The effects of both the transatlantic slave trade and colonialism continue to reverberate today, leading activists, human rights groups and the descendants of victims to demand reparations. The debate over reparations for slavery in the United States dates back generations, in fact, all the way to the Civil War.
No one wants to wait around for nail polish to dry. There are lots of rumors of ways to get polish to dry more quickly, but which actually work? These are the best quick-drying nail polish tips submitted by readers. Feeling scientific? Take a look at the chemistry behind quick-dry methods and learn which really work.
Our blood is composed of blood cells and an aqueous fluid known as plasma. Human blood type is determined by the presence or absence of certain identifiers on the surface of red blood cells. These identifiers, also called antigens, help the body's immune system to recognize its own red blood cell type.
Asters are radial microtubule arrays found in animal cells. These star-shaped structures form around each pair of centrioles during mitosis. Asters help to manipulate chromosomes during cell division to ensure that each daughter cell has the appropriate complement of chromosomes. They consist of astral microtubules that are generated from cylindrical microtubules called centrioles.
Potassium Atomic Number: 19 Potassium Symbol: K on the Periodic Table Potassium Atomic Weight: 39.0983 Discovery: Sir Humphrey Davy 1807 (England) Electron Configuration: [Ar]4s 1 Potassium Word Origin: English potash pot ashes; Latin kalium , Arabic qali : alkali. Isotopes: There are 17 isotopes of potassium.
Polyvinyl chloride or PVC was first created by the German chemist Eugen Baumann in 1872. Eugen Baumann never applied for a patent. Polyvinyl chloride or PVC was never patented until 1913 when German, Friedrich Klatte invented a new method of the polymerization of vinyl chloride using sunlight. Friedrich Klatte became the first inventor to receive a patent for PVC.