HISTORICAL PERSPECTIVE ESSAY Morphogenesis of Flowers—Our Evolving View

HISTORICAL PERSPECTIVE ESSAY Morphogenesis of Flowers—Our Evolving View

In this essay, the time course of our understanding of the structure and function of flowers will first be outlined from prehistoric times to the mid-twentieth century. Information is taken mostly from Sachs (1875), Arber (1950), and especially Morton (1981). More recent studies on the genetic basis of flower development will then be reviewed, focusing on floral organs rather than ovules, seeds...

An "epidemic" of adolescent pregnancy? Some historical considerations.

investigate teenage childbearing in the past. The lack of historical analyses of adolescent pregnancy is particularly unfortunate since policy-makers in Washington might have benefited from a long-term view of this serious problem. In this essay, I will review the contemporary efforts of policy-makers in Washington to deal with adolescent pregnancies, consider how this issue might profit from a...

Hybridity of Scientific Discourses: an Intertextual Perspective and Implications for ESP Pedagogy

In light of a large number of admirable attempts which look at scientific discourse from social, dialogic and interpersonal points of view, the propositions which consider scientific discourse as an interactive endeavor are now well-established. By the force of our social constructivist gyrations, we have developed glimpses of a social, cultural and historical dimension in which the discourse o...

O9: Securing Children in Cars from the Trauma Biomechanical Point of View. A Historical and Global Perspective

Since the 1960 Child Safety Systems in cars have been developed. The 3 point safety belt for adults rated as one of the 10 most important inventions for mankind, the seat belt has saved more than 1.5 Million lives. As well children have to be secured in a car but the 3 point belt is designed for adults. A 27 kg child is forced forward with 1.200 kg at 48 kph impact velocity. Here vulnerable bod...

Cancer research in historical perspective: an autobiographical essay.