Sök:

Sökresultat:

331 Uppsatser om Sediment sampling - Sida 16 av 23

Miljökonsekvenser av dagvattendamm i Skebäck, Örebro : en fallstudie hur miljöpåverkan av en dagvattendamm intill ett Natura 2000-område kan bedömas

Stormwater is surface runoff water that originates from precipitation or snowmelt and that on hardened surfaces prevents to infiltrate the ground. In city areas stormwater can consists of major amounts pollutants and when reaching a lake or watercourse it can cause damages on vegetation and animals. Therefore it is important to treat polluted stormwater before it reaches the recipient. The municipality of Örebro have since the 90ies an extensive work with treatment of stormwater in sedimentation ponds. A new stormwater treatment project is planned in an industrial estate in Skebäck, Örebro.

Avvattning av torv i samband med marksanering

Marksaneringar görs idag i syfte att förhindra spridning av föroreningar till människa och miljö. Den vanligaste metoden för marksaneringar är att massor grävs upp och transporteras iväg för behandling. De flesta saneringar i Sverige görs i torra material såsom jord men även saneringar i sediment och andra blöta material genomförs. Vid sanering i blöta material avvattnas ofta materialet för att minska kostnader i samband med transport och förbränning. Ett material som hög förmåga att binda metalljoner och som dessutom kan hålla kvar mycket vatten är torv.

Diurnal rhythm of the savannah elephant (Loxodonta africana africana) in Maasai Mara National Reserve, Kenya

Elephants are hindgut fermenters, which affects their diurnal rhythm. To reach their nutrient demands, elephants must eat almost constantly throughout the light part of the day. Sexual dimorphism may also affect their behavioral patterns. To understand the elephants' normal living habits and foraging behaviour, we conducted a pre-study in the Mara Triangle, the north-western part of the Maasai Mara National Reserve. Each of four to six observers randomly chose a focal animal within the group of elephants by the criteria that they were adults and visible.

Visbys färger : exteriör färgsättning av bostadshus i Visby innerstad 1860?1930

The main aim of this research is to survey the general colour scheme for private dwellings inVisby, built 1860?1930. During this period the visual appearance of the town of Visby changedsubstantially, since the increased local production of lime led to the plastering of many woodenbuildings. Which colour schemes were chosen for the different building types of the historic centreof Visby, and which colours came to dominate the time period? The methods used for answeringthese questions have partly been field studies on site and sampling of selected buildings, andpartly critical reading and observation of iconographic material (paintings, drawings, aquarelles,postcards and photographs).

Kvinnor, kriminalitet och könsmaktsordning : En kvalitativ studie om återanpassningsarbete på Färingsöanstalten ur ett genusperspektiv

This thesis explore women?s needs when reentering society after having served a sentence at the female prison Färingsö, outside Stockholm and whether those needs are being met in the reentry strategies that are being provided. Parallel to this the thesis also examines if there, based on nonconformity and gender theories, is a socially constructed representation of women maintained in the rehabilitation work.The method of this thesis applied semi-structured interviews and used snowball sampling to expand the network of informants to obtain the data necessary. Totally five interviews were carried out. Previous research has shown that women in prison have much more complex problems than men and that there is a need for reentry strategies that take gender in account.The results showed that in terms of being able to reenter back in society, women needed help to structure a previously chaotic life.

Dairy fat biomarkers and cardiometabolic health

Commonly held dietary guidelines discourage full-fat dairy consumption due its to high levels of saturated fatty acids, which are believed to aversely influence cardiovascular disease risk. Cardiovascular diseases cause more than one third of deaths in the developed world. With dairy often providing a large part of energy and nutrients in Western diets, research into its effects on human health is warranted. Several recent studies have suggested a protective role of dairy in the development of cardiometabolic disease. However, many of these have used imprecise methods of dietary assessment, based on questionnaires or interviews. Biomarkers are emerging as a means of evaluating diet in a more objective way. Currently used dairy fat biomarkers are minor fatty acid constituents of dairy that preferably are unique to dairy and not influenced by endogenous metabolism.

Vibrio vulnificus : ett framtida hot?

Vibrio vulnificus är en halofil bakterie, som framförallt har hittats längs med Golfkusten i USA och i flera asiatiska länder. Den kan orsaka gastroenterit, sepsis eller sårinfektioner och medför en hög mortalitet. I USA står den för en stor del av de skaldjursassocierade dödsfallen. Såväl ostron, fisk och musslor som sediment, vatten och plankton har i olika studier beskrivits som reservoarer för V. vulnificus.

Minkvalpars beteende i större berikade burar vid olika gruppstorlek :

Farmed mink often perform stereotypic behaviours which is considered to be a sign of reduced welfare. Previous studies have shown that enriched cages can reduce the frequency of performed stereotypies. Most studies on mink in Sweden have been done on adults. The aim of this study was to investigate if larger enriched cages with two or four mink kits reduce stereotypies in mink kits during their growth period in comparison to traditional cages. In the present study the behaviours of mink kits that were kept in four different treatments at a private mink farm were recorded. Traditional cages with two mink kits were used as a reference and the other treatments consisted of larger cages with shelves with two kits, larger cages with shelves and a plastic cylinder with two kits, and larger cages with shelves with four kits.

ALK?RR - K?LLA ELLER S?NKA F?R V?XTHUSGASERNA METAN OCH LUSTGAS? Empirisk studie av v?xthusgasutbyte i kustn?ra alk?rr p? den svenska V?stkusten.

Due to global climate change and the rising levels of greenhouse gases (GHG) in the atmosphere, the interest for seeking solutions for mitigation has increased. While much attention has been directed towards technical solutions such as carbon capture and storage (CCS), biogenic carbon sinks has also garnered significant attention. Previous studies have shown that coastal ecosystems such as seagrass meadows and mangroves have a much greater capacity for storing carbon (C) compared to terrestrial ecosystems. That raises the question if other coastal ecosystems, such as coastal wetland forests, that previously haven?t been considered as blue carbon habitats also contribute to coastal carbon sink capacity.

Traktkilars inverkan på hovens glukos- och laktatmetabolism :

The equine hoof is often manipulated in purpose to achieve a better stride or to reduce the weight on damaged tissue. The living tissue in the hoof can?t store energy as glycogen and is therefore depending on a continuous supply of glucose for its energy production. The purpose of the study was to determine if wedging (i.e. elevating) the heel could influence the hooves glucose and lactate consumption/production. Five standardbred horses were trained to trot on a treadmill without getting physical or mentally tired.

Inclusion Body Disease hos boa- och pytonorm : diagnostiska metoder

Inclusion body disease (IBD) affecting boas and pythons is a serious and common disease. Boas can be clinically healthy carriers, which makes control of the disease difficult. The causative agent has not yet been confidently identified, and therefore there are no serodiagnostic tests available. Today, histopathologic examination of tissue biopsies is the recommended antemortem diagnostic method, but there are several disadvantages. The objective of this study was to compare the sensitivity of two diagnostic methods ? liver biopsies and blood smears, and to evaluate ultrasoundguided needle biopsy of the liver.

Nästa generations syn på skogsägandet och skogsägarrörelsen : en enkätundersökning bland vuxna barn till dagens medlemmar i Norra Skogsägarna

The future of the forest owners? associations are intimately coupled to the development in family forestry. Forecasts have been made that predicts that the number of forest properties for sale on the open market will increase as the interest among the children of the property owners is considered to decrease. The associations are also affected by continuing individualism in the society which may affect attitudes to as well as interest in membership. The objective of this study was to study the attitudes among grown-up children of members in a forest owners association towards overtaking the forest property as well as membership in a forest owners association.

Fruktsamhet och fruktsamhetsproblem hos chow-chow : En inledande studie över situationen i Sverige

The chow-chow breed is considered to have a low fertility and this report is an in depth study of the reproductive functions of this breed in Sweden. Only 53 % of the Chow-chow matings results in litters. Previous studies of other breeds in commercial kennels shows mating results around 85-90 %, but this has not been investigated in hobby kennels and most Chow-chows which are bred from in Sweden, are kept as family pets. Contrary to most other breeds, Chow-chows show a seasonal reproductive pattern and most litters are born in the autumn. The influence of the month of mating on pregnancy rate and litter size was found to be not significant, but can be considered a trend. Thirty-nine females with previous known fertility problems where studied. Some of them had reached puberty extremely early, at an age between 4-5 months, and many of the bitches showed great fluctuations in intervals between oestrus cycles. Some of the females showed abnormalities such as very short oestrus intervals of only 2-3 months, probably without ovulating.

Övergödningen av sjön Anten - en underlagsrapport för Alingsås kommun

I och med den tillväxtprognos som Göteborgs Stad har så kommer även godstransporterna attöka. Syftet med studien är därför att identifiera slöserier i kommersiell godstrafik med hjälp avLean Productions 7 + 1 slöserier. Slöserierna skall sedan anpassas för att kunna framställas i enLeanbaserad slöserimodell för den kommersiella godstrafiken. Dessa kommer sedan teoretisktatt effektiviseras eller elimineras. Tillvägagångssättet har bestått av kvalitativa observationer,intervjuer samt teoriinsamling.Lean Production är ett produktionssystem och synsätt framtaget av Japanska företaget Toyota.Dess två huvudprinciper är att företagen alltid ska respektera människor och sina medarbetaresamt ständigt jobba med förbättringar för att bli så effektiva och produktiva som möjligt.Förbättringarna sker i form av att identifiera Leans 7+1 slöserier för att därefter reducera ellereliminera dem.Studiens resultat är häpnadsväckande hur ineffektiva vissa transporter är.

Modellerade och uppmätta kväveflöden i energiskog som bevattnas med avloppsvatten

The aim of this essay was to study the nitrogen flow in two willowplantations, at different locations in the south of Sweden, that wereirrigated with sewage. The study was also performed to compare thedifferences in nitrogen flows between two years, 1998 and 1999. The studywas made in three parts. First, the denitrification activity was measuredusing the acetylen inhibition method. Second the nitrogen flow, as well asthe water- and heat flows, were modeled through the SOIL-SOILN-modelThird; the nitrogen flow was calculated to compare with the results fromthe model.The results from the measurements were then compared with the resultsfrom the SOILN-simulations to detect differences in the denitrificationrate.

<- Föregående sida 16 Nästa sida ->