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534 Uppsatser om Stone forming substances - Sida 25 av 36
Utlakning av tungmetaller från Skörby deponi
The purpose of this thesis has been to assess whether leaching from one particular Swedishlandfill site, Skörbytippen, is contributing to elevated levels of heavy metals in a ditch runningfrom the landfill site to the lake Mälaren in the communal region of Håbo kommun. Since theditch is stretching approximately five km downstream from the landfill site, in situ observationsand maps with known points of inflow was utilized to determine appropriate test points for thecollection of samples.Soil, water and sediment samples were collected and analyzed for content of organic material, pHand conductivity. Data on plant-available elements and total amounts of heavy metals wasacquired through ICP-analysis.The results show that the Skörby landfill is currently in the methane-forming anaerobedevelopment phase, which indicates that the concentration of free and complex-bound metals inthe leachate water should be low due to chemical binding with other landfill compounds. The pHof the sediment samples was generally one unit higher than the soil samples and some of themeasured data, such as pH and conductivity, show that an environmentally disturbing dischargeof some kind of strongly alkaline chemical(s) has been made from Benders? takpanneindustri inclose proximity to the landfill.
Grodsamhällen längs vattendrag på Borneo : En identifiering av habitatkaraktärer viktiga för diversitet och abundans av grodor i tropisk regnskog
The stretch from the riparian zone of a major river, through the mouth and upstream in tributaries forms a range of differing habitats. The aim of this study was to investigate the effect of these different habitats on the riparian frog community in primary rain forest in Borneo; i.e. examine whether any gradients could be demonstrated in terms of species composition, diversity and density of frogs, as well as which environmental characteristics that seem to be of most importance in forming habitats of high conservational value. A major river, Segama, and three of its tributaries were investigated. The surveys were carried out at night by searching for frogs visually and acoustically along the streams, from the shore of the Segama river and 400 metres upstream in the tributaries.
Den gyllene medelvägen: en diskussion kring unga invandrares erfarenheter av mötet mellan ursprunglig och svensk kultur och hur detta har påverkat valet av identitet
The purpose of this study was to discuss young immigrant's experiences of the meeting between their original culture and swedish culture. In this discussion certain emphasis is laid on the formation of identity. In a more specific manner the aim was to find out which underlying circumstances contributed to the individuals choice in considering him- or herself as swedish or not and what these circumstances depended on.The empirical material of this study consists of five lifestories based on the methodological study of narrative. I have analyzed the material with help from Anthony Giddens' theory of structuration with starting point in the conception of ontological safety. I identified four different themes that frequently recured in each lifestory: identity in migration- and integrationsprocesses, the open doors of globalization, "swedish" identity and belonging in two cultures.
Framtidens stadsträd för en fungerande grönstruktur
The effect of climate change places demands on how we build cities. Cities have to be built denser to meet the objectives of sustainability but as a result of this densification city green areas are at risk of exploitationand disappearing. The question this raises is whether there has to be an opposition between a dense and a green city?Urban trees are playing a very important role in cities. They stand as the major part of the vegetation in citieswhich are otherwise dominated with concrete and stone.
Antinutritionella substanser iåkerböna, ärter och blålupin vidutfodring till mjölkkor
There is a shortage of locally produced high quality protein concentrates in Europe andSweden. Local production would decrease the dependency on imported soybean and meet thedemand for organically grown feedstuff from ecological dairy farmers. Field bean (Viciafaba), peas (Pisum sativum) and sweet lupin (Lupinus angustifolius) are good alternatives tosoybean, but contain anti-nutritional substances (ANS) that could reduce their use as proteinconcentrates in dairy cow diets. The aim of this literature study was to review which ANSfield bean, peas and sweet lupin contain and whether they affect dairy cows negatively.Trypsin inhibitors and Chymotrypsin inhibitors (TI) were present in all three crops. TI couldbecome inactivated and degraded in the rumen, but due to the high passage speed of thedigesta, most TI left the rumen in an active state.
Kulturen med en twist : En studie av fyra lokaler från trattbägarkulturen på Gotland.
This thesis analyses the Funnel Beaker Culture on the island of Gotland. Since no comprehensive studies of the remains of the pottery have been made, this is one of the reasons why I chose to study this topic. The purpose of this study is to analyze the pottery and to discuss the chronological and spatial implications. Four sites from the Funnel Beaker Culture on Gotland are studied; Mölner/Gullarve, Gräne, Ardags and Suderkvie. Ceramic samples are analyzed with respect to its ornament and it is discussed if the pottery found at various sites are contemporary.
Hårdfräsning i verktygsstål : Förslitning av skäregg
This thesis work is made by Torbjörn Johansson on Karlstad University for Uddeholms AB. The assignment in this thesis work was to investigate tough cutting in three different tool steels: Vanadis 4 Extra, Vancron 40 and Sverker 21. The research was to compare the wear of the tool after cutting in each one of the tool steel alloys. The research was also made to see if the tool cutting in Vancron 40 has a better wear than the tool cutting in Vanadis 4 Extra and also compare the results with Sverker 21. All three of these alloys are a part of Uddeholms AB:s range of products, and is used in applications like forming tools and knife tools. Vancron 40 is a powder steel with a very good combination of mechanical properties like ductility, adhesive strength and hardness.
V?rt st?rre f?dernesland ? Paneuropa i Tidevarvet och svensk debatt 1924?1936
This is a reception study on how the idea of Paneuropa, as launched by the austrian count Richard Nikolaus Coudenhove-Kalergi in 1923, was received by the political weekly magazine Tidevarvet, a product of ? and an opinion forming organ for ? the social liberal wing of the Swedish suffrage- and peace movements. The main purpose is to examine to what extent there was an existent Europeanism in the public debate in Sweden during the interwar period, and how that discourse was constructed through the conceptual pairings disruption/unity and parts/whole. The study is conducted mainly through discourse analysis, combined with partly new research into sources such as the parliament, the newspapers and civil society to try to initiate a mapping over the wider reception of the Paneuropa project in a Swedish context. The study finds that the subject of Paneuropa is present throughout the almost entire period of the publication, namely 1924?1936, and that the question of a federal Europe is closely connected to the pacifist attitude of the editorial staff in general and writer/editor Elin W?gner in particular.
Bild och begrepp : Heideggers läsning av Kant ur ett fenomenologiskt perspektiv
This thesis explores some key aspects of early Heidegger?s interpretations of Kant from a phenomenological perspective. In general terms, it analyzes Heidegger?s claim that Kant?s faculties share a common root in the transcendental imagination, as a critical development of motives found in Husserl?s phenomenology.More precisely, the thesis argues that the motive for deriving Kant?s first faculty, intuition, from the synthesis of imagination can be understood as an attempt to account for the receptivity of a finite subject, without yielding to a causal description of sensibility. Phenomenology shares this problem with Kant?s critical philosophy.
Vill du vara med?: En studie av Piteåpanelen och dess inverkan på Piteå kommuns miljöpolitik
The representative democracy has become weakened during the last decades. At the same time the United Nations declared at the Rio de Janeiro meeting in 1992 that environmental problems can best be solved by involvement of all concerned citizens in decision-making. The main purpose of this study has been to examine if citizens panels is a possible way to involve citizens in environmental decision-making and what the outcomes can be. Furthermore the study has investigated what the participation has contributed to environmental politics and how representative the results have been. This has been carried out by investigating the Piteåpanel in the municipality of Piteå by conducting interviews.The result of the study shows that the involvement of the citizens in the decision-making influenced the environmental politics of the municipality.
Det energisnåla isoleringsmaterialet
This bachelor essay is divided into two parts, the first being a construction of a single-familyhouse and the second an in-depth study of five different isolation materials, analysed from anenergy perspective.The first part, the construction of the single-family house, has been created from knowledgeacquired during three years of studying at KTH Royal institute of Technology in Stockholm, inthe program Architecture and the Built Environment. The constructed house is a one-floorhouse of 137m2with façade plaster, situated in Borlänge, Sweden. The house has a wooden framewhich is built on a on sight cast concrete foundation, on the ground. The house?s roof is a gableroof, which has an angle of 24 degrees.
Vallört som växtnäringskälla : växtnäringsförsök och litteraturstudie
Russian comfrey, Symphytum x uplandicum, was tested as a plant nutrient source in a trial with tomatoes. Comfrey liquid was produced by Stiftelsen Holma i Höör. Tomato plants of the cultivar Aromata planted in a medium of soil:peat (1:1) enriched with organic nutrients and lime, were fed with comfrey liquid plus Biofer, in three different concentrations. Two different concentrations of BioRika were used as comparison, along with an unfertilized control group. In the comfrey treatment I a total amont of 1g N, 0,23 g P, 0,84 g K, was given to the tomatoes.
Bemötande : En observationsstudie om hur flickor och pojkar bemöts i förskoleåldern
The aim of this study is to examine metaphors and what may be perceived as motif-circuits in Stig Dagerman?s play Den dödsdömde (The Man Condemned to Death) and the two short stories ?Den dödsdömde? (The Man Condemned to Death) and ?Mannen från Milesia? (The Man from Milesia). My intention is to discuss a single theme and identity-marks that unites all three works, using Paul Ricoeur?s The Rule of Metaphor (La mêtaphore vive) as well as the ?thematic critique? of Jean-Pierre Richard.What is metaphor for Ricoeur is for Richard themes (theme): an organizing principle, a sort of schedule around which a world is constituted. Hence, I find similarities between the motif-circuits, Ricoeur?s metaphor-theory and Richards?s themes.
Goliatmusseron (Tricholoma matsutake) - kräver den en kontinuitet av träd? :
Modern forestry management may disadvantage some mykorrhiza forming fungi because; they are dependent on late successions and cannot survive the constantly recurring breaks in the continuity of their host tree. For this study the specie goliatmusseron (Tricholoma matsutake) was chosen to investigate this possibility. In Sweden T. matsutake is found in greatest amounts north of Örnsköldsvik on glacifluvial sandy soils in association with pine trees and reindeer lichens.
Seventy two forest stands where the specie previously had been found were studied; 62 in the northern part of Sweden and ten in the southern. Several indicators were studied to find out if these stands have had a continuity of living trees.
Armaturfamilj med LED som ljuskälla
This report describes a project, which was carried out as a final thesis covering 30 ECTS during the final semester of the Master of Science programme Industrial Design. The assignment was issued by Fagerhults Belysning AB in Habo. The assignment was to design a family of products in which LED was to be used as a source of light. The main focus in the initial part of the project was to find a way to design the inside of armature which was suitable for LED technology. An armature, already in the range of products at Fagerhult, with the desired qualities that was to be strived after was the Zintra. The lighting source of the Zintra is a compact fluorescent lamp.