Nuclear Energy
Mostrando 25-36 de 576 artigos, teses e dissertações.
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25. SÍNTESE E CARACTERIZAÇÃO DE SURFACTANTES ALQUILFENIL POLIGLICOSÍDICOS A PARTIR DA AMILOSE E ALQUIL FENÓIS EXTRAÍDOS DO LCC NATURAL
The surfactants were synthesized by condensing the obtained oligosaccharides of amylose and alkyl phenols extracted from the natural cashew nut shell liquid (nCNSL). The Nuclear Magnetic Resonance (NMR) and Fourier Transform Infrared Spectroscopy (FTIR) data showed aromatic ring bands, glycosidic rings, olefins and paraffins. The Nuclear Overhauser Effect Sp
Quím. Nova. Publicado em: 2016-08
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26. Derivatives of Cardanol through the Ene Reaction with Diethyl Azodicarboxylate
Cardanol is an alkyl/alkenyl phenolic material obtained from cashew nut shell liquid (CNSL), which is a byproduct of cashew nut processing. In an effort to develop new uses, cardanol was derivatized for the first time with diethyl azodicarboxylate (DEAD) through the ene reaction. The reaction was facile and required only the application of heat without a cat
J. Braz. Chem. Soc.. Publicado em: 2016-06
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27. Prevalence of the rs1801282 single nucleotide polymorphism of the PPARG gene in patients with metabolic syndrome
Objective This study aimed to get the genotypic and allelic frequencies of rs1801282 in 179 volunteer donors and 154 patients with Metabolic syndrome (MetS) in Brasilia, Brazil and also examine the association with anthropometric, biochemical and hemodynamic variables in the latter group. MetS comprises a group of diseases resulting from insulin resistance,
Arch. Endocrinol. Metab.. Publicado em: 2015-08
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28. Kinetic Investigation of Thermal Formation Processes of SiOC Glasses Derived from C-Containing Hybrid Polymeric Networks
In this study, hybrid polymeric networks were prepared by hydrosilylation reaction as precursors to silicon oxycarbide (SiOC) glass. The polymeric networks were prepared from poly(methylsiloxane) (PMS) and divinylbenzene (DVB) in the 80:20 and 20:80 (PMS/DVB) compositions, with or without activated charcoal (AC), which was used as additional carbon source. F
J. Braz. Chem. Soc.. Publicado em: 2015-05
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29. TUNGSTOPHOSPHORIC ACID HETEROGENIZED ONTO NH4ZSM5 AS AN EFFICIENT AND RECYCLABLE CATALYST FOR THE PHOTOCATALYTIC DEGRADATION OF DYES
Materials based on tungstophosphoric acid (TPA) immobilized on NH4ZSM5 zeolite were prepared by wet impregnation of the zeolite matrix with TPA aqueous solutions. Their concentration was varied in order to obtain TPA contents of 5%, 10%, 20%, and 30% w/w in the solid. The materials were characterized by N2 adsorption-desorption isotherms, XRD, FT-IR, 31P MAS
Quím. Nova. Publicado em: 2015-05
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30. A nuclear ribosomal DNA pseudogene in triatomines opens a new research field of fundamental and applied implications in Chagas disease
A pseudogene, designated as "ps(5.8S+ITS-2)", paralogous to the 5.8S gene and internal transcribed spacer (ITS)-2 of the nuclear ribosomal DNA (rDNA), has been recently found in many triatomine species distributed throughout North America, Central America and northern South America. Among characteristics used as criteria for pseudogene verification, secondar
Mem. Inst. Oswaldo Cruz. Publicado em: 06/03/2015
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31. Nuclear governance in Latin America
The article provides an outlook of the regional relations concerning nuclear technology in Latin America. For that purpose, we initially discuss the historic relationship of the Latin American countries with the set of rules, norms, principles and organizations involved in nuclear governance. The article provides an analysis of the connection between the mul
Contexto int.. Publicado em: 2013-12
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32. Caracterização de um sistema de fluorescência de raios X por dispersão em energia para análise quantitativa de ligas metálicas / Characterization of a system for X-ray fluorescence energy dispersion for quantitative analysis of metal aeloys
Neste trabalho são apresentados os procedimentos de caracterização de um sistema comercial portátil de Fluorescência de Raios X por dispersão em energia, o ARTAX 200, bem com seu processo de calibração. O sistema é composto por um tubo de Raios X, com anodo de Molibdênio e um detector XFlash (Silicon Drift Detector) refrigerado por Efeito Peltier.
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 27/09/2012
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33. Avaliação do potencial genotóxico do 51Cr2O3, marcador de digestibilidade, por meio da frequência de anormalidades nucleares em tilápias do Nilo (Oreochromis niloticus L.) / The evaluation of genotoxic potential of 51Cr2O3, a digestibility marker, by the frequency of nuclear abnormalities in Nile tilapia (Oreochromis niloticus L.)
Tilapia is the common name of a large number of species of cichlid fish. In aquaculture, this is one of the most profitable fish, since it presents lower feed conversion than other fish. The chromium oxide has been used as a marker for digestibility because it is inert and not alter the biological process of dietary intake. The use of radioactive form of chr
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 17/09/2012
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34. Análise dos procedimentos e critérios de implantação de feixes de raios X de referência ISO 4037 em baixas energias
According to the radiological protection principles, practices involving ionizing radiation must be planned and carried out under the guarantee that the values of individual doses, the number of people exposed to radiation and the probability of accidental exposures are as low as reasonably achievable. Therefore, radiation dosimetry is required to be done wi
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 09/08/2012
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35. Síntese e caracterização de misturas poliméricas condutoras para aplicação em membranas biodegradáveis e dispositivos eletroluminescentes / Synthesis and characterization of conducting polymeric blends for use in biodegradable membranes and electroluminescent devices
The electrical properties of some conducting polymers and their blends have contributed to the technological advancement in various areas such as medicine and microelectronics. Recently, photochemical synthesis and spinner techniques have been using to prepare polymeric blends with good conducting properties. In this study we report the preparation of conduc
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 02/08/2012
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36. Triatomic molecules in two-dimensional layers
We found universal laws for the spectrum of two-dimensional three-body systems, composed by two identical particles and a distinct one (AAB). These universal laws appear when the potential range (r_0) is much smaller than the size of the system. In two dimensions this condition is formulated as (E2 is the two-body energy and ? is the reduced mass). The zero
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 14/06/2012