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.
Answers. 1  A cation is a positive ion (Na+), it is usually a metal, it is on the left side of a compound, and will normally form a base with the hydroxide ion and one such example is NaOH (Sodium Hydroxide). Hydrogen is an exception to the rule that metals are cations because it has a +1 charge.