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6314 Uppsatser om Man-made cellulose fibres - Sida 2 av 421
Vätning på mikroskala
Individual cellulose ?bers were studied to identify the transport and absorbtion phenomena as well as the in?uence of drying. A Chalmers University of Technologydeveloped method within ESEM (Enviromental Scanning Electron Microscope) has been used in this study. The results from the laborations gave the following conclu-sions: The transport of water occurs in ?bers in the ?ber wall surface and the lumen.
Vedrötor i stadsträd : biologi, detektionsmetoder och förebyggande åtgärder
Urban trees have very little in common with trees on natural sites, such as forests or pastures. Trees in urban environments are often planted in packed soil and in small volumes. This can lead to decreased availability of water and oxygen, as well as deteriorated ability for the soil to store nutritional elements. Also above ground the tree usually have limited space in cities. Regulations on free height over roads and cycle tracks demands high stems at an early stage of their development.
3D-modell av torkcyklon - Examensarbete på Metso Panelboard AB i Sundsvall
This Bachelor of Science thesis was carried out at Metso Panelboard AB, located in
Sundsvall, Sweden. The work lasted for 10 weeks and began at the end of February 2007.
Metso Panelboard is one of the leading suppliers of complete lines, single machines,
engineering knowledge and after-market services to the fibreboard industries.
The task involved building a 3D-model of a dryer cyclone in the CAD-program
Pro/ENGINEER. A dryer cyclone is the part where the tree fibres are dried in the process of
manufacturing fibreboards. Currently, it takes about two weeks to draw a dryer cyclone. By
creating a 3D-model of it, which should have the functionality to be generated to different
sizes, the goal is to decrease the drawing time to about 20 hours and to increase the quality of
the work.
This report includes the fundamental theories behind the manufacturing of fibreboards with
focus on the dryer cyclone.
Leksaker : Fem föräldrar reflekterar kring leksaker
In this study I have explored five parents reasoning about toys, from a gender perspective. During the interviews, we have reasoned about toys that are made for girls and for boys, what the differences are, and what advantages and disadvantages there might be for children to play with a variation of toys, made for both genders. The results of the study show that most of the participants are more accepting for girls playing with toys made for boys than the other way around, which indicates that boys? experience of the world might be somewhat limited, while girls have easier access to toys made for both genders..
"De tycka emellertid av gammal vana att det smakar gott, och tro dessutom att det är bra för hälsan" : samiskt växtutnyttjande från 1600-talet fram till ca 1950
Meat and fish was the most important food for the Sami people in northern Scandinavia until the beginning of the 20th century. It is not so well known that the Sami people also used a lot of wild plants as food and medicine although that kind of food was relatively common among them until the end of the 19th century. The purpose of this master thesis has been to describe which plants the Sami people used in general and also which plants were the most commonly used, and when and how these plants were harvested. I also wanted to measure the quantities of Angelica archangelica and Rumex acestosa within traditional harvest sites. Furthermore I wanted to find out if the plant use differed among Sami groups geographically.
Marklyft som behandling mot långvarig ländryggsmärta: en Single Subject Experimental Design
Background: Low back pain (LBP) is a common disorder in the western world. A majority of those afflicted by a first acute episode is at high risk of developing sub-acute or persistent symptoms. Persistent LBP can be caused by pathological changes in the discs and disturbed neuromuscular activation, which can cause hypotrophy of the extensors strong type-2 muscle fibres. Deadlift (DL) is an exercise that may correct all these pathological transformations. Aim: To investigate the effect of DL-training on patients with persistent LBP.
Whole grain wheat : effects of peeling and pearling on chemical composition, taste and colour
The EU-project HEALTHGRAIN has suggested a new definition for whole grain which allows a small part of the grain to be removed during processing. By removing the outer part or the grain the hygienic quality will increase but it is not clear how the taste and colour is affected. So therefore in this study three different debranning methods, peeling, pearling and polishing, which remove the outer parts of the grains have been used on common and durum wheat. The dietary fibre and ash content, as well as germination was analysed in untreated, peeled, pearled and polished grains. The decrease in dietary fibre and ash was higher in grains that had been pearled compared to those that had been peeled or polished.
Mozzarella : En djupdykning i ostmassan
Worldwide consumption of cheese has increased over the years. The average Swede consumes somewhere around 20 kilograms of cheese per year, which is an increase of a 100 % over the past 50 years. One of the most popular kinds of cheese during the past decades is mozzarella, due to its? use as pizza cheese. Flavor and consistency differ between the traditional kind, made out of buffalo?s milk, and the industrially made kind, made out of cow?s milk.
Förpackning med förbättrad miljö- och säljaspekt : Ett projekt i samarbete med Primus Sverige AB
This work of examination describes an environmentally oriented product development aimed to develop new packaging with improved environmental and sale aspects of the products from Primus Sweden AB. The report covers the design process from the first collection of facts to the final results with a description of all methods involved in the work. The focus has been on a clear environmental awareness and the report contains a deepening of the concept life cycle assessment (LCA) for product development. In the process, the consumers? opinions of the brand Primus and environmental profiling formed the basis for the packaging to communicate the right values such as quality, technology, environmental awareness and adventurer?s first choice.The deepening of the life cycle analysis shows that composting and other alternative treatment of the biological cycle is not possible to implement in a satisfactory way in the design process.The work results in two final concepts.
Obtaining high quality textile fibre from industrial hemp through organic cultivation
AbstractThe urgency to find alternative fabrics to conventionally produced cotton is increasing as vast amounts of agrochemicals are used and a lot of irrigation is required. In this literature survey the potential of organic cultivation practices to produce highly qualitative hemp fibre, suitable for the textile industry, was investigated. The definition of a fibre in the textile context as well as of the qualities that are essential for a textile fibre was necessary as a base for the discussion in this thesis. The quality parameters looked at were fineness, strength, length, friction, and colour. The impact of external growth factors and plant development on these quality properties are discussed.
Undervisning i media : med fokus på elever med läs- och skrivsvårigheter
This paper is based on observations made in the classroom, interviews and studies ofliterature.The observations that I made during my practical training period made me believethat pupils with writing and reading problems succeeded more often with the methodsof teaching used in media education than with more traditional teaching methods.Through this study I hope to specify and define the factors that were the reasons for this. In doing so I wanted to show that you could adapt the teaching methods to reach more pupils with different kinds of learning styles.I have come to the conclusion that the following factors made the pupils with writing and reading problems succeed more often in subjects related to media education:Variety, time spent, the pupils? interests and the equipment used..
En förstudie för bioetanol produktion i Borås
AbstractThe purpose of project is to study the possibility for Borås Energy & Environment to build and run a commercial ethanol production facility in Borås. The project also studies the technology for the production of ethanol using renewable energy, e.g. lignocelluloses with focus on two processes, svag-syra hydrolyse and enzymatic hydrolyse. The technology of the process is based of hydrolysation of biomass (hemicelluloses and cellulose) to sugar and extract it to ethanol. These two techniques will compare with each other to determine which of them that it?s more suitable for ethanol production.
Spelar tarmcellernas interna fettförbränning en roll i regleringen av födointag?
Since several lifestyle diseases are associated with obesity much research is carried out within the area. Researchers have found that oxidation of fatty acids within the body?s cells may give rise to peripheral signals which regulate food intake, but it is still unclear where such a mechanism takes place. Although much evidence suggests that it is the hepatocytes in the liver that send signals regulating food intake, some researchers have begun to question this theory. Instead they argue that the mechanism takes place within the enterocytes since they are well localised in the gut for such assignment.
Alternativ hylluppställning: en undersökning av hylluppställning och biblioteksmiljö på Västerviks stadsbibliotek.
The purpose of this Masters thesis has been to study the changes made in shelf arrangement and library environment in a Swedish public library. The aim was to examine the reasoning done by the library staff regarding classification, the Swedish classification system SAB and changes in library environment. The basis of our study were three questions: 1. Why has Västervik public library made changes in the shelf arrangement? 2.
Tailor-made : En studie om skräddarsydda produkter på internet
The purpose of this study is to describe and analyze how companies offering tailor made products on the internet, can work with their marketing and their customer relationships. The study will answer the purpose from a service management perspective and there will also be presented theories from an Electronic Commerce perspective.The starting point for this study was the qualitative method. The essay builds its empirical material from interviews with knowledgeable persons in the subject and the owner of the company whose products are tailor made and sold on the internet. It was conducted seven interviews, four of which were face-to-face, two conducted by mail and finally there was made a telephone interview.Conclusions have been drawn based on the empirical material and theory. The study has been able to identify three concepts that are central to this type of product: Site-building, customer involvement and promotion & relationship management..