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dc.creatorCaixeta, Aline Teixeiraen_US
dc.date.accessioned2012-06-07T23:03:04Z
dc.date.available2012-06-07T23:03:04Z
dc.date.created2001en_US
dc.date.issued2001
dc.identifier.urihttp://hdl.handle.net/1969.1/ETD-TAMU-2001-THESIS-C35en_US
dc.descriptionDue 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.en_US
dc.descriptionIncludes bibliographical references (leaves 117-123).en_US
dc.descriptionIssued also on microfiche from Lange Micrographics.en_US
dc.description.abstractSuperheated steam impingement drying was used as an alternative technique to develop nutritious fat-free potato chips. The effect of superheated steam temperature (115, 130, and 145° C) and convective heat transfer coefficient (100 and 160 W/m² °C) on the drying rate of potato chips and on the product quality properties such as shrinkage, density, porosity, microstructure, color, texture, and nutrition loss was investigated. Furthermore, superheated steam impingement dried potato chips (130 and 145° C, h = 100 W/m² °C) were compared to air dried (same conditions), commercial, and fried potato chips. During superheated steam impingement drying, temperature and convective heat transfer coefficient had a significant effect on the drying rate. Potato chips dried at higher drying temperature and convective heat transfer coefficient showed lower shrinkage, lower bulk density, higher porosity, larger pores, and darker color when compared to chips dried at lower temperatures and convective heat transfer coefficient. They presented lower values of hardness and lower vitamin C content. A higher rate of evaporation during the falling rate period was obtained when superheated steam was used as compared to air impingement drying. Potato chips produced using superheated steam impingement drying (130, and 145° C, h = 100 W/m² °C) had higher shrinkage, higher bulk density, lower porosity, smaller pores, and lighter color than air dried chips dried under the same temperature and convective heat transfer coefficient conditions. Moreover, superheated steam dried potato chips retained more vitamin C during the drying process. Superheated steam dried potato chips presented similar texture to fried commercial samples. The vitamin C content of the superheated steam dried chips was higher (25.48 mg/100g dry matter) than the fried potato slices (11.83 mg/100g dry matter).en_US
dc.format.mediumelectronicen_US
dc.format.mimetypeapplication/pdfen_US
dc.language.isoen_USen_US
dc.publisherTexas A&M Universityen_US
dc.rightsThis 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.en_US
dc.subjectagricultural engineering.en_US
dc.subjectMajor agricultural engineering.en_US
dc.titleImpingement drying of potato chipsen_US
dc.typeThesisen_US
thesis.degree.disciplineagricultural engineeringen_US
thesis.degree.nameM.S.en_US
thesis.degree.levelMastersen_US
dc.type.genrethesis
dc.type.materialtexten_US
dc.format.digitalOriginreformatted digitalen_US


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