Privation relative et programmes d'action positive.

Studied the effects of fraternal relative deprivation (FRD) and relative deprivation on behalf of others (RDO) on the promotion of equality in the work force and participation in affirmative action programs by men and women. Human subjects: 89 male and female French adults (aged 18 yrs and older) (university students). The Ss were given a questionnaire on the situation of women in the work force that asked questions on the cognitive and affective dimensions of relative deprivation, behaviors related to promotion of equality of the sexes, and reactions to programs of affirmative action. Factors associated with FRD and with RDO were determined and analyzed statistically according to age, sex, and social priorities. (English abstract) (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Effects of ethnic, sex, and attitude similarity on counselor credibility.

Surveyed 63 male and 64 female Mexican-American community college students to determine their attitude toward acculturation. Ss were then randomly assigned to receive written material describing the sex, ethnicity, and attitude toward acculturation of a counselor they subsequently heard in a tape-recorded excerpt of a counseling session. After reading the written introduction and listening to the counseling excerpt, Ss rated the counselor's credibility and attractiveness on the Counselor-Effectiveness Rating Scale (CERS). A repeated measures ANOVA revealed a significant interaction between attitude similarity and the repeated factor (CERS subscales). Post hoc analyses indicated that Ss' ratings of their willingness to see the counselor were significantly lower than other credibility ratings for those Ss who were exposed to a counselor with a dissimilar attitude. (10 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Residence time distribution measurements and simulation of the flow pattern in a scraped surface heat exchanger during crystallisation of ice cream

Scraped surface heat exchangers are used in the food industry to process highly viscous fluids, and ice-cream in particular, but most of the time, the influence of operating conditions on product quality is poorly understood. The objective of the study is to develop simple tools to help industrials understand, and then optimise their fabrication process. Residence Time Distribution (RTD) has been characterised in an industrial pilot system during real ice cream production, after the method had been validated in an experimental set-up with a simple mixture of water and sucrose. It has been shown that in its dimensionless form, RTD depend slightly on flow rate and scraper rotational speed. A simple model of flow pattern applicable to SSHE during crystallisation was developed to reproduce the observed RTD. It distinguishes two zones: the volume of fluid near the cooling wall where ice is generated and which is swept by the blades and the volume of fluid near to the rotor. Therefore, the model considers two parallel plug flow reactors with axial dispersion, and which exchange fluid by radial mixing. After adjustment of the model parameters, a good agreement was obtained with experimental results. The flow rate is lower in the zone near the cooling wall; this can be due to a higher ice concentration leading to higher viscosity. This approach can contribute to better understand, optimise and control SSHE used for ice cream production.     

Sensory and quality parameters of raw and processed Chicory-Hindbeh,a commonly consumed dark leafy green in Lebanon (Cichorium intybus L.) during frozen storage

This work aimed at assessing the effect of heat treatment and frozen storage on the sensory and chemical properties of chicory with the goal of optimizing the heat pretreatment-storage condition to best preserve the chemical and sensory properties of chicory. Raw, boiled (10 min), blanched (90 °C for 60 s) and steamed (for 20 s) chicory samples were produced and stored at −6 °C, −12 °C or −18 °C for 4 months. Chemical analyses (moisture, ash, vitamin C, peroxidase activity, chlorophyll and color) and sensory evaluation (QDA and hedonic evaluation) were conducted. Treatment significantly influenced all chemical variables (p < 0.001), except for moisture; and so did freezing temperatures for a-value (p < 0.001), chlorophyll-a, peroxidase activity, vitamin C and ash (p < 0.01), total chlorophyll, moisture and b-value (p < 0.05). Differences were obtained for age for all chemical variables (p < 0.001). Treatments affected consumers' acceptability of chicory and QDA showed that boiled chicory was significantly more tender, less chewy and crunchy and needed less time to disintegrate than other samples. PCA showed that PC1 and PC2 separated attributes based on type and intensity of treatments, respectively. It is recommended to use blanching at 90 °C for 60 s and freezing at −12 °C or −18 °C to best preserve the quality of chicory.     

Etude par diffraction X et microscopie electronique des composes inedits de formule AnBnO3n+2 dans les systems La2Ti2O7CaTiO3, Nd2Ti2O7CaTiO3 et Ca2Nb2O7CaTiO3

New compounds corresponding to the formula A_nB_nO_3n+2 with n = 4,5; 5 and 6 have been found in the two following systems Nd₂Ti₂O₇CaTiO₃ and Ca₂Nb₂O₇CaTiO₃. These compounds have been investigated by electron microscopy. The results obtained are in good agreement with our structural hypothesis.     

La face cachée de l'effet protecteur du désengagement psychologique au travail: Le cas des policiers.

This study has two goals. The first is to provide more information on the asymmetrical and negative link between psychological disengagement mechanisms and self-esteem level. The second is to pursue the investigation of the protective effect of psychological disengagement via the evaluation of another facet of self-esteem that is, its stability. This study conducted amongst 152 policemen confirms that disengagement allows individuals to secure their self-esteem stability. Results militate in favour of the occupation's social status to explain the variable association between disengagement and self-esteem level. In the discussion, we raise the veil on the hidden face of the protective effect of disengagement. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Modeling and simulation of breakthrough curves during purification of two chitosanases from Metarhizium anisopliae using ion-exchange with expanded bed adsorption chromatography

A mathematical model was developed to predict breakthrough curves during purification of the two chitosanases from Metarhizium anisopliae by expanded bed adsorption, taking into account the axial dispersion of liquid and using Streamline DEAE and SP XL adsorbents, anion and cation exchange resins, respectively. All the experiments were performed without clarification (with cells) aiming at the reduction of unit operations in future projects of separation processes, thereby reducing capital and operating costs. Chitosanases are enzymes that hydrolyze the carbohydrate chitosan, resulting in oligosaccharides that have many remarkable biological activities, such as anti-cancer, anti-HIV and antioxidant activities. The two adsorbents had similar performance in relation to hydrodynamics and mass transfer. The results of the parametric sensitivity analysis agree with the literature, and the model was validated with an average high degree of fit (94.68%) between simulated and experimental data obtained in this work.     

Effect of Congeneric Chemical Signals of Different Ages on Foraging Response and Food Choice in the Field by Golden Spiny Mice (Acomys russatus)

The common spiny mice Acomys dimidiatus and golden spiny mice Acomys russatus coexist in the extreme warm and dry parts of the Rift Valley in Israel. However, they are temporally segregated in that the former is nocturnal, whereas the latter is diurnal. Daily rhythms of physiological and behavioral variables in A. russatus responded to semiochemical signals released by A. dimidiatus (in the urine and feces). Both species feed upon the same food items but at different times of the 24-hr cycle. The main aim of the present study was to test under field conditions the foraging response of A. russatus to odors of different ages released by A. dimidiatus. Various feeding and behavioral variables were compared in three groups of A. russatus. The results show that fresh semiochemical signals released by A. dimidiatus decrease the feeding efficiency and increase the rate of smelling from a distance in A. russatus. These results support the idea that temporal segregation between the two coexisting species is at least partly through semiochemicals present in the urine and feces.