| Author | Pattra Maneesin |
| Call Number | AIT Thesis no. AE-95-10 |
| Subject(s) | Ham--Packaging
|
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of
Master of Science, School of Environment, Resources, and Development |
| Publisher | Asian Institute of Technology |
| Abstract | Sliced ham was packed in three different packaging films; Nylon/PE/Ir,
Nylon/LLDPE and KON/PE under vacuum, modified atmosphere packaging (MAP) and
packaging with oxygen absorber. Mechanical properties and barrier properties of these
films were investigated. Seal strength were ranked from high to low as Nylon/LLDPE >
Nylon/PE/Ir > KON/PE, respectively. KON/PE provided high barrier properties through
water and gas; while, the others had lower barrier properties.
The effect of packaging on the quality of sliced ham was studied. The results
showed that sliced ham in vacuum package could be stored for three weeks at 2±2° C.
Nylon/PE/Ir was confirmed to be suitable to use. Meanwhile, shelf life of sliced ham
packed under MAP was about two weeks at 2±2° C. It was indicated that the use of 20%
C02 and 80% N2 did not extend the shelf life of sliced ham due to high bacterial
contamination and the insufficient amount of C02 required to inhibit microbial growth.
KON/PE was considered to be the most compatible package when MAP was applied.
When storage at the same condition, sliced ham packed with 0 2 absorber could be
extended shelf life for three weeks. The use of 0 2 absorber presented better qualities over
conventional vacuum package in terms of drip loss and color protection. However, the
efficiency of 0 2 absorber depended on high barrier properties of KON/PE.
Evaluation of film properties after packing showed that mechanical strength
except seal strength was not affected by storage condition. Seal strength of the three
packaging films had a trend to decrease with time. However, there was no significant
difference (p >0.05) among these data. On the other hand, there were significant
difference(p>0.05) between the initial transmission rates and those obtained after used. It
was indicated that packaging films loss some barrier efficiency after storage for
sometimes. It was also found out that high barrier film was more sensitive to storage
hazard than the others due to high increase in transmission rates obtained. |
| Year | 1995 |
| Type | Thesis |
| School | School of Environment, Resources, and Development (SERD) |
| Department | Department of Food, Agriculture and Natural Resources (Former title: Department of Food Agriculture, and BioResources (DFAB)) |
| Academic Program/FoS | Agricultural and Food Engineering (AE) |
| Chairperson(s) | Athapol Noomhorm |
| Examination Committee(s) | Jindal, V. K.;Vincent, J. C. |
| Scholarship Donor(s) | Royal Thai Government
|
| Degree | Thesis (M.Sc.) - Asian Institute of Technology, 1995 |