A returning ascent or ascension; acclivity.
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In topography, prominence measures the height of a mountain or hill's summit relative to the lowest contour line encircling it but containing no higher summit within it. It is a measure of the independence of a summit. A peak's key col (highest gap between two mountains) is a unique point on this contour line and the parent peak is some higher mountain, selected according to various criteria.
American Civil War
The American Civil War (also known by other names) was a civil war in the United States from 1861 to 1865, fought between the northern United States (loyal to the Union) and the southern United States (that had seceded from the Union and formed the Confederacy). The civil war began primarily as a result of the long-standing controversy over the enslavement of black people. War broke out in April 1861 when secessionist forces attacked Fort Sumter in South Carolina shortly after Abraham Lincoln had been inaugurated as the President of the United States. The loyalists of the Union in the North, which also included some geographically western and southern states, proclaimed support for the Constitution. They faced secessionists of the Confederate States in the South, who advocated for states'
A reagent is a substance or compound added to a system to cause a chemical reaction, or added
Recent African origin of modern humans
In paleoanthropology, the recent African origin of modern humans, also called the "Out of Africa
Tollens' reagent is a chemical reagent used to determine the presence of aldehyde and aromatic
The Folin–Ciocalteu reagent (FCR) or Folin's phenol reagent or Folin–Denis reagent, also called
Organolithium reagents are organometallic compounds that contain carbon – lithium bonds. They are important reagents in organic synthesis, and are frequently used to transfer the organic group or the lithium atom to the substrates in synthetic steps, through nucleophilic addition or simple deprotonation. Organolithium reagents are used in industry as an initiator for anionic polymerization, which leads to the production of various elastomers. They have also been applied in asymmetric synthesis in the pharmaceutical industry. Due to the large difference in electronegativity between the carbon atom and the lithium atom, the C-Li bond is highly ionic. Owing to the polar nature of the C-Li bond, organolithium reagents are good nucleophiles and strong bases. For laboratory organic synthesis, ma
Most recent common ancestor
In biology and genealogy, the most recent common ancestor (MRCA), last common ancestor (LCA
Schwartz's reagent is the common name for the organozirconium compound with the formula (C5H5
Woollins' reagent is an organic compound containing phosphorus and selenium. Analogous