Rozprawy doktorskie na temat „Male sheep”
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Stevenson, Ian Roxburgh. "Male-biased mortality in Soay sheep". Thesis, University of Cambridge, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.321000.
Pełny tekst źródłaZhang, Song. "Peripheral and central pathways linking metabolic status and reproduction in male sheep". University of Western Australia. School of Animal Biology, 2005. http://theses.library.uwa.edu.au/adt-WU2005.0037.
Pełny tekst źródłaFerasyi, Teuku Reza. "Mathematical model of the reproductive endocrine system in male sheep". University of Western Australia. School of Animal Biology, 2008. http://theses.library.uwa.edu.au/adt-WU2008.0080.
Pełny tekst źródłaLong, Amanda Marie. "Impacts of Flax on Female and Male Reproductive Traits When Supplemented Prior to Breeding in Sheep". Thesis, North Dakota State University, 2018. https://hdl.handle.net/10365/29877.
Pełny tekst źródłaHuxsoll, Christopher Charles. "Effect of endotoxin administration on pituitary and adrenal function in castrated male sheep immunized against adrenocorticotropic hormone /". For electronic version search Digital dissertations database. Restricted to UC campuses. Access is free to UC campus dissertations, 2002. http://uclibs.org/PID/11984.
Pełny tekst źródłada, Silva P. N. A. P. "The influence of maternal nutrition during pregnancy on the pre- and postnatal development of the reproductive axis in male and female sheep". Thesis, University of Aberdeen, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.592303.
Pełny tekst źródłaBarcelos, Brenda. "Utilização do resíduo de cervejaria na produção de silagem como alternativa para alimentação de ruminantes". Universidade de São Paulo, 2012. http://www.teses.usp.br/teses/disponiveis/74/74131/tde-19032013-095542/.
Pełny tekst źródłaIn order to evaluate the production of silage and the use of additives in the process of silage of brewery residue, they were distributed in a completely randomized design treatments 5 and 4 repetitions: C: silage 100% brewery residue; PC15: 15% of citrus pulp; PC30: 30% of citrus pulp; CS15: 15% of soybean hulls; CS30 mice: 30% of soybean hulls- added on the basis of the fresh of the residue of brewery. The silage samples were collected for the qualitative analysis, pH, buffer, ammoniacal nitrogen, IVDMD and determination of organic acids (Lactic acid, acetic acid, propionic, butyric) and microbiological profile. The Relative Biological Efficiency (RBE) was calculated by the slope ratio technique For in vivo analysis was verified the performance of the animals and digestibility.The data were analyzed by the Statistical Analysis System (SAS, 2008), whereas fixed effects the inclusion of additives and levels. The treatment average was compared by orthogonal contrasts There was an increase in the content of MS, carbohydrates and power buffer from the inclusion; increase in vivo digestibility of DM and increase of the population of lactic acid bacteria, clostridium; IVDMD, and the best results, together, for the treatment of silage with inclusion of 30% of citrus pulp.
Souza, AlethÃia CarÃzia Baracho de Lima. "Estudos sobre as interaÃÃes das proteÃnas seminais com as cÃlulas espermÃticas e componentes dos diluidores usados na criopreservaÃÃo do sÃmen e sobre marcadores moleculares de parÃmetros do sÃmen em animais de produÃÃo". Universidade Federal do CearÃ, 2014. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=12911.
Pełny tekst źródłaA tese à composta por dois capÃtulos. O primeiro capÃtulo inclui o trabalho cujo objetivo foi investigar o potencial uso de pares de transcritos correlativos baseados em microarranjos como marcadores de fertilidade masculina usando a displasia da bainha fibrosa (DFS) como modelo afetado. Atualmente à bastante reconhecido que a tecnologia de microarranjos pode ser limitada pelos custos e que a qualidade dos transcritos permanece relativamente desconhecida. Para responder essas questÃes, nÃs analizamos pares de transcritos estÃveis por qPCR com um processo sistemÃtico de desenho de primers sistemÃtico. Nesse estudo experimental, nÃs utilizamos amostras de homens com fertilidade comprovada e de homens com diagnÃtico de DFS. Nossa abordagem foi baseada nas sequÃncias de primers dos seis genes de interesse, os quais foram desenhados utilizando os programas Oligo7 e Primer3Plus. A especificidade do primer foi inicialmente analisada in silico atravÃs de pesquisas nos bancos de dados ENSEMBL, University of California Santa Cruz (UCSC), e National Center for Biotechnology Information (NCBI) para uso de sequÃncias especÃficas aos genes alvos. A habilidade dos pares de transcritos em classificar as amostras de homens de fertilidade comprovada das amostras de DFS foi avaliada. Nossos resultados mostraram que em conjunÃÃo com a identificaÃÃo de quatro novos pares estÃveis, a comparaÃÃo dos coeficientes de correlaÃÃo dos valores de C(t) dos DSF revelou a interrupÃÃo de quatro pares estÃveis identificados nas amostras de homens normais. Esta seleÃÃo de pares estÃveis resolve a questÃo sobre a DSF. Em conclusÃo, os resultados mostram efetivamente que o desenho de primers e qPCR podem fornecer um ensaio molecular de baixo custo para avaliar a fertilidade masculina. O segundo capÃtulo divide-se em dois estudos e avalia em carneiros os efeitos de uma dieta suplementada com farelo de castanha de caju. No estudo 1, nosso objetivo foi detectar a presenÃa de transcritos para Heat Shock Protein (HSP70), clusterina (CLU), proteÃna semelhante à subunidade alfa do complexo T (TCP1) e proteÃna do complexo T subunidade 8 (CCT8) no espermatozÃide de ovinos, seguindo a mesma metodologia para qPCR utilizada no capitulo 1. As sequÃncias de primers foram desenhadas utilizando os programas Primer3Plus e Oligo Analyzer. Gene para protamina 2 (PRM2) foi usado como controle interno de reaÃÃo. O sÃmen foi coletado de machos pÃberes Morada Nova utlizando eletroejaculador. As amostras selecionadas para extraÃÃo de RNA espermÃtico seguiram as recomendaÃÃes do ColÃgio Brasileiro de ReproduÃÃo Animal quanto aos parÃmetros de motilidade, vigor e concentraÃÃo. Nossos resultados mostraram a presenÃa de mRNA para a HSP70 nos espermatozÃides de ovinos. Maiores estudos sÃo necessÃrios a fim de confirmar ou refutar a presenÃa das chaperonas TCP1 e CCT8 no espermatozÃide ovino. A presenÃa do transcrito da HSP70 no espermatozÃide de ovinos abre perspectivas para estudos futuros sobre os efeitos do mRNA HSP70 no desenvolvimento embrionÃrio, de modo a avaliar se essa expressÃo ocorre de modo espontÃneo, programado e seqÃencial, e se esses mecanismos se refletem na fertilidade e no desenvolvimento embrionÃrio. O segundo estudo tem como principal objetivo avaliar os efeitos de uma dieta contendo farelo de castanha de caju (FCC) na expressÃo de genes relacionados ao metabolismo dos lipÃdios no mÃsculo Longissimus dorsi de carneiros Morada Nova. Vinte carneiros maduros sexualmente foram divididos em dois grupos baseando-se no peso vivo. Os animais foram mantidos em baias individuais. Durante trÃs meses, o grupo castanha (GCA) foi alimentado com raÃÃo contendo FCC, enquanto o grupo controle (GCO) recebeu raÃÃo à base de milho e soja. As duas dietas eram isocalÃricas e isoprotÃicas, adicionadas de suplemento mineral. Os carneiros tambÃm receberam feno de Tifton e Ãgua à vontade. A quantidade de alimento ofertado (raÃÃo e feno) foi ajustada diariamente para sobra de 10%. Sete genes codificantes de proteÃnas envolvidas direta ou indiretamente foram selecionados como alvos, incluindo: GH, ACACA, CAST, CAPN3, LPL, SCD e FASN. Para normalizaÃÃo, foram selecionados cinco genes candidatos: ACTB, GAPDH, RPL4, RPS18 e TBP. Dentre os sete genes alvos selecionados anteriormente, os alvos GH, ACACA e CAST foram removidos. Os dois primeiros foram removidos devido amplificaÃÃo de alinhamento mÃltiplo (baixa especificidade do primers), enquanto CAST apresentou baixa eficiÃncia de amplificaÃÃo. Da lista de gene alvo final, a expressÃo de somente dois genes foi afetada pela dieta, SCD (p<0.01) e FASN (p<0.05), enquanto LPL (p=0,1022) e CAPN3 (p=0,0939) nÃo apresentaram diferenÃa significativa (p<0.05). Os genes SCD e FASN foram reprimidos no GCA comparada ao GCO. Este à o primeiro relato de que uma raÃÃo contendo FCC afetou a expressÃo gÃnica de proteÃnas envolvidas na deposiÃÃo de lipÃdios no mÃsculo em ovinos. Considerando que uma dieta contendo FCC altera a expressÃo de genes lipogÃnicos sem afetar o ganho de peso nem a eficiÃncia reprodutiva de ovinos, faz da castanha de caju uma importante alternativa para o sistema de produÃÃo de ovinos criados em regiÃes tropicais.
This thesis presents two chapters. In the first chapter, its objective was to investigate the potential use of correlative microarray-based transcript pairs as candidate markers for male fertility using dysplasia of the fibrous sheath (DFS) as an affected model. It is widely recognized that microarray technology may be limited by cost and that the quality of the transcript remains relatively unknown. To address these issues, we analyzed the stable transcript pairs by qPCR with a systematic primer design process. On this experimental study, we used men with proven fertility and men with a diagnosis of DFS. Our approach was based on primer sequences for six genes of interest were designed using Oligo7 and Primer3Plus. Primer specificity was initially assessed in silico by searching the ENSEMBL, University of California Santa Cruz, and National Center for Biotechnology Information databases for nontarget complementary sequences throughout the genome. The ability of transcript pairs to classify samples from males of proven fertility away from DFS was assessed. Our results showed that in conjunction with identifying four new stable transcript pairs, comparison of the DFS qPCR C(t) correlation coefficients revealed the disruption of four stable fertile sample transcript pairs. This suite of transcript pairs resolves DFS. In conclusion, the results show that with effectively designed primers, qPCR may provide an affordable molecular assay to assess male fertility status. Second chapter includes two studies regarding evaluations of ram feeded with supplemented diet with cashew nut. On the frist study, our goal was detect transcripts for Heat Shock Protein (HSP70), Clusterin (CLU), Ovis aries T-complex protein 1 alfa subunit-like protein (TCP1) e Ovis aries chaperonin containing TCP1, subunit 8 (theta) (CCT8) on ram sperm by. For primer designing we used published ESTs from NCBI and manually annotated by us using Primer3Plus and OligoAnalizer. PRM2 was used as internal qPCR control. Semen samples from mature Morada Nova ram were collected by eletroejaculator, washed in PBS and prepared for further RNA extraction. Selected samples followed quality recommendatios from ColÃgio Brasileiro de ReproduÃÃo Animal regarding motility, vigor and concentration. Our results showed presence of mRNA HSP70 on ram sperm and they can possible be envolved in early embryo development, oocyte activation and post fertilization events. Further analyses will be necessary to confirm presence of TCP1 and CCT8 on ram sperm. Our findings indicate new perpectives about the effects of these chaperones during embryo development mesuring if its expression reflects male fertility on the early embryo development. On the second study the the main goal is to evaluate the effects of a lipid-enriched diet containing cashew nut brain on the expression of genes related to lipid metabolism in the longissimus dorsi muscle of Morada Nova rams. Twenty sexually mature and reproductively sound rams were divided in two groups based on ram live weight, and each ram was kept on individual pens. During three months, group 1 (G1) rams were fed with a lipid-rich diet, containing cashew nut bran (CNB), while group 2 (G2) was fed with a meal based on corn and soy. Both diets were isocaloric and isoproteic, and had a mineral mix added-in. The rams also were offered Tifton grass hay and had free access to water. The amount of diet offered (ration plus hay) was adjusted everyday to a maximum waste of 10%. Seven genes coding for proteins directly or indirectly involved in lipid metabolism were initially selected as targets, incluiding GH, ACACA, CAST, CAPN3, LPL, SCD, and FASN. Also, five genes were selected as reference genes, ACTB, GAPDH, RPL4, RPS18 and TBP. From the seven genes originally selected as targets, GH, ACACA and CAST were removed, leaving the final list with four targets. The first two genes were removed due to alternative pairing of the primers (low specificity), while CAST showed low amplification efficiency during PCR reaction. From the final target list, the expression of only two genes was affected by diet, SCD (p<0.01) and FASN (p<0.05), while LPL (p=0,1022) and CAPN3 (p=0,0939) were not different at the p<0.05 level. Both SCD and FASN genes were down-regulated in G1 (lipid-rich diet containing CNB) compared to G2. These genes are involved in lipogenic pathways, related to tissue lipid deposition; therefore, these results were expected. This is the first time that a fat-rich diet based on CNB was shown to affect gene expression of proteins involved in fat deposition in carcass muscles of rams. Longissimus dorsi is one of the finest meat cuts. Considering that human diets rich in poli-unsaturated fatty acids (PUFA) can decrease the risk of heart and other chronic diseases, a change in the fatty acid profile of this muscle could contribute to a healthier diet, aggregating value to the end-product of the lamb meat market. The effects of CNB-based diet on the gene expression of SCD and FASN support the notion that such diet, as previously shown for other sources of lipid in ruminants, can potentially change the fatty acid composition of L. dorsi, but this hypothesis needs to be experimentally verified by profiling fatty acids in animals fed CNB versus carbohydrate-based diets. CNB use as an ingredient in animal feeding is environmentally-friendly, since it contributes to by-product recycling from the agroindustrial plants in Northeast Brazil. Also, considering that CNB-based diet changes lipogenic gene expression without affecting weight gain or reproductive status of the rams, as shown in another work from our team, makes CNB a very important alternative food in ram production systems in tropical regions.
Sullivan, Rachael R. "Expression of follicle stimulating hormone receptor variants during the sheep estrous cycle". Thesis, Manhattan, Kan. : Kansas State University, 2009. http://hdl.handle.net/2097/1395.
Pełny tekst źródłaCaminal, Bobet Marta. "Tissue engineering for bone regeneration: in vitro development and in vivo testing in sheep". Doctoral thesis, Universitat Autònoma de Barcelona, 2014. http://hdl.handle.net/10803/285622.
Pełny tekst źródłaBone is a highly organized and specialized connective tissue, whose main function is the mechanics, providing attachment to muscles and therefore allowing the body to move. Currently the gold standard surgical treatment is based on the immobilization and introduction of bone grafts but it presents some complications, such as infections, non-unions, and donor site morbidity. Nowadays, millions of patients are suffering from bone defects and specifically, 10,000 to 20,000 new cases of osteonecrosis of femoral head (ONFH) are diagnosed only in the USA every year. Regenerative medicine (RM) and tissue engineering (TE) are two areas of science fields focused on the developing of therapies to replace and regenerate lost or damaged tissues to improve the quality of life the patient. The combination of biomaterials, cells and signals is the key tool for the development of a RM and TE product. One of the most developed fields in RM is the orthopedic regenerative medicine, in specifically for bone tissue. There are different strategies combining autologous cells with scaffolds that have shown some efficacy for treating bone injuries. After discovery phase of any new advanced therapy medicinal products, there is the development phase that includes the conduction of preclinical studies (made to perform the proof of concept, safety and toxicology) and clinical studies before the registration of the new product. First the components of the tissue engineered preparation (TEP) were determined and characterized in order to have a standardized material. It consists in MSC (mesenchymal stromal cells) both human and ovine sources are used as a cellular component seeded in a deantigenized and lyophilized bone particles as a scaffold. Then critical size bone defect (CSBD) was modeled in sheep in order to investigate the effect of the TEP in an extreme situation, demonstrating its safe ability to synthesize new bone and bone remodeling. Afterwards TEP was tested in a relevant translational animal model of bone disease based on the method reported by Velez and collaborators for modelling ONFH in sheep demonstrating its efficacy and safety. Also demonstrating that MSC were involved in the synthesis of new bone, because labeled bone progenitors are shown after ONFH treatment, although paracrine mechanisms can not be discarded. Therefore, the development of TEP could contribute to the overall RM to meet the requirements of an aging society.
Snow, Gregory L. "Strength of Arc Spot Welds Made in Single and Multiple Steel Sheets". Thesis, Virginia Tech, 2008. http://hdl.handle.net/10919/33200.
Pełny tekst źródłaMaster of Science
Constantinou, Marios, i Michael Gehde. "Manufacturing Hollow Bodies made of Continuous Glassfiber-reinforced Thermoplastics by Infrared Welding". Technische Universität Chemnitz, 2018. https://monarch.qucosa.de/id/qucosa%3A21287.
Pełny tekst źródłaPospěch, Ladislav. "Návrh změn informačního systému". Master's thesis, Vysoké učení technické v Brně. Fakulta podnikatelská, 2010. http://www.nusl.cz/ntk/nusl-222548.
Pełny tekst źródłaJohnson, Karen L. "The development of clues dealing with the contextual hints of the make-up of a document that will aid in the automatic application to a specific style sheet /". Online version of thesis, 1993. http://hdl.handle.net/1850/11733.
Pełny tekst źródłaKarlsson, Oscar, i Oskar Hjalmarsson. "Effektivare material-och produktionsstyrning för minskad genomloppstid i en process hos ett företag med funktionell layout : En fallstudie på Press Kogyo Sweden AB". Thesis, Linnéuniversitetet, Institutionen för ekonomistyrning och logistik (ELO), 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-104538.
Pełny tekst źródłaBackground: Today's markets have over time tended to become more global, which in turn has increased competition between companies. This has meant that many industry organizations have had to change in order to be competitive in the market. A concept that today permeates many companies is the lean practice, which is based on maximizing the use of resources, eliminating waste, and creating more efficient production. By working with lean, companies can achieve faster throughput time. For manufacturing industrial companies, a reduction in throughput time can generate various benefits. Some of these advantages are: reduced number of products in work, better quality, reduced costs, better forecasts, increased flexibility and reduced lead time towards customers.Press Kogyo has for a long period experienced problems with one of their processes. The main problem has been that they do not know what non-value-added activities/waste that can be found in the process and how these activitiesaffect the total throughput time of the process. Purpose: The purpose of the study is to map Press Kogyo's propeller process in order to be able to identify non-value-adding activities in the process. Furthermore, the study will provide Press Kogyo with proposals regarding how more efficient material and production control can reduce the throughput time in the propeller process. In order for the study to achieve theoretical relevance, another purpose of the study is to contribute with theories about how manufacturing companies, with a functional layout, can reduce the disadvantages of the layout with more efficient material and production control. Methodology: The study has been divided into three research questions. The first two research questions were specifically aimed at Press Kogyo, while the third research question was more generally directed at manufacturing companies with a functional layout. The study was conducted as a case study and was characterized by qualitative research methods. Empirical data has been collected through interviews, observations, and a focus group. For the first research question, process maps and VSM maps were created. This together with various interviews created the foundation for identifying non-value-adding activities/waste in the propeller process which affected the throughput time. For research question two, theory of material and production control was applied in order to reduce the non-value-adding activities/waste and consequently reduce throughput time in the process. Regarding research question three, interviews were conducted with Press Kogyo and another manufacturing company with a functional layout. The authors intended to, through these interviews, find answers to how manufacturing companies with a functional layout can reduce the disadvantages of the layout with the help of efficient material and production control. Conclusions: In the study, seven wastes were identified where “wait” was considered to be the waste that affected throughput time the most in the propeller process. To eliminate all waste and specifically the waste “wait”, methods and theories regarding material and production control was applied with a focus on production activity control (PAC). All the different theories that was used also created a theoretical model which can be a good basis for planning when companies with a functional layout want to find ways tostreamline their planning. Some parts of the theoretical model were also used later in the study where it was used to reduce the disadvantages that may exist with a functional layout
Gabrhelíková, Zdeňka. "Transformace IFRS do českých účetních standardů - některé problémy aplikované do podmínek vybrané fi". Master's thesis, Vysoké učení technické v Brně. Fakulta podnikatelská, 2007. http://www.nusl.cz/ntk/nusl-221397.
Pełny tekst źródłaMalebana, Ingrid Marumo Mokgadi. "Dietary effects of sclerocarya birrea caffra nut meal in growing-fattening male dorper sheep". Thesis, 2018. https://hdl.handle.net/10539/25285.
Pełny tekst źródłaIn Sub-Saharan Africa, the cost of producing livestock products is increasing due to the use of imported soyabean meal (SBM) as a dietary protein source in feeds. Reliance on the costly SBM can be reduced by developing alternative dietary protein sources for feeds. Seeds from indigenous trees are potential sources of nutrients including protein. In a series of experiments, the potential of Marula nut meal (MNM) to substitute SBM in lamb fattening diets was evaluated. Chapter 3 characterised and compared the nutrient and anti-nutrient composition of two MNMs (MNM1: produced using hydraulic filter press, MNM2: produced using cold press) and SBM. The MNMs’crude protein (CP) content, which ranged from 33% (MNM1) to 39% (MNM2), was lower than that of SBM (51%). The MNMs’ essential amino acid content ranged from 40 to 70% compared to that of SBM. The gross energy (GE), ether extract (EE) and total monounsaturated fatty acid (TMUFA) content of the MNMs were significantly higher (P<0.05) compared to that of SBM. The MNMs had a higher (P < 0.05) phosphorus and magnesium content than SBM. Compared to SBM, MNM2 had a higher oxalate and phytate-phosphate content, but a lower saponin and tannin content (P<0.05). MNM2 was used in the in vivo study (chapter 4) as a dietary protein source, due to it having a higher CP content and in vitro digestibility compared to MNM1. Chapter 4 interrogated the effects of MNM2: denoted as MNM, as a dietary protein source on growth performance, feed efficiency and health of Dorper lambs. Dietary MNM neither affected the growth, feed efficiency nor the liver and kidney function of the lambs. In chapter 5 the effect of dietary MNM2: denoted as MNM, due to its higher CP content than MNM1, was evaluated on meat quality. Substituting SBM with MNM at 0, 50 and 75% resulted in meat with high CP (P<0.05) but low EE content while substituting at 25 and 100% resulted in meat with high EE (P<0.05) but low CP content. Dietary MNM significantly increased the total saturated and TMUFA concentration in the meat. Complete substitution of SBM with MNM yielded fatty meat rich in oleic acid, manganese and selenium (P <0.05). The MNM can replace SBM in lamb fattening diets without compromising growth, feed efficiency, liver and kidney function and meat quality. However, substitution of SBM with MNM at high inclusion levels results in increased lipid content in the meat.
LG2018
Papachristoforou, Christakis. "Androgenic and oestrogenic effects on the endrocrinology of reproductive development in male and female sheep (Ovis aries L.) / by Christakis Papachristoforou". 1988. http://hdl.handle.net/2440/18634.
Pełny tekst źródła"April 1987."
Includes bibliograpical references (leaves 160-194).
xii, 194 leaves : ill. ; 30 cm.
Title page, contents and abstract only. The complete thesis in print form is available from the University Library.
Presents direct comparative information on growth and endocrinological aspects of reproductive development in intact and gonadectomized male and female Merino lambs born in autumn and treated prepubertally with either a non-aromatizable androgen (trenbolone acetate) with higher androgenic potency than testosterone, oestradiol -17beta(oestradiol), or a combination of these two steroid hormones.
Thesis (Ph.D.)--University of Adelaide, Dept. of Animal Sciences, 1988
Chou, Chin-Hui, i 周晉輝. "Study on the Manufacture Processes and Properties of Fuel Cell Bipolar-Plate Made of Aluminum/Carbon Fiber Corrugated Sheet". Thesis, 2014. http://ndltd.ncl.edu.tw/handle/48suqa.
Pełny tekst źródła國立虎尾科技大學
材料科學與綠色能源工程研究所
102
PEMFC is a perfluorosulfonic acid type solid polymer electrolyte, a platinum / carbon electrocatalyst, Purifying recombinant or hydrogen gas as fuel, air or pure oxygen as the oxidant. Graphite or a metal plate surface modified with a gas flow channel as a bipolar plate, bipolar plate with the function of the reactive gas transport, both sides are machined or uniform distribution of the reaction gas flow field channels, In order to ensure uniform distribution of the reaction gas in the electrodes. In this research, the carbon fiber prepreg material, carbon fiber woven with graphite powder, graphite, aluminum foil laminated together with a mixture, by hot-press molding process. The purpose of this paper is to study the extent of the carbon fiber woven fabric density, powder type and aluminum foil on the mechanical and electrical properties of the expanded graphite bipolar plates. From the results, the addition of expanded graphite, graphite powder significantly improved plane conductivity than the original composite board, For the mechanical properties had no significant effect. Join the 3K、 12K carbon fiber woven to produce the composite panels, because of the uneven surface to produce the effect on the electrical properties, and after adding aluminum foil for improved heat conduction effect, but will let conductivity deteriorates. Based on the above results, to add a different powder in carbon fiber prepreg, have a conductive path is formed between carbon fibers, for plane conductivity, penetration resistance with good enhance results. The results reveal that the fuel cell with carbon fiber prepreg * 6 + graphite(20%epoxy) has the great current density of 1054 mA/cm2 occurs at 0.28 V, and the highest power density of 295.68 mW/cm2 occurs at 0.48 V.
JIRMANNOVÁ, Kristýna. "Využití koz a ovcí při péči o krajinu a jejich zařazení v ekologickém zemědělství". Master's thesis, 2011. http://www.nusl.cz/ntk/nusl-50317.
Pełny tekst źródłaBOROVKOVÁ, Lucie. "Malé faremní provozy - mlékárny". Master's thesis, 2013. http://www.nusl.cz/ntk/nusl-153482.
Pełny tekst źródłaCuthbert, Nancy Marie. "George Tsutakawa's fountain sculptures of the 1960s: fluidity and balance in postwar public art". Thesis, 2012. http://hdl.handle.net/1828/4142.
Pełny tekst źródłaGraduate