Interlaboratory study on lipid oxidation during accelerated storage trials with rapeseed and sunflower oil analyzed by conjugated dienes as primary oxidation products

11 Páginas.-- 5 Figuras.-- 2 Tablas.-- Material suplementarioAccelerated storage tests are frequently used to assess the oxidative stability of foods and related systems due to its reproducibility. Various methods and experimental conditions are used to measure lipid oxidation. Differences between laboratories make it necessary to determine the repeatability and reproducibility of oxidation tests performed under the same conditions. The objective of the present interlaboratory study was to evaluate the outcome of a storage test for two different bulk oils, sunflower oil (SFO) and rapeseed oil (RSO), during a period of 9 weeks at 20°C, 30°C, 40°C, and 60°C. Sixteen laboratories were provided with bottled oils and conducted the storage tests according to a detailed protocol. Lipid oxidation was monitored by the formation of conjugated dienes (CD) and the activation energy (Ea) was determined for comparative purposes and statistically evaluated. An increase in CD formation was observed for both oils when the storage temperature was increased in all laboratories. The Ea,1 ranged from 47.9 to 73.3 kJ mol−1 in RSO and from 27.8 to 62.6 kJ mol−1 in SFO, with average values of 58.2 and 46.8 kJ mol−1, respectively. The reproducibility coefficients were 10.9% and 18.2% for RSO and SFO, respectively. Practical applications: In order to compare results on oxidative stability of foods derived from different studies, the reproducibility of storage tests and methods employed to evaluate the oxidation level should be considered. This study provides fundamental data on the reproducibility of lipid oxidation under accelerated storage conditions and defines important parameters to be considered for the conduction of experiments.Open access funding enabled and organized by Projekt DEAL. We thank Brökelmann + Co – Oelmühle GmbH + Co for the donation of the vegetable oils. The authors gratefully acknowledge Lina Stuthmann from the Food Technology Division, Kiel University and Inge Holmberg from the National Food Institute, Technical University of Denmark for their skillful help.Peer reviewe

Sápmi in a time of change : A study of Swedish Sami living conditions during the twentieth century from a gender and ethnic perspective

This dissertation is a study of the changing living conditions for the Sami in Swedish Såpmi (Samiland) throughout the twentieth century with an analysis based on a gender and ethnic perspective. At the turn of the century, the Sami lived as nomadic reindeer herders and were primarily self- sufficient. This changed as the reindeer herders shifted from a self-sufficient lifestyle to a money economy tor a variety of reasons. Over time they became more integrated in the dominant Swedish society and even more dependent on it. Reindeer herding has become increasingly mechanized since the I960's with rationalizations as a result. Even in to the 1990's the industry was the object of streamlining ettorts. A process of masculinization has also occurred and today's reindeer herding is a distinctly male coded profession. Women do not regularly participate in the daily work of reindeer breeding and their ability to have any direct influence on the herding districts (sameby) is limited. This is also largely true in terms of the Sami Parliament, the Sami popularly elected body. The Sami population has experienced unfavorable special legislation and regulation from the State. The population was divided into several different categories with different rights. Sami women were marginalized two-fold and subordinated, partly because of their ethnic affiliation (as Sami) and partly because of their sex (as women). This continues to be true today. The analysis of gender division of labor shows that a married couple had their own autonomous areas of power within the household. The wife was however still subordinate to her husband in his role as master of the family. The older reindeer herding society was not noted for its equality. There was a distinct hierarchy based on sex, age, and social status. Division of labor in modern reindeer breeding is in principle based on the same normative system as the older nomadic society. The study of the ethnic processes in Såpmi shows among other things that from a Sami perspective, a person is Sami who is related to other Sami and whose actions are based on a Sami identity. It is also clear today that there are many different Sami identities, that an individual person draws from a number of such identities and that it is the context that determines which of these are active in any given situation. The Sami identity is sex-based, i.e. there is a difference between a "male Sami" and a "female Sami." Sami women, unlike Sami men, cannot be politically active while also being active based on their sexual identity. Were they to do so, they would be excluded by definition from their ethnic group. Sami women must therefore subordinate themselves as women to be "genuine" Sami. They thereby contribute to their own marginalization and help maintain their own subordinated position in the Sami society.digitalisering@um

Sápmi in a time of change : A study of Swedish Sami living conditions during the twentieth century from a gender and ethnic perspective

This dissertation is a study of the changing living conditions for the Sami in Swedish Såpmi (Samiland) throughout the twentieth century with an analysis based on a gender and ethnic perspective. At the turn of the century, the Sami lived as nomadic reindeer herders and were primarily self- sufficient. This changed as the reindeer herders shifted from a self-sufficient lifestyle to a money economy tor a variety of reasons. Over time they became more integrated in the dominant Swedish society and even more dependent on it. Reindeer herding has become increasingly mechanized since the I960's with rationalizations as a result. Even in to the 1990's the industry was the object of streamlining ettorts. A process of masculinization has also occurred and today's reindeer herding is a distinctly male coded profession. Women do not regularly participate in the daily work of reindeer breeding and their ability to have any direct influence on the herding districts (sameby) is limited. This is also largely true in terms of the Sami Parliament, the Sami popularly elected body. The Sami population has experienced unfavorable special legislation and regulation from the State. The population was divided into several different categories with different rights. Sami women were marginalized two-fold and subordinated, partly because of their ethnic affiliation (as Sami) and partly because of their sex (as women). This continues to be true today. The analysis of gender division of labor shows that a married couple had their own autonomous areas of power within the household. The wife was however still subordinate to her husband in his role as master of the family. The older reindeer herding society was not noted for its equality. There was a distinct hierarchy based on sex, age, and social status. Division of labor in modern reindeer breeding is in principle based on the same normative system as the older nomadic society. The study of the ethnic processes in Såpmi shows among other things that from a Sami perspective, a person is Sami who is related to other Sami and whose actions are based on a Sami identity. It is also clear today that there are many different Sami identities, that an individual person draws from a number of such identities and that it is the context that determines which of these are active in any given situation. The Sami identity is sex-based, i.e. there is a difference between a "male Sami" and a "female Sami." Sami women, unlike Sami men, cannot be politically active while also being active based on their sexual identity. Were they to do so, they would be excluded by definition from their ethnic group. Sami women must therefore subordinate themselves as women to be "genuine" Sami. They thereby contribute to their own marginalization and help maintain their own subordinated position in the Sami society.digitalisering@um

Therapists’ perspective on virtual reality based treatments in patients after stroke : a qualitative study reporting focus group results from three hospitals

Background. During the past decade, virtual reality (VR) has become a new component in the treatment of patients after stroke. Therefore aims of the study were (a) to get an insight into experiences and expectations of physiotherapists and occupational therapists in using a VR training system and (b) to investigate relevant facilitators, barriers, and risks for implementing VR training in clinical practice. Methods. Three focus groups were conducted with occupational therapists and physiotherapists, specialised in rehabilitation of patients after stroke. All data were audio-recorded and transcribed verbatim. The study was analysed based on a phenomenological approach using qualitative content analysis. Results. After code refinements, a total number of 1289 codes emerged out of 1626 statements. Intercoder reliability increased from 53% to 91% until the last focus group. The final coding scheme included categories on a four-level hierarchy: first-level categories are (a) therapists and VR, (b) VR device, (c) patients and VR, and (d) future prospects and potential of VR developments. Conclusions. Results indicate that interprofessional collaboration is needed to develop future VR technology and to devise VR implementation strategies in clinical practice. In principal, VR technology devices were seen as supportive for a general health service model

DiDuSoNet: A P2P architecture for distributed Dunbar-based social networks

Online Social Networks (OSNs) are becoming more and more popular on the Web. Distributed Online Social Networks (DOSNs) are OSNs which do not exploit a central server for storing users data and enable users to have more control on their profile content, ensuring a higher level of privacy. In a DOSN there are some technical challenges to face. One of the most important challenges is the data availability problem when a user is offline. In this paper we propose DiDuSoNet, a novel P2P Distributed Online Social Network where users can exercise full access control on their data. Our system exploits trust relationships for providing a set of important social services, such as trustness, information diffusion, and data availability. In this paper we show how our system manages the problem of data availability by proposing a new P2P dynamic trusted storage approach. By following the Dunbar concept, our system stores the data of a user only on a restricted number of friends which have regular contacts with him/her. Differently from other approaches, nodes chosen to keep data replicas are not statically defined but dynamically change according to users churn. In according to our previous work, we use only two online profile replicas at time. By using real Facebook data traces we prove that our approach offers high availability

Intensive virtual reality-based training for upper limb motor function in chronic stroke: a feasibility study using a single case experimental design and fMRI

Purpose: To evaluate feasibility and neurophysiological changes after virtual reality (VR)-based training of upper limb (UL) movements. Method: Single-case A-B-A-design with two male stroke patients (P1:67 y and 50 y, 3.5 and 3 y after onset) with UL motor impairments, 45-min therapy sessions 5×/week over 4 weeks. Patients facing screen, used bimanual data gloves to control virtual arms. Three applications trained bimanual reaching, grasping, hand opening. Assessments during 2-week baseline, weekly during intervention, at 3-month follow-up (FU): Goal Attainment Scale (GAS), Chedoke Arm and Hand Activity Inventory (CAHAI), Chedoke-McMaster Stroke Assessment (CMSA), Extended Barthel Index (EBI), Motor Activity Log (MAL). Functional magnetic resonance imaging scans (FMRI) before, immediately after treatment and at FU. Results: P1 executed 5478 grasps (paretic arm). Improvements in CAHAI (+4) were maintained at FU. GAS changed to +1 post-test and +2 at FU. P2 executed 9835 grasps (paretic arm). CAHAI improvements (+13) were maintained at FU. GAS scores changed to -1 post-test and +1 at FU. MAL scores changed from 3.7 at pre-test to 5.5 post-test and 3.3 at FU. Conclusion: The VR-based intervention was feasible, safe, and intense. Adjustable application settings maintained training challenge and patient motivation. ADL-relevant UL functional improvements persisted at FU and were related to changed cortical activation patterns. Implications for Rehabilitation YouGrabber trains uni- and bimanual upper motor function. Its application is feasible, safe, and intense. The control of the virtual arms can be done in three main ways: (a) normal (b) virtual mirror therapy, or (c) virtual following. The mirroring feature provides an illusion of affected limb movements during the period when the affected upper limb (UL) is resting. The YouGrabber training led to ADL-relevant UL functional improvements that were still assessable 12 weeks after intervention finalization and were related to changed cortical activation patterns