DNA microarray wet lab simulation brings genomics into the high school curriculum

We have developed a wet lab DNA microarray simulation as part of a complete DNA microarray module for high school students. The wet lab simulation has been field tested with high school students in Illinois and Maryland as well as in workshops with high school teachers from across the nation. Instead of using DNA, our simulation is based on pH indicators, which offer many ideal teaching characteristics. The simulation requires no specialized equipment, is very inexpensive, is very reliable, and takes very little preparation time. Student and teacher assessment data indicate the simulation is popular with both groups, and students show significant learning gains. We include many resources with this publication, including all prelab introductory materials (e.g., a paper microarray activity), the student handouts, teachers notes, and pre- and postassessment tools. We did not test the simulation on other student populations, but based on teacher feedback, the simulation also may fit well in community college and in introductory and nonmajors' college biology curricula.     

Performing Bandung: China’s dance diplomacy with India,Indonesia, and Burma, 1953–1962

While dance was a common element of international diplomacy activities around the world during the 1950s and early 1960s, scholars have only recently begun to focus attention on this topic, especially as it concerns relationships forged beyond those of the Cold War superpowers. Using previously unexamined historical materials such as rare photographs and performance programs, dancer biographies, autobiographies and personal interviews, unpublished institutional histories, and contemporary periodicals, this article demonstrates not only that dance was an integral part of China’s inter-Asian cultural exchange between 1953 and 1962, but also that the PRC developed a distinct approach to dance diplomacy. Through a series of exchanges with India, Indonesia and Burma, China’s foreign ministers and dancers developed and refined a method of dance diplomacy in which the primary goal was to learn from, rather than export to, these neighboring countries. This approach harnessed the affective power of embodied aesthetic culture to literally “perform” Bandung ideals, namely, cooperation and mutual respect among Asian nations and an anti-imperialist cultural stance. Through the establishment in 1962 of the Oriental Song and Dance Ensemble, the PRC institutionalized this model of dance diplomacy, expanding it to include the entire Third World. Bandung-era dance diplomacy initiatives of the 1950s and early 1960s not only supported important new international alliances and political movements, but also asserted China’s self-identity as part of the East in the way that challenged Eurocentric ideals previously entrenched in China’s domestic dance field.     

Postural stability,clicker reaction time and bow draw force predict performance in elite recurve archery

Recurve archery is an Olympic sport that requires extreme precision, upper body strength and endurance. The purpose of this research was to quantify how postural stability variables both pre- and post-arrow release, draw force, flight time, arrow length and clicker reaction time, collectively, impacted on the performance or scoring outcomes in elite recurve archery athletes. Thirty-nine elite-level recurve archers (23 male and 16 female; mean age?=?24.7?±?7.3 years) from four different countries volunteered to participate in this study prior to competing at a World Cup event. An AMTI force platform (1000Hz) was used to obtain centre of pressure (COP) measurements 1s prior to arrow release and 0.5s post-arrow release. High-speed footage (200Hz) allowed for calculation of arrow flight time and score. Results identified clicker reaction time, draw force and maximum sway speed as the variables that best predicted shot performance. Specifically, reduced clicker reaction time, greater bow draw force and reduced postural sway speed post-arrow release were predictors of higher scoring shots. It is suggested that future research should focus on investigating shoulder muscle tremors at full draw in relation to clicker reaction time, and the effect of upper body strength interventions (specifically targeting the musculature around the shoulder girdle) on performance in recurve archers.     

Fact and fantasy in chemical analysis

Chemical analysis is now so precise and sophisticated a science that it is difficult to appreciate that scarcely a century ago its deficiencies were a cause for public scandal. This article reviews some of the main causes for complaint and how they were remedied.