Search results
Results from the WOW.Com Content Network
For example, metal microparticles can be explosive in air. Microspheres are spherical microparticles, [ 4 ] and are used where consistent and predictable particle surface area is important. In biological systems, a microparticle is synonymous with a microvesicle , a type of extracellular vesicle (EV).
Nanoparticles are distinguished from microparticles (1-1000 μm), "fine particles" (sized between 100 and 2500 nm), and "coarse particles" (ranging from 2500 to 10,000 nm), because their smaller size drives very different physical or chemical properties, like colloidal properties and ultrafast optical effects [3] or electric properties.
The terms nanoparticles and ultrafine particles (UFP) are often used synonymously although UFP can reach into the micrometre range. The term nanostructure is often used when referring to magnetic technology. Nanoscale structure in biology is often called ultrastructure.
An artificial cell, synthetic cell or minimal cell is an engineered particle that mimics one or many functions of a biological cell.Often, artificial cells are biological or polymeric membranes which enclose biologically active materials. [1]
Particulates or atmospheric particulate matter (see below for other names) are microscopic particles of solid or liquid matter suspended in the air.The term aerosol refers to the particulate/air mixture, as opposed to the particulate matter alone, [1] though it is sometimes defined as a subset of aerosol terminology. [2]
Dust is made of fine particles of solid matter. [1] On Earth, it generally consists of particles in the atmosphere that come from various sources such as soil lifted by wind (an aeolian process), volcanic eruptions, and pollution. Dust in homes is composed of about 20–50% dead skin cells. [2]
Diagram of simple filtration: oversize particles in the feed cannot pass through the lattice structure of the filter, while fluid and small particles pass through, becoming filtrate. Filtration is a physical separation process that separates solid matter and fluid from a mixture using a filter medium that has a complex structure through which ...
Particle size is a notion introduced for comparing dimensions of solid particles (), liquid particles (), or gaseous particles ().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).