Attenuation Processes
Mostrando 1-12 de 54 artigos, teses e dissertações.
-
1. High-resolution computed tomography findings in young infants with cystic fibrosis detected by newborn screening
OBJECTIVE: High-resolution computed tomography (HRCT) allows the early detection of pathological changes in the lung structure, and reproducible scoring systems can be used to quantify chest computed tomography (CT) findings in patients with cystic fibrosis (CF). The aim of the study was to describe early HRCT findings according to a validated scoring syste
Clinics. Publicado em: 21/10/2019
-
2. Evaluation of a Metal-Organic Composite (Tungsten-Lignin) for Attenuation of Gamma Radiation
The objective of this work was to use tungsten and lignin as precursors to obtain a metal-organic composite tungsten-lignin (W-Lig) using different sintering temperatures. Tungsten is a refractory metal and it was selected for the composite since it is widely used for high-energy radiation shielding as it has an excellent absorption cross section for thermal
Mat. Res.. Publicado em: 02/09/2019
-
3. Dynamic Arrays Based on Magnetically Controlled Particles: Synthesis and Application
Growth mechanisms of dynamic granular arrays based on magnetically controlled particles are presented. Method of the external rotating magnetic field (ERMF), based on a dipole interaction of magnetic spherical Fe3O4 particles in highly ordered volume arrays is proposed and a design for its practical implementation is developed. The magnetic assembly can resu
Mat. Res.. Publicado em: 19/08/2019
-
4. Geochemistry of acid mine drainage from a coal mining area and processes controlling metal attenuation in stream waters, southern Brazil
Influência de drenagem ácida sobre a qualidade de água e sedimento foi investigada em uma área de mineração de carvão (sul do Brasil). A drenagem ácida mostrou pH entre 3,2 e 4,6 e elevadas concentrações de sulfato, As e metais, dos quais, Fe, Mn e Zn excederam os limites para emissão de efluentes da legislação brasileira. Arsênio também exced
An. Acad. Bras. Ciênc.. Publicado em: 14/05/2014
-
5. Influence of the dopaminergic system, CREB, and transcription factor-κB on cocaine neurotoxicity
Cocaine is a widely used drug and its abuse is associated with physical, psychiatric and social problems. Abnormalities in newborns have been demonstrated to be due to the toxic effects of cocaine during fetal development. The mechanism by which cocaine causes neurological damage is complex and involves interactions of the drug with several neurotransmitter
Braz J Med Biol Res. Publicado em: 15/10/2013
-
6. Finite element reduction strategy for composite sandwich plates with viscoelastic layers
Composite materials have been regarded as a convenient strategy in various types of engineering systems such as aeronautical and space structures, as well as architecture and light industry products due to their advantages over the traditional engineering materials, such as their high strength/stiffness relation characteristics and their anti-corrosion prope
Mat. Res.. Publicado em: 21/12/2012
-
7. Memória jurídica : a linguagem processual dos crimes de estrupos, sob a ótica da estilística léxica
This thesis analyzed the processual language of the crimes of rape reported in the County of Cornelio Procopio, from the 1950s until 2001, to identify and describe the use of discourse-stylistic arrangements and as a result, assess its consequences and to check linguistic evolution experienced in this type of discourse. Knowing the historical position of sch
Publicado em: 2011
-
8. Fabrication and characterization of tellurite and germanate waveguides for optoelectronics applications. / Produção e caracterização de guias de onda de telureto e germanato para aplicações em optoeletrônica.
The objective of this work is the production and characterization of GeO2-PbO and TeO2-ZnO waveguides. The waveguides were produced using thin films and glasses by means of different procedures. The films were produced using the RF magnetron sputtering method and characterized by a variety of techniques. In particular, scanning electron microscopy was essent
Publicado em: 2010
-
9. Environmental implications from leachates attenuation processes in places of solid urban wastes disposal / Implicações ambientais dos processos de atenuação de lixiviado em locais de disposição de resíduos sólidos urbanos
Estudos recentes constataram a existência de processos que permitem a atenuação natural dos contaminantes presentes nos lixiviados. O adequado entendimento destes processos pode originar benefícios possíveis de serem aplicados em aterros antigos, novos ou naqueles que ainda serão concebidos. O presente estudo avaliou o comportamento e a atenuação de
Publicado em: 2009
-
10. Radioatividade de rochas provenientes das formações geológicas pertencentes à bacia hidrográfica do Rio Tibagi
This work is a study of the 40K and the 238U and 232Th series radioactivity in rocks measured with high resolution gamma ray spectrometry. The rocks were taken from the geologic formations in the region of the Tibagi river hydrographic basin. The course of this river cuts through the Paleozoic and Mesozoic stratigraphic sequences of the Paraná sedimentary b
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 12/08/2008
-
11. Toxicidade causada pela cocaína in vitro: participação da via dopaminérgica e do fator de transcrição NF-kB. / In vitro cocaine toxicity: participation of the dopaminergic pathway and the transcription factor NF-kB.
Cocaine is a drug deeply used and its abuse is associated with physical, psychiatric and social problems. Abnormalities in newly born have been demonstrated due to the toxics effects of cocaine during fetal development. The mechanism by which cocaine causes neurological damages is very complex and involves interactions of the drug with several neurotransmitt
Publicado em: 2008
-
12. Sobre a morfologia e a sintaxe da língua Guajá
This dissertation presents an analysis of morphological and syntactic aspects of the Guajá language (Tupí-Guaraní family), focusing on word classes, their inflectional and derivational morphology, as well as on the structure of independent and dependent clauses. Chapter 1 deals with lexical word classes nouns, verbs, adjectives, adverbs and numerals and d
Publicado em: 2007