992 resultados para ogt 719
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Samlingen med signum HB Ib finns vid huvudbiblioteket och innehåller böcker, småskrifter och kataloger om böcker och om bibliotek. Bok- och biblioteksväsen har särskilt intresserat bibliotekets överbibliotekarier och detta har gjort att samlingen vid huvudbiblioteket blivit mycket omfattande, över 13.600 titlar, genom ett aktivt anskaffande av speciellt utländskt material som komplement till den litteratur som från och med år 1919 erhållits som friexemplar. Huvudbibliotekets systematiska kortkatalog som går till år 1980 är finindelad i klasserna HB Ib1 – HB Ib7. HB Ib1 Bok- och biblioteksväsen, allmänt period / antal titlar -1899 / 26 1900-49 / 184 1950-59 / 155 1960-69 / 144 1970-79 / 283 HB Ib2a Bibliografier, allmänt -1899 / 39 1900-49 / 77 1950-59 / 58 1960-69 / 149 1970-79 / 152 HB Ib2b Bibliografier enligt bibliotekets klassifikationssystem -1899 / 69 1900-49 / 168 1950-59 / 168 1960-69 / 451 1970-79 / 719 HB Ib2c Bibliografier, länder -1899 / 180 1900-49 / 497 1950-59 / 190 1960-69 / 283 1970-79 / 208 HB Ib2d Bibliografier, personbibliografier -1899 / 5 1900-49 / 117 1950-59 / 72 1960-69 / 146 1970-79 / 161 HB Ib3 Bibliotek -1899 / 162 1900-49 / 949 1950-59 / 292 1960-69 / 533 1970-79 / 968 HB Ib4 Arkiv, arkivteknik, organisation -1899 / 17 1900-49 / 69 1950-59 / 25 1960-69 / 58 1970-79 / 82 HB Ib5 Bokhandel, förlag, antikvariat -1899 / 62 1900-49 / 235 1950-59 / 71 1960-69 / 81 1970-79 / 77 HB Ib6a Bokväsen, allmänt -1899 / -- 1900-49 / 2 1950-59 / 2 1960-69 / 6 1970-79 / 18 HB Ib6a Bokväsen, bibliofili -1899 / 8 1900-49 / 35 1950-59 / 8 1960-69 / 4 1970-79 / 5 HB Ib6b Bokväsen, boktryckeri, bokhistoria -1899 / 89 1900-49 / 295 1950-59 / 119 1960-69 / 139 1970-79 / 104 HB Ib6d Bokväsen, bokbindning -1899 / 4 1900-49 / 30 1950-59 / 5 1960-69 / 13 1970-79 / 13 HB Ib6e Bokväsen, exlibris -1899 / 5 1900-49 / 34 1950-59 / 5 1960-69 / 9 1970-79 / 7 HB Ib7 Utställningskataloger -1899 / 4 1900-49 / 55 1950-59 / 66 1960-69 / 49 1970-79 / 41 Från och med år 1980 har litteraturen om bok- och biblioteksväsen införts i Alma utan finfördelning, dvs allt material mellan åren 1980 och 1999 har ett gemensamt signum, HB Ib. Från och med år 2000 ingår litteraturen om bok- och biblioteksväsen vid huvudbiblioteket i en numerus currens-samling. Sökning i Alma med ämnesord ger litteratur vid hela akademibiblioteket.
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Melartinin käsikirjoitusluettelon tunnus Mel 24:719 (ks. http://lib.siba.fi/fi/kokoelmat/kasikirjoitusarkisto/melartin_erkki/).
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Em Roraima, uma das principais doenças que incidem na cultura do feijão-caupi (Vigna unguiculata) é a mela causada pelo fungo Thanatephorus cucumeris (anamorfo Rhizoctonia solani). Este trabalho teve como objetivo avaliar a reação a esta doença de dez cultivares de feijão-caupi em área de cerrado em Roraima, em dois anos consecutivos. As cultivares de porte ereto utilizadas foram BRS-Mazagão, IT86D-719, Vita-7 (Epace-1), BR02-Bragança, Pitiúba, e as de porte prostrado, BRS-Amapá, BR03-Tracuateua, BR17-Gurguéia, BR14-Mulato e Canapuzinho. Os ensaios foram instalados em 2005 e 2006, utilizando-se o delineamento experimental em blocos completos casualizados com cinco tratamentos e quatro repetições. Avaliou-se, semanalmente, a porcentagem de área foliar lesionada para a obtenção da área baixo da curva de progresso da doença. Pelos resultados obtidos verificou-se que os genótipos de porte prostrado apresentaram menor severidade do que os de porte ereto, indicando uma relação da arquitetura da planta com a resistência à mela. As cultivares de porte prostrado, BRS-Amapá, BR03-Tracuateua, BR17-Gurguéia, BR14-Mulato e Canapuzinho, e as de porte ereto, BRS-Mazagão, Pitiúba e BR03-Bragança, foram as mais resistentes à mela e podem ser recomendadas para áreas com histórico de incidência da doença.
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O umbuzeiro é uma das espécies mais importantes do semiárido brasileiro, devido à sua capacidade de produzir frutos em ambiente de estresse hídrico. O objetivo deste estudo foi estimar taxas de polinização cruzada em umbuzeiro (), considerando-se a frequência de heterozigotos observada e esperada nas populações maternal e de descendentes (M1), respectivamente, e a estimativa de multilocos (M2), de forma a orientar programas de preservação e melhoramento genético da espécie. Amostras de DNA extraído de uma população maternal de 96 plantas, estabelecidas no campo em 1991, em Petrolina, PE, bem como DNA de um indivíduo descendente de cada planta-mãe, foram analisadas para 16 bandas polimórficas das combinações de primer de AFLPAAA_CTG e AAA_CTC. No M1, considerou-se a frequência de heterozigotos estimada pela raiz quadrada de 1 menos a frequência de ausência de fragmentos AFLP, tanto para a população maternal (frequência observada) quanto para a população de descendentes (frequência esperada), enquanto no M2 a estimativa foi obtida por estimativa multilocos (m). As estimativas de no M1 variaram de 1,74 a 0,50, com média de 1,063. Como valores de acima de 1,0 são biologicamente inaceitáveis, ficou demonstrado que M1 não foi apropriado para estimar . As frequências de óvulos e pólen para 15 locos de AFLP foram iguais, indicando boa adequação do modelo de acasalamento misto no M2. A taxa m obtida pelo M2 foi de 0,719, próxima de estimativas prévias com isoenzimas em outras populações da espécie. Os resultados indicam que o umbuzeiro é predominantemente de polinização cruzada e há necessidade de amostras amplas para preservar a variabilidade genética da espécie.
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1869/04/17 (Numéro 719).
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Glass is a unique material with a long history. Several glass products are used daily in our everyday life, often unnoticed. Glass can be found not only in obvious applications such as tableware, windows, and light bulbs, but also in tennis rackets, windmill turbine blades, optical devices, and medical implants. The glasses used at present as implants are inorganic silica-based melt-derived compositions mainly for hard-tissue repair as bone graft substitute in dentistry and orthopedics. The degree of glass reactivity desired varies according to implantation situation and it is vital that the ion release from any glasses used in medical applications is controlled. Understanding the in vitro dissolution rate of glasses provides a first approximation of their behavior in vivo. Specific studies concerning dissolution properties of bioactive glasses have been relatively scarce and mostly concentrated to static condition studies. The motivation behind this work was to develop a simple and accurate method for quantifying the in vitro dissolution rate of highly different types of glass compositions with interest for future clinical applications. By combining information from various experimental conditions, a better knowledge of glass dissolution and the suitability of different glasses for different medical applications can be obtained. Thus, two traditional and one novel approach were utilized in this thesis to study glass dissolution. The chemical durability of silicate glasses was tested in water and TRIS-buffered solution at static and dynamic conditions. The traditional in vitro testing with a TRISbuffered solution under static conditions works well with bioactive or with readily dissolving glasses, and it is easy to follow the ion dissolution reactions. However, in the buffered solution no marked differences between the more durable glasses were observed. The hydrolytic resistance of the glasses was studied using the standard procedure ISO 719. The relative scale given by the standard failed to provide any relevant information when bioactive glasses were studied. However, the clear differences in the hydrolytic resistance values imply that the method could be used as a rapid test to get an overall idea of the biodegradability of glasses. The standard method combined with the ion concentration and pH measurements gives a better estimate of the hydrolytic resistance because of the high silicon amount released from a glass. A sensitive on-line analysis method utilizing inductively coupled plasma optical emission spectrometer and a flow-through micro-volume pH electrode was developed to study the initial dissolution of biocompatible glasses. This approach was found suitable for compositions within a large range of chemical durability. With this approach, the initial dissolution of all ions could be measured simultaneously and quantitatively, which gave a good overall idea of the initial dissolution rates for the individual ions and the dissolution mechanism. These types of results with glass dissolution were presented for the first time during the course of writing this thesis. Based on the initial dissolution patterns obtained with the novel approach using TRIS, the experimental glasses could be divided into four distinct categories. The initial dissolution patterns of glasses correlated well with the anticipated bioactivity. Moreover, the normalized surface-specific mass loss rates and the different in vivo models and the actual in vivo data correlated well. The results suggest that this type of approach can be used for prescreening the suitability of novel glass compositions for future clinical applications. Furthermore, the results shed light on the possible bioactivity of glasses. An additional goal in this thesis was to gain insight into the phase changes occurring during various heat treatments of glasses with three selected compositions. Engineering-type T-T-T curves for glasses 1-98 and 13-93 were stablished. The information gained is essential in manufacturing amorphous porous implants or for drawing of continuous fibers of the glasses. Although both glasses can be hot worked to amorphous products at carefully controlled conditions, 1-98 showed one magnitude greater nucleation and crystal growth rate than 13-93. Thus, 13-93 is better suited than 1-98 for working processes which require long residence times at high temperatures. It was also shown that amorphous and partially crystalline porous implants can be sintered from bioactive glass S53P4. Surface crystallization of S53P4, forming Na2O∙CaO∙2SiO2, was observed to start at 650°C. The secondary crystals of Na2Ca4(PO4)2SiO4, reported for the first time in this thesis, were detected at higher temperatures, from 850°C to 1000°C. The crystal phases formed affected the dissolution behavior of the implants in simulated body fluid. This study opens up new possibilities for using S53P4 to manufacture various structures, while tailoring their bioactivity by controlling the proportions of the different phases. The results obtained in this thesis give valuable additional information and tools to the state of the art for designing glasses with respect to future clinical applications. With the knowledge gained we can identify different dissolution patters and use this information to improve the tuning of glass compositions. In addition, the novel online analysis approach provides an excellent opportunity to further enhance our knowledge of glass behavior in simulated body conditions.
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OBJETIVO: avaliar a influência da idade sobre a qualidade seminal de homens com quadro de infertilidade conjugal submetidos a análises espermáticas em um serviço de reprodução humana. MÉTODOS: estudo retrospectivo, no qual foram avaliados os espermogramas de todos os homens em processo de investigação para infertilidade conjugal no período de Setembro de 2002 a Dezembro de 2004, em um serviço de reprodução assistida do nordeste do Brasil. Foram incluídos 531 indivíduos submetidos a 531 avaliações espermáticas. Foram analisados os seguintes parâmetros: volume, concentração, motilidade e morfologia espermática. O total de investigados foi dividido em grupos, de acordo com resultados obtidos de cada variável estudada. Os grupos referentes ao volume seminal foram: hipoespermia, normoespermia e hiperespermia. Os grupos referentes à concentração espermática foram: azoospermia, oligoospermia, normospermia e poliespermia. Os grupos referentes à motilidade foram: motilidade normal e astenospermia. Os grupos referentes à morfologia foram: morfologia normal e teratospermia. As médias das idades dos pacientes entre os grupos com parâmetros normais foram comparadas com as de grupos alterados, sendo utilizado o teste t. Para análise estatística, foi utilizado o programa XLSTAT (p<0,05). RESULTADOS: os indivíduos estudados tinham média de idade de 37±7,9 anos, com um volume seminal médio de 3±1,4 mL, uma concentração espermática de 61,4±66,4 espermatozóides por mL de sêmen, motilidade progressiva de 44,7±19,4% do total de espermatozóides e morfologia normal de 11,2±6,6% dos espermatozóides. As médias de idade entre os grupos foram semelhantes, exceto a média dos indivíduos com hipoespermia, que foi significativamente maior que a dos homens com normoespermia (39,6±10,3 versus 36,5±7,3, p=0,001). CONCLUSÕES: a idade interfere, de forma inversamente proporcional, sobre o volume do ejaculado, porém não exerce influência na concentração, motilidade e morfologia espermática.
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OBJETIVO: elaborar e validar um questionário para medir os diferentes domínios da função sexual nas mulheres brasileiras pós-menopausa. MÉTODOS: participaram deste estudo 251 mulheres entre 2 e 15 anos após menopausa. Foi examinada a reprodutibilidade/confiabilidade do instrumento pelos coeficientes de correlação linear, intraclasse e concordância de Lin. A consistência interna foi examinada pelo coeficiente α de Cronbach. A verificação da face, conteúdo e construto seguiram diretrizes teóricas clássicas para validação de testes. RESULTADOS: foi gerado um instrumento inicial com 57 itens estruturados em nove domínios. Foram eliminados 14 (24,5%) questões por baixa correlação com a escala total ou pequeno poder de discriminação. A forma final com 43 itens demonstrou excelente reprodutibilidade (r=0,719; IC95%=0,690-0,750; pc=0,887; IC95%=0,850-0,930; p<0,001) e confiabilidade. A consistência interna da escala foi excelente (α de Cronbach 0,951) e cerca de 60% dos avaliadores confirmaram as validades de face e conteúdo. O exame da validade de construto mostrou adequação do instrumento (α=0,951). CONCLUSÕES: concluiu-se que o questionário proposto é adequado para examinar a função sexual feminina em mulheres pós-menopausa.
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Objetivaram-se avaliar lesões no trato genital em animais utilizados como doadores de oócitos. Foram examinadas vacas da raça Gir (n=20) que participaram de diferentes experimentos envolvendo a técnica de punção folicular. Ao término de cada período experimental, os animais foram examinados por palpação retal, ultra-sonografia e vaginoscopia. Um grupo de vacas (n=8) foi selecionado para a caracterização histopatológica das lesões ovarianas. Os ovários foram retirados cirurgicamente, fixados e processados, e as lâminas obtidas coradas e analisadas. Foram avaliados animais submetidos a entre nove e 42 sessões de punção, e que produziram entre 10 e 719 oócitos. Observou-se uma baixa prevalência (5,26%) de processos inflamatórios na mucosa do fundo de saco vaginal. A ocorrência de aderências apresentou uma correlação positiva com o número de sessões de punção a que o animal foi submetido (r=0,31; P<0,05), mas não com o total de oócitos recuperados (r=0,03; P>0,05). Tendência oposta foi observada em relação à fibrose ovariana, que apresentou uma alta correlação com o número de oócitos recuperados (r=0,53; P<0,05). A avaliação histopatológica demonstrou a presença de tecido cicatricial, infiltrados de células inflamatórias e presença de tecido luteal disperso no estroma ovariano.
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Foi realizado no ano agrícola 1976/77 um experimento em solo arenoso na Usina Utinga/LeãoAL, no qual foram testados em pré-emergência os tratamentos: hexazinone em 4 doses; hexazinone + diuron em 3 doses; diurom + 2,4 D amina e ametrina + 2,4 D amina. Aos 47, 78 e 111 dias, efetuaram-se as avaliações de fitotoxicidade à cana-de-açúcar e controle à Digitaria sanguinalis , Colopogonio sp, Paspalum distichum e Wedellia paludosa. A interpretação dos dados obtidos mostrou que os tratamentos com hexazinone (954 g/ha) e hexazinone (719 g/ha) + diuron (2048 g/ha) apresentaram diferença estatística em relação à produção quando comparadas à testemunha, além de serem eficientes no controle às plantas daninhas presentes no experimento. Nenhum tratamento prejudicou as qualidades tecnológicas da cana-de-açúcar.
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This study is based on the notion that all students are likely to have a computer of some kind as their primary tool at school within a few years. The overall aim is to contribute to the knowledge of what this development of computer-assisted multimodal text production and communication on and over the net may entail in a school context. The study has an abductive approach drawing on theory from Media and Communication studies and from Pedagogy - particularly on media peda-gogy, multimodality, storytelling, conversation research and deliberative democracy – and is based on a DBR project in three schools. The empirical data are retrieved from four school classes, school years 4 and 5, with good access to computers and digital cameras. The classes have used the class blogs to tell the blog visitors about their school work and Skype to communicate with other classes in Sweden and Tanzania. A variety of research methods was employed: content analysis of texts, observations with field notes and camera documentation, interviews with individual students, group interviews with teachers and students, and a small survey. The study is essentially qualitative, focusing on students’ different perceptions. A small quantitative study was conducted to determine if any factors and variables could be linked to each other and to enable comparisons of the surveyed group with other research results. The results suggest that more computers at school offer more opportunities for real-life assignments and the chance to secure an authentic audience to the students’ production; primarily the students’ parents and relatives, students in the same class and at other schools. A theoretical analysis model to determine the degree of reality and authenticity in various school assignments was developed. The results also indicate that having access to cameras for documenting various events in the classes and to an authentic audience can create new opportunities for storytelling that have not been practiced previously at school. The documentary photo invites a viewer into the present tense of the image and the location where the picture was taken, whoever took the picture. It is used by the students and here too, a model has been developed to describe this relationship. The study also focuses on the freedom of expression and democracy. One of the more unexpected findings is that the students in the study did not see that they can influence other people’s perceptions or change various power structures through communication on the web, neither in nor outside of school.
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Malaria continues to infect millions and kill hundreds of thousands of people worldwide each year, despite over a century of research and attempts to control and eliminate this infectious disease. Challenges such as the development and spread of drug resistant malaria parasites, insecticide resistance to mosquitoes, climate change, the presence of individuals with subpatent malaria infections which normally are asymptomatic and behavioral plasticity in the mosquito hinder the prospects of malaria control and elimination. In this thesis, mathematical models of malaria transmission and control that address the role of drug resistance, immunity, iron supplementation and anemia, immigration and visitation, and the presence of asymptomatic carriers in malaria transmission are developed. A within-host mathematical model of severe Plasmodium falciparum malaria is also developed. First, a deterministic mathematical model for transmission of antimalarial drug resistance parasites with superinfection is developed and analyzed. The possibility of increase in the risk of superinfection due to iron supplementation and fortification in malaria endemic areas is discussed. The model results calls upon stakeholders to weigh the pros and cons of iron supplementation to individuals living in malaria endemic regions. Second, a deterministic model of transmission of drug resistant malaria parasites, including the inflow of infective immigrants, is presented and analyzed. The optimal control theory is applied to this model to study the impact of various malaria and vector control strategies, such as screening of immigrants, treatment of drug-sensitive infections, treatment of drug-resistant infections, and the use of insecticide-treated bed nets and indoor spraying of mosquitoes. The results of the model emphasize the importance of using a combination of all four controls tools for effective malaria intervention. Next, a two-age-class mathematical model for malaria transmission with asymptomatic carriers is developed and analyzed. In development of this model, four possible control measures are analyzed: the use of long-lasting treated mosquito nets, indoor residual spraying, screening and treatment of symptomatic, and screening and treatment of asymptomatic individuals. The numerical results show that a disease-free equilibrium can be attained if all four control measures are used. A common pitfall for most epidemiological models is the absence of real data; model-based conclusions have to be drawn based on uncertain parameter values. In this thesis, an approach to study the robustness of optimal control solutions under such parameter uncertainty is presented. Numerical analysis of the optimal control problem in the presence of parameter uncertainty demonstrate the robustness of the optimal control approach that: when a comprehensive control strategy is used the main conclusions of the optimal control remain unchanged, even if inevitable variability remains in the control profiles. The results provide a promising framework for the design of cost-effective strategies for disease control with multiple interventions, even under considerable uncertainty of model parameters. Finally, a separate work modeling the within-host Plasmodium falciparum infection in humans is presented. The developed model allows re-infection of already-infected red blood cells. The model hypothesizes that in severe malaria due to parasite quest for survival and rapid multiplication, the Plasmodium falciparum can be absorbed in the already-infected red blood cells which accelerates the rupture rate and consequently cause anemia. Analysis of the model and parameter identifiability using Markov chain Monte Carlo methods is presented.