Platinum
Mostrando 25-36 de 461 artigos, teses e dissertações.
-
25. Studies of the Colloidal Properties of Superparamagnetic Iron Oxide Nanoparticles Functionalized with Platinum Complexes in Aqueous and PBS Buffer Media
This work has focused on the synthesis of three nanosystems composed of superparamagnetic iron oxide nanoparticles (SPIONs) coated either with a carboxylate platinum(IV) complex (PD = cis,cis,trans-[Pt(NH3)2Cl2(HOOCCH2CH2COO)(OH)]) or with platinum(II) complex functionalized dextrans (DexPt1 = [Pt(Dex-NH2)Cl3] and DexPt2 = [Pt(Dex-NH2)(NH3)2(H2O)]). All nano
J. Braz. Chem. Soc.. Publicado em: 2017-05
-
26. Synthesis and evaluation of platinum complexes with potential antitumor activity
Abstract A novel series of platinum (II) complexes was synthesized and the complexes were evaluated for their in vitro cytotoxicity against four human cancer cells lines. Five platinum complexes showed activity against at least one tumor cell line. Complexes 3 and 6 were promising, being active, at micromolar concentrations, against all the assayed tumor cel
Braz. J. Pharm. Sci.. Publicado em: 20/04/2017
-
27. Avaliação física, morfológica e identificação de proteínas seminais em ovinos da raça Santa Inês
RESUMO Este estudo teve como objetivo identificar proteínas do plasma seminal associadas à fertilidade em ovinos da raça Santa Inês em Manaus, AM, utilizando técnicas de eletroforese bidimensional associadas à espectrometria de massa. Amostras de sêmen de oito carneiros adultos foram coletadas, retirando-se uma alíquota para as avaliações físicas
Rev. bras. saúde prod. anim.. Publicado em: 2017-03
-
28. Platinum-Based Alloys: Investigation of the Effect of Impurities Content on Creep Rate, Rupture Time and Relative Elongation at High Temperatures
This paper presents the results of research of the effect of impurities content on high-temperature resistance of selected platinum alloys. Alloys of following systems were investigated: Pt-Rh, Pt-Rh-Pd, Pt-Rh-Pd-Ru and Pt-Rh-Pd-Ir-Au. Universal device for tensile testing of materials at high temperatures was used for examination. Investigations were carried
Mat. Res.. Publicado em: 05/01/2017
-
29. Chemotherapy for advanced non-small cell lung cancer in the elderly population
ABSTRACT BACKGROUND: Approximately 50% of patients with newly diagnosed non-small cell lung cancer (NSCLC) are over 70 years of age at diagnosis. Despite this fact, these patients are underrepresented in randomized controlled trials (RCTs). As a consequence, the most appropriate regimens for these patients are controversial, and the role of single-agent or
Sao Paulo Med. J.. Publicado em: 2016-10
-
30. ELECTROCHEMICAL OXIDATION OF ETHYLENE AT PANI/Pt AND Ag/PANI/Pt MODIFIED ELECTRODES
The electrochemical behavior of ethylene on PANI/Pt and Ag/PANI/Pt modified electrodes was investigated in different media. Morphology of the deposits of PANI were observed by SEM analysis, complemented by the EDX techniques to obtain the Ag composition that shows that Ag is deposited in the polymeric matrix which covered the whole platinum surface. The elec
Quím. Nova. Publicado em: 2016-09
-
31. Da Idade do Ouro a Era Platinum Rastejante: uma periodização do desenvolvimento Latino Americano na tradição Robinsoniana
RESUMOEste artigo analisa o modelo de crescimento de Joan Robinson, aqui adaptado a fim de fornecer uma taxonomia exploratória de Eras de Crescimento. Essas Eras ou Anos de Crescimento foram para Robinson uma maneira de fornecer conexões lógicas entre o crescimento da produção, a acumulação de capital, o grau de frugalidade, o salário real e ilustrar
Brazil. J. Polit. Econ.. Publicado em: 2015-12
-
32. Derivação Monte Carlo de espectros filtrados de raios X de ânodo de tungstênio para determinação de dose em mamografia digital
Resumo Objetivo: Derivar espectros filtrados de raios X de tungstênio utilizados em sistemas de mamografia digital por meio de simulações Monte Carlo. Materiais e Métodos: Espectros filtrados por filtro de ródio foram obtidos para potenciais do tubo entre 26 e 32 kV. Os valores de camada semirredutora (CSR) dos espectros filtrados simulados foram comp
Radiol Bras. Publicado em: 2015-12
-
33. Electrosynthesis and Characterisation of Polymer Nanowires from Thiophene and its Oligomers
Validating methodology formerly reported, polythiophene electrosynthesised as nanowires from the monomer and some of its oligomers is now described. The work is conducted on a platinum electrode previously modified with a template that tunes the polymer growth inside the confined space of the pores. In addition, it was confirmed that the use of larger chain-
J. Braz. Chem. Soc.. Publicado em: 2015-11
-
34. Testing electrode suitability for field stimulation of high-threshold biological preparations
IntroductionA problem posed by electrical field (E) stimulation of biological preparations with high excitation threshold is that the E intensity required for excitation is likely to induce water electrolysis at the electrode surface, which can alter the extracellular medium and cause deleterious effects on the cells. In this study, different electrode mater
Res. Biomed. Eng.. Publicado em: 2015-09
-
35. O PAPEL DOS ÂNIONS NO COMPORTAMENTO VOLTAMÉTRICO DE SUPERFÍCIES MONOCRISTALINAS DE PLATINA
This review examined the state of the art of electrochemical and thermodynamic studies involving characteristic features related to the adsorption of anions present in the electrolyte solutions in contact with platinum single crystals electrodes.
Quím. Nova. Publicado em: 2015-06
-
36. Enhanced Photocatalytic Activity of Pure Anatase Tio2 and Pt-Tio2 Nanoparticles Synthesized by Green Microwave Assisted Route
High-yield, rapid and facile synthesis of elongated pure anatase titania nanoparticles has been achieved through a nonaqueous microwave-based approach. The residual organics onto nanoparticles surfaces were completely removed through a new treatment under ozone flow, at room temperature in air. Such an ozone cleaning method revealed an effective inexpensive
Mat. Res.. Publicado em: 2015-06