Made available in DSpace on 2016-07-18T17:51:07Z (GMT). No. of bitstreams: 1 Dissertacao.pdf: 308272 bytes, checksum: 7df0ae05e2e184b04647e81dec8c55af (MD5) Previous issue date: 2010-08-10 / Expressive part of the peanut (Arachis hypogaea) in São Paulo State has cultivated for rotation in condemned areas of sugar cane that need to be reformed, and those areas frequently have presented low micronutrients levels and low basis saturation in soil. The objective of this work was to quantify the production and the yield components of the peanut crop fertilized with lime and gypsum applied in sowing combined with boron manure by leaf spray. The experiment was carried out from December 2007 to April 2008, on a dystroferric Hapludox, medium texture, in Guararapes, SP, Brazil. A randomized complete blocks design, with four replicates, and split plots, was used. The plots were composed by absence of Ca font (control), dolomite limestone with 0,5, 1 and 2 Mg ha-1 and gypsum with 0,5, 1 and 2 Mg ha-1, applied on sowing time of the peanut crop. The subplots were composed by levels boron with 0, 0,5, 1 and 2 kg ha-1 applied by leaf spray in initial flowering stage of the plants. The peanut crop presented expressive response to boron manuring, and the largest grains and pods productivities were obtain with 1 kg ha-1 of B. Fertilizations only Ca fonts applied in peanut sowing didn´t increase productivity and yield components. Combinations between Ca fonts applied in crop sowing and boron manuring by leaf spray favored the net yield of grains after peel off. / Grande parte do amendoim do Estado de São Paulo é cultivada em áreas de reforma de canavial, nas quais é comum o solo apresentar baixos teores de micronutrientes e de saturação por bases. O objetivo do trabalho foi avaliar a produtividade e rendimento do amendoim fertilizado com calcário e gesso na instalação da lavoura, combinados com adubação boratada foliar, em área de renovação de canavial. O experimento foi conduzido de dezembro de 2007 a abril de 2008 em um Latossolo vermelho distroférrico de textura média, em Guararapes-SP. O delineamento experimental foi em blocos completos e parcelas sub-divididas, em que nas parcelas foram a ausência de fonte de Ca na instalação da lavoura, 0,5, 1,0 e 2,0 t ha-1 de calcário dolomítico, e 0,5, 1,0 e 2,0 t ha-1 de gesso agrícola, e nas sub-parcelas 0, 0,5, 1 e 2 kg ha-1 de B foliar. O amendoim foi responsivo à adubação boratada, sendo as maiores produtividades de vagens e de grãos, assim como o máximo rendimento de grãos, alcançados com 1 kg ha-1 de B. A fertilização somente com fonte de Ca na semeadura do amendoim não incrementou a produção e rendimento de grãos. A combinação entre fontes de Ca na instalação da cultura e B foliar favorece o rendimento de grãos do amendoim após o descascamento.

Made available in DSpace on 2016-07-18T17:51:12Z (GMT). No. of bitstreams: 1 Wellington Eduardo Xavier Guerra.pdf: 517213 bytes, checksum: e4312a4c04b742d7d293d503e16d7494 (MD5) Previous issue date: 2013-12-13 / In the western region of São Paulo state the cultivation of brassica plants it is commonly indicated B application at planting, because of the lack of information about this element in its type of soil. The objective of this study was to observe the reaction of B dosages in the culture of canola (Brassica napus L. var. oleifera) in Red Sandy Latosol in the Western São Paulo state. The experimental design was a completely randomized type, under a factorial 2 x 4 with 4 replications (two cultivars and four dosages of B). It was evaluated two different cultivars: Hyola 401 and Hyola 76. The concentration of Boron (0,0, 0,5, 1,0 and 2,0 kg B ha-1), was calculated by using boric acid - PA reagent, applied directly to the soil. The biometric parameters analyzed involved: plant height, stem diameter, shoot dry mass, root dry mass, number of branches, production of seeds per plant, seeds moisture content, 1000 grain weight, germination, seed oil content and accumulation of nutrients. All of them were subjected to the analysis of variance by F test, and comparison of means by Tukey test at 5% significance, and polynomial regression analysis through statistical programs. The results indicated that the culture of canola responded doses of B in the parameters of grain weight plant-1, root dry mass and oil percentage to grow Hyola 76. The Hyola 401 had the highest percentage of germination with 0,5 kg B ha-1. But Hyola 76 showed higher germination percentage than Hyola 401. Ratings among the cultivars Hyola 76 had a better performance in all biometric parameters regarding Hyola 401. / Na região oeste do estado de São Paulo para plantas do grupo das brássicas é indicada aplicação de B no plantio, em virtude da carência de informações sobre aplicação de B no solo. O objetivo do trabalho foi avaliar a resposta da cultura da canola (Brassica napus L. var. oleifera) à doses de B em Latossolo Vermelho Arenoso na região oeste paulista. O delineamento experimental adotado foi o delineamento inteiramente casualizados, em esquema fatorial 2 x 4 com 4 repetições (dois cultivares e quatro doses de B), avaliando dois cultivares, Hyola 401 e a Hyola 76. As doses de Boro em forma de ácido bórico P.A foram de (0,0, 0,5, 1,0 e 2,0 kg B ha-1) aplicados no solo. Os parâmetros biométricos analisados foi a altura da planta, diâmetro do caule, massa seca da parte aérea, massa seca da raiz, número de ramificações, massa de sementes por plantas, massa de mil grãos, germinação, teor de óleo e acúmulo de nutrientes. Os dados foram submetidos à análise de variância pelo teste F, comparação das médias pelo de Tukey a 5% de probabilidade e também á análise de regressão polimonial por meio de programa estatístico. Os resultados indicaram que a cultura da canola respondeu as doses de B nos parâmetros de massa de grão planta-1, massa seca da raíz e na porcentagem de óleo para o cultivar Hyola 76. A Hyola 401 apresentou a maior porcentagem de germinação com 0,5 kg B ha-1. Mas a Hyola 76 apresentou maior porcentagem de germinação que a Hyola 401. Nas avaliações entre os cultivares a Hyola 76 teve um melhor desempenho em todos os parâmetros biométricos em relação à Hyola 401.

No presente trabalho, foi realizado um estudo sobre a influência da adição do boro em um aço C-Mn, nas transformações de fases por resfriamento contínuo, através da técnica dilatométrica. Para este estudo, utilizou-se dois aços de composição química semelhante: o aço 10B22 com 30 ppm de boro e o aço sem boro é o E1522, equivalente. Foram traçadas as curvas de CCT dos dois aços, onde analisou-se o efeito de temperabilidade do boro através das curvas de resfriamento. Os materiais foram ensaiados em um dilatômetro de resfriamento rápido, utilizando corpos de prova cilíndricos, resfriados por injeção de ar e hélio. Os resultados gráficos dos processos de resfriamento foram comparados com análises metalográficas ótica estruturais e quantitativas e também por medidas de dureza. Detalhes microestruturais, tais como, contagem de fases formadas em função das taxas de resfriamento, tamanho de grão, distribuição de inclusões e precipitados, foram extraídos, através de um sistema de análise de imagens. Complementando o trabalho, foi realizado uma completa documentação fotográfica das microestruturas, com uma indicação final do tratamento térmico mais adequado aos aços C-Mn microligados ao boro. / This work presents a study about the influence of boron on phase transformation by continuous cooling in a C-Mn steel using the dilatometric technique. For this study two close chemical composition steels were applied: a 10B2 steel with 30 ppm of boron and a E1522 steel without boron. For both steels the CCT curves were obtained, where the effect of boron on hardenability was analysed throughout continuous cooling curves. Both materials were testedcin a high speed quenching dilatometer, using cilindricals samples quenched by helium blow on their surfaces. The graphics results of cooling processes were compared with microstructural and quantitative optical metallographic analysis and hardness measurements. Microstructural features as such phases fraction as a function of cooling rates, grain size, and distributions of inclusions and precipitates were obtained through an image analysis system. In addition, complete microstructural photography documentation was carried out where it was possible to indicate the best heat treatment to boron microalloyed C-Mn steels.

Orientador: Salatiér Buzetti / Co-orientador: Marcelo Carvalho Minhoto Teixeira Filho / Banca: Mario Luiz Teixeira de Moraes / Banca: Paulo Henrique Muller da Silva / Resumo: Os solos de Cerrado apresentam baixo teor de boro no solo, sendo comum a suplementação deste elemento através da adubação via solo e foliar. Portanto, é importante definir qual o melhor modo de aplicação e fonte de B para o bom desenvolvimento e produtividade do eucalipto, com menor custo possível. Assim, objetivou-se, com este trabalho, comparar o efeito de fontes de B com alta e baixa solubilidade na cultura do eucalipto, bem como a aplicação foliar do micronutriente. O experimento foi conduzido na Fazenda Renascença, localizada no município de Três Lagoas/MS, com latitude 20o 34' S e longitude 51o 50' O e altitude de aproximadamente 305 m, no período de 02/2012 a 02/2014. O delineamento experimental foi o de blocos casualizados com seis tratamentos e cinco repetições, dispostos em um esquema fatorial de 3 x 2, sendo: 0 kg ha-1 de B, 1 kg ha-1 de B utilizando como fonte o ácido bórico (alta solubilidade, 17% B) ou 1 kg ha-1 de B utilizando como fonte o borogran (baixa solubilidade, 10% B), aplicados no sulco de plantio, com ou sem aplicações de ácido bórico via foliar na dose de 0,5% de ácido bórico na calda com volume de 250 L ha-1. Com a omissão de B via foliar houve incremento em altura de plantas nos tratamentos que receberam a aplicação do micronutriente no plantio, diferindo significativamente da testemunha. Porém, ambas as fontes, independente da solubilidade, apresentaram resultados semelhantes. As duas aplicações de B via foliar foram suficientes para que houvesse incremento em altura de plantas, quando comparadas aos tratamentos que não receberam aplicação de B no plantio. Aos 18 e 24 meses após o plantio foi constatado aumento no teor foliar de B nos tratamentos que receberam aplicação foliar. A aplicação de B no plantio, independente da fonte utilizada, assim como aplicação foliar do elemento, foram suficientes para reduzir os sintomas de deficiência de B. Com relação às fontes ... / Abstract: Cerrado soils present low levels of boron being common supplementation of this element through soil and foliar fertilization. Therefore, it is important to define how better mode of application and source for the successful development and productivity of eucalyptus, with possible cost savings. Thus, this study aimed to compare the effect of B sources with high and low solubility applied in soil and high solubility applied on leaf of Eucalyptus spp. The experiment was conducted at farm Renascença, located in Três Lagoas/MS with latitude 20 34 'S and longitude 51 50' W and altitude of approximately 305 m, in 02/2012 to 02/2014. It was used a randomized block design with six treatments and five replications arranged in a factorial scheme 2 x 3, being: 0 kg ha- 1 B, 1 kg ha- 1 B, using boric acid as source (high solubility, 17 % B) or 1 kg ha-1 B, using as source borogran (low solubility, 10 % B), applied at planting, with or without application of boric acid foliar at 0.5% in a volume of 250 Lha-1. With the omission of B foliar there was an increase in plant height in treatments with the application of boron at planting, differing from the control. However, both of these sources, regardless of the solubility, showed similar results. The two foliar applications of B were sufficient for getting an increase in plant height when compared to treatments without B application at planting. At 18 and 24 months after planting there was increased on B foliar content in treatments with foliar application. Applying B at planting, regardless of source, as well as foliar application, were sufficient to reduce the symptoms of B deficiency. Regarding the sources used at planting, dose of 1kg ha-1 B, showed similar results on plant height, DBH and volume of wood. However, borogran increased the conten of B in the soil after 24 months of planting, from 20 to 40 cm layer, which can be beneficial for crop over time / Mestre

Thesis advisor: James P. Morken / This dissertation details three main projects that focus on stereoselective synthesis of organoboron reagents and their application to total synthesis studies. The first chapter describes the development of an enantioselective palladium-catalyzed conjuntive cross-coupling of bis(alkenyl)borates to access chiral allylboron reagents. These reagents are of high synthetic value that is demonstrated through various applications. The second chapter describes the development of a diastereoselective amine-modified boron-Wittig reaction with ketone electrophiles to access trisubstituted alkenyl boronic esters. The synthetic utility of these trisubstituted alkenyl boronic esters is demonstrated through a novel palladium-catalyzed cross-coupling reaction. The third chapter encompassess studies toward the total synthesis of natural products amphidinolides C and F. It highlights the application of methods developed in the Morken laboratory in the context of challenging total synthesis. It also highlights the potential for newly developed conjunctive cross-coupling and boron-Wittig reactions to solve problems in total synthesis. / Thesis (PhD) — Boston College, 2020. / Submitted to: Boston College. Graduate School of Arts and Sciences. / Discipline: Chemistry.

Novel carborane (B10C2H12) and aromatic compounds (benzene, pyridine, diaminobenzene) copolymers and composite materials have been fabricated by electron beam induced cross-linking and plasma enhanced chemical vapor deposition (PECVD) respectively. Chemical and electronic structure of these materials were studied using X-ray and ultra-violet photoelectron spectroscopy (XPS and UPS). UPS suggest that the systematic tuning of electronic structure can be achieved by using different aromatic compounds as co-precursors during the deposition. Furthermore, top of valence band is composed of states from the aromatic moieties implying that states near bottom of the conduction band is derived from carborane moieties. Current- voltage (I-V) measurements on the ebeam derived B10C2HX: Diaminobenzene films suggest that these films exhibit enhanced electron hole separation life time. Enhanced electron hole separation and charge transport are critical parameters in designing better neutron voltaic devices. Recently, PECVD composite films of ortho-carborane and pyridine exhibited enhanced neutron detection efficiency even under zero bias compared to the pure ortho-carborane derived films. This enhancement is most likely due to longer electron-hole separation, better charge transport or a combination of both. The studies determining the main factors for the observed enhanced neutron detection are in progress by fabricating composite films of carborane with other aromatic precursors and by altering the plasma deposition conditions. This research will facilitate the development of highly sensitive and cost effective neutron detectors, and has potential applications in spintronics and photo-catalysis.

Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Nuclear Engineering; and, (M.S.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 1978. / Includes bibliographical references. / by Abolghaasem Fadaai. / Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Nuclear Engineering; and, (M.S.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 1978.

京都大学 / 0048 / 新制・課程博士 / 博士(農学) / 甲第21817号 / 農博第2330号 / 新制||農||1067(附属図書館) / 学位論文||H31||N5189(農学部図書室) / 京都大学大学院農学研究科応用生命科学専攻 / (主査)教授 間藤 徹, 教授 髙部 圭司, 教授 矢﨑 一史 / 学位規則第4条第1項該当 / Doctor of Agricultural Science / Kyoto University / DFAM

京都大学 / 0048 / 新制・課程博士 / 博士(工学) / 甲第22441号 / 工博第4702号 / 新制||工||1734(附属図書館) / 京都大学大学院工学研究科原子核工学専攻 / (主査)教授 神野 郁夫, 教授 斉藤 学, 准教授 櫻井 良憲 / 学位規則第4条第1項該当 / Doctor of Philosophy (Engineering) / Kyoto University / DFAM

京都大学 / 0048 / 新制・課程博士 / 博士(工学) / 甲第22891号 / 工博第4788号 / 新制||工||1749(附属図書館) / 京都大学大学院工学研究科高分子化学専攻 / (主査)教授 田中 一生, 教授 秋吉 一成, 教授 古賀 毅 / 学位規則第4条第1項該当 / Doctor of Philosophy (Engineering) / Kyoto University / DGAM