porous metal filter
61Selective catalytic reduction — (SCR) is a means of converting nitrogen oxides, also referred to as chem|NO|x with the aid of a catalyst into diatomic nitrogen, chem|N|2, and water, chem|H|2|O. A gaseous reductant, typically anhydrous ammonia, aqueous ammonia or urea, is added… …
62Multijunction photovoltaic cell — Multi junction solar cells or tandem cells are solar cells containing several p n junctions. Each junction is tuned to a different wavelength of light, reducing one of the largest inherent sources of losses, and thereby increasing efficiency.… …
63coffee — /kaw fee, kof ee/, n. 1. a beverage consisting of a decoction or infusion of the roasted ground or crushed seeds (coffee beans) of the two seeded fruit (coffee berry) of certain coffee trees. 2. the seeds or fruit themselves. 3. any tropical tree …
64Joseph Lister, 1st Baron Lister — Infobox Scientist name = Joseph Lister birth date = birth date|1827|4|5|df=y birth place = Upton, Essex death date = death date and age|1912|2|10|1827|4|5|df=y death place = Walmer, Kent nationality = United Kingdom field = Medicine work… …
65Hysteresis — Not to be confused with Hysteria. Fig. 1. Electric displacement field D of a ferroelectric material as the electric field E is first decreased, then increased. The curves form a hysteresis loop. Hysteresis is the dependence of a system not… …
66Ground-coupled heat exchanger — Earth cooling tubes or earth warming tubes (also known as ground coupled heat exchangers) utilize the earth s near constant subterranean temperature to warm or cool air for residential, agricultural or industrial uses. They are often a viable and …
67Carbon nanotubes in photovoltaics — Organic photovoltaic devices (OPVs) are fabricated from thin films of organic semiconductors, such as polymers and small molecule compounds, and are typically on the order of 100 nm thick. Because polymer based OPVs can be made using a coating… …
68light — light1 lightful, adj. lightfully, adv. /luyt/, n., adj., lighter, lightest, v., lighted or lit, lighting. n. 1. something that makes things visible or affords illumination: All colors depend on light. 2. Physics …
