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918 Uppsatser om Species interactions - Sida 46 av 62

Downward migration and transfer to plants of radiocaesium in Scottish soil profiles : a comparison with earlier studies

Following the accident at the nuclear power plant in Chernobyl in 1986, great volumes of137Cs were distributed over large parts of the former Soviet Union and Europe. Over Scotland,radiocaesium was deposited as wet deposition. Due to the relatively long physical half-life of30 years, there are still measurable activity concentrations in the natural environment. Thisstudy was made on two organic soils, Knockandy Hill and Rora Moss, situated in the easternpart of the central highlands of Scotland. At these two sites, studies on migration and transferbetween soil and plants were conducted.

Odlingsmetodernas påverkan på vitaliteten hos Prunus avium :

The objective of this study was to get a better understanding of how the cultivation methods influence the vitality in Prunus avium. The purpose was also to examine if there was any differences in shoot growth and trunk expansion depending on the method of cultivation. To find the answer to this question a literature study and a case study has been done. The literature study concerns the concepts vitality and stress. Different definitions of these concepts are shown and their connection whit establishment is explained. In the background the species Prunus avium, and the four method of cultivation that are included in this case study are described. Measurements of the shoot growth and trunk expansion were made in this study, and as a complement to these methods, a visual estimate of the vitality was made.

Alternativa stråbränslen i växtföljden :

The purpose of this report is to find out which crops, that are good for strawfuel, and can be grown i the area around the city of Lund. The background of this report it that Lunds energy is planning to bild a biofuelheated thermal power station in Örtofta outside of Lund. I have in the report limited me to the crops hemp, whole crop (triticale), reed canary grass, elephant grass and jerusalem artichoke. I have through a documentary research checked the crops, cultivabillity in the south of Sweden, and how they should fit, in the Scanian crop sequence. Hemp is an annual crop which probably could manage in the Scanian crop sequence. Whole crop often triticale because of it´s high yield and low rate of shed seed. Could also fit into the crop sequence of crop in Scanian. Triticale is annual, and could be grown at the same kind of fields as used to wheat, whith is why it would be possible to grow it in Scania. Reed canary grass is a reedlike grass that is easy grown at most soils.

Barn och ungas roller och interaktioner @ Internet : En litteraturstudie av vetenskaplig kunskap på området

Teknologi har blivit en viktig del i barn och ungdomars liv. Spel, kommunikation, bloggar, skolarbeten och att umgås via sociala nätverk tillhör aktiviteterna online. Syftet med den här litteraturstudien var att utifrån ett teoretiskt perspektiv där bland annat Actor-Network-Theory (ANT) ingår belysa och utforska barns och unga människors interaktioner på och med Internet och det lärande och förutsättningar för hälsa som kan skapas. Tjugotre artiklar från tidskrifter med en disciplinär bredd, som bland annat innefattar utbildningsteknologi, psykologi, socio-logi och mediakunskap, har studerats. Interaktion var ett genomgående tema i artiklarna.

Sällskapsdjurens betydelse för människans hälsa och välbefinnande - effekten av oxytocin

Historiskt sett har djur haft stor betydelse och anses fortfarande vara viktiga för människan. Djurens roll som sällskapsdjur i dagens samhälle har varit som familjemedlem, kamrat och sällskap. Sällskapsdjuren har också flera positiva effekter på människans hälsa och välbefinnande. Redan i början av 1960-talet fann forskare att hundar hade en unik inverkan på människor i svåra situationer och på människor med särskilda behov. Sällskapsdjur uppfattades som icke-fördömande, tillgivna samt kärleksfulla och därför har djur använts inom vård och rehabilitering. En växande mängd internationella forskningsstudier indikerar att djur kan ha värdefulla effekter på människan och främjar individens hälsa och välbefinnande, fysiologiskt och psykologiskt.

Prevalence and antibiotic resistance of Campylobacter spp. in poultry and raw meat in the Can Tho Province, Vietnam

The aims of the study were to investigate the prevalence and antibiotic resistance of Campylobacter jejuni and Campylobacter coli in chicken and chicken products, and to investigate farmer awareness of antibiotic resistance development. The study was conducted in the Can Tho province in Vietnam during six weeks in October to November 2008. Ninety-six samples from raw chickens were collected from twelve market places and analysed for the presence of Campylobacter. A total of 96 cloacal swabs from 20 farms were obtained and analysed for the presence of Campylobacter. Farmers were asked to answer eight questions concerning the housing of the chickens, modes of handling sick animals as well as use and knowledge of antibiotics and resistance development to antibiotics.

Mätning av stamdiameter med markstående scanner :

Booth for operational planning of harvesting and for long term planning, data is today collected manually. Intensive objective field inventories are usually too expensive. To enhance optimisation of timber flow from forest to industry Moore efficient methods for measuring tree stems of standing trees are needed. The performance of terrestrial laser scanners have improved and these could possibly be used within forestry in the future. The objective of this study was to validate how a terrestrial laser scanner could be used to measure stem diameter, and to test how the errors depend on distance from the scanner and tree species. Two plots (one pine and one spruce) were used for this study.

The significance of oxytocin in canine mammary tumours

Oxytocin is a hormone which plays a crucial role in many reproductive and behavioural functions. It affects many organs and the classical peripheral targets are the mammary glands during lactation and uterus during labour. Oxytocin receptors have recently been described in a variety of normal tissues and primary cell cultures, but also in neoplastic tissues and established neoplastic cell lines, as breast cancer cell lines. The signalling pathways and biological effects of the oxytocin/oxytocin receptor system seem to depend on species, type of tissue, physiological versus neoplastic state and receptor location within the cell membrane.The aim of this project was to find out if the cell proliferation in the canine mammary carcinoma cell line CMT-U27 was affected upon stimulation of oxytocin, and to investigate the presence of oxytocin receptors in these cells. The cell proliferation was examined by using an ELISA-kit, where the absorbance measured is relative to the amount of living cells.

Samspel i staden : en studie av Shared Space ur landskapsarkitektens perspektiv

In East Africa live two species of Griffon Vultures; Rüppel?s Griffon Vulture (Gyps rueppellii) and African White-backed Griffon Vulture (G. africanus). One of the apparently most important factors limiting the population of these birds is food supply. Griffon vultures nest for eight months of the year, and are during this period geographically tied down to the nesting place.

Behaviours of wild male and female Colobus angolensis palliatus during morning and afternoon in Diani Beach, Kenya

Colobus angolensis palliatus is a small old world monkey inhabiting southern coastal Kenya to southern Tanzania. The species activity budget is known to vary between seasons and areas, probably due to differences in group sizes, diets, predatory presence and resource competition. The variations between male and female activity budgets are reckoned to be a result of pregnancy and lactation. The aim of this study was to investigate potential differences in behaviours between morning and afternoon periods and between males and females. The study was carried out in two forest fragments in Diani Beach on the south coast of Kenya.

Tystnad och Tillhörighet : berättelser om homosexualitet från 1980-talets Polen

There was a silence surrounding homosexuality in the People's Republic of Poland. One can almost get the impression that same sex love, and same sex relationships, did not even exist there; that the communists had successfully removed homosexuality from society. The roots of this silence can be found in the Communist Party´s disdain for anything deemed individualist and deviant, and also in the conservatism and religiosity of the Polish society.In my thesis I study when and how gays and lesbians found a way out of the silence that surrounded their sexuality. Gay men did so by creating subcultures, which found refuge in parks, public bathrooms and a few bars in larger Polish cities, and offered a sense of belonging for them. Lesbians, on the other hand, lacked this access to semi-public spheres, which made it even harder for them to find each other and create a space for their sexuality.

The movement of the rider?s hand related to the horse?s behaviour and the stride cycle

One way of signalling commands to the horse during riding is through applying tension on the reins to create bit pressure in the horse?s mouth (Terada et al., 2006; Clayton et al., 2011). The skilfulness of the rider in using the hands when applying bit pressure has consequences both for the horse?s performance and welfare (Manfredi et al., 2010). At the trot there are large vertical deviations of the horse?s body which the rider must adjust and adapt to (Terada et al., 2006) and an unsteady hand due to inability to follow the horse?s movement can be a source of discomfort and conflict behaviour in the horse (Heleski et al., 2009).

Att uträtta affärer på ett "smartare" sätt : En studie av två hotellkedjors tillämpning av Corporate Social Responsibility

Introduction and research question:  This study investigates the widely discussed notion ?Corporate Social Responsibility? and its practice in the tourism industry. In the contemporary society more companies are realizing the significance of Corporate Social Responsibility (CSR) and its potential as a means of differentiation.  The author?s interest in this particular phenomenon was awakened after reading about the business case of Scandic Hotels. This is a company that nowadays is referred to as ?Scandinavia?s leading hotel chain?.

Prevalence of selected infectious diseases in Samoan dogs

SCA is the largest private owned forest owner in Sweden, with an ownership of 2 million hectares of productive forestland. To manage the planning of such large areas and to fit the traditional organization structure of a Swedish forest company, the planning approach is subdivided into three stages; strategic, tactical and operational. The strategic part, based on a statistic sample of stands, returns a harvest level estimate which should then be implemented at actual sites in the tactical part. This procedure can lead to incompatible solutions as the strategic solution is not necessarily possible to translate into actual sites in the tactical plan. The geographic aspect is important in tactical planning due to the large costs for moving equipment and maintenance of a large number of forest roads.

Integrationen av etniska minoriteter i de tre Baltiska staterna

This essay is a comparative empirical study of ethnic integration mainly of the Russian-speaking minorities in the three Baltic states (Estonia, Latvia and Lithuania) in a post-communism setting. As Lithuania has a Polish minority that is as large as the Russian-speaking, they too shall be included in the study but not as thoroughly as the Russian-speaking minority. Thus the problem is: to what degree are the ethnic minorities integrated with the titular nations in Estonia, Latvia and Lithuania? In order to study ethnic integration I have set up a theoretical framework largely based on Weiner?s theory of integration. The theoretical framework focuses on three dimensions: Citizenship, Identity and Segregation.

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