Optimierung von Lupinenmehl für die Aquakultur

Lupine aus ökologischen Anbau stellt eine nachhaltige und kostengünstige Alternative zu Fisch- und Sojamehl in Futtermitteln für die Aquakultur dar. Das Projekt "Optimierung von Lupinenmehl für die Aquakultur" (OLA) entwickelte Verfahren zur Steigerung der Verdaulichkeit von Lupinenmehl in Futtermitteln für karnivoren Wolfsbarsch, und analysierte die Vermarktungschancen von Lupine in der Fischfutterindustrie. Ein Hindernis in der Nutzung pflanzlicher Proteinquellen stellen Substanzen dar, sogenannte antinutritive Substanzen, die die Futteraufnahme und Verdauung von Fischen negativ beeinflussen können. Der Projektpartner, das ttz Bremerhaven, entwickelte in diesem Projekt ein enzymatisches Fermentationsverfahren um diese Substanzen im Lupinenmehl zu reduzieren und Verdaulichkeit und Akzeptanz zu fördern. Die Aquakulturforschung am AWI testete das fermentierte Lupinenmehl gegen herkömmliches Lupinenmehl in steigenden Mengen als Ersatz für Fischmehl in Akzeptanz- und Wachstumsversuchen. Diese zeigten, dass ein Futter mit 50% Lupine vergleichbare Wachstumsraten wie Futter aus 65% Fischmehl hervorbringt. Obwohl die Fermentation eine starke Reduktion der Phytinsäure im Lupinenmehl herbeiführte, hatte dies keine Wirkung auf die Wachstumsperformance bei Tieren über 15 g. Bei kleineren Tieren hatte die Fermentation jedoch eine positive Wirkung auf Wachstum. Enzymatische Analysen zeigten eine signifikante Beeinträchtigung der Verdauungsenzyme durch Lupine. In-vitro Analysen mit der pH-Stat Methode zeigten, dass diese durch Fermentation sowie Toasting reduziert wird. Stakeholderanalysen zeigten eine grundsätzliche positive Bewertung von Lupinen aus ökologischen Landbau als sinnvollen Futtermittelinhaltsstoff. Jedoch wurden Schwankungen beim Angebot, Qualität und Zusammensetzung sehr häufig bei größeren Abnehmern als Ausschluss Kriterium wahrgenommen. Insgesamt zeigte das Projekt, dass Lupinenbasierte Futtermittel (mit oder ohne thermische/ enzymatische Behandlung) sehr gut geeignet sind um sämtliche nutritiven Bedürfnisse der karnivorer Wolfsbarsche zu decken. Lupine wird aber sein Potential als Futtermittelinhaltsstoff nur erfüllen, wenn Engpässe in der Wertschöpfungskette durch Sicherung der Produkt-Qualität und Supply-Chain überwunden werden

The Effectiveness of the Functional Movement Screen and Vertical Drop Jump Test as Screenings to Predict Non-Contact ACL Injury

The purpose of this Clinically Appraised Topic (CAT) was to evaluate the predictive validity of two movement screening tools: the FMS, which evaluates kinematic control during functional movement tasks and the VDJT, which evaluates both kinetic and kinematic variables during a high impulse jump task. With both screening tools looking to identify at risk movement patterns, this CAT sought to evaluate predictive screening ability and determine which tool demonstrated superior ability to stratify non-contact ACL injury risk

“Together, We Can Do This”: The Best Sport Teams Are Greater Than the Sum of Their Parts

Once upon a time, it was believed that the sport team with the best individual star players would be most likely to win all the trophies. Then one day, athletes, coaches, and sport fans, together with scientists (including sport psychologists), noticed that this did not always happen—so people began to doubt the idea. This was a concern because, for coaches to create great sport teams that can reach their potentials, the key ingredients for team success must be understood. Over time, there has been a shift from looking at the talent of individual star players to looking at teamwork. In this article, you’ll discover how the feeling of connection and relationship between players—their sense of togetherness—is the key ingredient in sport-team success. You will also learn some ideas for how to develop togetherness

Inter-annual and inter-seasonal variability of the Orkney wave power resource

The waters surrounding the Orkney archipelago in the north of Scotland are one of the key regions in the world suitable for exploitation of both wave and tidal energy resources. Accordingly, Orkney waters are currently host to 1.08 GW of UK Crown Estate leased wave and tidal energy projects, with a further 0.5 GW leased in the southern part of the adjacent Pentland Firth. Although several wave resource models exist of the region, most of these models are commercial, and hence the results not publicly available, or have insufficient spatial/temporal resolution to accurately quantify the wave power resource of the region. In particular, no study has satisfactorily resolved the inter-annual and inter-seasonal variability of the wave resource around Orkney. Here, the SWAN wave model was run at high resolution on a high performance computing system, quantifying the Orkney wave power resource over a ten year period (2003–2012), a decade which witnessed considerable inter-annual variability in the wave climate. The results of the validated wave model demonstrate that there is considerable variability of the wave resource surrounding Orkney, with an extended winter (December–January–February–March, DJFM) mean wave power ranging from 10 to 25 kW/m over the decade of our study. Further, the results demonstrate that there is considerably less uncertainty (30%) in the high energy region to the west of Orkney during winter months, in contrast to much greater uncertainty (60%) in the lower energy region to the east of Orkney. The DJFM wave resource to the west of Orkney correlated well with the DJFM North Atlantic Oscillation (NAO). Although a longer simulated time period would be required to fully resolve inter-decadal variability, these preliminary results demonstrate that due to considerable inter-annual variability in the NAO, it is important to carefully consider the time period used to quantify the wave power resource of Orkney, or regions with similar exposure to the North Atlantic. Finally, our study reveals that there is significantly less variability in the practical wave power resource, since much of the variability in the theoretical resource is contained within relatively few extreme events, when a wave device enters survival mode

Advice for Athletes During Covid-19

This document aims to provide psychological support and guidance for athletes during the current Covid-19 pandemic. Since 23 March, lockdown in the United Kingdom has meant extreme changes and athletes have been forced to significantly alter their training and competition routines. These changes can lead to feelings of anxiety, frustration, and anger for some, and this guidance aims to help alleviate these emotions. The Covid-19 lockdown can be called a non-normative transition* (c.f.2) in sport, this means that it was unexpected and could not be prepared for. This can make it more difficult to manage, and have negative consequences for mental health and psychological wellbeing. This Covid-19 transition will be overwhelming for some – posing many questions around the uncertainty of how long the lockdown period will last, the effect of lockdown on long-term goals for training and competition, and further doubts about what the transition process of emerging from lockdown will look like. We will offer psychological advice to help you deal effectively with the Covid-19 transition, and to place you in a better position to deal with the psychological and behavioural challenges the current situation poses, regardless of when, and if, you return to sport. Three key priorities have been identified which have been shown to be critical for managing transitions, such as the Covid-19 transition

Emission of Circularly Polarized Terahertz Wave from Inhomogeneous Intrinsic Josephson Junctions

We have theoretically demonstrated the emission of circularly-polarized terahertz (THz) waves from intrinsic Josephson junctions (IJJs) which is locally heated by an external heat source such as the laser irradiation. We focus on a mesa-structured IJJ whose geometry is slightly deviate from a square and find that the local heating make it possible to emit circularly-polarized THz waves. In this mesa, the inhomogeneity of critical current density induced by the local heating excites the electromagnetic cavity modes TM (1,0) and TM (0,1), whose polarizations are orthogonal to each other. The mixture of these modes results in the generation of circularly-polarized THz waves. We also show that the circular polarization dramatically changes with the applied voltage. The emitter based on IJJs can emit circularly-polarized and continuum THz waves by the local heating, and will be useful for various technological application.Comment: 5 pages, 3 figure

Supporting Youth Athletes During Covid-19

This document aims to provide psychological guidance for parents and guardians of youth athletes during the current Covid-19 pandemic. Since lockdown (on 23 March 2020), and the subsequent emergence from lockdown in the United Kingdom (UK), youth athletes have been forced to significantly change their training, with the cancellation of formal training sessions and reintegration with social distancing. Throughout this time competitive sport was suspended, and in this transition phase, it is still unclear when all competitions will commence. These changes for some can lead to feelings of anxiety, frustration, and uncertainty. We offer psychological guidance to help parents and guardians maintain their own wellbeing, and support their children in their return to competitive sport. Three key priorities have been identified as critical for supporting youth athletes in managing the Covid-19 transition. These include: 1. Self-management for parents and guardians 2. Navigating uncertainty 3. Motivation and goal settin