Atmospheric CO₂ enrichment is employed by greenhouse tomato growers to increase fruit yields, and CO₂ applications are managed according to atmospheric set points or CO₂ injection rates. These methods do not immediately focus on the targets of CO₂ applications: plant performance and the regulation of plant carbon status. This thesis explores several plant-based approaches that may have potential for use in the management of CO₂ in greenhouse tomato production. Three plant-based approaches to CO₂ management were explored in commercial and experimental tomato greenhouses. These were: (1) simulation modeling, (2) non-destructive analysis of growth and (3) the status of plant carbon reserves. A cost and benefit analysis (c/b) using simulation modeling was carried out using grower-collected greenhouse environment and yield data. Simulation modeling was useful for retrospectively determining c/b of several CO₂ scenarios. The model was effective in predicting long term yields, but not short term yield variations, which limits its application for CO₂ management. Non-destructive measures of growth: stem length and diameter, leaf area and fruit load were found to be too sluggish for daily CO₂ dosing decision-making. Finally, plants growing under CO₂ enrichment can deposit substantial carbon as starch in their leaves. Plant carbon status was evaluated by determining the spatial distribution of leaf starch in the shoot and by following its variation diurnally and after the onset of CO₂ enrichment. As starch is difficult to measure by a grower, leaf mass per unit area (LMA) was also monitored for assessment as a surrogate measure for starch. Leaves in positions 7 to 9 were identified as the most meaningful in the shoot to sample. Diurnal profiles indicated these leaves carryover substantial starch from one day to the next. Monitoring starch at its peak time of accumulation (14 h to 16 h), at sunset and sunrise will indicate how much the peak starch reserves are used overnight. If starch remains high between peak and sunrise the following day, then the plants are in a carbon-surplus state and CO₂ enrichment could be postponed. For upper canopy leaves LMA is substantially influenced by starch and thus is a promising surrogate. / Land and Food Systems, Faculty of / Graduate

Le quasi-contrat est consacré comme une source autonome d’obligation dans le code civil. Pourtant, l’unité de la notion est problématique. En effet, la loi définit le quasi-contrat comme un fait volontaire dont il résulte un engagement alors que la doctrine le présente comme une notion à mi-chemin entre le contrat et la responsabilité civile extra-contractuelle en raison de l’application du régime contractuel en dehors d’un accord de volontés des parties. Or, en pratique, hormis la gestion d’affaires qui obéit au régime du mandat sans pouvoir exprès, l’enrichissement sans cause, (désormais enrichissement injustifié) et la répétition de l’indu n’obéissent pas à un régime contractuel. Si la doctrine a tenté de proposer le critère du transfert de valeurs dépourvu de cause pour justifier l’unité de la notion, ce critère se trouve mis à mal par la jurisprudence sur les loteries publicitaires. La thèse tente ainsi de rechercher une nouvelle unité, recherche qui s’avère difficile, voire impossible, dans la mesure où chaque quasi-contrat répond à des règles tantôt propres au contrat, tantôt propres à la responsabilité civile extra-contractuelle, ce qui vient alors fausser l’autonomie du quasi-contrat / Quasi-contracts are set as an autonomous part of the civil code, yet the notion answers to no unity. Law defines the notion as a voluntary fact leading to bind its author but scholars are considering quasi-contracts to be halfway between contract law and tort law due to the lack of will leading nevertheless to binding obligations. Practice shows that, except for the business management based on a mandate without any express will, the other quasi-contracts, unjust enrichment and repetition of undue do not follow any contractual regime. Scholars have attempted to propose the transfer of value for explaining the unity of the notion but this criterion is no longer relevant since cases creating a new quasi-contracts: lotteries. This work aims to discover a new criterion to find back unity of quasi-contracts. Impossible task as each quasi-contract shares common aspects of contract law and of tort law

La considération de la langue et de l’écriture comme codes sémiotiques en contact devrait logiquement découler de l’affirmation saussurienne : « Langue et écriture sont deux systèmes de signes distincts ». Au même titre que les langues en contact, le contact entre la langue et l’écriture est propice au transfert sémiotique réciproque. L’acquisition de l’écrit induit un changement cognitif radical et l’apparition de l’écrit dans une communauté linguistique modifie son organisation. L’empeinte plus forte du stimulus visuel par rapport à celle du stimulus auditif et le prestige qu’accorde la maîtrise de l’écrit sont les facteurs cognitif et social privilégiant le transfert sémiotique de l’écriture vers la langue. Sur le plan lexical, une tradition scripturale accompagnée d’une orthoépie [règles de lecture à haute voix] fournit à la langue des mots venus d’autrefois et d’ailleurs, comme les emprunts savants aux langues classiques et les emprunts graphiques entre des langues sans contact communautaire. Des mots graphémiques sans origine linguistique sont également vernacularisés, comme la lexicalisation d’abréviations. La vernacularisation d’éléments scripturaux enrichit la langue. Un cas particulièremnt extrême est celui de la naissance de l’hébreu moderne parlé – l’hébreu littéraire non vernaculaire du début du 20e siècle en est la source principale. Sur le plan phonologique, l’orthoépie peur modifier la phonologie comme le montre l’apparition de groupes consonantiques en français. Sur le plan sémantique l’écrit peut être à l’origine d’une réorganisation des signifiés en fonction de l’orthographe ; de nombreuses figures de style sont inspirées par les propriétés de l’écriture. / The study of writing and language as semiotic codes in contact should have logically followed from the Saussurian statement: “Language and writing are two distinct systems of signs”. On the same theoretical basis as that of contact linguistics, the contact between language and writing might be conducive to mutual semiotic transfer. The acquisition of writing induces a radical cognitive change and the emergence of writing within a linguistic community modifies its organisation. The greater physical force of the visual stimulus as against aural stimulus and the high prestige gained by the mastery of writing are the cognitive and social factors that favour semiotic transfer from writing to language. With regard to lexicon, a writing tradition accompanied by an orthoepy [rules of reading aloud] provides the language with words from afar in place and in time, like learned words from classical tongues and graphic loanwords between languages whose linguistic communities are not in direct contact. Graphemic words with no linguistic provenance are also vernacularised, like the lexicalisation of abbreviations. The vernacularisation of written elements enriches language. A particularly extreme case of vernacularised written sources is that of the emergence of spoken Modern Hebrew – literary non vernacular Hebrew of early 20th century being its main source. On the phonological level, orthoepy may modify phonology, as can be shown by the emergence of consonantal clusters in French and of - et #952;- in author in English. On the semantic level, writing may be the source of the reorganisation of the signifiés based on spelling; numerous figures of speech are inspired by the attributes of writing.

Abstract The aim of this work was to assess and improve the enrichment cultivation of food-contaminating bacteria prior to detection by means of RNA-based sandwich hybridization assay (SHA). The examples of beer-spoiling lactic acid bacteria (LAB) and food-borne Salmonella Typhimurium were selected based on their relevance in Finnish food industry. Also universal challenges affecting on the selection of the enrichment cultivation procedure are discussed, including some potential possibilities for improved enrichment cultivation. The results of this study may therefore be used for the assessment of the efficiency of bacterial cultivation in other applications. The evaluation of the enrichment cultivation procedures prior to SHA lead to following conclusions: i) the enrichment cultivation procedure is necessary prior to rRNA-based SHA, and it directly influences the accuracy of SHA; ii) the improvement of the enrichment cultivation may allow faster recovery and growth of bacteria; iii) the improved recovery of bacteria can be achieved by reducing environmental stress factors in the enrichment culture; and iv) the growth of bacteria may be accelerated by assuring the selectivity of medium and allowing accessibility to growth factors. Several growth factors were studied by means of full factorial design and response surface modeling. Measured cell densities, as well as predicted lag-times and maximum growth rates in the bacterial cultures were used as responses. The results show that small shifts in the cultivation conditions extend the lag-time and decrease the growth rate of both LAB and Salmonella. Besides adjusting the temperature and pH, the growth of LAB was facilitated by reducing osmotic and oxidative stresses in the enrichment medium. In this study, a novel enzyme controlled glucose delivery system was used for the first time in the enrichment cultivation of food-contaminating bacteria. The glucose delivery system improved the growth of LAB in single strain cultures and in actual brewing process samples. The recovery of injured Salmonella was also enhanced by using the glucose delivery system together with selective siderophore ferrioxamine E, both in terms of reduced lag-times and increased growth rates. Based on the SHA, the adjusted BPW broth enhanced the molecular detection of heat-injured Salmonella in meat.

This thesis analyses the concept of unjust enrichment under the business law. First of all the thesis explains the term of business law. Business law is a complex of legal rules concerning the contractual relationships between entrepreneurs arising from their business activities. Business law is a comprehensive field of law which extends into many other fields of law, both private and public law. Equally the regulation of unjust enrichment within the business law expands into many other laws with particular specialization, but these laws are not subject of this thesis. For these laws the subsidiary legislation is included in the civil code., therefore this thesis focuses on the general regulation of unjust enrichment included in the civil code. Further the thesis continues with a historical development of both business law and unjust enrichment. The historical view begins with roman law, continues with the regulation of unjust enrichment under the ABGB and ends with regulation under the so. socialist law. Further in the text is referred to the historical chapter to facilitate understanding of a present regulation. Next chapter of the thesis describes the current regulation of unjust enrichment, mainly under the civil code, and from the reason mentioned above it is not going into the particular...

The thesis analyses the legal concept of unjust enrichment in business law. General legal regulation of unjust enrichment itself has never been included in Commercial Code though it had to be interpreted according to the general regulation contained in the Civil Code. This conception remained unchanged even after the re-codification of civil law, which abolished the Commercial Code, thus we no longer need to differentiate between legal relationships which are of a commercial nature and those which are not. The conclusions reached by the Supreme Court in correlation with the previous legislation cannot be completely abandoned - based on the transitional provisions of the Civil Code - the preceding legislation, and therefore the conclusions of the case law relating thereto, remain applicable. The thesis analyses unjust enrichment, mainly from the perspective of civil law. The commercial aspect is provided in comparison to the previous legislation which focuses on the specifics or application problems in relation to unjust enrichment that have arisen in commercial law. For this purpose, the thesis deals with related legal concepts such as limitation of claims resulting from unjust enrichment, the invalidity of legal acts, etc. The thesis consists of five chapters. The first chapter analyses the...

Kyoto University (京都大学) / 0048 / 新制・課程博士 / 博士(工学) / 甲第15580号 / 工博第3292号 / 新制||工||1497(附属図書館) / 28101 / 京都大学大学院工学研究科社会基盤工学専攻 / (主査)教授 杉浦 邦征, 教授 田村 武, 准教授 宇都宮 智昭 / 学位規則第4条第1項該当

No description available.

Philosophiae Doctor - PhD (Biotechnology) / Availability of genome sequences for numerous bacterial species comprising of different bacterial strains allows elucidation of species and strain specific adaptations that facilitate their survival in widely fluctuating micro-environments and enhance their pathogenic potential. Different bacterial species use different strategies in their pathogenesis and the pathogenic potential of a bacterial species is dependent on its genomic complement of virulence factors. A bacterial virulence factor, within the context of this study, is defined as any endogenous protein product encoded by a gene that aids in the adhesion, invasion, colonization, persistence and pathogenesis of a bacterium within a host. Anecdotal evidence suggests that bacterial virulence genes are undergoing diversifying evolution to counteract the rapid adaptability of its host’s immune defences. Genome sequences of pathogenic bacterial species and strains provide unique opportunities to study the action of diversifying selection operating on different classes of bacterial genes. / South Africa

The feeding ecology of a common saltmarsh crab, Armases cinereum (Armases), was investigated to determine how habitat (mangrove vs. ecotone, natural mangrove vs. modified mangrove fringe) influenced this species’ feeding behavior and trophic ecology in its southwestern Florida, USA, distribution. In the laboratory, Armases’ preference for mangrove material was examined using leaves of three mangrove species (Avicennia germinans, Laguncularia racemosa, and Rhizophora mangle) and leaves of different degradation levels (fresh, senescent, and partially-decomposed). Leaf material from A. germinans was preferentially consumed over the other taxa at fresh and partially-decomposed levels of leaf decay. When Armases were offered a choice between four common upland vegetation types (Iva frutescens, Borrichia frutescens, Nephrolepis biserrata, and Stenotaphrum secundatum), the preferred mangrove from the previous experiment (A. germinans, partially-decomposed), and an animal prey item (Gryllodes sigillatus, cricket), Armases displayed greatest selectivity for the animal prey item and high selectivity for both I. frutescens and A. germinans plant taxa (Manly-Chesson α selectivity and Chesson ϵ electivity). Field-based stable isotope analysis was used to determine trophic position and reconstruct dietary proportions of Armases across three pairs of natural and heavily-modified sites within Tampa Bay to determine whether Armases feeding behavior is impacted by the presence of upland forest adjacent to mangrove forest habitat. Analysis of trophic position based on δ15N signatures of Armases from each of the six populations revealed that Armases in habitats with modified connectivity had lower trophic variability and significantly higher average trophic position compared to Armases sampled from the three sites with natural connectivity. Stable isotope diet reconstruction using the Bayesian mixing model SIMMR further established Armases preference for animal-derived food material in habitats with natural and modified connectivity. This preference is likely driven by high selectivity for sources rich in Nitrogen (i.e., animal tissue, partially-decomposed A. germinans material, and I. frutescens). I determined that the use of laboratory experiments in conjunction with stable isotope mixing models is important in accurately investigating feeding preferences of Armases in mangrove intertidal regions. Together, my results show that the diet of Armases is broadly omnivorous and populations can be influenced by the heterogeneity of their habitat. Further feeding experiments, dietary analyses and a longer sampling period are needed to more definitively identify the patterns of Armases detritivory in mangrove and ecotonal upland habitats.