Östby waterworks in the community of Kramfors has since 2003 had problems of fast clogging of the slow sand filters. As the clogging appears more often, they must be cleaned more frequently which has made the drinking water preparation difficult. Wintertime it has sometimes been impossible to clean the filters which has led to their closing and this has influenced the water quality negatively.The waterworks is a surface waterworks which takes its raw water from the lake Sjöbysjön. The water is flocculated and filtered in a contact filter with the flocculent EKOFLOCK 91. Thereafter it is alkalinized before it reaches the outdoors placed slow sand filters.

This master thesis deals with two case studies in environmental archaeology and battlefield archaeology focusing on two major events in the late history of the Swedish coastal town Umeå and its nearby village Sävar. Established in the early 1600's, Umeå was known for its export of timber and import of cereals. The town has suffered from numerous fires, the fire in 1888 being the most devastating. Few written records of the town remain from before the 1900's. The latest war in Sweden's history is documented in historical sources and took place at Krutbrånet, Sävar where the Swedish troops suffered defeat against the russian forces in 1809.

 This report deals with thecollaborative project between FagrellProdukt Utveckling AB and studentsfrom the Faculty of Science andTechnology at Uppsala University. Theoverall objective of the project wasin addition to developing students'abilities, to help Fagrell withverification and development ofFagrells prototype, Fundamental flowreactor, for flow Chemistry. Theuniqueness of Fagrells flow reactor isthat it should be simple andaffordable compared to competing flowreactors in the market.The verification was done bylaboratory and simulation sessions.The verification shows that Fagrellsidea on how to construct a flowreactor is very good.The development included bothtechnology and business. The result ofdevelopments can be helpful for thecommercialization of Fagrell flowreactor..

This report presents the use of questions by both teachers and students in Chemistry class. Both students and teachers have been observed during 24 lessons, both theoretical and practical. In addition, interviews have been made with the teachers and the students have answered a questionnaire. The result show that a high number of questions are asked, more than one per minute and that both teachers and students ask the same amount of questions. This contradicts earlier findings were teachers questions dominate.

Uranium (U) is a naturally occurring component in bedrock and under the "right" conditions it can dissolve and move into the ground water. Since many people in Sweden depend on drilled wells as their main drinking water supply, they may be exposed to the uranium in the water. Radioactive radiation is not the major concern associated with naturally occurring uranium. It is rather the chemical properties of uranium that make it a potential danger to human health. Uranium is proven to have toxic effects with respect to the functioning of the kidneys.

The employment interview is an important part of the recruitment process because the recruiter then has a chance to form an opinion about the applicant as a person. The purpose with this study has been to examine if there are any differences between inhouse-recruiters and recruiting consultants concerning the employment interview and its assessment methods. Five inhouse-recruiters and five recruiting consultants have been interviewed on the basis of a manual. There are differences between the groups in 6 of the 17 themes that have been examined: purpose with the employment interview, private-, double- or panelinterview, length of the interview, personal Chemistry, appearance and objectivity in the assessment. Many of the differences are caused by the fact that inhouse-recruiters recruit for their own organisation and recruiting consultants recruit for a client.

This report is a degree paper made for the Engineering program in Technical Chemistry at the School of Engineering, Jönköping University.The intention of the project which is described, is to answer whether HV71 might become environmentally certified according to the criteria of "miljödiplomering". The project also included an investigation of which further steps and measures must be undertaken by the enterprise in order to achieve the certificate. The final part was to implement the necessary requirements for the certification.The report starts with a short background where the origin and function of environmental management is briefly explained.The report continues with how the practical work with the environmental certification was done according to requirements of Jönköping municipality. Motivations behind each part of the process are given as well as explanations of how each part of the process was carried out.The final result of the project was that HV71 took the measures needed to live up to the required demands. After a revision made by Miljöstrategen i Jönköping AB, HV71 passed the demands and became thereby an environmentally certified business..

The aim of the study was to investigate if methane emission in a constructed wetland changed in a diurnal pattern correlating to temperature, humidity or light conditions. The gas measurements were carried out with a static chamber technique. The wetland (in Nykvarn outside of Linköping, Sweden) takes care of wastewater to reduce the nitrogen loads. Measurements were carried out at three different occasions in the summer of 1998 on two sites in the wetland. One site was close to the inflow, inhabited by Lemnaceae, and another site was located further downstream inhabited by the emergent macrophyte Typha latifolia.

The purpose of this thesis was to develop and optimize a method of analysis for combustion of organic chemical products, followed by an ion chromatographic quantitative analysis. This was to be achieved with the decomposition equipment IKA AOD 1. The aim was to receive a precise and repeatable method that would be able to be applied to the process of qualification and technical marking of chemical products at the company, OKG AB in Oskarshamn. A complete instruction for the decomposition equipment and the method of analysis was written. A number of parameters were chosen from the general method of the combustion equipment, which then was tested parallel with a simultaneous development of an appropriate ion chromatographic method.

This paper presents why and how teachers use newspaper articles in the classroom when they educate their pupils in Chemistry, biology and nature science. All the teachers have worked over 20 years and are, when interviewed, at a Swedish gymnasium in Dalarna. I also have, in a small study, interviewed some of their pupils to get their view about teachers using news paper articles during lessons.The teacher?s use of newspaper articles in the classroom can be divided in different ways. They can use the articles to illustrate up to date links to everyday life.

Areal is one of the major players in the Swedish market for real estate brokerage of agricultural properties and related additional services. The purpose of this report is to give a better picture of the needs for additional services of property purchasers of Areal. Add-on services are the type of counseling you may need to achieve good economy on an agricultural property. Through a survey of property buyers of Areal information has been collected and compiled. A very good response rate was obtained and the material seemed reliable as it reflected the population in general.

This thesis has been focused around the Diels Alder reaction with the goal to design an enzyme catalyzed reaction pathway. To achieve this goal computer aided enzyme design was utilized. Common traditional methods of computational Chemistry (B3LYP, MP2) do not do well when calculating reaction barriers or even reaction energies for the Diels Alder reaction. New calcu- lation methods were developed and tested. This was the focus of the first part of the thesis, by choosing a small system, extensive and heavy calculations could be done with CBS-QB3.

The aim of this study was to investigate preschool teacher?s perceptions about the curriculum goal concerning simple chemical processes. The result was based on narratives received by a qualitative study and semi-structured interviews of six preschool teachers. The results of the study showed that preschool teachers perceive that they actually are working in a relatively small scale with simple chemical processes and they do not really know what simple chemical processes are, and do not feel very familiar with the subject. Water, dough, mud, paint and baking were the most common activities that were used when working towards the curricular goal. However, it was never explained to the children that it was simple chemical processes they were working with during the activities, neither was it discussed among colleagues because of the uncertainty about the concept.

Acidification is a central concept in the environmental debate. The effect of acidification of the soil is a matter of a decreasing amount of cations and thereby a decreasing ability to resist a supply of hydrogen ions to the soil. Acidification has gradually increased in the O horizon in Västerbotten over a 30-year period from the 1970th to the 1990th. The aim of this study was from inventories of The Swedish National Forest Soil Survey and The Swedish National Forest Inventory explain and quantify the acidification that has occurred in the O horizon of two regions in the north of Sweden. Data from SMHI, The Swedish Meteorological and Hydrological Institute, has also been used.

The main purposes of this study were to 1) quantify bacterial production in winter during ice conditions, and 2) to compare these production measures with values measured from summer and open water conditions in three humic lakes situated in northern Sweden. Another purpose of this study was to 3) examine whether clear-cutting significantly affected bacterial production or water Chemistry in two lakes situated in catchments were a large part of the forest had been removed through logging compared to an undisturbed reference lake. In winter (March/April 2014), the bacterial production ranged from 0, 7 - 2, 2 µgC/L/day and in the summer of 2013 the production values was 4 ? 10 times higher. The main reason for lower bacterial production in winter was ascribed to lower water temperatures as well as to older and more recalcitrant DOC, as there were no significant differences in total dissolved nitrogen or DOC concentration or -quality, that could explain a lower production compared to summer.