998 ## - LOCAL CONTROL INFORMATION (RLIN) | |
| Operator's initials, OID (RLIN) | 2 |
| Cataloger's initials, CIN (RLIN) | 951012 |
| First date, FD (RLIN) | m |
| -- | a |
| -- | s |
| -- | 0 |
| 945 ## - LOCAL PROCESSING INFORMATION (OCLC) | |
| l | mnait |
| 945 ## - LOCAL PROCESSING INFORMATION (OCLC) | |
| l | mnait |
| 945 ## - LOCAL PROCESSING INFORMATION (OCLC) | |
| l | mnarc |
| 942 ## - ADDED ENTRY ELEMENTS (KOHA) | |
| Koha item type | 20-AIT Publication |
| 942 ## - ADDED ENTRY ELEMENTS (KOHA) | |
| Koha item type | 40-Archives |
| 909 ## - LOCAL ITEMS USED | |
| Barcode | Barcode : 30050003005195 |
| CREATED | CREATED : 1994-05-16 |
| RECORD Id | RECORD # : i10236466 |
| LPATRON | LPATRON : 0 |
| LCHKIN | LCHKIN : - |
| RENEWALS | # RENEWALS : 0 |
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| 909 ## - LOCAL ITEMS USED | |
| Barcode | Barcode : 30050003005229 |
| CREATED | CREATED : 1994-05-16 |
| RECORD Id | RECORD # : i10236478 |
| LPATRON | LPATRON : 1015458 |
| LCHKIN | LCHKIN : 2002-11-18 |
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| 909 ## - LOCAL ITEMS USED | |
| Barcode | Barcode : 30050120363428 |
| CREATED | CREATED : 2016-05-27 |
| RECORD Id | RECORD # : i12999003 |
| LPATRON | LPATRON : 0 |
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| Withdrawn status | Lost status | Damaged status | Not for loan | Home library | Current library | Shelving location | Date acquired | 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 | 18/08/2026 | AIT Thesis no. AE-90-14 | 30050003005195 | 18/08/2026 | 1 | 18/08/2026 | 20-AIT Publication | ||||
| Available for Loans | Asian Institute of Technology Library | Asian Institute of Technology Library | AIT Publications | 18/08/2026 | AIT Thesis no. AE-90-14 | 30050003005229 | 18/08/2026 | 2 | 18/08/2026 | 20-AIT Publication | ||||
| Available for Loans | Asian Institute of Technology Library | Asian Institute of Technology Library | Archives | 18/08/2026 | AIT Thesis no. AE-90-14 | 30050120363428 | 18/08/2026 | 18/08/2026 | 40-Archives |