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91Protein structure — Proteins are an important class of biological macromolecules present in all biological organisms, made up of such elements as carbon, hydrogen, nitrogen, phosphorus, oxygen, and sulfur. All proteins are polymers of amino acids. The polymers, also …
92Discovery and development of antiandrogens — In the 1960s, the first antiandrogen, or androgen antagonist, was discovered. Antiandrogens antagonise the androgen receptor (AR) and thereby block the biological effects of testosterone and dihydrotestosterone (DHT). Antiandrogens are important… …
93Mitochondrion — For the metal band, see Mitochondrion (band). Two mitochondria from mammalian lung tissue displaying their matrix and membranes as shown by electron microscopy …
94Typewriter — Mechanical desktop typewriters, such as this Underwood Five, were long time standards of government agencies, newsrooms, and offices …
95Nusselt number — In heat transfer at a boundary (surface) within a fluid, the Nusselt number is the ratio of convective to conductive heat transfer across (normal to) the boundary. Named after Wilhelm Nusselt, it is a dimensionless number. The conductive… …
96Charles Holden — Charles Henry Holden Portrait of Charles Holden by Benjamin Nelson, 1910 Born 12 May 1875(1875 05 12) Great Lever, Bolton, Lancashire, England …
97Ethylene oxide — Oxirane redirects here. For oxiranes as a class of molecules, see epoxide. Ethylene oxide …
98Site-specific recombination — ite specific recombinationIn site specific recombination, DNA strand exchange takes place between segments possessing only a limited degree of sequence homology (Kolb 2002; Coates et al., 2005). Site specific recombinases perform rearrangements… …
99theatre — /thee euh teuhr, theeeu /, n. theater. * * * I Building or space in which performances are given before an audience. It contains an auditorium and stage. In ancient Greece, where Western theatre began (5th century BC), theatres were constructed… …
100African dance — Introduction performing art deeply woven into the social fabric of Africa and generally involving aspects of music and theatre as well as rhythmic bodily movement. See also African music and mask. The cultural position of dance In African… …
