5-hydroxytryptamin (5-HT) is biochemically derived from Tryptophan. Kynurenic acid and quinolinic acid are also known metabolites of tryptophan. 5-HT is considered to play a role in depression and today selective serotonin reuptake inhibitors (SSRIs) are used for treatment of depression. 5-HT may also play a role in pain perception. The aim of this study was to investigate whether a supplement of tryptophan may affect conditions such as depression and/or pain.

Along with the increasing trend of online advertising comes an increasing avoidance behaviour from the observers. The marketing communication now requires a valuable content, which leads to the creation of new online advertising forms; including content marketing, advertorials, online ads and the latest rising star - Native Advertising. The last-mentioned also constitutes the basis and object of study for this paper. The purpose of this study is to shed light into this relatively unexplored topic and concretize the true effects. There are many examples of how Native Advertising is framed and implemented, but little hard facts and real figures.

The standard housing of farmed mink provides little opportunities for them to behave naturally and abnormal behaviours such as stereotypic behaviour and tail biting may occur. To prevent abnormal behaviours animals in captivity are often provided with different kinds of enrichments. The aim of this study was to investigate what kind of enrichment farmed mink use when they have several kinds to choose from and to observe if abnormal behaviours can be decreased with a larger cage and a more multifaceted environment. Totally 20 silver blue, 10 months old female mink were kept in traditional cages (80x30x40 cm) for 7 days and in larger cages (195x80x40 cm) with several types of enrichments for 7 days. The enrichments were wire net- and wooden shelves, wire net- and plastic cylinders, water bath, plastic ropes, branches, straw and tennis balls. One-zero scan sampling on behaviour and choice of place were performed during 3 hours and 20 minutes prior to feeding during 7 days per treatment in April 2004.

Concerns for the environment and our impact on it are becoming more prevalant; however, we rarely act accordingly. Consumers mainly choose products based on perceived personal benefits despite the environmental motives that increasingly affect them. The purpose of this thesis is to identify the major drivers behind the purchase of ecological wine. A quantitative study was conducted, using Theory of Planned Behavior (TPB) as an initial starting point. The subsequent model was then completed with three variables: environmental concern, feelings and word-of-mouth.

Traditionally the content of fiction has not been described, analyzed, classified and/or indexed to the same extent as non-fiction. As a consequence, this lack of content analysis has resulted in unsatisfactory fiction retrieval in relation to users seeking and search behaviour. This fact is why this Master s thesis is written. The total of library users' seeking and search behaviour is investigated in order to suggest methods to improve user adapted fiction retrieval tools. Suggesting relevant fiction retrieval tools corresponding to users' seeking/search behaviour is another aim of the study.

The purpose of this thesis is to gain a holistic understanding of who are the consumers of fortified health food products; moreover to highlight what are the characteristics of the consumers who are likely to purchase these products. This thesis employed a quantitative strategy with an inductive and a grounded theory approach. The data was collected from a research company. Existing theories in the area of functional food were not possible to find. Considering that the area is new this seems plausible; however, previous studies provided insight for substantive framework.

Background: From a public health perspective it is of great interest to prevent the risk of noise induced hearing loss, because in addition to hearing loss, tinnitus and sound sensitivity also may lead to other health problems. About 1,4 million people in Sweden live with some form of hearing loss and 25000 of them are children under the age of 16. Studies have shown that hearing loss among adolescents is increasing and it is often associated with sound environments in their leisure time. Lectures in hearing prevention has been conducted in schools for adolescents but have not reached the desired results. Objective: To enquire caregivers? attitude, behaviour and perceived knowledge about sound exposure and its risks.

Relationship between social behaviour, feeding behaviour and performance of boars using single-space feeders A study on the behavioural patterns of growing boars is presented. The study was preformed at Quality Genetics? boar testing station Månseryd in Sweden. The boars were purebred Yorkshire, Hampshire or Landrace, born in nine different nucleus farms. The study is based on two batches of boars, with 63 and 69 boars respectively.

The world is facing huge challenges to overcome the climate crisis. A contributing actor to the environmental footprints are the textile industry and their production processes, which highlights the importance to act. The purpose of this study is therefore to investigate how a middle size company's purchase- and design department work to contribute to sustainable fashion and sustainable consumption. As well as to examine the challenges and possibilities that the fashion company faces in its sustainability work. The qualitative study has been prepared and is based on 15 interviews with employees in the purchase- and design department.

The abrupt and early weaning of intensively kept lambs may have serious animal welfare implications, but relatively little is known about this. Weaning includes the breaking of the mother-young bond and abrupt replacement of milk by solid food, often coinciding with changes in the (social) environment. Altogether, these changes are likely to affect lamb welfare significantly. This study aimed to establish how strong and persistent lamb welfare is impaired following abrupt weaning by means of measuring behaviour parameters indicative of affective state. Also, we investigated the existence of a diurnal rhythm in play behaviour, which is considered an important indicator of positive affect and good welfare.

The purpose of this thesis is to examine Skogsstyrelsens event Skogens Dag as an information channel by looking at information use and information behaviour during the communication process of the event. This is done by examining the aims of Skogsstyrelsens information distribution during the event in relation to its outcomes. The evaluation is focused on long term effects on the target group and it is restricted to Skogens Dag in Borås 2005. The question this thesis intends to answer is: How does the event Skogens Dag function as a tool for information distribution? The theoretical background gives an account of the communication process as well as the relevant aspects of marketing, social marketing, campaigns and public relations, as these are communication attempts that can use an event as a medium.

The increased media clutter requires of brand managers to be innovative and creative in their choices of marketing communications in order for brands to be salient in the minds of consumers. Recent studies emphasize incongruent marketing as a means of "standing out" from this competitive clutter and reaching existing and new potential customers. The aim of this thesis is to examine the effects of brand incongruent sponsorships (sponsorships which are incongruent with established brand associations) on consumer response to well-established brands from the perspective of high and low levels of loyalty. A quantitative survey was conducted and the results show that incongruent sponsorships improve brand attitude, brand interest and brand credibility, while not affecting ad attitude, purchase intention and word-of-mouth intention for customers of low loyalty. For highly loyal customers the findings were that brand attitude, brand interest, brand credibility, purchase intention and word-of-mouth intention remained unchanged while ad attitude decreased.

It is reported that adolescents' health is deteriorating, when their mental illness has increased. Adolescents' social conditions have also become worse. The mental illness is linked to the individual living conditions. The purpose of this study is to investigate which factors adolescents experience have been contributing to making a lifestyle change. The apparent factors can be used to promote adolescents´ health.

The use of marketing research panels are a more and more frequently used source of information for studies within many different branches. The purpose of this report is to investigate the demographic composition of panels and compare it with the population of Sweden, a possible change in behaviour of respondents, and if the source of recruitment is the cause of possible differences in study results. The study was commissioned by Norstats Linkoping office. Sources for the data material include Norstat?s recruitment process and their two main panels with different recruitment sources.

The modern beauty market is concentrated with intense competition where cosmetic brands fight to stay on top. A popular method in order to gain sales and increase margins is to influence existing customers to buy more with the use of suggestive selling. The purpose of this paper, was to further examine the different effects of suggestive selling with the use of complementary versus non- complementary goods in the form of customer satisfaction, customer view of the service encounter, as well as success in sales. In addition, the influence of the customer's purchase amount on the tendency to buy an extra product in a suggestive selling situation was examined. The study was conducted through the use of a field experiment with the support of surveys in 'The Body Shop'.