Tidigt fullständigt svenskt språkbad i Esbo

Avhandlingen behandlar tidigt fullständigt svenskt språkbad i Esbo. Arbetet utreder vad tidigt fullständigt språkbad innebär samt vad språkbadsföräldrars och språkbadslärares åsikter om språkbadet i Esbo är. Undersökningen omfattar 60 familjer samt samtliga lärare (14 st) som arbetar med språkbad i Esbo. Undersökningen består av två enkäter; en till språkbadsföräldrar och en tillspråkbadslärare. Av de 60 enkäter som sändes ut till språkbadsföräldrarna besvarades 45, dvs. 75%. 12 lärare av 14, dvs. 86%, besvarade den andra enkäten. Det är viktigt att känna till centrala begrepp i anslutning till tvåspråkighet, då man talar om andraspråkstillägnandet i språkbad. I detta arbete presenteras en modell (Sahi, 1999) som åskådliggör centrala begrepp i anslutning till tvåspråkighet. Tidigtfullständigt språkbad är ett program som är planerat att omfatta hela grundskolan. Språkbad är ämnat för enspråkiga majoritetsbarn i ett tvåspråkigt land. Dessa barn tillägnar sig minoritetsspråket i skolan. Språkbadet är inte enbart ett program, utan även en metod. Skillnaden mellan språkbad och traditionell undervisning i språk är att man i språkbadet betonar kommunikation framom grammatik. Målet medspråkbadet är funktionell tvåspråkighet. Många faktorer inverkar på andraspråkstillägnandet i språkbadet. I detta arbete betonas attitydernas och motivationens betydelse. Språkbad kräver en medveten och aktiv insats av föräldrarna. Vidare betonar litteraturen som behandlar språkbad undervisningsmetodernas betydelse samt språkbadslärarens viktiga roll. Föräldrarna är nöjda med språkbadsprogrammet, eftersom det givit goda resultat och motsvarat förväntningarna. Enligt föräldrarna är språkbad ett mjukt, modernt och effektivt program. Föräldrarna anser att barnen lär sig badspråket på ett naturligt sätt och även får en öppnare inställning till språk och kulturer. Föräldrarna betonar lärarnas viktiga insatser samt kontinuitetens betydelse. Vidare tycker föräldrarna att språkbadet borde inledas i ett tidigare skede och att eleverna borde ha mera kontakt med badspråket utanför skolan. Målet med att barnen går i språkbad är, enligt föräldrarna, att barnen ska förstå och tala språket flytande samtkänna kulturen som hör ihop med språket. Både föräldrarna och lärarna tycker att språkbadsklasserna är för stora och att det är brist på material. Lärarna anser att man mer än tidigare borde informera allmänheten, beslutsfattare samt föräldrar om verksamheten. Därtill tycker lärarna att samarbetet mellan daghem och skola samt specialundervisningen borde utvecklas. Lärarna betonar att språkbad inte lämpar sig för alla barn. Lärarna anser sig främst behöva praktiska råd av andra som arbetar med språkbad samt teoretisk kunskap. Både föräldrarna och lärarna tycker att språkbadsverksamheten i Esbo borde koordineras och att språkbadselevernas prestationer noggrant borde följas upp. Nyckelord: Tvåspråkighet, Språkbad, Andraspråkstillägnande Keywords: Bilingualism, Immersion, Second Language Aquisition.

I konstens namn - scenen som arbetsmiljö : Arbetsplatsmobbning ur skådespelarperspektiv

Workplace bullying is a topic of current interest in Finland. Workplace bullying is found in all professions, including the artistic ones. This thesis aims to explore workplace bullying from the view of the Finland-Swedish actors as a phenomenon that within dramatic art is difficult to define due to the fact that the body and emotions of an actor constitute his or her working tools. The research aims to deepen the understanding of the actors’ working situation, and particularly of the difficulties and problems actors face when exercising their job. The research problems are: What forms of bullying are the actors exposed to? Who is bullying? How is the bullying received by the actors, and what are the possible consequences? The theoretical orientation of this thesis is based upon dialogical philosophy where phenomenology, hermeneutics and dialog meet in an orientation where the unseen is emphasized and made visible. Artistic leadership should be based upon a pedagogic understanding that by an open and equal dialog with the Other recognizes human diversity. The narrative research was undertaken by using an interview guide for the interviews with eleven actors, six women and five men with the voice of a sixth man represented by an article. The interviews, each on average 118 minutes, were recorded and transcribed. The method of discursive analysis was initiated by numerous reflective readings based on analytic induction. The inductive part of the analysis consisted of mapping out the individual experiences of bullying where after the process of finding connecting common features in the extensive material took place. The coded data was then deductively grouped together according to the research problems, and subgroups were formed for deeper description. The research findings show that workplace bullying is an everyday occurrence within the field of dramatic art. Actors are bullied by theatre managers and directors as well as by colleagues and other personnel. The main areas of bullying is depreciation of one’s professional skills, the existing jargon, sexual harassment, collective bullying and bullying because of personal qualities. A significant finding concerning this problem was the existing culture of silence. Even if actually seeing and hearing a colleague being bullied, few stood up to defend the person being bullied because of fear of retaliation. Even the person actually being the object for bullying found it difficult to take any actions.

Datorstödda studier i hälso- och socialvård : MuPSiNet-projektet

The aim of the study was to explore why the MuPSiNet project - a computer and network supported learning environment for the field of health care and social work - did not develop as expected. To grasp the problem some hypotheses were formulated. The hypotheses regarded the teachers' skills in and attitudes towards computing and their attitudes towards constructivist study methods. An online survey containing 48 items was performed. The survey targeted all the teachers within the field of health care and social work in the country, and it produced 461 responses that were analysed against the hypotheses. The reliability of the variables was tested using the Cronbach alpha coefficient and t-tests. Poor basic computing skills among the teachers combined with a vulnerable technical solution, and inadequate project management combined with lack of administrative models for transforming economic resources into manpower were the factors that turned out to play a decisive role in the project. Other important findings were that the teachers had rather poor skills and knowledge in computing, computer safety and computer supported instruction, and that these skills were significantly poorer among female teachers who were in majority in the sample. The fraction of teachers who were familiar with software for electronic patient records (EPR) was low. The attitudes towards constructivist teaching methods were positive, and further education seemed to utterly increase the teachers' readiness to use alternative teaching methods. The most important conclusions were the following: In order to integrate EPR software as a natural tool in teaching planning and documenting health care, it is crucial that the teachers have sufficient basic skills in computing and that more teachers have personal experience of using EPR software. In order for computer supported teaching to become accepted it is necessary to arrange with extensive further education for the teachers presently working, and for that further education to succeed it should be backed up locally among other things by sufficient support in matters concerning computer supported teaching. The attitudes towards computing showed significant gender differences. Based on the findings it is suggested that basic skills in computing should also include an awareness of data safety in relation to work in different kinds of computer networks, and that projects of this kind should be built up around a proper project organisation with sufficient resources. Suggestions concerning curricular development and further education are also presented. Conclusions concerning the research method were that reminders have a better effect, and that respondents tend to answer open-ended questions more verbosely in electronically distributed online surveys compared to traditional surveys. A method of utilising randomized passwords to guarantee respondent anonymity while maintaining sample control is presented. Keywords: computer-assisted learning, computer-assisted instruction, health care, social work, vocational education, computerized patient record, online survey

Nephrin and the Pathogenesis of Nephropathy - Emphasis on Type I Diabetes

End-stage renal disease is an increasingly common pathologic condition, with a current incidence of 87 per million inhabitants in Finland. It is the end point of various nephropathies, most common of which is the diabetic nephropathy. This thesis focuses on exploring the role of nephrin in the pathogenesis of diabetic nephropathy. Nephrin is a protein of the glomerular epithelial cell, or podocyte, and it appears to have a crucial function as a component of the filtration slit diaphragm in the kidney glomeruli. Mutations in the nephrin gene NPHS1 lead to massive proteinuria. Along with the originally described location in the podocyte, nephrin has now been found to be expressed in the brain, testis, placenta and pancreatic beta cells. In type 1 diabetes, the fundamental pathologic event is the autoimmune destruction of the beta cells. Autoantibodies against various beta cell antigens are generated during this process. Due to the location of nephrin in the beta cell, we hypothesized that patients with type 1 diabetes may present with nephrin autoantibodies. We also wanted to test whether such autoantibodies could be involved in the pathogenesis of diabetic nephropathy. The puromycin aminonucleoside nephrosis model in the rat, the streptozotocin model in the rat, and the non-obese diabetic mice were studied by immunochemical techniques, in situ -hybridization and the polymerase chain reaction -based methods to resolve the expression of nephrin mRNA and protein in experimental nephropathies. To test the effect of antiproteinuric therapies, streptozotocin-treated rats were also treated with aminoguanidine or perindopril. To detect nephrin antibodies we developed a radioimmunoprecipitation assay and analyzed follow-up material of 66 patients with type 1 diabetes. In the puromycin aminonucleoside nephrosis model, the nephrin expression level was uniformly decreased together with the appearance of proteinuria. In the streptozotocin-treated rats and in non-obese diabetic mice, the nephrin mRNA and protein expression levels were seen to increase in the early stages of nephropathy. However, as observed in the streptozotocin rats, in prolonged diabetic nephropathy the expression level decreased. We also found out that treatment with perindopril could not only prevent proteinuria but also a decrease in nephrin expression in streptozotocin-treated rats. Aminoguanidine did not have an effect on nephrin expression, although it could attenuate the proteinuria. Circulating antibodies to nephrin in patients with type 1 diabetes were found, although there was no correlation with the development of diabetic nephropathy. At diagnosis, 24% of the patients had these antibodies, while at 2, 5 and 10 years of disease duration the respective proportions were 23%, 14% and 18%. During the total follow-up of 16 to 19 years after diagnosis of diabetes, 14 patients had signs of nephropathy and 29% of them tested positive for nephrin autoantibodies in at least one sample. In conclusion, this thesis work could show changes of nephrin expression along with the development of proteinuria. The autoantibodies against nephrin are likely generated in the autoimmune process leading to type 1 diabetes. However, according to the present work it is unlikely that these autoantibodies are contributing significantly to the development of diabetic nephropathy.

Skogsbränslets elementära sammansättning med tanke på förbränningsprocessen och för näringsämnesförluster i ekosystemet

There are several reasons for increasing the usage of forest biomass for energy in Finland. Apart from the fact that forest biomass is a CO2 -neutral energy source, it is also a domestic resource distributed throughout the country. Usage of forest biomass in the form of logging residues decreases Finland’s dependence of energy import and increases both incomes and employment. Wood chips are mainly made from logging residues, which constitute 64 % of the raw material. A large-scale use of forest biomass requires heed also to the potential negative aspects. Forest bioenergy is used extensively, but its impacts on the forests soil nutrition and carbon balance has not been studied much. Nor have there been many studies on the heavy metal or chlorine content of logging residues. The goal of this study was to examine the content of carbon, macronutrients, heavy metals and other for the combustion harmful substances in Scots pine and Norway spruce wood chips, and to estimate the effect of harvesting of logging residues on the forests carbon and nutrient balance. Another goal was to examine the energy content of the clear cut remains. The Wood chips for this study were gathered from pine and spruce dominated clear cut sites in southern Finland, in the costal forests between Hankoo and Siuntio. The number of sample locations were 29, and the average area was 3,15 ha and the average timber volume 212,6 m3 ha -1. The average logged timber volume was for Scots pine timber 70 m3 ha -1 and for Norway spruce timber 124 m3 ha -1 and for deciduous timber (birch and alder) 18,5 m3 ha -1. The proportion of spruce in the logging residues and the stand-volume were relevant for how much nutrients were taken from the forest ecosystem when harvesting logging residues. In this study it was noted that the nutrient content of the logging residues clearly increased when the percentage of spruce in the timber volume increased. The S, K, Na and Cl -contents in the logging residues in this study increased with an increasing percentage of spruce, which is probably due to the fact that the spruce is an effective collector of atmospheric dry-deposition. The amounts of nutrients that were lost when harvesting logging residues were less than those referred to in the literature. Within a circulation period (100 years), the forest soil gets substantially more nutrients from atmospheric deposition, litter fall and weathering than is lost through harvesting of logging residues after a clear cut. Harvesting of the logging residues makes for a relatively modest increase of the quantity of carbon that is removed from the forest compared to traditional forestry. Due to the fact that the clear cut remains in my study showed a high content of chlorine, there is a risk of corrosion in connection to the incineration of the logging residues in power plants especially at coastal areas/forests. The risk of sulphur -related corrosion is probably rather small, because S concentrations are relatively low in woodchips. The clear cut remains showed rather high heavy metal contents. If the heavy metal contents in this study are representative for the clear cut remains in the coastal forests generally, there might be reason to exert some caution when using the ash for forest fertilizing purposes.

Lätta stabila isotopfraktioner som verktyg i biologisk forskning

Det finns en mätbar entitet i all levande materia, nämligen förhållandet mellan ett atomslags lätta och tunga isotop. Denna entitet divideras med en definierad referens och ett värde erhålls som brukar anges i promille ( ). Värdet är ett mått på isotopfraktionering. Genom att studera ekologi, taxonomi, kretslopp, isotopeffekter, dokumenterad data och metabola effekter kan man skissera över vad isotopfraktionen betyder. Migrationsbeteende, trofinätverk, dieter, miljö- och klimatdata kan rekonstrueras i tid och rum. Vid rekonstruktioner av gången tid har de museala samlingarna en nyckelposition. I litteraturöversikten tas teori, praktik och forskning upp för att påvisa metodens faror och användningsområden.

Traditionally Protected Forests and Sacred Forests of Zigua and Gweno Ethnic Groups in Tanzania

In Tanzania, indigenous forests can still be found whose existence is based on the management systems of precolonial society. This study covers material from over 900 forests. There are similar types of forests elsewhere in Africa, and similar forests can also be found in indigenous cultures on every continent. In this study they are called traditionally protected forests (TPFs). They have a high level of endemism and a rich biodiversity. The field study was carried out during the years 1997-2003 using participatory methods. An active debate is going on concerning the capacity of local communities to manage their environment. The role of indigenous people and their institutions in the development of the physical environment is a central issue in the debate. This study discusses the opportunities that the local people have had to decide on how to conserve, maintain, utilise, and manage their environment during different political periods. The study explains what kinds of changes have taken place in these forests and institutions in northeastern Tanzania among the matrilinear Zigua and patrilinear Gweno ethnic groups. About 2% of the land area of the communities was still protected by the precolonial structures. The communities have established their protection systems for different reasons, not only because of their beliefs but also because of different secular and clearly environmentally motivated reasons. There are different TPF types. Less than half of them are directly related to spirituality, and more than half are not. In earlier research elsewhere, it has been commonly understood that spiritual reasons played the main role in the protection of these environments. This study is also part of the postcolonial geographical discussion on the precolonial landscape and environmental management which was started by Carl Sauer. In the Zigua case study villages, only two out of five first comer clans have performed rain rituals in the past 30 years. Many of the most respected sacred sites do not have a ritual maker or even a person who knows how to perform rituals any longer. The same is happening with male initiation rites. In all case study villages there have been illegal cuts in the TPFs, but variations can be seen between the communities. The number of those who neither respect indigenous regulations nor accept indigenous penalties is growing. Positive developments have also taken place. Nowadays, the Forest Act of 2002 is in effect, which works as a cornerstone of community-based land ownership and also allows elders to protect TPFs, and by-laws are created with the support of different projects. Moreover, during the field study it was found that many young people are ignorant about their village's TPF sites, but interested in learning about their history and values.

Användning av tidigare frågor vid frågeutvidgning i informationssökning

Ett sätt att förbättra resultat i informationssökning är frågeutvidgning. Vid frågeutvidgning utökas användarens ursprungliga fråga med termer som berör samma ämne. Frågor som har stort likhetsvärde med ett dokument kan tänkas beskriva dokumentet väl och kan därför fungera som en källa för goda utvidgningstermer. Om tidigare frågor finns lagrade kan termer som hittas med hjälp av dessa användas som kandidater för frågeutvidgningstermer. I avhandlingen presenteras och jämförs tre metoder för användning av tidigare frågor vid frågeutvidgning. För att evaluera metodernas effektivitet, jämförs de med hjälp av sökmaskinen Lucene och en liten samling dokument som berör cancerforskning. Som jämförelseresultat används de omodifierade frågorna och en enkel pseudorelevansåterkopplingsmetod som inte använder sig av tidigare frågor. Ingen av frågeutvidgningsmetoderna klarade sig speciellt bra, vilket beror på att dokumentsamlingen och testfrågorna utgör en svår omgivning för denna typ av metoder.

Kutsu kuuliaisuuteen : James I. Packerin liittonomistinen raamattukäsitys

This dissertation examines James I. Packer s view of the Bible as the book of God s revelation. However, this study could not be complete without discussion of his background ideas about God, man and the foundations of theology. The research method used in this dissertation is systematic analysis. I analyse key theological concepts in the data, such as inerrancy, God s word and the covenant of grace, and examine Packer s concepts primarily in the context of the reformed tradition that he represents. Although the dissertation presents the philosophical premises of Packer s thought, the focus is on an analysis of theological concepts. Packer claims to approach theological issues broadly and to reject legalism. However, he also considers Calvinist thinking to be best suited to theological work and emphasises the central role of law in his view of the Bible. My dissertation pays particular attention to the status of law in Packer s theology and especially in the covenant of grace. The dissertation shows that the fundamental theological structure of Packer s view of the Bible is based on Puritan covenant theology, which consists of the temporally successive covenant of works and covenant of grace. Covenant theology stresses the connection and friendship between God and man. Man s highest goal according to the Westminster Confession of Faith (1647) is to glorify the triune God and to rejoice in him for all eternity. After the fall of man, this friendship between God and man can only take place in the covenant of grace. For Packer, the covenant of grace encompasses not only the time of the Gospel, but also the time of the law before the Gospel. Consequently, the covenant of grace incorporates in its very essence the demand of obedience to God s law. Covenant theology forms the foundation for both his view of the Bible and his idea that a believer lives in a covenant of grace, the key aspects of which are God s commandments and man s works. Law and the Gospel are not considered fundamental opposites in the covenant of grace, unlike in justification. In the covenant of grace, man has become God s friend who obeys the law as the law of Christ in a way which differs from Luther s view of obedience to the faith . For Packer, covenant theology is a Puritan instrument to link predestination and sanctification. Works committed in obedience show that the believer belongs to the covenant of grace and will be among the saved. Although voluntary obedience to God s commandments is not a direct instrument to achieve salvation, it is a pivotal sign of predestination. God calls the predestined to salvation with an effectual calling, the reliable message of the Bible. In sanctification, God guides a believer living in the context of covenantal nomism. In that sense, the Bible is above all an instrument of law guided by reason. In man s obedience, God completes man s nature and restores the imago Dei in man.

Viljan visar vägen till identiteten : Berättelsetyper och teman i livsberättelser av kvinnliga teologer i Svenskfinland

Forskningens utgångspunkt var att tillföra information om kvinnliga teologers liv i Svenskfinland under en period då kyrkan hade omdefinierat sin syn på kvinnor som präster. Till forskningens intresseområden hörde frågan om hur situationen hade påverkat kvinnors motivation att välja teologiska studier och yrken samt hur situationen hade inverkat på kvinnliga teologer i arbetslivet. Forskningens uppgift är att ur ett identitetsperspektiv undersöka målgruppens egna skildringar av livet som kvinnlig teolog i Svenskfinland. Forskningsfrågan delades in i två delfrågor: 1)Hur har kvinnliga teologer kommit att välja studier, yrken och arbetsplats? 2)Vad har kvinnliga teologer upplevt i sina studier och arbetsliv? Forskningens material samlades in hösten 2003 genom en förfrågan per brev och genom en tidningsnotis i tidningen Kyrkpressen. Materialet bestod av livsberättelser som kvinnliga teologer i olika yrkesgrupper hade skrivit utgående ifrån rubriken ”Mitt liv som kvinnlig teolog i Svenskfinland”. Cirka 250 kvinnor hade avlagt teologisk examen på svenska i Finland. Antalet personer som deltog i undersökningen med sin livsberättelse var 27. Materialet analyserades kvalitativt och induktivt med en narrativ analys som tog fasta på teman och berättelsetyper i olika livsskeden: val av studier, studietid, val av karriär och erfarenheter från arbetslivet. Analysresultatet var att studievalets beskrivning kunde tolkas som en valsituation där egenskaper jämfördes med yrkesrollen, som en socialisationsprocess, som ett alternativ till tidigare studieinriktning eller som en process där kvinnoprästdiskussioner, intresse för teologi och teologuppgifter fick informanten att välja teologin. Teman från studietiden handlade om studiers fördröjning, om yrkesinriktning, om studier som förberedelse för arbetslivet och om kvinnoprästdiskussionens inverkan på yrkesinriktningen. Val av arbetsplatser och yrken beskrevs utgående ifrån kvinnliga teologers förändrade position, moderskapets inverkan på karriären, en strävan att hitta en arbetsplats som passade informanten, erfarenheter från en enda arbetsplats och karriärsbyte. Lektorer tog fasta på välsignelseaktens betydelse, kyrkoherdens stora inflytande på arbetets karaktär samt hur situationen förändrades då kvinnor tilläts bli präster. För en del präster innebar prästrollen att andra människor betonade att de var kvinnor. Några informanter hade behov av stöd både från Borgå stifts ledning och från andra kvinnliga präster under den första tiden med kvinnliga präster. Till en början upplevdes ledningens stöd inte alltid som tillräckligt men det förbättrades med tiden. Informanterna berättade inte så mycket om läraryrket. Inom forskning verkade teologtiteln vara naturlig, medan informanter med erfarenhet av annat än teologyrken ibland hade stött på reaktioner på sitt yrkesval eller sin arbetsroll. Finlandssvenskheten upplevdes av olika informanter både som tryggt och inskränkt. Eventuella kontakter till finska stift upplevdes positivt även om det egna sammanhanget upplevdes som viktigt. Trivsel på arbetsplatsen orsakades av subjektiva belöningar och i en del fall av att arbetet motsvarade informantens yrkesinriktning. Att vara kvinnlig teolog innebar ibland att informantens yrkesval tolkades av andra som ett ställningstagande för någon ideologi i kvinnoprästfrågan.

Electron and proton transfer in NADH:ubiquinone oxidoreductase (Complex I) from Escherichia coli

Cells of every living organism on our planet − bacterium, plant or animal − are organized in such a way that despite differences in structure and function they utilize the same metabolic energy represented by electrochemical proton gradient across a membrane. This gradient of protons is generated by the series of membrane bound multisubunit proteins, Complex I, II, III and IV, organized in so-called respiratory or electron transport chain. In the eukaryotic cell it locates in the inner mitochondrial membrane while in the bacterial cell it locates in the cytoplasmic membrane. The function of the respiratory chain is to accept electrons from NADH and ubiquinol and transfer them to oxygen resulting in the formation of water. The free energy released upon these redox reactions is converted by respiratory enzymes into an electrochemical proton gradient, which is used for synthesis of ATP as well as for many other energy dependent processes. This thesis is focused on studies of the first member of the respiratory chain − NADH:ubiquinone oxidoreductase or Complex I. This enzyme has a boot-shape structure with hydrophilic and hydrophobic domains, the former of which has all redox groups of the protein, the flavin and eight to nine iron-sulfur clusters. Complex I serves as a proton pump coupling transfer of two electrons from NADH to ubiquinone to the translocation of four protons across the membrane. So far the mechanism of energy transduction by Complex I is unknown. In the present study we applied a set of different methods to study the electron and proton transfer reactions in Complex I from Escherichia coli. The main achievement was the experiment that showed that the electron transfer through the hydrophilic domain of Complex I is unlikely to be coupled to proton transfer directly or to conformational changes in the protein. In this work for the first time properties of all redox centers of Complex I were characterized in the intact purified bacterial enzyme. We also probed the role of several conserved amino acid residues in the electron transfer of Complex I. Finally, we found that highly conserved amino acid residues in several membrane subunits form a common pattern with a very prominent feature – the presence of a few lysines within the membrane. Based on the experimental data, we suggested a tentative principle which may govern the redox-coupled proton pumping in Complex I.

Should I stay or should I go? : Reproductive and dispersal strategies of site-specific liverwort species

The area of intensively managed forests, in which required conditions for several liverwort species are seldom found, has expanded over the forest landscape during the last century. Liverworts are very sensitive to habitat changes, because they demand continuously moist microclimate. Consequently, about third of the forest liverworts have been classified as threatened or near threatened in Finland. The general objective of this thesis is to increase knowledge of the reproductive and dispersal strategies of the substrate-specific forest bryophytes. A further aim was to develop recommendations for conservation measures for species inhabiting unstable and stable habitats in forest landscape. Both population ecological and genetic methods have been applied in the research. Anastrophyllum hellerianum inhabits spatially and temporally limited substrate patches, decaying logs, which can be considered as unstable habitats. The results show that asexual reproduction by gemmae is the dominant mode of reproduction, whereas sexual reproduction is considerably infrequent. Unlike previously assumed, not only spores but also the asexual propagules may contribute to long-distance dispersal. The combination of occasional spore production and practically continuous, massive gemma production facilitates dispersal both on a local scale and over long distances, and it compensates for the great propagule losses that take place preceding successful establishment at suitable sites. However, establishment probability of spores may be restricted because of environmental and biological limitations linked to the low success of sexual reproduction. Long-lasting dry seasons are likely to result in a low success of sexual reproduction and decreased release rate of gemmae from the shoots, and consequent fluctuations in population sizes. In the long term, the substratum limitation is likely to restrict population sizes and cause local extinctions, especially in small-sized remnant populations. Contrastingly, larger forest fragments with more natural disturbance dynamics, to which the species is adapted, are pivotal to species survival. Trichocolea tomentella occupies stable spring and mesic habitats in woodland. The relatively small populations are increasingly fragmented with a high risk for extinction for extrinsic reasons. The results show that T. tomentella mainly invests in population persistence by effective clonal growth via forming independent ramets and in competitive ability, and considerably less in sexuality and dispersal potential. The populations possess relatively high levels of genetic diversity regardless of population size and of degree of isolation. Thus, the small-sized populations inhabiting stable habitats should not be neglected when establishing conservation strategies for the species and when considering the habitat protection of small spring sites. Restricted dispersal capacity, also on a relatively small spatial scale, is likely to prevent successful (re-)colonization in the potential habitat patches of recovering forest landscapes. By contrast, random short-range dispersal of detached vegetative fragments within populations at suitable habitat seems to be frequent. Thus, the restoration actions of spring and streamside habitats close to the populations of T. tomentella may contribute to population expansion. That, in turn, decreases the harmful effects of environmental stochasticity.

Prevalence and determinants of respiratory symptoms, asthma, chronic bronchitis and allergic sensitization in Helsinki : A comparison between Finland, Sweden and Estonia. The FinEsS studies - Helsinki I

Objectives: To assess the prevalence and risk factor profiles of respiratory symptoms, asthma and chronic bronchitis in Helsinki, and to compare these results with those for Sweden and Estonia. Other important aims were to evaluate the prevalence and determinants of type 1 sensitization in Helsinki. Materials and methods: This presentation is a part of a large epidemiological study in Finland, Estonia and Sweden (FinEsS). The first part of the study consisted of a postal questionnaire in 1995-1996 distributed to subjects in eight study centres. The study population in each centre was a population-based random sample designed to be representative of the general population. The original study sample in Helsinki consisted of 8000 subjects aged 20-69 years, 6062 (76%) of whom participated. Comparisons between countries were based on a narrower age group, 20-64 years, since 64 years was the upper age limit used in the original study in Estonia. Thus, altogether 58 661 subjects aged 20-64 years were invited to participate in Finland, Sweden and Estonia, and 44 483 (76%) did so. The second part of the study was a clinical study with a structured interview, lung function measurements and skin-prick tests with 15 common allergens. This thesis reports only the results of the prick tests in Helsinki. Of the 1200 subjects invited to participate in Helsinki, 643 (54%) consented. Skin-prick tests were performed on subjects ≤ 60 years of age; thus, a total of 498 tests were done. Results: In Helsinki, the prevalence of physician-diagnosed asthma was 6.6% and of physician-diagnosed chronic bronchitis 3.7% among subjects aged 20-69 years. Comparison of the results between Finland, Sweden and Estonia in subjects 20-64 years of age revealed the highest prevalence of physician-diagnosed asthma in Sweden, 7.8%, while the prevalence in Finland was 5.9% and in Estonia 2.0% (p<0.001). The prevalence of physician-diagnosed asthma among those aged 20-29 years was 7.9% in Stockholm, 6.3% in Helsinki and 2.8% in Tallinn. Asthma-related symptoms were most common in Estonia, and among those with typical asthma symptoms the diagnosis of asthma was least likely in Estonia. Physician-diagnosed chronic bronchitis was reported to be 10.7% in Estonia, 3.1% in Sweden and 2.9% in Finland among subjects aged 20-64 years (p<0.001). Among those aged 20-29 years, 7.6% in Tallinn reported physician-diagnosed chronic bronchitis, while the prevalence estimates were 1.4% in Stockholm and 1.3% in Helsinki. The prevalence of smoking was similar for women in all three countries, around 30%, but large differences in smoking habits were present among men; 60% of Estonian, 39% of Finnish and 28% of Swedish men smoked. Skin-prick tests in Helsinki revealed a high prevalence of sensitization, 46.9%. For subjects aged 26-39 years, the prevalence was highest, 56.8%, and 23.7% were sensitized to at least four allergens. The most common sensitizing allergen was the dog. Sensitization to multiple allergens was associated with a high prevalence of asthma and allergic rhinitis. Conclusions: Compared with earlier Finnish studies, a higher prevalence of asthma and a lower prevalence of chronic bronchitis were found in Helsinki. The prevalence of physician-diagnosed chronic bronchitis was low in Helsinki, with only one-fifth of subjects fulfilling the symptom criteria for chronic bronchitis reporting having a diagnosis of chronic bronchitis. The prevalences of asthma and chronic bronchitis were similar in Finland and Sweden, but in Estonia physician-diagnosed asthma was less common and physician-diagnosed chronic bronchitis more common, particularly among young subjects. Further analyses revealed that the diagnosis of asthma was favoured in Finland and Sweden, while the diagnosis of chronic bronchitis was more likely in Estonia for subjects with the same symptoms. Allergic sensitization was common in Helsinki. Our findings of multiple sensitization also speak in favour of evaluating the degree of sensitization when assessing allergies.