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  2. HESI exam - Wikipedia

    en.wikipedia.org/wiki/Hesi_exam

    The HESI Admission Assessment (A 2) is a standardized, computer-based admission test used by some nursing and allied health programs. [3]The exam is 285 minutes (4 hours and 45 minutes) and consists of 275 scored questions.

  3. A2 Key - Wikipedia

    en.wikipedia.org/wiki/A2_Key

    A2 Key (previously known as the Key English Test (KET) and Cambridge English: Key) was developed through trials conducted between 1991 and 1994. [ 2 ] It was created to offer students a basic qualification in English and provide the first step for those wishing to progress towards higher level qualifications, such as B1 Preliminary , B2 First ...

  4. Copper (I) cyanide - Wikipedia

    en.wikipedia.org/wiki/Copper(I)_cyanide

    Copper cyanide is a coordination polymer.It exists in two polymorphs both of which contain -[Cu-CN]- chains made from linear copper(I) centres linked by cyanide bridges.In the high-temperature polymorph, HT-CuCN, which is isostructural with AgCN, the linear chains pack on a hexagonal lattice and adjacent chains are off set by +/- 1/3 c, Figure 1. [5]

  5. Major depressive disorder - Wikipedia

    en.wikipedia.org/wiki/Major_depressive_disorder

    This article needs to be updated. The reason given is: Many outdated sources and information (older than five years). Please help update this article to reflect recent events or newly available information. (July 2024) Medical condition Major depressive disorder Other names Clinical depression, major depression, unipolar depression, unipolar disorder, recurrent depression Sorrowing Old Man (At ...

  6. Alpha helix - Wikipedia

    en.wikipedia.org/wiki/Alpha_helix

    The alpha helix is also commonly called a: Pauling–Corey–Branson α-helix (from the names of three scientists who described its structure); 3.6 13-helix because there are 3.6 amino acids in one ring, with 13 atoms being involved in the ring formed by the hydrogen bond (starting with amidic hydrogen and ending with carbonyl oxygen)