Red pigment production by Penicillium purpurogenum GH2 is influenced by pH and temperature

The combined effects of pH and temperature on red pigment production and fungal morphology were evaluated in a submerged culture of Penicillium purpurogenum GH2, using Czapek-Dox media with d-xylose as a carbon source. An experimental design with a factorial fix was used: three pH values (5, 7, and 9) and two temperature levels (24 and 34 °C) were evaluated. The highest production of red pigment (2.46 g/L) was reached with a pH value of 5 and a temperature of 24 °C. Biomass and red pigment production were not directly associated. This study demonstrates that P. purpurogenum GH2 produces a pigment of potential interest to the food industry. It also shows the feasibility of producing and obtaining natural water-soluble pigments for potential use in food industries. A strong combined effect (p<0.05) of pH and temperature was associated with maximal red pigment production (2.46 g/L).     

Emotional support and adjustment over a year's time following sexual abuse discovery

OBJECTIVE: This study investigated age and gender differences in perceived emotional support in children and adolescents who experienced sexual abuse from the time of discovery to 1 year later. Also examined were the relations among sources of support and adjustment and whether support explained resilience, defined as better adjustment over a year's time. METHOD: One hundred and forty-seven sexually abused youth were interviewed at the time of discovery (T1) and 1 year later (T2). Information gathered included severity of the sexual abuse, satisfaction with support from caregivers, same-sex and other-sex friends, feelings of shame about the abuse, and attributional style. Youth adjustment was measured using reports from the youth themselves, caregivers, and teachers. RESULTS: Children reported the most satisfaction with support from caregivers followed by friends whereas adolescents reported similar levels of support from friends and caregivers. Satisfaction with support was differentially related to adjustment. Youth who reported more satisfaction with caregiver support at T1, reported less depression, better self-esteem but more sexual anxiety 1 year later. More satisfaction with support from friends predicted lower self-esteem but less sexual anxiety. More satisfaction with initial caregiver support at T1 predicted better parent- and teacher-rated adjustment 1 year later, after controlling for initial adjustment. CONCLUSIONS: In general, initial caregiver emotional support at the time of abuse discovery predicted resilience in child and adolescent victims of sexual abuse. Findings suggested that treatment should include a focus on helping caregivers provide appropriate emotional support.     

Opinion and the world of possibilities

Editor's Note: This is the concluding essay in a three-part series in which Professor Morson examines the intellectual maladies of the intelligentsia. The first essay, which appeared in the Spring 1993 issue, drew upon Russian intellectual history to clarify the concept of “the intelligentsia” and suggested its utility for an understanding of the politicized segment of the American professoriate. In the second essay, which appeared in the Winter 1993–94 issue, he contrasted the deterministic theories so attractive to both these groups with choice as experienced in the day-to-day realm of contingent events. Continuing this analysis, Professor Morson now examines “chronocentrism,” the view that the present moment is intellectually privileged in comparison with the past, showing it to be another of the basic elements of utopian thought. Exploring the relationship of multiple possibilities to intellectual freedom and pluralism, Professor Morson argues that there is a close connection between the appreciation of “open time” on the one hand, and the belief in free-wheeling dialogue, the tolerance necessary for democracy, intellectual modesty in the face of the world's complexity, and a rich sense of opinion, on the other. This essay is an adaptation of the final chapter of his new book,Narrative and Freedom: The Shadows of Time, and appears by the generous permission of Yale University Press.     

Centering the Margins: White preservice teachers' responses to Roll of Thunder

Over the course of several years, the award-winning adolescent novel, Roll of Thunder, Hear My Cry , was used as the centerpiece for a study of white, female preservice teachers' perceptions of race as an issue in classroom discourse. Invented dialogues created by these preservice teachers were examined to learn more about the issues that troubled them as they considered teaching this novel in the future. They identified language, "reverse racism" and creating distress among children as particularly salient concerns. Examples from these teacher candidates are explicated and theorized.