41. Large tetrads are occasionally observed, particularly when cells in stationary growth phase are transferred to fresh media. 42. However, structural analysis suggests that the conserved putative ion channel formed by the tetrad core is intact. 43. Now, one can construct a complex null tetrad which is adapted to the ingoing null radial geodesics: 44. Full analysis of the geometry and mechanics of an IH relies on the on-horizon adapted tetrad . 45. The covariant derivative \ nabla _ a is defined to annihilate the tetrad E _ a ^ I. 46. The Valentinian Secundus divided the Ogdoad into a right-hand and a left-hand Tetrad ( Iren. 47. In 1978 he was visited by John Wetton and W . J . Hutcheson, his bandmates in Tetrad . 48. Divine triads, tetrads , and ogdoads in Gnostic thought often are closely related to Neo-Pythagorean arithmology. 49. Any tensor can locally be written in terms of this coordinate tetrad or a general ( co ) tetrad. 50. Any tensor can locally be written in terms of this coordinate tetrad or a general ( co ) tetrad .
