combustibility
31Mulch — In agriculture and gardening, mulch is a protective cover placed over the soil to retain moisture, reduce erosion, provide nutrients, and suppress weed growth and seed germination. Mulching in gardens and landscaping mimics the leaf cover that is …
32Ionic liquid — An ionic liquid is a liquid that contains essentially only ions. Some ionic liquids, such as ethylammonium nitrate are in a dynamic equilibrium where at any time more than 99.99% of the liquid is made up of ionic rather than molecular species. In …
33Glossary of wildland fire terms — The following is a glossary of wildland fire terms. Except where noted, terms are taken from a 1998 Fireline Handbook transcribed for a Conflict 21 counter terrorism studies website by the Air National Guard. [… …
34Diamond enhancement — Diamond enhancements are specific treatments, performed on natural diamonds (usually those already cut and polished into gems), which are designed to improve the gemological characteristics and therefore the value of the stone in one or more ways …
35Fire door — A fire door is a type of door, or barrier used as a passive fire protection item within buildings to prevent the spread of fire or smoke which may consist of dangerous chemicals. It is usually the only means of allowing people to pass through a… …
36Timeline of Islamic science and engineering — This timeline of Islamic science and engineering covers the general development of science and technology in the Islamic world during the Islamic Golden Age, usually dated from the 7th to 16th centuries.From the 17th century onwards, the advances …
37Fireproofing — Fireproof redirects here. For the album, see Fireproof (album). For the 2008 film, see Fireproof (2008 film). Fireproofing, a passive fire protection measure, refers to the act of making materials or structures more resistant to fire, or to those …
38Idrialite — Idrialite, or Idrialine, is a soft, orthorhombic hydrocarbon mineral, chemical formula: 4 [C22 H14] . It is usually greenish yellow to light brown in colour with bluish fluorescence. It can be found mixed with clay, pyrite and gypsum associated… …
39Alchemy in history — Alchemy encompasses several philosophical traditions spanning some four millennia and three continents. These traditions general penchant for cryptic and symbolic language makes it hard to trace their mutual influences and genetic… …
40Ramsbottom Carbon Residue — Ramsbottom Carbon Residue, which abbreviation is RCR, is well known in the petroleum industry as a method to calculate the carbon residue of a fuel. The carbon residue value is considered by some to give an approximate indication of the… …
