Listening to cells: Scientists probe human cells with high-frequ... (ometers. For comparison a cell's nucleu...)

Listening to cells: Scientists probe human cells with high-frequency sound

Date:2/1/2013

ometers." For comparison, a cell's nucleus is about 10,000 nanometers wide.

The team faced challenges in applying picosecond ultrasonics to study biological systems. One challenge was the fluid-like material properties of the cell. "The light scattering process we use to detect the mechanical properties of the cell is much weaker than for solids," says Audoin. "We had to improve the signal to noise ratio without using a high-powered laser that would damage the cell." The team also faced the challenge of natural cell variation. "If you probe silicon, you do it once and it's finished," says Audoin. "If you probe the nucleus you have to do it hundreds of times and look at the statistics."

The team developed methods to overcome these challenges by testing their techniques on polymer capsules and plant cells before moving on to human cells. In the coming years the team envisions studying cancer cells with sound. "A cancerous tissue is stiffer than a healthy tissue," notes Audoin. "If you can measure the rigidity of the cells while you provide different drugs, you can test if you are able to stop the cancer at the cell scale."

'/>"/>

Contact: Ellen R. Weiss
eweiss@biophysics.org
240-290-5606
American Institute of Physics
Source:Eurekalert

0

GOOD

Page: 1 2
Related biology news :

1. From the Amazon rainforest to human body cells: Quantifying stability
2. Programming cells: The importance of the envelope
3. Stanford scientists develop gene therapy approach to grow blood vessels in ischemic limbs
4. Queens scientists seek vaccine for Pseudomonas infection
5. Scientists produce eye structures from human blood-derived stem cells
6. American Society of Plant Biologists honors early career women scientists
7. Brandeis scientists win prestigious prize for circadian rhythms research
8. Scientists discover new method of proton transfer
9. Salk scientists open new window into how cancers override cellular growth controls
10. WileyChina.com - Now Featuring Bespoke Pages for China’s Life Scientists
11. Scientists win $2 million to study new pathway in development and maintenance of lymphoma

Post Your Comments:

(Date:6/18/2013)... chemical modification of DNA and this modification can ... sequence. Until now, scientists believed that this epigenetic ... Today, a team of researchers from the University ... Louis-Jeantet Professor at the Faculty of Medicine, reveals ... that DNA methylation may play both a passive ...

(Date:6/18/2013)... shows that weight gain and increased head size in the ... IQ at early school age. , The study was led by ... than 13,800 children who were born full-term. , The results, published ... who put on 40% of their birthweight in the first four ... were six years of age, compared with babies who only put ...

(Date:6/17/2013)... in Vietnam and other locations with central nervous system ... a newly discovered virus, according to a study to ... journal of the American Society for Microbiology. Researchers have ... of 642 patients with central nervous system infections of ... of fecal samples from pigs and poultry, suggesting animals ...

Breaking Biology News(10 mins):The secret of DNA methylation 2 IQ link to baby's weight gain in first month 2 New virus discovered in patients with central nervous system infections 2 New virus discovered in patients with central nervous system infections 3

[0] The secret of DNA methylation [0] IQ link to baby's weight gain in first month [0] New virus discovered in patients with central nervous system infections

... medical researcher at the University of Alberta is working with scientists ... markers for autism. More than 15 scientists will examine DNA samples ... the siblings are at high risk. , , And if ... before symptoms develop? , , If theres a family of ...

... that expand on the teachings of Mendel, Watson and Crick, ... companies along the path to development of new medicines based ... code influence health and disease. That,s the topic of the ... Engineering News (C&EN), the weekly newsmagazine of the American ...

... The feeding habits of mammals haven,t always been what ... mammals almost exclusively eat meat--take lions and tigers and other ... cows and antelope are predominantly plant-eaters, living on a diet ... omnivores that live on plant foods in addition to meat, ...

Cached Biology News:Researchers across North America team up to find genetic markers for autism 2 Not by DNA alone: How the epigenetics revolution is fostering new medicines 2 Scientists trace evolutionary history of what mammals eat 2

Researchers across North America team up to find genetic markers for autism Not by DNA alone: How the epigenetics revolution is fostering new medicines Scientists trace evolutionary history of what mammals eat

(Date:6/19/2013)... BioConvergence team members Curtis Strother and ... BioLogistics Summit in San Francisco earlier this month. ... IQ and IQPC, addressed the increasingly complex logistical ... attributed to current trends of globalization, outsourcing, and ... is an increase in movement, which is often ...

(Date:6/19/2013)... Express Diagnostics Int’l, Inc., manufacturer of DrugCheck® ... has received Class III medical device license approval from ... NxStep Onsite Drug Screen Cup in Canada. Class ... in near-patient settings, such as physicians’ offices. , The ... Class III approval for 24 different drugs and detection ...

(Date:6/18/2013)... Cord Blood Corporation (NYSE: CO ) ("CCBC" ... collection, laboratory testing, hematopoietic stem cell processing, and stem ... results for the fourth quarter and full year of ... Fourth Quarter of Fiscal 2013 Highlights , ... by 33.3% to RMB133.0 million ($21.4 million) from RMB99.8 ...

(Date:6/18/2013)... Demanding industrial and environmental conditions are ... Sapphire and Glass Ball Lenses, now available in an ... Company , of Philadelphia , PA. , Optical Ball ... light beams without the need for direct physical contact. ... (9 mohs) make it the ideal choice for fiber-optic ...

[0] BioConvergence® Presents at BioLogistics Summit on Risk Matrix for Biosamples during Shipment [0] Express Diagnostics’ DrugCheck® On-site Test Cup Receives Health Canada Class III Medical Device Approval [0] China Cord Blood Corporation Reports Financial Results for the Fourth Quarter and Full Year of Fiscal 2013 [0] Swiss Jewel Introduces the Crown Jewels of Fiber-Optic Connectors

... available in Spanish and French . , ... From this fibrous diet consisting mainly of the tough to degrade ... value to most animals, ruminants manage to extract all they need ... now, the cow, or rather the network of organisms working unseen ...

... composed of gold nanoparticles and viral particles, woven together ... structure a distinctive mix of hard, metallic nanoparticles ... the very stuff of life, DNA marks a ... of materials to create infinitesimal devices. The research, ...

... The Alzheimer,s Drug Discovery Foundation (ADDF) announced ... $195,000 to ALS Biopharma, LLC to develop therapeutics ... disease. (Logo: http://photos.prnewswire.com/prnh/20090805/DC57332LOGO ) ... brain-penetrant inducers of heat shock protein 70 (Hsp70). ...

Cached Biology Technology:How now, inside the cow: Nearly 30,000 novel enzymes for biofuel production improvements 2 How now, inside the cow: Nearly 30,000 novel enzymes for biofuel production improvements 3 How now, inside the cow: Nearly 30,000 novel enzymes for biofuel production improvements 4 How now, inside the cow: Nearly 30,000 novel enzymes for biofuel production improvements 5 A mix of tiny gold and viral particles -- and the DNA ties that bind them 2 Alzheimer's Drug Discovery Foundation Funds ALS Biopharma to Develop Small Molecules for Alzheimer's Disease 2

How now, inside the cow: Nearly 30,000 novel enzymes for biofuel production improvements A mix of tiny gold and viral particles -- and the DNA ties that bind them Alzheimer's Drug Discovery Foundation Funds ALS Biopharma to Develop Small Molecules for Alzheimer's Disease

... derived from Paraffin embedded tissue blocks, which ... to ensure the highest quality. Tissues of ... block, sectioned at a thickness of 5 ... are large (3-5 mm in diameter) in ...

... Zyagen tissue microarrays are derived from ... to rigorous quality control procedures to ensure ... are manually assembled in one block, sectioned ... on coated slides. Sections are large (3-5mm ...

... microarrays are derived from Paraffin embedded tissue ... control procedures to ensure the highest quality. ... in one block, sectioned at a thickness ... slides. Sections are large (3-5mm in diameter) ...

... Microdissection , CapSure HS and CapSure Macro ... extraction of populations of pure cells from ... Capture Microdissection., Ensure the Integrity of ... All CapSure LCM Caps have a patented ...

Biology Products:

Rat Paraffin Reproductive Tissue Microarray from Zyagen Laboratories Mouse Frozen Mixed Tissue Microarray, Panel -3 from Zyagen Laboratories Mouse Paraffin Digestive Tissue Microarray from Zyagen Laboratories CapSure Macro LCM Caps - Bulk Pack from Arcturus, now part of Molecular Devices