This application note will benefit chemical and material manufacturers concerned about micron and submicron par ticle contamination. Outliers are a common problem in many industrial applications. Outliers can be defined as particles that are significantly larger or smaller than the main particle size distribution, but which occur in a much lower frequency than the main par ticle size. As a simp...

In the present work, the motion of metallic and plastic particles of 5 mm diameter falling in a quiescent fluid is investigated experimentally. The goal of this investigation is to examine the effect of history force acting on a particle in a range of Reynolds numbers between 1000 and 5000. The instantaneous position of the particle was recorded using a high - speed camera (500 to 1000 frames p...

Full-length measles virus RNA molecules isolated from purified virions or nucleocapsids and examined by electron microscopy were 5.12(+/- 0.12) micron in length, corresponding to a molecular weight of 5.2 (+/- 0.1) X 10(6). Purified virions examined by negative staining in the electron microscope exhibited a pleomorphic range of particle sizes varying in diameter between 300 nm and 1000 nm. Pur...

We compared the effect of ambient temperature observed in two different seasons on the size distribution and particle number concentration (PNC) as a function of distance (up to ~250 m) from a major traffic road (25% of the vehicles are heavy-duty diesel vehicles). The modal particle diameter was found between 10 and 30 nm at the roadside in the winter. However, there was no peak for this size ...

LDL particle sizes and Apo E phenotypes were determined in 212 subjects of whom 51 had angina. LDL diameter was significantly less in subjects with an epsilon2 allele (24.76+/-0.08 vs 24.94+/-0.02 nm, P=0.02), and this was evident for both E2/E3 (24.77+/-0.09 nm) and E2/E4 (24.69+/-0.08 nm) phenotypes. Although there was a negative relation between LDL diameter and plasma triglyceride, the effe...

We present measurements of aerosols acquired with a differential mobility analyzer – condensation particle counter (DMA-CPC) system aboard a P-3 flight from Miami, FL to Bermuda during Hurricane Erika in 1997. We have analyzed particle number densities as a function of particle diameter, wind speed, and distance from the eye of the hurricane. Our results indicate that particles with diameters l...

The Earth’s atmosphere is an environment replete with particles of differ-ent sizes with various refractive indices which affect the light radiation traveling through it. The Mie scattering theory is one of the well-known light scattering techniques ap-plicable to modeling of electromagnetic scattering from tiny atmospheric particles or aerosols floating in the air or within the clouds. In this...

PURPOSE A physics-based model of a general magnetic drug targeting (MDT) system was developed with the goal of realizing the practical limitations of MDT when electromagnets are the source of the magnetic field. METHODS The simulation tracks magnetic particles subject to gravity, drag force, magnetic force, and hydrodynamic lift in specified flow fields and external magnetic field distributio...

Our recent work [1] theoretically revealed that speckles can be formed when nanofluids containing a modest volume fraction of nanoparticles are illuminated by a monochromatic laser beam. This paper focuses on the key issues, including the experimental setup, the particle volume fraction of the nanofluid, the flow velocity of the nanofluid and the diameter of the pipe, in measuring the velocitie...

The authors used albumin aggregates whose diameters were stated to range from 15 μm to 50 μm. Assuming radioactivity relates to particle mass, not diameter, 50 μm particles would be 37 times hotter than 15 μm particles ((50/15) = 37). If the abnormal vascular channels at their narrowest exceeded 50 μm diameter, this inhomogeneity of size may have posed no problem. If any were less than 50 μm bu...