While minerals may be similar in composition—. comprised of the same element—their crystal structure is what mitigates their individual chemistry, reactivity and appearance. To illustrate this point, one only needs to consider the carbon minerals of graphite and diamonds. While bother are comprised solely of carbon, both have strikingly different properties: graphite is black and soft while diamonds are shinny and hard. The reason for the difference between these two minerals is not the constituent element; rather it is the crystal lattice that comprises each mineral.
William Masters and Virginia Johnson have been widely recognized for their contributions to sexual, psychological, and psychiatric research, particularly for their theory of a four-stage model of sexual response (also known as, the human sexual response cycle ) and their study of sexual response among the elderly. Numbered among their awards are acknowledgements from the American Association of Sex Educators, Counselors and Therapists in 1978, and the American Association of Sex Educators, Counselors and Therapists in 1985 and 1992. The Society for Sex Research and Therapy grant the Masters and Johnson annual award for research.