Results 91 to 100 of about 4,837,583 (307)

Resolving the Structural Duality of Graphene Grain Boundaries

open access: yesAdvanced Materials, EarlyView.
Cantilever ncAFM resolves the atomic structure of grain boundaries in graphene, revealing coexisting stable and metastable types. Both contain pentagon/heptagon defects, but metastable GBs show irregular geometries. Modeling shows metastable GBs form under compression, exhibiting vertical corrugation, while stable GBs are flat.
Haojie Guo   +11 more
wiley   +1 more source

A retomada do Centro da cidade

open access: yesColeção Estudos Cariocas, 2003
A macrofunção Habitar o Centro foi criada para coordenar esforços dos órgãos municipais e demais instituições ligadas ao tema da promoção do uso habitacional no Centro do Rio.
Macrofunção Habitar o Centro Prefeitura da Cidade do Rio de Janeiro
doaj   +1 more source

Parasite and reproductive features of Scinax nasicus (Anura: Hylidae) from a South American subtropical area [PDF]

open access: yes, 2009
Desde febrero de 2002 a diciembre de 2004, se analizó la fauna de helmintos parásitos y las características reproductivas de Scinax nasicus en un área cercana a la ciudad de Corrientes, Argentina.
Duré Pitteri, Marta Inés   +4 more
core  

Siguiendo los trazos de un area emergente: análisis bibliométrico de la Psicología Política Latinoamericana en el periodo 2000-2010 [PDF]

open access: yes, 2014
This study examines contemporary Political Psychology in Latin America, by means of a bibliometric approach, for the period 2000-2010. Results show a steady growth of the field in the region (especially in Spain, Colombia, Mexico, Argentina and Brazil ...
Brussino, Silvina Alejandra   +3 more
core   +1 more source

Water Permeates and Plasticizes Amorphous Carbon Dots: Unraveling the Inner Accessibility of the Nanoparticles by Glass Transition Studies

open access: yesAdvanced Materials, EarlyView.
The water permeability of amorphous carbon dots (CDs) is demonstrated by investigating their plasticization. Novel polyamide‐based and amorphous nanoparticles are synthesized by controlling their inner packing density. Water plasticization is evidenced by the decrease of the CDs glass transition temperature with increasing the hydration degree.
Elisa Sturabotti   +8 more
wiley   +1 more source

The role of different parameters of synthesis in the final structure of Ti-containing mesoporous materials [PDF]

open access: yes, 2008
Ti-containing mesoporous materials have been prepared by hydrothermal synthesis at 373 K and compared to pure siliceous MCM-41 synthesized in the same conditions.
Chanquia, Corina Mercedes   +3 more
core   +1 more source

A Functional 2D Carbon Allotrope Combining Nanoporous Graphene and Biphenylene Segments

open access: yesAdvanced Materials, EarlyView.
The synthesis of a novel nanoporous graphene (NPG) is reported with biphenylene segments via thermal fusion of 12‐armchair porous graphene nanoribbons grown on gold surfaces. Characterization using STM, AFM, and DFT reveals low‐defect semiconducting behaviour and tunable band gaps.
Paula Angulo‐Portugal   +14 more
wiley   +1 more source

La desintegración de la UCD: estado de la cuestión

open access: yesEl Futuro del Pasado, 2011
La historia de la UCD es intensa. Se trata de un partido construido desde el poder para llevar a cabo la Transición. Un partido que cumple perfectamente su función y que conectaba con los electores.
J. Daniel Molina Jiménez
doaj  

A periferia do Centro: produção artística da população invisibilizada do Centro do Rio de Janeiro

open access: yesPoiésis, 2018
Constituída na dinâmica das interações com e entre pessoas e em diferentes tempos, as cidades não podem ser pensadas como uma entidade apartada de seus moradores.
Clarisse Monteiro
doaj   +1 more source

Oviposition in the blood-sucking insect Rhodnius prolixus is modulated by host odors [PDF]

open access: yes, 2015
Background: Triatomine bugs are blood-sucking insects, vectors of Chagas disease. Despite their importance, their oviposition behavior has received relatively little attention. Some triatomines including Rhodnius prolixus stick their eggs to a substrate.
Guerenstein, Pablo Gustavo   +1 more
core   +1 more source

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