Flavor comparison of ultra high temperature processed milk heated by Ohmic heating and conventional methods Public Deposited

http://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/x920g002q

Descriptions

Attribute NameValues
Creator
Abstract or Summary
  • Ultra high temperature (UHT) processing can extend shelf life of milk to several months without refrigeration, which is more convenient and energy saving than pasteurized milk. However, the poor acceptance caused by "cooked" flavors limits its marketing growth, especially in United States. Ohmic heating, which has a more uniform and rapid heating than conventional UHT process, may minimized the flavor change during the thermal treatment. Flavor composition between Ohmic heated UHT milk and other traditionally processed UHT milk (direct steam injection and indirect plate heating) during 36 weeks storage were investigated in this study. A total of 20 volatile compounds were analyzed based on their importance to UHT milk as well as their representation to different chemical classes including sulfur-containing compounds, ketones, lactones, aldehydes and others. Dimethyl sulfide (DMS) and methyl ketones were significant different among three types of UHT heated milk. δ-lactones showed higher amount in Ohmic heating after stored for four weeks, which might generate creamy, fruity intermediate aroma. Other compounds showed no significant difference among three heating processes. Aroma recombination test revealed that the overall aroma of the ultra pasteurized (UP) milk could be mimicked by recombining 15 important reference odorants in the same concentrations as they occurred in the UHT milk using commercial pasteurized milk as the matrix.
Resource Type
Date Available
Date Copyright
Date Issued
Degree Level
Degree Name
Degree Field
Degree Grantor
Commencement Year
Advisor
Committee Member
Academic Affiliation
Non-Academic Affiliation
Keyword
Subject
Rights Statement
Peer Reviewed
Language
Replaces
Additional Information
  • description.provenance : Submitted by Juan He (heju@onid.orst.edu) on 2012-04-05T21:28:46Z No. of bitstreams: 1 thesis.pdf: 762456 bytes, checksum: bb71434d3f980fa958be6e43ed566751 (MD5)
  • description.provenance : Approved for entry into archive by Laura Wilson(laura.wilson@oregonstate.edu) on 2012-04-10T18:48:28Z (GMT) No. of bitstreams: 1 thesis.pdf: 762495 bytes, checksum: 151884403f2870d83c8e3eebd99d12e5 (MD5)
  • description.provenance : Submitted by Juan He (heju@onid.orst.edu) on 2012-03-30T22:33:23Z No. of bitstreams: 1 thesis.pdf: 767038 bytes, checksum: ffd12311989cb5661a8b8d097ba80f9f (MD5)
  • description.provenance : Approved for entry into archive by Julie Kurtz(julie.kurtz@oregonstate.edu) on 2012-04-09T17:14:30Z (GMT) No. of bitstreams: 1 thesis.pdf: 762495 bytes, checksum: 151884403f2870d83c8e3eebd99d12e5 (MD5)
  • description.provenance : Made available in DSpace on 2012-04-10T18:48:28Z (GMT). No. of bitstreams: 1 thesis.pdf: 762495 bytes, checksum: 151884403f2870d83c8e3eebd99d12e5 (MD5) Previous issue date: 2012-03-20
  • description.provenance : Rejected by Julie Kurtz(julie.kurtz@oregonstate.edu), reason: Rejecting because the title page has the commencement date of June 17, 2012 and needs to be changed to June 2012. Thanks, Julie on 2012-04-06T15:34:47Z (GMT)
  • description.provenance : Submitted by Juan He (heju@onid.orst.edu) on 2012-04-03T23:45:26Z No. of bitstreams: 1 thesis.pdf: 767031 bytes, checksum: ba2fcd9a115b40d9c84342690cadbabc (MD5)
  • description.provenance : Submitted by Juan He (heju@onid.orst.edu) on 2012-04-07T05:17:17Z No. of bitstreams: 1 thesis.pdf: 762495 bytes, checksum: 151884403f2870d83c8e3eebd99d12e5 (MD5)
  • description.provenance : Rejected by Julie Kurtz(julie.kurtz@oregonstate.edu), reason: Rejecting to remove the page with the title before page one. Once revised, open the item that was rejected. Replace the attached file with the revised file and resubmit. Thanks, Julie on 2012-04-05T20:26:45Z (GMT)
  • description.provenance : Rejected by Julie Kurtz(julie.kurtz@oregonstate.edu), reason: Rejecting to change commencement date to - June 2012. Also remove the title page before the introduction, which is your page one, because it creates two page ones. Once revised, open the item that was rejected. Replace the attached file with the revised file and resubmit. Thanks, Julie on 2012-04-03T21:48:51Z (GMT)

Relationships

In Administrative Set:
Last modified: 08/03/2017

Downloadable Content

Download PDF
Citations:

EndNote | Zotero | Mendeley

Items