Navigation Links
Is it alive or dead?
Date:6/28/2013

WASHINGTON D.C., June 27, 2013 -- To the ancients, probing the philosophical question of how to distinguish the living from the dead centered on the "mystery of the vital heat." To modern microbiology, this question was always less mysterious than it was annoying -- researchers have known that biological processes should produce thermal signatures, even within single cells, but nobody ever knew how to measure them.

Now, a group of mechanical engineers from Pohang University of Science and Technology in Korea have discovered a way to measure the "thermal conductivity" of three types of cells taken from human and rat tissues and placed in individual micro-wells. They showed that they could detect uniform heat signatures from the various cells and measured significant difference between dead and living ones, suggesting a new way to probe cells for biological activity.

A lone cell is fantastically small, often only about 10 microns across (10 millionths of a meter), and this size has thwarted thermodynamic measurements of single cells. Writing in the journal Applied Physics Letters, a team led by Dongsik Kim and Jaesung Park describes how their novel nanoscale biosensing technique can measure the thermal conductivity of a single cell.

"In the short-term, this biosensing technique can be used to measure cell viability," said Kim. "In the long-term, we hope to refine it to develop a non-invasive, rapid means for early diagnosis of diseases such as cancer based on differences in the thermal properties of cells."

While the fundamental heat signatures the researchers detected are not exactly what the ancient philosophers imagined, measuring them may answer more mysteries than they could have dreamed.


'/>"/>

Contact: Jason Socrates Bardi
jbardi@aip.org
240-535-4954
American Institute of Physics
Source:Eurekalert

Page: 1

Related biology news :

1. Dead or alive? A new test to determine viability of soybean rust spores
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:6/7/2016)... June 7, 2016  Syngrafii Inc. and San ... relationship that includes integrating Syngrafii,s patented LongPen™ eSignature ... This collaboration will result in greater convenience for ... union, while maintaining existing document workflow and compliance ... ...
(Date:6/2/2016)... June 2, 2016 Perimeter Surveillance ... Unmanned Systems, Physical Infrastructure, Support & Other Service  ... visiongain offers comprehensive analysis of the global ... will generate revenues of $17.98 billion in 2016. ... Inc, a leader in software and hardware technologies for ...
(Date:5/16/2016)... NEW YORK , May 16, 2016   ... authentication solutions, today announced the opening of an IoT ... to strengthen and expand the development of embedded ... provides an unprecedented level of convenience and security with ... to authenticate one,s identity aside from DNA. EyeLock,s platform ...
Breaking Biology News(10 mins):
(Date:6/23/2016)... ... June 23, 2016 , ... Mosio, ... second eBook, “Clinical Trials Patient Recruitment and Retention Tips.” Partnering with experienced clinical ... eBook by providing practical tips, tools, and strategies for clinical researchers. , “The ...
(Date:6/23/2016)... , June 23, 2016 Houston Methodist ... the Cy-Fair Sports Association to serve as their ... agreement, Houston Methodist Willowbrook will provide sponsorship support, ... connectivity with association coaches, volunteers, athletes and families. ... the Cy-Fair Sports Association and to bring Houston ...
(Date:6/23/2016)... ... June 23, 2016 , ... Supplyframe, the Industry Network for ... Design Lab . Located in Pasadena, Calif., the Design Lab’s mission is to ... are designed, built and brought to market. , The Design Lab is Supplyframe’s ...
(Date:6/23/2016)... -- Andrew D Zelenetz , ... Published recently in Oncology & ... Andrew D Zelenetz , discusses the fact ... placing an increasing burden on healthcare systems worldwide, ... the patents on many biologics expiring, interest in ...
Breaking Biology Technology: