Median particle size. Medical search. Frequent questions

D = 2 3 W 4 π d g 3 {\displaystyle D=2{\sqrt[{3}]{\frac {3W}{4\pi dg}}}} where D {\displaystyle D} : diameter of representative sphere W {\displaystyle W} : weight of particle d {\displaystyle d} : density of particle g {\displaystyle g} : gravitational constant Aerodynamic particle size Hydrodynamic or aerodynamic particle size equals the diameter of the sphere that has the same drag coefficient as a given particle. (wikipedia.org)
Aerodynamic size characteristics were measured by cascade impactors. (cdc.gov)
The aerosol size distributions produced by the generators used, in mass median aerodynamic diameter, were 1-3 μm and had a geometric heterodispersity of ≈1.2-1.4. (cdc.gov)
The dashed green line represents the 0.3 um mass median aerodynamic diameter (MMAD) sodium chloride aerosol used by NIOSH for respirator filter testing of N95-class air purifying respirators. (cdc.gov)
The 2nd stage seed-cotton cleaning system particle size distributions were characterized by an average mass median diameter of 12.2 µm (aerodynamic equivalent diameter). (cotton.org)
According to the IUPAC definition, the equivalent diameter of a non-spherical particle is equal to a diameter of a spherical particle that exhibits identical properties (e.g. aerodynamic, hydrodynamic, optical, electrical) to that of the investigated non-spherical particle. (anton-paar.com)
b) Evidence for the particle size or fiber dimension hazard trait includes, but is not limited to: measures of particle size less than or equal to 10 micrometers in mass median aerodynamic diameter for inhalation exposure, or less than 10 micrometers in any dimension for dermal or ingestion exposure, or fibers with a 3:1 aspect ratio and a width less than or equal to 3 micrometers. (lawbc.com)
These include assessing the total quantity of drug emitted from the device and therefore available to the patient, and the aerodynamic size of the particles that make up the emitted aerosol. (ondrugdelivery.com)

The mass median diameter of particles was approximately 9.6 microns. (cdc.gov)
Fecal particles, containing microorganisms and proteolytic enzymes, ranged from 2 to 0.4 microns in diameter and represented the major dust burden to the alveoli. (cdc.gov)
The extra-fine grade has no particles greater than 12 microns (as determined by laser diffraction) and is suitable for more critical flame retardant applications. (borax.com)
Particle size (10-110 microns). (tkbtrading.com)
Retention of dust will be at its peak, depending on the nature of dust, for the particles whose diameter ranges from 0.5 to 3 microns. (digitalfire.com)
The #1 pad removes large particulate from wine down to 5 microns in size. (olivewoodbrewing.com)
The #3 pad removes very small particulate from wine down to 0.5 microns in size. (olivewoodbrewing.com)
This grade of diatomaceous earth has an average particle size of 10 microns and an average pore diameter of 1.2 microns resulting in a fine powder. (olivewoodbrewing.com)

Recalculation of the intensity-based distribution to a number- and volume-based one is possible when the refractive index of the particles is known. (anton-paar.com)
If a specific wavelength of the beam encounters a particle, the particle produces an electromagnetic vibration at the same frequency as the emitted light source - irrespective of the wavelength of the light, the particle diameter, and the refractive index of the particles and the medium. (mcctcarbide.com)
According to the Mie theory, it is possible to produce multiple oscillations of various probabilities, and there is a certain relationship between the cross section of the optical action and the particle size, the wavelength of light and the refractive index of the particles and the medium. (mcctcarbide.com)

As a general rule, the smaller the diameter of particles, the more efficient is the pulmonary clearance by the bronchi and acini. (digitalfire.com)

There is often a need for a certain average particle size for the ensemble of particles. (wikipedia.org)
Disadvantages: can only get the average particle size, can not measure the particle size distribution.Laser method: Advantages: easy to operate, fast test, test range, repeatability and accuracy, and can be measured online and dry. (mcctcarbide.com)

Although we performed experiment only once across several laboratories, our findings suggest retained infectivity and virion integrity for up to 16 hours in respirable-sized aerosols. (cdc.gov)
Typical particle sizes found in various workplace and environmental aerosols. (cdc.gov)
The abundance of viral copies in fine particle aerosols and evidence for their infectiousness suggests an important role in seasonal influenza transmission. (cdc.gov)
We sought to determine the total number of viral RNA copies present in exhaled breath and cough aerosols, whether the RNA copies in fine particle aerosols represent infectious virus, and whether surgical facemasks reduce the amount of virus shed into aerosols by people infected with seasonal influenza viruses. (cdc.gov)
Here, we report our measurement of the gas-particle partition coefficient ( K p ) for weakly polar (trichloroethylene, TCE) and moderately polar ( n -butanol, n -BuOH) VOCs under varying relative humidity (RH) levels onto organic and inorganic aerosols. (aaqr.org)
6 This suggests that aerosols with a finer particle-size distribution could exhibit behaviour that is relatively independent of flow rate, a feature that would enable the delivery of more controlled deposition across patient groups with different inspiratory profiles. (ondrugdelivery.com)
How do aerosols of extra-fine particles behave? (ondrugdelivery.com)
Measurements of particle number size distribution, scattering, and radiation absorption were used and the chemical composition of aerosols, together with remote sensing data. (usp.br)

5 µm) aerosol particles and that the fine particles from cases with the highest total number of viral RNA copies contained infectious virus. (cdc.gov)
Results suggest preferential sorption of the VOCs onto inorganic aerosol particles than onto organic aerosol particles. (aaqr.org)
35% onto inorganic aerosol particles, whereas the K p declined slowly onto organic aerosol particles. (aaqr.org)
Partitioning of the VOCs onto organic aerosol particles was less dependent on RH levels while partitioning onto inorganic aerosol particles was important only at low RH levels. (aaqr.org)
At lower RH, partitioning proceeded by adsorbing onto the aerosol particles. (aaqr.org)
For organic aerosol particles, partitioning may be dominated by adsorption at all RH levels. (aaqr.org)
At increasing RH levels, both VOCs partitioning onto in/organic aerosol particles exhibited similar behavior (exponential) consistent to those observed for 1,2-dichlorobenzene, therefore, insensitive to the polarity. (aaqr.org)
However, at a similar RH level, polarity affects the mass fraction of the VOCs that sorbed onto the aerosol particles. (aaqr.org)
Cloud and precipitation properties depend strongly on the atmospheric dynamics and moisture sources and transport, as well as on aerosol particles, which can act as cloud condensation and ice nuclei. (copernicus.org)
The analysis of the occurrence of aerosol particles growth was focused on particles from 10 to 50 nm, with measurements between February 2014 and September 2020. (usp.br)

This report is part of a project to characterize cotton gin emissions from the standpoint of total particulate stack sampling and particle size analyses. (cotton.org)
The objective of this study was to characterize particulate emissions for 2nd stage seed-cotton cleaning systems from cotton gins across the cotton belt based on particle size distribution analysis of total particulate samples from EPA-approved stack sampling methods. (cotton.org)
Average measured PM 2.5 , PM 6 , and PM 10 emission factors based on the mass and particle size analyses of EPA Method 17 total particulate filter and wash samples from five gins (14 total test runs) were 0.0014 kg/227-kg bale (0.0031 lb/500-lb bale), 0.015 kg/bale (0.032 lb/bale), and 0.025 kg/bale (0.056 lb/bale), respectively. (cotton.org)
In this article, I will show that carbon dioxide is not the driver, but a (useful) indicator of fossil burning and production processes that create nano sized particles (and particulate matter) which do affect climate shifts via coagulation and nucleation. (scirp.org)

Also known as the median diameter. (terasolartisans.com)

We also consulted material on grind size produced by the KRUVE company, which produces a set of sieves for isolating a specific micron range of coffee particles for more refined brewing. (coffeereview.com)
Quartz particles in the occupational setting range widely in size, but those less than 1 micron are believed to be the most pathogenic. (digitalfire.com)
The size of silica particles retained in the human lung is remarkably constant, with median diameters ranging from 0.5 to 0.7 micron. (digitalfire.com)
Indeed, studies investigating the deposition sites of extra-fine and sub-micron particles have found that it is possible that these particles could in fact be effectively delivered to the small airways in the deep lung. (ondrugdelivery.com)
If particles around one micron and smaller are not simply exhaled then there are possible implications in terms of the sites of deposition with the lung, the dose received by the patient and the therapeutic activity of the drug. (ondrugdelivery.com)

Particle number concentrations of ultrafine particles in mainstream smoke during waterpipe smoking ranged up to 70 x 10(9) particles per litre. (who.int)
CONCLUSIONS: Waterpipe smoking emits large amounts of ultrafine particles. (who.int)
Disadvantages: the test range is small, easy to be blocked by particles, the media should have strict electrical characteristics.Electron microscopy: Advantages: suitable for testing ultrafine particles or even nano-particles, high resolution. (mcctcarbide.com)

Sediment bulk density and particle size distributions were characterized from streambank and channel deposit samples and used for volume to mass conversions and for comparison with other sediment sources. (usgs.gov)

Count median diameters of the smoke ranged from 0.33 to 0.63 micrometers with geometric standard deviations ranging from 1.35 to 2.13. (cdc.gov)
The DLS particle size analysis technique and laser diffraction method provide results which are based on different equivalent diameters and weighting models. (anton-paar.com)

Particle size is a notion introduced for comparing dimensions of solid particles (flecks), liquid particles (droplets), or gaseous particles (bubbles). (wikipedia.org)
The Malvern Panalytical Spraytec uses the technique of laser diffraction for measurement of the size of spray droplets and spray particles. (terasolartisans.com)
In situ characterization of droplets and particles in the marine environment is an important component of Environmental Baseline Surveys (EBSs) and spill response activities. (csaocean.com)

Machine learning algorithms are used to increase the performance of particle size measurement. (wikipedia.org)
Interpreting results of a particle size measurement requires an understanding of which technique was used and the basis of the calculations. (horiba.com)
Malvern Panalytical's unique, practical laser diffraction particle size analysis know-how enables the Mastersizer to deliver results you can rely on, with data quality analysis that empowers both particle sizing experts and measurement novices to deliver insight and results you can trust. (terasolartisans.com)

The most important novelty of this study is related to experimental validation of the numerical results using the Particle Image Velocimetry (PIV) technique and through direct measurements of gas mass flow rates, with a clear correlation between simulated and measured data. (unav.edu)
Two-dimensional flow velocities were visualized by laser particle image velocimetry. (springer.com)

Typically used in sieve analysis, as shape hypothesis (sieve's mesh size as the sphere diameter). (wikipedia.org)
I have been carrying out sieve analysis to estimate the median particle size of a powder. (stackexchange.com)

This formula is only valid when all particles have the same density. (wikipedia.org)
Particle capture or collection by a respirator filter depends on the physical characteristics of the particle - shape, size and density. (cdc.gov)

The above quantitative definition of particle size cannot be applied to non-spherical particles. (wikipedia.org)
There are several ways of extending the above quantitative definition to apply to non-spherical particles. (wikipedia.org)
However, any kind of recalculation will introduce an error that adds to the initial one related to the assumption of spherical particles. (anton-paar.com)
It describes the uniform spherical particles in the uniform, non-absorbing medium and its surroundings in the space of the radiation, the particles can be completely transparent or can be completely absorbed. (mcctcarbide.com)

The Mastersizer 3000 uses the technique of laser diffraction to measure the particle size and particle size distribution of materials. (terasolartisans.com)
Zetasizer range Instruments in the Zetasizer family are used to measure the particle size of dispersed systems from sub-nanometer to several micrometers in diameter, using the technique of Dynamic Light Scattering (DLS). (terasolartisans.com)

The test aerosol should be charge neutralized (have an equal distribution of positively and negatively charged particles), because charge neutralization has been shown to lower the filter collection of particles. (cdc.gov)
However, because of electrical charge, caused by friction or due to anthropogenic negatively charged nano structured particle, emissions will travel up to the lower stratosphere and become neutralized at the electro sphere level, and they do also have a tendency to move to the Arctic. (scirp.org)

Important pharmacokinetic and pharmacodynamic characteristics that can enhance the efficacy of ICS include small particle size, high glucocorticoid-receptor-binding affinity, long pulmonary residence time and lipid conjugation. (ersjournals.com)

Chronic obstructive pulmonary disease (COPD) is characterized by progressive, difficult-to-reverse, chronic limitation of the airflow 1 that is associated with an abnormal inflammatory lung response to harmful particles or gases, especially tobacco, with significant systemic repercussions. (dovepress.com)
Better understanding of these parameters and their interrelationship helps to maximise the benefits and efficiency of pulmonary drug delivery systems but the majority of such research has focused on the behaviour of particles within the 1-5 µm range, which are known to deposit successfully in the pulmonary region. (ondrugdelivery.com)

Using mortality data, an estimate of the acute oral median lethal dose (LD50) of the test material was made. (europa.eu)
For example, polonium-210 (Po-210) has a specific activity of 166 terabecquerels per gm (TBq/g), and 1 mcg (about the size of a grain of salt) of Po-210 delivers a whole body dose of 50 Sv (~20 times the median lethal dose). (msdmanuals.com)

The only nano particles known in nature are those who are limited produced from volcano eruptions and natural forest fires. (scirp.org)
A novel ultra-fine dust electric reduction device (UFDRS-System), created by the author, diminishs to a size of less than 10 nano particles in diameter and thus prevents major electrical drift of nano structured particulates in the upper troposphere and lower stratosphere and contributes largely in purifying the air and thus reduces the effects of climate shifts. (scirp.org)
Before I will elaborate on the thesis that nano particles are the main cause of climate shifts, we will discuss the contemporary consensus that we have global climate-change with an expectation that we will face at least 3 degrees Celsius overall warming caused by increases in the amount of carbon dioxide in the atmosphere and, show that in some respect, the reasoning about global change can be improved. (scirp.org)

Since large particles impact and sediment in the nares and the major airways, only relatively small particles enter the acini. (digitalfire.com)
Small particles have a small scattering angle, while large particles have a large scattering angle. (terasolartisans.com)

Twenty spinal metastases from renal origin (17 patients) treated by preoperative embolization with polyvinyl alcohol particles were analyzed retrospectively. (ajnr.org)
Preoperative embolization of spinal metastases of renal origin with polyvinyl alcohol particles is safe and might reduce intraoperative blood loss significantly. (ajnr.org)
The purpose of this retrospective study was to evaluate the effects of state-of-the-art selective embolization with polyvinyl alcohol (PVA) particles on intraoperative blood loss in vertebral metastases of renal cell carcinoma. (ajnr.org)
Selvol 205 is a low viscosity, easy to dissolve polyvinyl alcohol generally used as a stiffener or sizing agent for textile and paper. (chemicalstore.com)

Coutris, P., D. Leroy, E. Fontaine, and A. Schwarzenboeck, 2017: An Inverse Problem approach for the retrieval of ice particle mass from in-situ measurements. (ucar.edu)
This article illustrates how multifrequency radar observations can refine the mass-size parameterization of frozen hydrometeors in scattering models and improve the correlation between the radar observations and in situ measurements of microphysical properties of ice and snow. (ametsoc.org)
Starting from size and shape distributions of ice particles measured in situ, scattering models are used to simulate an ensemble of reflectivity factors for various assumed mass-size parameterizations (MSP) of the power-law type. (ametsoc.org)
CSA Ocean Sciences Inc. (CSA) has extensive experience using Laser In Situ Scanning and Transmissometry (LISST) instruments manufactured by Sequoia Scientific, including deep water LISST instruments designed for monitoring oil droplet size during accidental discharges for which subsea dispersants are a potential response tactic. (csaocean.com)

The particle size distribution can be calculated based on several models: most often as a number or volume/mass distribution. (horiba.com)
When presented as a volume distribution it becomes more obvious that the majority of the total particle mass or volume comes from the 3 μm particles. (horiba.com)
The simulation results show how similarly these two parameters modify gas mass flow rates, gas velocity fields, aspiration pressures in the melt delivery tube or the size of the recirculation zones below the melt nozzle. (unav.edu)
The data presented in this article were collected during the GPM Cold Season Precipitation Experiment (GCPEx) (2012) and Olympic Mountain Experiment (OLYMPEx) (2015) field campaigns, where the true mass-size relationship was not measured. (ametsoc.org)

There are several methods for measuring particle size and particle size distribution. (wikipedia.org)
Technology such as dynamic image analysis (DIA) can make particle size distribution analyses much easier. (wikipedia.org)
The notion of particle size distribution reflects this polydispersity. (wikipedia.org)
We investigated the in vitro influence of breathing patterns on lung dose (LD) and particle size distribution in an infant upper airway cast model in order to determine the optimal particle size for nebulized aerosol delivery to infants. (nih.gov)
Particles available as LD for all simulated breathing pattern showed a particle size distribution with a MMAD of 2.4 microm and a geometric standard deviation (GSD) of 1.56. (nih.gov)
Once the physical property is measured a calculation of some type generates a representation of a particle size distribution. (horiba.com)
Some techniques report only a central point and spread of the distribution, others provide greater detail across the upper and lower particle size detected. (horiba.com)
The easiest way to understand a number distribution is to consider measuring particles using a microscope. (horiba.com)
This approach builds a number distribution-each particle has equal weighting once the final distribution is calculated. (horiba.com)
Building a number distribution for these particles will generate the result shown in Figure 2, where each particle size accounts for one third of the total. (horiba.com)
If this same result were converted to a volume distribution, the result would appear as shown in Figure 2 where 75% of the total volume comes from the 3μm particles, and less than 3% comes from the 1μm particles. (horiba.com)
Instead, we decided to send samples of coffee ground by each machine to our friends at the Horiba Instruments particle science lab in Irvine, California, for particle size distribution analysis using laser diffraction equipment, because that appeared to represent the clearest, most objective route to evaluating the grind consistency of the four machines reviewed in this report. (coffeereview.com)
Particle size distribution analysis has application in a huge variety of fields, from pharmaceuticals to ceramics, construction to food & beverage, and yet no one had ever collaborated with them on a comparative analysis of particles generated by coffee grinding machines amid the quest for a better cup of coffee. (coffeereview.com)
Particle number size distribution (PNSD) of PM1 showed that the most numerous were particles in the size range of 20 to 300 nm. (bvsalud.org)
It has a moderately fine particle size distribution and the high plasticity and dry strength is due in part to unique mineralogy of the clay. (sheffield-pottery.com)
Using Mie theory, the data is used to calculate particle size distribution in a sample. (terasolartisans.com)
These are statistical parameters that can be read directly from the cumulative particle size distribution. (terasolartisans.com)
The LISST-Holo2 characterizes particles over the size range of 25 to 2500 μm, including particle size distribution, mean and median particle size , and a photograph-like view of particles in water . (csaocean.com)
The particles are tuned and received at a specific wavelength, and the energy is re-emitted within a particular spatial angular distribution as well as a relay. (mcctcarbide.com)

Dust particles trapped on cassette filters were analyzed by phase contrast and fluorescent light microscopy. (cdc.gov)
They are the fine dust and nano structured particles that cause the shifts of the climate in cells, as demonstrated in this article and results i.e. in more thunder and lightning, extreme weather, distinct droughts and precipitation patterns. (scirp.org)

Note the many hallmarks of smoke inhalation complexed with burn injury (ie, facial burns, carbonaceous particles in the nasal cavity, periorbital edema, hair singeing). (medscape.com)
To determine the clinical and economic consequences of inhaled corticosteroid doses and particle size in patients on triple-inhalation therapy for COPD. (dovepress.com)

D = 4 A π 2 {\displaystyle D={\sqrt[{2}]{\frac {4A}{\pi }}}} where D {\displaystyle D} : diameter of representative sphere A {\displaystyle A} : surface area of particle In some measures the size (a length dimension in the expression) can't be obtained, only calculated as a function of another dimensions and parameters. (wikipedia.org)

The Malvern Mastersizer 3000 is a laser diffraction particle size analyzer, suitable for measuring particle sizes 0.1 um - 3 mm. (terasolartisans.com)

This study accounts for the impacts of snow grain shape and mixing state of light-absorbing particles with snow on snow albedo in the E3SM land model. (copernicus.org)

Total particle number concentrations were determined with a condensation particle counter (CPC) for particles between 0.02 microm and 1 microm (P-Trak UPC, Model 8525, TSI) and the particle size fraction was determined with a differential mobility analyser (DMA) for particles from 0.01 microm to 0.5 microm. (who.int)
The median growth event rate was 5.2 nm/h, and the condensation sink during growth was 0.0011/s. (usp.br)

OBJECTIVES: Ultrafine particle emissions from waterpipes and their impact on human health have not been extensively studied. (who.int)
With regard to particle emissions, smoking waterpipes may carry similar health risks to smoking cigarettes. (who.int)

The short-term interdependencies were smaller during night hours (median MI = 0.01 ÷ 0.56) compared to business hours (MI = 0.23 ÷ 0.61). (bvsalud.org)
Smoke from the heated tobacco contributed to particles in the size range between 0.01 microm and 0.2 microm. (who.int)

This line of research can yield low-cost and real time particle size analysis. (wikipedia.org)
There is an international standard on presenting various characteristic particle sizes, the ISO 9276 (Representation of results of particle size analysis). (wikipedia.org)
Particle size analysis of the smoke emitted from air flow indicator tubes was conducted, and the concentration of hydrogen-chloride (7647010) produced by these tubes was measured. (cdc.gov)
Simply reveal the dynamic changes in spray particle size through its unique size history analysis software. (terasolartisans.com)
Why Malvern Panalytical for particle size analysis? (terasolartisans.com)
First, the basic concept of particle size analysis(1) particles: with a certain size and shape of small objects, is the basic unit of the composition of the powder. (mcctcarbide.com)

The KRUVE recommendations for specific brewing methods, meanwhile, present an impossible ideal for a grinder, veering substantially finer than the norm because the KRUVE system eliminates the very fine particles that other brew guides assume you're brewing with. (coffeereview.com)

5 µm, "fine"≤5 µm) from 37 volunteers within 5 days of seasonal influenza onset, measured viral copy number using quantitative RT-PCR, and tested the fine-particle fraction for culturable virus. (cdc.gov)

Beta particles are high-energy electrons that are emitted from the nuclei of unstable atoms (eg, cesium-137, iodine-131). (msdmanuals.com)
They collide with the nuclei of stable atoms, resulting in the emission of energetic protons, alpha and beta particles, and gamma radiation. (msdmanuals.com)

Figure 4 shows a population of beans where it may not be intuitively obvious, but there is an equal volume of each size, despite the wide range of numbers present. (horiba.com)
The test aerosol should include particles at or near the most penetrating particle size range. (cdc.gov)
The detection method should be able to measure particles in the most penetrating particle size range with high sensitivity and precision. (cdc.gov)
The instructions provided by grinder manufacturers could suggest a starting point for an optimal range of particle size, but they are simply too vague and are often specific to the performance of one machine. (coffeereview.com)
Note that we are not proposing that any of these particle size ranges is any more appropriate to any given brewing method than any other range. (coffeereview.com)
They provided wavy-lined graphs that gave form to the vast range of particle sizes. (coffeereview.com)
Median intraoperative blood loss in 19 embolized lesions was 1500 mL (range, 300-8000 mL), compared with 5000 mL (range, 1440-15000 mL) in the control group. (ajnr.org)
to use requires consideration of the expected size range, the sample type (liquid or solid), the amount of available sample, the chemical stability, and the application field. (anton-paar.com)
NaCl aerosol in the particle size range of 7 to 270 nm was used for tests. (bvsalud.org)
It was confirmed that the half masks of the FFP2 class are capable of filtering submicrometer aerosol in particle size range 7 to 270 nm with an efficiency exceeding 96% and can contribute to achieving compliance with the OEL for DE in the mining sector. (bvsalud.org)
This instrument was coupled with a laser particle spectrometer for particles between 0.35 microm and 10 microm (Wide Range Particle Spectrometer, Model 1000XP, MSC Corp). Carbon monoxide levels were determined with an electrochemical sensor (Q-Trak monitor, Model 8554, TSI). (who.int)
Recent technological developments have seen a wide range of industries look in more detail at particles in the 1-2 µm and nano range, and new evidence is emerging to suggest that assumptions about inhaled behaviour may not be correct. (ondrugdelivery.com)
The main reasons for its success are: Wide dynamic range - from submicron to the millimeter size range….Spraytec. (terasolartisans.com)
Disadvantages: slow, poor representative, can not measure ultra-fine particles.Sedimentation method (including gravity settlement and centrifugal settlement): Advantages: easy to operate, the instrument can run continuously, low price, accuracy and repeatability is better, the test range is larger. (mcctcarbide.com)

In case of jet milling, the particles in high velocity air pressure accelerate the small particle size, that is, the result of colliding the inner particles or impacting between the solid surfaces [ 18 ]. (hindawi.com)

When a particle becomes that small, the thickness of the interface layer becomes comparable with the particle size. (wikipedia.org)
The small particle size has the high surface-to-volume ratio, in food application, which indicates easy to access the enzymes and water. (hindawi.com)
69405.7 Particle Size or Fiber Dimension (a) The particle size or fiber dimension hazard trait is defined as the existence of a chemical substance in the form of small particles or fibers or the propensity to form into such small-sized particles or fibers with use or environmental release. (lawbc.com)
Carbon dioxide does not trigger the climate shifts, but is an indicator of exhaust of combustion processes that emit very small particles which drive these climate shifts. (scirp.org)

Lesions with larger particles might be visible on dental radiographs. (medscape.com)

The concentration of respirable size particles was higher in farrowing and nursery environments. (cdc.gov)

Which kind of laser is used in particle size experiment? (terasolartisans.com)
Laser diffraction is a widely used particle sizing technique for materials ranging from hundreds of nanometers up to several millimeters in size. (terasolartisans.com)

The median diameter of the particles in a full smoking set with charcoal, tobacco and water was 0.04 microm. (who.int)
The glowing piece of charcoal only contributed to particles smaller than 0.05 microm. (who.int)

Patients were grouped according to inhaled corticosteroid (ICS) dose (low/medium/high) and particle size device (extrafine/non-extrafine particles). (dovepress.com)
The causes underlying these shifts are nano structured particles in the upper troposphere and lower stratosphere, especially largely produced and remain in the temperate climate northern hemisphere cell and get dispersed by jet streams and low and high pressure areas. (scirp.org)
accumulation of several particles with high transverse mo- mentum (p) are typically referred to as jets and can be described reliably with the methods of perturbative QCD. (lu.se)

In all methods the size is an indirect measure, obtained by a model that transforms, in abstract way, the real particle shape into a simple and standardized shape, like a sphere (the most usual) or a cuboid (when minimum bounding box is used), where the size parameter (ex. (wikipedia.org)

Additionally, it is a relatively soft mineral with a Moh's hardness of 2.5-to-3.5, with one of the highest refractive indexes for a major industrial filler at 1.65 and a relatively low surface area when comparing other industrial minerals of comparable median particle size. (manufacturing-today.com)

Ursem, B. (2016) Climate Shifts and the Role of Nano Structured Particles in the Atmosphere. (scirp.org)

Are current in vitro and computer based particle behavioural models sufficient for describing this behaviour? (ondrugdelivery.com)

Filtration efficiencies of 98.5% (median) or higher were achieved. (bvsalud.org)

The notion of particle size applies to particles in colloids, in ecology, in granular material (whether airborne or not), and to particles that form a granular material (see also grain size). (wikipedia.org)

1 , 2 ) Whether the particle is "living" or "infectious" plays no role in how well it will be collected by a filter. (cdc.gov)

Definition of the particle size for an ensemble (collection) of particles presents another problem. (wikipedia.org)
Real systems are practically always polydisperse, which means that the particles in an ensemble have different sizes. (wikipedia.org)

Fine particles contained 8.8 (95% CI 4.1 to 19) fold more viral copies than did coarse particles. (cdc.gov)
Two subjects with the highest copy numbers gave culture positive fine particle samples. (cdc.gov)
KRUVE recommends you toss out the particles that are too large or too fine for optimal brewing. (coffeereview.com)
David Lewis reports the latest research on the changing view of the behaviour of particles in the extra-fine region and their potential for enhancing inhaled drug therapies. (ondrugdelivery.com)
How do extra-fine particles behave in the respiratory system? (ondrugdelivery.com)

For particles ≤0.1 µm, the definition can be extended into volume-equivalent diameter. (anton-paar.com)
Disadvantages: test time is longer.Resistance method: Advantages: easy to operate, the total number of particles can be measured, the equivalent concept clear, fast, good accuracy. (mcctcarbide.com)

There were a number of ways we could have approached the evaluation of the four grinders reviewed this month with regard to producing consistent particle size. (coffeereview.com)

Anatomy10

Organisms9

Diseases3

Chemicals and Drugs112

Analytical, Diagnostic and Therapeutic Techniques and Equipment66

Phenomena and Processes42

Disciplines and Occupations9

Technology, Industry, Agriculture40

Information Science3

Health Care21

Aerodynamic8

Microns8

Refractive index of the particles3

Diameter of particles1

Average particle size2

Aerosols8

Aerosol particles10

Particulate4

Known as the median1

Micron5

Ultrafine particles3

Distributions were characterized1

Diameters2

Droplets3

Measurement3

Image Velocimetry2

Sieve analysis2

Density2

Spherical particles4

Measure the particle2

Negatively charged2

Characteristics1

Pulmonary2

Lethal dose2

Nano particles3

Large particles2

Polyvinyl alcohol4

Situ4

Mass4

Distribution19

Dust2

Inhalation2

Parameters1

Analyzer1

Albedo1

Condensation2

Emissions2

0.012

Analysis6

Finer1

Fraction1

Atoms2

Range14

Velocity1

Small4

Lesions1

Concentration1

Laser2

Microm2

High3

Methods1

Comparable1

20161

Vitro1

Filtration1

Grain size1

Infectious1

Ensemble2

Fine5

Equivalent2

Regard1