Particle Size Analysis

Fluid Jets with a Diameter of 20 to 150 Nanometers

A researcher from Northwestern University, together with collaborators from Cambridge University and Centro Nacional de Biotecnologia, have verified the Landau-Squire theory in the smallest submerged jet.

The diameter of the jets used were between 20 and 150 nanometers which corresponds with the length of only a few hundred water molecules positioned in a row.

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Tracking and Measurement Standards Approved By Nanoparticle Committee

The ASTM International Nanoparticle Committee has recently approved two new standards for measuring and tracking nanomaterial.

The two standards that have been approved by the committee are ASTM E2859, the Guide for Size Measurement of Nanoparticles Using Atomic Force Microscopy, and ASTM E2834, which is the Guide for Measurement of Particle Size Distribution of Nanomaterials in Suspension by Nanoparticle Tracking Analysis (NTA).

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Nanotechnology Definition Used Too Broadly

The term ‘nanotechnology’ has been used so abundantly (and often inaccurately) that even Eric Drexler, the researcher who coined the term, believes the word is losing its original meaning.

Nanotech involves the manipulation of matter on atomic and molecular scales. However, it is presently used in reference to micro-scale technology for everything from biotech to space technology.

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Tiny Particles Create Big Health Threats

Health experts are warning that tiny particles of pollution can pose an enormous threat to human health when they enter the lungs and work their way through the body.

Steve Hambleton, Head of the Australian Medical Association, is set to inform a senate inquiry into air quality that Australia’s rules fail to adequately protect human health. Australia now lags behind the rest of the developed world in this regard and has not kept up to speed with scientific evidence.

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Finer Grind Sizes Now a Necessity for Mineral Recovery

The demand for ore bodies is on the rise, however ore grades are decreasing around the world. In order to recover the maximum amount of minerals and a high grade, finer grind sizes will be needed.

The ore industry is having to tackle the challenge of increasingly complex ore bodies as well as the need for increased energy efficiency. One possible solution is the High Intensity Grinding (HIG) mill that is designed specifically for complex and fine grain ore.

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Maritime Engineer Assesses Ballast Water Treatment

Bill Davidson is the chief engineer on California Maritime Academy’s vessel ‘Golden Bear’ which is used predominantly for training and research. He recently brought his practical experience to assess different ballast water treatment systems while they are in their testing stages of development.

Davidson is hoping to use his experience to affect the ballast water treatment systems that are coming to market. He said that it important for the systems to be simple, reliable and easy to use.

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Proposed ASTM Standard for Stormwater Hydrodynamic Systems

Stormwater hydrodynamic systems help to prevent contamination caused by stormwater runoff by removing certain settable solids.

A new ASTM International standard is set to be implemented which will specify test material that has a common particle size distribution and can be used to test hydrodynamic systems.

The proposed standard ASTM WK39909, Specification for Surrogate Test Solids for Measuring Performance of Stormwater Treatment Devices, is currently being developed.

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Geoneutrinos Hold Vital Information About Planet Earth

The discovery of a number of particles from deep within the Earth could hold vital information about the amount of heat produced by the planet. The same particles may also prove that Earth was formed from materials derived from the sun.

These particles are called geoneutrinos. They are also the opposite of neutrinos (particles that are both exotic and fundamental that are able to pass directly through Earth), which form deep within the core of the Earth.

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Biodegradable Nanospheres Created Using Continuous Flow Process

Biodegradable and composed of poly (lactide-coglycolide) (PLGA) or other materials, microspheres and nanospheres represent significant systems for drug and antigen delivery. They also create the possibility for targeting of drugs and antigens.

Despite the hope and promise offered, techniques presently used to create PLGA nanospheres give rise to a range of complications when they are upscaled using sterile conditions.

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Physicists Hopeful of a Higgs Boson Find

Confidence is rising that physicists have found a Higgs boson – a particle that provides crucial information for explaining the universe.

New data has been reviewed by physicists and has generated much enthusiasm about the possible discovery of the Higgs boson.

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