Scientists who measured levels of tiny, dangerous airborne particles in autorickshaws' backseats said they were the among the worst ever found in a regular form of transport, up to eight times higher than Delhi's already disastrous baseline pollution.
In their work, the two chemists measured out tiny amounts of lead and pigment and other stuff, weighing it carefully on a glass-sealed and apparently very delicate scale.
For the study, 678 adults (average age 63) delivered a speech while researchers measured their blood pressure and heart rate, took imaging pictures of their hearts, and measured the constriction of tiny arteries in their fingers.
Device can measure the distribution of tiny particles as they flow through a microfluidic channel.
Optical sensors inside the measure keep track of tiny holes in the tape itself and calculate the distance based on how many holes are counted.
He and Kent used a bandsaw to trim the samples into sugar cube-size blocks and inserted them into a magnetometer, which measured the polarity of tiny grains of the minerals hematite and magnetite contained in the sediment.
The PACS device was built by the Air Force Geophysics Laboratory at Hanscom Air Force Base in Massachusetts to measure the extent of tiny, almost invisible bits of debris in the shuttle's payload bay.
For example, Dr. Bill Rember, also of the University of Idaho, is looking at the leaf surfaces and measuring the densities of tiny pores used for gas exchange (called stomata) relative to what we see in today's leaves.
It measures the magnetic properties of tiny particles of iron oxide that are injected into the bloodstream.
This technique efficiently measures the relative velocity of tiny particles with respect to the fluid.
Like a dripping water faucet but with more complex physics behind it, a "drop on demand" system provides a precisely measured and timed supply of tiny liquid droplets containing whole or dissolved samples.
