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329 Uppsatser om Wetland for nitrogen retention - Sida 19 av 22
Nutrient effects on microorganism communities in nutrient poor soils
Better, more efficient fertilizers with great productivity and economic returns are needed, but it is important today to find fertilizers that are also sustainable. It is also important to carefully monitor their impact on the environment, including potential side-effects. In this context, the microbial communities that carry out numerous essential functions contributing to a functional ecosystem are of particular interest.
The present study is a complement to a pot experiment that investigated the potential of different waste products for use as fertilizers and how they affect the microbial community. In the pot experiment, the clearest treatment change in microorganism community function was found in the fully fertilized treatment used as a positive control. The question was whether this was indirect, i.e.
Förfogandeförbudets framtid. Förutsättningar för, och eventuella konsekvenser av, ett avskaffande av kravet på förfogandeförbud vid användning av återtagandeförbehåll.
In order for a retention of title clause (ROT-clause) to be valid against third parties underSwedish law, the debtor must be prohibited to dispose of the object transferred. Forinstance, the debtor must not be allowed to resell the object without the creditor?spermission or before the object has been fully paid. If the creditor gives consent to thedebtor?s disposal, he loses his right of separation.
Naturhänsyn på certifierade privata skogsfastigheter : en jämförelse i praktiken mellan FSC och PEFC i Sydsverige
Nature conservation on certified small private forest owners- a comparison
between the two certification systems FSC and PEFC in southern Sweden
Today two different certification systems are used in Sweden to certify forest, FSC (Forest Stewardship Council) and PEFC (Pan European Forest Certification). During the last years certification of forests in general and different certification systems have frequently been debated. FSC is a globally widespread system and about 10 million ha out of 23 million ha Swedish forest is FSC-certified. The FSC-standard is mainly used by major forest companies and to some extent also by smaller private forest owners. PEFC is a European system and about 2 million ha Swedish forests is PEFC-certified today.
Attityder till implementering av precisionsodlingsteknik :
Different techniques for precision agriculture have been available during the last decade.
Some of them are more widely used than others. The main purpose of this thesis was to
investigate the different attitudes to precision agriculture that exists among farmers and
advisors in Sweden.
Eight advisors and sixteen farmers were asked for their opinion of a number of specific
techniques for precision agriculture, such as yield-mapping, precision liming, the Yara
Nitrogen Sensor and site-specific fertilization with phosphorous and potassium. They were
also asked to describe the way in which the counselling in Swedish agriculture is used and
also about it's importance for the adaptation of new techniques.
The high costs are mentioned to be one of the most important reasons why precision
agriculture hasn't been more widely spread. Several farmers refer to their farms as too small to bear the costs that come with the techniques. The individual interest for technique among the potential users plays an important role.
Kaliumgödsling på torvmark - effekt på tillväxten hos planterade granar (Picea abies)
Peat lands are a great potential resource for increased forest growth in Sweden, there are approximately 6.5 million hectares of peat lands, whereof around 70% produce less wood than one m3sk/ha and year and are therefore classed as forest waste land. There are over 200 000 hectares of peat land that is already drained and wooded, and that may be suitable for fertilization. Forest production on peat soils usually requires drainage and fertilization. Dewatering requires ditching the area, so that the roots can have access to oxygen. Nitrogen is often abundant in the peat but other nutrients; especially potassium is in short supply. The purpose of this work was to examine the effects of potassium fertilization on the growth of spruces that were planted on drained peat land and how different amount of fertilizers affects the growth. Potassium deficiency is strongly growth inhibiting, since potassium is important for substance transport in the tree. Potassium is also important for the carbohydrate formation, and because increasing the sugar content of the cells constitutes a lower freezing temperature does potassium availability in the soil play a major role in the winter resistance of many species. Potassium is not found in any organic compounds in the tree, but is present in cell and tissue fluids. A fertilization trial was started in 1978 in Siljansfors Experimental Forest. The plots in the experiment were fertilized with different amounts of potassium and one plot was left without fertilization. All plots that were fertilized with potassium grew considerably better than the unfertilized plot. The difference in production between the unfertilized plot and the plot that received the most potassium was 7.2 m3sk/ha and year. The unfertilized plot can still be classified as waste land. The theoretical production capacity was estimated using a Swedish system for site quality estimation of wetlands after ditching (dikningsbonitering). The plot with most potassium produced after fertilizationaproximately in level with theoretical estimations. Key words: Peat land, Fertilization, Ditching, Growth, site quality..
Kokosvatten och återhämtning/ vätskebalans efter fysisk träning - En systematisk översiktsartikel
Sahlgrenska Academyat University of GothenburgDepartment of Internal Medicine and Clinical NutritionAbstractTitle: Coconut water and recovery/water-electrolyte balance after physicalexcercise ? A systematic overviewAuthor: Irene Eriksson and Alexandra ÖquistSupervisor: Henriette PhilipsonExaminer: Frode SlindeProgramme: Dietician study programme, 180/240 ECTSType of paper: Examination paper, 15 hpDate: April 09, 2014Background: During physical exercise, it is common with dehydration, which affectsperformance negatively. To restore the fluid balance it is optimal to drink fluids containingsalt and carbohydrates. In theory, coconut water should be a good recovery drink because oftheir nutrient content.Objective: To evaluate the scientific evidence available, to investigate whether coconut wateris better than water or sports drinks for rehydration after physical exercise.Search strategy: PubMed, Scopus and Cochrane Library have been used in the literarysearch. Keywords used were recovery, fluid balance, fluid therapy, water-electrolyte balance,rehydration, dehydration, hydration, exercise, physical activity, resistance training, activity,sports, training, coconut water in varying combinations, in order to cover as wide area aspossible.
Käppalaverkets nuvarande och framtida rötningskapacitet : en studie i labskala
Käppala wastewater treatment plant situated on the island of Lidingö northeast of Stockholm is running a project during 2004 and 2005 with the purpose to map out the capacity of anaerobic digestion in the digesters that treat primary and excess sludge. The purpose of this thesis work, which is part of that project, was to characterize the present anaerobic digestion process and to investigate its capacity to treat other organic wastes such as restaurant waste and waste from water works. To decide the potential of both methane and biogas production from different substrates batch laboratory tests were carried out. To imitate the anaerobic digestion process at Käppala continuous tests with small scale reactors were carried out. These reactors were later fed with restaurant waste.The batch laboratory tests showed that primary sludge had a potential biogas and methane production of 0,62 and 0,35 Ndm3/g VS respectively after 40 days of digestion.
Lojalitetsprogram ur medlemmarnas perspektiv. : Skapas lojalitet eller tröghet?
As the usage of loyalty programs increases, this study takes a new approach to examine how these programs influence consumers? attitudes toward brands. This paper is influenced by the recent findings that question the capability to create a clear picture of the effects of loyalty programs by conducting quantitative research. This is based of the differentiation between attitudes and actions, leading to the fact that quantitative research have only captured the actions of members of loyalty programs. In contrast to that, this paper uses qualitative interviews to create a more in-depth point of view.The paper immerses the reader in the theoretical viewings of what loyalty is and how it emerges from satisfaction.
The legacy of the mill : a metal polluted forest soil in Gusum
Soils in a metal contaminated site on Stångberget in Gusum in southeastSweden were investigated and compared to relatively unaffected soils a fewkilometres away. Pollution came from historical release of untreated flue gasesfrom a brass mill. The objective was to find information on how high the metalconcentrations are, if metals from the polluted soil affect the surroundings andif the metal contamination affects the microbial community. The soil wasinvestigated using several different methods, such as field XRF measurements,chemical analysis of metal, carbon and nitrogen content, pH, acid neutralizingcapacity, texture, soil depth, field leach tests, sequential extraction and microbialfunctional profiles. The study showed that copper and zinc concentrationswere above Swedish Environmental Protection Agency guidelines for lesssensitive land use on the entire investigated area.
Potatisens specifika vikt och kokegenskaper med hänsyn till odlingsplats och sort :
The boiling properties are an important quality issue of the potato. In order to obtain adequate boiling properties the growth of the potato needs to be controlled and interrupted at the right time. However, it is difficult to determine when to stop the growth. Specific gravity can easily be measured and can sometimes be used as a tool for estimating the boiling properties.
This report discusses different aspects of the specific gravity of the potato and how it can be used as a tool to determine the appropriate time for vine killing.
Potatisens specifika vikt och kokegenskaper med hänsyn till odlingsplats och sort :
The boiling properties are an important quality issue of the potato. In order to obtain adequate boiling properties the growth of the potato needs to be controlled and interrupted at the right time. However, it is difficult to determine when to stop the growth. Specific gravity can easily be measured and can sometimes be used as a tool for estimating the boiling properties.
This report discusses different aspects of the specific gravity of the potato and how it can be used as a tool to determine the appropriate time for vine killing.
Franchisee-based brand equity inom fastighetsmäklarbranschen : Varumärkets värde för franchisetagare
Titel: Franchisee-based brand equity inom fastighetsmäklarbranschen ? Varumärkets värde för franchisetagare Nivå: C-uppsats i ämnet företagsekonomiFörfattare: Ebba Granberg, Malin BloomHandledare: Jonas KågströmDatum: 2015 - majSyfte: Syftet med denna studie är att analysera vilka källor franchisetagare påverkas av i skapandet av FBBE inom tjänsteföretag. Detta med avseende på vilken betydelse varumärket har i franchisekonceptet och huruvida detta påverkar franchisetagarens intentioner att ingå i ett franchiseavtal samt bibehålla franchiserelationen.Metod: Då syftet med studien är att analysera franchisetagarens påverkan av FBBE, har således studien genomförts med en kvalitativ forskningsansats. Semi-strukturerade intervjuer har utförts med 12 franchisetagare inom fastighetsmäklarbranschen, vilka alla arbetar i Stockholmsområdet. Materialet har därefter analyserats med hjälp av dataanalysprogrammet Nvivo10 och presenterats tillsammans med resultaten för studien.Resultat & slutsats: Studien introducerar en ny modell över FBBE inom den svenska fastighetsmäklarbranschen.Förslag till fortsatt forskning: Denna studie är avgränsad till ett specifikt geografiskt område och det kan därför vara av intresse att upprepa en liknande studien inom samma bransch, men i ett annat geografiskt område.
Resurseffektiv kvävereduktion genom nitritation
Resurseffektiv kvävereduktion genom nitritationProblematiken med övergödning i våra akvatiska system har lett till hårdare krav på kväverening vid våra reningsverk. En rejektvattenbehandling har visat sig vara ett bra alternativ för att utöka kvävereningen. Vid Nykvarnsverket i Linköping renas avloppsvatten och sedan 2009 finns en SHARON-anläggning i drift. SHARON står för ?Stable High rate Ammonia Removal Over Nitrite? och är en kvävereningsprocess för rejektvatten utvecklad av Grontmij i samarbete med Tekniska universitetet i Delft.I denna studie har SHARON-processen i Linköping undersökts.
Konstruktion av en fotobioreaktor för odling av alger : ett småskaligt försök
The prevailing food and energy crisis of the world, due to the declining reserves of fossil energy and a never ending rise of consumption, forces us to look into new fields to supply our energy demand. The boom of bio energy is criticized, as food crops are used to provide biodiesel and ethanol and the volumes are ridiculously small to supply world demand. Algae are one of the world?s oldest life forms and exist in many different phyla, providing a great variety to choose from, for different purposes. Cultivating microalgae offer a way to produce energy at great volumes without competing with food production and at the same time the algae offer a way to use our expensive nutrients in a more efficient way, besides this the algae are carbon dioxide neutral since their carbon source can be supplied by the atmosphere and the additional energy required can be supplied by algal oil or other renewable sources.
Biogaspotential vid samrötningav mikroalger och blandslam från Västerås kommunala reningsverk
Because of the increasing trends in energy consumption and increased environmental awareness, greater focus has been placed on improvement and development of renewable energy sources. An already proven and accepted method is biogas production from anaerobic digestion at municipal wastewater treatment plants.In the waste water treatment process solid material and dissolved pollutants are separated from the water, forming a sludge. The sludge is separated from the process and stabilized during anaerobic digestion or aerobic aeration. Most often, mesophilic anaerobic digestion is used. Because of degradation by microorganisms, biogas with a high content of methane is formed during the digestion.