Gas separation membrane

A method of fabricating a gas separation membrane includes providing a coextruded multilayer film that includes a first polymer layer formed of a first polymer material and a second polymer layer formed of a second polymer material, the first polymer material having a first gas permeability. The coextruded multilayer film is axially oriented such that the second polymer layer has a second gas permeability that is greater than the first gas permeability.Board of Regents, University of Texas Syste

The Reaction Specificity of Nanoparticles in Solution

Iron-based metallic and oxide nanoparticles have been shown to have enhanced reactivity towards a variety of chemical species, including chlorinated hydrocarbons and reducible oxyanions, which frequently contaminate ground water at DOE and other government and industrial sites. Possibly of greater importance is the ability of these nanoparticles to select specific reaction pathways, potentially facilitating the formation of the most environmentally acceptable reaction products

Algumas dimensões ainda atuais da análise do comportamento aplicada

Vinte anos atrás, uma nota antropológica descreveu as dimensões vigentes da análise do comportamento aplicada como prescrita e praticada em 1968: ela era, ou deveria se tornar, aplicada, comportamental, analítica, tecnológica, conceitual, eficaz e capaz de resultados apropriadamente generalizados. Uma nota antropológica semelhante, hoje, ainda encontra as mesmas dimensões prescritivas e, em maior medida, descritivas. Várias estratégias novas tornaram-se conhecidas; algumas no domínio da análise conceitual, algumas relacionadas ao status sociológico da disciplina e algumas sobre sua compreensão da natureza sistêmica necessária para qualquer disciplina aplicada que operará no domínio de comportamentos humanos importantes.Palavras-chave: aplicação, disseminação, tecnologia, terminologia, história.  Nota: referência do texto original, cuja permissão de tradução foi garantida pela editora Wiley: Baer, D. M., Wolf, M. M. & Risley, T. R. (1987). Some still-current dimensions of applied behavior analysis. Journal of Applied Behavior Analysis, 20(4), 313-327. https://doi.org/10.1901/jaba.1987.20-313. TradutoresJoão Eduardo Cattani Vilares eMarcos Spector Azoubel

Algumas dimensões atuais da análise do comportamento aplicada

A análise do comportamento individual tem sido sistematicamente estudada e praticada em vários contextos, ao longo de muitos anos. Essa análise resultou em descrições de princípios comportamentais que têm sido aplicados a problemas de comportamento socialmente relevantes nos últimos anos. As pesquisas de análise do comportamento aplicada – direcionadas a investigar as variáveis que podem ser efetivas para melhorar o comportamento sob estudo – possuem características que as distinguem das tradicionais pesquisas da análise do comportamento não aplicadas, conduzidas em laboratório. O estudo precisa ser aplicado, evidenciando a importância do comportamento alterado, comportamental, apresentando medidas diretas e quantitativas do comportamento alterado, e analítico, identificando com clareza o que foi responsável pela mudança. Além disso, o estudo deveria ser tecnológico, descrevendo precisamente todos os procedimentos que contribuíram para a mudança, conceitualmente sistemático, relacionando os procedimentos empregados e os resultados identificados com os processos comportamentais básicos, e efetivo, produzindo mudanças suficientemente relevantes, e deveria demonstrar alguma generalidade, planejando e avaliando a extensão dos efeitos da aplicação ao longo do tempo, para outras situações e para outros comportamentos.Palavras-chave: análise do comportamento aplicada, delineamentos experimentais, metodologia, pesquisa aplicada, tecnologia comportamental.  Nota: Referência do texto original, cuja permissão de tradução foi garantida pela editora Wiley: Baer, D. M., Wolf, M. M. & Risley, T. R. (1968). Some current dimensions of applied behavior analysis. Journal of Applied Behavior Analysis, 1(1), 91-97. Resumo e abstract foram elaborados a partir dos principais aspectos do texto; a publicação original não incluía resumo. https://doi.org/10.1901/jaba.1968.1-91.TradutoresJoão Eduardo Cattani Vilares eMarcos Spector Azoubel

Final Report for the Study on S-Implanted Alloy 22 in 1 M NaCl Solutions

The objective of this study was to examine the effects of high levels of S in the near-surface region on the passivity of Alloy 22, a corrosion resistant Ni-Cr-Mo alloy, in deaerated 1 M NaCl solution. Near-surface concentrations of S up to 2 at.% were achieved in Alloy 22 test specimens by implanting them with S. The S-implanted samples were then evaluated in short-term electrochemical tests in the salt solution and subsequently analyzed with X-ray Photoelectron Spectroscopy (XPS) for film thickness and composition. Specimens tested included non-implanted and annealed Alloy 22 samples, samples implanted with S, and “blanks” implanted with Ar as an ion that would simulate the “damage” of S implantation without the chemical effect. A sample of S-implanted Alloy 22 was also exposed to solution for 29 days and analyzed for evidence of S accumulation at the surface over longer times

Status Report on the Development of Research Campaigns

Research campaigns were conceived as a means to focus EMSL research on specific scientific questions. Campaign will help fulfill the Environmental Molecular Sciences Laboratory (EMSL) strategic vision to develop and integrate, for use by the scientific community, world leading capabilities that transform understanding in the environmental molecular sciences and accelerate discoveries relevant to the Department of Energy’s (DOE’s) missions. Campaigns are multi-institutional multi-disciplinary projects with scope beyond those of normal EMSL user projects. The goal of research campaigns is to have EMSL scientists and users team on the projects in the effort to accelerate progress and increase impact in specific scientific areas by focusing user research, EMSL resources, and expertise in those areas. This report will give a history and update on the progress of those campaigns

Size-Dependent Specific Surface Area of Nanoporous Film Assembled by Core-Shell Iron Nanoclusters

Nanoporous films of core-shell iron nanoclusters have improved possibilities for remediation, chemical reactivity rate, and environmentally favorable reaction pathways. Conventional methods often have difficulties to yield stable monodispersed core-shell nanoparticles. We produced core-shell nanoclusters by a cluster source that utilizes combination of Fe target sputtering along with gas aggregations in an inert atmosphere at 7∘C. Sizes of core-shell iron-iron oxide nanoclusters are observed with transmission electron microscopy (TEM). The specific surface areas of the porous films obtained from Brunauer-Emmett-Teller (BET) process are size-dependent and compared with the calculated data

Size-dependent specific surface area of nanoporous film assembled by core-shell iron nanoclusters

Nanoporous films of core-shell iron nanoclusters have improved possibilities for remediation, chemical reactivity rate, and environmentally favorable reaction pathways. Conventional methods often have difficulties to yield stable monodispersed core-shell nanoparticles. We produced core-shell nanoclusters by a cluster source that utilizes combination of Fe target sputtering along with gas aggregations in an inert atmosphere at 7 AE C. Sizes of core-shell iron-iron oxide nanoclusters are observed with transmission electron microscopy (TEM). The specific surface areas of the porous films obtained from Brunauer-Emmett-Teller (BET) process are size-dependent and compared with the calculated data

The Development of New User Research Capabilities in Environmental Molecular Science: Workshop Report

On August 1, and 2, 2006, 104 scientists representing 40 institutions including 24 Universities and 5 National Laboratories gathered at the W.R. Wiley Environmental Molecular Sciences Laboratory, a National scientific user facility, to outline important science challenges for the next decade and identify major capabilities needed to pursue advanced research in the environmental molecular sciences. EMSL’s four science themes served as the framework for the workshop. The four science themes are 1) Biological Interactions and Interfaces, 2) Geochemistry/Biogeochemistry and Surface Science, 3) Atmospheric Aerosol Chemistry, and 4) Science of Interfacial Phenomena

XPS guide: Charge neutralization and binding energy referencing for insulating samples

This guide deals with methods to control surface charging during XPS analysis of insulating samples and approaches to extracting useful binding energy information. The guide summarizes the causes of surface charging, how to recognize when it occurs, approaches to minimize charge buildup, and methods used to adjust or correct XPS photoelectron binding energies when charge control systems are used. There are multiple ways to control surface charge buildup during XPS measurements, and examples of systems on advanced XPS instruments are described. There is no single, simple, and foolproof way to extract binding energies on insulating material, but advantages and limitations of several approaches are described. Because of the variety of approaches and limitations of each, it is critical for researchers to accurately describe the procedures that have been applied in research reports and publications