Effect of boiling on biochemical composition of raw Cassia Tora seeds and its potential as feed ingredient in poultry feeds

Effect of the duration of boiling on the proximate, mineral and anti-nutritional factors of Cassia tora seeds was investigated. Boiling lasted for 30, 60 and 90 minutes, after which the seeds were dried in an oven at 60oC for 24 hours, ground and analyzed. Results showed that raw seeds of C. tora contained 9.63% crude protein (CP) compared to 13.13%, 14.01% and 13.57% for 30, 60 and 90 minutes of boiling respectively. The dry matter was increased above 30 minutes of boiling. Fibre, ash, ether extract, nitrogen free extract and gross energy were reduced (P<0.05) by boiling. Boiling did not influence the mineral composition of the seeds. Generally boiling reduced the anti-nutritional factors. Boiling for 90 minutes compared to other durations led to 64.36%, 68.62%, 44.86% and 19.56% reductions in tannins, HCN, saponins and phytate respectively. In conclusion, raw Cassia tora seeds has potential for inclusion in poultry feeds and should be boiled at least for 30 minutes to reduce the anti-nutritional factors and improve its nutritive value especially the crude protein. Keywords: anti-nutritional factors, boiling, cassia tora, mineral, proximat

Early parenting intervention: Family risk and first-time parenting related to intervention effectiveness

The effects of cumulative risk and parity on the effectiveness of a home based parenting intervention were tested in a randomized controlled trial with 237 families with 1- to 3-year-old children screened for high levels of externalizing behavior. The intervention was aimed at enhancing positive parenting and decreasing externalizing behaviors. The results showed that cumulative risk was not associated with either change in child externalizing behaviors or change in positive parenting. When intervention effectiveness was compared for primiparas (i.e., first-time mothers) versus multiparas (i.e., mothers with more than one child), we found that intervention mothers of first-born children displayed an increase in their use of positive discipline strategies as compared to first-time mothers in the control group, whereas a similar effect for multiparas was absent. Among multiparas we found an intervention effect on sensitivity, with control group mothers showing an increase in sensitivity, whereas the intervention group showed a constant level of sensitivity over time. These results suggest that parity may be a moderator of intervention effectiveness. Implications for investigating moderators of intervention effectiveness are discussed. © 2007 Springer Science+Business Media, LLC

Value transmission in primary schools: are teachers’ acculturation orientations a moderator?

The transmission of human values to primary school pupils is key, which is acknowledged in curricula in a variety of cultural contexts worldwide. The present study presents data from the multicultural and multilingual region of Bolzano in Northern Italy (n = 422 pupils in k = 30 classrooms). In addition to class teachers’ values as predictors of their pupils’ values we investigated whether teachers’ acculturation orientations would strengthen the relationship between teachers’ and children’s values, thereby acting as moderators. We focused on the opposing acculturation orientations of integration-transformation versus exclusion. A multilevel analysis showed that teachers’ conservation values (tradition, conformity, and security) significantly predicted their pupils’ conservation values, and that teachers’ openness to change values (self-direction, stimulation, and hedonism) significantly predicted their pupils’ openness to change values. This indicates successful value transmission in the classroom. Teachers’ self-transcendence (benevolence and universalism) and self-enhancement (achievement and power) values did not significantly predict pupils’ values. As expected, teachers’ acculturation orientations were related to their values, but they did not play a role in predicting pupils’ values. Implications for value transmission in the school context and for acculturation research are discussed

Can Non-lytic CD8+T Cells Drive HIV-1 Escape?

The CD8+ T cell effector mechanisms that mediate control of HIV-1 and SIV infections remain poorly understood. Recent work suggests that the mechanism may be primarily non-lytic. This is in apparent conflict with the observation that SIV and HIV-1 variants that escape CD8+ T cell surveillance are frequently selected. Whilst it is clear that a variant that has escaped a lytic response can have a fitness advantage compared to the wild-type, it is less obvious that this holds in the face of non-lytic control where both wild-type and variant infected cells would be affected by soluble factors. In particular, the high motility of T cells in lymphoid tissue would be expected to rapidly destroy local effects making selection of escape variants by non-lytic responses unlikely. The observation of frequent HIV-1 and SIV escape poses a number of questions. Most importantly, is the consistent observation of viral escape proof that HIV-1- and SIV-specific CD8+ T cells lyse infected cells or can this also be the result of non-lytic control? Additionally, the rate at which a variant strain escapes a lytic CD8+ T cell response is related to the strength of the response. Is the same relationship true for a non-lytic response? Finally, the potential anti-viral control mediated by non-lytic mechanisms compared to lytic mechanisms is unknown. These questions cannot be addressed with current experimental techniques nor with the standard mathematical models. Instead we have developed a 3D cellular automaton model of HIV-1 which captures spatial and temporal dynamics. The model reproduces in vivo HIV-1 dynamics at the cellular and population level. Using this model we demonstrate that non-lytic effector mechanisms can select for escape variants but that outgrowth of the variant is slower and less frequent than from a lytic response so that non-lytic responses can potentially offer more durable control

Understanding root, tuber, and banana seed systems and coordination breakdown: a multistakeholder framework

Vegetatively propagated crop (VPC) seed tends to remain true to varietal type but is bulky, often carries disease, and is slow to produce. So VPC seed needs to be handled differently than that of other crops, e.g., it tends to be sourced locally, often must be fresh, and it is less often sold on the market. Hence, a framework was adapted to describe and support interventions in such seed systems. The framework was used with 13 case studies to understand VPC seed systems for roots, tubers, and bananas, including differing roles and sometimes conflicting goals of stakeholders, and to identify potential coordination breakdowns when actors fail to develop a shared understanding and vision. In this article, we review those case studies. The framework is a critical tool to (a) document VPC seed systems and build evidence; (b) diagnose and treat coordination breakdown and (c) guide decision-makers and donors on the design of more sustainable seed system interventions for VPCs. The framework can be used to analyze past interventions and will be useful for planning future VPC seed programs