Sök:

Sökresultat:

259 Uppsatser om Substance - Sida 15 av 18

Kaliumgödsling på torvmark - effekt på tillväxten hos planterade granar (Picea abies)

Peat  lands  are  a  great  potential  resource  for  increased  forest  growth  in  Sweden, there  are  approximately  6.5  million  hectares  of  peat  lands,  whereof  around  70% produce less wood than one m3sk/ha and year and are therefore classed as forest waste  land.  There  are  over  200  000  hectares  of  peat  land  that  is  already  drained and  wooded,  and  that may  be  suitable  for  fertilization.  Forest  production  on  peat soils  usually  requires  drainage  and  fertilization.  Dewatering  requires  ditching  the area, so that the roots can have access to oxygen. Nitrogen is often abundant in the peat but other nutrients; especially potassium is in short supply. The  purpose  of  this  work  was  to examine  the effects  of  potassium  fertilization  on the  growth  of  spruces  that  were  planted  on  drained  peat  land  and  how  different amount of fertilizers affects the growth. Potassium deficiency is strongly growth inhibiting, since potassium is important for Substance  transport  in  the  tree.  Potassium  is  also  important  for  the  carbohydrate formation, and because increasing the sugar content of the cells constitutes a lower freezing temperature does potassium availability in the soil play a major role in the winter  resistance  of  many  species.  Potassium  is  not  found  in  any  organic compounds in the tree, but is present in cell and tissue fluids. A fertilization trial was started in 1978 in Siljansfors Experimental Forest. The plots in the experiment were fertilized with different amounts of potassium and one plot was  left  without  fertilization.  All  plots  that  were  fertilized  with  potassium  grew considerably better than the unfertilized plot. The difference in production between the unfertilized plot and the plot that received the most potassium was 7.2 m3sk/ha and year. The unfertilized plot can still be classified as waste land. The theoretical production capacity was estimated using a Swedish system for site quality  estimation  of  wetlands  after  ditching  (dikningsbonitering).  The  plot  with most  potassium  produced  after  fertilizationaproximately  in  level  with  theoretical estimations.  Key  words:  Peat  land,  Fertilization,  Ditching,  Growth,  site  quality..

"Du måste helt enkelt äga ditt klassrum" : En studie om lärares ledarskap och strategier i mötet med störande elever

The title, ?You simply must own your classroom?, is taken from a quote from one of my informants.After review of earlier research on how teachers handle their leadership in the meeting with disturbing pupils and which strategies they use to solve problems in the classroom, interesting questions developed. What experiences do teachers have of disturbing situations in the classroom? Which strategies do they use to solve the problems? What kind of support do the teachers consider necessary in teaching? Are there any differences in teachers? experiences and strategies between the two selected schools? The study is supported by earlier research that deals with pupils? and teachers? perspective and strategies in different classroom cultures in terms of norm-breaking behaviour of pupils. The study is also supported by three different theoretical perspectives such as power structure, social order/disorder and support strategies.I conducted the study through interviews with sex teachers who work in the same municipality but in two separate schools.

Manligt och kvinnligt missbruk - Livshistorier om vägen in, tiden under och vägen ut ur missbruk.

Alcohol and drug abuse is something that undoubtedly exists in our society today. Our interest in this area was inspired by an earlier study of the influence of socialization on these dependencies. From this we developed new hypotheses concerning men and women?s drug and alcohol abuse. The main purpose of this study was to highlight the experiences and reflections of six women and seven men on their own alcohol or drug abuse.

Hur påverkar johannesört farmakokinetiken utav warfarin, ciklosporin, digoxin, preventivmedel och teofyllin? Vad har detta för klinisk betydelse?

St. John?s wort extract is composed of a large number of components, about 150, but the most studied and interesting Substance are hyperforin and hypericin. The herb is very popular and it is known for its pharmacological efficacy in numerous disorders. It is used for treatment of mild to moderated depression as an alternative to synthetic antidepressants.

Det kulturella tomrummet : En diskursanalys av kulturprojekt bland elever på särskilda ungdomshem

This essay deals with the rationale and aims for doing cultural or aesthetic activities and projects in schools, and gives special focus to a specific group of students, attending schools provided at special residential homes for young people (sa?rskilda ungdomshem). These homes receive young people with psychosocial and Substance misuse problems and who show tendencies towards criminal behavior. The essay investigates how working with a cultural project in schools at these residential homes is justified and also elucidates how this specific group of students and their problems are constructed in the documents surrounding the project. The essay will further ponder over possible educational and pedagogical consequences of these constructions.The investigation has its theoretical frame work in curriculum theory.

Utvärdering av stödgruppsverksamhet för barn och ungdomar som växer upp riskmiljöer

ABSTRACTBackground: Children and adolescents growing up in families where parents have serious problems are exposed to an increased risk of developing poor mental or physical health themselves. In a support group work they can meet other children in the same situation, receive help and support to process their emotions and manage their everyday life.Aim: To investigate if support group work at Trappan can reduce the psychological problems load and increase the experience of life quality, hopefulness and optimism in children and adolescents growing up in families where either addiction or mental illness occur in one of the parents. The purpose was also to investigate if there was any difference between these both child groups regarding psychological problems load, experience of life quality, hopefulness and optimism before and after support group participation.Method: Questionnaire study on children and adolescents of parents with addiction or mental illness. The children participated in support group work at Trappan. The measuring?s were conducted before and after support group participation.Results: In both groups an increased life quality in connection to finished support group participation was observed.

Beräkning av ASME-flänsar enligt EN-standard

In this thesis, a transparent model of the human head has been constructed which was filled with a Substance that represented the brain. This model was later crash tested. This was done in order to examine how a transparent model of the human head can be constructed to generate accurate data from crash tests. It was also done in order to examine how impacts on the front of the head can deform the rear of the brain. When a head is decelerating, the brain moves forward inside the skull and may hit the front of the skull.

Att arbeta med webbaserad sfi-undervisning : Sfi-elevers syn på internetbaserad undervisning som komplement till lärarledda lektioner

What are the basic thoughts formulated in the Heraclitean fragments? A cosmology, a philosophy of nature, the idea that all can be reduced to a single Substance? There is always a risk that Heraclitus is fitted into a thought pattern he doesn?t belong to, if we ? from our present horizon ? focus on continuity in an attempt to frame his thinking as part of an overall progress, running from the so-called pre-Socratics to Aristotle, in the history of philosophy. If we picture the dawn of Western civilization as an early development of scientific thinking, built on a gradual and continuous growth of knowledge, we will easily go astray as we try to discover the Greek origins of philosophy. Assuming, for example, that the readings of Heraclitus as a natural philosopher have come to a dead end, can we approach the fragments from a different angle?The aim of this paper is not to give a systematized reading of all the remaining fragments of Heraclitus, but neither to necessarily contradict the various interpretations that emphasise how these shattered remains reflect a coherent philosophy.

Lokal anpassning och implementering av Operation Management System

In this thesis, a transparent model of the human head has been constructed which was filled with a Substance that represented the brain. This model was later crash tested. This was done in order to examine how a transparent model of the human head can be constructed to generate accurate data from crash tests. It was also done in order to examine how impacts on the front of the head can deform the rear of the brain. When a head is decelerating, the brain moves forward inside the skull and may hit the front of the skull.

Energy efficient storage of biomass at Vattenfall heat and power plants

Storage of biomass is often associated with problems such as heat development, dry matter losses and reduction of fuel quality. The rise in temperature can potentially cause a risk of self-ignition in the fuel storage. Moreover, emissions from storage piles can cause health problems in the surrounding. The dry matter losses and reduction of fuel quality can have economical effects. The aim of this thesis project is to develop guidelines on how to store large amount of biomass at Vattenfalls heat and power plants in an optimal way.

Mekanisk modell av människans huvud för simulering av skalltrauma och hjärnskada

In this thesis, a transparent model of the human head has been constructed which was filled with a Substance that represented the brain. This model was later crash tested. This was done in order to examine how a transparent model of the human head can be constructed to generate accurate data from crash tests. It was also done in order to examine how impacts on the front of the head can deform the rear of the brain. When a head is decelerating, the brain moves forward inside the skull and may hit the front of the skull.

Solär Tragedi : Herakleitos Fragm 94

What are the basic thoughts formulated in the Heraclitean fragments? A cosmology, a philosophy of nature, the idea that all can be reduced to a single Substance? There is always a risk that Heraclitus is fitted into a thought pattern he doesn?t belong to, if we ? from our present horizon ? focus on continuity in an attempt to frame his thinking as part of an overall progress, running from the so-called pre-Socratics to Aristotle, in the history of philosophy. If we picture the dawn of Western civilization as an early development of scientific thinking, built on a gradual and continuous growth of knowledge, we will easily go astray as we try to discover the Greek origins of philosophy. Assuming, for example, that the readings of Heraclitus as a natural philosopher have come to a dead end, can we approach the fragments from a different angle?The aim of this paper is not to give a systematized reading of all the remaining fragments of Heraclitus, but neither to necessarily contradict the various interpretations that emphasise how these shattered remains reflect a coherent philosophy.

Bevattning av lagrat virke vid svensk skogsindustri : omfattning och miljökonsekvenser

Most of the saw and pulp industries have stored wood nearby their production, the main reason is to have a continuous wood flow to the production. Wet storage of wood is of great importance to keep the wood quality. Without water sprinkling the risk of drying outand decomposition through biological activity increases significantly and will result in a negative effect on future production and quality. One drawback of wet storage of wood is the leaching of chemical Substances into the surrounding recipient. The log yard run-off contains phosphorus, nitrogen, phenols and organic Substances. These Substances can cause problems for the surrounding environment. The main objective of this project is to gain an understanding of the wet storage used by the Swedish wood industry and estimate the environmental consequences that run-off water will have on the recipient.

Företagsförvärv : En studie av onoterade små och medelstora företag

Sweden is facing a shift in generation where the people born in the 1940s are starting to retire which results in consequences. Before the year of 2013 more than 180 000 companies will have to change owner. A study indicates that the majority of all Swedes in the age of 18-70 can consider becoming company owners.Only ten percent of the companies for sale will reach the company broker and another 15 percent will be mediated by legal experts and accountants. This means that 75 percent of the companies for sale will not be available for the public market. As a potential buyer this is a problem.

Tjustempiren : fallstudier av Casimirsborg och Blekhem

This paper concerning the regional architectural term known as the Tjust Empire style analyses manor houses built in the Tjust area by the east coast of Småland in the period 1810-1860. The term Tjust Empire style was invented in 1937 by PhD. Manne Hofrén in his dissertation on architecture in Kalmar län in the period 1650-1850. The aim of the paper is firstly to determine whether there is a distinct difference between the regional Tjust Empire style in architecture and the common Swedish empire style or as its Swedish equivalent is known; the Karl Johan style. Secondly, the paper strives to analyse why and how the Empire style became so popular in the area during this period, focusing on architecture as a means to express social identity and status.

<- Föregående sida 15 Nästa sida ->