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Mechanical Mapping of Spheroids Using Brillouin Spectroscopy

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Published on: December 12, 2025

A Simple Weighing Method for Spherical Cells.

Qili Zhao¹, Bijan Shirinzadeh², Maosheng Cui³

¹Institute of Robotics and Automatic Information System, Tianjin Key Laboratory of Intelligent Robotics, Nankai University, Tianjin, China Robotics and Mechatronics Research Laboratory, Department of Mechanical and Aerospace Engineering, Monash University, Clayton, Australia.

Journal of Laboratory Automation

|April 26, 2015

Summary

This summary is machine-generated.

This study introduces a simple, cost-effective cell weighing method using falling speeds in liquid. The technique accurately measures cell mass variations and has applications in biological procedures like nuclear transplantation.

Keywords:

cell operation depth information mass detection of cells microoperation system nuclear transplantation template matching

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Area of Science:

Biophysics
Cell Biology
Microfluidics

Background:

Traditional cell-weighing methods are often expensive due to specialized equipment.
Accurate cell mass determination is crucial for various biological applications, including assisted reproduction and diagnostics.

Purpose of the Study:

To develop a simple, low-cost method for online cell mass estimation.
To validate the accuracy and sensitivity of the proposed cell weighing technique.
To demonstrate the practical application of the method in nuclear transplantation.

Main Methods:

Utilizing the constant falling speeds of spherical cells in a liquid medium to infer mass.
Implementing the method on traditional microoperation systems for accessibility.
Online estimation of cell mass based on derived falling velocities.

Main Results:

The method achieved high accuracy, with microbead density measurements aligning with known values.
Demonstrated sensitivity to detect cell mass variations as small as 1%.
Successfully applied to estimate removed cytoplasm during porcine oocyte enucleation with 92% success rate.

Conclusions:

The developed method offers a simple, cost-effective, and accurate approach to cell weighing.
The technique is sensitive enough for detecting subtle mass changes and applicable to biological processes.
This method enhances the feasibility of precise cell manipulation in various research and clinical settings.