Adolescenceâ€"beginning with the onset of puberty and ending in the mid-20sâ€"is a critical period of development during which key areas of the brain mature and develop. These changes in brain structure, function, and connectivity mark adolescence as a period of opportunity to discover new vistas, to form relationships with peers and adults, and to explore one's developing identity. It is also a period of resilience that can ameliorate childhood setbacks and set the stage for a thriving trajectory over the life course. Because adolescents comprise nearly one-fourth of the entire U.S. population, the nation needs policies and practices that will better leverage these developmental opportunities to harness the promise of adolescenceâ€"rather than focusing myopically on containing its risks. This report examines the neurobiological and socio-behavioral science of adolescent development and outlines how this knowledge can be applied, both to promote adolescent well-being, resilience, and development, and to rectify structural barriers and inequalities in opportunity, enabling all adolescents to flourish.

This study is an outgrowth of our interest in the history of modern chemistry. The paucity of reliable, quantitative knowledge about past science was brought home forcibly to us when we undertook a research seminar in the comparative history of modern chemistry in Britain, Germany, and the United States. That seminar, which took place at the University of Pennsylvania in the spring of 1975, was paralleled by one devoted to the work of the "Annales School". The two seminars together catalyzed the attempt to construct historical measures of change in aspects of one science, or "chem ical indicators". The present volume displays our results. Perhaps our labors may be most usefully compared with the work of those students of medieval science who devote their best efforts to the establish ment of texts. Only when acceptable texts have been constructed from fragmentary and corrupt sources can scholars move on to the more satisfying business of making history. So too in the modern period, a necessary pre liminary to the full history of any scientific profession is the establishing of reliable quantitative information in the form of statistical series. This volume does not offer history. Instead it provides certain element- indicators -- that may be useful to individuals interested in the history of American chemistry and chemical industry, and suggestive for policy.

A union list of serials commencing publication after Dec. 31, 1949.

This biography of Nobel Laureate Barbara McClintock (1902-1992) places her life and work in its social, scientific and personal context. The author examines the development of Barbara McClintock’s scientific work and her influence upon individuals and upon the fields of cytogenetics and evolutionary biology in the period from 1902 to the present. The history documents years of McClintock’s notable and lauded scientific work long before she discovered and named transposable elements in the mid-1940s for which she ultimately received the Nobel Prize. The biography employs documented evidence to expose, demystify, and provide clarity for legends and misinterpretations of McClintock’s life and work. Key Features Exposes and demystifies myths and legends told about McClintock’s time in Missouri Clarifies the changing language of genes and genetics Places in perspective the history of McClintock’s research Documents McClintock’s family and early life before college Provides documented details of McClintock’s time in Nazi Germany