Evidence for chemical defense in tropical green algaCaulerpa ashmeadii (Caulerpaceae: Chlorophyta): Isolation of new bioactive sesquiterpenoids

Results of field feeding preference studies with 12 species of tropical green algae of the genusCaulerpa showed thatC. ashmeadii was preferred least by herbivorous fishes. Chemical investigations ofC. ashmeadii demonstrated the presence of high concentrations of sesquiterpenoid metabolites. The chemical isolation and structural elucidation of five majorC. ashmeadii metabolites, as well as the results of field feeding preference, antimicrobial, and ichthyotoxicity assays demonstrating the biological activities of these metabolites are reported here.     

Perceived parental social support and academic achievement: An attachment theory perspective.

[Correction Notice: An erratum for this article was reported in Vol 66(4) of Journal of Personality and Social Psychology (see record 2008-10478-001). This article, which appeared in the Personality and Individual Differences section was accepted for publication by Guest Editor Irwin Sarason. We wish to thank Professor Sarason for his help and to apologize for our oversight in not acknowledging this contribution.] Tested the extent to which parental social support predicted college GPA among undergraduates. A sample of 418 undergraduates completed the Social Provisions Scale—Parent Form (C. E. Cutrona; see record 1990-01422-001) and measures of family conflict and achievement orientation. American College Testing (ACT) Assessment Program college entrance exam scores (American College Testing Program, 1986) and GPA were obtained from the university registrar. Parental social support, especially reassurance of worth, predicted college GPA when controlling for academic aptitude (ACT scores), family achievement orientation, and family conflict. Support from parents, but not from friends or romantic partners, significantly predicted GPA. Results are interpreted in the context of adult attachment theory. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Inventory of interpersonal problems: Psychometric properties and clinical applications.

Describes a new instrument, the Inventory of Interpersonal Problems (IIP), which measures distress arising from interpersonal sources. The IIP meets the need for an easily administered self-report inventory that describes the types of interpersonal problems that people experience and the level of distress associated with them before, during, and after psychotherapy. In Study 1, psychometric data are presented for 103 patients who were tested at the beginning and end of a waiting period before they began brief dynamic psychotherapy. On both occasions, a factor analysis yielded the same six subscales; these scales showed high internal consistency and high test–retest reliability. Study 2 demonstrated the instrument's sensitivity to clinical change. In this study, a subset of patients was tested before, during, and after 20 sessions of psychotherapy. Their improvement on the IIP agreed well with all other measures of their improvement, including those generated by the therapist and by an independent evaluator. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Testing models of school learning: Effects of quality of instruction, motivation, academic coursework, and homework on academic achievement.

Tested the influence of ability, time, quality of instruction, motivation, and academic coursework on students' achievement, controlling for relevant background variables. Structural equation models were analyzed with longitudinal data from a national sample of 25,875 high school students. Intellectual ability and academic coursework had direct effects on achievement, and homework had a smaller direct effect. The indirect effects of quality of instruction and motivation were stronger than their direct effects; quality affected motivation, which affected coursework. Supplemental analyses were consistent with the initial findings. Results support these variables as influences on school learning, and support the theories from which the variables were derived. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Production of a yogurt-like product from plant foodstuffs and whey. Substrate preparation and fermentation

A mixed substrate composed of soya milk, oat flour and dried cheese whey (82, 11 and 7% respectively) had a content of lactose and protein similar to that of milk used for yogurt manufacture. Heat treatment for 20 min at 80°C resulted in a viscosity similar to that of yogurt whilst removing coliform and mesophilic aerobic bacteria, moulds and yeasts. Fermentation with traditional yogurt bacteria did not increase viscosity further, and the final product had similar acidity and texture to yogurt. Acid development, carbohydrate consumption, proteolysis and starters counts were followed during fermentation. The fermentation profile of the mixed substrate was very similar to that of milk.     

Structure of human values: Testing the adequacy of the Rokeach Value Survey.

Examined the extent to which the 36 items of the Rokeach Value Survey (RVS) provide comprehensive and representative coverage of the value domain in 2 experiments. In Exp I, intensive semistructured interviews, based on the RVS, were conducted with 73 adults drawn from an electoral roll. Test–retest reliabilities were examined over 4 wks with 208 university students. In Exp II, factor structure was explored with 483 adults from the general population and with 688 university students. All Ss completed inventories of goal values, mode values, and social values. Data provide qualified support for the comprehensiveness of the instrument. The major weaknesses in sampling involved the facets of physical well-being and individual rights. Other areas not represented were thriftiness and carefreeness. The need for multi-item indices for value constructs is discussed, as are the advantages of a rating procedure over a ranking procedure from both psychometric and empirically valid perspective. An alternative instrument based on the work of Rokeach is proposed. (31 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Study on the acid hydrolysis of Peat: 1. extraction of carbohydrates

Peat and its derived products such as peat extracts or hydrolysates offer a variety of possibilities as raw materials for the development of chemical and biochemical processes. Acid hydrolysis of peat yields soluble carbohydrates which can be utilised as fermentation media. In this work, Sphagnum peat moss was hydrolysed under various conditions of H₂SO₄ concentration, retention time, temperature, peat concentration, peat particle size distribution and original moisture content in the peat. The results suggest that mild conditions of hydrolysis, which will minimise possible negative effects on other nutrients available in peat, are adequate for the release of the carbohydrates present in peat. It was found that peat particle size distribution and original moisture content as well as peat concentration will also affect the yield of carbohydrates obtained.     

Does Head Start work? A 1-year follow-up comparison of disadvantaged children attending Head Start, no preschool, and other preschool programs.

This article examines how successful Project Head Start has been as a preschool program for economically disadvantaged children. Most Head Start evaluations have not controlled for initial differences between Head Start and comparison groups. They have also limited comparisons to those with no preschool experience, rather than considering other preschools as an alternative comparison group. Subjects were 969 disadvantaged children attending Head Start, other preschool, or no preschool in 1969–1970, longitudinally evaluated on a variety of cognitive measures. Large initial group differences were observed between Head Start children and both comparison groups, with those in Head Start at a disadvantage on nearly every demographic and cognitive measure. Adjusting for initial background and cognitive differences, Head Start children showed significantly larger gains on the Preschool Inventory and Motor Inhibition tests than either comparison group, with Black children in Head Start (especially those of below-average initial ability) gaining the most. However, despite substantial gains, Head Start children were still behind their peers in terms of absolute cognitive levels after a year in the program. Head Start proved an impressive instrument of short-term change, even compared with other preschool experience. Gains in behaviors other than intelligence suggest that the effects may not be limited to the cognitive domain. (PsycINFO Database Record (c) 2010 APA, all rights reserved)