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Submitted by KAIO CÉSAR RAGGHIANTI null (kaioragghianti@hotmail.com) on 2016-01-13T17:02:52Z No. of bitstreams: 1 Dissertação final.pdf: 1290223 bytes, checksum: c3d7f8ada11adbfa971a4c172f7f9016 (MD5) / Approved for entry into archive by Ana Paula Grisoto (grisotoana@reitoria.unesp.br) on 2016-01-14T11:25:26Z (GMT) No. of bitstreams: 1 ragghianti_kc_me_jabo_int.pdf: 1290223 bytes, checksum: c3d7f8ada11adbfa971a4c172f7f9016 (MD5) / Made available in DSpace on 2016-01-14T11:25:26Z (GMT). No. of bitstreams: 1 ragghianti_kc_me_jabo_int.pdf: 1290223 bytes, checksum: c3d7f8ada11adbfa971a4c172f7f9016 (MD5) Previous issue date: 2015-12-18 / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) / Uma das alternativas para a redução da adubação mineral, sem o comprometimento da produção e produtividade da cana-de-açúcar é a utilização de adubos biológicos. O presente trabalho foi conduzido com o objetivo de determinar, em duas safras seguidas, a qualidade tecnológica, a produtividade agrícola e a rentabilidade da cana-de-açúcar, cultivada em solo que recebeu diferentes doses de fertilização minera,l associadas ou não a adubação biológica. As amostragens dos colmos de cana ocorreram na Fazenda de Ensino Pesquisa e Extensão da FCAV/UNESP- Jaboticabal, SP. As análises foram realizadas no Laboratório de Tecnologia do Açúcar e Etanol do departamento de Tecnologia da mesma universidade. A utilização do adubo biológico não influenciou a qualidade da cana-de-açúcar nas safras estudadas, independente do nível de fertilização mineral utilizado. A combinação de adubação biológica e doses menores de adubações minerais mostrou-se efetiva, com os tratamentos utilizando 75% da adubação mineral recomendada, safra 2013/2014, e o tratamento com 0%, na safra 2014/2015, na presença do adubo biológico, mostraram maiores produtividades de ATR e, consequentemente, maiores rentabilidades líquidas. / An alternative to the reduction of mineral fertilizer, without compromising sugarcane production and productivity is the use of organic fertilizers. This study was conducted in order to determine, in two consecutive crop seasons, the sugarcane technological quality, agricultural productivity and profitability, grown in soil that received different mining fertilization levels, associated with biological fertilization. Sampling of cane stalks occurred in Fazenda de Ensino, Pesquisa e Extensão of FCAV / UNESP Jaboticabal, SP. Analyses were performed in Laboratório de Tecnologia do Açúcar e Álcool of Technology department of the same university. The use of organic fertilizer did not influence the sugarcane quality in both crop seasons, regardless of the level of mineral fertilizers used. The combination of biological fertilizer and lower levels of mineral fertilizers proved to be effective, with treatments using 75% of the recommended mineral fertilization, during crop 2013/2014, and treatment with 0% in the, during 2014/2015 crop season, in the presence of biological fertilizer, showed higher productivity of ATR and consequently higher profitability.

Submitted by Eduarda Figueiredo (eduarda.ffigueiredo@ufpe.br) on 2015-03-11T13:01:47Z No. of bitstreams: 2 TESE_Marilda Nascimento Carvalho_BC.pdf: 2374659 bytes, checksum: 6206ceeb790a2faaa57e74fdae5877af (MD5) license_rdf: 1232 bytes, checksum: 66e71c371cc565284e70f40736c94386 (MD5) / Made available in DSpace on 2015-03-11T13:01:47Z (GMT). No. of bitstreams: 2 TESE_Marilda Nascimento Carvalho_BC.pdf: 2374659 bytes, checksum: 6206ceeb790a2faaa57e74fdae5877af (MD5) license_rdf: 1232 bytes, checksum: 66e71c371cc565284e70f40736c94386 (MD5) Previous issue date: 2011-02-17 / A contaminação da água por compostos orgânicos tóxicos é uma das maiores preocupações ambientais e tem aumentado o interesse na busca de adsorventes eficientes para a remoção desses compostos. A adsorção utilizando argilas constitui uma das tecnologias de aplicação crescentes empregadas no tratamento secundário de efluentes contaminados por compostos orgânicos de origem na indústria de petróleo. Este trabalho investigou um processo de adsorção dos compostos orgânicos benzeno, tolueno, etilbenzeno, xilenos (BTEX) e do fenol presentes em soluções aquosas em baixas concentrações, até 20 mg/L, por meio de uma argila esmectítica (chocolate) de origem do estado da Paraíba, no nordeste do Brasil, visando colaborar com tecnologias de caráter sustentável, para a indústria de petróleo e petroquímica. A argila organofílica foi sintetizada a partir do sal quaternário (SQA) cloreto de hexadeciltrimetilamônio na concentração de 150% da capacidade de troca catiônica (CTC) da argila, a qual promoveu o aumento do espaçamento basal da estrutura cristalina do argilomineral de 14,73 Å para 22,08 Å. Procedeu-se à avaliação de sistemas de adsorção multicomponente, em regime descontínuo, considerando as abordagens cinéticas e de equilíbrios. Os teores dos componentes BTEX e fenol foram quantificados por cromatografia líquida de alta eficiência (CLAE). Os resultados experimentais ajustaram-se bem ao modelo de equilíbrio combinado de Langmuir-Freundlich e revelaram capacidades máximas de adsorção entre 1,27mg/g (tolueno) a 8,28mg/g (fenol) e cinéticas de equilíbrio em torno de 30 minutos. Parâmetros relacionados à heterogeneidade superficial da argila indicaram a existência de sítios ativos específicos. As afinidades de adsorção de BTEX e de fenol pela argila organofílica no sistema multicomponente apresentaram-se na ordem decrescente: etilbenzeno > xilenos > tolueno > fenol > benzeno. Estas afinidades estiveram relacionadas ao tamanho das moléculas dos aromáticos. As eficiências de remoção obtidas variaram em torno de 55% e 90%.

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Platelet activating factor (PAF) is a unique signaling phospholipid that has many biologic properties in addition to platelet activation. PAF roles in reproduction involve ovulation, fertilization, embryo development, implantation and parturition. It may also serve as a biomarker for normal sperm function. The presence of PAF receptor on the spermatozoa of 10 stallions was investigated by immunofluorescence microscopy. Statistical analysis revealed that the fluorescence intensity, FI (Mean+/-SEM), in the post- acrosomal region (FI= 2.60+/-0.15) was significantly higher (P< 0.01) than that in any other region of stallion spermatozoa. The effect of synthetic PAF on stallion spermatozoal motility, capacitation, and the acrosome reaction (AR) were evaluated. Treatment of 10 stallion semen samples with 10 â 4 to 10 â 13 M PAF resulted in statistically significant differences in motility and capacitation (r2 = 0.81 and 0.83 respectively). The concentration of PAF, incubation time and their interaction were highly significant (P< 0.01) for their effect on motility. Concentrations of PAF ranging from 10-9 to10-11 M were able to induce capacitation. Following capacitation in vitro with PAF, and induction of the acrosomal reaction by progesterone, transmission electron microscopy (TEM) was conducted on the spermatozoa of 3 stallions, to detect the true AR. Differences in PAF concentrations were highly significant as indicated by R-square (for intact: 97.2, reacted: 89.8, and for vesiculated: 98.1). Treating spermatozoa from 3 stallions with the PAF antagonist FR-49175 inhibited calcium release and fluorescence intensity with a median inhibitory concentration (IC50) of 10-7.5 M (r2=0.82, P<0.01) and 10-8 M (r2=0.92, P<0.01) respectively, suggesting a receptor mediated process for the mechanism of action of PAF. Although the exact mechanisms of PAF action on equine spermatozoa remain unclear, it is widely reported that PAF acts by a receptor-mediated mechanism and that the PAF receptor is a member of the family of G-protein coupled receptors with phospholipase C as the effector. Since the limited success in equine ART (e.g. IVF) is in part due to lack of efficient treatment of stallion spermatozoa for capacitation, PAF may be useful to help capacitate stallion spermatozoa. Without proper capacitation, spermatozoa are unable to initiate the acrosome reaction which is a prerequisite for fertilization. / Ph. D.

Made available in DSpace on 2015-03-26T13:53:12Z (GMT). No. of bitstreams: 1 texto completo.pdf: 1395694 bytes, checksum: 1a9744fa54a5d1efc4ca3637cc61c5cf (MD5) Previous issue date: 2009-12-21 / Conselho Nacional de Desenvolvimento Científico e Tecnológico / The objective of this work was to evaluating the sorption and mobility of Ametryn in four types of soils [Red-Yellow Latosol (LVA), Humic Red-Yellow Latosol (LVAh), Red Latosol (LV) and Yellow Latasol (LA)], at different pH values. For such, samples of these soils were collected at the depth of 0-20 cm and characterized physically and chemically. Acid neutralization curves were generated for each soil. Shortly after, it was performed the correction of soil acidity (for LVA, LVAh and LV), at pH values close to 6,0. LA was evaluated only at pH 6,3. Before implanting the study on ametryn mobility, preliminary assays were carried out, one for each soil, aiming at determining the herbicide dose which inhibits by 50% the accumulation of dry matter by the aerial part of cucumber plants (Cucumis sativus), used as indicator species. Based on the data achieved, it was calculated the ametryn sorption ratio in the soils in relation to the inert substrate. The following sequence of sorption ratio in the soils was observed: LVAh sc > LVA sc > LVA cc > LVAh cc > LV sc > LA sc > LV cc (cc = with acidity correction; sc = without acidity correction). To evaluate ametryn mobility, PVC columns were used, with 10 cm of diameter and 50 cm of length. They were duly prepared and filled with the respective soils, and 4,0 kg ha-1 of ametryn were applied to the top of these columns. Twelve hours after herbicide application, a rain of 60 mm was simulated. After 72 hours, the columns were opened longitudinally andplaced in the horizontal position. The indicator species was sown along the columns for the assessment of ametryn mobility in the soils. The experiment was carried out in a completely randomized design, in split plot, with four replications. The experiment was composed of 70 treatments - seven substrates and ten segments (development of the indicator plants in the substrates of the columns at the depths of 0-5, 5-10, 10-15,15-20, 20-25, 25-30, 30-35, 35-40, 40-45 and 45-50 cm). Besides, a control without herbicide was used for each soil. It was concluded that the lowest ametryn mobilities occurred in soils with higher contents of clay and CTC, and that liming favored ametryn mobility in the soils investigated. / Objetivou-se com este trabalho avaliar a sorção e a mobilidade do ametryn em quatro tipos de solos [Latossolo Vermelho-Amarelo (LVA), Latossolo Vermelho- Amarelo Húmico (LVAh), Latossolo Vermelho (LV) e Latassolo Amarelo (LA)], com valores de pH natural e corrigido. Para isso, amostras destes solos foram coletadas à profundidade de 0-20 cm, caracterizadas física e quimicamente e, geradas curvas de neutralização de acidez para cada um dos solos. Logo após foi realizada a correção de acidez dos solos (LVA, LVAh e LV), a valores de pH próximos a 6,0. O LA foi avaliado apenas no valor de pH 6,3. Antes da implantação do estudo de mobilidade do ametryn foram realizados ensaios preliminares, um para cada solo, visando determinar a dose do herbicida que inibe em 50% o acúmulo de matéria seca pela parte área das plantas de pepino (Cucumis sativus), utilizadas como espécie indicadora. A partir dos dados obtidos foi calculada a razão de sorção do ametryn nos solos em relação ao substrato inerte. Constatou-se a seguinte sequência de razão de sorção nos solos:LVAh sc > LVA sc > LVA cc > LVAh cc > LV sc > LA sc > LV cc (cc = com correção da acidez; sc = sem correção da acidez). Para a avaliação da mobilidade do ametry nutilizou-se colunas de PVC de 10 cm de diâmetro por 50 cm de comprimento, devidamente preparadas e enchidas com os respectivos solos. No topo dessas colunas foi aplicado o ametryn, na dose de 4,0 kg ha-1 . Doze horas após a aplicação do herbicida fez-se a simulação de uma chuva de 60 mm. Após 72 horas as colunas foram abertas longitudinalmente, colocadas na posição horizontal, sendo semeadas ao longo delas a espécie indicadora para se avaliar a mobilidade do ametryn nos solos. O experimento foi realizado em delineamento inteiramente casualizado em esquema de parcelas subdivididas, com quatro repetições. O experimento foi composto por 70 tratamentos sendo sete tipos de solos e 10 segmentos (desenvolvimento das plantas indicadoras nos substratos das colunas nas profundidades de 0-5, 5-10, 10-15, 15-20, 20-25, 25-30, 30-35, 35-40, 40-45 e 45-50 cm). Em complementação, foi utilizada uma testemunha sem herbicida para cada solo. Concluiu-se que menores mobilidades do ametryn ocorreram em solos com maiores teores de argila e de CTC, e que a calagem favoreceu a mobilidade do ametryn nos solos estudados.

<p>This degree project has been carried out in cooperation with Enertech AB in Ljungby and is pilot study to automating all current manual soldering. The soldering process accounts for a large part of the processing cost in the production of a heat pump. The process is also a quality risk and has a major impact on the lifetime of the final product.</p><p>The Main task of this project has been to evaluate automation of the soldering process, to develop automation solutions and a principle layout, to draw the design changes required for the automation and to calculate the supposed solution.</p><p>This pilot study has resulted in a suggested automation solution using laser as a heat source for soldering. Calculations of the solution show that a automating a laser soldering cell is very profitable.</p>

This degree project has been carried out in cooperation with Enertech AB in Ljungby and is pilot study to automating all current manual soldering. The soldering process accounts for a large part of the processing cost in the production of a heat pump. The process is also a quality risk and has a major impact on the lifetime of the final product. The Main task of this project has been to evaluate automation of the soldering process, to develop automation solutions and a principle layout, to draw the design changes required for the automation and to calculate the supposed solution. This pilot study has resulted in a suggested automation solution using laser as a heat source for soldering. Calculations of the solution show that a automating a laser soldering cell is very profitable.

Thesis (Ph. D.)--University of Missouri--Kansas City, 1999. / Vita. Includes bibliographical references (leaves 171-178).