Lastensuojelun dokumentointi ja perheen sisällä ilmenevä väkivalta

Käsittelen pro gradu -tutkielmassani perheen sisällä ilmenevää väkivaltaa. Tutkimuskysymykseni ovat 1) Mitä väkivallasta on dokumentoitu lastensuojelun asiakirjoihin ja 2) Kenen näkemyksiä väkivallasta asiakirjoihin on kirjattu. Tutkielma keskittyy psyykkiseen väkivaltaan, jonka käsitän lapsen altistumisella väkivallalle, sekä lapseen suoraan kohdistuvaan fyysiseen väkivaltaan. Useista tutkielmani otokseen valikoituneista perheistä oli tehty lastensuojeluilmoituksia sekä perheväkivallasta että lapsen tai nuoren pahoinpitelystä. Tutkielman tarkoituksena on kiinnittää huomiota lastensuojelun dokumentointiin ja siihen kuinka paljon väkivallasta dokumentoidaan asiakirjoihin. Dokumentointi on olennainen osa lastensuojelutyötä, koska se tekee työn näkyväksi. Asiakirjatekstejä voidaan käyttää apuna päätöksiä perusteltaessa. Tutkielman aineisto on kerätty lastensuojelun asiakirjoista 10 perheen lastensuojeluhistorian ajalta. Tutkielmaa varten on haettu tutkimuslupa. Tutkimuksen aineisto on kerätty satunnaisotannalla lastensuojeluilmoituksista, joiden syykoodina on käytetty perheväkivaltaa tai lapsen tai nuoren pahoinpitelyä. Aineisto on analysoitu teoriaohjaavalla sisällönanalyysilla. Tutkielman tärkein tulos on, että väkivallasta on dokumentoitu todella vähän lastensuojelun asiakirjoihin. Perheen muut ongelmat saavat huomattavasti suuremman painoarvon dokumenteissa. Lapsilta ei ole juuri kysytty perheen sisällä ilmenevästä väkivallasta. Äidit ovat dokumenttien mukaan aktiivisimmat toimijat lastensuojelussa ja heidän näkemyksiään väkivallasta on kirjattu eniten dokumentteihin. Lastensuojelun sosiaalityöntekijät ovat kirjanneet vähän omia näkemyksiään väkivallasta ja dokumentointi keskittyy kolmeen perheeseen. Dokumentointi toistuu samanlaisena. Catherine Humphreys on tutkinut paljon lastensuojelutyötä perheissä, joissa on ilmennyt väkivaltaa. Olen käyttänyt tutkielmani lähteinä kolmea hänen teostaan. Kotimaisen tutkimuksen osalta eniten käytetty lähde on Eija Paavilaisen ja Tarja Pösön toimittama teos "Lapset, perhe ja väkivaltatyö". Aineiston analyysiluku pohjautuu pitkälti Jouni Tuomen ja Anneli Sarajärven kirjaan “Laadullinen tutkimus ja sisällönanalyysi”.

Pala kakusta : tulonjaon oikeudenmukaisuus modernissa poliittisessa filosofiassa

Pro gradu -tutkielmani käsittelee tulonjaon oikeudenmukaisuuteen liittyviä kysymyksiä viime vuosikymmenien poliittisessa filosofiassa. Työni tutkimuskohteena ovat erilaiset distribuutiomallit ja redistribuution oikeutus. Lähtökohtanani työssäni toimi John Rawlsin aloittama keskustelu distributiivisesta oikeudenmukaisuudesta. Rawlsin teos A Theory of Justice (1971) toimi modernin tulonjaon oikeudenmukaisuus-keskustelun lähtölaukauksena. Rawlsin näkemyksien pääkommentaattoreina työssäni toimivat G.A Cohen, Robert Nozick, Michael Walzer, Thomas Nagel, Liam Murphy ja Thomas Pogge. Tutkimukseni tarkoituksena on tutkia yhteiskunnallisen tulonjaon oikeudenmukaisuutta. Käsittelen kysymyksiä siitä kuinka yhteiskunnalliset hyvät tulisi jakaa ja millaisia tulisi olla niiden rakenteellisten ratkaisujen, jotka mahdollistavat oikeudenmukai- sen yhteiskunnan. Toinen tärkeä kysymys työssäni on, kuinka voimme oikeuttaa jo kertaalleen jaetun uudelleenjakamisen eli redistribuution, ilman että kajoamme yksilöiden perusoikeuksiin. Tutkin työssäni distribuutioon ja redistribuutioon liittyvien näkemysten suhdetta niihin arvoihin, joita länsimaiset liberalismiin ja demokratiaan sitoutuneet yhteiskunnat korostavat, kuten ihmisten perusoikeudet, riittävä toimeentulo ja vapaus. Millaisilla tulonjakoon liittyvillä keinolla voimme päästä lähemmäksi kyseisten arvoja toteutumista yhteiskunnissamme? Tällöin kuvaan astuu myös kysymys lähtökohtien ja lopputuloksen oikeudenmukaisuuden merkityksestä. Voimmeko muutella toteutettua distribuutiota redistribuution avulla, jos emme saa aikaan niitä tuloksia, joita olimme toivoneet? Työni lopussa kysyn: jos toteamme, että meidän tulisi pyrkiä kohti oikeudenmukaisempaa tulonjakoa kansallisvaltioiden sisällä, niin miten tämän tulisi vaikuttaa näkemyksiimme kansainvälisestä tulonjaosta? Tutkimuksessani selvisi, että on vaikea löytää moraalisia perusteita sille, miksi yhteiskunnissamme ei tulisi pyrkiä kohti tasa- arvoisempaa tulonjakoa. Markkinoiden vapautta ja absoluuttisia omistusoikeuksia korostavilla näkemyksillä ei ole moraalisesti kestäviä perusteita, minkä vuoksi niihin vetoaminen ei ole riittävä syy olla puuttumatta tulonjakoon oikeudenmukaisuuden näkökulmasta. Länsimaisissa yhteiskunnissa arvopohjanamme ovat ihmis- ja kansalaisoikeudet. Samoin on linjattu, että yhteis- kuntaan kuuluu alueita, jotka eivät toimi markkinapohjaisesti. Yhteiskunnan puuttuminen tulonjakoon ei itsessään loukkaa kenenkään perusoikeuksia Redistribuutio on osa samaa prosessia kuin distribuutio. Mitään distribuutiota on vaikea pitää abso- luuttisena, eikä mikään distribuutio pysy muuttumattomana. Näin ollen redistribuutio jatkaa samaa oikeudenmukaisen jaon pyrkimystä, mikä ilmeni aikaisemmassa jaossa. Asioiden uudelleenjakaminen hyvästä syystä ei ole itsessään moraalisesti kestämätöntä. Verotusta on vaikea pitää moraalisena ongelmana, sillä verotus linkittyy yhteiskunnissamme samaan rakenteeseen kuin omistusoikeudet. Näin ollen samalla kun yhteiskunta takaa omistusoikeudet, se varaa myös oikeuden puuttua tulonjakoon.

Spatial ecology of food webs : herbivore-parasitoid communities on the pedunculate oak

Herbivorous insects, their host plants and natural enemies form the largest and most species-rich communities on earth. But what forces structure such communities? Do they represent random collections of species, or are they assembled by given rules? To address these questions, food webs offer excellent tools. As a result of their versatile information content, such webs have become the focus of intensive research over the last few decades. In this thesis, I study herbivore-parasitoid food webs from a new perspective: I construct multiple, quantitative food webs in a spatially explicit setting, at two different scales. Focusing on food webs consisting of specialist herbivores and their natural enemies on the pedunculate oak, Quercus robur, I examine consistency in food web structure across space and time, and how landscape context affects this structure. As an important methodological development, I use DNA barcoding to resolve potential cryptic species in the food webs, and to examine their effect on food web structure. I find that DNA barcoding changes our perception of species identity for as many as a third of the individuals, by reducing misidentifications and by resolving several cryptic species. In terms of the variation detected in food web structure, I find surprising consistency in both space and time. From a spatial perspective, landscape context leaves no detectable imprint on food web structure, while species richness declines significantly with decreasing connectivity. From a temporal perspective, food web structure remains predictable from year to year, despite considerable species turnover in local communities. The rate of such turnover varies between guilds and species within guilds. The factors best explaining these observations are abundant and common species, which have a quantitatively dominant imprint on overall structure, and suffer the lowest turnover. By contrast, rare species with little impact on food web structure exhibit the highest turnover rates. These patterns reveal important limitations of modern metrics of quantitative food web structure. While they accurately describe the overall topology of the web and its most significant interactions, they are disproportionately affected by species with given traits, and insensitive to the specific identity of species. As rare species have been shown to be important for food web stability, metrics depicting quantitative food web structure should then not be used as the sole descriptors of communities in a changing world. To detect and resolve the versatile imprint of global environmental change, one should rather use these metrics as one tool among several.

Luomu – ja Reilun kaupan kuluttajien käsityksiä eettisestä ruoan kuluttamisesta

Työn tavoitteena oli kuvata ja analysoida eettisen ruoan kuluttamisen käsitettä luomu – ja Reilun kaupan kuluttajien näkökulmasta. Mielenkiintona oli selvittää, mitä eettisessä ruoan kuluttamisessa koetaan merkitykselliseksi ja mitä ovat eettiset ruokavalinnat. Lisäksi haluttiin selvittää, millä tapaa eettisinä juuri luomu – ja Reilun kaupan tuotteet näyttyivät. Aihetta lähestyttiin tutkielman kirjallisuusosiossa etiikan teorioiden kautta sekä luomalla katsaus eettisen kuluttamisen eri osa-alueisiin eli eettisiin ulottuvuuksiin. Tämä jälkeen keskityttiin eettiseen ruoan kuluttamiseen ja luomu ja Reilun kaupan tuotteiden eettisyyteen vertailevasta näkökulmasta. Kirjallisuuskatsauksen perusteella hahmoteltiin teoreettinen viitekehys, jossa kuvattiin eettisen ruoan kuluttamisen sisältöä ja merkitystä, sekä niiden yhteyttä ruokavalintoihin. Empiirinen aineisto kerättiin keväällä 2010 teemahaastatteluina, joissa haastateltiin 12 luomu- ja Reilun kaupan kuluttajaa. Haastatteluaineisto analysoitiin ja luokiteltiin fenomenografisella menetelmällä. Tutkimuksen tulokset, käsitykset eettisestä ruoan kuluttamisesta esitettiin kuvauskategoriasysteeminä. Eettinen ruoan kuluttaminen näyttäytyi, kuten aikaisemmissa tutkimuksissa, altruistisena välittämisenä niin muista ihmisistä, eläimistä kuin ympäristöstä, mutta voimakkaasti myös kuluttajan ja tämän perheen terveydestä ja turvallisuudesta huolehtimisena. Näistä käsityksistä seuranneet ruokavalinnat olivat lähiruoka, luomu – ja Reilun kaupan tuotteet sekä kasvis- tai kasvispainotteinen ruoka. Näistä korostuneimman eettisenä koettiin lähiruoka. Luomutuotteet puolestaan koettiin pääasiallisesti eettisenä terveyden kannalta ja Reilun kaupan tuotteet muiden ihmisten hyvinvoinnin kannalta. Edellä kuvattujen käsitysten ohella merkittäväksi tulokseksi nousi käsitys eettisestä ruoan kuluttamisesta vapaaehtoisena yksinkertaistamisena, tai ainakin pyrkimyksenä siihen. Yksinkertaistaminen näyttäytyi eriasteisena oman ruoan kulutuksen kohtuullistamisena ja jopa luopumisena omasta mielihyvästä eettisten periaatteiden takia.

Didactical reconstructions for organizing knowledge in physics teacher education

Physics teachers are in a key position to form the attitudes and conceptions of future generations toward science and technology, as well as to educate future generations of scientists. Therefore, good teacher education is one of the key areas of physics departments education program. This dissertation is a contribution to the research-based development of high quality physics teacher education, designed to meet three central challenges of good teaching. The first challenge relates to the organization of physics content knowledge. The second challenge, connected to the first one, is to understand the role of experiments and models in (re)constructing the content knowledge of physics for purposes of teaching. The third challenge is to provide for pre-service physics teachers opportunities and resources for reflecting on or assessing their knowledge and experience about physics and physics education. This dissertation demonstrates how these challenges can be met when the content knowledge of physics, the relevant epistemological aspects of physics and the pedagogical knowledge of teaching and learning physics are combined. The theoretical part of this dissertation is concerned with designing two didactical reconstructions for purposes of physics teacher education: the didactical reconstruction of processes (DRoP) and the didactical reconstruction of structures (DRoS). This part starts with taking into account the required professional competencies of physics teachers, the pedagogical aspects of teaching and learning, and the benefits of the graphical ways of representing knowledge. Then it continues with the conceptual and philosophical analysis of physics, especially with the analysis of experiments and models role in constructing knowledge. This analysis is condensed in the form of the epistemological reconstruction of knowledge justification. Finally, these two parts are combined in the designing and production of the DRoP and DRoS. The DRoP captures the knowledge formation of physical concepts and laws in concise and simplified form while still retaining authenticity from the processes of how concepts have been formed. The DRoS is used for representing the structural knowledge of physics, the connections between physical concepts, quantities and laws, to varying extents. Both DRoP and DRoS are represented in graphical form by means of flow charts consisting of nodes and directed links connecting the nodes. The empirical part discusses two case studies that show how the three challenges are met through the use of DRoP and DRoS and how the outcomes of teaching solutions based on them are evaluated. The research approach is qualitative; it aims at the in-depth evaluation and understanding about the usefulness of the didactical reconstructions. The data, which were collected from the advanced course for prospective physics teachers during 20012006, consisted of DRoP and DRoS flow charts made by students and student interviews. The first case study discusses how student teachers used DRoP flow charts to understand the process of forming knowledge about the law of electromagnetic induction. The second case study discusses how student teachers learned to understand the development of physical quantities as related to the temperature concept by using DRoS flow charts. In both studies, the attention is focused on the use of DRoP and DRoS to organize knowledge and on the role of experiments and models in this organization process. The results show that students understanding about physics knowledge production improved and their knowledge became more organized and coherent. It is shown that the flow charts and the didactical reconstructions behind them had an important role in gaining these positive learning results. On the basis of the results reported here, the designed learning tools have been adopted as a standard part of the teaching solutions used in the physics teacher education courses in the Department of Physics, University of Helsinki.

Henkilökunnan päihdeongelmat leikkaus- ja teho-osastoilla Suomessa

Anestesiahenkilökunnalla on useissa kansainvälisissä tutkimuksissa todettu esiintyvän enemmän päihteiden väärinkäyttöä kuin muilla erikoisaloilla. Tämän on arveltu johtuvan lääkkeiden helposta saatavuudesta, työn stressaavuudesta tai tahattomasta altistumisesta leikkaussalissa höyrystyneille lääkeaineille. Suomalaisia tutkimuksia aiheesta ei ole julkaistu. Tutkielman tarkoituksena on selvittää sähköpostikyselyiden ja asiantuntijahaastatteluiden avulla henkilökunnan päihdeongelmien yleisyyttä Suomen leikkaus- ja teho-osastoilla. Tavoitteena on myös saada tietoa muun muassa väärinkäytetyistä aineista, ovatko väärinkäyttäjät saaneet hoitoa ongelmaansa ja ovatko he myöhemmin pystyneet palaamaan entiseen työhönsä. Saatujen tulosten mukaan Suomen leikkaus- ja teho-osastojen henkilökunnalla ei näyttäisi esiintyvän sen enempää päihdeongelmia kuin väestössä keskimäärin. Alkoholi on selvästi yleisimmin väärinkäytetty aine, mutta myös opioidien ja bentsodiatsepiinien väärinkäyttöä esiintyy. Huolestuttavaa on, että vaikka suurin osa väärinkäyttäjistä sai hoitoa ongelmaansa, heistä vain kolmasosa pystyi palaamaan entiseen työhönsä ongelmitta. Tutkielmaa käytetään hyväksi Huume- ja päihdetyöryhmän työskentelyssä ja loppuraportissa. Alkuvuodesta 2011 ilmestyvässä loppuraportissa on toimenpide-ehdotuksia, joiden avulla leikkaus- ja teho-osastoilla voidaan ennaltaehkäistä henkilökunnan päihdeongelmia sekä lääkeainevarkauksia.

Depression and Cognition in Type 2 Diabetes from a Life Course Perspective

Background: Type 2 diabetes is linked to several complications which add to both physical and mental distress. Depression is a common co-morbidity of diabetes which can occur both as a cause and a consequence of type 2 diabetes. Depression has been shown to correlate with glucose regulation and treating depression might prove beneficial for glucose regulation as well as for mental well being. Another complication which might affect diabetes management is cognitive decline. Several risk factors and complications of diabetes might modify the risk for developing cognitive impairment, which is increased 1.5 times among subjects with type 2 diabetes. Type 2 diabetes, depression and impaired cognitive performance have all been linked to low birth weight. This thesis aimed to explore the effects and interactions of birth weight, depression and cognitive ability in relation to type 2 diabetes from a life course perspective. Subjects and methods: Studies I, II and V were part of the Helsinki Birth Cohort Study. 2003 subjects participated in an extensive clinical examination at an average age of 61 years. A standard glucose tolerance test (OGTT) was performed and depressive symptoms were assessed using the Beck Depression Inventory (BDI). In addition data was obtained from child welfare clinics and national registers. A subset of the cohort (n=1247) also performed a test on cognitive performance (CogState ®) at the average age of 64. Studies III and IV were randomised clinical trials where mildly depressed diabetic subjects were treated with paroxetine or placebo and the effect on metabolic parameters and quality of life was assessed. The first trial included 14 women and lasted 10 weeks, while the second trial included 43 subjects, both men and women, and lasted 6 months. Results: Type 2 diabetes was positively associated with the occurrence of depressive symptoms. Among diabetic subjects 23.6% had depressive symptoms, compared to 16.7% of subjects with normal glucose tolerance (OR = 1.77, p<0.001). Formal mediation analysis revealed that cardiovascular disease (CVD) is likely to act as a mediator in the association. Furthermore, low birth weight was found to modify the association between type 2 diabetes, CVD and depression. The association between BDI score and having type 2 diabetes or CVD was twice as strong in the subgroup with low birth weight (≤ 2500g) compared with the group with birth weight > 2500g (p for interaction 0.058). In the six months long randomised clinical trial (study IV) paroxetine had a transient beneficial effect on glycosylated haemoglobin A1c (GHbA1c) and quality of life when compared to placebo after three months of treatment. In study V we found that subjects with known diabetes had a consistently poorer level of cognitive performance than subjects with normal glucose tolerance in most of the tested cognitive domains. This effect was further amplified among those born with a small birth weight (p for interaction 0.002). Conclusions: Type 2 diabetes is associated with a higher occurrence of depressive symptoms compared to subjects with normal glucose tolerance. This association is especially strong among subjects with CVD and those born with a low birth weight. Treating depressed diabetic subjects with paroxetine has no long term effect on glucose regulation. Physicians should be aware of depression as an important co-morbidity of type 2 diabetes. Both depression and the cognitive decline often seen among diabetic subjects are increased if the subject is born with a low birth weight. Physicians should recognise low birth weight as an additional risk factor and modifier of diabetic complications.

Breathing, swallowing and voice in laryngeal disorsers

The aim of this work was to examine how breathing, swallowing and voicing are affected in different laryngeal disorders. For this purpose, we examined four different patient groups: patients who had undergone total laryngectomy, anterior cervical decompression (ACD), or injection laryngoplasty with autologous fascia (ILAF), and patients with dyspnea during exercise. We studied the problems and benefits related to the automatic speech valve used for the rehabilitation of speech in laryngectomized patients. The device was given to 14 total laryngectomized patients who used the traditional valve especially well. The usefulness of voice and intelligibility of speech were assessed by speech pathologists. The results demonstrated better performance with the traditional valve in both dimensions. Most of the patients considered the automatic valve a helpful additional device but because of heavier breathing and the greater work needed for speech production, it was not suitable as a sole device in speech rehabilitation. Dysphonia and dysphagia are known complications of ACD. These symptoms are caused due to the stretching of tissue needed during the surgery, but the extent and the recovery from them was not well known before our study. We studied two patient groups, an early group with 50 patients who were examined immediately before and after the surgery and a late group with 64 patients who were examined 3 9 months postoperatively. Altogether, 60% reported dysphonia and 69% dysphagia immediately after the operation. Even though dysphagia and dysphonia often appeared after surgery, permanent problems seldom occurred. Six (12 %) cases of transient and two (3 %) permanent vocal cord paresis were detected. In our third study, the long-term results of ILAF in 43 patients with unilateral vocal cord paralysis were examined. The mean follow-up was 5.8 years (range 3 10). Perceptual evaluation demonstrated improved results for voice quality, and videostroboscopy revealed complete or partial glottal closure in 83% of the patients. Fascia showed to be a stable injection material with good vocal results. In our final study we developed a new diagnostic method for exertional laryngeal dyspnea by combining a cardiovascular exercise test with simultaneous fiberoptic observation of the larynx. With this method, it is possible to visualize paradoxal closure of the vocal cords during inspiration, which is a diagnostic criterion for vocal cord dysfunction (VCD). We examined 30 patients referred to our hospital because of suspicion of exercise-induced vocal cord dysfunction (EIVCD). Twenty seven out of thirty patients were able to perform the test. Dyspnea was induced in 15 patients, and of them five had EIVCD and four high suspicion of EIVCD. With our test it is possible to set an accurate diagnosis for exertional laryngeal dyspnea. Moreover, the often seen unnecessary use of asthma drugs among these patients can be avoided.

Tyttöjen toinen koti : Etnografinen tutkimus tyttökulttuurista ratsastustalleilla

Horseback riding is a popular activity in Finland, especially among young women and girls. For centuries, however, horse husbandry and horse culture in Finland had been dominated by men. Nowadays it is mainly the girls who ride as a hobby and take care of the horses. The stable has evolved into an important social sphere for girls, a semi-public room of their own where they spend time together. A study of the girl culture in the riding stable offers a unique perspective as well as new information on becoming a girl and a young woman in Finland. The subject of my research is the girl culture and girls communities at the horseback riding stables. In this thesis I discuss what kind of girl-cultural sphere the stable is, how girls organize their community, and what different aspects and meanings the hobby entails for girls while they are actively engaged in the hobby. I focus on the construction of gender and girlhood and examine how these gender constructions can be theorized as gender tradition. The research material consists of the interviews of 22 stable girls from different parts of Finland and an observation period at one of the stables. The informants were from 13 to 27 years of age. The theoretical background is based on the anthropological study of folklore, girls studies, feminist theory and post-humanist viewpoints. I am interested in how girls culture and girlhood are produced performatively in the interview narration and participant observation. I concentrate on four aspects of this culture: 1) what girls do at the stable, and what kind of relationships they create with horses; 2) social relations focusing on the ways girls construct their own groups, the way their hierarchy is constructed and how they use power; 3) the norms and social control regarding social behaviour; and 4) the reasons girls give for their involvement in the hobby, and girls interest in horses in general. In this girl culture, gender norms and boundaries are not only stretched or transgressed, but the culture also re-produces the hierarchical and stereotypical ideas of gender. The traditions of gender express both the hegemonic gender system and those ideas of gender which girls resist, at least momentarily. Constructions of gender and gender tradition are constituted at the intersections of historical and contemporary expectations of what it means to be a girl. Conscious of these societal demands, girls support, reproduce, challenge, and make comments on them.

Mobiiliuden mahdollisuuksia oppilaslähtöisen sisällöntuotannon tukemisessa portfoliotyöskentelyssä

Tiivistelmä Mobiilius on nopeasti kehittyvässä teknologiassa yksi merkittävimmistä ominaisuuksista tiedonvälitykselle ja tiedon käsittelyn käytänteille. Mobiiliudella tarkoitetaan liikkuvuutta, joka voidaan liittää oppilaan fyysiseen liikkuvuuteen tai työskentelyn mahdollisuuteen missä ja milloin tahansa tietotekniikan keinoin. Tässä artikkelissa tarkastellaan mobiililaitteiden käyttöä digitaaliseen portfoliotyöskentelyyn liittyvässä oppilaslähtöisessä sisällöntuotannossa. Artikkeli on osa laajempaa design-tutkimusta, jonka tavoitteena on löytää keinoja oppimisprosessin tukemiseksi monimuotoisessa etäopetusympäristössä perusasteen vieraiden kielten opetuksessa. Tuloksista voidaan todeta, että sisällöntuotanto digitaalisiin portfolioihin osoittautui itseohjautuvuutta tukevaksi pedagogiseksi ratkaisuksi. Mobiilius ajan ja erityisesti paikan suhteen merkitsee mahdollisuutta ja joustavuutta tilanteessa, jossa oppilaat opiskelevat fyysisesti ja virtuaalisesti eri tiloissa. Tutkimuksen tuloksia voidaan hyödyntää oppivan tietoyhteiskunnan teknologiakäytänteiden vakiinnuttamisessa koulun arjessa.

The Proto-Lucianic Problem in 1 Samuel

The Lucianic text of the Septuagint of the Historical Books witnessed primarily by the manuscript group L (19, 82, 93, 108, and 127) consists of at least two strata: the recensional elements, which date back to about 300 C.E., and the substratum under these recensional elements, the proto-Lucianic text. Some distinctive readings in L seem to be supported by witnesses that antedate the supposed time of the recension. These witnesses include the biblical quotations of Josephus, Hippolytus, Irenaeus, Tertullian, and Cyprian, and the Old Latin translation of the Septuagint. It has also been posited that some Lucianic readings might go back to Hebrew readings that are not found in the Masoretic text but appear in the Qumran biblical texts. This phenomenon constitutes the proto-Lucianic problem. In chapter 1 the proto-Lucianic problem and its research history are introduced. Josephus references to 1 Samuel are analyzed in chapter 2. His agreements with L are few and are mostly only apparent or, at best, coincidental. In chapters 3 6 the quotations by four early Church Fathers are analyzed. Hippolytus Septuagint text is extremely hard to establish since his quotations from 1 Samuel have only been preserved in Armenian and Georgian translations. Most of the suggested agreements between Hippolytus and L are only apparent or coincidental. Irenaeus is the most trustworthy textual witness of the four early Church Fathers. His quotations from 1 Samuel agree with L several times against codex Vaticanus (B) and all or most of the other witnesses in preserving the original text. Tertullian and Cyprian agree with L in attesting some Hebraizing approximations that do not seem to be of Hexaplaric origin. The question is more likely of early Hebraizing readings of the same tradition as the kaige recension. In chapter 7 it is noted that Origen, although a pre-Lucianic Father, does not qualify as a proto-Lucianic witness. General observations about the Old Latin witnesses as well as an analysis of the manuscript La115 are given in chapter 8. In chapter 9 the theory of the proto-Lucianic recension is discussed. In order to demonstrate the existence of the proto-Lucianic recension one should find instances of indisputable agreement between the Qumran biblical manuscripts and L in readings that are secondary in Greek. No such case can be found in the Qumran material in 1 Samuel. In the text-historical conclusions (chapter 10) it is noted that of all the suggested proto-Lucianic agreements in 1 Samuel (about 75 plus 70 in La115) more than half are only apparent or, at best, coincidental. Of the indisputable agreements, however, 26 are agreements in the original reading. In about 20 instances the agreement is in a secondary reading. These agreements are early variants; mostly minor changes that happen all the time in the course of transmission. Four of the agreements, however, are in a pre-Hexaplaric Hebraizing approximation that has found its way independently into the pre-Lucianic witnesses and the Lucianic recension. The study aims at demonstrating the value of the Lucianic text as a textual witness: under the recensional layer(s) there is an ancient text that preserves very old, even original readings which have not been preserved in B and most of the other witnesses. The study also confirms the value of the early Church Fathers as textual witnesses.

Developmental-like responses in injured mature central neurons

Traumatic insults to the central nervous system are frequently followed by profound and irreversible neuronal loss as well as the inability of the damaged neurons to regenerate. One of the major therapeutic challenges is to increase the amount of surviving neurons after trauma. Thus it is crucial to understand how injury affects neuronal responses and which conditions are optimal for survival to prevent neuronal loss. During development neuronal survival is thought to be dependent on the competition for the availability of survival-promoting molecules called neurotrophic factors. Much less is known on the survival mechanisms of mature neurons under traumatic conditions. Increasing amount of evidence points towards the possibility that after injury neuronal responses might aquire some developmental characteristics. One of the important examples is the change in the responses to the neurotransmitter GABA: it is inhibitory in the intact mature neurons, but can induce excitation during development and after trauma. An important step in the maturation of GABAergic transmission in the CNS is the developmental shift in the action of GABAA receptor from depolarization in immature neurons to hyperpolarization in mature neurons. GABAA-mediated responses are tightly linked to the homeostasis of the chloride anion (Cl-), which in neurons is mainly regulated by Na+-K+-2Cl- cotransporter NKCC1 and K+-Cl- cotransporter KCC2. Trauma-induced functional downregulation of KCC2 promotes a shift from hyperpolarizing GABAA-mediated responses to depolarizing. Other important consequences of neuronal trauma are the emergence of dependency of central neurons on brain-derived neuro¬trophic factor (BDNF) for survival, as well as the upregulation of neurotrophin receptor p75NTR. Our aim was to answer the question whether these post-traumatic events are interrelated, and whether the regulation of BDNF and KCC2 expression is different under traumatic conditions and in intact neurons. To study responses of injured mature central neurons, we used an in vitro and in vivo axotomy models. For in vitro studies, we lesioned organotypic hippocampal slices between CA3 and CA1 regions, which resulted in selective axotomy of the CA3 neurons and denervation of the CA1 neurons. Some experiments were repeated in vivo by lesioning the neurons of the corticospinal tract at the internal capsule level, or by lesioning spinal motoneurons at the ventral root. We show that intact mature neurons do not require BDNF for survival, whereas in axotomized neurons apoptosis is induced upon BDNF deprivation. We further show that post-traumatic dependency on BDNF is mediated by injury-induced upregulation of p75NTR. Post-traumatic increase in p75NTR is induced by GABAA-mediated depolarization, consequent opening of voltage-gated Ca2+ channels, and the activation of Rho kinase ROCK. Thus, post-traumatic KCC2 downregulation leads to the dependency on BDNF through the induction of p75NTR upregulation. Neurons that survive after axotomy over longer period of time lose BDNF dependency and regain normal KCC2 levels. This phenomenon is promoted by BDNF itself, since after axotomy contrary to normal conditions KCC2 is upregulated by BDNF. The developmentally important thyroid hormone thyroxin regulates BDNF expression during development. We show that in mature intact neurons thyroxin downregulates BDNF, whereas after axotomy thyroxin upregulates BDNF. The elevation of BDNF expression by thyroxin promoted survival of injured neurons. In addition, thyroxin also enhanced axonal regeneration and promoted the regaining of normal levels of KCC2. Thus we show that this hormone acts at several levels on the axotomy-initiated chain of events described in the present work, and could be a potential therapeutic agent for the injured neurons. We have also characterized a previously unknown downregulatory interaction between thyroxin and KCC2 in intact neurons. In conclusion, we identified several important interactions at the neurotrophin-protein and hormone-neurotrophin level that acquire immature-like characteristics after axotomy and elucidated an important part of the mechanism by which axotomy leads to the requirement of BDNF trophic support. Based on these findings, we propose a new potential therapeutic strategy where developmentally crucial agents could be used to enhance survival and regeneration of axotomized mature central neurons.

Components of fractionated stallion seminal plasma and the effects of seminal plasma on sperm longevity

Seminal plasma (SP) is the fluid portion of semen, secreted by the epididymides and the accessory glands before and during ejaculation. The stallion s ejaculate is a series of jets that differ in sperm concentration, semen volume and biochemical composition. Before the actual ejaculation, a clear and watery pre-sperm fluid is secreted. The first three jets form the sperm-rich fractions, and contain ¾ of the total number of sperm. The semen volume and sperm concentration in each of the jets decrease towards the end of the ejaculation, and the last jets are sperm-poor fractions with a low sperm concentration. The aims of these studies were to examine the effects of the different SP fractions, and the presence of SP, on sperm survival during storage. Pre-sperm fluid, and semen fractions with a high (sperm-rich) and low (sperm-poor) sperm concentration were collected in five experiments. The levels of selected enzymes, electrolytes and proteins in different SP fractions were determined. These studies also aimed at assessing the individual variation in the levels of the selected SP components and in the effects of SP on spermatozoa. The association between the components of SP and semen quality, sperm longevity, and fertility was examined with a stepwise linear regression analysis. Compared to samples containing SP during storage, centrifugation and the subsequent removal of SP reduced sperm motility parameters during 24 h of cooled storage in all SP fractions, but sperm membrane integrity was not affected. Some of the measured post-thaw motility parameters were also higher in samples containing SP compared to samples stored without SP. In contrast, the proportion of DNA-damaged spermatozoa was greater in the samples stored with SP than those without SP, and this effect was seen in both sperm-rich and sperm-poor fractions. There were no differences in DNA integrity between fractions stored with SP, but the sperm-rich fraction showed less DNA damage than the sperm-poor fraction after SP removal. The differences between fractions in sperm motility after cooled storage were non-significant. The levels of alkaline phosphatase, acid phosphatase and β-glucuronidase were higher in the sperm-rich fractions compared to the sperm-poor fractions, while the concentrations of calcium and magnesium were higher in sperm-poor fractions than in sperm-rich fractions. The concentrations of sodium and chloride were highest in pre-sperm fluid. In the sperm-poor fraction, the level of potassium was associated with the maintenance of sperm motility during storage. The levels of alkaline and acid phosphatase were associated with sperm concentration and the total number of spermatozoa in the ejaculates. None of the measured SP components were correlated to the first cycle pregnancy rate. In summary, the removal of SP improved DNA integrity after cooled storage compared with samples containing SP. There were no differences in the maintenance of sperm motility between the sperm-rich and sperm-poor fractions and whole ejaculates during cooled storage, irrespective of the presence of SP. The lowest rate of DNA damage was found in the sperm-rich fractions stored without SP. In practice, the results presented in this thesis support the use of individual modifications of semen processing techniques for cooled transported semen from subfertile stallions.

Myotonic dystrophy type 2 (DM2) : Diagnostic methods and molecular pathology

Myotonic dystrophies type 1 (DM1) and type 2 (DM2) are the most common forms of muscular dystrophy affecting adults. They are autosomal dominant diseases caused by microsatellite tri- or tetranucleotide repeat expansion mutations in transcribed but not translated gene regions. The mutant RNA accumulates in nuclei disturbing the expression of several genes. The more recently identified DM2 disease is less well known, yet more than 300 patients have been confirmed in Finland thus far, and the true number is believed to be much higher. DM1 and DM2 share some features in general clinical presentation and molecular pathology, yet they show distinctive differences, including disease severity and differential muscle and fiber type involvement. However, the molecular differences underlying DM1 and DM2 muscle pathology are not well understood. Although the primary tissue affected is muscle, both DMs show a multisystemic phenotype due to wide expression of the mutation-carrying genes. DM2 is particularly intriguing, as it shows an incredibly wide spectrum of clinical manifestations. For this reason, it constitutes a real diagnostic challenge. The core symptoms in DM2 include proximal muscle weakness, muscle pain, myotonia, cataracts, cardiac conduction defects and endocrinological disturbations; however, none of these is mandatory for the disease. Myalgic pains may be the most disabling symptom for decades, sometimes leading to incapacity for work. In addition, DM2 may cause major socio-economical consequences for the patient, if not diagnosed, due to misunderstanding and false stigmatization. In this thesis work, we have (I) improved DM2 differential diagnostics based on muscle biopsy, and (II) described abnormalities in mRNA and protein expression in DM1 and DM2 patient skeletal muscles, showing partial differences between the two diseases, which may contribute to muscle pathology in these diseases. This is the first description of histopathological differences between DM1 and DM2, which can be used in differential diagnostics. Two novel high-resolution applications of in situ -hybridization have been described, which can be used for direct visualization of the DM2 mutation in muscle biopsy sections, or mutation size determination on extended DNA-fibers. By measuring protein and mRNA expression in the samples, differential changes in expression patterns affecting contractile proteins, other structural proteins and calcium handling proteins in DM2 compared to DM1 were found. The dysregulation at mRNA level was caused by altered transciption and abnormal splicing. The findings reported here indicate that the extent of aberrant splicing is higher in DM2 compared to DM1. In addition, the described abnormalities to some extent correlate to the differences in fiber type involvement in the two disorders.