23 resultados para Richardson, John, fl.1790.

em Scielo Saúde Pública - SP


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My plan is to examine Nietzsche's view of (what is I think) the most characteristically Kantian kind of argument, what's now often called 'transcendental argument'. I understand this as an argument in which a concept or principle or value is justified as a 'condition of the possibility' of something indisputable (or indispensable). I will look at Nietzsche's critique of this pattern of argument in Kant, but also at the ways he still uses such arguments himself, in all three of the sectors of Kant's critique: theoretical, practical, aesthetic.

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Hymenoepimecis neotropica (Brues & Richardson) (Hymenoptera, Ichneumonidae, Pimplinae) parasitoid of Araneus omnicolor (Keyserling) (Araneae, Araneidae): first host record and new occurrence to Brazil. The species of the genus Hymenoepimecis occur only in Neotropical region, being recognized for using as their hosts spiders which build orbicular webs. That wasp was described occurring only in the Guyana. This work expands the geographical distribution of the species to Brazil and records the spider Araneus omnicolor (Araneae, Araneidae) as its host. Furthermore, it provides information about the natural history of this interaction.

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A résumé of the evolution of quantum chemistry methodologies is presented. The pioneering contributions of John A. Pople and Water Kohn, the 1998 Nobel Prize Laureates in Chemistry, to the development of quantum chemistry computational methods for studying the properties of molecules and their interaction is discussed.

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Atmospheric chemistry in Brazil from 1790 to 1853. Scarcely any mention is made today of investigations carried out in Brazil during the period above on the science of the atmosphere. Yet the study of these cases reveals much about the milieu of a few devoted men who laboured to pursue a scientific career. That such an arcane topic has been the concern of investigators at such an early date may come as a surprise to many. The subject was an oddity as a field of study anywhere at the time, and its history deserves the attention of present-day chemists.

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The QuEChERS extraction method followed by quantification using HPLC/UV-FL was evaluated for deoxynivalenol (DON) and zearalenone (ZEA) determination in natural and parboiled rice and their fractions (bran and husk). The comparison between QuEChERS and partition with acetonitrile extraction showed that the first one was better. It presented higher recovery (91% for DON, 105% for ZEA) wih precision ranging from 1.5 to 18.6%. The limits of quantification were 22.2 µg kg-1 for DON and 4.3 µg kg-1 for ZEA. DON and ZEA showed higher levels in endosperm of parboiled rice (8 e 111.7 µg kg-1, respectively) when compared to natural rice.

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John Locke é conhecido, sobretudo, por ser um dos fundadores do liberalismo. No entanto, pesquisas recentes apontam para novas interpretações do pensador inglês. No caminho dessa tendência, o objetivo deste texto é analisar os elementos republicanos na "Carta sobre a tolerância" de Locke.

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Abstract: The concentration of heavy metals (Cr, Fe, Al, As, Cd, Cu, Pb, Mo, Ni, Se and Zn) was evaluated in the blood of nestling blue macaws (Anodorhynchus hyacinthinus) captured in the Pantanal, Mato Grosso do Sul (n=26) in 2012; this was based on the hypothesis that these birds exhibit levels of these heavy metals in their organism and that these interfere in hatching success, weight and age of the chicks. Blood samples were digested with nitric acid and hydrochloric acid and the quantification of metals was performed by ICP-OES (Optical Emission Spectroscopy and Inductively Coupled Plasma). Blood samples of nestlings showed concentrations of Cr (0.10μg/g) Fe (3.06μg/g) Al (3.46μg/g), Cd (0.25μg/g) Cu (0.74μg/g), Mo (0.33μg/g), Ni (0.61μg/g), Se (0.98μg/g), and Zn (2.08μg/g). The levels of heavy metals found were not associated with weight, age and hatching success of the chicks.

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RESUMO - (Fitossociologia de um remanescente de mata mesófila semidecídua urbana, Bosque John Kennedy, Araguari, MG, Brasil). Um estudo fitossociológico foi realizado no Bosque Municipal John Kennedy, município de Araguari, MG (48°11'19''W e 18°38'35''S). O bosque, com aproximadamente 11,2 ha, situa-se no perímetro urbano e é formado principalmente por uma mata mesófila semidecídua. No levantamento fitossociológico realizado, amostraram-se, em 1,2 ha, 1827 indivíduos, pertencentes a 46 famílias; 88 gêneros e 113 espécies, com um índice de diversidade de Shannon de H' = 3,75 nats/indivíduo. Os parâmetros fitossociológicos indicam as espécies mais importantes: Licania apetala, Micrandra elata, Copaifera langsdorffii, Astronium nelson-rosae e Alchornea glandulosa, e as famílias mais importantes: Chrysobalanaceae, Euphorbiaceae, Caesalpinaceae, Mimosaceae e Anacardiaceae. A ocorrência de algumas espécies incluidas entre as principais, caracteristicamente, pioneiras (Alchornea glandulosa e Piptocarpha macropoda), ou secundárias (Didymopanax macrocarpum e Maprounea guianensis), pode ser explicada pela existência de algumas áreas de clareiras, no interior dessa mata semidecídua, mas que, aparentemente, ainda não interferiram na estrutura da mata como um todo.