Made available in DSpace on 2017-07-10T17:37:02Z (GMT). No. of bitstreams: 1 Luiz_Claudio_Offemann.pdf: 946925 bytes, checksum: 6e708b213cd6fa0ed040f9f73a3bc05e (MD5) Previous issue date: 2015-02-24 / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior / The objective of this study was to evaluate the combined use of Azospirillum brasilense inoculation by seed and foliar application, associated to nitrogen fertilization on the agronomic characteristics of wheat. The experiment was installed in greenhouse on May 24th 2014, for this purpose, vases were used with capacity 15 dm3, in which were conducted 4 plants. The harvest proceeded on September 12th 2014, to 111 after emergence. The experimental design was a randomized block factorial 2 x 2 x 3, with four repetitions. The first factor was formed by the absence or presence of seed inoculation with A. brasilense. The second by nitrogen fertilization at doses of 70 and 140 Kg ha-1 (50 and 100% respectively). The third factor by application by foliar spraying of A. brasilense in the stages of tillering, booting and two applications, the first in the tillering and the second in booting. Were evaluated the biometric parameters of the culture at the end of the silking stage, the production components at the end of crop cycle. Were also evaluated gas exchange rates in the flag leaf and contents of macronutrients N, P and K in leaves and grains. It can be concluded that the use of A. brasilense, applied by foliar spraying, promotes increases in average internode length, average length of ears, dry leaves mass, ears and root, root volume and nitrogen content in leaves, besides maximize the effect of nitrogen fertilization. Gas exchange measurements and leaf nutrient content, were affected positively only by the higher nitrogen dose / Objetivou-se com este estudo avaliar o uso combinado de inoculação de Azospirillum brasilense, via semente e pulverização foliar, associada à adubação nitrogenada, nas características agronômicas da cultura do trigo. O experimento foi instalado em casa de vegetação no dia 24 de maio de 2014. Foram utilizados vasos com capacidade de 15 dm3, nos quais foram conduzidas 4 plantas. A colheita foi realizada no dia 12 de setembro de 2014, aos 111 dias após a emergência. O delineamento experimental adotado foi de blocos ao acaso em esquema fatorial 2 x 2 x 3, com quatro repetições. O primeiro fator foi formado pela ausência ou presença de inoculação das sementes com A. brasilense. O segundo pela fertilização nitrogenada nas doses de 70 e 140 kg ha-1 (50 e 100% respectivamente). O terceiro fator pela aplicação via pulverização foliar de A. brasilense nos estádios de perfilhamento, espigamento e duas aplicações, sendo a primeira no perfilhamento e a segunda no espigamento. Foram avaliados os parâmetros morfométricos ao final do estádio de espigamento, os componentes da produção ao final do ciclo. Também foram avaliadas as taxas de trocas gasosas na folha bandeira e teores dos macronutrientes N, P e K em folhas e grãos. Pode-se concluir que A. brasilense, aplicado via pulverização foliar, promove incrementos em comprimento médio de entrenós, comprimento médio de espigas, massa da matéria seca de folhas, espigas e raízes, volume de raízes e teor de nitrogênio nas folhas. As medidas de trocas gasosas e teor de nutrientes nas folhas foram influenciadas positivamente apenas pela maior dose de nitrogênio

The Kingdom of Saudi Arabia (KSA) is a wealthy country but faces multiple economic and social challenges. Economically, the country depends almost entirely on a single natural resource i.e. oil, which will be eventually exhausted. About sixty seven percent of Saudi’s native population is under 30 years of age and about 30 percent of 15-29 years old Saudis are unemployed. The country thus needs to diversify its economy and create job opportunities for its young unemployed population. A way forward in this regard could be supporting and promoting young people to engage in economic and entrepreneur activities, which could be facilitated by entrepreneurship education. Entrepreneurship has long been considered as a driver of innovation, a generator of employment opportunities and a potential wealth creator for both individuals and organisations. Academic literature supports the belief that with appropriate entrepreneurship education the number of would-be entrepreneurs can be increased. This study investigated the impact of entrepreneurship education programmes (EEPs) on entrepreneurial attitudes and intentions amongst university students in the KSA. The conceptual model tested in this research was based on the Theory of Planned Behaviour. Based on a quantitative approach, a self-administered questionnaire was distributed to two groups: participants studying entrepreneurship courses as part of their degrees (to be known as EEPs Group) and participants not undertaking any entrepreneurship studies as part of their courses (Control Group). The data collection took place at the beginning of the semester (Pre-test/t1) in April 2010 and at the end of the semester (Post-test/t2) in July 2010. After screening, a final matched sample of 491 completed questionnaires for the EEPs Group and 184 for the Control Group was used for data analysis. The results of this empirical study revealed that the intention to become self-employed was positively and significantly correlated to attitudes regarding self-employment, to subjective norms and to perceived behavioural control. However, for entrepreneurial education, the intention to become self-employed was neither positively nor significantly correlated with new business start-up activities. For policy-makers in KSA, the study provides useful insights into the situation of entrepreneurship education, will aid planners in universities and the KSA government to address unemployment of young by creating greater entrepreneurial awareness, and thus, hopefully, jobs through entrepreneurship activities. This study has confirmed that EEPs has a significant contribution in developing entrepreneurial attitudes among university students. Thus, entrepreneurial skills could be inculcated in the younger Saudi generation early on in their lives by institutionalising enterprising and entrepreneurship knowledge, skills and culture through education and learning starting from the high school level to the university level. In addition, there is a need for changing behaviour and intentions towards, and creating awareness about, entrepreneurship and self-employment among Saudis using different channels of communications such as the electronic media including the social media.

En raison de leur capacité à former une symbiose avec des bactéries du sol appelées Rhizobium, ces bactéries fixent l’azote atmosphérique et leurs plantes-hôtes n’ont donc pas besoin de fertilisant azoté, les légumineuses jouent un rôle important dans l'agriculture. En outre, certaines souches de Rhizobium ont la capacité de solubiliser le phosphate, fournissant ainsi du phosphore assimilable aux plantes hôtes. Une aptitude à lutter contre certains agents pathogènes a aussi été démontrée dans plusieurs études. La présente étude évalue l’efficacité symbiotique de rhizobiums tunisiens, leur capacité à solubiliser le phosphate, et leur aptitude à lutter contre la verticilliose ainsi que d’autres champignons pathogènes chez Medicago truncatula. Trente-six isolats de rhizobiums prélevés sur des nodules racinaires de M. truncatula provenant de différentes régions de Tunisie ont été obtenus pour ce travail. Environ 60% de ces isolats étaient capables de solubiliser le phosphate in vitro. Dans une seconde étape, trois rhizobiums solubilisant le phosphate et un isolat incapable de solubiliser le phosphate in vitro ont été utilisés pour des essais en phytotron afin de voir l’effet de la présence des rhizobiums sur les paramètres de croissance des plantes en présence de phosphate inorganique sous forme de CaHPO4 et rocheux sous forme brute. Les résultats de l’essai montrent que les plantes de la lignée A17 traitées au CaHPO4, ont tendance à produire plus de nodules et de biomasse aérienne que la lignée F83005.5 et que la forme du phosphate utilisé, soluble ou non soluble, affecte les paramètres étudiés. L'inoculation de quatre lignées de M. truncatula avec 16 isolats de rhizobium sélectionnés auparavant a montré une interaction significative entre les isolats et les lignées pour la symbiose visible par la formation de nodules. Tous les isolats de rhizobium testés ont augmenté la biomasse aérienne des plantes, réduit la biomasse racinaire et entraîné une teneur plus élevée en azote mais l’effet dépendait de l’isolat de rhizobium et de la lignée de M. truncatula utilisés. Enfin, ces isolats ont été testés pour leur capacité à protéger des plantes de M. truncatula contre une maladie racinaire, la verticilliose. Des activités antagonistes in vitro contre divers champignons pathogènes dont Verticillium et Fusarium ont également été recherchées permettant d’identifier un isolat efficace pour la lutte biologique. Les résultats de cette étude suggèrent que des isolats de rhizobium sélectionnés pourraient être utilisés comme biofertilisants dans les sols pauvres pour réduire l'utilisation d'engrais chimiques azotés et phosphorés mais pas pour lutter contre la verticilliose. / Because of their ability to form a symbiosis with soil bacteria called Rhizobium, legumes play an important role in agriculture. These bacteria fix atmospheric nitrogen; hence their host plants do not need nitrogen fertilizers. In addition, some strains of Rhizobium have the ability to solubilize phosphate, thus providing phosphorus to host plants. An ability to control certain pathogens has also been demonstrated in several studies. The present study evaluates the symbiotic efficiency of Tunisian rhizobia, their ability to solubilize phosphate, and their ability to control Verticillium wilt and other pathogenic fungi in Medicago truncatula. Thirty-six rhizobial isolates were obtained from root nodules of M. truncatula from different parts of Tunisia were used in this work. About 60% of these isolates were able to solubilize phosphate in vitro. In a second step, three phosphate solubilizing rhizobia and one isolate unable to solubilize phosphate in vitro were used for phytotron assays to see the effect of the presence of rhizobia on plant growth parameters in the presence of soluble and insoluble forms of phosphate. The results of the experiment show that A17 plants treated with CaHPO4, tend to produce more nodules and shoot biomass than F83005.5 and that the phosphate form used, soluble or non-soluble, affects parameters studied. Inoculation of four M. truncatula lines with 16 previously selected rhizobial isolates showed significant interaction between isolates and lines for symbiotic abilities as visualised by nodule formation. All rhizobial isolates tested increased above-ground biomass, reduced root biomass, and increased nitrogen content with strains effects of plant genotype and bacterial isolate. Finallly, these isolates were tested for their ability to protect M. truncatula plants against Verticillium wilt, and to inhibit the growth of pathogenic fungi such as Verticillium and Fusarium in vitro. However, no isolate could be identified as effective for biological control. The results of this study suggest that selected rhizobial isolates could be used as biofertilizers in poor soils to reduce the use of nitrogen and phosphorus fertilizers but not to control Verticillium wilt.

Resumo: O cultivo intensivo agrícola, apesar de altamente produtivo, possui diversos pontos questionáveis, como suplementação acentuada de insumos sintéticos, além da aplicação de defensivos para o controle de pragas que muitas vezes são danosos ao meio ambiente. Como alternativa, a agricultura orgânica propõe uma forma de manejo menos agressiva, que promove o uso sustentável dos recursos naturais renováveis, como o aproveitamento de resíduos orgânicos, além de possuir um maior valor agregado no produto final. No presente estudo, investigamos por meio de uma abordagem metagenômica os efeitos do manejo (orgânico ou convencional) na microbiota da rizosfera de cana-de-açúcar, região da planta que notoriamente causa um grande impacto no seu desenvolvimento e produtividade. Identificamos a abundância maior na rizosfera com manejo orgânico de porções genômicas que codificam enzimas associadas ao metabolismo do nitrogênio e enxofre, sendo que estes são nutrientes fundamentais para o sucesso da planta e assim, seu desenvolvimento e produtividade em campo. Contraditoriamente, encontramos também que os genomas da microbiota orgânica possuem conteúdo ligado a um potencial mais acentuado para a degradação de compostos xenobióticos, que são ativamente aplicados no manejo convencional. De acordo com nossa predição, os microrganismos dessa microbiota poderiam realizar sua completa mineralização, o que é muito favorável na remoção desses resíduos no ambiente. Esses achados indicam que há um potencia... (Resumo completo, clicar acesso eletrônico abaixo) / Abstract: Modern industrialized agriculture although highly productive, has several sustainability problems such as the for intense supplementation of synthetic inputs, beyond the application of pesticides for pest control. Which are often harmful to environment. As an alternative to this system, organic agriculture is considered more environmentally progressive, having several characteristics favorable to the crop producer, promotes sustainable use of renewable natural resources, such as the use of organic waste, besides that a higher aggregated value in the final product. This study investigates the changes that an organic system brings when compared to conventional management for the sugarcane rhizosphere microbiome, a plant region known to be determinant of plant development and associated with net productivity, using a metagenomic approach. We identified a higher abundance of genomic portions which encode enzymes associated with nitrogen and sulphur metabolism, which are fundamental nutrients for plant success and subsequently, crop productivity. Conversely, we also found that genomes of the organic microbiome contain higher portions linked to xenobiotic degradation, compounds that are actively applied in conventional management. Microorganisms from this sequenced microbiome could perform complete mineralization of these damaging compounds, which is desirable in their removal from the environment. These findings indicate that there is a unique potential for exploitation of organic... (Complete abstract click electronic access below) / Mestre

The research reported here provides an introduction to a theoretical model of socio-affective competence. This conceptual model of social effectiveness consists of four competencies that are related to the development of effective interpersonal relationships in the workplace. These competencies include: establishing rapport, promoting acceptance of differences, developing trust and cultivating charismatic influence. The socio-affective competence model was formulated in an attempt to integrate research on social and emotional skills that have been linked to performance in organizations. The current research proposed the model and defined its competency areas, designed a socio-affective competence situational judgment test (SAC-SJT), identified the variables that were theoretically related and unrelated to the construct, and provided initial evidence in support of the criterion-related validity of the socio-affective competence framework. Results from two different studies established the foundation of the socio-affective competence nomological network and demonstrated the predictive validity of the SAC-SJT on job performance, relational behaviors, and organizational citizenship performance. The author discusses the benefits of developing interpersonal relationship skills and the relevance of these findings in organizational settings.

Les agents permettant de créer des dommages sur l'ADN sont principalement utilisés dans les traitements contre le cancer. L'activation de points de contrôle du cycle cellulaire après lésion de l'ADN entraîne un arrêt du cycle des cellules. De la connaissance des mécanismes moléculaires de l'arrêt du cycle cellulaire par ces points de contrôle dépend l'efficacité du traitement. Dans les cellules humaines, ces points de contrôle sont primordiaux puisque leur inactivation entraîne la carcinogenèse (génération de cancers). Après traitement par des agents chimiothérapiques et des rayons X, les cellules s'arrêtent en phase G-1 et G-2/Mitose (M) du cycle cellulaire. Si de nombreuses études ont permis de clarifier les mécanismes de l'arrêt en phase G-1 pour des cellules dont l'ADN est endommagé, peu de données sont disponibles concernant l'arrêt en phase G-2/M. Parmi ces points de contrôle, le point de contrôle G-2/M est particulièrement important car il prévient l'entrée en mitose (phase M) des cellules dont l'ADN est endommagé. <br /> Nous avons analysé le rôle du complex appelé APC (Anaphase-Promoting Complex) dans les points de contrôle G-2/M après lésion de l'ADN. Les lésions de l'ADN sont induites dans les cellules synchronisées en phase S. Suite à ces dommages, les cellules montrent un retard et s'arrêtent en phase G-2 avec 4N chromosomes. Afin d'identifier les bases biochimiques de l'arrêt en G-2/M après traitement avec des agents endommageant l'ADN, nous allons concentrer notre recherche sur un complexe composé de multiples protéines possédant une activité de ligation de l'ubiquitine de type E3 (ubiquitin-ligase E3). Ce complexe APC est necessaire pour la dégradation des inhibiteurs d'entrée en anaphase, cyclins mitotiques, et plusieurs kinases mitotiques pour la complétion de la sortie de la mitose. Nous avons analysé et déterminé que l'absence d'activité du complexe APC inhibe l'activation du point de contrôle G-2/M lors de dommages de l'ADN.

<p>The aim of this study was to examine how some Swedish school counsellor’s describe their school social work and how they look at its content. Further more the aim is to look at what restraining and promoting factors the school counsellor’s experience in their working situation. The approach of the study is qualitative and interviews have been made with five school counsellors. The results show that school counsellors have a variety of different working-areas, which consist of supporting and consulting pupils, parents and teachers through dialogue. Another assignment is to work preventive with groups and classes. Other scientists have found similar results as the ones in this study. About restraining and promoting factors in their work, the school counsellors expressed, for example, time and resources as restraining factors and as promoting factors they mentioned closeness to the pupils and working preventive. Their offices were mentioned being both a restraining and promoting factor due to the central activity of dialogue. They expressed that they were all satisfied with their work, but that it would be enough to work full-time on just one school. To analyse the results the time-geographic perspective was used.</p>

<p>The perspective on health among school pupils needs to be extended. School is animportant arena for the promoting of health among youth, primarily from a healthpromoting perspective and a proactive perspective. A holistic approach has gatheredsome ground in the policy documents for the nine year compulsory school in Sweden, butin what way, and what effect does it have on the governing authorities and on schoollevel?The aim of the study is to investigate the coherence between national, municipal andlocal levels regarding the view on health among pupils. In order to do this, the guidelinesfor pupil health in the municipality of Örebro and operational plans for seven F9 schoolsin the municipality of Örebro will be studied and compared to the government bill”Health, learning and sense of security”. In order to obtain a theoretical understanding ofthe course of events between the different organizational levels, intervention theory hasbeen used as an explanatory model.Through analysis of the municipal guidelines for youth and pupil health, shows that thedocument very much resembles the government bill, which becomes apparent through thesame abstract formulations used. The content of the operational plans, particularly thequestion of preventing ill-health, therefore generally stays on an abstract level as well.Consequently, no concrete measures are taken on school level.From what the government bill emphasizes, the strongest reflection in the operationalplans is the point of quality control in the pupil health work and the participation ofparents. The operational plans are influenced by documents that describe how the pupilhealth work is to be organized, but there is still no policy document available for pupilhealth on local school level that includes health promoting and preventive measures. Thusthe schools lack the tools needed to tackle ill-health from a holistic point of view.However, several measures are available when it comes to reactive measures such asbullying and abusive behaviour.</p> / <p>Det finns ett behov av en utvidgad syn på elevhälsa som uppmärksammar fler aspekter avhälsa. Skolan är en viktig arena för arbetet med barn och ungdomars hälsa, inte minstutifrån ett hälsofrämjande och förebyggande perspektiv. I de dokument som styr skolanhar ett helhetsperspektiv på elevers hälsa fått ett allt större utrymme men på vilket sättoch vad innebär det, från de styrande organen för skolan och ner till personalen som skabemöta eleverna?Syftet med studien är att undersöka överensstämmelsen mellan en nationell och enkommunal och en lokal nivå vad gäller elevhälsa. Konkret innebär det att granska Örebrokommuns riktlinjer för barn- och elevhälsa och sju verksamhetsplaner för F9-skolor iÖrebro kommun utifrån regeringspropositionen ”Hälsa, lärande och trygghet”. För att fåen sammanhängande teoretisk beskrivning av skeendet mellan de olika organisatoriskanivåerna har en interventionsteori används som förklaringsmodell.Det som framkommit genom analys av det kommunala dokumentet är att det i stort ärväldigt likt propositionen, vilket bland annat innebär att det som formulerats i abstraktaordalag i propositionen sällan formuleras mer konkret i kommunens riktlinjer. Det somblir skrivet i verksamhetsplanerna, i synnerhet det som rör att förebygga psykisk ohälsa,blir därför också i vissa fall bara till abstrakta målformuleringar som aldrig tar form ikonkreta åtgärder eller insatser.Det som starkast avspeglas i verksamhetsplanerna utifrån det som framhålls ipropositionen är vikten av att kvalitetssäkra elevhälsoarbetet och att arbeta med eleversoch föräldrars delaktighet. Till stor del formas verksamhetsplanerna utifrån dokumentsom konkret beskriver hur arbetet med elevhälsa ska bedrivas, dock finns det inte någotelevhälsodokument på lokal nivå som generellt beskriver ett förebyggande ochhälsofrämjande arbete. Således har skolorna få verktyg för att angripa ohälsa ur etthelhetsperspektiv. Däremot finns det ett flertal specifika åtgärder till redan befintligproblematik, likt mobbning och kränkande behandling.</p>

<p>Language diversity continues to create a language barrier to international tourism. Tourists from non-English speaking countries face a language barrier in South Africa and this affects their experiences in the country. Measuring and understanding something of this challenge is the purpose of this study. The focus is on how the tourism industry in Cape Town uses languages to sell and promote the city internationally. The study investigates procedures, strategies, and policies adopted by the tourism industry in Cape Town to cater for tourists from across the world. In addition, the study also investigates how tourists from non-English speaking countries adapt linguistically to cope with their stay in Cape Town. The study targeted both tourism organisations and international tourists who use tourist facilities in most popular tourist areas in Cape Town. Both primary and secondary data were collected. Convenience sampling was used to select both tourism service providers and tourists. To enhance validity, reliability, and accuracy, various tools have been deployed to collect the data. Primary data were collected from both tourism service providers and international tourists using questionnaires, interviews, photographs and observations. Secondary data collection involved observations of public signage as well as analysis of electronic and printed promotional materials such as brochures, guidebooks, menus, newspapers and websites. Collected data were captured in spread sheets to enable descriptive analysis of tourists&rsquo / languages and of language use in tourism organisations in different of forms of niche tourism in Cape Town. Survey results reveal that a little more than half of all surveyed tourism organisations in Cape Town sell and promote their products using only South African languages including English whilst a minority sell and promote their products using English coupled with foreign languages. The majority of multilingual staff in those surveyed tourism organisations who have adopted multilingualism are working part-time or employed temporarily. In addition, results also indicate that English dominates other languages in public signs and printed and electronic promotional publications used by surveyed tourism organisations in Cape Town. Foreign languages are used most in tour operations and travel agencies sector whilst South African languages dominate in accommodation and restaurants sectors. On the other hand the research shows that a big proportion of foreign tourists in Cape Town were able to speak English and other foreign languages. The research shows that the majority of tourists from non-English speaking countries are more interested in learning foreign languages compared with their counterparts from English speaking countries. Only less than a quarter of all surveyed tourists from non-English speaking countries in Cape Town are monolingual in their home languages. These tourists struggle to communicate with service providers in Cape Town. Translators and gestures were used by non-English speaking tourists as a way of breaking down communication barriers in Cape Town. Contrarily, a big proportion (two thirds) of all surveyed tourists from English speaking countries in Cape Town does speak only English. Foreign tourists in Cape Town speak tourism service providers&rsquo / language rather than tourism service providers speaking tourists&rsquo / languages. The majority of tourism service providers in Cape Town are reluctant to learn foreign languages and to employ multilingual staff. This means that most tourism organisations sell and market their product in English only. Other South African languages such as Afrikaans and Xhosa are used frequently in informal communication in the tourism industry in Cape Town. Seemingly, Afrikaans dominates Xhosa in all forms of tourism except in township tourism where the majority of service providers are Xhosa-speakers. To market and promote Cape Town internationally, the tourism industry in Cape Town should employ multilingual staff who can communicate in tourists&rsquo / native languages. Multilingualism should be practised in all tourism sectors rather than in one or few sectors because all tourism sectors compliment each other in meeting customer&rsquo / s satisfaction. Failure in one tourism sector may affect other tourism sectors&rsquo / performance.</p>

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