catalyst gas factor
51digestive system, human — Introduction the system used in the human body for the process of digestion. The human digestive system consists primarily of the digestive tract (alimentary canal), or the series of structures and organs through which food and liquids pass… …
52Nickel — This article is about the chemical element. For other uses, see Nickel (disambiguation). cobalt ← nickel → copper ↑ Ni ↓ Pd …
53Zinc — This article is about the metallic element. For other uses, see Zinc (disambiguation). copper ← zinc → gallium ↑ Zn ↓ Cd …
54Inventions in the modern Islamic world — [ Abdus Salam, the 1979 Nobel Prize in Physics recipient, include the electroweak interaction, electroweak symmetry breaking, magnetic photon, neutral current, preon, W and Z bosons, supergeometry, supermanifold, superspace and superfield.] This… …
55Europe, history of — Introduction history of European peoples and cultures from prehistoric times to the present. Europe is a more ambiguous term than most geographic expressions. Its etymology is doubtful, as is the physical extent of the area it designates.… …
56Biochar — is a charcoal produced from biomass that can store carbon. It is of increasing interest because of concerns about global warming caused by emissions of CO2 and other greenhouse gases. In some cases, the term is used specifically to mean biomass… …
57Algae fuel — might be an alternative to fossil fuel and uses algae as its source of natural deposits. Several companies and government agencies are funding efforts to reduce capital and operating costs and make algae fuel production commercially viable.[1]… …
58Methamphetamine — Meth and Tik redirect here. For other uses, see Meth (disambiguation) and Tik (disambiguation). This article is about the psychostimulant drug, methamphetamine, in both racemic and dextrorotatory forms. For the CNS inactive OTC nasal decongestant …
59Wikipedia:Featured article candidates — Here, we determine which articles are to be featured articles (FAs). FAs exemplify Wikipedia s very best work and satisfy the FA criteria. All editors are welcome to review nominations; please see the review FAQ. Before nominating an article,… …
60Nitrogen — carbon ← nitrogen → oxygen ↑ N ↓ P …
