A simple weighing method for spherical cells

Qili Zhao, Bijan Shirinzadeh, Maosheng Cui, Mingzhu Sun, Xin Zhao

Research output: Contribution to journalArticleResearchpeer-review

3 Citations (Scopus)


This article presents a simple weighing method for spherical cells to avoid the high cost of correlated devices in traditional cell-weighing methods. In this method, the constant falling speeds of the spherical objects in liquid are derived to estimate their masses online. Using this method, the detected density of one type of microbead is highly in accordance with the known value. This method is proved to be capable of detecting tiny variations of the cell mass (at least within 1% of the cell mass). Finally, the proposed method is applied in nuclear transplantation operations, and, for the first time, the proper amount of the removed cytoplasm in porcine enucleation is estimated. The proposed method is able to weigh cells with a success rate of 92% at an average speed of 22 s/cell, and it can be performed on traditional microoperation systems, which makes it easily applicable in biological applications.
Original languageEnglish
Pages (from-to)471 - 480
Number of pages10
JournalJournal of Laboratory Automation
Issue number4
Publication statusPublished - 25 Aug 2015


  • Mass detection of cells
  • Depth information
  • Microoperation system
  • Template matching
  • Nuclear transplantation
  • Cell operation

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