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534 Uppsatser om Stone forming substances - Sida 14 av 36
Riskbedömning och naturligt producerade dioxiner
The highly toxic man-made substance referred to as dioxin (polychlorinated dibenzo-para-dioxins (PCDDs) and polychlorinated dibenzofurans (PCDFs)) causes severe health damages both to humans and other organisms, with lethality as its worst. Because of the toxicity several risk assessments has been performed on dioxins trying to determine at what concentration there are no risk of exposure. Resent years of research has discovered that these substances are not only anthropogenically but also producedin natural processes, like volcanoes and forest fires. To investigate if there is a need to take these naturally formed dioxins into account in the risk assessment processes, interviews with persons at relevant institutions in Sweden has been made. Analyses of existing risk assessment methods and political documents were also made to complete the picture.
En studie av metodbyte vid sintring av hårdmetaller till mikrovågsintring samt dess ekonomiska fördelar : Självständigt arbete i teknisk fysik med materialvetenskap & Självständigt arbete i kemiteknik
The aim with this study was to investigate the effects a change of manufacturing process would have on the mechanical properties of drill bits made of a WC/Co composite used for stone cutting. The method used today is sintering, where the material is heated in a conventional sintering oven. The other method was microwave sintering, where the material is heated by radiation in the microwave region. Also an investigation of the manufacturing cost were made.The main difference between the two heating methods is that the conventional way is a rather slow process and the microwave method is very fast. The material is also heated homogeniously in the method with mirowaves, aposed to the case with the conventional sintering where the material is heated from the outside in.This makes the material harder and more wear resistent.
Proppen har gått : En analys av diskursen kring Kultursamverkansmodellen
This essay aims to map the ideas behind the Swedish cultural reform called Kultursamverkansmodellen, and how the ideas are forming a discourse. Furthermore it examines the social praxis on the three levels that constitutes the model. The three levels are the state, the region and culture creators/civil society. This is a qualitative study based on primary and secondary sources collected on the three levels. The theoretical frame of reference is based on institutional theory, on Michel Foucault?s lecture on The Discourse of Language, and on New Public Management.
Immunohistochemical evaluation of antibodies for staining of mouse spinal cord and mouse neuronal cells
The United Nations has, during many years, developed a model for a globally harmonized system for classification and labeling of chemicals, with the aim of it becoming a global standard. This system is implemented in the European Union through the CLP-regulation and is now working parallel to the existing directives until 1st of June 2015, when all the new classifications of substances and mixtures must be completed. The aim of this project was to adjust the laboratory to the new legislation, through inventory of stored chemicals, update the list of chemicals and perform self-classifications of mixtures. The work included handling of about 650 different chemicals with varying hazard classifications and search for information in corporate websites and chemical databases. This resulted in a new and complete list of chemicals stored and used in the laboratory and, in addition, an example of how to make a self classification of a mixture.
Där jag aldrig varit
The sites I visit turned into routines a long time ago. Everywhere someone has decided what should be there and what will not fit. I retreat into my daydreams, away from everyday life. A longing for something different, something wonderful. I decided to go where I've never been, searching for something unknown.
Att studera validerade mätinstrument : för att mäta barns oro inför dagoperation
Background: Anxiety with children before surgery is well known. From the 1950s there are various assessment instruments. Despite that most day surgery units offer preparation for children and parents, there are many children who exhibit a strong anxiety the day of surgery, which can lead to postoperative behavioral changes. Today the nurse estimates the anxiety of a child on personal experience and knowledge, forming the basis for estimation whether the child is in need of sedation or not. The purpose: of this study was to evaluate instruments that the nurse can use in measuring the degree of anxiety of children before fast clinical settings, such as day surgery.
Lugnare katter på kliniken? : en studie om användningen av syntetiska analoger tillfelina ansiktsferomoner på svenska djursjukhus
Pheromones are chemical substances representing very specific signal messages within a species. Although a lot remains unknown about their precise effects, it is known that pheromones influence the behaviour of the receiver. Since the mid 1990s, when it was first possible to synthesise analogues of two fractions of feline facial pheromone, F3 (Feliway®) and F4 (Felifriend®), these have been used in so called pheromonotherapy to treat behavioural problems in cats. The initial use of pheromones for specific behavioural problems has been extended to cover the wide field of stress related issues. This studycontains a questionnaire where veterinary nurses and surgeons at 50 Swedish veterinary hospitals and clinics were asked about their use of synthetic analogues to feline facial pheromones in the care and treatment of cats.
Att skapa konsensus- En fallstudie av beslutsprocessen inom kommunsamarbetet NOSAM
The purpose of this thesis is to analyze the construction of consensus in commune-collaborations. By a review of written material combined with elite interviews we have been able to follow the decision-making and the forming of consensus, in a commune-collaboration called NOSAM, in which they have decided to use consensus as a decision method. The thesis is based on a case study and we have decided to follow a specific issue that has been discussed for some time.We have created an instrument based on the ideal of deliberative democracy, through which we have been able to examine whether the decision-making in NOSAM can be described as a deliberative process or if consensus is formed by other incentives.The study shows that the decision-making in NOSAM cannot be described as a deliberative process, although there are some elements of deliberation. Consensus is formed in a proposition drawn up by the officials for the commune-representatives to agree on. Afterwards, the decision has to be brought up in each commune before reaching a final decision in NOSAM.Our opinion is that having consensus as the decision method leads to difficulties when deciding on bigger issues..
Produktutveckling av mobil förstahjälpenstation
This thesis is about a part of the marquetrytechnique, scorching. Scorching is made by heating up something, put a veneer into the heated substance and make a controlled burning. This technique is old but still used today and have according to me great potential for development. In my work I wanted to give the scorching greater room then I earlier have seen. I wanted the scorching to be the dominant ingredient for a decorative element in a piece of furniture or an interior.
Tillagning i mikrovågsugn och dess effekt på livsmedel : En jämförelse med konventionell tillagning
Microwave is a time- efficient device for heating and reheating of foods. Despite the fact that its effects on foods have been evaluated during a long period of time, without any more negative effects shown compared to conventional cooking, one third of the Swedish population believes (in 2010) it accounts for a higher loss of nutrition.
This literature review aim to compile studies regarding how food is affected by cooking in microwave, with respect to cooking losses, nutrition, secondary metabolites as well as sensory and textural aspects and compare it with conventional cooking.
The compilation shows that different combination of effect (W), time and amount of water during microwave cooking have different effects on foods. The contents of proteins, vitamin B and carbohydrates are generally higher after microwave cooking, while anti-nutritional substances are affected much less during conventional cooking. This also depends on if it is of animal or non-animal origin. However, for the majority of nutrition values the differences are quite small.
Tillagning i mikrova?gsugn och dess effekt pa? livsmedel : en ja?mfo?relse med konventionell tillagning
Microwave is a time- efficient device for heating and reheating of foods. Despite the fact that its effects on foods have been evaluated during a long period of time, without any more negative effects shown compared to conventional cooking, one third of the Swedish
population believes (in 2010) it accounts for a higher loss of nutrition.
This literature review aim to compile studies regarding how food is affected by cooking in microwave, with respect to cooking losses, nutrition, secondary metabolites as well as sensory and textural aspects and compare it with conventional cooking.
The compilation shows that different combination of effect (W), time and amount of water during microwave cooking have different effects on foods. The contents of proteins, vitamin B and carbohydrates are generally higher after microwave cooking, while anti-nutritional substances are affected much less during conventional cooking. This also depends on if it is of animal or non-animal origin.
However, for the majority of nutrition values the differences are quite small.
Mjölk, gluten och ADHD : En litteraturundersökning om mjölk och glutens påverkan hos barn med ADHD
Attention Deficit Hyperactivity Disorder (ADHD) is becoming a more common diagnosis of younger children. In recent years the perception that some ingredients in our food may have a negative effect regarding the symptoms in children with ADHD has grown stronger. Children with ADHD often suffer from irritated bowel syndromes which affect their ability to digest food. This may result in malnutrition as well as a release of substances that are harmful.The purpose of this report is to compile and illustrate the knowledge of how special food, particular milk protein and gluten, may affect the symptoms of children with ADHD. Also, the report aims to evaluate if there should be changes made in Kindergarten to increase the well-being of these children.
Varumärken och varningsetiketter: En kvantitativ studie i hur varningsetiketter påverkar personer då de är placerade på läskförpackningar och om varningsetiketternas effekt påverkas av varumärket
Warning labels can be used to change the attitude and behavior in the general public. The use of warning labels is also increasing and suggestions have been made to expand their use to more general food products. However, the research regarding the effects of warning labels and how other factors may influence them is limited.The purpose of this study was to develop the research on warning labels and the effects the strength of the brand might have on the warning label?s effect on more regular food products. To achieve this goal a 2x2 factorial design was used where over 200 respondents filled in four different forms.
Debatten om de oberoende biblioteken på Kuba 1998-2001. Tre biblioteksrelaterade organisationers syn på de kubanska biblioteken och intellektuell frihet.
During the late 1990s a movement with the intention of forming independent libraries emerged on Cuba. They were seen as an alternative to the public libraries which were supposed to be suffering from censorship by the Cuban government. The purpose of this thesis is to compile and bring structure in a debate regarding public libraries on Cuba and what have become known as independent libraries. In this thesis a textual analysis has been approached for examining articles, websites and reports concerning what attitudes and position the library support organizations Friends of Cuban Libraries FCL, Cuban Libraries Solidarity Group CLSG and IFLA/FAIFE have regarding the two different library types. These positions is throughout the survey connected with the concept of intellectual freedom.
Arenainvesteringar i Stockholm : En studie av sex arenor.
The modern arena as we know it today has its origins from about 100 years ago. Since then a lot of aspects have been changed and developed. Arenas built in the same age tend to have the same features and configurations and can therefore be categorized into different generations. Stockholm is represented in each generation but the fourth that constitutes arenas of the early 21st century. Besides that there has been several arena constructions built through the entire 20th century and now most recently in 2010s.The overall motive behind arena investments can be categorized into two types.