Effect of pre-press treatments of vegetation on the quality of the extracted leaf protein

The effect of various treatments during processing on the quality of extracted leaf protein concentrates from grass and lucerne has been investigated. There was little difference in the N contents of the heat-coagulated leaf proteins from various extracts. The preparations contained only small amounts of extractable phenolic compounds when polyvinylpyrrolidone (PVP) was present during the extraction procedure. Conversely, all leaf proteins made by processes involving treatment with alkali had a larger phenolic content. Some of the phenolic compounds extracted have been tentatively identified. The amino acid composition and in vitro digestibility, with thioglycollic acid-activated papain, of all preparations were similar. These results are discussed in relation to the known in vivo digestibility of extracted leaf protein concentrates.     

Effects of anxiety on analogical reasoning: A test of three theoretical models.

Three mediational theories of anxiety and performance, namely, J. A. Easterbrook's (see record 1961-03074-001) cue utilization theory, G. Mandler and S. B. Sarason's (see record 1953-02743-001) attentional theory, and M. W. Eysenck's (1979) working memory capacity theory, were compared for their efficacy in explaining anxiety-induced performance decrements on a task of analogical reasoning. 102 undergraduates who varied in their trait and state anxiety levels completed 100 geometric analogies under either relaxed (reassurance, non-time-limited) or stress (ego-threat, time-limited) conditions. Response time and error rate data for 9 levels of task complexity (1-, 2-, and 3-element analogies with 0, 1, or 2 transformations for each element) were analyzed by means of multivariate analysis of variance. Results in the relaxed condition support attentional theory in that more anxious Ss were both slower and less accurate than were less anxious Ss. In the stressed condition, none of the 3 anxiety-performance theories was supported. More anxious Ss were faster but made more errors than did less anxious Ss. Thus, in the stressed condition, performance differences suggested differences in speed–accuracy trade-off strategies rather than differences in processing abilities. The limitations of attentional theory and the need to study the effects of anxiety and time stress on information processing are discussed. (21 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Analysis of immunoglobulin genes in splenic marginal zone lymphoma suggests ongoing mutation

BACKGROUND: The incidence of venous thromboembolism has not been well described, and there are no studies of long-term trends in the incidence of venous thromboembolism. OBJECTIVES: To estimate the incidence of deep vein thrombosis and pulmonary embolism and to describe trends in incidence. METHODS: We performed a retrospective review of the complete medical records from a population-based inception cohort of 2218 patients who resided within Olmsted County, Minnesota, and had an incident deep vein thrombosis or pulmonary embolism during the 25-year period from 1966 through 1990. RESULTS: The overall average age- and sex-adjusted annual incidence of venous thromboembolism was 117 per 100000 (deep vein thrombosis, 48 per 100000; pulmonary embolism, 69 per 100000), with higher age-adjusted rates among males than females (130 vs 110 per 100000, respectively). The incidence of venous thromboembolism rose markedly with increasing age for both sexes, with pulmonary embolism accounting for most of the increase. The incidence of pulmonary embolism was approximately 45% lower during the last 15 years of the study for both sexes and all age strata, while the incidence of deep vein thrombosis remained constant for males across all age strata, decreased for females younger than 55 years, and increased for women older than 60 years. CONCLUSIONS: Venous thromboembolism is a major national health problem, especially among the elderly. While the incidence of pulmonary embolism has decreased over time, the incidence of deep vein thrombosis remains unchanged for men and is increasing for older women. These findings emphasize the need for more accurate identification of patients at risk for venous thromboembolism, as well as a safe and effective prophylaxis.     

Effects of participant modeling on information acquisition and skill utilization.

Assessed the contribution of active participant modeling in coping skills training by evaluating 2 critical process variables: the retention of information about the threatening events and how to cope with them, and the visceral component of imaginal rehearsal. 38 8–13 yr old children, highly fearful of dentists (the Dental subscale of the Children's Fear Survey Schedule), were shown a videotape of 2 children practicing controlled respiration and imagery techniques while undergoing dental treatment. The participant modeling group was encouraged to practice these as they watched the film, whereas the symbolic modeling group was told that this might help them during their own dental treatment, which immediately followed videotape preparation. Ss who had the active participant instructions obtained more information from the videotape, reported greater reduction in dental anxiety, and showed lower respiratory rates as they watched the videotape. They reported greater use of imagery techniques and enhanced self-control. The degree of disruptiveness was significantly lower during subsequent actual dental treatment in Ss from the active practice group. (33 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Psychophysiological treatment of migraine and tension headaches: A 12-month follow-up.

Conducted a 12-mo follow-up of the present authors' (1983) study population of chronic headache sufferers by telephone interviewing 31 chronic migraine and 25 chronic tension headache patients (aged 18–61 yrs) who had been treated with EMG, muscle relaxation, and fingertip temperature training to test a hypothesis of biofeedback placebo effects. A previous 3-mo follow-up had revealed that all treatments had produced significant improvement, and relaxation was not as good as the biofeedback devices for obtaining a reduction in monthly headache hours. At 12-mo follow-up, the 3-mo improvement was sustained overall, but migraineurs as a group appeared to regress slightly, while tension patients improved significantly in the interim. On the basis of a 50% reduction in symptomatology, biofeedback treatment was significantly superior to relaxation for tension headaches, although this had not been true at the 3-mo assessment. Temperature training was at least as effective as EMG for both headache groups. In view of these results, biofeedback treatment is viewed less as placebo administration and more as a secondary reinforcer of a specific but unknown physiological response. (11 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Need for social approval as a predictor of the strategic and outcome aspects of bargaining behaviour in asymmetric power situations: An interactionist approach.

Investigated the effects of need for social approval (NAP) on the outcome (Exp. I) and strategic (Exp. II) aspects of bargaining in 2 mixed-motive nonconstant sum games. An interactionist approach was adopted in that (a) the possible attenuating effects of a contextual variable (differential bargaining power) were examined; and (b) face-to-face open communication was permitted. Exp. I, with 64 male and female undergraduates, shows that low-NAP Ss obtained higher final outcomes than high-NAP Ss only when the former were in the low-power position. Results of Exp. II, with 32 male Ss, support the following conclusions: (a) in the high power position, high-NAP Ss (as opposed to low-NAP Ss) adopt a softer initial bid strategy, exhibit a higher overall level of offers, and reach agreements that yielded them a smaller dyadic profit difference; and (b) in the low-power position, personality differences in NAP do not, as predicted, have a significant effect on strategies employed or final outcomes attained. (French summary) (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

The determination of unsaturation in ethylene propylene terpolymers and butyl rubber with pyridinium bromide perbromide

The reagent pyridinium bromide perbromide (PBPB) has been investigated for the determination of unsaturation in model olefins and in polymers of low total unsaturation. Model olefins give 92%–100% reaction for a 1-hr reaction period. Ethylene propylene terpolymers react quantitatively without substitution or elimination and without second addition reactions when the termonomer unit is 1,4 hexadiene, methylene norbornene, ethylidene norbornene, or cyclooctadiene. Dicyclopentadiene terpolymers react incompletely. These reactions take place in carbon tetrachloride/10% methanol solution, the reagent being added as a methanolic solution. Iodine chloride can also be used under specified conditions for the more reactive termonomer units in this solvent mixture. Under the same conditions the PBPB reagent reacts stoichiometrically with butyl rubber, without second addition or substitution reactions. The unsaturation results also agree with those obtained using bromine or iodine monochloride in carbon tetrachloride solution, but both of these reagents give slight substitution reactions.