News tagged with concentration

Thermodiffusion in weightlessness

Thermodiffusion, also called the Soret effect, is a mechanism by which an imposed temperature difference establishes a concentration difference within a mixture. Two studies by Belgian scientists from the Free University ...

dateOct 27, 2014 in General Physics
shares0 comments 1

Measuring phosphorus loss from Midwest crop fields

Field runoff from farms in the Lake Erie basin is often rich in soluble plant nutrients, including phosphorus. When this nutrient-rich runoff reaches the lake, the phosphorus can support abundant algal blooms that contaminate ...

dateJan 29, 2015 in Environment
shares23 comments 0

Portable frequency comb rolls out of the lab

A PML team is hitting the road with a fine-tooth comb. Scientists in the Quantum Electronics and Photonics Division have devised a portable optical frequency comb that is capable of laboratory-grade measurements but can be ...

dateMar 21, 2014 in General Physics
shares0 comments 0

Using less fish to test chemicals safety

The JRC has released a new strategy on how to replace, reduce and refine the use of fish in testing of chemicals' effect on flora and fauna in water (aquatic toxicity) and chemicals' uptake and concentration in living organisms ...

dateJan 22, 2015 in Environment
shares16 comments 0

Team models sudden thickening of complex fluids

(—A new model by a team of researchers with The City College of New York's Benjamin Levich Institute may shed new understanding on the phenomenon known as discontinuous shear thickening (DST), in which the resistance ...

dateJan 16, 2014 in Soft Matter
shares0 comments 0

First 3-D movies of living sperm

To improve their chances of success, in vitro fertilization (IVF) clinics need to assess the viability of the sperm they use. Now doctors may soon have a new technique to help them sort the good sperm cells from the less ...

dateFeb 11, 2014 in Cell & Microbiology
shares0 comments 0