scispace - formally typeset
Search or ask a question

What is the size range of dust particles? 

Answers from top 15 papers

More filters
Papers (15)Insight
The properties of the dust particles found by MIDAS represent an extension of the dust results of Rosetta to the micro- and nanometer scale.
Special attention must be paid to the link with soil properties and its implications on the size distribution of the emitted dust.
We found that dust particle size, chemistry, and morphology appear to be fairly static from individual sources, confirming preliminary hypotheses based on large-scale observations of Saharan dust.
The preferable approach is to analyze toxicological and epidemiological studies that incorporate sufficient particle size information to obtain particle size-selective dust limits directly.
It appears that a significant fraction of the cosmic dust consists of small (<5 µg) and slow (<15 km s−1) particles.
The results show that, the particle size distribution of the dust uncollected by the GBF is relatively concentrated.
Results indicate that the number concentration of ultrafine particles can reach up to 1.2×105 cm−3 during weak dust storm.
Sample data are presented which show that particle size classification is very important when analysing dust samples for atmospheric metal pollution studies.
Thus, it is important to know the specific particle size fractions of wood dust.
The results show that at macro-scale, the localized dust concentration is proportional to the density of dust particles' trace lines.
It is obvious that our ability to model the single-scattering properties of dust particles accurately depends on the size parameter.
This data illustrates the significance of particle size for preventing coal dust explosions and the importance of measuring particle size as well as TIC (which includes moisture as well as incombustibles) to determine the true explosibility of a dust sample.
This is the first scientific study of particle size distributions in an Australian dust storm.
The size distribution and composition of the dust grains has quantitative but not qualitative effects on our results.
The results showed that, under different dust conditions, the instantaneous number concentrations of dust particles differed widely.

Related Questions

What is particle size?5 answersParticle size refers to the measure of subdivision of a solid material into particles. It is an important physical property that impacts the quality and performance of various products and processes. Particle size distribution, which refers to the range of particle sizes present in a sample, is routinely measured in industries and is critical for manufacturing businesses. In the pharmaceutical industry, particle size analysis is integral for formulating and manufacturing dosage forms, as it affects dissolution, absorption rates, and content uniformity. Particle size can be defined in terms of linear geometric dimensions or equivalent geometric sizes based on particle volume, surface area, or equivalent sizes for a sphere exhibiting equivalent physical behaviors. The physical nature of particles and their interactions with the surroundings differ for smaller particles, requiring a different treatment.
What are the typical particle sizes of Fly ash?5 answersFly ash particle sizes vary depending on the source and processing methods. The particle size distribution of fly ash can range from 0.5 to 300 μm. Specific particle size ranges have been observed in different studies. For example, one study found that up to 75% of fly ash particles were concentrated in the range of 38.5–75 μm. Another study mentioned that fly ash fractions below 125 µm were effective fillers for rubber mixes. In terms of geopolymer paste formulation, fly ash particle sizes of 45-μm (325 mesh) were found to enhance heat flow and compressive strength. It is important to note that the particle size distribution of fly ash does not necessarily correlate with its chemical composition.
What is the range of sizes of microplastics?4 answersMicroplastics are defined as microscopic plastic particles in the range from few micrometers and up to 5 mm. Microplastics are plastic particles with diameters <5mm. Studies on impacts of emerging contaminants are challenging, as is the case for studying the smallest sizes (<100 µm) of microplastics. Most studies on microplastics focused on gut, liver, and brain, and MPs toxicity was size-dependent.
What is the size of cigarette smoke particles?7 answers
What is the size of smoke particles?7 answers
What is the size range of reciprocal suspended particulate matter?8 answers

See what other people are reading

What factors affect the optimal ratio of shoe polish for achieving a durable and effective shine?
4 answers
The optimal ratio of shoe polish for achieving a durable and effective shine is influenced by various factors outlined in the provided research contexts. Factors include the composition of raw materials such as sodium nitrite, ammonium carbonate, and sodium benzoate, stearic acid, magnesium stearate, and polyethylene wax, as well as core shell structure particles with specific copolymers. Additionally, the inclusion of chlorinated paraffin, stearic acid, and dimethyl silicone oil impacts the durability and effectiveness of the shoe polish. Moreover, the presence of specific components like acid, ester, paraffin, and a surface active agent in the shoe polish mixture contributes to its polishing and cleaning actions. By considering these factors in the formulation, a shoe polish can be developed with the desired attributes of durability and shine.
How does ICP-MS technology determine the concentration of titanium dioxide nanoparticles in plants?
5 answers
ICP-MS technology determines the concentration of titanium dioxide nanoparticles (TiO2 NPs) in plants by utilizing various methods. Studies have shown that the use of single particle ICP-MS is crucial for analyzing engineered nanomaterials (ENMs) in biological samples, including plants. Additionally, the application of single-cell ICP-MS has been optimized for assessing TiO2 NP associations in cell lines derived from aquaculture species, providing insights into the interactions of TiO2 NPs with cell membranes. Furthermore, research on foliarly applied TiO2 NPs in tomato plants demonstrated an increase in tissue Ti concentration, affecting biomass production and the antioxidant system. Moreover, the use of triple quadrupole ICP-MS in tandem mass spectrometry has been proposed to study the uptake and translocation of TiO2 NPs in model plants, offering enhanced sensitivity and detection limits for these nanoparticles.
Do dust rgbs work over ocean?
5 answers
Dust RGBs, particularly those derived from satellite ocean color sensors like SeaWiFS, are effective tools for detecting mineral dust aerosols over the ocean. These RGBs play a crucial role in monitoring aerosol radiance and optical thickness, aiding in the identification of dust plumes originating from regions like North Africa. The utilization of advanced processing capabilities, such as automated near real-time processing, enhances the accuracy and efficiency of dust enhancement techniques over the ocean. Additionally, the retrieval of aerosol optical thickness over the ocean using geostationary satellites like GOCI demonstrates promising results for daily monitoring of atmospheric aerosol loading, benefiting environmental supervisory authorities. Therefore, dust RGBs are valuable in tracking dust aerosols over the ocean and assessing their impact on marine ecosystems and radiative balance.
Which is more effective for hair loss: Finasteride or Dutasteride?
5 answers
Dutasteride appears to be more effective for treating hair loss compared to finasteride. Studies suggest that dutasteride shows greater improvement in hair growth, especially when used at recommended dosages, and it may lead to better outcomes in terms of hair regrowth and stabilization of hair loss. Dutasteride inhibits both type I and type II 5α-reductase enzymes, resulting in more significant suppression of dihydrotestosterone (DHT) levels in the serum and scalp compared to finasteride. Additionally, dutasteride has been found to be effective in treating frontal fibrosing alopecia (FFA) with a dose-dependent response, making it a preferred option over finasteride and other systemic therapies. Therefore, based on the available evidence, dutasteride emerges as a more effective treatment for hair loss when compared to finasteride.
What types of thunderstorm that affect dubai?
4 answers
Dubai can be affected by different types of thunderstorms, including those triggered by specific meteorological conditions and aerosol interactions. Thunderstorms in the region can be influenced by factors like the Arabian Heat Low (AHL), sea-breeze circulations, and aerosol concentrations. These thunderstorms can lead to reduced visibility due to dust storms, especially during winter conditions, impacting areas like Abu Dhabi and other central Emirates. Additionally, rare summertime rainfall events in the United Arab Emirates (UAE) can be associated with the intensification of the Arabian heat low, leading to convective activity over the region. Therefore, Dubai can experience thunderstorms linked to various local and regional meteorological phenomena and aerosol interactions.
What is current research and gap of pickering emulsion from insect protein?
5 answers
Current research on Pickering emulsions from insect protein focuses on their potential applications in various fields, including food, cosmetics, and pharmaceuticals. Studies highlight the stability and promising properties of Pickering emulsions stabilized by protein-based particles, emphasizing their use as delivery vehicles, templates for porous materials, and in biodegradable packaging films. However, gaps exist in the understanding of the release mechanisms of bioactives from these emulsions, their compatibility with real food systems, and their efficacy and safety in vivo. Future research directions include developing protein-based antioxidant Pickering emulsions, expanding their applications, and bridging the gap between laboratory development and market implementation. Further exploration is needed to elucidate these aspects and enhance the utilization of insect protein in Pickering emulsion technology.
What is die sinking electric machining with copper and graphite materials?
5 answers
Die-sinking electric discharge machining (EDM) involves the use of copper and graphite materials for precise machining operations. Copper electrodes are utilized in EDM to produce micro-parts with high accuracy and quality, as demonstrated in the study by Mouralova et al.. On the other hand, graphite electrodes are employed in die-sinking EDM to predict and prevent surface defects like cracks, ensuring excellent surface quality on machined parts, as highlighted in the research by Mouralova et al.. The choice of electrode material, along with machine parameter settings, significantly influences the erosion rate, corner radius, and overall machining outcomes in EDM processes, as discussed in various studies. These findings underscore the importance of material selection and process optimization in die-sinking electric machining for achieving desired surface quality and dimensional accuracy.
How to calculate fineness modulus from particle size analysis?
5 answers
To calculate the fineness modulus from particle size analysis, one can utilize various methods such as the modulus of uniformity and modulus of fineness. The fineness modulus is a measure of the average particle size in a grading system, providing insights into the particle distribution. Techniques like sieve analysis can be employed to determine the particle size distribution by segregating a sample onto sieves with different apertures. Additionally, density measurement means, radiation sources, and detectors can be used to measure the density of suspensions containing solids of varying sizes, aiding in determining the fineness of solids in a suspension. These methods collectively contribute to accurately calculating the fineness modulus from particle size analysis.
What is PFAS retardation mechanism?
9 answers
Per- and polyfluoroalkyl substances (PFAS) are persistent environmental pollutants with widespread applications and significant health concerns. Various mechanisms have been explored to understand and mitigate the mobility and persistence of PFAS in the environment, which can be broadly categorized into chemical degradation, physical retardation, and biological interactions. Chemical degradation mechanisms, particularly advanced reduction processes (ARPs), have shown promise in breaking down PFAS by generating highly reductive hydrated electrons, which can effectively destruct PFAS molecules in water. Similarly, the conversion of perfluorinated acids into perfluoroalkenes using aluminum trifluoride presents a chemical pathway for PFAS degradation, even at room temperature, by facilitating the loss of CO2 or SO3 from the PFAS structure. Physical retardation mechanisms include the development of PFAS diffusion preventing systems, such as multilayer polyolefin-based articles with ethylene-vinyl alcohol resin layers, designed to block the migration of PFAS. Additionally, the adsorption of PFAS onto microplastics in aquatic systems demonstrates the physical interaction and potential for PFAS to be immobilized through adsorption processes, influenced by factors like pH, ionic strength, and temperature. Biological interactions are highlighted by the disruption of cellular membranes by PFAS, which depends on the lipid composition of the membranes. PFAS can fluidize phospholipid monolayers, affecting the physicomechanical properties of bacterial membranes, which suggests a biological mechanism of PFAS interaction that could potentially be leveraged for bioremediation or bioattenuation strategies. In situ remediation efforts, such as the use of colloidal activated carbon (CAC) injected at the air-water interface within PFAS source zones, have shown effectiveness in attenuating PFAS concentrations in groundwater, demonstrating a combined physical and chemical approach to PFAS retardation. Overall, PFAS retardation mechanisms encompass a multifaceted approach involving chemical degradation, physical adsorption, and biological interactions, each contributing to the reduction of PFAS mobility and persistence in the environment.
Is there a correlation between La Nina weather events and production of wheat in Australia?
4 answers
Yes, there is a correlation between La Niña events and wheat production in Australia. La Niña strongly influences rainfall and temperature patterns in Eastern Australia, impacting wheat phenology and productivity due to frost, heat, and drought stresses. La Niña climate effects in the region, combined with early and sustained rainfall, are contributing to a potentially record-breaking mosquito season in Australia. La Niña events have been shown to have a negative impact on wheat yield anomalies, exports, and stock-to-use ratios globally, with a stronger effect during La Niña compared to El Niño. Therefore, La Niña events can significantly affect wheat production in Australia and worldwide, highlighting the importance of understanding and adapting to these climate phenomena for agricultural sustainability.
How to reduce fluctuations of the suspension height overtime during sedimentation?
5 answers
To reduce fluctuations in suspension height during sedimentation over time, various factors need consideration. Stratification alone cannot govern local velocity fluctuations in sedimenting spheres. Inertial screening at Reynolds numbers above a critical value significantly reduces both the magnitude and spatial extent of particle velocity fluctuations. A nonlinear two-fluid stochastic hydrodynamical description highlights a strong reduction in velocity fluctuation dependence on system size, aiding in resolving long-standing puzzles in the field. The width of the front in a suspension grows linearly due to polydispersity or density fluctuations, contributing to overall fluctuations. Improving settling height methods by characterizing suspension stability through solid loading variations can help mitigate fluctuations and provide more accurate data for stabilization assessment. Integrating these insights can lead to a more stable sedimentation process with reduced fluctuations in suspension height.