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SBA-15, an acronym for Santa Barbara Amorphous-15, is a silica-based ordered mesoporous material that was first synthesized by researchers at the university of California Santa Barbra in 1998. [1] This material proved important for scientists in various fields such as material sciences, [ 2 ] drug delivery, [ 3 ] catalysis, [ 4 ] fuel cells [ 5 ...
Soil contamination, soil pollution, or land pollution as a part of land degradation is caused by the presence of xenobiotic (human-made) chemicals or other alteration in the natural soil environment. It is typically caused by industrial activity, agricultural chemicals or improper disposal of waste .
The most common types of mesoporous nanoparticles are MCM-41 and SBA-15. [2] Research continues on the particles, which have applications in catalysis, drug delivery and imaging. [3] Mesoporous ordered silica films have been also obtained with different pore topologies. [4] A compound producing mesoporous silica was patented around 1970.
A common approach to standards-based assessment (SBA) is: Identify a key fact or important body of knowledge (e.g. a scientific theory, a mathematical relationship), the essential content and concepts. Example from the British Columbia Grade 3 Curriculum Package (September 2010):
The international pictogram for environmental hazards.. Environmental hazards are hazards that affect biomes or ecosystems. [1] Well known examples include oil spills, water pollution, slash and burn deforestation, air pollution, ground fissures, [2] and build-up of atmospheric carbon dioxide. [3]
Multiple regression equations are used to describe the relationship between sample locations and environmental variables, often relying on geographic information systems (GIS) to collect measurements. This results in an equation that can predict pollution concentrations at unmeasured locations based on data for the predictor variables in ...
Space pollution — Space debris • Interplanetary contamination Resource depletion — Exploitation of natural resources • Overdrafting (groundwater) • Overexploitation Consumerism — Consumer capitalism • Planned obsolescence • Over-consumption
Runoff of soil and fertilizer on a farm field during a rain storm. Nonpoint source (NPS) water pollution regulations are environmental regulations that restrict or limit water pollution from diffuse or nonpoint effluent sources such as polluted runoff from agricultural areas in a river catchments or wind-borne debris blowing out to sea.