Utilização da ultrafiltração em fluxo tangencial como nova metodologia para determinação da capacidade de complexação e constantes de equilíbrio de íons 'Cu'(II) complexados por matéria orgânica natural

Pós-graduação em Química - IQ

Frações oxidáveis do carbono orgânico total e macrofauna edáfica em sistema de integração lavoura-pecuária

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Estudos de elementos repetitivos presentes no genoma da espécie Schizodon borelli (Characiformes: Anostomidae)

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Avaliação econômica do cultivo da soja em Rotação e sucessão de culturas: um estudo de Caso no município de Ourinhos-SP

Pós-graduação em Agronomia (Energia na Agricultura) - FCA

Atributos físicos e químicos de um argissolo sob diferentes Sistemas de Uso da Terra (SUTs)

Pós-graduação em Agronomia (Ciência do Solo) - FCAV

Análise econômica da produção de soja rr2 pro e soja rr1: estudo de caso no Estado de Mato Grosso

Pós-graduação em Agronomia (Energia na Agricultura) - FCA

Atributos microbiológicos do solo em sistemas de manejo de longa duração

Pós-graduação em Agronomia (Ciência do Solo) - FCAV

Estimativas de custo de produção e rentabilidade de plantas medicinais: carqueja cultivada em Cajuru, Estado de São Paulo

O objetivo deste trabalho foi calcular o custo de produção de carqueja cultivada no município de Cajuru (SP) e analisar seus indicadores de rentabilidade. O cultivo de quatro anos compreendeu no primeiro ano a fase de implantação e produção inicial (duas colheitas) e os três anos subsequentes somente produção (três colheitas/ano). Os custos mensurados foram o Custo Operacional Efetivo (COE) e Custo Operacional Total (COT), nos quais se constatou que o gasto com insumos foi o principal fator. Já os indicadores de rentabilidade analisados foram: receita bruta, lucro operacional, margem bruta, lucratividade e ponto de nivelamento. Verificou-se a existência de lucro operacional positivo ao longo do período. O presente estudo demonstrou a rentabilidade do cultivo de carqueja. Sugere-se a ampliação deste tipo de estudo para outras espécies medicinais para melhor compreensão deste importante tipo de cadeia produtiva.

Análise multivariada na diferenciaçãoentre manejos de solos cultivados com café

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Qualidade física e química do solo em função do sistema de produção e da aplicação superficial de silicato e calcário em experimento de longa duração

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Cellular Infiltrates and NF kappa B Subunit c-Rel Signaling in Kidney Allografts of Patients With Clinical Operational Tolerance

Background. Nuclear factor kappa B (NF kappa B) plays a potential role in tolerance by orchestrating onset and resolution of inflammation and regulatory T cell differentiation through subunit c-Rel. We characterized cellular infiltrates and expression of NF kappa B1, c-Rel and its upstream regulators phosphatidylinositol 3-kinase/RAC-alpha serine/threonine kinase, in allograft biopsies from patients with spontaneous clinical operational tolerance (COT). Methods. Paraffin-fixed kidney allograft biopsies from 40 patients with COT (n=4), interstitial rejection (IR; n=12), borderline changes (BC; n=12), and long-term allograft function without rejection (NR; n=12) were used in the study. Cellular infiltrates and immunohistochemical expression of key proteins of the NF kappa B pathway were evaluated in the cortical tubulointerstitium and in cellular infiltrates using digital image analysis software. Results were given as mean +/- SEM. Results. Biopsies from patients with COT exhibited a comparable amount of cellular infiltrate to IR, BC, and NR (COT, 191 +/- 81; IR, 291 +/- 62; BC, 178 +/- 45; and NR, 210 +/- 42 cells/mm(2)) but a significantly higher proportion of forkhead box P3-positive cells (COT, 11%+/- 1.7%; IR, 3.5%+/- 0.70%; BC, 3.4%+/- 0.57%; and NR, 3.7%+/- 0.78% of infiltrating cells; P=0.02). c-Rel expression in cellular infiltrates was significantly elevated in IR, BC, and NR when analyzing the number of positive cells per mm(2) (P=0.02) and positive cells per infiltrating cells (P=0.04). In contrast, tubular PI3K and c-Rel expression were significantly higher in IR and BC but not in NR compared with COT (P=0.03 and P=0.006, respectively). With RAC-alpha serine-threonine kinase, similar tendencies were observed (P=0.2). Conclusions. Allografts from COT patients show significant cellular infiltrates but a distinct expression of proteins involved in the NF kappa B pathway and a higher proportion of forkhead box P3-positive cells.

Präparation, Charakterisierung und elektronische Eigenschaften von dünnen Schichten des Hochtemperatursupraleiters HgReBa 2 Ca n-1 Cu n O y

Ziel dieser Arbeit war die Pr"{a}paration, Charakterisierung und Untersuchung der elektronischen Eigenschaften von d"{u}nnen Schichten des Hochtemperatursupraleiters HgReBa$_{2}$Ca$_{n-1}$Cu$_{n}$O$_{y}$, die mittels gepulster Laser-Deposition hergestellt wurden. Die HgRe1212-Filme zeigen in der AC-Suszeptibilit"{a}t einen scharfen "{U}bergang in die supraleitende Phase bei 124 K mit einer "{U}bergangsbreite von 2 K. Die resistiven "{U}berg"{a}nge der Proben wurden mit zunehmender St"{a}rke des externen Magnetfeldes breiter. Aus der Steigung der Arrheniusplots konnte die Aktivierungsenergie f"{u}r verschiedene Feldst"{a}rken bestimmt werden. Weiterhin wurde die Winkelabh"{a}ngigkeit des Depinning-Feldes $B_{dp}(theta)$ der Filme gemessen. Hieraus wurde ein Anisotropiewert von $gamma$ = 7.7 bei 105 K ermittelt. Dies ist relevant, um den f"{u}r Anwendungen wichtigen Bereich im $T$-$B$-$theta$-Phasenraum des Materials absch"{a}tzen zu k"{o}nnen. Die kritische Stromdichte $J_{c}$ der d"{u}nnen Filme aus HgRe-1212 wurde mit Hilfe eines SQUID-Magnetometers gemessen. Die entsprechenden $M$-$H$ Kurven bzw. das magnetische Moment dieser Filme wurde f"{u}r einen weiten Temperatur- und Feldbereich mit einem magnetischen Feld senkrecht zum Film aufgenommen. F"{u}r einen HgRe-1212-Film konnte bei 5 K eine kritische Stromdichte von 1.2 x 10$^{7}$ A/cm$^{2}$ und etwa 2 x 10$^{6}$ A/cm$^{2}$ bei 77 K ermittelt werden. Es wurde die Magnetfeld- und die Temperaturabh"{a}ngigkeit des Hall-Effekts im normalleitenden und im Mischzustand in Magnetfeldern senkrecht zur $ab$-Ebene bis zu 12 T gemessen. Oberhalb der kritischen Temperatur $T_{c}$ steigt der longitudinale spezifische Widerstand $rho_{xx}$ linear mit der Temperatur, w"{a}hrend der spezifische Hall-Widerstand $rho_{yx}$ sich umgekehrt proportional zur Temperatur "{a}ndert. In der N"{a}he von $T_{c}$ und in Feldern kleiner als 3 T wurde eine doppelte Vorzeichen"{a}nderung des spezifischen Hall-Widerstandes beobachtet. Der Hall-Winkel im Normalzustand, cot $theta_{H}= alpha T^{2} + beta$, folgt einer universellen $textit{T }^{2}$-Abh"{a}ngigkeit in allen magnetischen Feldern. In der N"{a}he des Nullwiderstand-Zustandes h"{a}ngt der spezifische Hall-Widerstand $rho_{yx}$ "{u}ber ein Potenzgesetz mit dem longitudinalen Widerstand $rho_{xx}$ zusammen. Das Skalenverhalten zwischen $rho_{yx}$ und $rho_{xx}$ weist eine starke Feld-Abh"{a}ngigkeit auf. Der Skalenexponent $beta$ in der Gleichung $rho_{yx}$ =A $rho_{xx}^{beta}$ steigt von 1.0 bis 1.7, w"{a}hrend das Feld von 1.0 bis 12 T zunimmt.

External drivers of biogeochemical cycles in a tropical montane forest in Ecuador

Successful conservation of tropical montane forest, one of the most threatened ecosystems on earth, requires detailed knowledge of its biogeochemistry. Of particular interest is the response of the biogeochemical element cycles to external influences such as element deposition or climate change. Therefore the overall objective of my study was to contribute to improved understanding of role and functioning of the Andean tropical montane forest. In detail, my objectives were to determine (1) the role of long-range transported aerosols and their transport mechanisms, and (2) the role of short-term extreme climatic events for the element budget of Andean tropical forest. In a whole-catchment approach including three 8-13 ha microcatchments under tropical montane forest on the east-exposed slope of the eastern cordillera in the south Ecuadorian Andes at 1850-2200 m above sea level I monitored at least in weekly resolution the concentrations and fluxes of Ca, Mg, Na, K, NO3-N, NH4-N, DON, P, S, TOC, Mn, and Al in bulk deposition, throughfall, litter leachate, soil solution at the 0.15 and 0.3 m depths, and runoff between May 1998 and April 2003. I also used meteorological data from my study area collected by cooperating researchers and the Brazilian meteorological service (INPE), as well as remote sensing products of the North American and European space agencies NASA and ESA. My results show that (1) there was a strong interannual variation in deposition of Ca [4.4-29 kg ha-1 a-1], Mg [1.6-12], and K [9.8-30]) between 1998 and 2003. High deposition changed the Ca and Mg budgets of the catchments from loss to retention, suggesting that the additionally available Ca and Mg was used by the ecosystem. Increased base metal deposition was related to dust outbursts of the Sahara and an Amazonian precipitation pattern with trans-regional dry spells allowing for dust transport to the Andes. The increased base metal deposition coincided with a strong La Niña event in 1999/2000. There were also significantly elevated H+, N, and Mn depositions during the annual biomass burning period in the Amazon basin. Elevated H+ deposition during the biomass burning period caused elevated base metal loss from the canopy and the organic horizon and deteriorated already low base metal supply of the vegetation. Nitrogen was only retained during biomass burning but not during non-fire conditions when deposition was much smaller. Therefore biomass burning-related aerosol emissions in Amazonia seem large enough to substantially increase element deposition at the western rim of Amazonia. Particularly the related increase of acid deposition impoverishes already base-metal scarce ecosystems. As biomass burning is most intense during El Niño situations, a shortened ENSO cycle because of global warming likely enhances the acid deposition at my study forest. (2) Storm events causing near-surface water flow through C- and nutrient-rich topsoil during rainstorms were the major export pathway for C, N, Al, and Mn (contributing >50% to the total export of these elements). Near-surface flow also accounted for one third of total base metal export. This demonstrates that storm-event related near-surface flow markedly affects the cycling of many nutrients in steep tropical montane forests. Changes in the rainfall regime possibly associated with global climate change will therefore also change element export from the study forest. Element budgets of Andean tropical montane rain forest proved to be markedly affected by long-range transport of Saharan dust, biomass burning-related aerosols, or strong rainfalls during storm events. Thus, increased acid and nutrient deposition and the global climate change probably drive the tropical montane forest to another state with unknown consequences for its functions and biological diversity.

Evaluating stress patterns for Plio-Quaternary brittle deformation along the Calama-Olacapato-El Toro fault zone, Central Andes

Understanding the geometry and kinematics of the major structures of an orogen is important to elucidate its style of deformation, as well as its tectonic evolution. We describe the temporal and spatial changes in the state of stress of the trans-orogen area of the Calama-Olacapato-El Toro (COT) Fault Zone in the Central Andes, at about 24°S within the northern portion of the Puna Plateau between the Argentina-Chile border. The importance of the COT derives principally from the Quaternary-Holocene activity recognized on some segments, which may shed new light on its possible control on Quaternary volcanism and on the seismic hazard evaluation of the area. Field geological surveys along with kinematic analysis and numerical inversion of ∼140 new fault-slip measurements have revealed that this portion of the COT zone, previously considered a continuous, long-lived lineament, in reality has been subjected to three different kinematic regimes: 1) a Miocene transpressional phase with the maximum principal stress (σ1) chiefly trending NNE-SSW; 2) an extensional phase that started by 9 Ma, with a horizontal NW-SE-striking minimum principal stress (σ3) – permutations between σ2 and σ3 axes have been recognized at two sites – and 3) a left-lateral strike-slip phase with a horizontal ∼E-W &sigma1 and ∼N-S σ3 dating to the Late Pliocene-Quaternary. Spatially, in the Quaternary, the left-lateral component decreases toward the westernmost tip of the COT, where it transitions to extension; this produced to a N-S horst and graben structure. Hence, even if transcurrence is still active in the eastern portion of the COT, as focal mechanisms of crustal earthquakes indicate, our study demonstrates that extension is becoming the predominant structural style of deformation, at least in the western region. These major temporal and spatial changes in the tectonic regimes are attributed in part to changes in the magnitude of the boundary forces due to subduction processes. The overall orogen-perpendicular extension might be the result of vertical stress larger than both the horizontal stresses induced by gravitational effect of a thickened crust.

Die Frühspezialisierung von Juniorennationalspielern im Fussball: Ein Vergleich zweier Generationen

Einleitung: Die Nachwuchsarbeit im Schweizer Fussball ist seit 1995 stark professionalisiert worden, was sich in den letzten 15 Jahren in mehrere internationale Erfolge niedergeschlagen hat. Im Hinblick auf den sportlichen Erfolg hat sich dabei gezeigt, dass sich die Karrieren der erfolgreichsten Schweizer Spieler, deren Förderung in die ersten Jahre dieser Professionalisierung fällt, bereits in der Sampling Phase (Coté, 1999) durch eine frühe Spezialisierung beschreiben lässt (Zibung & Conzelmann, 2013). Die Trainingsumfänge beinhalten v.a. Clubtraining und viel freies Spiel ausserhalb des Clubs oder fussballnahe andere sportliche Aktivitäten. In diesem Beitrag wird der Frage nachgegangen, inwiefern sich die in den folgenden Jahren nochmals akzentuierte Professionalisierung auf die sportlichen Karrieren der aktuellen Generation von talentierten Fussballspielern ausgewirkt hat. Methode: N = 32 Juniorennationalspieler mit mind. 1 Aufgebot in die U15 oder U16 Nationalmannschaft (Jg. 99; Stichprobe A) werden mit n = 151 ehemaligen Juniorennationalspielern (Jg. 81-87; Stichprobe B aus Zibung & Conzelmann, 2013) in Bezug auf relevante Indikatoren zur Frühspezialisierung verglichen. Dafür wurden die beiden Stichproben in Anlehnung an Zibung und Conzelmann (2013) mittels t-Tests (p < .05) bezüglich folgender Indikatoren für Frühspezialisierung verglichen: Alter beim Beginn freies Fussballspiel und beim ersten Clubeintritt, Trainingsstunden im Club, freies Fussballspiel sowie sportliche Aktivitäten neben dem Fussball (jeweils bis 12-jährig). Die Variablen wurden in beiden Studien retrospektiv per Fragebogen erfasst. Resultate: Die Spieler der jüngeren Generation haben bis 12 Jahre weniger Stunden frei Fussball gespielt (MA = 2016.6, SDA = 1107.1) als die Spieler der älteren Generation (MB = 2535.5, SDB = 1277.3) (t(50.1) = 2.34, p = .02, d = .66). Gleichzeitig haben sie neben dem Fussball weniger andere sportliche Aktivitäten aufzuweisen (t(68.0) = 2.53, p = .01, d = .61). In den Variablen Trainingsstunden im Club (MA = 923.0, SDA = 166.6; MB = 967.0, SDB = 287.1), Alter beim Beginn des freien Fussballspiels (MA = 4.08, SDA = 1.5; MB = 4.36, SDB = 1.2) und beim ersten Clubeintritt (MA = 5.75, SDA = 1.0; MB = 6.07, SDB = 1.3) unterscheiden sich die beiden Stichproben nicht. Diskussion: Der Vergleich der beiden Stichproben zeigt, dass es in den letzten 15 Jahren zu einer Veränderung der Trainingsumfänge von Juniorennationalspielern gekommen ist. Die aktuelle Generation von Juniorennationalspielern spielt neben dem Clubtraining weniger frei Fussball und betreibt aber auch weniger andere Sportarten als die Juniorennationalspieler vor 10-15 Jahren. Ob vermehrte schulische Anforderungen diesen Rückgang in der generellen sportlichen Aktivität verschulden, müsste in der Folge weiter untersucht werden. Ebenso bleibt offen, ob die Einschätzung der Stichprobe B, aufgrund des relativ langen Zeitraums, der zwischen der Erhebung und dem zu erfassenden Zeitraum liegt, zu einer Antwortverzerrung und damit einer Erhöhung der geschätzten Trainingsstunden geführt hat. Literatur: Côté, J. (1999). The influence of the family in the development of talent in sport. The Sport Psychologist, 13 (4), 395–417. Zibung, M. & Conzelmann, A. (2013). The role of specialisation in the promotion of young football talents: A person-oriented study. European Journal of Sport Science, 13 (5), 452–460.