St. John?s wort extract is composed of a large number of components, about 150, but the most studied and interesting substance are hyperforin and hypericin. The herb is very popular and it is known for its pharmacological efficacy in numerous disorders. It is used for treatment of mild to moderated depression as an alternative to synthetic antidepressants.

I en hårt konkurrensutsatt internationell marknad som kretskortstillverkning gäller det att vara effektiv. Därför tog ledningen för Ericsson Katrineholm under år 2005 beslut att Lean Production skulle införas i verksamheten. Den ökade fokuseringen på produktivitet ledde till att flera problem kopplat till ytmonteringslinorna på avdelningen Module Production & Engineering identifierades. Avdelningen fann att ställarbetet mellan olika produkttyper genererade onödigt långa produktionsstopp som i sin tur begränsade avdelningens möjlighet att minska batchstorlekarna. Syftet med examensarbetet har därför varit att reducera ställtiden mellan olika produkttyper vid ytmonteringslinan för volymproduktion. Detta ska i sin tur nås genom att framställa och implementera ett antal förbättringsförslag. Arbetet har i huvudsak varit av kvalitativ art, med kvantitativa inslag som underlag för ABC-klassificeringen samt uppföljning och tolkning av den genomsnittliga ställtidens utveckling under år 2006. Analysen har genomförts i enighet med SMED-metodik där internt och externt ställarbete vid ytmonteringen först kartlagts innan ett antal förslag lagt fram för att förbättra de olika aspekterna av ställarbete.

SUMMARYInventory of raw materials holds an important role in companies within the manufacturingsector. The inventory works as a buffer that secure the supply of materials to the productionunit. The aim of the inventory is to ensure that the company is able to meet the customers?demands despite fluctuations and variations in the material flow. The size of the warehouseand the layout are physical limitations for the quantity of articles that can be stored.

SUMMARYInventory of raw materials holds an important role in companies within the manufacturingsector. The inventory works as a buffer that secure the supply of materials to the productionunit. The aim of the inventory is to ensure that the company is able to meet the customers?demands despite fluctuations and variations in the material flow. The size of the warehouseand the layout are physical limitations for the quantity of articles that can be stored.

Bioethanol is one alternative energy fuel that can be produced from different types of biomass. Second generation bioethanol comes from fermentation of lignocellulosic material and can be seen as a more environmental friendly alternative as e.g. forest residues and agricultural by-products are used. To be able to use lignocellulosic biomass in ethanol production, it has to be subjected to different treatments first. In this study, aspen sawdust was used as lignocellulosic material.

During the last couple of years leaf-edge-cuts, typical to Otiorhynchus wingless-weevils, have been discovered on ornamental shrubs, especially Syringa vulgaris lilac and Ligustrum vulgare privet. These plant species have not earlier been attacked by wingless-weevils and because of that, the aim of this study is to see if new species of weevils have been established in Sweden or if the domestic weevils have changed their food preferences. This work also includes a literature study of known weevil species in Sweden and their host plants, and of wingless-weevil species in Europe that could be invasive here. Locations, where damage to previously named plants has been reported, have been examined. The extension and appearances of the damages have been documented in order to study if different weevil species make different types of edge-cuts.

Syftet med studien är att öka vår förståelse för hur slöserier påverkar ett internt material och produktionsflöde i en producerande verksamhet, för att kunna ge förslag på effektiviseringar av denna process. Studien är utförd på företaget Växjöfabriken Produktions AB som är beläget i Växjö och utför skärande bearbetning på gjutgods. Efter att ha studerat befintliga teorier skapade vi vår teoretiska utgångspunkt med det urval av teorier som vi ansåg vara viktiga för studien. Från dessa genererade vi en analysmodell som sedan låg till grund för det fortsatta arbetet. Analysmodellen gav ett strukturerat arbetssätt för att samla in empirisk fakta från företaget som vi sedan använde för att göra en analyserande jämförelse med vår teoretiska utgångspunkt.

The number of inhabitants of the towns and city centers have generelly increased, concurrent as the population in smaller towns has decreased. In Stockholm, the migration is very fast and here is also the most populous place, if one compares with other Sweden. In order to respond to the increasing population and the pressure they put on city spaces has Stockholm's town a town building strategy that says "build inwards". It means that one stem seals the town with spaces and business activities in central locations. The increased population in the towns and the densification of buildings leads however to an increased pressure on parks and public places.

Phosphorus (P) is an essential nutrient but a surplus could lead to eutrophication. Furthermore, the minerals used to produce the mineral phosphate is a non renewable resource. There are in other words several reasons to reduce the leakage of P and the agriculture is one important area to attend. The aim of this work has been to investigate if carbon-rich arable soils content contain more P than arable soils with low carbon content. Moreover it has been calculated if the carbon-rich soils could pose a risk of P leakage by comparing their delivery of P with the plant uptake. The work has consisted of compiling the results from former gathered and analysed soil samples of 130 Swedish arable soils. The fractions of P considered are water soluble P (Pw), ammonium lactate-extractable P (P-AL), hydrochloric acid-soluble P (P-HCl), organic ammonium lactate-extractable P (Porg-AL) and inorganic ammonium lactate-extractable P (Porg-HCl).

The preschool constitutes a big part of many children's everyday existence. Its contents are therefore of great importance and the environment deserves a well thoughtout design. In this study, surveys in field and literature have resulted in conclusions around how plants can be used in children's play environments, in order to contribute to the experiencerelated values. The aim is to present conclusions to lean on when drawing up designproposals for new playgrounds, especially where the natural conditions are not so favorable. The first question that is responded to is how plants can be used in order to enrich the children's play environments.

Open ecosystems, such as grasslands and pastures, have naturally been shaped by disturbances like fire and grazing. These processes play a crucial role in creating habitats with high biological diversity, particularly favourable for a wide range of herbaceous plant species. In recent years, many of these disturbances have ceased, leading to encroachment, fragmentation and habitat loss. The aim of this study was to examine and compare the effects of fire, herbivory and a combination of fire and herbivory on the emergence of herbaceous plants. The study was conducted at the Ecopark at Nordens Ark.

The most common way to treat wastewater in Sweden today is by a combination of an activated sludge process and a chemical treatment. These processes are not very energy efficient and may not be the most environmentally friendly. That is why it is interesting to evaluate new alternative methods to see if they can be less harmful to the environment and help to a lower resource consumption. New techniques are tested in a pilot installation at Hammarby Sjöstad, Sjöstadsverket. To be able to evaluate these techniques in a wide perspective system analyses are conducted where different impacts can be considered, advantages and disadvantages in the systems.Five system structures for water treatment have been constructed in Matlab/Simulink in this study.

A plant's defensive ability against herbivore attack can be influenced by many different factors, one of them being domestication. During human selection to improve the yield of plants, the resistance against herbivore attack can have been lowered, due to a trade-off for use of resources between these traits in the plants. In this thesis I investigated the effect of domestication on resistance against herbivorous insects in cotton plants. I used different varieties and species of wild and domesticated cotton in three different experiments. A feeding assay was conducted, the mortality, development time and pupal weight of larvae of the Egyptian cotton leaf worm Spodoptera littoralis was studied. In a second experiment the preference of the root-feeding beetle Agriotes spp.

In conventional viscose manufacturing, a large amount of carbondisulfide is consumed. This amount has to be decreased to keep the production cost down and to reduce the environmental impact. The purpose with this work was to show if an enzyme treatment of a dissolving pulp could increase the degree of substitution in the viscose so that the amount of carbon disulfide consumed in the process could be decreased. Previous investigations by Kvarnlöf (2007), Engström et.al. (2006) and Henriksson et.al.

This study was based on measurements of growth and shape of 50 clones of wild cherry, Prunus avium L, in south Sweden and aimed at finding out wether or not any of these clones are useful for commercial propagation. Initially, a short assembly of documented knowledge concerning wild cherry as a timber producing tree species was put together. The study of the 50 clones includes information gathered during the fall of 2006 from four trials located in the counties of Blekinge, Småland and Västergöland. The oldest trial, founded in Tranemåla, Blekinge, in 1992, was focused on offspring and aimed at discerning differences between provenances and at developing an adapted plant material. The other experiments were both clone trials and founded in 2002. These are based on 50 individuals selected from the offspring trial in Tranemåla.