Inaug.-diss.--Halle-Wittenberg. / Lebenslauf. "Literaturverzeichnis": p. 108-121.

Inaug.-diss.--Halle-Wittenberg. / Lebenslauf. "Literaturverzeichnis": p. 108-121.

Thesis--University of Wisconsin--Madison. / Typescript. Vita. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references.

Mastocarpus stellatus et Gracilaria gracilis sont des algues rouges présentes à la fois sur les côtes atlantiques françaises et vietnamiennes. Elles constituent une biomasse disponible et valorisable au travers de leur pigment la R-PE. L’objectif de ce travail est d’une part d’acquérir des connaissances sur la composition biochimique de ces macroalgues et d’autre part d’optimiser les paramètres d’extraction de la R-PE à partir de ces deux modèles d’étude. Ainsi, deux méthodes d’extraction ont été mises en œuvre: la macération classique (eau, tampon) et l’extraction assistée par enzyme (cellulase, xylanase, B-glucanase). Le prétraitement de l’algue a aussi été étudié. Les meilleurs rendements d’extraction de la R-PE ont été obtenus à partir des algues lyophilisées et cryobroyées en mettant en œuvre le génie enzymatique. L’utilisation des plans d’expérience utilisant la méthodologie des surfaces de réponse ont permis d’optimiser les conditions d’hydrolyse (température, pH, rapport E/S). L’enzyme ainsi que les conditions d’hydrolyse différent selon l’espèce. Parallèlement, un protocole de purification par chromatographie échangeuse d’anions a permis d’obtenir un pigment concentré et purifié (IP = 3,25) à partir d’un extrait de Gracilaria gracilis. / Mastocarpus stellatus and Gracilaria gracilis are endemic red seaweeds commonly funded in French Atlantic and the coast of Vietnam. They represent an available and usable biomass through the extraction of their original proteinic pigment R-Phycoerythrin. The purpose of this work was to increase the scientific knowledge on the biochemical characterization of these two species on one side. On the other side, this work dealt with the optimization of the extraction parameters of the R-PE. Hence, two extraction procedures have been compared: conventional maceration (with investigation of extracting solution) and enzymatic-assisted extraction (cellulase, xylanase, B-glucanase). Algal prior treatment has also been studied. Highest R-PE extraction yields have been obtained when enzymatic-assisted extraction had been employed on cryo-ground seaweeds. The use of response surface methodology analysis allowed to improve simultaneously the hydrolysis conditions (temperature, pH, E/S ratio) and the purity and extraction yields of R-PE. Finally, a one-step chromatographic method by anion-exchange chromatography had been developed to obtain a concentrated and purified (PI = 3.25) pigment from Gracilaria gracilis.

The purpose of this study is to determine the perceptions of parents of Grade R children regarding teaching and learning. This will be compared to relevant education theories and the Foundation Phase curriculum and assessment policies to establish whether parents’ perceptions of Grade R teaching and learning differ from prescribed policy, and that which is age-appropriate. This study is based on qualitative methodology and uses a single case study approach. The case identified is located in the suburb of Westville in the Pinetown School District. Open-ended questionnaires, semi-structured interviews, and document analysis were used for data collection. Ten parents of Grade R children from two ECD centres were purposively selected to respond to the questionnaire. The two Grade R teachers from each centre were also interviewed. A document analysis of the Mathematics, English Home Language, and Life Skills curriculum and assessment policies was also conducted. The findings revealed that parents’ perceptions regarding Grade R teaching and learning significantly differed in relation to current literature and prescribed curriculum policies. Parents’ expectations of the curriculum also exerted pressure on teachers and children, thus it is recommended that parents become au fait with the use of play as an appropriate teaching and learning strategy in the informal Grade R year. / Curriculum and Instructional Studies

The aim of the thesis is to analyse and understand resolution, repeatability and reproducibility of the measurement system for package distance. The measurement system for package distance is already in use, no Gage R&R has been performed on the system and before spreading use of the system the quality of the system has to be understood and approved / Detta examensarbete utfördes våren och sommaren 2013 på Tetra Pak PackagingSolutions AB, Carton Economy. Huvudsakligt syfte var att analysera repeterbarhet ochreproducerbarhet samt sätta upp godkännande kriterium för mätsystemets upplösningvid mätning av förpackningsavstånd när förpackningarna transporteras påtransportbanor banor. Analys utfördes genom Gage R&R studie på mätsystemet.Förpackningsavståndet definieras som ett krav i definierade interface mellan ingåendedelsystem i ett förpackningssystem vid vidareutveckling och nyutveckling av nyadelsystem. De förpackningstyper som ingick i Gage R&R var Tetra Fino Aseptic (TFA),Tetra Wedge Aseptic (TWA) och Tetra Classic Aseptic (TCA).Efter att godkännande kriterium satts upp och Gage R&R studien genomförts drogsslutsatsen att mätsystemet lever upp till och kan anses godkänd för mätning av TFAoch TWA förpackningar. TCA förpackningar ingår ej i detta examensarbete.

Thesis (DD(N.T.)--Universiteit van Pretoria, 2005. / Includes bibliographical references (p. 453-478)

Made available in DSpace on 2014-06-12T17:38:02Z (GMT). No. of bitstreams: 2 arquivo3821_1.pdf: 7987098 bytes, checksum: dc96bd795cfbebffffa0b7bedb4a8308 (MD5) license.txt: 1748 bytes, checksum: 8a4605be74aa9ea9d79846c1fba20a33 (MD5) Previous issue date: 2008 / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior / Os refrigerantes CFCs (clorofluorcarbonos) como o R-12, foram identificados como de alto poder destruidor da camada de ozônio que protege a superfície da terra, devido à presença de cloro em sua estrutura. Os HCFCs (hidroclorofluorcarbonos) como o R-22, por possuírem cloro em sua estrutura, também devem ser substituídos como fluidos refrigerantes. Na Europa, equipamentos novos não são produzidos com o HCFC-22, desde dezembro de 2003. Diante da necessidade de substituição desses gases nocivos ao planeta, os hidrocarbonetos (HC) apresentam-se como bons candidatos a fluidos refrigerantes alternativos, pela ausência de átomos de cloro em sua estrutura e por não destruírem a camada de ozônio. Esses fatos, aliados a um baixo potencial de causar aquecimento global, fazem dos hidrocarbonetos bons candidatos ao uso em sistemas de refrigeração. Como contribuição a esse tema, a presente dissertação analisa experimentalmente os sistemas de refrigeração por compressão a vapor de um bebedouro e de uma câmara frigorífica, representantes das classes de refrigeração doméstica e comercial, ambas de pequeno porte. Os sistemas estudados foram testados com os fluidos refrigerantes (hidrocarbonetos): propano (R-290),isobutano (R-600a) e uma mistura de ambos em substituição aos fluidos originais dos sistemas testados, o R-22 e o R-12. Todos os testes foram realizados em condições normais de operação. Os resultados experimentais indicam que a mistura propano e isobutano mostra-se como a melhor opção como fluido alternativo em sistemas de refrigeração de pequeno porte utilizadores do R-12 ou R-22. Em segundo lugar apresentou-se o R-600a. Na comparação individual, o R-600a mostrou-se como a melhor opção para sistemas de refrigeração de pequeno porte ao invés do R-290. Porém, para sistemas de médio porte originalmente projetados para R-22, o R-290 aparece como a melhor opção

Diplomová práce se zabývá hodnocením způsobilosti pracovního zařízení. V teoretické části jsou popsány metody hodnocení procesů/výrobních zařízení, metoda DOE a hodnocení způsobilosti měřících systémů. V teoretické části je popsána vlastní analýza - aplikace v praxi.

Thesis (M.A.)--University of North Texas, Aug., 2007. / Title from title page display. Includes bibliographical references.