Title page for ETD etd-11032005-101407

Type of Document Master's Thesis
Author Mittal, Surbhi
Author's Email Address smitta1@lsu.edu
URN etd-11032005-101407
Title Modeling and Experimentation of Drying of Adipose Derived Adult Stem Cells
Degree Master of Science in Mechanical Engineering (M.S.M.E.)
Department Mechanical Engineering
Advisory Committee
Advisor Name Title
Ram Devireddy Committee Chair
Dorel Moldovan Committee Member
Michael C Murphy Committee Member
  • adult stem cells
  • resonant sensor
  • ultrasound
Date of Defense 2005-10-26
Availability unrestricted
Development of protocols for storing desiccated cells at ambient temperatures offers tremendous economic and practical advantages over traditional storage procedures such as cryopreservation and freeze-drying. An integrated frame work of experimentation and modeling is adopted in the present work to develop procedures for storage of adult stem cells at ambient temperature. As a first step, we have measured the post-rehydration membrane integrity of two passages, Passage-0 (P0) and Passage-1 (P1), of human adipose-derived stem cells (hASCs). hASCs were dried using a convective stage at three different drying rates (slow, moderate and rapid) in D-PBS with trehalose (50 mM) and glycerol (384 mM). After drying the ASCs were stored for 48 hrs, in three different conditions: i) at ambient temperature, ii) in plastic bags at ambient temperature and iii) in vacuum sealed plastic bags at ambient temperature. Post-rehydration membrane integrity was assessed after incubating the rehydrated ASCs. Also, the understanding of the entire drying procedure was extended by theoretically developing a novel ultrasound resonant sensor capable of quantifying the rate of water loss in real time. The sensor has been modeled as a conservative beam system and accounts for the effect on the fundamental frequency due to change in mass during drying when excited by ultrasound.
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