Samhällets behov av naturvetenskapliga problemlösningar när de rör kemin ökar mer och mer, men ungdomars kunskaper och intresse för kemi har minskat det sista decenniet. Den kemididaktiska forskningen pekar ofta på brister och även om lärarens praktik har en avgörande betydelse för elevernas lärande är det väldigt lite av lärarens praktiska undervisnings metoder som kommer till tals. Syftet med denna studie är att sammanställa och lyfta fram det positiva i det praktiska arbetssättet som några yrkesverksamma lärare använder sig av för att uppfylla något eller delar av kursmålen i kemi för årskurs 5. Resultatet kan förhoppningsvis användas för att få fler lärare att våga undervisa i kemi i grundskolans tidigare år. Studien genomfördes genom djupintervjuer.Genom att välja en flexibel undervisning där elevernas intresse och förmåga var i fokus kunde lärarna genomföra en undervisning som bidrog till att delar av de beskrivna målen skulle kunna uppfyllas.

Platelet aggregation is a major and common problem in blood samples from cats. This greatly affects the accuracy of counting of the platelets. Because of the difficulties in counting feline platelets, results for patients and reliable reference values for cat platelets are currently so inaccurate as to be almost useless in diagnosis of thrombocytopenia. In this study we used an effective method to prevent platelet aggregation. Blood was collected in CTAD test tubes and prostaglandin E1 was added to the blood sample.

Every year a number of tenant-owner flat deals are concluded and the availability of real estate agents on the market is today very widespread. It has become increasingly difficult for estate agents to distinguish themselves in a way that makes the estate agent the customer?s choice. Estate agents must have a good understanding of what is important to the customer. An apartment deal is, for most people, an important event in their life.

During a fire large amounts of particles and unhealthy agents occur.  Polyaromatic hydrocarbons (PAH) and toxic metals are examples among many others. These agents have a capacity to bond to particles and when the fire is extinguished, the particles can be transferred with the extinguish water into the soil and to the groundwater.Recent studies in particles have been conducted. A study by Ulrika Iverfelt (2014) reviled that the particles from a fire contained large amounts of both PAH and metals, which is consistent with earlier analyses. Her column experiments with particles in the size ? 11 microns and ?100 microns in silica sand, reviled that the larger particles was immobilized because the transportation was influenced by sieving or physiochemical particle and surface interactions.The transport of the particles in soil and groundwater is regulated by two main mechanisms: physiochemical surface interactions and straining.

In this study I have brought up what pupils within vocational training, with focus on upper-secondary school have apprehended about the course ?Projektarbete 100 p? (Project job 100 point). In my analysis I interviewed twelve pupils from upper-secondary school who had 20 % or more truancy during their three years of studying in upper-secondary school and achieved a result to these pupils had problems with absenteeism then primary school. The pupils agreed about the school?s existence but they need schools of practical type.

Både internationellt och nationellt sett har elevers kunskaper i naturvetenskap försämrats enligt PISA-undersökningarna. Vi har även ute i verksamheten uppmärksammat en brist på kemiundervisning i de lägre åldrarna. Syftet med studien är att bidra med kunskap om ett vardagsnära och experimentellt arbetssätt och synlig- göra det naturvetenskapliga språkets betydelse för yngre elevers kunskapsutveckling i kemi. Studien utfördes som en aktionsforskning vilket innebär att en kunskapsbas skapas om sin egen praktik för att sedan genomföra en forskning som leder till en förändring. Aktionerna vi utförde bestod av två experiment med tillhörande för- och efterarbete.

The eutrophication of lakes and seas with the algal bloom and deficiency inoxygen that follow, has been given priority by the Swedish government as oneof 16 environmental objectives. The purpose of this project was to develop a toolbased on a simple model, limited amount of data and geographic informationsystem (GIS) to identify areas with risk for phosphorus losses due to surfacerunoff. This tool can act as a decision support to decide where appropriatemeasures should be applied with the aim of reducing phosphorus losses and bythat the eutrophication.The method that has been used is a combination of two models, one calculatingthe potential erosion while the other one identifies areas of erosion (net erosion)or deposition. This ability is of great importance because potential erosionshould be calculated on areas with net erosion. Areas with high potential erosionhave an increased risk for phosphorus losses due to surface runoff.The potential erosion was calculated based on factors which describe how topography(LS), land use (C), soil type (K) and precipitation (R) effect the erosion.All of them have been modified to a greater or lesser extent.

Uganda anses vara ett högriskland för utveckling av nya plötsligt uppdykande sjukdomar (emerging infectious diseases, EID). Grisproduktionen i Uganda har ökat drastiskt de senaste åren och en stor del av Ugandas grisar är frigående. De kan därför lätt komma i kontakt med vilda djur i deras närområde. Porcint circovirus 2 (PCV2) är ett ubikvitärt virus och etiologiskt agens för bland annat porcine multisystemic wasting syndrome (PMWS). Förutom att infektera tamgrisar över hela världen så har PCV2 också visats kunna infektera vildsvin.

The acid deposition of sulphur- and nitrogenoxides from combustion of coal and oil cause acidification that lowers pH and gives increased contents of metals and altered aquatic biodiversity in the stream. The liming of lakes and streams, which was introduced to resist the acidification, demand large economic resourses despite of the decreased deposition of the acidifyng substances. Some of the streams are influenced by the acid deposition, while others are naturally acidic. It is therefore importaint to separate the anthropogenically acidified waters from the naturally acidic, in order to optimize the use of governmental fundings for liming. This thesis aims to estimate the acidity status and impact of acidification on 24 catchments upstream liming dispensers, which is part of the liming activities at the County of Dalarna.The acidity status of the streams was classified according to the Swedish Environmental Protection Agency old classification system (Naturvårdsverket 1999) as very acid to acid, with small ability to withstand a pH-change (alkalinity) due to acid deposition.

Using biofuels from regeneration cuttings is becoming more common in Sweden. Ash from the combustion of biofuels contains many valuable nutrients and base cations. The Swedish Forest Agency recommends that ash should be recycled to clearings where biofuels have been removed, to avoid future impoverishment of Swedish woodlands. In Jämtland, in northern Sweden, a large quantity of biofuels are taken out from cuttings but ash recycling has not yet been tried. The aim of this thesis was to examine the conditions for ash recycling in Jämtland regarding to soil chemistry and heavy metal content in soil and biofuels.

The estate of Rämningstorp in the region of Västergötland in southern Sweden is administered by the holding trust company Skogssällskapet i Skövde. In 1999 measures were taken by Skogssällskapet to drain the stream Fredstorpsbäcken as a means to increase the forest productivity of the surrounding lands, which are situated on the estate of Rämningstorp. Almost immediately after the drainage, the streamwater turned turbid and a landowner downstream reported the issue to the county administrative board of the region. The aim of this thesis was firstly to analyse the suspended matter that appeared during summer/autumn and secondly to explain why it came to be. Initial hypotheses for the explanation to the greyish turbid water were that it was either 1) a chemical/biochemical precipitate, or 2) an bacterial/algal blooming.

AbstractThe research project Liberation, supported by the European Commission under the Environment and Sustainable Development Programme (Fifth RTD Framework Programme) aimed at developing a decision support system for ecological risk assessment of contaminated sites has proposed a tiered system including the triad method. This method integrates contaminant chemistry and bioavailability analyses with observed ecotoxicological effects in soil and groundwater. In this study the triad method was used to perform a risk characterization of a former surface treatment and metal industry, now used for the student union buildings of the Mälardalen University in Eskilstuna, Sweden. On the site, high concentrations of copper, zinc and nickel have been detected in the soil in a preliminary investigation of contaminant levels with XRF. For performing the risk assessment of the site according to the triad method, contaminant bioavailability, soil metal concentrations and soil toxicity were determined and an ecological assessment was carried out on four selected soil samples (one reference soil and three samples with low (B), medium (C) and high (D) contaminant levels). Contaminant bioavailability was measured through leaching (ISO TC 190/S7) and biouptake tests (DGT).

Two haematological instruments intended for small animal clinic use were evaluated at the Department of Clinical Chemistry, Swedish University of Agricultural Sciences (SLU), Uppsala, Sweden. The QBC-V and Vet abc were compared to a reference instrument, the Cell-Dyn 3500. Fresh blood samples were obtained from canine and feline patients from the University Veterinary Hospital, SLU. The QBC-V was used for 111 canine samples and 78 canine blood samples were analysed with Vet abc. From cats, 23 samples were analysed with both instruments.

Within the next five years about 15 % of the Swedish forest owners that will undergo a succession of ownership. Presently the most common way to acquire a forest estate in Sweden is to acquire it within the family. To decide to let go after a whole life as a forest owner and manager of your own land is for many people a hard decision to make and often requires a long process. The complex process that a succession of ownership often is includes both questions about economy, legal aspects and regulations, taxes and questions of more personal nature, often called soft issues. These personal aspects or soft issues are important and can if handled poorly or not at all negatively affect relationships in the family for a very long time.

Establishing a reference interval for plasma fibrinogen in foals Fibrinogen concentrations were analysed in EDTA preserved blood plasma samples from 34 thoroughbred foals born in 2001 and 2002 at one stud farm. The foals were between 0 and 240 days old at the time of the sampling, and there were 19 fillies and 12 stallions in the group. The foals were examined for clinical symptoms of disease and their body temperature was measured before blood was sampled from the jugular vein. From totally 156 blood samples, 31 were selected as originating from clinically healthy foals, and used to determine a reference range for thoroughbred foals. Samples originating from foals showing clinical symptoms of disease or an abnormal body temperature at the time of sampling, were classified as coming from unhealthy animals.