High-Density Polyethylene: A material used to make plastic bottles and other products that produces toxic fumes when burned.
Density: The weight of a certain amount of water. It is usually expressed in kilograms per cubic metre.
Dental fluorosis: Disorder caused by excessive absorption of fluorine and characterized by brown staining of teeth.
Density Dependence
regulation of the size of a population by mechanisms that are themselves controlled by the size of that population (e.g. the availability of resources) and whose effectiveness increases as population size increases.
Density: A measure of how heavy a specific volume of a solid, liquid, or gas is in comparison to water. depending on the chemical.
Density Bonus - A credit that allows developers to build more units than would normally be allowed in a certain zoning district by exchanging the excess units for other community benefits, such as affordable housing, historic preservation, ...
density : A measure of how heavy a solid, liquid, or gas is for its size. Density is expressed in terms of weight per unit volume, that is, grams per cubic centimeter or pounds per cubic foot. The density of water is 1.
density (DEN-sit-tee). A measure of how heavy a substance
(solid, liquid or gas) is for its size. Density is expressed in
terms of weight per unit volume, that is, grams per cubic ...
Density
A measure of how heavy a solid, liquid, or gas is for its size. Mathematically, it is the ratio of mass to volume of a material, usually in grams per cubic centimeter or pounds per gallon.
Dermal Exposure ...
Low density polyethylene (LDPE)
A member of the polyolefin family of plastics. It is a flexible material and usually used as film for packaging or as bags
M ...
LOW DENSITY POLYETHYLENE (LDPE) Often referred as No.4 Plastic.
LOW GRADE PAPER (LG) Less valuable types of paper such as mixed office paper, corrugated cardboard and newspaper.
MA Magnesium.
bulk density; soil
The mass of dry soil per unit bulk volume. The bulk volume is determined before the soil is dried to constant weight at 105° C. It has been called apparent density.
bulk specific gravity ...
bulk density The mass of dry matter including air space per unit volume of material.
bulking A condition found in the activated sludge treatment process when the flocculated biomass becomes buoyant and does not settle properly in a clarifier.
Bulk Density
The weight of a material per unit of volume compared to the weight of the same volume of water.
Byproduct ...
Vapor Density: The vapor density is expressed in grams per liter (g / L) and is comparedto the density of air (air=1).
H high-density polyethylene
Definition (english only)
A kind of plastic used in the manufacturing of bottles and other products. It produces toxic fumes when burned and is often recycled.
Density: The amount of mass per unit volume.
Desorption: Process of removing a sorbed substance by reversing adsorption or absorption.
Detection Limit: The lowest concentration of a chemical which can be reliably reported to be different from zero.
Low density forestry material consisting of tops of trees and small branches. Also referred to as 'lop and top'.
CAP ...
Low Density Polyethylene (LOPE)- Plastic material used for both rigid containers and plastic film applications.
High Density Polyethylene
HDT
Highest Dose Tested in a study. Heavy-Duty Truck ...
Cities and Density
Mass Transit
Site Specifics
The Skyscraper Museum ©1997-2004 Carol Willis: Founder, Director, Curator
Last updated: 15-Mar-2006
Comments and Questions ...
LDPE- Low-density polyethylene. Commonly used in shrink-wrap, newspaper bags, and grocery bags.
Litter- Waste that is improperly disposed of on the street, sidewalk, lakes and other bodies of water, and in the general environment.
carbon density The amount of carbon per unit area for a given ecosystem or vegetation type, based on climatic conditions, topography, vegetative-cover type and amount, soils, and maturity of the vegetative stands.
Host density dependence Applied to the aggregation of risk to hosts from parasitoid attacks: hosts in either higher or lower host density patches tend to be at a greater risk of attack (direct and inverse host density dependence, respectively).
High strength to density ratios, excellent thermal and electrical insulation properties, and good resistance to acids, alkalies, and solvents characterize plastics. But the major problem caused by plastics is their inability to degrade.
chemocline a density gradient, or pycnocline, owed to changing salt concentrations
chemolithotrophy autotrophy in which inorganic chemical bonds are the source of energy and inorganic substances serve as electron donors; chemosynthesis ...
As water temperature decreases, its density increases. Denser water moves to the bottom of a water body under the force of gravity. As water temperature declines to 0º C, water becomes solid ice. Because ice is less dense and about 8.
Their primary goal is to improve growth and quality by decreasing the density of the stand. The distinction between thinning and improvement cutting often is blurry. This is especially the case in mixed stands.
The rank order of streams within a drainage basin has a log-normal probability density function.
With incident cases, unbiased subject selection, and density sampling of controls, ad/bc is an estimate of the ratio of the person-time incidence rates (force of morbidity) in the exposed and unexposed. No rarity assumption is required for this.
And compact development is not new, higher density housing is a long-standing tradition, whether it is mid-rise, multi-family, or single family on small lots.
An example, in the atmosphere occurs when warm air with a lower density experiences an upward force until it cools and its density matches the surrounding air, generally termed convection cells.
Number 2 is reserved for high-density polyethylene plastics. These include heavier containers that hold laundry detergents and bleaches as well as milk, shampoo and motor oil.
All plastics marked 1 to 7 are theoretically recyclable though in practice many are not: 1 - polyethylene terephalate (PET); 2 - high density polyethylene (HDPE); 3 - unplasticised polyvinyl chloride (UPVC) or plasticised polyvinyl chloride (PPVC); ...
Heavy Metals: those metals (elements with high density, malleability, and electrical and thermal conductivity) that have high specific gravity and high atomic mass, such as lead, cadmium, zinc, copper, silver, and mercury.
How is it used?
By studying the width, density, and chemical makeup of each layer, scientists can tell what the water temperature and other conditions were like in the past.
It has a density approximately 11 times greater than that of water and is easily formed into sheets and interlocking bricks.
Population density refers to the concentration of those organisms in any given area. The science of measuring population densities and dynamics was derived from studies of insects, especially pests. It has since been extended to human populations.
Irradiance, E: Power incident upon a surface, measured in W.cm-2. Synonym: power density.
Isolation Waste: Discarded waste material contaminated with excretions, exudates and secretions from human beings with highly communicable diseases.
A high viscosity will resist movement, and a low viscosity will flow quickly. This is not necessarily the same as density. Viscosity is normally measured comparatively by the time a given volume of liquid will pass through a pipe of fixed diameter.
Equivalent Opacity - the application of the Ringelmann system to the evaluation of the density of other than black smoke (see Ringelmann) ...
Pressure, Velocity: In flowing air, the pressure due to the velocity and density of the air.
Algae blooms: The rapid growth of algae on the surface of lakes, streams, or ponds; stimulated by nutrient enrichment; an explosive increase in the density of phytoplankton within an area.
Fine liquid or solid particles such as dust, smoke, mist, fumes, or smog found in air or emissions. 4, Very small solids suspended in water. They vary in size, shape, density, and electrical charge, ...
The movement of the groundwater is influenced by such factors as local groundwater flow patterns, the character of the aquifer in which the groundwater is contained, and the density of contaminants. A plume may also be a cloud of smoke or vapor.
Thus, compounds which act as endocrine modulators can have far-reaching consequences if they obstruct crucial bodily functions such as child-bearing, body temperature regulation, bone density, and organ function.
 See also: Water, Environment, Condition, Table, Site
  
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