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This article describes a simple exercise using a free, easy-to-use, established online program. The exercise helps to reinforce protein purification concepts and introduces undergraduates to pH as a parameter that affects anion-exchange chromatography. The exercise was tested with biochemistry majors at California State University-Chico. Given the versatility of the program, this work is also a model for instructors that wish to develop their own exercise to help teach other protein purification techniques.

A novel method was developed for locating and allowing gliders to stay in thermals (convective updrafts). The method was applied to a 5 kg, glider, called ALOFT (autonomous locator of thermals), that was entered in the 2008 Montague Cross-Country Challenge held on 13-15 June 2008 in Montague, California. In this competition, remote-controlled gliders in the 5 kg class competed on the basis of speed and distance. ALOFT was the first known autonomously soaring aircraft to enter a soaring competition and its entry provided a valuable comparison between the effectiveness of manual soaring and autonomous soaring. ALOFT placed third in the competition in overall points, outperforming manually-flown aircraft in its ability to center and use updrafts, especially at higher altitudes and in the presence of wind, to fly more optimal airspeeds, and to fly directly between turn points. The results confirm that autonomous soaring is a bona fide engineering subdiscipline, which is expected to be of interest to engineers, who might find that this has some utility in the aviation industry. [ABSTRACT FROM AUTHOR]

Impulsiveness has become a key concept in thinking about the determinants of violence and aggression. In this study of spouse abusers, the relationship between impulsiveness, impulsive aggression, and physical violence is confirmed. Impulsiveness and impulsive aggression have significant correlations with physical aggression. Impulsiveness and impulsive aggression are also correlated with measures of Borderline Personality Disorder and Antisocial Personality Disorder. In addition, the measures of Borderline and Antisocial Personality Disorder (PD) are significantly correlated with physical aggression. The violent and non-violent groups differed on impulsive aggression and on Borderline Personality Disorder. A partial replication of Tweed and Dutton's findings (1998) revealed sub-groups of high- and low-violence men. The high-violence group was very different from the low-violent and the non-violent groups. The high-violence group had higher pathology scores on all clinical scales, except Mania, of the Personality Assessment Inventory. These findings have implications for violence prediction and for treatment of violent men.