Дисертації з теми "Available P"
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Colchesqui, Luciane Martins de Barros. "Síntese, caracterização e dopagem do poli(sulfeto de p-fenileno)." Universidade de São Paulo, 1991. http://www.teses.usp.br/teses/disponiveis/54/54132/tde-19022015-104504/.
Повний текст джерелаPoly-p-phenylene sulfide in the form of powder, was prepared by the reaction of p-dichlorobenzene with sodium sulfide in N-methylpyrrolidone in a specially builted stainless steel system. The samples has been obtained by the melting of PPs on glass sheets in temperature of about 300°C and rapidly quenched resulting in amorphous samples. The structural characterization of the samples were investigated using infrared technique, x-ray diffraction and differential scanning calorimetry (melting point), the results were compared with Rydon (trade name of the PPS). The electrical conductivity of undoped amorphous films obtained from the synthesized sample of PPS, as well as doped in solution (AlCl3/ nitromethane). The decrease of electrical conductivity of the amorphous doped films as a function of time of exposition to air was also analyzed
Teixeira, Rodrigo Fantinatti. "Interpretação do P-CMM como facilitador da melhoria de processo de software." Universidade de São Paulo, 2000. http://www.teses.usp.br/teses/disponiveis/55/55134/tde-01032018-104559/.
Повний текст джерелаDifficulties and problems found largely in the improvement of process of software come from the barriers placed by the people involved in the process. In this work P-CMM (People Capability Maturity Model) it is interpreted with the intention of minimizing those barriers. They are also presented as two key process areas of P-CMM, considered as the most ánportant to facilitate the improvement of software process, Communication and Mentoring, they can be implanted in companies of small and medium load.
Soares, Juliana Coatrini. "Eletrossíntese e caracterização voltamétrica e espectroscópica de filmes de poli-p-fenileno e derivados." Universidade de São Paulo, 2006. http://www.teses.usp.br/teses/disponiveis/88/88131/tde-21082015-092846/.
Повний текст джерелаThis work describes the e1ectrochemical synthesis, structural and electrochemical characterization, and the optical properties of poly(p−phenylene) (PPP), poly(3−methylthiophene) (P3MET), polypyrrole (PPI) and their derivatives poly(p−phenylene−3−methylthiophene) (CP3MET) and poly(p−phenylene−pyrrole) (CPPI) films. Our motivation cab be justified by the fact that poly(p−phenylene) (PPP) and its derivatives are conjugated polymers that emit in the blue range of energy, and they appoint as potential candidates as active layers in displays (LEDs). The films were electrochemically synthesized on fluorine−tin−oxide glass (FTO) electrodes in a nonaqueous medium contend acetonitrile and TBAClO4. The electrochemical response of the PPP, P3MET, PPI, CP3MET and CPPI films were investigated by cyc1ic voltammetry in a monomer−free solution with the films showing a typical electroactive response. Their optical properties were investigated by in situ UV−VIS absorption spectroscopy, a technique widely used aiming at understanding the electronic structure of most polymers. The UV−VIS spectra of the PPP, P3MET, PPI, CP3MET and CPPI films were obtained at different p−doping states, i.e., at different applied potential allowing us to calculate the π− π∗ transition of the films at their neutral, and polaronic and bipolaronic states. The structural characterization of the films was investigated by FT−Raman and FTIR spectroscopy, where it was verified that the films prepared by the electrooxidation of co−monomers showed only the bands that were typical of those ones observed in the spectra of the homopolymers, P3MET and PPI.
HALL, THOMAS A. "ARCHAEAL RIBONUCLEASE P HAS MULTIPLE PROTEIN SUBUNITSHOMOLOGOUS TO EUKARYOTIC NUCLEAR RIBONUCLEASE P SUBUNITS." NCSU, 2001. http://www.lib.ncsu.edu/theses/available/etd-20010508-123921.
Повний текст джерелаRNase P removes the 5´ leader from all transfer RNA precursors, and is thus a required factor for protein synthesis. RNase P consists of a catalytic RNA molecule and associated protein, the amount of which varies among phylogenetic domains. The ca. 120 kDa RNA component of RNase P from Bacteria is catalytic
Previous characterizations of archaeal RNase P have presented conflicting and somewhat confusing results. RNase P from
Gantt, John Arthur. "Comparative Analysis of RNase P." NCSU, 2003. http://www.lib.ncsu.edu/theses/available/etd-09012003-153904/.
Повний текст джерелаOliveira, José Roberto Temponi de. "Uso do Amostrador de Gibbs e Metropolis-Hastings em Análise Bayesiana de Modelos AR(p)." Universidade de São Paulo, 1998. http://www.teses.usp.br/teses/disponiveis/55/55134/tde-15032018-141438/.
Повний текст джерелаIn this work we compare time series models, AR(p), using the Bayesian and classical approach. The classical approach uses the Alcaike Information Criterion (AIC) and the Bayesian Information Criterion (BIC) to choose the best fitted models for a time series record data. The estimation of the model parameters are obtained by maximinn likelihood estimation. In the Bayesian approach to time series the likelihood function is combined with the prior density of the parameters, via Bayes theorem, to produce the posterior distribution of the parameters and the predictive distribution of future observation. In this paper we use three clifferent prior density functions. First, the likelihood function is approximated by a normalgamma density over the parameter space, them combined with either a Jeffreys\' vague prior or a normal-gamma prior. The result is that the analysis is similar to that obtained by a multiple linear regression analysis. Thus, the posterior analysis is done with norrnal-gamma distribution. Thirdly the likelihood function is combined with prior t-Student distribution them the posterior and predictive analysis is made via Markov Chain Monte Cano. The results are applied to two simulated series and two stream flow series of Furnas and Itumbiara reservoirs.
Grossmann, Chris Allen. "Complete Spectroscopy of 30P." NCSU, 1999. http://www.lib.ncsu.edu/theses/available/etd-19991109-164413.
Повний текст джерелаGROSSMANN, CHRIS ALLEN.Complete Spectroscopy of P.(Under the direction of Dr. Gary E. Mitchell and Dr. John F. Shriner, Jr.)
Angular distribution measurements of the P reaction were used to assign quantum numbers of levels in P.This research was performed at the High Resolution Laboratory (HRL) at Triangle Universities Nuclear Laboratory (TUNL).Resonances were measured at five different angles using a High-Purity Germanium detector. The measured angular distributions were compared to calculated angular distribution expressions for different quantum number possibilities.The angular momentum quantum numbers J and parity pi were determined by the relative goodness of these fits.By comparing the reduced matrix elements to the empirically recommended upper limits on transition strengths, the isospin quantum number T was also determined for many states.Remaining ambiguities were removed by comparison of the experimental levels with theoretical shell model calculations and experimental Si levels.The work presented here improved the assignments for approximately 65 states.With a nearly pure and complete level scheme for P between the ground state and EP spectrum were examined.The fluctuations were consistent with a result intermediate between the GOE and Poisson distributions.Within one standard deviation, quantitative measurements of the statistical fluctuations were independent of isospin and consistent with previous Al results.
Marathe, Vikram. "A discrete equal-capacity p-Median problem." Thesis, This resource online, 1992. http://scholar.lib.vt.edu/theses/available/etd-12052009-020104/.
Повний текст джерелаMizoi, Marcia Fumi. "Métodos de Aproximação e Aplicação de MCMC na Estimação de Máxima Verossimilhança para Processos AR(p) e MA(q)." Universidade de São Paulo, 1998. http://www.teses.usp.br/teses/disponiveis/55/55134/tde-15032018-164925/.
Повний текст джерелаIn this work, the autoregressive and moving average time series models are considered. The main objective here is to use Markov Chain Monte Cano (MCMC) method (Metropolis-Hastings algorithm and the Gibbs Sampler) to calculate the maximum likelihood estimates in the ordinary sense (a point in the parameter space that maximizes the likelihood). The porpoused method was applied to the simulated and real date record. The estimates obtained by MCMC method was compared with likelihood estimate by iterative numerical methods.
Graulich, Jean-Sébastien. "Etude expérimentale des réactions (p,alpha) et (p,gamma) d'intérêt astrophysique en cinématique inverse. Application à la réaction 18F(p,alpha)15 O." Université catholique de Louvain, 2002. http://edoc.bib.ucl.ac.be:81/ETD-db/collection/available/BelnUcetd-11072002-131639/.
Повний текст джерелаAndrews, Andrew J. "Characterization of the Methanococcus jannaschii RNase P holoenzyme." NCSU, 2000. http://www.lib.ncsu.edu/theses/available/etd-20000810-110103.
Повний текст джерелаThe RNase P RNAs from Methanococcus and Archaeoglobus lack secondary structural features essential for the recognition of pre-tRNA. In the absence of protein, these RNase P RNAs lack catalytic activity. How the Methanococcus and Archaeoglobus RNase P holoenzymes compensate for the absent RNA structural elements is not known, but we hypothesize that it is via additional proteins. The Methanococcus jannaschii RNase P holoenzyme has been purified for structural and functional characterization. This enzyme has a buoyant density in Cs2SO4 of 1.39 g/ml and an apparent molecular weight of greater than 400kDa. The holoenzyme has a Km of 68 nM, a kcat of 37nM min-1 (similar to that of other RNase P enzymes) and tolerates a wide range of ionic conditions. Six potential protein subunits have been identified on the basis of copurification with enzymatic activity. The molecular weight of three of these bands is consistent with apparent holomologs of RNase P proteins from Methanobacterium thermoautotrophicum and Saccharomyces cerevisiae.
WILLIAMS, DANIEL. "ANALYSIS OF RNase P RNA STRUCTURE AND FUNCTION." NCSU, 2001. http://www.lib.ncsu.edu/theses/available/etd-20010821-140212.
Повний текст джерелаABSTRACTWILLIAMS, DANIEL. Analysis of RNase P Structure and Function. (Under the direction of James W. Brown.) The diversity of Archaea in municipal wastewater sludge was investigated by amplification of rRNA sequences from sludge DNA using archaeal-specific primers. The most common sequences were extreme halophiles; also found were sequence members of environmental euryarchaeal and crenarchaeal groups. Only distant relatives of Methanosarcina among the Methanomicrobiales were found.A detailed comparative analysis of archaeal RNase P RNA structure and a comparison of the resulting structural information with that of the bacterial RNA reveals that the archaeal RNase P RNAs are strikingly similar to those of Bacteria. The differences between the secondary structure models of archaeal and bacterial RNase P have largely disappeared, and even variation in the sequence and structure in the RNAs are similar in extent and type. The structure of the cruciform (P7-P11) has been reevaluated on the basis of a total of 321 bacterial and archaeal sequences, leading to a model for the structure of this region of the RNA that includes an extension to P11 that consistently organizes the cruciform and adjacent highly-conserved sequences. Archaeal and bacterial RNase P RNAs are very similar in sequence and secondary structure, but in the absence of protein, the archaeal RNAs are much less active and require extreme ionic conditions. In order to assess how readily the activity of the archaea RNA alone could be improved by point mutations in its sequence, in vitro selection was used to generate variants of the self-cleaving conjugant Methanobacterium formicicum: B. subtilus tRNAAsp (cpTP). Functional variants were generated with a broad spectrum of mutations that were predominately consistent with natural variation in this RNA. Variants generated from the selection were only comparable to wildtype in catalytic activity; more performed significantly faster at lower ionic strength. These results suggest that the archaeal RNase P RNA is globally optimized and that the protein may play larger compensatory roles in catalysis than previously thought.
Nixon, Joseph Blair. "Verification of the Weathered Rock Model for P-y Curves." NCSU, 2002. http://www.lib.ncsu.edu/theses/available/etd-11132002-203833/.
Повний текст джерелаBates, Ginger. "Characterization of the protein component of Methanococcus jannaschii RNase P." NCSU, 2001. http://www.lib.ncsu.edu/theses/available/etd-20010905-163839.
Повний текст джерелаRNase P is the ribonuclease responsible for the 5? maturation of precursor transfer RNA (pre-tRNA). In Bacteria RNase P is composed of a single 14kDa protein accompanied by a single catalytic RNA subunit that is capable of cleave pre-tRNA without the protein cofactor in vitro. The RNA subunit of archaeal RNase P resembles those found in Bacteria, however holoenzymes characterized from the Archaea indicate that the accompanying protein component is much larger than in the bacterial enzyme. Purified RNase P from the Euryarchaeon Methanococcus jannaschii possesses approximately eight protein subunits and has an RNA that is incapable of cleaving pre-tRNA alone in vitro. Four putative M. jannaschii RNase P proteins have been identified by their similarity to RNase P proteins of Methanothermobacter thermoautotrophicus. Here we confirm the presence of two of these proteins, MJ0464 and MJ1139, as well as the presence of several other hypothetical proteins (MJ0332.1, MJ0376, MJ1128, and MJ1625), two 30S ribosomal protein subunits (S6E and S8E), and a nicotinamide-nucleotide adenylyltransferase in M. jannaschii RNase P preparations. Eukaryotic RNase P holoenzymes also contain multiple protein subunits and it is thought that these "extra" proteins are required for function in the increased compartmentalization of the eukaryotic cell. Archaeal cells do not have the distinct compartmentalization seen in eukaryotic cells and it is unclear what purpose the protein subunits described here would have in vivo. One possibility is protein-substrate interactions to facilitate formation of the substrate-enzyme complex. M. jannaschii RNase P RNA lacks certain secondary structures present in E. coli RNase P RNA that have been shown in the bacterial model to interact with pre-tRNA substrate. Archaeal RNase P RNAs that possess these elements, such as that of M. thermoautotrophicus, are capable of cleaving substrate in vitro without protein, although only at very high salt concentration. M. jannaschii RNase P RNA does not have any extra secondary structural elements to compensate for the lack of substrate binding helices and it is possible that the protein component has evolved to assume these responsibilities. In order to test this hypothesis, circularly permuted transfer RNAs containing a photoagent positioned in the T loop were used in ultra-violet cross-linking reactions.
Clark, Shane Cecil. "Development of P-y curves for a Well Graded Gravel." NCSU, 2001. http://www.lib.ncsu.edu/theses/available/etd-20011203-234040.
Повний текст джерелаResearch work is conducted to investigate the possibility of using laboratory model tests to simulate lateral response of drilled shafts embedded in soft weathered rock and discern their P-y curve function. Eight lateral load tests on instrumented model piles embedded in an Aggregate Base Course (ABC) medium are performed to evaluate the P-y curves. The ABC material is selected to simulate the response of soft weathered rock encountered in the field. The laboratory-evaluated P-y curves are compared to data from full-scale field tests performed in weathered rock. The two key parameters evaluated are the modulus of subgrade reaction (kho) and the ultimate lateral resistance (Pult). Using the laboratory-measured data, in comparison to measured field behavior, correlations for the subgrade modulus as a function of depth, as well as simplified approximations of Pult are developed for weathered rock materials. Results indicated that a hyperpolic P-y function seems to best represent the measured laboratory P-y curves. A comparison between laboratory and field data indicated that the ABC testing medium appears to yield kho and Pult that behave in a fashion similar to weathered rock material. Accordingly, it seems that, when appropriately mixed, that ABC can be used to model SWR encountered in the field. A distribution of kho with applied confining stress is evaluated and compared to results from procedures proposed by Reese (1997) for weathered rock and Terzaghi (1955) for stiff clay. A relationship developed for the distribution of subgrade modulus as a function of depth compared well with field data. The relationship of Pult with depth as a function of Geological Strength Index (GSI) and friction angle is also presented. All results are viewed in the context of the field measured response.
Leuenberger, Georg H. W. "Electrostatic density measurements in green-state P/M parts." Link to electronic thesis, 2003. http://www.wpi.edu/Pubs/ETD/Available/etd-0429103-125812/.
Повний текст джерелаKeywords: green-state P/M parts; inverse algorithm; conductivity-density relationship; nondestructive testing. Includes bibliographical references (p. 142-148).
Malmonge, José Antonio. "Preparação, caracterização e estudo do mecanismo de transporte de cargas em blendas do copolímero P(VDF-TrFE) com poli(o-metoxianilina)." Universidade de São Paulo, 1997. http://www.teses.usp.br/teses/disponiveis/76/76132/tde-13022015-164740/.
Повний текст джерелаIn this work we have obtained flexible conductive blends of P(VDF-TrFE) (60-40) copolymer and POMA. Free-standing films were studied by conductivity measurements, thermal gravimetric analysis, differential scanning calorimetry, scanning electron microscopy and X-ray diffraction. The electrical conductivity reached was 10-3S/cm for contents of about 25% of POMA doped with TSA. The blends are thermally stable up to 230°C and showed fibrils morphology that increase in quantity with the increase of content POMA-TSA. The crystalline structure and the phase transition (ferroelectric to paraeletric), of copolymer was also observed in the blends even to high content of POMA (20%). The temperature dependence of σ dc showed that at low temperature the conduction process is governed by Variable Range Hopping (VRH) in three dimensions. The ac conductive measurement, at low temperature, showed a dependence with frequency as σac≈ωs, where the exponent s depend of temperature, converging to one as the temperature goes to zero. Also thin films of chemically synthesized PANI and POMA, were exposed to ionizing X-ray radiation and characterized by ultraviolet visible spectroscopy, electron paramagnetic resonance, electrical conductivity and solubility measurements. Samples irradiated in vacuum or dry oxygen atmosphere did not show electronic spectra variation. However, under humid atmosphere the energy of the excitonic transition was decreased and accompanied by a great conductivity increase. The results indicate that doping of polyaniline can be induced by X-ray radiation. The solubility is significantly decreased to irradiated samples, even after to be doped, due to crosslinking. In samples previously doped with inorganic acid, the conductivity decreased with irradiation dose, probably due to structural changes.
Choi, Kwangbom. "P-Coffee a new divide-and-conquer method for multiple sequence alignment /." NCSU, 2005. http://www.lib.ncsu.edu/theses/available/etd-01182005-060947/.
Повний текст джерелаJackson, Laura Elizabeth. "The Directional p-Median Problem with Applications to Traffic Quantization and Multiprocessor Scheduling." NCSU, 2003. http://www.lib.ncsu.edu/theses/available/etd-11052003-111956/.
Повний текст джерелаMargalef, Pallarès Jèssica. "Screening of modular and readily available ligand libraries for C-X (X=H, C, N and O) bond forming reactions. The use of DFT studies for catalysts optimization." Doctoral thesis, Universitat Rovira i Virgili, 2016. http://hdl.handle.net/10803/386578.
Повний текст джерелаEl creciente interés para la obtención de compuestos enantioméricamente puros para la obtención de compuestos enantioméricamente puros, ha conducido a un importante desarrollo de la catálisis asimétrica. En este contexto, esta tesis se centra en la síntesis de varias familias de ligandos quirales altamente modulares a partir de compuestos de fácil disponibilidad. Concretamente, se ha trabajado en la síntesis de ligandos fosfito-tioéter, fosfito-piridina, fosfito-triazoles y ligandos hidroaximida y tioamida. Todos ellos tienen en común que son sólidos, estables y por lo tanto de fácil manipulación. Estos ligandos se han aplicado en la hidrogenación de olefinas funcionalizadas y no funcionalizadas catalizada por Rh e Ir, en la reducción de cetonas mediante transferencia de hidrógeno catalizada por Rh y Ru, en reacciones de sustitución alílica catalizada por Pd y en el adición de organoaluminiatos a aldehídos catalizada por Ni. Además, en algunos casos se han realizado estudios DFT para agilizar el proceso de optimización de los ligandos. Así pues, se ha logrado la obtención de diferentes compuestos químicos quirales de alto interés sintético (ej. alcoholes, alcanos funcionalizados y no funcionalizados, alilos sustituidos) en grandes enantioselectividades y en el mejor de los casos se han conseguido los productos en su forma enantioméricamente pura (> 99% ee).
The growing interest in obtaining enantiomerically pure compounds in obtaining enantiomerically pure compounds has led to a significant development in the field of asymmetric catalysis. In this context, this thesis is focused on the synthesis of several families of highly modular chiral ligands from readily available compounds. Specifically, we worked on the synthesis of thioether-phosphite ligands, phosphite-pyridine, phosphite-triazole and hidroaximide and thioamide ligands. They all have in common that are solid, stable and therefore easy to handle. These ligands have been applied in the Rh- and Ir-catalyzed hydrogenation of functionalized and unfunctionalized olefins, in the Ru- and Rh-catalyzed asymmetric transfer hydrogenation of ketones, in Pd-catalyzed allylic substitution reactions and in the Ni-catalyzed addition of organoalumininum to aldehydes. Moreover, in some cases DFT studies have been performed to speed up the optimization of ligands. Hence, a variety of chiral chemical compounds of high synthetic interest (i. e. alcohols, functionalized and non-functionalized alkanes, substituted allyl) lhigh enantioselectivities were achieved and in some cases the products were obtained in their enantiomerically pure form(> 99% ee).
Gong, Xingyi. "A comparison of NMHC oxidation mechanisms using specified gas mixtures and trace-P field data." Diss., Available online, Georgia Institute of Technology, 2005, 2005. http://etd.gatech.edu/theses/available/etd-11142005-045424/.
Повний текст джерелаDavis, Douglas, Committee Chair ; Cunnold, Derek, Committee Member ; Mulholland, James, Committee Member ; Wang, Yuhang, Committee Member ; Wine, Paul, Committee Member. Vita. Includes bibliographical references.
Saha, Deepak. "De-lubrication during sintering of P/M compacts : operative mechanism and process control strategy." Link to electronic thesis, 2005. http://www.wpi.edu/Pubs/ETD/Available/etd-10014-233109.
Повний текст джерелаBelcher, Donald Dewayne. "Radical p-chains in L3(2)." [Johnson City, Tenn. : East Tennessee State University], 2001. http://etd-submit.etsu.edu/etd/theses/available/etd-0328101-161103/unrestricted/belcherd.pdf.
Повний текст джерелаFreitas, Irio Fernando de. "Fósforo extraído com resinas trocadoras de íons e Mehlich-1 de Latossolos, submetidos a fontes e doses de fósforo e tempos de contato." Universidade Federal de Viçosa, 2012. http://locus.ufv.br/handle/123456789/5491.
Повний текст джерелаAlthough numerous publications have tried to determine soil available P by different extraction methods, a number of questions remain unsolved. The objective of this study was to compare the Mehlich-1, Anion Resin, and Mixed Resin methods, to assess P availability in different soils, after application of soluble fertilizer and reactive and non-reactive phosphates, at different P rates and contact times. The laboratory experiment was conducted at room temperature (25 - 350C), at the Department of Soil Science of the Federal University of Viçosa, in randomized blocks in a [(3 × 3 × 2) +3]x 4 factorial design with four replications. Three Oxisols with different soil texture were tested: a very clayey LV,; a sandy clay loam LVA, and a sandy loam LA; with three P sources: triple superphosphate, Gafsa reactive phosphate rock, and natural phosphate from Araxá at two P rates (75 and 150 mg dm- 3), plus no treatment (0 dose) for each soil, after four phosphate - soil contact periods (15, 30, 60, and 120 days). Soil samples were collected from the 0 - 20 cm layer, sieved (2 mm), homogenized, and the physical and chemical properties analyzed. Soil acidity was corrected by raising base saturation to 60% with the application of CaCO3 and MgCO3 at a 4:1 molar ratio (LA required no correction). These samples were maintained at field moisture-capacity for 30 days. Thereafter, the soils were dried, crumbled and separated in 1-dm3 portions for the treatments. After the contact periods, the available-P concentrations in the samples were determined by the three extractors. Generally, the available P-content assessed by Mehlich-1, Mixed resin (MR), and anion resin (AR) decreased with increasing soil-P source contact time. For the three P sources, this reduction was most pronounced when using triple superphosphate, intermediate for reactive phosphate and phosphate Araxá was least sensitive to time effects. It was observed that AR extracted lower P levels from all three soils when the sources were phosphates, while MR extracted values close to Mehlich-1 in LV (clay) and LVA (medium texture) for reactive phosphate. For Araxá phosphate, much higher P values were determined by Mehlich-1 than by the resins, because of the acidity of the extractor. For triple superphosphate, both resins extracted higher P levels than Mehlich-1, due to the consumption of the extractor, especially from LV and LVA.
Apesar do grande número de publicações voltadas para a avaliação da disponibilidade de P por diferentes métodos de extração, persistem ainda muitas indagações sobre o assunto. O objetivo deste trabalho foi comparar os extratores Mehlich-1, Resina Aniônica e Resina Mista, quanto à avaliação da disponibilidade de P em diferentes solos, utilizando fertilizante solúvel e fosfatos naturais reativo e não reativo, em diferentes doses de P e tempos de contato. O experimento foi conduzido em condições de laboratório em temperatura ambiente (25 a 35 oC), nas dependências do Departamento de Solos da Universidade Federal de Viçosa, em blocos casualizados, no fatorial [(3 × 3 × 2) +3]x 4, com quatro repetições, sendo três Latossolos com diferentes constituições texturais: um LV, muito argiloso; um LVA, franco-argilo-arenoso e um LA, franco-arenoso; três fontes de P: superfosfato triplo, fosfato reativo de Gafsa; e fosfato natural de Araxá, em duas doses de P: 75 e 150 mg dm-3 , mais a dose 0 para cada solo; e em quatro tempos de contato fosfatosolo: 15, 30, 60 e 120 dias. As amostras dos solos foram coletadas na profundidade de 0 a 20 cm, passadas em peneira de 2 mm, homogeneizadas e submetidas à caracterização física e química. A acidez dos solos foi corrigida de acordo com o método da saturação por bases, elevando-a para 60 % com a aplicação de CaCO3 e MgCO3, na relação molar de 4:1, sendo que para o LA não houve necessidade de correção. Essas amostras foram mantidas por 30 dias com a umidade na capacidade de campo. Após esse período, os solos foram secos e destorroados e fracionados em porções de 1 dm3 para aplicação dos tratamentos. Foram coletadas amostras nos tempos de contato estabelecidos e determinadas as concentrações do P-disponível pelos três extratores. Verificou-se, de modo geral, redução no teor do P-disponível pelos extratores Mehlich-1, Resina Mista (RM) e Resina Aniônica (RA), com o aumento do tempo de contato das fontes de P com os solos. Considerando-se as três fontes de P, essas reduções dos teores foram mais pronunciadas quando se utilizou o superfosfato triplo, com o fosfato reativo em posição intermediária e o fosfato de Araxá o menos sensível ao efeito do tempo. Observou-se que a RA extraiu menores teores de P, nos três solos, quando as fontes foram os fosfatos naturais, ao passo que a RM aproxima-se dos valores obtidos pelo extrator Mehlich-1, no LV(argiloso) e LVA (textura média), para o fosfato reativo. Para o fosfato de Araxá, observaram-se valores de P bem mais elevados para o extrator Mehlich-1 do que para as Resinas, devido ao caráter ácido desse extrator. Para o superfosfato triplo, ambas as Resinas extraíram teores mais elevados de P do que o Mehlich-1, em decorrência do desgaste deste extrator, de modo particular no LV e LVA.
Rocha, Brenda Chung da. "Idade, duração e condições P-T do metamorfismo de temperatura ultra-alta, anatexia e cristalização de fundido na nappe Socorro-Guaxupé." Universidade de São Paulo, 2016. http://www.teses.usp.br/teses/disponiveis/44/44143/tde-28092016-143315/.
Повний текст джерелаThe Socorro-Guaxupé Nappe (SGN) consists of a deeply eroded Neoproterozoic magmatic arc, developed at the active margin of Paranapanema Plate. The SGN is located within the southern Brasília Orogen, that records the Ediacaran collision between the Paranapanema Plate and the São Francisco paleocontinent, related to the assembly of western Gondwana. The SGN exposes a thick section (ca. 10 km) of the lower crust, mainly composed of granulites and migmatites, and by widespread high-K calc-alkaline charnockite-granite intrusions that record the syn-collisional magmatism. The timing of partial melting, ultra-high temperature (UHT) metamorphism and melt crystallization in the SGN is constrained by an integrated study involving zircon and monazite in-situ dating techniques, detailed textural analysis, geothermobarometry, trace element geochemistry in accessory phases and main metamorphic minerals, whole-rock geochemistry and Sr-Nd isotopes in two key outcrops in the Alfenas region (MG): Alfenas Quarry (Metatexite Unit) and Santa Terezinha Quarry (Granulite Unit). Five monazite growth episodes are recognized in (orthopyroxene)-garnet-bearing migmatites within the Metatexite Unit. Monazite preserves prograde growth ages of ca. 631±4 Ma prior to the partial melting event, providing an upper age limit for the granulite-facies metamorphism in the SGN. Apatite-related monazite records the initial stages of decompression at ca. 628±4 Ma. Abundant zircon and monazite growth records a protracted melt crystallization event between ca. 630-600 Ma, with episodic growth in ca. 625 Ma, ca. 615 Ma e ca. 608 Ma at 790-680 °C, based on Ti-in-zircon thermometry. The development of Y+HREE-rich monazite rims documents the final stages of melt crystallization, concomitant to retrograde garnet breakdown and extensive biotite growth along the retrograde metamorphic path. Late recrystallization promoted by fluid infiltration is recorded by Th-rich monazite rims at ca. 590 Ma. Igneous crystallization ages from protoliths of the felsic and garnet granulites range from ca. 730-640 Ma, similarly to the age range of inherited xenocrystic zircon cores from leucosomes in both Metatexite and Granulite Units, and are interpreted to constrain the pre-collisional arc magmatism lasting for at least 90 m.y. The concordia ages of ca. 655-650 Ma obtained from the felsic and garnet granulites (Granulite Unit) reflect the main period of pre-collisional arc magmatism. Peak metamorphic conditions were attained at a ca. 1030 °C a 11.7 kbar, recorded by (orthopyroxene)-garnet-bearing leucosome within the Metatexite Unit, and at ca. 900 °C, 12 kbar recorded by garnet granulites within the Granulite Unit, which characterizes the syn-collisional UHT metamorphism in the SGN, here established in ca. 630-625 Ma. Basaltic magma underplating could be a potential heat source for UHT metamorphism, given the occurrence of syn-metamorphic mafic rocks in close spatial relation to in-situ hornblende- and orthopyroxene-bearing leucosomes within the Granulite Unit. Contrasting REE patterns in these leucosomes provide evidence for the presence of both fractionated melt (higher REE abundance and negative Eu anomaly) and cumulates (lower REE abundance and positive Eu anomaly). Studied samples from the Granulite Unit show isotopic evidence for enriched-mantle sources in their origin, as crustal recycling involving either Archean or Paleoproterozoic older crust have not been recognized yet.
Gaboriault, Edward M. "The effects of fill-nonuniformities on the densified states of cylindrical green P/M compacts." Link to electronic thesis, 2003. http://www.wpi.edu/Pubs/ETD/Available/etd-0528103-105536.
Повний текст джерелаKeywords: powder metallurgy; density distribution; compaction modeling; compact; powder; compaction. Includes bibliographical references (p. 141-142).
Hassani, Mary. "NAD(P)H:QUINONE OXIDOREDUCTASE (NQO1)-DIRECTED LAVENDAMYCIN ANTITUMOR AGENTS: STRUCTURE-BASED DESIGN, MOLECULAR MODELING AND STRUCTURE-ACTIVITY STUDIES." The University of Montana, 2007. http://etd.lib.umt.edu/theses/available/etd-09142007-140402/.
Повний текст джерелаBurch, Charmita P. "The extent of perturbation of skin models by transdermal penetration enhancers investigated by ³¹P NMR and fluorescence spectroscopy." unrestricted, 2007. http://etd.gsu.edu/theses/available/etd-04252007-133030/.
Повний текст джерелаTitle from thesis title screen. Author's name from thesis title screen. Jerry C. Smith, committee chair; Kathryn Grant, Stuart Allison, committee members. Electronic text (148 p. : ill. (some col.)) : digital PDF file. Description based on contents viewed October 5, 2007. Includes bibliographical references (p. 124-148).
Winslow, David M. "Fluid inclusions : evidence for a counterclockwise p-t trajectory in the Central Maine terrane of South-Central Massachusetts /." Thesis, This resource online, 1991. http://scholar.lib.vt.edu/theses/available/etd-02132009-172529/.
Повний текст джерелаJenkins, Kristen Buch. "Application of oxygen microbubbles for in situ biodegradation of p-xylene contaminated ground water in a soil column." Thesis, This resource online, 1992. http://scholar.lib.vt.edu/theses/available/etd-12042009-020039/.
Повний текст джерелаMicheli, Paola. "Assessment of available technologies for treatment of drilling cuttings considering economical and geographical conditions." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2017.
Знайти повний текст джерелаStanley, Lori Hillman. "Influence of Phytase and High Available Phosphorous Corn Diets on Solubility and Plant Uptake of P, Cu, and Zn in Poultry Manure and Manure-Amended Soils." Thesis, Virginia Tech, 2001. http://hdl.handle.net/10919/31109.
Повний текст джерелаMaster of Science
Lôbo, Lucas Morais. "Substância húmica e fontes de fósforo em latossolo vermelho e neossolo quartzarênico." Universidade Federal de Goiás, 2015. http://repositorio.bc.ufg.br/tede/handle/tede/6350.
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Processes of phosphorus adsorption in soil diminish the availability of this nutrient to plants. Humic and fulvic acids present in humic substances (SH) can block the phosphorus adsorption sites in the soil. Thus, this study aimed to verify the effect of adding doses of a SH, availability of P in two types of soils with different adsorption capacities. The treatments consist of four levels of SH (0, 100, 200 and 400 kg.ha-1), two phosphorus sources (Triple superphosphate – SFT and Natural Reactive phosphate – FNR), and three assessment time (7, 14 and 28 days) in two soil types (Red Latosol – LV and Quartzipsamment – NQ). The application of SH altered the availability of P in different soils. Statistical analysis of the data showed a significant difference (P<0,05) for all factors. In LV the P availability increased for both sources, with increasing SH dose up to 14 days. At 28 days the P-available decreases, with no significant difference between doses, but remains superior to treatment without addition of SH. In the NQ the P-available decreases from the addition of the doses of 200 and 400 kg ha-1 of SH up to 14 days of incubation. After 28 days with the degradation of SH values of P-available for these doses begin to increase. These results indicate that the use of SH is effective in increasing the availability of phosphorus in different soils.
Os processos de adsorção de fósforo (P) no solo diminuem a disponibilidade deste nutriente para as plantas. Os ácidos húmicos e fúlvicos presentes nas substâncias húmicas (SH) podem bloquear os sítios de adsorção de fósforo no solo. Desta forma, este estudo teve como objetivo verificar o efeito da adição de doses de SH, na disponibilidade de P em dois tipos de solos com diferentes capacidades de adsorção. Os tratamentos são constituídos de quatro doses de SH (0, 100, 200 e 400 kg ha-1), duas fontes de fósforo (Superfosfato triplo – SFT e Fosfato Natural Reativo – FNR), e três épocas de avaliações (7, 14 e 28 dias), em dois tipos de solos (Latossolo Vermelho – LV e Neossolo Quartzarênico – NQ). A aplicação de SH alterou a disponibilidade de P nos diferentes solos. A análise estatística dos dados mostrou que houve diferença significativa (P<0,05) para todos os fatores. No LV a disponibilidade de P aumentou, para ambas as fontes, com o aumento da dose de SH até aos 14 dias. Aos 28 dias o P-disponível diminui, não havendo diferença significativa entre as doses, porém permanece superior ao tratamento sem adição de SH. No NQ o P-disponível diminui a partir da adição das doses de 200 e 400 kg ha-1 de SH até aos 14 dias de incubação. Aos 28 dias com a degradação da SH os valores de P-disponível para estas doses começam a aumentar. Estes resultados indicam que a utilização de SH é eficiente no aumento da disponibilidade de P em diferentes solos.
Stokely, Matthew Hughes. "Deployment, Testing and Analysis of Advanced Thermosyphon Target Systems for Production of Aqueous [18F]Fluoride via 18O(p,n)18F." NCSU, 2008. http://www.lib.ncsu.edu/theses/available/etd-03142008-132437/.
Повний текст джерелаSeeruttun, Sumantlall. "Weed management in sugar cares critical periods of weed competition and mechanisms of interference from Paspalum paniculatum and P. urvillei /." Pretoria : [s.n.], 2009. http://upetd.up.ac.za/thesis/available/etd-06102009-161410/.
Повний текст джерелаMiller, Kevin C. "Comparison of the aeroacoustics of two small-scale supersonic inlets." Thesis, This resource online, 1996. http://scholar.lib.vt.edu/theses/available/etd-11012008-063024/.
Повний текст джерелаGilstrap, Richard A. "Investigation of Ca₂₋x[subscript]rx[subscript]P₂O₇:Eu²⁺ for application to the plasma display panel." Available online, Georgia Institute of Technology, 2004:, 2003. http://etd.gatech.edu/theses/available/etd-04082004-180151/unrestricted/gilstrap%5Frichard%5Fa%5F200312%5Fms.pdf.
Повний текст джерелаIncludes bibliographical references (leaves 148-152).
Leftwich, Kevin Ned. "Habitat models for predicting the occurrence of blotchside logperch (Percina burtoni) and tangerine darters (P. aurantiaca) in the North Fork Holston River and Little River, Virginia." Thesis, This resource online, 1994. http://scholar.lib.vt.edu/theses/available/etd-06232009-063258/.
Повний текст джерелаTompkins, John Daniel. "Characterization of sympathetic ganglion sensitivity to substance P in a genetic and a non-genetic rat model of hypertension." [Johnson City, Tenn. : East Tennessee State University], 2002. http://etd-submit.etsu.edu/etd/theses/available/etd-1230102-021212/unrestricted/TompkinsJ022703f.pdf.
Повний текст джерелаDufauquez, Christophe. "Production de particules chargées légères et multiplicités neutroniques associées dans les réactions p+(nat)Si et alpha+(nat)Si de 20 à 65 MeV." Université catholique de Louvain, 2005. http://edoc.bib.ucl.ac.be:81/ETD-db/collection/available/BelnUcetd-06012006-114210/.
Повний текст джерелаMendorf, Christina. "Ortsaufgelöste Charakterisierung von Entmischungsphänomenen in GaxIn1-xAsyP1-y-Halbleiter-Heteroschichten im Raster-Transmissionselektronenmikroskop - Spatial resolved characterisation of decomposition in GaxIn1-xAsyP1-y-semiconductor hetero structures by scanning transmission electron microscopy." Gerhard-Mercator-Universitaet Duisburg, 2002. http://www.ub.uni-duisburg.de/ETD-db/theses/available/duett-05222002-093828/.
Повний текст джерелаBurnham, Shawn David. "Improved understanding and control of Mg-doped GaN by plasma assisted molecular beam epitaxy." Diss., Available online, Georgia Institute of Technology, 2007, 2007. http://etd.gatech.edu/theses/available/etd-06122007-133821/.
Повний текст джерелаDoolittle, W. Alan, Committee Chair ; Ferguson, Ian T., Committee Member ; Cressler, John D., Committee Member ; Dorsey, John F., Committee Member ; Carter, W. Brent, Committee Member.
Webb, Charlotte. "Science goes South : John Millington, Frederick Barnard, and the University of Mississippi, 1848-1861 /." Thesis, This resource online, 1993. http://scholar.lib.vt.edu/theses/available/etd-07212009-040329/.
Повний текст джерелаHart, Laura J. "Subacute immunotoxic effects of the environmental contaminants 7,12-dimethylbenzanthracene (DMBA), hexachlorocyclohexane (lindane), and 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) on spleen and pronephros cellularity and morphology and functional activity of macrophages contained in these hemotopoietic organs in the cichlid fish tilapia (Oreochromis niloticus)." Thesis, This resource online, 1996. http://scholar.lib.vt.edu/theses/available/etd-09182008-063320/.
Повний текст джерелаRojas, Asheebo. "KIR Channels in CO2 Central Chemoreception: Analysis with a Functional Genomics Approach." unrestricted, 2007. http://etd.gsu.edu/theses/available/etd-08032007-163450/.
Повний текст джерелаTitle from file title page. Chun Jiang, committee chair; Delon Barfuss, Deborah Baro, Teryl Frey, committee members. Electronic text (226 p. : ill. (some col.)) : digital, PDF file. Description based on contents viewed Nov. 1, 2007. Includes bibliographical references (p. 210-226).
Fujdiak, Radek. "Analýza a optimalizace datové komunikace pro telemetrické systémy v energetice." Doctoral thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2017. http://www.nusl.cz/ntk/nusl-358408.
Повний текст джерелаMcLean, Morgan Stuart Lance Kent. "A high resolution study of the ⁵²Cr(p,p₀) and ⁵²Cr(p,p₁) reactions." 2005. http://www.lib.ncsu.edu/theses/available/etd-04012005-054152/unrestricted/etd.pdf.
Повний текст джерелаLe, Thi Huong Xuan. "Nitrogen and phosphorus removal from wastewater added to sand by wheat straw addition and wheat plants." Thesis, 2019. http://hdl.handle.net/2440/124604.
Повний текст джерелаThesis (Ph.D.) -- University of Adelaide, School of Agriculture, Food and Wine, 2019
Jaikumar, Prashant. "Differential capacity p-cycles." 2008. http://www.lib.ncsu.edu/theses/available/etd-12062008-231533/unrestricted/etd.pdf.
Повний текст джерела"Etude expérimentale des réactions (p,alpha) et (p,gamma) d'intérêt astrophysique en cinématique inverse. Application à la réaction 18F(p,alpha)15 O." Université catholique de Louvain, 2002. http://edoc.bib.ucl.ac.be:81/ETD-db/collection/available/BelnUcetd-11072002-131639/.
Повний текст джерела