Further, African Americans did not have the freedom to choose where and how to live due to the effects of state-sponsored restrictive covenantsâlegally binding contracts making it illegal to rent, sell, or lease housing to black people (in some regions it included other nonwhites).
Nonarteritic anterior ischemic optic neuropathy (NAION) is the most common clinical presentation of acute ischemic damage to the optic nerve.Most treatments proposed for NAION are empirical and include a wide range of agents presumed to act on thrombosis, on the blood vessels, or on the disk edema itself.onarteritic anterior ischemic optic neuropathy (NAION) is the most common clinical presentation of acute ischemic damage to the optic nerve.
Advertisements: When an atom gains one or more electrons, a negatively charged ion is formed. Positively charged ion is called cation, and the negatively charged ion is called anion. Thus, A cation (positively charged ion) is formed when an atom loses one or more electrons. And, An anion (negatively charged ion) is formed when an atom gains one or more electrons. In general, When sodium atom (Na) loses one electron, sodium ion (Na +) is formed. Sodium ion (Na +) is positively charged. The Na + ion is a cation. Na â Na + + e-