Environmental chemicals are transported to the Arctic through the air and oceans, once within the Arctic they spread through rivers, lakes and other watercourses. Polar bears and sledge dogs in-gest high concentrations of environmental chemicals since many of the chemicals are fat-soluble and their diet mainly consists of marine mammals. The aim of this study is to describe how environmental chemicals spread in nature, how they reach the Polar bears, and finally how they affect the animals reproduction, with reproductive hormones and genitals in focus. The animals are exposed to a cocktail effect which complicates the assessment of the chemicals impact on the reproduction. Studies show that the genitals can decrease in size or become malformed, sexual maturation can be affected and the reproductive hormones can be disturbed.

SAMMANFATTNINGIsbjörnen är mycket populär hos djurparksbesökare och en viktig symbol för klimathotet, trots detta finns fortfarande många frågetecken kring hur vi ger isbjörnar i djurparker hög välfärd. I litteraturen har vi länge talat om isbjörnar som solitära djur men trots detta låter vi dem ofta dela hägn med andra isbjörnar på djurparker. Det har observerats positiva effekter av grupphållning av isbjörnar, bland annat sänkt förekomst av stereotypa beteenden, men vi måste vidare utreda vilken påverkan det har på deras välfärd. Ytterligare problem för isbjörnar på djurparker är stereotypt vankande som har observerats hos flertalet karnivorer som i det vilda rör sig över stora områden eller hemytor. Syftet med denna studie var att titta på hur isbjörnarna på Orsa björnpark utnyttjar sitt hägn, vilka beteenden som kan observeras samt hur stor del av observationerna de spenderar tillsammans.

Functioning reproductive organs are essential for the survival of a species. The reproductive system is very sensitive to exposure of chemical substances of anthropogenic origin. Humans release great amounts of chemical substances to the environment by our means of life and these substances have been proved to have a negative effect on the reproductive ability of different vertebral classes. In the polar bear (Ursus maritimus) a declined reproductive ability as an effect of decreased testosterone levels and decreased testicular size has been connected to the presence of high levels of organohalogenic compounds like PCBs. Although the Swedish brown bear (Ursus arctos) is not as carnivorous as its close relative the polar bear it is still exposed to environmental.

Examensarbetet Exteriört Designkoncept av Polar 560 för Soliferpolar AB är den avslutande delen på civilingenjörsprogrammet Teknisk Design vid Luleå tekniska universitet med inriktning industridesign. Examensarbetet är utfört under en projekttid på 20 veckor åt SoliferPolar AB. SoliferPolar AB är idag nordens största tillverkare av husvagnar. Platsen är Dorotea, där både SOLIFER och POLAR tillverkas. Arbetet syftar till att finna en tilltalande exteriör husvagnsdesign som skall öka marknadsandelarna för SoliferPolar AB genom ökad försäljning av POLAR.

Examensarbetet Exteriört Designkoncept av Polar 560 för Soliferpolar AB är den avslutande delen på civilingenjörsprogrammet Teknisk Design vid Luleå tekniska universitet med inriktning industridesign. Examensarbetet är utfört under en projekttid på 20 veckor åt SoliferPolar AB. SoliferPolar AB är idag nordens största tillverkare av husvagnar. Platsen är Dorotea, där både SOLIFER och POLAR tillverkas. Arbetet syftar till att finna en tilltalande exteriör husvagnsdesign som skall öka marknadsandelarna för SoliferPolar AB genom ökad försäljning av POLAR.

Detta är ett examensarbete på 15 högskolepoäng för avdelningen industriell design vid Luleå tekniska universitet och är genomfört under 10 veckor vintern 2007/2008. Uppdragsgivaren för arbetet är SoliferPolar AB som är en av Europas ledande tillverkare av åretrunthusvagnar. Projektet behandlar två modeller av Polarvagnen: Polar 560 CTH och Polar 620 TR. Uppdraget var att skapa en ny interiör för modellen Polar 620 TR med syfte att ge Polar inspiration för framtida inredningar. Arbetet innefattar också en djupgående kundundersökning på modellen Polar 560 CTH som har till syfte att ge SoliferPolar kännedom om kundernas åsikter på deras nuvarande inredning.

The brown bear population in Alberta, Canada has been decreasing, while the Swedish has been increasing and all the affecting parameters are not known. This study examined the difference in these populations to see if an explanation could be found in differences between the forest management. The aim of the paper was to see if stand treatments had an influence of brown bears habitat selection in autumn in Sweden and how the results can be used in Alberta. This was done by analyzing bear positions in Sweden with forest data, and comparing forest management data for the study area in Sweden with forest management data for Alberta. The results displayed that mature forests over 60 years that have been commercially thinned are selected by bears rather than forests over 60 years that have not been commercially thinned in.

As a hibernating species, the brown bear spend most of the winter months in a den as astrategy to avoid unfavorable conditions. The denning period is a vulnerable time for bears,making them unable to flee disturbances without losing valuable amounts of energy. Brownbears' wariness of humans and avoidance of anthropogenic disturbance often steer denningbears away from human infrastructure, and bears thereby avoid possible disturbance and itsassociated energetic costs. This study was carried out to test the hypothesis that bearsdenning closer to infrastructure select more covered den sites to compensate for the closedistance. Dens from 32 individuals were visited and analyzed in terms of sighting distance(a measurement for den horizontal cover) and habitat ruggedness, in relation to distances toinfrastructure.

The European Brown bear (Ursus arctos) has gone from basically being extinct in Sweden to, 2008 being estimated to a total of 3298 individuals. When looking at the new Swedish moose management system it is important to have an ecosystem-based approach and therefore include all the parts that moose impacts on and from in the management, especially the brown bear. Primarily in the spring and early summer the brown bear is a significant predator on moose calfs which must be taken into account in moose management. When the bear recolonize areas that it has previously been eradicated from, it will once again come in contact with people who are not accustomed to the bear's role in the ecosystem. We studied three groups of moose management areas with different predation by bears.

Tourism in the Arctic and Antarctic is increasing rapidly. In both Polar Regions, the cruise tourism is predominant. Several of the tour operators arrange trips under the banner of ecotourism, meaning that the trips should be ecologically sustainable. To ensure ecotourism standards there are different types of certifications; for cruise travels in the Arctic there is AECO (the Association of Arctic Expedition Cruise Operators) certification, and for travels to the Antarctic IAATO (the International Association of Antarctic Tour Operators). Promoters of ecotourism argue that these trips are important because they create support for conservation work among tourists making them ?polar ambassadors?.

Soapnuts have been used as a cleaning detergent and medicine since ancient times in different parts of Asia. Today soapnuts are sold as an environmentally friendly alternative to common washing detergents. The aim of this literary study is to give an answer to what it is in the soapnuts that makes them work as a washing detergent. The active component belongs to a group of components called saponins which are secondary metabolites with the purpose to protect the tree from pathogen attacks. Saponins are widely spread in the vegetable kingdom and some of the families and species are so rich in saponins that their names are influenced by this, for example Sapnindaceae and Sapindus which are mentioned in the beginning of this literary study.

The purpose of this work was that with the help of a literature review have a single document with information on how the various species: brown bear (Ursus arctos), lynx (Lynx lynx) and the wolf (Canis lupus) living in the wild. The aim was also to show which stereotypic behaviours these different species have in zoos and the enrichments that is already being used and to make suggestions and recommendations on enrichment based on animal behaviour ecology. In zoos, some species thrive well while others have propositions to propagating problems, poor health and stereotypic behaviors. The brown bear, lynx and wolf, live both in the wild and in zoos in Sweden. As these animals have different ways of living in the wild, it is important to accommodate to each species, the way they are kept in zoos in accordance with their behavioural ecology.Brown bears are omnivorous and solitary living species with large energy needs so that they spend most of their day to actively feeding but also rest.

Med förskoleklassen i centrum är syftet att få utökade kunskaper kring matematiksvårigheter samt vilken betydelse självkänslan kan ha för matematiklärande. Studien är baserad på kvalitativa intervjuer byggt på Diamant samt en observation med materialet The Bears kopplat till testet. Tidigare studier tillsammans med vår empiriska undersökning visar att matematikkunskap och självkänsla har ett samband och att de båda kan påverkas av undervisningens upplägg. I studien framkommer det att diagnoser och observationer samt lärarens roll är betydelsefulla pedagogiska redskap, både för självkänsla och matematikkunskaper..

Inger Edelfeldt (1956) and Bengt Martin (1933-2010) are two Swedish writers of different generations. Both of them did, between the years 1968 to 1983, write about adolescent men coming to terms with their homosexuality. Edelfeldt wrote two versions of the same story, with slight but significant differences, the main being different implied readers (adult versus adolescent). Bengt Martin wrote about three young homosexual characters: Joakim, Bengt and Bengt. The story about Joakim is presented as fiction but bears many resemblances with Martin?s autobiography.

Syftet med studien var att reliabilitet- och validitets testa en nyutvecklad mätutrustning för hjärtfrekvens registrering. Åtta manliga hockeyspelare med medelålder på 21,9 år med variation från 18 år till 31 år deltog. Två maximala ergometercykeltest genomfördes på en Ergoline er 800S ergometercykel med en till två dagars mellanrum. Registrering av hjärtfrekvens skedde kontinuerlig med hjälp av två olika hjärtfrekvensmätare, en nyutvecklad mätutrustning för hjärtfrekvens registrering via trådlös seriell länk (HTL) samt Polar hjärtfrekvensmätare (PH). Jämförelse gjordes mellan de båda mätutrustningarna och testtillfällena på individnivå samt gruppnivå.