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Letteratura scientifica selezionata sul tema "Experiments"

Autore: Grafiati

Pubblicato: 4 giugno 2021

Ultima modifica: 9 giugno 2025

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Articoli di riviste sul tema "Experiments"

Dewald, Erlwine. "Trend zum Experiment / Trend toward Experiments." Applied Rheology 5, no. 1 (January 1, 1995): 36–38. http://dx.doi.org/10.2478/arh-1995-050110.

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ROMO, José. "Hacía Galileo Experimentos? (Did Galileo do experiments?)." THEORIA 20, no. 1 (January 6, 2005): 5–23. http://dx.doi.org/10.1387/theoria.575.

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Se pone en cuestión la interpretación propuesta por Peter Dear de la transformación sufrida por el recurso a la experiencia en la filosofía natural del siglo XVII, mediante una discusión de algunos aspectos de la construcción de la ciencia del movimiento de Galileo.

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Uy, O. Manuel, R. C. Benson, R. E. Erlandson, M. T. Boies, J. F. Lesho, G. E. Galica, B. D. Green, B. E. Wood, and D. F. Hall. "Contamination Experiments in the Midcourse Space Experiment." Journal of Spacecraft and Rockets 34, no. 2 (March 1997): 218–25. http://dx.doi.org/10.2514/2.3196.

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Witzel, John. "Experiments in probabilities and randomness [My favorite experiment." IEEE Instrumentation & Measurement Magazine 13, no. 3 (June 2010): 43–45. http://dx.doi.org/10.1109/mim.2010.5475168.

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BONIOLO, GIOVANNI. "Theory and Experiment. The Case of Eötvös' Experiments." British Journal for the Philosophy of Science 43, no. 4 (December 1, 1992): 459–86. http://dx.doi.org/10.1093/bjps/43.4.459.

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Kukacka, Leos, Ondrej Mach, Richard Schreiber, Michaela Chmelarova, Lucie Florianova, Martin Mazac, and Pascal Dupuis. "Brightness Matching Experiments With Pulsed Light: Experiment Design." IEEE Transactions on Industry Applications 57, no. 1 (January 2021): 1105–12. http://dx.doi.org/10.1109/tia.2020.3037282.

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Barton, Russell R. "Pre-Experiment Planning for Designed Experiments: Graphical Methods." Journal of Quality Technology 29, no. 3 (July 1997): 307–16. http://dx.doi.org/10.1080/00224065.1997.11979772.

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Thomas, Edward, and Michael Watson. "First experiments in the Dusty Plasma Experiment device." Physics of Plasmas 6, no. 10 (October 1999): 4111–17. http://dx.doi.org/10.1063/1.873672.

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Bisgaard, Søren, and Michael Sutherland. "Split Plot Experiments: Taguchi's Ina Tile Experiment Reanalyzed." Quality Engineering 16, no. 1 (January 9, 2003): 157–64. http://dx.doi.org/10.1081/qen-120020782.

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Vojtovich, I. D. "«Sensor» Experiment Application of thin-film sensors in space biological experiments." Kosmìčna nauka ì tehnologìâ 6, no. 4 (July 30, 2000): 117. http://dx.doi.org/10.15407/knit2000.04.128.

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Più fonti

Tesi sul tema "Experiments"

Cintra, Patricia. "Parâmetros nutricionais e hematológicos de ratos alimentados com soja (Glycine Max L.) geneticamente modificada." Universidade de São Paulo, 2005. http://www.teses.usp.br/teses/disponiveis/9/9131/tde-20122017-150702/.

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No presente trabalho foi estudado o efeito do consumo de soja geneticamente modificada e de sua parental em parâmetros nutricionais e hematológicos em ratos em crescimento. Farinha de soja, desengordurada e autoclavada, foi incorporada em rações experimentais: 12% de proteína para o 1° ensaio e 10% para 2° ensaio. As rações com soja foram suplementadas com aminoácidos essenciais (Ieucina, lisina, metionina e vali na) no 2° ensaio, devido a menor concentração desses aminoácidos nas rações do 1° ensaio quando comparadas ao grupo controle, perfil confirmado pelo aminograma. Ratos Wistar (n=64) foram alimentados, ad libitum, com rações controle (AIN-93G) e rações com a farinha de soja por 28 (1° ensaio) e 32 dias (2° ensaio). Para avaliação do aproveitamento biológico da proteína da dieta e da qualidade protéica, foram realizadas análises de nitrogênio na carcaça dos animais, nas fezes e na urina que foram coletadas ao longo de 2 períodos de balanço de 6 dias cada ensaio. Os parâmetros nutricionais avaliados foram : Coeficiente de eficácia alimentar (CEA), Coeficiente de eficácia protéica (PER), Coeficiente de eficiência líquida da proteína (NPR), Valor biológico da proteína (BV), Coeficiente de utilização líquida da proteína (NPU), digestibilidade protéica e o \"Escore químico corrigido pela digestibilidade real da proteína\". Para avaliação do estado nutricional foram avaliadas as concentrações de albumina, proteínas totais e IGF-1 no plasma. Como parâmetros hematológicos, foram avaliados o hemograma completo, mielograma e esplenograma. Os resultados obtidos demonstraram que animais alimentados com soja GM e sua parental apresentaram desenvolvimento semelhante ao grupo controle (caseína). Os valores de CEP e NPR encontrados nos 2 ensaios mostram que a proteína de soja é nutricionalmente adequada. A oferta protéica de 10% com suplementação com aminoácidos essenciais favoreceu no desenvolvimento dos animais, visto que foi observado aumento de peso em média de 50g, PER e NPR melhores quando comparados com a oferta protéica de 12% sem suplementação. Nos dois ensaios, os valores de digestibilidade dos grupos alimentados com soja foram inferiores aos do grupo controle, resultado evidenciado pela maior dificuldade das enzimas digestivas em digerirem a proteína vegetal, maior perda de aminoácidos endógenos e quantidade de fibra insolúvel presente na soja. O valor de POCAA de 85% demonstra bom aproveitamento dos grupos com soja. Não houve diferença estatística nos parâmetros plasmáticos estudados, bem como nos resultados hematológicos sugerindo que o consumo de soja, convencional ou GM, não altera o estado nutricional dos animais. In the present work, the effects of genetically modified (GM) soybean and its parental on nutritional and hematological parameters in growing rats were studied. Autoclaved, fat-free soybean flour was added to experimental diets: 12% protein in the first assay and 10% in the second assay. The soybean diets were supplemented with essential amino acids (Ieucine, Iysine, methionine and valine) in the second assay, since such amino acids presented a lower concentration in the diets of the first experiment, as confirmed by the aminogram. Wistar rats (n= 64) were fed a control diet (AIN-93G) and diets supplemented with soybean flour (parental and GM) ad libitum over 28 days (1st experiment) and 32 days (2nd experiment). For evaluating the biological utilization of dietary protein and protein quality, nitrogen analyses were carried out on the animal carcasses, feces and urine. Feces and urine were collected along two 6-day periods within each assay. The following nutritional parameters were evaluated: feed efficiency ratio (FER), protein efficiency ratio (PER), net protein ratio (NPR), biological value (BV), net protein utilization (NPU), protein digestibility and protein digestibility corrected by amino acid (POCM) score. For evaluating the nutritional status, plasma albumin, total proteins and IGF-1 were analysed. Complete hemogram, myelogram and splenogram were used as hematological parameters. The results indicate that animals fed the GM soybean and its parental showed a similar growth rate to the control group (casein). PER and NPR values found in both assays show that soybean protein is nutritionally adequate. A diet containing 10% protein supplemented with essential amino acids favored the growth of the animals in comparison to a diet containing 12% protein without amino acid supplementation. In both assays, the protein digestibility in soybean-fed groups was lower than in the control group, a result evidenced by a greater difficulty of enzymes in digesting vegetal proteins, a greater loss of endogenous amino acids and the presence of insoluble dietary fiber in the soybean. A POCM value of 85% showed a good protein utilization in the soybean-fed groups. No statistically significant differences were observed in the plasmatic and hematological parameters among the groups, suggesting that consumption of soybean (either GM or parental) does not alter the nutritional status of the animals.

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Haus, Andrea. "Classroom experiments ökonomische Experimente als Unterrichtsmethode." Schwalbach/Ts. Wochenschau-Verl, 2009. http://d-nb.info/995506701/04.

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Šikula, Pavel. "Analýza rizik ve vztahu k různým zaměřením ekonomických experimentů." Master's thesis, Vysoké učení technické v Brně. Ústav soudního inženýrství, 2014. http://www.nusl.cz/ntk/nusl-233065.

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The diploma thesis deals with analysis of risks in relation to various focus (or types) of economic experiments. On the basis of background research suggests entirely new classification of economic experiments and subsequently examines general structure of economic experiment. Performed analysis then identifies major risks of experimental economics, analyses them and proposes possible countermeasures. Outputs of the work substantially enrich and extend current theory. Their utilization is expected in theory and practice, for purpose of scientific research or specific objectives of companies and institutions.

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Sexton, Christine June. "Designing industrial experiments with restricted experimental resources." Thesis, University of Southampton, 1998. https://eprints.soton.ac.uk/50646/.

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This thesis presents two procedures for designing industrial experiments with restricted experimental resources. First, a two-stage approach is developed using the D- and Ds-optimality criteria in combination, to focus information into the effects of most relevance to the robust engineering design of a product. The method is demonstrated by finding a design for a study on gas sensors. The second approach forms the major contribution of this thesis. Semicontrolled experiments are developed for use in situations where the factor values cannot be pre-determined, although the way in which they are combined with other factors can be controlled. This situation arises when the costs of measuring components in a product, or of making one-off components, prevents the use of a conventional factorial experiment. In the method, samples of the components are obtained and features of interest are measured. The components are then combined in products for testing to give combinations of the factor values which will maximise the information on the factorial effects under investigation. This method is particularly useful when derived factors, that is, factors defined as functions of variables from one or more components, are of engineering interest. An exchange algorithm is presented for finding optimal designs for semi-controlled experiments and demonstrated on a small pilot study on a gear pump. An extension of the algorithm is provided to design experiments when some factors can be pre-set in the conventional way, but others cannot. The issues of power and the size of experiment for a semi-controlled study are also addressed through simulated experiments.

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Luiz, Rodrigo de Lima [UNESP]. "Experimentos de eletrostática como metodologia de aprendizagem significativa." Universidade Estadual Paulista (UNESP), 2018. http://hdl.handle.net/11449/158320.

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Submitted by Rodrigo De Lima Luiz (rodrigodelimaluiz@hotmail.com) on 2018-11-21T19:51:52Z No. of bitstreams: 1 DISSERTAÇÃO DEFINITIVA.pdf: 3442563 bytes, checksum: a1ec4acfa5218338bbc6cc71e90ad441 (MD5) Approved for entry into archive by Claudia Adriana Spindola null (claudia@fct.unesp.br) on 2018-11-22T10:50:34Z (GMT) No. of bitstreams: 1 luiz_rl_me_prud.pdf: 3385709 bytes, checksum: 3b7f3df96984f568b958099cfbebbdf2 (MD5) Made available in DSpace on 2018-11-22T10:50:34Z (GMT). No. of bitstreams: 1 luiz_rl_me_prud.pdf: 3385709 bytes, checksum: 3b7f3df96984f568b958099cfbebbdf2 (MD5) Previous issue date: 2018-10-01 Neste trabalho, foi pesquisada uma forma alternativa de aplicação de experimentos em sala de aula, na qual os alunos foram responsáveis pela confecção deles e não meros expectadores que observaram o professor realizar a atividade experimental. Assim, os estudantes produziram, executaram e tiraram suas conclusões acerca das atividades propostas. Propôs-se, neste trabalho, a aplicação de uma sequência didática para abordar eletrostática utilizando atividades experimentais, como metodologia de aprendizagem significativa, proposta por David Ausubel. Antes da realização dos experimentos, o tema foi contextualizado através de vídeos que mostravam situações intrigantes no cotidiano dos alunos, envolvendo eletrostática. Também foi abordada a história da eletricidade com suas principais descobertas e como os conceitos científicos foram evoluindo ao longo do tempo. Em seguida, utilizando materiais de baixo custo e fáceis de serem encontrados e seguindo roteiros experimentais, os alunos construíram experimentos que permitiram a verificação dos três processos de eletrização: atrito, contato e indução. Também, verificaram a distribuição de cargas em condutores em equilíbrio eletrostático, a blindagem eletrostática e o poder das pontas. O trabalho visou despertar o interesse e motivação dos alunos nas aulas de Física, desenvolvendo suas habilidades em seguir roteiros simples, coletar e analisar dados, além de aplicar os conceitos, abordados em sala, em situações de seu cotidiano. In this work, an alternative way of applying experiments in the classroom has been investigated, in which the students were responsible by their confections and not mere spectators who observed the teacher to perform an experimental activity. Thus, students produced, performed, and concluded on the proposed activities. It was proposed, in this work, the application of a Didactic Sequence to approach electrostatic using experimental activities, as significant learning methodology, proposed by David Ausubel. Before the experiments, the theme was contextualized through videos that showed intriguing situations in the daily life of students, involving electrostatics. It was also discussed the electricity history with its main discoveries, and how scientific concepts were developed over time. Then, using inexpensive, easy-to-find materials and following experimental script, the students constructed experiments that allowed the verification of the three electrification processes: friction, contact and induction. Also, they verified the charges distribution in conductors in electrostatic equilibrium, the electrostatic shield and the power of the tips. The aim of this work was to arouse student’s interest and motivation in physics classes, developing their skills in following simple scripts, collecting and analyzing data, and applying the concepts, addressed in the classroom, in everyday situations.

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Kang, Lulu. "Computer and physical experiments: design, modeling, and multivariate interpolation." Diss., Georgia Institute of Technology, 2010. http://hdl.handle.net/1853/34805.

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Many problems in science and engineering are solved through experimental investigations. Because experiments can be costly and time consuming, it is important to efficiently design the experiment so that maximum information about the problem can be obtained. It is also important to devise efficient statistical methods to analyze the experimental data so that none of the information is lost. This thesis makes contributions on several aspects in the field of design and analysis of experiments. It consists of two parts. The first part focuses on physical experiments, and the second part on computer experiments. The first part on physical experiments contains three works. The first work develops Bayesian experimental designs for robustness studies, which can be applied in industries for quality improvement. The existing methods rely on modifying effect hierarchy principle to give more importance to control-by-noise interactions, which can violate the true effect order of a system because the order should not depend on the objective of an experiment. The proposed Bayesian approach uses a prior distribution to capture the effect hierarchy property and then uses an optimal design criterion to satisfy the robustness objectives. The second work extends the above Bayesian approach to blocked experimental designs. The third work proposes a new modeling and design strategy for mixture-of-mixtures experiments and applies it in the optimization of Pringles potato crisps. The proposed model substantially reduces the number of parameters in the existing multiple-Scheffé model and thus, helps the engineers to design much smaller experiments. The second part on computer experiments introduces two new methods for analyzing the data. The first is an interpolation method called regression-based inverse distance weighting (RIDW) method, which is shown to overcome some of the computational and numerical problems associated with kriging, particularly in dealing with large data and/or high dimensional problems. In the second work, we introduce a general nonparametric regression method, called kernel sum regression. More importantly, we make an interesting discovery by showing that a particular form of this regression method becomes an interpolation method, which can be used to analyze computer experiments with deterministic outputs.

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Ferreira, Danilo Cardoso [UNESP]. "Elaboração de um material didático aplicado ao ensino de física para utilização do experimento virtual da dupla fenda." Universidade Estadual Paulista (UNESP), 2015. http://hdl.handle.net/11449/132892.

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Submitted by DANILO CARDOSO FERREIRA null (danilofunesp@hotmail.com) on 2016-01-15T16:37:27Z No. of bitstreams: 1 DaniloCardosoFerreiraDissertação.pdf: 18302953 bytes, checksum: 3c2360f40af22ce571ff0f502e07fce0 (MD5) Approved for entry into archive by Juliano Benedito Ferreira (julianoferreira@reitoria.unesp.br) on 2016-01-18T11:54:59Z (GMT) No. of bitstreams: 1 ferreira_dc_me_prud_par.pdf: 828636 bytes, checksum: 12854c3c461e55dc7897bb0c5127d4a8 (MD5) Made available in DSpace on 2016-01-18T11:54:59Z (GMT). No. of bitstreams: 1 ferreira_dc_me_prud_par.pdf: 828636 bytes, checksum: 12854c3c461e55dc7897bb0c5127d4a8 (MD5) Previous issue date: 2015-12-15 Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) A mecânica quântica é uma das áreas da Física que surgiu em meados de 1900 e permanece em desenvolvimento até os dias atuais. Diversos aparatos tecnológicos são consequência deste importante ramo da Física que também contribui com a Medicina, Matemática, Filosofia, Literatura e Biologia. Logo, é imprescindível que o contato com esta ciência ocorra no contexto do ensino médio. Para inserir o estudante no mundo da mecânica quântica, isto é, na física do infinitamente pequeno, o aluno deve abandonar o pensamento clássico e pensar em termos do comportamento quântico e do indeterminismo no processo de medida, isto é, desenvolver a capacidade de abstração. Sendo este, o objetivo deste trabalho. Para tanto, foi escolhido o experimento da dupla fenda que permite trabalhar com a dualidade onda-partícula do elétron e do fóton. Por meio deste experimento, o aluno pode ser inserido paulatinamente numa trajetória rumo a descrição quântica necessária para o exame dos fenômenos subatômicos. A análise experimental é cuidadosamente realizada com o auxílio de laboratórios virtuais, disponibilizados gratuitamente em sítios eletrônicos, os quais representam um recurso que permite realizar procedimentos experimentais que necessitariam de grande aparato laboratorial. O experimento da dupla fenda é analisado em três etapas, relatadas a seguir: (i) a dupla fenda com partículas clássicas; (ii) a dupla fenda com ondas clássicas e; (iii) a dupla fenda com objetos quânticos como elétrons e fótons. O objetivo é demonstrar o comportamento dual do elétron. Posteriormente, para concluir de forma precisa e justificar o comportamento quântico do elétron é apresentado o princípio da indeterminação de Heisenberg e suas implicações filosóficas. Sendo assim, o objetivo central desta pesquisa é buscar integrar o comportamento quântico, que acontece na escala atômica, principalmente no contexto do ensino médio. Algumas orientações sobre como aplicar este trabalho em outros níveis de ensino aparecem no decorrer do texto e nos apêndices. Apresentando o comportamento dual, onda–partícula, do elétron, a interpretação probabilística e o princípio de incerteza. Acreditamos que o aluno será capaz de compreender um grande número de fenômenos que acontece em escalas que não são do domínio da mecânica clássica quando, em contato com estes temas. Este tema faz parte do conteúdo de física moderna contemporânea que vem sendo abordado em livros textos e vestibulares. Além disso, algumas das novas tecnologias utilizam a física quântica, desde microscópios eletrônicos, nanotecnologia, computação quântica, semicondutores, diodos (incluindo o LED), transistores, computadores, tablets, GPS, satélites, radares, aviões, lasers, scanners de código de barras, sistemas militares de defesa, CD e Blu-Ray players, criptografia, células fotoelétricas, sensores diversos, basicamente, tudo que é eletrônico. Um dos objetivos do trabalho é verificar quais os conhecimentos prévios o corpo discente possui, antes do contato com o conteúdo de física quântica, ou seja, o que faz parte do senso comum sobre este tema. Além disso, pretendemos verificar se o aluno consegue: i) distinguir, no final da aplicação desta pesquisa, que as leis da física em escalas atômicas são diferentes das leis da física clássica, ii) a importância da mecânica quântica na tecnologia e na sociedade. Quantum mechanics is one of the areas of physics that emerged in mid-1900 and remains in development to the current day. Several technological devices are a result of this important branch of physics that also helps to Medicine, Mathematics, Philosophy, Literature and Biology. Therefore, it is essential that contact with this science occurs at the high school level, what actually occurs in a limited way, when it happens. To place the student in the world of quantum mechanics, that is, the infinitely small of physics, the student must leave the classical thought and think in terms of the quantum behavior and indeterminacy in the measurement process, namely to develop the capacity for abstraction. This is accurately the aim of this work. Thus, the double-slit experiment that lets you work with the wave-particle duality of the electron and the photon was chosen. Through this experiment, students can be gradually inserted on a path toward quantum description necessary for the examination of subatomic phenomena. The experimental analysis is carefully performed with the aid of virtual laboratories, available for free in electronic sites, which represent a resource to perform experimental procedures that would require large laboratory apparatus. The double slit experiment is analyzed in the following three steps, reported: (i) the slit paired with classical particles; (ii) the double slit and with classical waves; (iii) the double slit with quantum objects such as electrons and photons. The goal is to demonstrate the electron dual behavior. Later to complete accurately and justify the electron quantum behavior shows the principle of indeterminacy of Heisenberg and its philosophical implications. Thus, the main objective of this research is to seek to integrate quantum behavior, which takes place at the atomic scale, especially in the high school level. Some guidance on how to apply this work in other levels of education appear throughout the text and in the appendices. Introducing the dual behavior wave-particle, the electron, the probabilistic interpretation and the uncertainty principle. We believe that students will be able to understand a number of phenomena that occurs on scales that are not the classical mechanics of the domain when in contact with these topics. This topic is part of the contemporary modern physics content that is being addressed in texts and entrance exam books. In addition, some of the new technologies using quantum physics, from electronic microscopes, nanotechnology, quantum computing, semiconductors, diodes (including LED), transistors, computers, tablets, GPS, satellites, radar, aircraft, lasers, code scanners bars, military defense systems, CD and Blu-Ray players, encryption, photoelectric cells, various sensors, basically, everything is electronic. One of the goals of the work is to check what prior knowledge the student body has, before contact with quantum physics content, so the part of common sense on this issue. In addition, we intend to verify that the student is able to: i) distinguish, at the end of the application of this research, that the laws of physics at atomic scales are different from the laws of classical physics, ii) the importance of quantum mechanics in technology and society.

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Heidor, Renato. "Tributirina apresenta atividade quimiopreventiva quando administrada isoladamente, mas não em associação com a vitamina A, em ratos submetidos a modelo de carcinogênese de cólon." Universidade de São Paulo, 2007. http://www.teses.usp.br/teses/disponiveis/9/9132/tde-11072016-110536/.

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Avaliou-se a atividade quimiopreventiva da tributirina (TB), e da vitamina A (VA) administradas em associação ou não, antes, durante e após a iniciação em ratos submetidos a modelo de carcinogênese de cólon. Ratos Wistar receberam VA [1 mg/100 g de p.c (grupo VA)], tributirina [200 mg/100 g de p.c (grupo TB)] ou associação de VA com TB (grupo VA+TB). Ratos tratados com óleo de milho e maltodextrina serviram como controle (GC). Avaliou-se a presença de focos de criptas aberrantes (FCA) e sua localização nos cólons, além de danos e do padrão de metilação global do DNA na mucosa colônica. No cólon total, distal e proximal, o grupo TB apresentou menor (p<0,05) número de FCA com 4 ou mais criptas/cm2, considerados mais agressivos, em relação ao GC. Quanto aos danos no DNA, os grupos VA, TB e VA+TB apresentaram cometas de comprimentos menores (p<0,05) em comparação ao GC. Não houve diferenças estatisticamente significantes quanto ao padrão de metilação global do DNA. Assim, TB consiste em agente quimiopreventivo promissor da carcinogênese de cólon quando administrada isoladamente, mas não em associação com a VA. 15 Chemopreventive activities of tributyrin (TB) and vitamin A (VA) were administered in combination or not, before, during and after the initiation in rats subjected to carcinogenesis model of colon. Wistar rats received VA [1 mg/100 g of b.w (group VA)], tributyrin [200 mg/100 g of b.w (TB group)] or association of VA with BD (group VA + TB). Rats treated with corn oil and maltodextrin were used as control (GC). The presence of aberrant foci crypts (ACF) was evaluated and their location in colon tissue was determined. In addition, DNA damages and the global pattern of DNA methylation in colonic cells was measured. In total colon as in distal and proximal portions, the TB group presented lower (p <0.05) number of ACF with 4 or more crypts/cm2 in comparison to the GC group. The number of ACF with 4 or more crypts /cm2 was used as criteria of aggressiveness. In relation to the damage of DNA, the VA, VA + TB and TB groups exhibits smaller nucleoids lengths (p <0.05) compared to the GC group. There were no statistically significant differences on the global pattern of DNA methylation. So TB is promising chemopreventive agent in carcinogenesis of the colon when administered alone, but not in combination with the VA.

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Arunachalam, Subramaniam. "Experimental investigation into superabrasive reaming using design of experiments." Thesis, University of Hertfordshire, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.263025.

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Fernandes, Tais Motta. "Estudo da absorção aparente da clorofila do espinafre em ensaio com cães." Universidade de São Paulo, 2005. http://www.teses.usp.br/teses/disponiveis/9/9132/tde-09012018-165944/.

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O interesse pela clorofila vem crescendo recentemente devido a divulgação de dados que atribuem a esta substância muitos efeitos benéficos à saúde, introduzindo a possibilidade desta molécula oferecer proteção contra o desenvolvimento de doenças crônico-degenerativas e cânceres, agindo como um antioxidante e inibindo a mutagênese. Entretanto, as evidências científicas destas ações são ainda controversas. Perguntas estão surgindo a cerca do local de ocorrência de tais propriedades, se no intestino, antes da absorção, ou se devido a uma ação sistêmica, após absorção. O objetivo deste trabalho foi estudar as mudanças químicas da clorofila durante sua passagem pelo trato gastrointestinal, a absorção aparente e a detecção de derivados da clorofila no sangue. O estudo foi realizado durante 10 dias com 12 cães (Canis familiaris) divididos em 2 grupos. O grupo controle recebeu uma dieta comercial atendendo as exigências nutricionais, enquanto que o grupo teste recebeu a mesma dieta adicionada de 0,8% de espinafre liofilizado e 0,35% de óxido do cromo (como um indicador não absorvível). Foi realizada coleta parcial das fezes e após análise, a absorção aparente foi calculada. Em um segundo ensaio, o sangue foi coletado em 0, 15, 30, 45, 60, 90, 120 e 150 minutos após a ingestão da dieta que continha 10% de espinafre liofilizado. Os pigmentos do espinafre, da dieta, das fezes e do sangue foram extraídos com acetona 80%, isolados e quantificados por CLAE. Os resultados mostraram que a feofitinização foi a via predominante. Somente feofitinas a e b foram encontradas nas fezes. A absorção aparente da clorofila variou entre 4 e 6%. Entretanto, não foi possível detectar a presença de clorofila nem de seus derivados no plasma sanguíneo. Estes achados sugerem que os eventuais efeitos benéficos da clorofila devem ocorrer predominantemente no intestino e caso haja alguma passagem para o sangue, esta molécula parece ser rapidamente metabolizada a fim de prevenir efeitos tóxicos relacionados com a atividade fotossintética. In recent years there has been a growing interest on chlorophyll due to disclosing reports attributing to this substance manifold health benefits, introducing the possibility of this molecule protecting against the development of chronic-degenerative diseases and cancer, acting as an antioxidant and by inhibition of mutagenesis. However, the scientific evidences of these actions are still controversial. Questions have been raised about where these properties take place, if in the gut before absorption or if they are due to a post-absorption systemic action. The purpose of this research was to study the chemical changes of chlorophyll during its passage through the gastrointestinal tract, the apparent absorption and the appearance of any chlorophyll derivative in blood. The study was carried out during 1 O days in twelve dogs (Canis familiaris) divided into 2 groups. The control group received a commercial diet attending their nutritional requirements, while the test group received the same diet to which 0.8% of freeze-dried spinach and 0.35% of chromium oxide (as a non-absorbable indicator) were added. Partial collection and analysis of excreta was carried out and apparent absorption was calculated. ln a second experiment, blood was collected at 0, 15, 30, 45, 60, 90, 120 and 150 min after the intake of the diet, which contained 10% freeze-dried spinach. Pigments in spinach, diet, excreta and blood were extracted with 80% acetone, isolated and quantified by HPLC. The results showed that pheophitinization was the predominant pathway. Only pheophytins a and b were found in excreta. Apparent absorption of chlorophyll ranged from 4 to 6%. However, it was not possible to detect the presence of chlorophyll or any of its metabolites in blood plasma. These findings suggest that eventual beneficial effects of chlorophyll may occur predominantly in the gut and in case that some uptake occurs, the molecule seems to be metabolized fast enough in order to prevent toxic photosynthetic activity related effects.

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Libri sul tema "Experiments"

Universit"at Stuttgart. Instit"ut f"ur Leichte Flachentragwerke. IL25: Experimente = IL25 : Experiments. Stuttgart: Instut"t f"ur Leichte Flachentragwerke, 1990.

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Brüesch, Peter. Phonons: Theory and Experiments II: Experiments and Interpretation of Experimental Results. Berlin, Heidelberg: Springer Berlin Heidelberg, 1986.

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Bossan, Enrico. Experiments. [Crocetta del Montello]: Antiga edizioni, 2017.

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Michael, Heidelberger, and Steinle Friedrich, eds. Experimental essays =: Versuche zum Experiment. Baden-Baden: Nomos, 1998.

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Raja, Sekhar B. N., and Bhabha Atomic Research Centre, eds. A laboratory experimental setup for reflectivity experiments. Mumbai: Bhabha Atomic Research Centre, 1999.

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Roberts, E. A. Sequential data in biological experiments: An introduction for research workers. London: Chapman & Hall, 1992.

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Margaret, Barlow, and Cisneros Fontanals Art Foundation, eds. 10 defining experiments, 2006 =: 10 experimentos determinantes, 2006. Miami, Fla: Cisneros Fontanals Art Foundation, 2006.

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1941-, Webster Murray, and Sell Jane, eds. Laboratory experiments in the social sciences. Amsterdam: Academic Press/Elsevier, 2007.

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1941-, Webster Murray, and Sell Jane, eds. Laboratory experiments in the social sciences. Amsterdam: Academic Press/Elsevier, 2007.

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Orr, Larry L. Social experiments: Evaluating public programs with experimental methods. Thousand Oaks, Calif: Sage Publications, 1999.

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Tolovski, Ilin, Sašo Džeroski, and Panče Panov. "Semantic Annotation of Predictive Modelling Experiments." In Discovery Science, 124–39. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-61527-7_9.

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Abstract In this paper, we address the task of representation, semantic annotation, storage, and querying of predictive modelling experiments. We introduce OntoExp, an OntoDM module which gives a more granular representation of a predictive modeling experiment and enables annotation of the experiment’s provenance, algorithm implementations, parameter settings and output metrics. This module is incorporated in SemanticHub, an online system that allows execution, annotation, storage and querying of predictive modeling experiments. The system offers two different user scenarios. The users can either define their own experiment and execute it, or they can browse the repository of completed experimental workflows across different predictive modelling tasks. Here, we showcase the capabilities of the system with executing multi-target regression experiment on a water quality prediction dataset using the Clus software. The system and created repositories are evaluated based on the FAIR data stewardship guidelines. The evaluation shows that OntoExp and SemanticHub provide the infrastructure needed for semantic annotation, execution, storage, and querying of the experiments.

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Federer, Walter T. "Experiment Designs for Intercropping Experiments." In Springer Series in Statistics, 242–93. New York, NY: Springer New York, 1993. http://dx.doi.org/10.1007/978-1-4613-9305-4_10.

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Greenberg, Jerald, and Robert Folger. "Experiments Versus Quasi-experiments." In Controversial Issues in Social Research Methods, 79–93. New York, NY: Springer New York, 1988. http://dx.doi.org/10.1007/978-1-4612-3756-3_5.

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Kumagai, Takashi. "Experiments." In Visualization of Hydrogen-Bond Dynamics, 33–41. Tokyo: Springer Japan, 2012. http://dx.doi.org/10.1007/978-4-431-54156-1_3.

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Meester, Ronald. "Experiments." In A Natural Introduction to Probability Theory, 1–31. Basel: Birkhäuser Basel, 2003. http://dx.doi.org/10.1007/978-3-0348-7786-2_1.

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Alavi, Nazanin, and Mohsen Omrani. "Experiments." In Online Cognitive Behavioral Therapy, 131–44. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-99151-1_12.

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Moridi, Atieh. "Experiments." In Powder Consolidation Using Cold Spray, 21–32. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-29962-4_2.

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Riener, Andreas. "Experiments." In Sensor-Actuator Supported Implicit Interaction in Driver Assistance Systems, 119–82. Wiesbaden: Vieweg+Teubner, 2010. http://dx.doi.org/10.1007/978-3-8348-9777-0_12.

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Castro, António J. M., Ana Paula Rocha, and Eugénio Oliveira. "Experiments." In A New Approach for Disruption Management in Airline Operations Control, 161–94. Berlin, Heidelberg: Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-662-43373-7_7.

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Knapek, Christina A. "Experiments." In Phase Transitions in Two-Dimensional Complex Plasmas, 19–30. Berlin, Heidelberg: Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-19671-3_3.

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Atti di convegni sul tema "Experiments"

Bottalico, Elia. "Muon g-2 experiment and future muon experiments." In 20th International Conference on B-Physics at Frontier Machines, 053. Trieste, Italy: Sissa Medialab, 2024. http://dx.doi.org/10.22323/1.443.0053.

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Pronskikh, Vitaly. "Experiment as Theseus’s Ship: Which Experiments Preserve Diachronic Identity?" In Experiment as Theseus’s Ship: Which Experiments Preserve Diachronic Identity? US DOE, 2021. http://dx.doi.org/10.2172/1835858.

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Angel, Michael. "Conducting experiments with Experiment Manager." In the 28th conference. New York, New York, USA: ACM Press, 1996. http://dx.doi.org/10.1145/256562.256741.

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Uy, O., R. Benson, R. Erlandson, M. Boies, J. Lsho, G. Galica, B. Green, B. Wood, and D. Hall. "Contamination experiments in the Midcourse Space Experiment." In 34th Aerospace Sciences Meeting and Exhibit. Reston, Virigina: American Institute of Aeronautics and Astronautics, 1996. http://dx.doi.org/10.2514/6.1996-219.

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Samoilova, Svetlana V. "An approximate equation for multiple scattering of spaceborne lidar returns and its application for the retrieval of extinction and depolarization." In Lidar Multiple Scattering Experiments, edited by Christian Werner, Ulrich G. Oppel, and Tom Rother. SPIE, 2003. http://dx.doi.org/10.1117/12.512343.

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Voigtkaunder, Florian, and Guenter Czerwinski. "The Kaul-Samokhvalov-Balin-Samoilova approximation for spaceborne lidar returns." In Lidar Multiple Scattering Experiments, edited by Christian Werner, Ulrich G. Oppel, and Tom Rother. SPIE, 2003. http://dx.doi.org/10.1117/12.512344.

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Muenkel, Christoph. "Rain-snow discrimination with a biaxial lidar ceilometer." In Lidar Multiple Scattering Experiments, edited by Christian Werner, Ulrich G. Oppel, and Tom Rother. SPIE, 2003. http://dx.doi.org/10.1117/12.512353.

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Streicher, Juergen, Ines Leike, and Christian Werner. "New modules in the virtual backscatter lidar instrument." In Lidar Multiple Scattering Experiments, edited by Christian Werner, Ulrich G. Oppel, and Tom Rother. SPIE, 2003. http://dx.doi.org/10.1117/12.512342.

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Bruscaglioni, Piero, P. Poggi, Giovanni Macelloni, and Simonetta Paloscia. "Monte Carlo: an application to modeling remote sensing of vegetation - coherent and incoherent models." In Lidar Multiple Scattering Experiments, edited by Christian Werner, Ulrich G. Oppel, and Tom Rother. SPIE, 2003. http://dx.doi.org/10.1117/12.512327.

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Polonsky, Igor N., and Anthony B. Davis. "Exponential tails in lidar returns from dense clouds: a theoretical proof and the dependence on physical parameters." In Lidar Multiple Scattering Experiments, edited by Christian Werner, Ulrich G. Oppel, and Tom Rother. SPIE, 2003. http://dx.doi.org/10.1117/12.512329.

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Rapporti di organizzazioni sul tema "Experiments"

Appel, J. A. Experimental issues in high-sensitivity charm experiments. Office of Scientific and Technical Information (OSTI), July 1994. http://dx.doi.org/10.2172/10169335.

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Cutler, Theresa, Travis Grove, Rene Sanchez, and Jesse Norris. Thermal- Epithermal eXperiments - Hafnium Experiment Performed at the DOE’s National Criticality Experiments Research Center (NCERC). Office of Scientific and Technical Information (OSTI), November 2022. http://dx.doi.org/10.2172/1897395.

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Rosenberg, David M. Small-Scale Experiments.10-gallon drum experiment summary. Office of Scientific and Technical Information (OSTI), February 2015. http://dx.doi.org/10.2172/1178112.

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Symon, K. More thoughts on the Aladdin experiments - experiment set 2. Office of Scientific and Technical Information (OSTI), October 1988. http://dx.doi.org/10.2172/376385.

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Cordeiro dos Santos, Ana. The ‘Materials’ of Experimental Economics: technological versus behavioral experiments. DINÂMIA'CET-IUL, 2006. http://dx.doi.org/10.7749/dinamiacet-iul.wp.2006.51.

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Thorn, R. N., and D. R. Westervelt. Hydronuclear experiments. Office of Scientific and Technical Information (OSTI), February 1987. http://dx.doi.org/10.2172/6646692.

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Otto, Shawn. Underground Experiments. Office of Scientific and Technical Information (OSTI), June 2023. http://dx.doi.org/10.2172/1983840.

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Cutler, Theresa, Travis Grove, Holly Trellue, Erik Luther, Nicholas Wynne, Rene Sanchez, and John Downey. Hypatia: YH2 Experiment and Deimos: resurgence of graphite moderated experiments. Office of Scientific and Technical Information (OSTI), August 2022. http://dx.doi.org/10.2172/1885718.

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Hutchinson, Jesson D., David K. Hayes, and William L. Myers. National Criticality Experiments Research Center: Capabilities and Experiments. Office of Scientific and Technical Information (OSTI), February 2013. http://dx.doi.org/10.2172/1062156.

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Oldham, Nate. ATR Experiments Capabilities - ATF Capsule and Loop Experiments. Office of Scientific and Technical Information (OSTI), March 2021. http://dx.doi.org/10.2172/2396302.

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